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Infineon Technologies BC857CB5003XT
- Part No.:
- BC857CB5003XT
- Manufacturer:
- Infineon Technologies
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BC857CB5003XT.pdf
- Description:
- TRANS PNP 45V 0.1A PG-SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,527
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Product details
Overview
BC857CB5003XT from Nexperia is a PNP silicon small-signal transistor designed for audio-frequency input stages and driver circuits. It delivers high DC current gain (hFE = 420–520 at IC = 2 mA), low VCE(sat) (max 300 mV at IC = 10 mA/IB = 0.5 mA), and low noise (1–4 dB NF at 1 kHz), making it suitable for precision analog amplification in automotive sensor interfaces.
For engineers reviewing the BC857CB5003XT datasheet, BC857CB5003XT pinout, BC857CB5003XT application, or BC857CB5003XT equivalent, key selection criteria include verified hFE group C performance, SOT23 package thermal resistance (RthJS ≤ 240 K/W), AEC-Q101 qualification, and complementary NPN pairing with BC847C.
Technical Context
This PNP transistor operates in linear active and saturation modes, with guaranteed hFE spread across three gain groups (A/B/C) and validated low-noise behavior between 30 Hz–15 kHz. Its VCEO = 45 V and VCBO = 50 V support moderate-voltage biasing in discrete amplifier and switching driver topologies.
The device features low base-emitter on-voltage (VBE(ON) = 650–820 mV at IC = 10 mA), tight VCE(sat) control (≤300 mV), and fT = 250 MHz - enabling stable operation in both AF preamplifier stages and fast-switching digital interface drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 45 V - supports rail-to-rail signal swing up to ±22.5 V in split-supply amplifiers |
| hFE (IC = 2 mA) | 420–520 - enables high-gain, low-bias-current amplification without external feedback compensation |
| VCE(sat) | ≤300 mV @ IC/IB = 10 mA/0.5 mA - minimizes conduction loss in active-load switch applications |
| fT | 250 MHz - ensures stable gain down to audio band with margin for EMI filtering design |
| Noise Figure | 1–4 dB @ 1 kHz - meets SNR requirements for automotive cabin microphone preamps |
| RthJS | ≤240 K/W - allows 330 mW dissipation at TS ≤ 71 °C in standard PCB layouts |
Pinout & Package
BC857CB5003XT is housed in a RoHS-compliant SOT23 plastic surface-mount package (3-pin, 1.3 mm × 2.9 mm footprint), optimized for automated placement and reflow soldering in high-volume automotive electronics assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Current-controlled input node | Accepts forward-biased drive current to enable PNP conduction; requires series resistor for IB limiting |
| 2 (Emitter) | High-side current source terminal | Connected to positive supply rail in common-emitter configurations; sets reference for VBE bias |
| 3 (Collector) | Output current sink terminal | Delivers amplified load current to ground or low-impedance node; voltage swing limited by VCEO |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood temperature cycling (−40 °C to +150 °C junction) |
| Low-noise AF operation | 1–4 dB noise figure over 30 Hz–15 kHz band supports high-fidelity sensor signal conditioning |
| Gain-group C binning | Guaranteed hFE = 420–520 at IC = 2 mA enables predictable bias point setting in production |
| Complementary NPN pairing | Matches BC847C in gain, VCE(sat), and package - simplifies push-pull stage design |
Applications
| Automotive Cabin Microphone Preamp | Engine Control Unit (ECU) Signal Level Shifter |
|---|---|
Use Scenario: Amplifying weak differential signals from MEMS microphones in infotainment systems. IC Role / Device Role / Timing Role: PNP small-signal amplifier in common-emitter configuration with emitter degeneration. Use Value: Low 1–4 dB noise figure preserves SNR; hFE ≥420 ensures stable gain without trimming resistors. | Use Scenario: Converting 3.3 V logic outputs to 5 V-compatible levels for legacy sensor interfaces. IC Role / Device Role / Timing Role: Active pull-up level translator using PNP emitter-follower topology. Use Value: VCE(sat) ≤300 mV ensures <100 mV output droop at 10 mA load; AEC-Q101 rating guarantees reliability. |
| Industrial Temperature Sensor Interface | LED Driver Current Mirror Reference |
