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72. NPN Transistor for Relay Coil Driver

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MMBT3904-AU_R1_000A1
Component
DigiKey Part No3757-MMBT3904-AU_R1_000A1TR-ND
Mfr Part NoMMBT3904-AU_R1_000A1
ManufacturerPanjit International Inc.

TRANS NPN 40V 0.2A SOT-23

Bipolar (BJT) Transistor NPN 40 V 200 mA 300MHz 225 mW Surface Mount SOT-23

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EW

Response By EW AI

✅ Transistor Type: NPN, matches the required NPN low-side switch application.
✅ Current - Collector (Ic) (Max): 200 mA, meets the ≥200 mA requirement.
✅ Voltage - Collector Emitter Breakdown (Max): 40 V, exceeds the ≥30 V requirement.
✅ DC Current Gain (hFE) (Min): 100, meets the ≥80 requirement.
✅ Vce Saturation (Max): 300 mV, satisfies the ≤400 mV requirement.
✅ Power - Max: 225 mW, exceeds the ≥200 mW requirement.
✅ Mounting Type: Surface Mount, matches requirement.
✅ Package / Case: TO-236-3, SC-59, SOT-23-3, acceptable SOT-23 variant and matches requirement.
✅ Operating Temperature: -55°C to 150°C, exceeds the required -40°C to +125°C range.
✅ RoHS Compliance: ROHS3 Compliant, satisfies requirement.

All required specifications are satisfied. This component is approved for the 3.3 V MCU-driven 12 V relay low-side switch application.
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