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Nexperia USA Inc. BC857RAZ
- Part No.:
- BC857RAZ
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Bipolar Transistor Arrays
- Package:
- 6-XFDFN Exposed Pad
- Datasheet:
-
BC857RAZ.pdf
- Description:
- TRANS 2PNP 45V 100MA DFN1412-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,591
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Product details
Overview
BC857RA from Nexperia is a PNP/PNP general-purpose double transistor in a DFN1412-6 (SOT1268) package, rated for −45 V VCEO, −100 mA IC, and AEC-Q101 qualified for automotive use. It integrates two matched PNP transistors for compact dual-switching or differential amplification in space-constrained PCBs.
For engineers reviewing the BC857RA datasheet, BC857RA pinout, BC857RA application, or BC857RA equivalent, this device supports high-density routing in mobile power management, automotive sensor interfaces, and dual-channel bias networks where thermal efficiency and low profile (<0.5 mm height) are critical.
Technical Context
The BC857RA implements two electrically isolated PNP bipolar junction transistors sharing a common thermal substrate in a 6-terminal leadless DFN package. Each transistor exhibits hFE = 200–450 at −2 mA/−5 V, with VCEsat ≤ −300 mV at −100 mA/−5 mA drive and fT ≥ 100 MHz at −10 mA.
Its AEC-Q101 qualification confirms robustness across −55 °C to +150 °C ambient, supported by Rth(j-a) = 261 K/W (per device) on FR4 PCB. The pinout enables independent base control and emitter-collector routing for push-pull or current-mirror topologies without cross-coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V per transistor - supports rail-to-rail switching in 36 V automotive systems with margin |
| IC | −100 mA continuous - drives small relays, LED strings, or logic-level interface loads |
| hFE | 200–450 at −2 mA/−5 V - ensures stable DC bias in amplifier stages with low base current demand |
| VCEsat | ≤ −300 mV at −100 mA/−5 mA - minimizes conduction loss in high-efficiency switching nodes |
| fT | ≥ 100 MHz at −10 mA/−5 V - enables audio-frequency amplification and fast digital switching |
| Ptot | 480 mW per device on FR4 - allows dual-transistor operation without external heatsinking |
| Rth(j-a) | 261 K/W per device - enables thermal-aware layout with standard PCB copper area |
Pinout & Package
DFN1412-6 (SOT1268) is a 1.4 mm × 1.2 mm × 0.47 mm leadless surface-mount package with 6 terminals, 0.5 mm max height, and thermal-enhanced construction for improved power dissipation on FR4 PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Emitter of TR1 | Low-impedance output node for TR1; connects to load return or reference potential |
| 2 | Base of TR1 | Current-controlled input for TR1; requires series resistor for bias stability |
| 3 | Collector of TR2 | High-side switching node for TR2; ties to supply rail in common-emitter configuration |
| 4 | Emitter of TR2 | Output node for TR2; used for current sourcing or differential pair tail current |
| 5 | Base of TR2 | Independent control input for TR2; enables asynchronous or complementary drive |
| 6 | Collector of TR1 | Primary switching node for TR1; routed to load or feedback network |
Key Features
| Feature | Design Value |
|---|---|
| Dual PNP integration | Reduces board area by >40% vs. discrete SOT363 equivalents and eliminates matching drift between separate devices |
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control modules and body electronics |
| 0.5 mm profile | Enables stacking under connectors or beneath shields in ultra-thin mobile and wearables designs |
| Thermal-enhanced DFN | Delivers 480 mW total dissipation-32% higher than standard SOT363 packages at same footprint |
| Matched hFE tracking | Both transistors share identical process and layout, ensuring <±5% hFE mismatch over temperature |
Applications
| Automotive Door Module | Smartphone Power Sequencing |
|---|---|
Use Scenario: Controlling window lift motor direction and lock actuator timing in a single PCB assembly. IC Role / Device Role / Timing Role: Dual PNP switch providing isolated high-side enable paths for H-bridge drivers and solenoid coils. Use Value: Eliminates need for two separate SOT23 transistors, reducing BOM count and improving thermal coupling between switching elements. | Use Scenario: Sequencing power rails for application processor, modem, and display subsystems during cold boot. IC Role / Device Role / Timing Role: Dual PNP configured as active-low enable switches with independent base control for staggered voltage ramp-up. Use Value: Enables precise 10–100 ms delay between rail activations using RC networks on each base, without adding discrete timing ICs. |
| Industrial Sensor Signal Conditioning | USB-C Port Protection Circuit |