Use Scenario: Biasing platinum RTD bridges in 4–20 mA transmitter front-ends. IC Role / Device Role / Timing Role: Precision current source element in Wilson mirror configuration. Use Value: Tight hFE group C (420–520) reduces mirror ratio error to <2.5%; low VCE(sat) maintains headroom. | Use Scenario: Setting reference current for constant-current LED strings in dashboard backlighting. IC Role / Device Role / Timing Role: High-gain current mirror master transistor in discrete LED driver IC. Use Value: fT = 250 MHz ensures fast turn-on response; SOT23 footprint enables compact layout near LEDs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP small-signal transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC857BW | SOT323 package; RthJS ≤ 250 K/W; same hFE group C specs | Higher board density but lower power handling (250 mW vs. 330 mW) | Select when space-constrained PCB layout outweighs thermal margin needs |
| MMBT857 | Same SOT23 package; hFE = 250–500 (no group C guarantee); no AEC-Q101 certification | Cost-sensitive industrial designs where automotive qualification is not required | Choose only for non-automotive applications with relaxed reliability validation |
Compared with BC857BW and MMBT857, BC857CB5003XT uniquely combines AEC-Q101 qualification, guaranteed hFE group C performance, and full 330 mW power dissipation in SOT23 - making it the only option qualified for safety-critical automotive signal conditioning.
Availability
BC857CB5003XT is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial sensor interfaces, and LED driver reference circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BC857CB5003XT 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-grade components.
BC857CB5003XT belongs to Nexperia's BC856–BC860 PNP transistor family, engineered specifically for AEC-Q101-compliant audio-frequency amplification and driver functions in harsh-environment automotive modules.
FAQ
Is BC857CB5003XT pin-compatible with BC847C?
No - BC857CB5003XT is PNP while BC847C is NPN; they share identical SOT23 pinout (1=Base, 2=Emitter, 3=Collector) but opposite polarity. Direct substitution requires circuit topology revision, though they are complementary for push-pull stages.
What is the maximum continuous collector current for BC857CB5003XT?
The absolute maximum continuous collector current is 100 mA per datasheet Section 3. Derating applies above TS = 71 °C; at 100 °C soldering point temperature, usable IC drops to approximately 65 mA to maintain safe junction temperature.
Does BC857CB5003XT require external ESD protection in automotive applications?
No - the device incorporates built-in ESD protection rated to ±2 kV HBM per JESD22-A114, sufficient for typical automotive module assembly and operation. Additional TVS clamping is recommended only for direct battery-line interface or CAN bus coupling scenarios.
Can BC857CB5003XT be used in linear regulator pass transistors?
Yes - its VCEO = 45 V, low VCE(sat), and 150 °C Tj(max) support use as an external pass element in adjustable LDOs. However, thermal design must account for RthJS ≤ 240 K/W and ensure Tj stays below 130 °C under worst-case load and ambient conditions.
BC857CB5003XT 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:
- Discontinued at Digi-Key
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 45 V
- Vce Saturation (Max) @ Ib, Ic:
- 650mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 420 @ 2mA, 5V
- Power - Max:
- 330 mW
- Frequency - Transition:
- 250MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT23
BC857CB5003XT FAQ
1.How can I place an order for BC857CB5003XT through Aetrix?
Please submit a Request for Quotation (RFQ) for BC857CB5003XT 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 BC857CB5003XT reliable?
The price and inventory of BC857CB5003XT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857CB5003XT is usually 5 days.
3.What payment methods are accepted for BC857CB5003XT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857CB5003XT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC857CB5003XT?
BC857CB5003XT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC857CB5003XT 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 BC857CB5003XT?
For technical support, including BC857CB5003XT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857CB5003XT requirements.
6.How does Aetrix verify that BC857CB5003XT is sourced from the original manufacturer or authorized distributors?
All BC857CB5003XT 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 BC857CB5003XT meets industry standards.
7.What is the process for return or replacement of BC857CB5003XT?
All BC857CB5003XT units undergo pre-shipment inspection (PSI). If there is an issue with BC857CB5003XT, 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 BC857CB5003XT part is unused and in its original packaging.
Return procedure for BC857CB5003XT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC857CB5003XT Tags
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