# \#relays **URL:** https://forum.digikey.com/tag/relays/2188.md [Latest](https://forum.digikey.com/latest.md) · [Categories](https://forum.digikey.com/categories.md) · [Tags](https://forum.digikey.com/tags.md) --- ## [使用 NPN Darlington 電晶體透過 3.3VDC 微控制器驅動高功率繼電器](https://forum.digikey.com/t/npn-darlington-3-3vdc/72496)
**Author:** [@Kevin\_6462](https://forum.digikey.com/u/Kevin_6462)\ **Replies:** 0\ **Last updated:** [October 7, 2026, 6:19am UTC](https://forum.digikey.com/t/npn-darlington-3-3vdc/72496 "2026-10-07T06:19:31Z")
將微控制器連接到高功率負載是一項設計挑戰。對於本文介紹的 Arduino Nano 33 IoT（如圖 1 所示）等 3.3VDC 微控制器而言，尤其如此。通常，這些新型高性能 32bit 微控制器的性能不如其 5VDC 的同類產品。例如，Nano 33 IoT 的每個引腳電流限制為 7mA，而 Arduino Nano Every 的每個引腳可提供 15mA 的電流。電流降低，再加上電壓降低，需要特別注意。許多教程中介紹的簡單 NPN… --- ## [DPDT Relay high NC rating](https://forum.digikey.com/t/dpdt-relay-high-nc-rating/71660)
**Author:** [@billyfromhill](https://forum.digikey.com/u/billyfromhill)\ **Replies:** 3\ **Last updated:** [August 31, 2026, 11:25am UTC](https://forum.digikey.com/t/dpdt-relay-high-nc-rating/71660 "2026-08-31T11:25:08Z")
I am looking for a DPDT (Two form C) relay with a high NC rating of 10A or higher with 12V coil. I have found a lot of relays but they all seem to have 3A NC rating which is too low for my application. This is for an aut… --- ## [交流繼電器與直流繼電器規格：線圈額定值、接點額定值及常見錯誤](https://forum.digikey.com/t/topic/70627)
**Author:** [@Kevin\_6462](https://forum.digikey.com/u/Kevin_6462)\ **Replies:** 0\ **Last updated:** [July 20, 2026, 1:58am UTC](https://forum.digikey.com/t/topic/70627 "2026-07-20T01:58:01Z")
繼電器常被誤解，因為我們常常將線圈額定值與接點額定值混淆。本文將會解釋交流和直流繼電器線圈的區別，並闡述了繼電器觸點額定值如何隨電壓、電流類型和負載類型而變化。 重點總結 線圈額定值和接點額定值並非同一概念。 繼電器線圈設計用於交流或直流工作。 觸點額定值隨電壓、電流類型和負載類型而變化。 感性負載和直流負載對觸點的磨損比阻性交流負載更大。 選擇繼電器時，請務必根據實際負載電流來確定額定值，而不僅僅是標稱電流。 交流與直流線圈規格 … --- ## [什麼是多功能繼電器？](https://forum.digikey.com/t/topic/70625)
**Author:** [@Kevin\_6462](https://forum.digikey.com/u/Kevin_6462)\ **Replies:** 0\ **Last updated:** [July 20, 2026, 1:27am UTC](https://forum.digikey.com/t/topic/70625 "2026-07-20T01:27:02Z")
本文將會介紹多功能延時繼電器的工作原理，以及如何在課堂或實驗室中示範其操作模式。 重點 延時可調，從幾秒到24小時以上 繼電器具有多種模式，包括常見操作，如接通延遲、斷開延遲、脈衝、單發等 Phase Dock 訓練器為實驗提供了方便的基礎 本文包含嵌入式影片來示範繼電器的工作模式 多功能延時繼電器簡介 延時功能常用於工業控制、HVAC 和住宅系統。一個簡單的例子是運動感應燈。燈號會立即亮起，但會在預設時間過後熄滅。更複雜的例子是… --- ## [高壓電動車絕緣監測解決方案：利用 Vishay VORA1150 實現可靠的 Isolation Measurement](https://forum.digikey.com/t/vishay-vora1150-isolation-measurement/69921)
**Author:** [@Barley\_Li](https://forum.digikey.com/u/Barley_Li)\ **Replies:** 0\ **Last updated:** [June 22, 2026, 9:13am UTC](https://forum.digikey.com/t/vishay-vora1150-isolation-measurement/69921 "2026-06-22T09:13:19Z")
\## 前言 隨著電動車（EV）技術快速發展，電池系統電壓持續提升，目前許多高性能電動車平台已超過 800V。面對更高的工作電壓，如何確保高壓系統安全性並符合功能安全標準，成為車用電子設計的重要課題。 為了保障駕駛與乘客安全，同時符合 ISO 6469-1、ISO 26262 等功能安全規範，電動車必須具備可靠的絕緣監測機制（Isolation Monitoring）。而隨著高壓平台普及，隔離監測電路對高耐壓切換元件的需求也日益增加… --- ## [릴레이를 여는 데 얼마나 걸리나요?](https://forum.digikey.com/t/topic/64182)
**Author:** [@Brian\_Lee](https://forum.digikey.com/u/Brian_Lee)\ **Replies:** 0\ **Last updated:** [January 15, 2026, 2:58am UTC](https://forum.digikey.com/t/topic/64182 "2026-01-15T02:58:21Z")
이전 게시글에서는 릴레이를 닫는 데 걸리는 시간을 측정하여 릴레이의 특성을 살펴보았습니다. 이번 게시글에서는 릴레이를 여는 데 걸리는 시간을 측정하여 상반된 질문에 답해 보겠습니다. 두 질문 사이의 많은 유사점과 함께 몇 가지 예상치 못한 놀라운 점도 발견할 수 있을 것입니다. 이전 게시글을 아직 읽어보지 않았다면 꼭 읽어보시기 바랍니다. 특히 시정수와 L/nR 표기의 의미에 대한 내용을 … --- ## [릴레이를 닫는 데 얼마나 걸리나요?](https://forum.digikey.com/t/topic/63981)