Use Scenario: Biasing dual op-amp inputs in a 4–20 mA transmitter while maintaining galvanic isolation. IC Role / Device Role / Timing Role: Current mirror reference element with matched hFE ensuring <0.5% gain error across −40 °C to +105 °C. Use Value: Replaces discrete matched transistor pairs, cutting calibration time and improving long-term drift performance. | Use Scenario: Enabling/disabling VCONN and CC line pull-up resistors based on cable orientation detection. IC Role / Device Role / Timing Role: Dual PNP acting as bidirectional enable switches for USB-C configuration channel termination networks. Use Value: Supports reversible plug insertion with sub-10 µs switching and <1 µA leakage in off-state, meeting USB-IF compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-PNP switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847RAPN | NPN/PNP complement; shares same package and pinout but mixed polarity | Required for level-shifting or complementary output stages, not direct replacement | Select when designing push-pull outputs or inverting/non-inverting signal paths simultaneously |
| ZXTD09N50DE6TA | 50 V VCEO, −500 mA IC, SOT-26 package; higher power but larger footprint and no AEC-Q101 rating | Suitable for industrial motor drivers but not automotive-qualified environments | Choose only if >100 mA current capability is mandatory and automotive qualification is not required |
Compared with BC857RA, BC847RAPN enables complementary switching in the same footprint but requires redesign of bias networks, while ZXTD09N50DE6TA delivers higher current at the cost of qualification and board area-neither offers drop-in compatibility.
Availability
BC857RA is available at Aetrix Electronics and suitable for automotive door modules, smartphone power sequencing, industrial sensor signal conditioning, and USB-C port protection circuits requiring stable component supply and AEC-Q101 compliance.
Supply support for BC857RA 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 and advanced packaging.
The BC857RA belongs to Nexperia's AEC-Q101-qualified general-purpose transistor family, engineered for space-constrained, thermally demanding applications in automotive and portable electronics where dual-device integration improves reliability and reduces assembly cost.
FAQ
What is the maximum allowable peak collector current for BC857RA?
The BC857RA supports a peak collector current (ICM) of −200 mA per transistor under single-pulse conditions with pulse width ≤ 1 ms, as defined in the Absolute Maximum Ratings table. This rating assumes proper PCB thermal design and does not imply continuous operation at that level.
Can BC857RA be used in linear amplification mode?
Yes-BC857RA is characterized for linear operation with hFE = 200–450 at −2 mA/−5 V and noise figure of 10 dB at 1 kHz, making it suitable for low-noise preamplifier stages and bias networks where gain stability and low distortion are required.
Is the DFN1412-6 package compatible with standard reflow soldering profiles?
Yes-the DFN1412-6 package is qualified for lead-free reflow soldering per J-STD-020. Nexperia provides a dedicated footprint (Fig. 10) with 0.71 mm solder land width and 0.35 mm stencil aperture, supporting peak temperatures up to 260 °C with controlled ramp rates.
How does the thermal resistance differ between per-transistor and per-device ratings?
Rth(j-a) is 385 K/W per transistor (isolated operation), but drops to 261 K/W per device when both transistors operate simultaneously on the same die-reflecting shared thermal mass and improved heat spreading across the DFN substrate and PCB copper.
BC857RAZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 6-XFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 2 PNP (Dual)
- Current - Collector (Ic) (Max):
- 100mA
- Voltage - Collector Emitter Breakdown (Max):
- 45V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 2mA, 5V
- Power - Max:
- 325mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DFN1412-6
BC857RAZ FAQ
1.How can I place an order for BC857RAZ through Aetrix?
Please submit a Request for Quotation (RFQ) for BC857RAZ 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 BC857RAZ reliable?
The price and inventory of BC857RAZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857RAZ is usually 5 days.
3.What payment methods are accepted for BC857RAZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857RAZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC857RAZ?
BC857RAZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC857RAZ 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 BC857RAZ?
For technical support, including BC857RAZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857RAZ requirements.
6.How does Aetrix verify that BC857RAZ is sourced from the original manufacturer or authorized distributors?
All BC857RAZ 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 BC857RAZ meets industry standards.
7.What is the process for return or replacement of BC857RAZ?
All BC857RAZ units undergo pre-shipment inspection (PSI). If there is an issue with BC857RAZ, 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 BC857RAZ part is unused and in its original packaging.
Return procedure for BC857RAZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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