CNCHIPDEPOT Original Part
MMBTA56
MMBTA56 PNP BJT transistor with 80V VCEO, 500mA collector current, 350mW power and SOT-23 package.
Transistor PolarityPNP
Collector-Emitter Voltage (VCEO)80 V
Collector Current (IC)500 mA
DC Current Gain (hFE)100 Min @ IC = -100 mA, VCE = -1 V
Power Dissipation (PD)350 mW
PackageSOT-23
Product Overview
The MMBTA56 is a PNP bipolar junction transistor designed for general-purpose switching, driver, and small-signal amplification applications. It features an 80V collector-emitter voltage rating, 500mA maximum collector current, and a minimum DC current gain of 100 at 100mA collector current. Its moderate voltage capability and low saturation voltage make it suitable for compact control, interface, and high-side switching circuits.
Packaged in a SOT-23 surface-mount package, the MMBTA56 is well suited to space-constrained PCB designs. It can be used in PNP driver stages, signal amplification, complementary transistor circuits, and low-current load control where a higher voltage rating than typical low-voltage small-signal devices is required.
Specifications
Key electrical, package, and sourcing parameters for quick engineering review.
| Part Number | MMBTA56 |
| Brand | CNCHIPDEPOT |
| Package | SOT-23 |
| Product Type | BJT |
| Transistor Polarity | PNP |
| Collector-Emitter Voltage (VCEO) | 80 V |
| Collector Current (IC) | 500 mA |
| DC Current Gain (hFE) | 100 Min @ IC = -100 mA, VCE = -1 V |
| Power Dissipation (PD) | 350 mW |
| Collector-Emitter Saturation Voltage (VCE(sat)) | 0.2 V Max (Magnitude) @ IC = -100 mA, IB = -10 mA |
| Transition Frequency (fT) | 50 MHz |
| Operating Temperature | -55°C to +150°C (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | TO-236-3 / SC-59 / SOT-23-3 |
| Collector Cutoff Current | 100 nA Max |
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 | 2N3906 | Possible Replacement | PNP BJT, check voltage and current ratings. |
| Fairchild Semiconductor | BC557 | Cross Reference | Verify package (TO-92) and hFE parameters. |
| STMicroelectronics | MMBT56 | Direct Replacement | Same MPN prefix, confirm datasheet specifications. |
| Diodes Incorporated | MMBTA56 | Compatible Alternative | Check for identical electrical characteristics. |
Datasheet
Download the datasheet or contact us for additional technical information.
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Typical Applications
- PNP high-side switching circuits
- General-purpose signal amplification
- Complementary NPN/PNP driver stages
- Low-current load switching circuits
- LED and indicator control circuits
- Compact surface-mount 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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SMT Assembly Workshop
SMT production and assembly capabilities supporting electronic component and PCB-related manufacturing requirements.
Semiconductor Production
Controlled production environments supporting semiconductor and electronic component manufacturing processes.
Component Testing Equipment
Electrical testing and verification equipment used to support performance checks and product consistency.
Quality Inspection Lab
Quality inspection processes help verify component condition, specifications and production consistency before shipment.