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Infineon Technologies BCR505E6778HTSA1
- Part No.:
- BCR505E6778HTSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BCR505E6778HTSA1.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,759
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Product details
Overview
BCR505E6778HTSA1 from Infineon Technologies is an NPN silicon digital transistor with integrated bias resistors (R1 = 2.2 kΩ, R2 = 10 kΩ), rated for 50 V VCEO, 500 mA IC, and 330 mW Ptot at TS ≤ 79 °C, used in automotive signal switching and logic-level interface circuits per AEC-Q101 qualification.
For engineers reviewing the BCR505E6778HTSA1 datasheet, BCR505E6778HTSA1 pinout, BCR505E6778HTSA1 application, or BCR505E6778HTSA1 equivalent, key selection criteria include built-in resistor ratio (R1/R2 = 0.22), VCE(sat) ≤ 0.3 V at IC = 50 mA/IB = 2.5 mA, hFE ≥ 70, thermal resistance RthJS ≤ 215 K/W, and SOT23 package compatibility with high-density PCB layouts.
Technical Context
This digital transistor integrates two precision on-chip resistors to enable direct logic-level drive without external bias components. Its common-emitter configuration supports DC switching with guaranteed Vi(off) ≤ 1 V and Vi(on) ≤ 1.4 V across temperature.
The device operates with fT = 100 MHz at IC = 50 mA/VCE = 5 V, supporting fast edge transitions in automotive body control modules and LED driver enable paths while maintaining AEC-Q101 stress reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown under open-base conditions |
| IC | 500 mA - Continuous collector current rating defining maximum load switching capacity |
| Ptot | 330 mW at TS ≤ 79 °C - Total power dissipation limit for safe operation on standard FR-4 PCB |
| hFE | ≥70 at IC = 50 mA/VCE = 5 V - Minimum DC current gain ensuring reliable saturation with low base drive |
| VCE(sat) | ≤0.3 V at IC = 50 mA/IB = 2.5 mA - Low saturation voltage minimizing conduction loss in switching applications |
| R1/R2 | 0.22 - Fixed internal resistor ratio enabling predictable turn-on/turn-off thresholds |
| fT | 100 MHz - Transition frequency confirming suitability for >1 MHz digital signal routing |
Pinout & Package
SOT23 plastic surface-mount package with gull-wing leads, 1.3 mm pitch, 2.9 mm × 1.3 mm footprint, and 1.15 mm height; RoHS-compliant, Pb-free termination.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Input node connected to R1–R2 divider junction | Accepts logic-level input; internal R1 pulls up to VCC, R2 pulls down to emitter |
| 2 (Emitter) | Common reference terminal | Connected to ground or low-side return path; defines input reference for Vi(off)/Vi(on) |
| 3 (Collector) | Switched output terminal | Drives loads such as LEDs, relays, or gate inputs; sinks current when saturated |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias network | R1 = 2.2 kΩ ±30 %, R2 = 10 kΩ ±30 % - eliminates 2 external resistors, reducing BOM count and layout area |
| AEC-Q101 qualified | Qualified per stress test requirements for automotive electronics - enables use in under-hood and body control units |
| Low VCE(sat) | ≤0.3 V at rated IC/IB - reduces power loss by >40 % vs. discrete BJT + resistor solutions at 50 mA |
| Thermal robustness | RthJS ≤ 215 K/W - supports sustained 330 mW dissipation on standard 2-layer PCB without heatsink |
| High-speed switching | fT = 100 MHz - enables clean 10–20 ns rise/fall times in 3.3 V logic interfaces |
Applications
| Automotive Door Module Switching | LED Status Indicator Driver |
|---|---|
Use Scenario: Controlling window lift motor enable signals and mirror fold/unfold commands in door ECUs. IC Role / Device Role / Timing Role: NPN digital transistor acting as low-side switch for 12 V relay coils and solenoid drivers. Use Value: Built-in R1/R2 ensures consistent turn-on at 3.3 V MCU GPIO levels, eliminating need for level-shifting circuitry. | Use Scenario: Driving multi-color status LEDs on instrument clusters and center consoles. IC Role / Device Role / Timing Role: Constant-current sink switch regulating LED brightness via PWM at 1–10 kHz. Use Value: VCE(sat) ≤ 0.3 V minimizes voltage drop across transistor, preserving forward voltage margin for red/green/blue LEDs. |
| Body Control Unit Logic Interface | Industrial Sensor Signal Conditioning |
Use Scenario: Isolating CAN transceiver standby control lines from microcontroller I/O pins. IC Role / Device Role / Timing Role: Level translator and current amplifier between 3.3 V logic and 5 V/12 V subsystems. Use Value: Input threshold Vi(on) ≤ 1.4 V guarantees activation with 3.3 V CMOS outputs, even over temperature. | Use Scenario: Converting analog comparator outputs into clean digital signals for PLC input modules. IC Role / Device Role / Timing Role: Schmitt-trigger-compatible switch providing noise-immune digital output buffering. Use Value: Vi(off) ≤ 1 V and hFE ≥ 70 ensure stable off-state with <100 µA leakage, preventing false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN digital transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BCR505E6327HTSA1 | Same die, identical electrical specs; differs only in reel packaging (3,000 vs. 10,000 pcs/reel) and date code | No functional difference; suitable for same automotive and industrial designs | Select based on volume procurement needs and inventory alignment |
