# Baking Temperature and Duration for Bel Fuse LAN moduleS558-5999-U7-F

**URL:** <https://forum.digikey.com/t/baking-temperature-and-duration-for-bel-fuse-lan-modules558-5999-u7-f/61696>\
**Category:** Transformers\
**Tags:** bel-fuse, soldering, pulse-transformers, faqs\
**Created:** [October 30, 2025, 9:43am UTC](https://forum.digikey.com/t/baking-temperature-and-duration-for-bel-fuse-lan-modules558-5999-u7-f/61696 "2025-10-30T09:43:03Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![aayushi.nainwal](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/aayushi.nainwal/32/62803_2.png) [@aayushi.nainwal](https://forum.digikey.com/u/aayushi.nainwal)\
**Post date:** [October 30, 2025, 9:43am UTC](https://forum.digikey.com/t/baking-temperature-and-duration-for-bel-fuse-lan-modules558-5999-u7-f/61696/1 "2025-10-30T09:43:03Z")

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If you are looking for the baking temperature and duration for [Bel Fuse Inc.](https://www.digikey.com/en/supplier-centers/bel-fuse) LAN module **[S558-5999-U7-F](https://www.digikey.com/en/products/detail/bel-fuse-inc/S558-5999-U7-F/2108029?s=N4IgTCBcDaIMoFYEA4C0CCcXUFUDsqAYiALoC%252BQA)**, kindly note the manufacturer’s response:

> Please refer to the attached **J-STD-020D** standard.
> 
> - **Bake Temperature:** 125°C
> - **Duration:** 24 hours (typical for full moisture removal)

[JSTD020D-01.pdf](https://forum.digikey.com/uploads/short-url/hhSONQyhjs9FxnT2sZ3a1hkZ1rl.pdf) (114.4 KB)