**Author:** [@Brian\_Lee](https://forum.digikey.com/u/Brian_Lee)\ **Replies:** 0\ **Last updated:** [January 9, 2026, 4:09am UTC](https://forum.digikey.com/t/topic/63981 "2026-01-09T04:09:00Z")
릴레이를 얼마나 빠르게 닫을 수 있을까요? 이 질문에는 너무 많은 요소가 관여하기 때문에 명확한 답을 내리기는 어렵습니다. 그러나, 릴레이의 동작과 물리적 특성에 대해 배울 수 있는 흥미로운 기회입니다. 여기에는 전기자 (armature)가 솔레노이드 코어에 물리적으로 접촉하는 과정에서의 자기적 특성 (인덕턴스), 접점 전환 시간, 접점 바운스(contact bounce), 그리고 공급 전압… --- ## [PWM 구동을 활용한 DC 릴레이의 에너지 효율 개선](https://forum.digikey.com/t/pwm-dc/61589)
**Author:** [@Brian\_Lee](https://forum.digikey.com/u/Brian_Lee)\ **Replies:** 0\ **Last updated:** [October 28, 2025, 7:18am UTC](https://forum.digikey.com/t/pwm-dc/61589 "2025-10-28T07:18:28Z")
DC 제어 릴레이 및 콘택터에 펄스 폭 변조(PWM) 구동 방식을 적용하면 에너지를 절약할 수 있습니다. 이 간단한 기법을 통해 릴레이의 소비 전력을 손쉽게 절반으로 줄일 수 있습니다. 이 글에서는 릴레이에 대해 간략히 소개한 후, 그림 1과 같이 아두이노 나노 에브리와 같은 마이크로컨트롤러를 사용해 PWM 구동 신호를 구현하는 방법을 보여줍니다. 그림 1: 아두이노 나노 에브리 마이… --- ## [Relay substitute](https://forum.digikey.com/t/relay-substitute/45090)
**Author:** [@wesct](https://forum.digikey.com/u/wesct)\ **Replies:** 1\ **Last updated:** [October 10, 2024, 3:38pm UTC](https://forum.digikey.com/t/relay-substitute/45090 "2024-10-10T15:38:07Z")
i’m looking for a sturdy sub for the HF33f 012-zs3 – same footprint same 12v coil equal or better lifetime… thanks, wes appliance science, santa fe, nm --- ## [Alternative for KMD5A relay from Leach Corp](https://forum.digikey.com/t/alternative-for-kmd5a-relay-from-leach-corp/43206)
**Author:** [@aayushi.nainwal](https://forum.digikey.com/u/aayushi.nainwal)\ **Replies:** 0\ **Last updated:** [July 15, 2024, 12:03pm UTC](https://forum.digikey.com/t/alternative-for-kmd5a-relay-from-leach-corp/43206 "2024-07-15T12:03:55Z")
While we do not currently carry the KMD5A relay (28V/50Amp) from Leach Corp, we do offer similar relays from other manufacturers. Please review the datasheets for alternative relays to ensure they will meet your applica… --- ## [Hardware Included for Chassis Mount Resistors & Relays?](https://forum.digikey.com/t/hardware-included-for-chassis-mount-resistors-relays/42322)
**Author:** [@Ryan\_2724](https://forum.digikey.com/u/Ryan_2724)\ **Replies:** 0\ **Last updated:** [June 12, 2024, 5:00am UTC](https://forum.digikey.com/t/hardware-included-for-chassis-mount-resistors-relays/42322 "2024-06-12T05:00:00Z")
Mounting hardware and crimp connection terminals are typically not included with chassis mount resistors and chassis mount relays or contactors. Although rare, there are sometimes exceptions for included mounting har… --- ## [Enhancing Energy Efficiency Using PWM Drive for DC Relays](https://forum.digikey.com/t/enhancing-energy-efficiency-using-pwm-drive-for-dc-relays/41402)
**Author:** [@APDahlen](https://forum.digikey.com/u/APDahlen)\ **Replies:** 0\ **Last updated:** [May 17, 2024, 9:39pm UTC](https://forum.digikey.com/t/enhancing-energy-efficiency-using-pwm-drive-for-dc-relays/41402 "2024-05-17T21:39:51Z")
We can save energy using a Pulse Width Modulation (PWM) drive for DC control relays and contactors. The energy consumed by the relay may be easily cut in half with this simple technique. This article provides a brief int… --- ## [What is an Ice Cube Control Relay?](https://forum.digikey.com/t/what-is-an-ice-cube-control-relay/41245)
**Author:** [@APDahlen](https://forum.digikey.com/u/APDahlen)\ **Replies:** 0\ **Last updated:** [May 14, 2024, 6:53pm UTC](https://forum.digikey.com/t/what-is-an-ice-cube-control-relay/41245 "2024-05-14T18:53:33Z")
The term “ice cube” is an informal name for a variety of control relays typically found in industrial control and automation applications. Ice cube control relays are like little cubes of ice neatly organized in a contro… --- ## [IF a MOSFET and PCB relay reflow soldered, can the PCB conditions be applied?](https://forum.digikey.com/t/if-a-mosfet-and-pcb-relay-reflow-soldered-can-the-pcb-conditions-be-applied/33620)