| BCR505WE6327HTSA1 | Same electrical specs but W-marked variant indicating wafer-level traceability per AEC-Q101 Annex G | Required for Tier-1 automotive programs mandating full wafer lot traceability | Specify when full process lot tracking is contractually required |
Compared with BCR505E6778HTSA1, the E6327 variant offers identical performance in smaller reels for prototyping, while the WE6327 adds wafer-level traceability for strict automotive audits-neither changes thermal, switching, or bias behavior.
Availability
BCR505E6778HTSA1 is available at Aetrix Electronics and suitable for automotive body control units, LED lighting systems, and industrial sensor interface modules requiring stable component supply and AEC-Q101 compliance.
Supply support for BCR505E6778HTSA1 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 ICs, and industrial control solutions, with global manufacturing and quality certification to ISO/TS 16949.
The BCR505 series belongs to Infineon's automotive-qualified digital transistor product line, designed specifically for replacing discrete BJT + resistor combinations in space-constrained, thermally demanding vehicle subsystems.
FAQ
What is the maximum operating temperature for continuous operation?
The BCR505E6778HTSA1 has a maximum junction temperature of 150 °C and is rated for continuous operation up to TS = 79 °C on standard PCBs. Derating begins above this solder-point temperature, with total power dissipation linearly decreasing to zero at 150 °C per the Ptot vs. TS curve in the datasheet.
Can this transistor replace a standard BJT like BC847 in existing designs?
Yes, but only if the circuit relies on external base bias resistors. The BCR505E6778HTSA1 integrates R1 and R2, so direct substitution requires removing those external resistors and verifying that the resulting Vi(on)/Vi(off) thresholds match system logic levels - especially critical in 3.3 V MCU interfaces.
Is the SOT23 package lead-free and RoHS compliant?
Yes, the BCR505E6778HTSA1 uses a Pb-free, RoHS-compliant SOT23 package with matte tin-plated leads. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and supports standard reflow profiles including IPC/JEDEC J-STD-020D.
Does this part support pulse operation beyond its DC ratings?
Yes, the datasheet provides permissible pulse load curves showing Ptot(max)/Ptot(DC) ratios up to 10× for pulse widths <100 µs at D = 0 duty cycle. At tp = 10 µs, it supports ~3.3 W peak power, provided average power remains within 330 mW limits.
BCR505E6778HTSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 2.2 kOhms
- Resistor - Emitter Base (R2):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 70 @ 50mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 2.5mA, 50mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- Frequency - Transition:
- 100 MHz
- Power - Max:
- 330 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT23
BCR505E6778HTSA1 FAQ
1.How can I place an order for BCR505E6778HTSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BCR505E6778HTSA1 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 BCR505E6778HTSA1 reliable?
The price and inventory of BCR505E6778HTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCR505E6778HTSA1 is usually 5 days.
3.What payment methods are accepted for BCR505E6778HTSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCR505E6778HTSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCR505E6778HTSA1?
BCR505E6778HTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCR505E6778HTSA1 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 BCR505E6778HTSA1?
For technical support, including BCR505E6778HTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCR505E6778HTSA1 requirements.
6.How does Aetrix verify that BCR505E6778HTSA1 is sourced from the original manufacturer or authorized distributors?
All BCR505E6778HTSA1 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 BCR505E6778HTSA1 meets industry standards.
7.What is the process for return or replacement of BCR505E6778HTSA1?
All BCR505E6778HTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BCR505E6778HTSA1, 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 BCR505E6778HTSA1 part is unused and in its original packaging.
Return procedure for BCR505E6778HTSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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