# Transistor substitution 2SB1120-F/G

**URL:** <https://forum.digikey.com/t/transistor-substitution-2sb1120-f-g/6890>\
**Category:** Discrete Semiconductor Products\
**Tags:** cross-reference, transistors, onsemi\
**Created:** [June 13, 2020, 7:23pm UTC](https://forum.digikey.com/t/transistor-substitution-2sb1120-f-g/6890 "2020-06-13T19:23:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Zack\_parts](https://avatars.discourse-cdn.com/v4/letter/z/a9a28c/32.png) [@Zack\_parts](https://forum.digikey.com/u/Zack_parts)\
**Post date:** [June 13, 2020, 7:23pm UTC](https://forum.digikey.com/t/transistor-substitution-2sb1120-f-g/6890/1 "2020-06-13T19:23:47Z")

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Hi. I’m trying to source a transistor 2SB1120-F/G or equivalent. Digikey has a hit for 2SB1120 but not available. 2SB112 gave me more hits.

Does [https://www.digikey.com/product-detail/en/on-semiconductor/2SB1121S-TD-E/2SB1121S-TD-EOSCT-ND/9086337](https://www.digikey.com/product-detail/en/on-semiconductor/2SB1121S-TD-E/2SB1121S-TD-EOSCT-ND/9086337) seem to be about the same?

Thanks!  
Zack

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**Author:** ![Justin\_12003](https://avatars.discourse-cdn.com/v4/letter/j/f1d935/32.png) [@Justin\_12003](https://forum.digikey.com/u/Justin_12003)\
**Post date:** [June 15, 2020, 3:43pm UTC](https://forum.digikey.com/t/transistor-substitution-2sb1120-f-g/6890/2 "2020-06-15T15:43:02Z")

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Hi Zack\_parts. The following are the specifications I found in a Sanyo datasheet for the 2SB1120:

Current - Collector (Ic) (Max) - 2.5A  
Voltage - Collector Emitter Breakdown (Max) - 10V  
DC Current Gain (hFE) (Min) @ Ic, Vce - 100 @ 500mA, 2V  
Power - Max - 500mW  
Frequency - Transition - 250MHz

Due to the lower transition frequency (150MHz) and collector current (2A) of the 2SB1121, I would instead offer the 2SB1302 shown on the following link: [Click Here](https://www.digikey.com/en/products/filter/transistors-bipolar-bjt-single/276?s=N4IgTCBcDa4MoCECMBmADBAugGhAVilAAcolciTIk00BfWoA)

For a side-by-side parametric comparison of the 2SB1121 and 2SB1302, please take a look at the following link: [Click Here](https://www.digikey.com/en/products/filter/transistors-bipolar-bjt-single/276?s=N4IgTCBcDa4MoCECMSxIAQB91kUgzAAwQC6ANCAKxSgAOUSFt9kShhAvh0A)

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**Author:** ![Zack\_parts](https://avatars.discourse-cdn.com/v4/letter/z/a9a28c/32.png) [@Zack\_parts](https://forum.digikey.com/u/Zack_parts)\
**Post date:** [June 18, 2020, 5:18pm UTC](https://forum.digikey.com/t/transistor-substitution-2sb1120-f-g/6890/3 "2020-06-18T17:18:42Z")

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Great, thanks Justin!