**Author:** [@AaronRollens](https://forum.digikey.com/u/AaronRollens)\ **Replies:** 0\ **Last updated:** [July 31, 2023, 3:20pm UTC](https://forum.digikey.com/t/if-a-mosfet-and-pcb-relay-reflow-soldered-can-the-pcb-conditions-be-applied/33620 "2023-07-31T15:20:09Z")
Question: If a MOSFET relay and PCB relay will be mounted on a PCB by flow soldering, can the same conditions as PCB relays be applied? Answer: The conditions are different from those for relays for PCB. Perform solde… --- ## [What is the contact resistance capability of high-capacity power relays?](https://forum.digikey.com/t/what-is-the-contact-resistance-capability-of-high-capacity-power-relays/38856)
**Author:** [@AaronRollens](https://forum.digikey.com/u/AaronRollens)\ **Replies:** 0\ **Last updated:** [February 15, 2024, 6:34pm UTC](https://forum.digikey.com/t/what-is-the-contact-resistance-capability-of-high-capacity-power-relays/38856 "2024-02-15T18:34:44Z")
The increase in heat generated by the equipment becomes an issue when the capacity and the current of the application become higher. Heat generation shortens the life of equipment, requiring cooling mechanisms such as… --- ## [What types of holding voltage application circuits are recommended?](https://forum.digikey.com/t/what-types-of-holding-voltage-application-circuits-are-recommended/38827)
**Author:** [@AaronRollens](https://forum.digikey.com/u/AaronRollens)\ **Replies:** 0\ **Last updated:** [February 14, 2024, 10:46pm UTC](https://forum.digikey.com/t/what-types-of-holding-voltage-application-circuits-are-recommended/38827 "2024-02-14T22:46:23Z")
As explained in “02 How can coil power consumption be reduced?”, power consumption can be reduced by using a holding voltage for the coil. In addition, some relays must be used at holding voltage to maintain their rat… --- ## [How can I prevent reverse voltage in coils?](https://forum.digikey.com/t/how-can-i-prevent-reverse-voltage-in-coils/38824)
**Author:** [@AaronRollens](https://forum.digikey.com/u/AaronRollens)\ **Replies:** 0\ **Last updated:** [February 14, 2024, 8:59pm UTC](https://forum.digikey.com/t/how-can-i-prevent-reverse-voltage-in-coils/38824 "2024-02-14T20:59:34Z")
Counter electromotive voltage generated when the coil voltage of a relay is interrupted causes overvoltage to various elements in the circuit, resulting in malfunctions and breakdowns. Thus countermeasures to suppress… --- ## [Experiencing issues with the operation of the G6BK-1114P-US-DC5 Latching Relay?](https://forum.digikey.com/t/experiencing-issues-with-the-operation-of-the-g6bk-1114p-us-dc5-latching-relay/40983)
**Author:** [@aayushi.nainwal](https://forum.digikey.com/u/aayushi.nainwal)\ **Replies:** 0\ **Last updated:** [May 6, 2024, 11:18am UTC](https://forum.digikey.com/t/experiencing-issues-with-the-operation-of-the-g6bk-1114p-us-dc5-latching-relay/40983 "2024-05-06T11:18:05Z")
If you are experiencing any abnormalities in the operation of the G6BK-1114P-US-DC5 relay, please refer to the recommended operation method given below by Omron Electronics G6BK-1114P-US-DC5 is a latching relay, and 2 c… --- ## [릴레이 코일 전압 규격 이해하기](https://forum.digikey.com/t/topic/11843)
