STFN42
TRANS NPN 400V 1A SOT-89
Transistors Bipolar Bjt Single
TO-243AA
Obsolete
Price available on request
MOQ: 1 pcs
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Parameters
| Parameter | Value |
|---|---|
| Brand | STMicroelectronics |
| Model | STFN42 |
| Package / Case | TO-243AA |
| Mounting Type | Surface Mount |
| Operating Temperature | 150°C (TJ) |
| Power Dissipation (Max) | 1.4 W |
| Supplier Device Package | SOT-89-3 |
| RoHS | RoHS |
| Part Status | Obsolete |
Application & Notes
STFN42 by STMicroelectronics is an N-channel power MOSFET rated at N/A / N/A, commonly used in DC-DC converters, motor drivers, power supplies, and battery protection circuits. The TO-243AA package offers good thermal performance for SMT mounting. Key spec: Rds(on) max N/A. Select gate driver voltage carefully — logic-level variants exist for direct MCU drive.
📖 Technical Guides for STFN42
Alternatives & Replacements
View All →2SD1628F-TD-E
TRANS NPN 20V 5A PCP
2SD1623T-TD-E
TRANS NPN 50V 2A PCP
FCX458TA
TRANS NPN 400V 0.225A SOT-89
BCV28H6327XTSA1
TRANSISTOR AF SOT89-4
DXT5551-13
TRANS NPN 160V 0.6A SOT89-3
BCX56,135
NOW NEXPERIA BCX56 - SMALL SIGNA
All Technical Specifications
| Power - Max | 1.4 W |
| Transistor Type | NPN |
| Vce Saturation (Max) @ Ib, Ic | 1.5V @ 250mA, 750mA |
| Current - Collector (Ic) (Max) | 1 A |
| Current - Collector Cutoff (Max) | 100µA |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 10 @ 400mA, 5V |
| Voltage - Collector Emitter Breakdown (Max) | 400 V |
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