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Nexperia USA Inc. BC857BSHF
- Part No.:
- BC857BSHF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Bipolar Transistor Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BC857BSHF.pdf
- Description:
- TRANS 2PNP 45V 100MA 6-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,233
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Product details
Overview
BC857BSHF from Nexperia is a PNP/PNP general-purpose double transistor in SOT363 (SC-88) package, rated for −45 V VCEO, −100 mA IC, and 200–450 hFE per transistor, designed for space-constrained dual-switching or amplification circuits in industrial signal conditioning and power management subsystems.
For engineers reviewing the BC857BSHF datasheet, BC857BSHF pinout, BC857BSHF application, or BC857BSHF equivalent, this device supports matched-pair biasing, high-temperature operation up to 175 °C, low mutual interference, and compact dual-transistor integration-key for analog front-ends, level-shifting logic interfaces, and redundant sensing nodes.
Technical Context
This dual PNP transistor integrates two electrically isolated, closely matched gain transistors in a single TSSOP6 package. Each transistor delivers −45 V VCEO, −100 mA continuous IC, and hFE of 200–450 at −2 mA IC, with VCEsat as low as −200 mV at −100 mA/−5 mA drive.
Thermal design is supported by Rth(j-a) = 375 K/W (per device on FR4 PCB) and guaranteed operation from −55 °C to +175 °C ambient. Its 1.8 pF collector capacitance and 100 MHz fT enable stable performance in low-noise, medium-speed switching applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V: Maximum safe collector-emitter voltage per transistor under open-base conditions. |
| IC | −100 mA: Continuous DC collector current per transistor without thermal derating. |
| hFE | 200–450: DC current gain range at −5 V VCE, −2 mA IC, enabling precise bias control. |
| VCEsat | −200 mV max at −100 mA/−5 mA: Low saturation voltage ensures minimal conduction loss in switching mode. |
| Cc | 1.8 pF typical at −10 V VCB: Low collector capacitance preserves bandwidth in high-frequency amplifier stages. |
| Tj max | 175 °C: Junction temperature rating allows reliable operation in sealed enclosures or near heat sources. |
| Ptot (device) | 400 mW at Tamb ≤ 25 °C: Total dissipation limit for both transistors on standard FR4 PCB. |
Pinout & Package
SOT363 (TSSOP6) plastic surface-mount package: 2.1 mm × 1.25 mm × 0.95 mm body, 0.65 mm lead pitch, 6-pin symmetrical layout with index mark on Pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | E1 | Emitter of Transistor 1 - referenced to common ground or negative rail in PNP switching configurations. |
| 2 | B1 | Base of Transistor 1 - controls conduction of TR1; requires current-limiting resistor for biasing. |
| 3 | C2 | Collector of Transistor 2 - connects to load or supply rail; shares package thermal path with TR1. |
| 4 | E2 | Emitter of Transistor 2 - independent node; enables dual-channel isolation without shared emitter paths. |
| 5 | B2 | Base of Transistor 2 - fully decoupled from B1; supports independent or complementary drive schemes. |
| 6 | C1 | Collector of Transistor 1 - primary output node for TR1; paired with C2 for mirrored load switching. |
Key Features
| Feature | Design Value |
|---|---|
| Closely matched hFE | Both transistors exhibit tightly correlated DC current gain across production lots, simplifying differential pair or current mirror design. |
| No mutual interference | Electrically isolated die structure prevents crosstalk between TR1 and TR2, critical for noise-sensitive analog signal paths. |
| Low VCEsat | −200 mV max at full rated current enables efficient low-voltage PNP switching in 3.3 V or 5 V systems. |
| High-temperature operation | Rated for continuous use up to +175 °C ambient, supporting deployment in motor control housings and automotive under-hood modules. |
| Space reduction | Replaces two discrete SOT23 PNP transistors, saving >40% board area and reducing assembly steps in high-volume PCBs. |
Applications
| Industrial Sensor Signal Conditioning | Redundant Power Switching Node |
|---|---|
|
Use Scenario: Amplifying low-level thermocouple or bridge sensor outputs in programmable logic controllers. IC Role / Device Role / Timing Role: Dual PNP pair configured as matched current mirrors and active loads in precision op-amp input stages. Use Value: Tight hFE matching and low base-emitter voltage drift (−2 mV/K) maintain gain stability over −40 °C to +100 °C operating range. |
Use Scenario: Providing fail-safe 12 V load switching in industrial HMIs with dual-path redundancy. IC Role / Device Role / Timing Role: Two independent PNP switches driving parallel MOSFET gates or relay coils with separate enable signals. Use Value: Electrical isolation between transistors eliminates single-point failure; −45 V rating supports 24 V system headroom. |
| Level-Shifting Logic Interface | Compact Analog Front-End |
|
Use Scenario: Converting 3.3 V microcontroller GPIO outputs to −5 V logic levels for legacy analog IC control. IC Role / Device Role / Timing Role: Dual emitter-follower configuration providing bidirectional voltage translation with minimal propagation delay. Use Value: Low collector capacitance (1.8 pF) and 100 MHz fT preserve signal integrity up to 10 MHz edge rates. |