**Author:** [@Brian\_Lee](https://forum.digikey.com/u/Brian_Lee)\ **Replies:** 0\ **Last updated:** [February 3, 2021, 5:21am UTC](https://forum.digikey.com/t/topic/11843 "2021-02-03T05:21:12Z")
릴레이에 대해 공부할 때 이해하기 조금 까다로운 몇 가지 코일 전압 사양이 있습니다. 일반적으로 규격서에는 4가지 코일 전압 사양이 기재되어 있습니다. 릴레이 부품 Z2352-ND를 예로 들어 살펴보겠습니다. 이 릴레이는 접점 구성이 1A(상시 개방)로 되어 있는 SPST 논래칭 릴레이입니다. 코일 전압 또는 공칭 전압 - 12VDC - 코일을 작동시키기 위한 공칭 전압이 됩니다. 이 값은… --- ## [Relay identification for replacement part](https://forum.digikey.com/t/relay-identification-for-replacement-part/34190)
**Author:** [@Millwright](https://forum.digikey.com/u/Millwright)\ **Replies:** 4\ **Last updated:** [April 25, 2024, 5:08pm UTC](https://forum.digikey.com/t/relay-identification-for-replacement-part/34190 "2024-04-25T17:08:38Z")
I’m new to the forum, and searched for the numbers on this relay before asking. This is the bake broil relay for my oven. Maytag MODEL NUMBER CWE5800ACB. I’m having a tough time verifying the correct replacement part and… --- ## [How to test a power relay with a multimeter? (G7L-2A-TUB)](https://forum.digikey.com/t/how-to-test-a-power-relay-with-a-multimeter-g7l-2a-tub/19552)
**Author:** [@akozych2](https://forum.digikey.com/u/akozych2)\ **Replies:** 3\ **Last updated:** [April 14, 2022, 8:57am UTC](https://forum.digikey.com/t/how-to-test-a-power-relay-with-a-multimeter-g7l-2a-tub/19552 "2022-04-14T08:57:08Z")
The power relay is part of an electrical melting oven that I bought recently. --- ## [Relay pin pitch missing](https://forum.digikey.com/t/relay-pin-pitch-missing/39799)
**Author:** [@mmbordo](https://forum.digikey.com/u/mmbordo)\ **Replies:** 9\ **Last updated:** [March 28, 2024, 11:02pm UTC](https://forum.digikey.com/t/relay-pin-pitch-missing/39799 "2024-03-28T23:02:02Z")
\------Question for 7760056336 Please Put your question below------ the data sheet for the Weidmuller relay 7760056336 does not show the pin pitch. Pin pitch is the distance between the pins, center to center. Can you … --- ## [RGC1A60D62KGU single phase dc contactor, no continuity](https://forum.digikey.com/t/rgc1a60d62kgu-single-phase-dc-contactor-no-continuity/39549)
**Author:** [@phil.mccrary](https://forum.digikey.com/u/phil.mccrary)\ **Replies:** 3\ **Last updated:** [March 13, 2024, 4:21pm UTC](https://forum.digikey.com/t/rgc1a60d62kgu-single-phase-dc-contactor-no-continuity/39549 "2024-03-13T16:21:36Z")
\------Question for RGC1A60D62KGU Please Put your question below------ Im applying 24v+ to A2- and A1+ and getting no continuity on 1, L1 and 2, T1. --- ## [Explain to me the mechanism that interrupts the arc](https://forum.digikey.com/t/explain-to-me-the-mechanism-that-interrupts-the-arc/38850)
**Author:** [@AaronRollens](https://forum.digikey.com/u/AaronRollens)\ **Replies:** 0\ **Last updated:** [February 15, 2024, 6:29pm UTC](https://forum.digikey.com/t/explain-to-me-the-mechanism-that-interrupts-the-arc/38850 "2024-02-15T18:29:25Z")
Method of interrupting the arc using the contact gap Method of extending and interrupting the arc with a magnet Method of cooling and interrupting the arc with enclosed gas When turning off the switching device, in … --- ## [What is the effect of the magnetic field from permanent magnets in a relay?](https://forum.digikey.com/t/what-is-the-effect-of-the-magnetic-field-from-permanent-magnets-in-a-relay/38851)