> **Applicable Part Numbers**
>
> | DigiKey Part Number | Manufacturer Part Number |
> | --- | --- |
> | 5923-S558-5999-U7-FTR-ND,5923-S558-5999-U7-FCT-ND,5923-S558-5999-U7-FDKR-ND | S558-5999-U7-F |
> | 5923-S558-5999-Z5-FTR-ND,5923-S558-5999-Z5-FCT-ND,5923-S558-5999-Z5-FDKR-ND | S558-5999-Z5-F |
> | 5923-S558-5999-T5-FTR-ND,5923-S558-5999-T5-FCT-ND,5923-S558-5999-T5-FDKR-ND | S558-5999-T5-F |
> | 5923-S558-5999-AT-FTR-ND,5923-S558-5999-AT-FCT-ND,5923-S558-5999-AT-FDKR-ND | S558-5999-AT-F |
> | 5923-S558-5999-P3-FTR-ND,5923-S558-5999-P3-FCT-ND,5923-S558-5999-P3-FDKR-ND | S558-5999-P3-F |
> | 5923-S558-5999-AC-FTR-ND,5923-S558-5999-AC-FCT-ND,5923-S558-5999-AC-FDKR-ND | S558-5999-AC-F |
> | 5923-S558-5999-AZ-FTR-ND,5923-S558-5999-AZ-FCT-ND,5923-S558-5999-AZ-FDKR-ND | S558-5999-AZ-F |
> | 5923-S558-5999-BQ-FTR-ND,5923-S558-5999-BQ-FCT-ND,5923-S558-5999-BQ-FDKR-ND | S558-5999-BQ-F |
> | 5923-S558-5999-Q3-FTR-ND,5923-S558-5999-Q3-FCT-ND,5923-S558-5999-Q3-FDKR-ND | S558-5999-Q3-F |
> | 5923-S558-5999-W2-FTR-ND,5923-S558-5999-W2-FCT-ND,5923-S558-5999-W2-FDKR-ND | S558-5999-W2-F |
> | 5923-S558-5999-M8-FTR-ND,5923-S558-5999-M8-FCT-ND,5923-S558-5999-M8-FDKR-ND | S558-5999-M8-F |
> | 5923-S558-5999-Q9-FTR-ND,5923-S558-5999-Q9-FCT-ND,5923-S558-5999-Q9-FDKR-ND | S558-5999-Q9-F |
> | 5923-S558-5999-Q2-FTR-ND,5923-S558-5999-Q2-FCT-ND,5923-S558-5999-Q2-FDKR-ND | S558-5999-Q2-F |
> | 5923-S558-5999-J1-FTR-ND,5923-S558-5999-J1-FCT-ND,5923-S558-5999-J1-FDKR-ND | S558-5999-J1-F |
> | 5923-S558-5999-46-FTR-ND,5923-S558-5999-46-FCT-ND,5923-S558-5999-46-FDKR-ND | S558-5999-46-F |
> | 5923-S558-5999-T3-FTR-ND,5923-S558-5999-T3-FCT-ND,5923-S558-5999-T3-FDKR-ND | S558-5999-T3-F |
> | 5923-S558-5999-AM-FTR-ND,5923-S558-5999-AM-FCT-ND,5923-S558-5999-AM-FDKR-ND | S558-5999-AM-F |
> | 5923-S558-5999-AN-FTR-ND,5923-S558-5999-AN-FCT-ND | S558-5999-AN-F |
> | 5923-S558-5999-AR-FTR-ND,5923-S558-5999-AR-FCT-ND,5923-S558-5999-AR-FDKR-ND | S558-5999-AR-F |
> | 5923-S558-5999-T7-FTR-ND,5923-S558-5999-T7-FCT-ND,5923-S558-5999-T7-FDKR-ND | S558-5999-T7-F |
> | 5923-S558-5999-AB-FTR-ND,5923-S558-5999-AB-FCT-ND,5923-S558-5999-AB-FDKR-ND | S558-5999-AB-F |
> | 5923-S558-5999-AA-FTR-ND,5923-S558-5999-AA-FCT-ND,5923-S558-5999-AA-FDKR-ND | S558-5999-AA-F |
> | 507-S558-5999-DSTR-ND | S558-5999-DS |
> | 507-S558-5999-DUTR-ND | S558-5999-DU |
> | S558-5999-N3-F-ND | S558-5999-N3-F |
> | S558-5999-90-F-ND | S558-5999-90-F |
> | S558-5999-86-F-ND | S558-5999-86-F |
> | 507-1729-2-ND | S558-5999-G9-F |
> | S558-5999-A2-F-ND | S558-5999-A2-F |
> | S558-5999-T9-F-ND | S558-5999-T9-F |
> | S558-5999-BD-F-ND | S558-5999-BD-F |
> | S558-5999-K6-F-ND | S558-5999-K6-F |
> | 507-S558-5999-EDTR-ND | S558-5999-ED |
> | 507-S558-5999-ECTR-ND | S558-5999-EC |
> | 507-S558-5999-DYTR-ND | S558-5999-DY |
> | S558-5999-U5-F-ND | S558-5999-U5-F |
> | S558-5999-T4-F-ND | S558-5999-T4-F |
> | S558-5999B47-F-ND | S558-5999B47-F |
> | S558-5999B47-ND | S558-5999B47 |
> | 507-S558-5999-EF+43444:473TR-ND | S558-5999-EF+43444:473 |
> | 507-S558-5999-EATR-ND | S558-5999-EA |
> | 5923-S558-5999-AF-FTR-ND | S558-5999-AF-F |
> | S558-5999-DL-ND | S558-5999-DL |
> | S558-5999-Z3-F-ND | S558-5999-Z3-F |
> | S558-5999-CJ-ND | S558-5999-CJ |
> | 507-1472-2-ND | S558-5999-03-F |
> | S558-5999-BA-F-ND | S558-5999-BA-F |
> | S558-5999-K9-F-ND | S558-5999-K9-F |
> | S558-5999-Z6-F-ND | S558-5999-Z6-F |