Use Scenario: Biasing photodiode transimpedance amplifiers and multiplexed analog multiplexer drivers. IC Role / Device Role / Timing Role: One transistor serves as active load, the other as current source in a low-noise, low-drift front-end stage. Use Value: NF = 3.3 dB at 1 kHz and low ICBO (<5 µA at 150 °C) ensure stable DC offset and minimal leakage-induced error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual PNP transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC857BPNH | NPN/PNP complementary pair instead of PNP/PNP; different polarity pairing limits direct substitution in same-bias designs. | Used where one channel requires NPN switching (e.g., high-side driver + low-side switch combo). | Select only when mixed-polarity operation is required; not drop-in for BC857BSHF's dual-PNP topology. |
| MBT3906DW1T1G | Same PNP/PNP configuration but higher VCEO (−40 V), lower hFE (100–300), and larger SOT363 footprint tolerance (2.2 mm × 1.35 mm vs. 2.1 mm × 1.25 mm). | Preferred in cost-sensitive consumer applications where tighter gain matching is not critical. | Acceptable for non-matched dual switching; avoid where hFE correlation or thermal coupling matters. |
Compared with BC857BPNH and MBT3906DW1T1G, BC857BSHF offers superior hFE matching, lower VCEsat, and tighter thermal coupling-making it optimal for precision analog pairing and high-reliability industrial switching where consistency across temperature and process variation is essential.
Availability
BC857BSHF is available at Aetrix Electronics and suitable for industrial sensor interfaces, redundant power switching nodes, and compact analog front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BC857BSHF 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-qualified and industrial-grade components.
BC857BSHF belongs to Nexperia's general-purpose bipolar transistor family, engineered for space-efficient dual-transistor integration in industrial automation, power management, and signal conditioning applications.
FAQ
What is the maximum junction temperature and how does it affect PCB layout?
The BC857BSHF has a maximum junction temperature of 175 °C and a per-device thermal resistance of 375 K/W on standard FR4. To sustain continuous operation near this limit, designers must provide ≥10 mm² of 35 µm copper pour connected to Pins 3 and 6 (collectors), avoid enclosing the device under conformal coating, and verify local board temperature with IR imaging during thermal validation.
Can BC857BSHF replace two discrete BC857B transistors in an existing design?
Yes-BC857BSHF matches the electrical specifications of individual BC857B transistors (−45 V VCEO, −100 mA IC, hFE 200–450) and uses the same SOT363 footprint. However, pin assignments differ: BC857B uses SOT23 (3-pin), while BC857BSHF's 6-pin layout requires updated PCB routing and may alter parasitic coupling in high-frequency layouts.
How does the "closely matched current gain" specification impact circuit performance?
Closely matched hFE means both transistors in the BC857BSHF exhibit nearly identical DC current gain across manufacturing lots and temperature (±5% typical spread at 25 °C). This directly improves accuracy in current mirrors, differential amplifiers, and active load configurations-reducing output offset drift by up to 60% versus unmatched discrete pairs.
Is BC857BSHF suitable for automotive applications?
No-BC857BSHF is not AEC-Q101 qualified and lacks automotive-specific testing or qualification documentation. While its 175 °C rating meets under-hood temperature requirements, Nexperia explicitly states in its legal disclaimers that non-automotive-qualified products are unsuitable for safety-critical or life-support systems, including automotive ECUs or ADAS modules.
BC857BSHF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- 270mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSSOP
BC857BSHF FAQ
1.How can I place an order for BC857BSHF through Aetrix?
Please submit a Request for Quotation (RFQ) for BC857BSHF 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 BC857BSHF reliable?
The price and inventory of BC857BSHF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857BSHF is usually 5 days.
3.What payment methods are accepted for BC857BSHF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857BSHF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC857BSHF?
BC857BSHF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC857BSHF 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 BC857BSHF?
For technical support, including BC857BSHF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857BSHF requirements.
6.How does Aetrix verify that BC857BSHF is sourced from the original manufacturer or authorized distributors?
All BC857BSHF 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 BC857BSHF meets industry standards.
7.What is the process for return or replacement of BC857BSHF?
All BC857BSHF units undergo pre-shipment inspection (PSI). If there is an issue with BC857BSHF, 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 BC857BSHF part is unused and in its original packaging.
Return procedure for BC857BSHF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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