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Infineon Technologies BCP 51-16 H6778
- Part No.:
- BCP 51-16 H6778
- Manufacturer:
- Infineon Technologies
- Category:
- Single Bipolar Transistors
- Package:
- SOT-143R
- Datasheet:
-
BCP 51-16 H6778.pdf
- Description:
- TRANS PNP 45V 1A PG-SOT-143R-3D
- Quantity:
- Payment:
- Shipping:
Inventory:8,736
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Product details
Overview
BCP 51-16 H6778 from Infineon Technologies is a PNP silicon bipolar junction transistor designed for audio-frequency driver and output stages. It features a 45 V collector-emitter breakdown voltage (V(BR)CEO), 1 A continuous collector current (IC), 0.5 V collector-emitter saturation voltage (VCE(sat)) at IC = 500 mA / IB = 50 mA, DC current gain (hFE) of 100–250 at IC = 150 mA, and SOT223 surface-mount package. It is used in automotive amplifier bias networks and industrial linear regulator pass elements.
For engineers reviewing the BCP 51-16 H6778 datasheet, BCP 51-16 H6778 pinout, BCP 51-16 H6778 application, or BCP 51-16 H6778 equivalent, this page delivers verified electrical parameters, thermal resistance (RthJS ≤ 15 K/W), complementary NPN pairing (BCP54–BCP56), RoHS-compliant packaging, and AEC-Q101 qualification status - all critical for automotive-grade analog design validation.
Technical Context
This PNP transistor operates in linear and saturated switching modes with guaranteed hFE ≥ 100 at IC = 150 mA and VCE = 2 V, and supports pulse operation up to ICM = 1.5 A (tp ≤ 10 ms). Its low VCE(sat) of ≤0.5 V at high drive current enables efficient power stage conduction with minimal thermal overhead.
The device is thermally rated for Tj = 150 °C and exhibits RthJS ≤ 15 K/W, enabling stable operation on standard PCB copper areas without forced cooling. Its complementary NPN counterparts (BCP54–BCP56) share identical SOT223 footprint and thermal profile for push-pull stage design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V(BR)CEO | 45 V - Maximum safe collector-emitter voltage before avalanche breakdown under open-base condition |
| IC | 1 A - Continuous DC collector current rating at TS ≤ 120 °C, defining usable linear/saturation range |
| VCE(sat) | ≤0.5 V @ IC=500 mA, IB=50 mA - Low saturation voltage minimizes power loss in switching applications |
| hFE | 100–250 @ IC=150 mA, VCE=2 V - Confirmed DC current gain range for predictable base drive sizing |
| fT | 125 MHz @ IC=50 mA, VCE=10 V - Transition frequency confirms suitability for AF and low-MHz signal amplification |
| RthJS | ≤15 K/W - Thermal resistance from junction to soldering point, enabling thermal design with standard PCB copper |
| Ptot | 2 W @ TS ≤ 120 °C - Total power dissipation limit under specified heatsink temperature condition |
Pinout & Package
SOT223 package with 4-terminal configuration: three active pins (B, C, E) plus an exposed collector tab (Pin 4) serving as both electrical connection and primary thermal path. The package meets RoHS requirements and is qualified per AEC-Q101 for automotive use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Base (B) | Control terminal; requires current-limited drive to achieve target hFE-based collector current |
| Pin 2 | Collector (C) | Main current sink; electrically and thermally connected to exposed metal tab (Pin 4) |
| Pin 3 | Emitter (E) | Current source reference node; tied to system ground or negative rail in common-emitter configurations |
| Pin 4 | Collector Tab | Low-impedance thermal and electrical extension of Pin 2; must be soldered to large copper pour for RthJS compliance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTSL, TC, AC/DC life tests |
| Low VCE(sat) | ≤0.5 V ensures <125 mW conduction loss at 500 mA, reducing thermal load in Class-AB output stages |
| High hFE consistency | 100–250 range at 150 mA enables stable biasing without individual transistor binning |
| Complementary NPN pairing | Direct match with BCP54–BCP56 series for symmetrical push-pull amplifier designs |
| SOT223 thermal performance | RthJS ≤15 K/W allows >1.5 W dissipation on 25 mm² 2-oz copper, eliminating need for external heatsinks |
Applications
| Automotive Audio Amplifier Output Stage | Industrial Linear Voltage Regulator Pass Element |
|---|---|
Use Scenario: Final output pair in 20 W car radio amplifier driving 4 Ω speaker load. IC Role / Device Role / Timing Role: PNP complement in Class-AB push-pull emitter-follower configuration. Use Value: Low VCE(sat) reduces crossover distortion and improves thermal stability across -40 °C to +125 °C ambient. | Use Scenario: Series pass transistor in adjustable 3 A linear regulator powering MCU subsystems. IC Role / Device Role / Timing Role: High-current, low-dropout pass element controlling output voltage via feedback loop. Use Value: 1 A IC rating and 2 W Ptot support 3 A × 1.5 V dropout = 4.5 W dissipation with proper PCB copper layout. |
| LED Driver Current Sink | Power Supply Enable Switch |
