CNCHIPDEPOT Original Part
MJD31C
MJD31C NPN power BJT with 100V VCEO, 3A collector current, 1.25W power and TO-252-2L package.
Transistor PolarityNPN
Collector-Emitter Voltage (VCEO)100 V
Collector Current (IC)3 A
DC Current Gain (hFE)15–75 @ IC = 3 A, VCE = 4 V
Power Dissipation (PD)1.25 W
PackageTO-252-2L
Product Overview
The MJD31C is an NPN bipolar power transistor designed for general-purpose amplification and low-speed switching applications. It features a 100V collector-emitter voltage rating, 3A continuous collector current, and 1.25W power dissipation. Its current gain characteristics and moderate current capability make it suitable for discrete driver, linear amplification, and power-control circuits.
Packaged in a TO-252-2L surface-mount package, the MJD31C provides a compact power transistor solution for PCB-mounted designs. It is suitable for load switching, amplifier driver stages, relay and actuator control, and other medium-power applications requiring up to 100V voltage capability.
Specifications
Key electrical, package, and sourcing parameters for quick engineering review.
| Part Number | MJD31C |
| Brand | CNCHIPDEPOT |
| Package | TO-252-2L |
| Product Type | BJT |
| Transistor Polarity | NPN |
| Collector-Emitter Voltage (VCEO) | 100 V |
| Collector Current (IC) | 3 A |
| DC Current Gain (hFE) | 15–75 @ IC = 3 A, VCE = 4 V |
| Power Dissipation (PD) | 1.25 W |
| Collector-Emitter Saturation Voltage (VCE(sat)) | 1.2 V Max @ IC = 3 A, IB = 375 mA |
| Transition Frequency (fT) | 3 MHz Min @ IC = 500 mA, VCE = 10 V |
| Collector-Base Voltage (VCBO) | 100 V |
| Emitter-Base Voltage (VEBO) | 5 V |
| Collector Cutoff Current (ICES) | 20 µA Max @ VCE = 100 V, VEB = 0 V |
| Collector Cutoff Current (ICEO) | 50 µA Max @ VCE = 60 V, IB = 0 |
| Junction Temperature (TJ) | 150°C Max |
| Mounting Type | Surface Mount |
Cross Reference & Replacement Information
The following part numbers are commonly reviewed for replacement or compatibility matching. Always verify datasheet, package, pinout, and operating conditions before bulk purchase.
| Target Brand | Target MPN | Replace Type | Notes |
|---|---|---|---|
| ON Semiconductor | 2N3904 | General Purpose Alternative | NPN BJT, check voltage and current ratings for specific applications. |
| Rohm Semiconductor | 2SC1815 | Functional Equivalent | Check frequency response and switching speed for high-frequency use. |
| STMicroelectronics | BC547 | Similar Characteristics | NPN transistor, verify hFE and power dissipation. |
| Texas Instruments | PN2222A | Common Replacement | Confirm package type (TO-92) and pin configuration. |
Datasheet
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Typical Applications
- General-purpose power amplifier stages
- Low-speed NPN switching circuits
- Relay and actuator driver circuits
- Medium-current load control circuits
- Linear transistor driver stages
- Surface-mount power control circuits
Ordering & RFQ Information
- MOQ: Contact sales
- Lead Time: 3–7 working days for stock items
- Packaging: Reel / Tube / Tray depending on package
- Sample Availability: Available on request
- Mass Production Status: 50K+ pcs Stock / Mass Production
FAQ
Can this part replace my current model?
It may be suitable depending on your circuit requirements. Please verify datasheet, package, pinout, and test samples before bulk orders.
Can I request samples?
Yes. Please submit your RFQ with target quantity and application details.
Need this part or a compatible replacement?
Send us your target part number, BOM list, quantity, and technical requirements. CNCHIPDEPOT can help review replacement options and provide RFQ support.
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Component Testing Equipment
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Quality Inspection Lab
Quality inspection processes help verify component condition, specifications and production consistency before shipment.