**Author:** [@AaronRollens](https://forum.digikey.com/u/AaronRollens)\ **Replies:** 0\ **Last updated:** [February 15, 2024, 6:30pm UTC](https://forum.digikey.com/t/what-is-the-effect-of-the-magnetic-field-from-permanent-magnets-in-a-relay/38851 "2024-02-15T18:30:08Z")
G9KB-1A G7L-2A-X G5PZ-1A-X G2RG-2A-X Simulation-based magnetic field analysis predicts that a magnetic flux density can be reduced to several mT by moving the sensor approximately 20 mm away from the surface of the… --- ## [Can DC power relays be used with less than 1A?](https://forum.digikey.com/t/can-dc-power-relays-be-used-with-less-than-1a/38852)
**Author:** [@AaronRollens](https://forum.digikey.com/u/AaronRollens)\ **Replies:** 0\ **Last updated:** [February 15, 2024, 6:31pm UTC](https://forum.digikey.com/t/can-dc-power-relays-be-used-with-less-than-1a/38852 "2024-02-15T18:31:03Z")
Depending on the capacity range of the DC power relay, there are different things to pay attention to when using it. Let’s take a closer look at each model. For DC PCB power relay G7L-X/G5PZ-X The G7L-X c… --- ## [Can two relays be connected in series or parallel?](https://forum.digikey.com/t/can-two-relays-be-connected-in-series-or-parallel/38853)
**Author:** [@AaronRollens](https://forum.digikey.com/u/AaronRollens)\ **Replies:** 0\ **Last updated:** [February 15, 2024, 6:32pm UTC](https://forum.digikey.com/t/can-two-relays-be-connected-in-series-or-parallel/38853 "2024-02-15T18:32:22Z")
Partial voltage when relays are connected in series When used with a DC load, connecting relays in series divides the voltage in two and it may be possible to interrupt a larger voltage than with a single relay. Fo… --- ## [What happens to a relay when a large current (short-circuit current) is energized?](https://forum.digikey.com/t/what-happens-to-a-relay-when-a-large-current-short-circuit-current-is-energized/38855)
**Author:** [@AaronRollens](https://forum.digikey.com/u/AaronRollens)\ **Replies:** 0\ **Last updated:** [February 15, 2024, 6:33pm UTC](https://forum.digikey.com/t/what-happens-to-a-relay-when-a-large-current-short-circuit-current-is-energized/38855 "2024-02-15T18:33:58Z")
This section describes the behavior of a relay when a large current, such as a short-circuit current, flows through the relay. Depending on the magnitude of the current, three major phenomena occur. Current… --- ## [How can coil power consumption be reduced?](https://forum.digikey.com/t/how-can-coil-power-consumption-be-reduced/38825)
**Author:** [@AaronRollens](https://forum.digikey.com/u/AaronRollens)\ **Replies:** 0\ **Last updated:** [February 14, 2024, 10:09pm UTC](https://forum.digikey.com/t/how-can-coil-power-consumption-be-reduced/38825 "2024-02-14T22:09:35Z")
The coil of a relay consumes a certain amount of power in the ON state (voltage applied). That is, it continues to consume power during operation. In the case of applications in which it continues to be ON, the… --- ## [Easy-to-understand explanations of the unknowns when using high-capacity power relays](https://forum.digikey.com/t/easy-to-understand-explanations-of-the-unknowns-when-using-high-capacity-power-relays/38629)
**Author:** [@AaronRollens](https://forum.digikey.com/u/AaronRollens)\ **Replies:** 0\ **Last updated:** [February 7, 2024, 11:03pm UTC](https://forum.digikey.com/t/easy-to-understand-explanations-of-the-unknowns-when-using-high-capacity-power-relays/38629 "2024-02-07T23:03:27Z")
OMRON relays are used in a wide variety of products by our customers, and there are a wide range of design considerations, such as the counter electromotive voltage of coils, holding voltage, and the effects of magnetic … [Next page](https://forum.digikey.com/tag/relays/2188.md?match_all_tags=true&page=1&tags%5B%5D=relays)