Use Scenario: Constant-current sink for high-brightness automotive LED clusters (e.g., DRL, tail lamps). IC Role / Device Role / Timing Role: Saturated switch regulating LED current via base-controlled IC. Use Value: Guaranteed hFE ≥100 ensures precise current setting with ±5% tolerance using standard resistor-based base drive. | Use Scenario: High-side enable switch controlling 12 V rail to infotainment sub-system. IC Role / Device Role / Timing Role: PNP-based high-side switch activated by microcontroller GPIO. Use Value: 45 V V(BR)CEO provides 2× margin over 12 V automotive supply, supporting load dump transients up to 24 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP bipolar transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BCP52-16 | Higher V(BR)CEO = 60 V; otherwise identical pinout, gain, and thermal specs | Preferred where system transients exceed 45 V (e.g., 24 V industrial control) | Select when higher voltage margin is required without changing layout or drive circuitry |
| BCP53-16 | V(BR)CEO = 80 V; hFE min = 63 at IC = 150 mA (vs. 100 for BCP51-16) | Suitable for 48 V telecom or battery-powered equipment requiring extended breakdown headroom | Choose only if 80 V rating is mandatory; verify hFE meets minimum gain requirement in target bias point |
Compared with BCP52-16 and BCP53-16, the BCP51-16 offers optimal balance of voltage rating, gain, and thermal performance for 12 V automotive audio and power management - avoiding unnecessary over-spec while maintaining AEC-Q101 compliance and SOT223 compatibility.
Availability
BCP 51-16 H6778 is available at Aetrix Electronics and suitable for automotive audio amplifiers, industrial linear regulators, LED current sinks, and power supply enable switches requiring stable component supply across production lifecycles.
Supply support for BCP 51-16 H6778 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs and discrete devices.
The BCP51–BCP53 family belongs to Infineon's automotive-qualified bipolar transistor product line, engineered specifically for high-reliability linear and switching applications in harsh environments - including engine control units, body electronics, and infotainment systems.
FAQ
Is BCP 51-16 H6778 pin-compatible with BCP54–BCP56 NPN transistors?
Yes - BCP51-16 shares identical SOT223 pinout (B-C-E-Tab) and mechanical footprint with BCP54–BCP56, enabling direct complementary placement in push-pull or differential pair layouts. Electrical polarity differs, but PCB land pattern, thermal pad connection, and mounting process are fully interchangeable.
What is the maximum allowable base current for continuous operation?
The absolute maximum DC base current (IB) is 100 mA per datasheet. For reliable long-term operation, design base drive to maintain IB ≤ 50 mA at peak IC, ensuring junction temperature remains within 150 °C limit and avoiding secondary breakdown under sustained saturation.
Does BCP 51-16 H6778 require derating above 25°C ambient?
Yes - total power dissipation must be linearly derated above TS = 120 °C, with Ptot decreasing by 16.7 mW/°C beyond that point. At TS = 150 °C, maximum allowable Ptot drops to zero. Derating curves are provided in Figure 5 of the official Infineon datasheet (Edition 2009-11-16).
Can BCP 51-16 H6778 be used in switching power supplies?
It is not optimized for high-frequency SMPS due to fT = 125 MHz and lack of specified switching times. However, it can serve in low-frequency (<100 kHz), high-current auxiliary switches or OR-ing diode replacements where low VCE(sat) and robust SOA are prioritized over speed.
BCP 51-16 H6778 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- SOT-143R
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 150mA, 2V
- Power - Max:
- 2 W
- Frequency - Transition:
- 125MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT-143R-3D
BCP 51-16 H6778 FAQ
1.How can I place an order for BCP 51-16 H6778 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCP 51-16 H6778 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BCP 51-16 H6778 reliable?
The price and inventory of BCP 51-16 H6778 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCP 51-16 H6778 is usually 5 days.
3.What payment methods are accepted for BCP 51-16 H6778?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCP 51-16 H6778 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCP 51-16 H6778?
BCP 51-16 H6778 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCP 51-16 H6778 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BCP 51-16 H6778?
For technical support, including BCP 51-16 H6778 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCP 51-16 H6778 requirements.
6.How does Aetrix verify that BCP 51-16 H6778 is sourced from the original manufacturer or authorized distributors?
All BCP 51-16 H6778 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BCP 51-16 H6778 meets industry standards.
7.What is the process for return or replacement of BCP 51-16 H6778?
All BCP 51-16 H6778 units undergo pre-shipment inspection (PSI). If there is an issue with BCP 51-16 H6778, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BCP 51-16 H6778 part is unused and in its original packaging.
Return procedure for BCP 51-16 H6778:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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