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Nexperia USA Inc. BC857BS,115
- Part No.:
- BC857BS,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Bipolar Transistor Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BC857BS,115.pdf
- Description:
- TRANS 2PNP 45V 100MA 6-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:119,802
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Product details
Overview
BC857BS,115 from Nexperia is a PNP general-purpose double transistor in SOT363-3 (SC-88) package, featuring two matched PNP transistors with VCEO = −45 V, IC = −100 mA per transistor, and hFE = 200–450 at −2 mA/−5 V; used for compact dual-channel switching and amplification in space-constrained analog and logic interface circuits.
For engineers reviewing the BC857BS,115 datasheet, BC857BS,115 pinout, BC857BS,115 application, or BC857BS,115 equivalent, this page delivers verified electrical parameters, validated dual-transistor pin mapping, thermal derating curves, and direct alternatives for board-level component consolidation and BOM optimization.
Technical Context
This dual PNP transistor integrates two electrically isolated, closely matched gain transistors in a single TSSOP6 package-no mutual interference between TR1 and TR2 ensures independent biasing and switching control. Each transistor supports VCEO = −45 V, VCBO = −50 V, and operates up to Tj = 150 °C.
It delivers low VCEsat = −400 mV at −100 mA/−5 mA drive and low Cc = 2.2 pF at −10 V, enabling high-speed switching and stable small-signal amplification in rail-to-rail negative-supply configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −45 V per transistor: supports reliable switching in −12 V to −36 V industrial supply rails without breakdown. |
| IC | −100 mA per transistor: sufficient for driving LEDs, relays, and logic-level shifters in compact consumer and IoT nodes. |
| hFE | 200–450 at −2 mA/−5 V: enables precise current mirror design and stable DC biasing across temperature. |
| VCEsat | −400 mV max at −100 mA/−5 mA: minimizes conduction loss and self-heating in high-duty-cycle switching. |
| Cc | 2.2 pF at −10 V: reduces Miller effect and preserves bandwidth in audio preamp and signal routing stages. |
| Ptot (per device) | 300 mW on FR4 PCB: allows dual-transistor operation within thermal limits without heatsinking in standard layouts. |
| fT | 100 MHz at −10 mA/−5 V: supports RF front-end buffering and fast digital signal conditioning up to ~10 MHz. |
Pinout & Package
SOT363-3 (TSSOP6) plastic surface-mount package: 2.2 mm × 1.35 mm footprint, 0.65 mm pitch, 0.95 mm max height; optimized for reflow soldering with defined solder paste stencil (0.5 mm × 0.5 mm pads, 4× per side).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | E1 | Emitter of Transistor 1: common reference node for TR1's current path; connects to most negative potential in PNP configuration. |
| 2 | B1 | Base of Transistor 1: controls TR1 conduction; requires negative bias relative to E1 to turn on. |
| 3 | C2 | Collector of Transistor 2: output node for TR2; sinks current when TR2 is active in common-emitter mode. |
| 4 | E2 | Emitter of Transistor 2: independent reference for TR2; enables separate bias networks for dual-channel operation. |
| 5 | B2 | Base of Transistor 2: isolated gate for TR2; permits asynchronous switching or differential pair implementation. |
| 6 | C1 | Collector of Transistor 1: primary output for TR1; pairs with E1/B1 to form first independent PNP switch/amplifier. |
Key Features
| Feature | Design Value |
|---|---|
| Closely matched hFE | Enables precision current mirroring and balanced differential amplification without external trimming. |
| No mutual interference | Guarantees independent operation of TR1 and TR2-critical for isolated signal paths in mixed-voltage systems. |
| Low VCEsat | Reduces power dissipation by >30% vs. generic PNP transistors at 100 mA, improving efficiency in battery-powered designs. |
| Low collector capacitance | Preserves signal integrity above 10 MHz and minimizes crosstalk in high-density routing near RF sections. |
| Space reduction | Replaces two discrete SOT23 PNP transistors, saving ≥40% board area and reducing assembly cost and test points. |
Applications
| LED Driver Circuit | Dual-Channel Level Shifter |
|---|---|
|
Use Scenario: Driving dual-color indicator LEDs from a 3.3 V microcontroller GPIO with inverted logic and shared cathode. IC Role / Device Role / Timing Role: Dual PNP switch providing active-low current sinking for red/green LEDs with independent enable control. Use Value: Eliminates need for two separate transistors and base resistors; matching hFE ensures consistent brightness across colors. |
Use Scenario: Converting bidirectional I²C signals between 1.8 V and 5 V domains using open-drain topology. IC Role / Device Role / Timing Role: Dual PNP-based level translation stage where each transistor handles one direction (SDA/SCL) with pull-up isolation. Use Value: Prevents shoot-through during voltage transitions; low Cc maintains rise/fall times < 300 ns at 400 kHz. |
| Current Mirror Reference | Compact Relay Driver |
|
Use Scenario: Generating matched bias currents for op-amp input stages in portable instrumentation amplifiers. IC Role / Device Role / Timing Role: Precision current mirror core using TR1 as reference and TR2 as output leg under identical thermal conditions. Use Value: Achieves < ±2% current matching over −40 °C to +85 °C due to monolithic die integration and layout symmetry. |
Use Scenario: Driving two 12 V/40 mA electromagnetic relays from a low-power MCU with limited I/O drive capability. IC Role / Device Role / Timing Role: Dual high-gain PNP switch delivering full relay coil current with < 0.5 V saturation overhead. Use Value: Enables single-chip relay control without external flyback diodes or base-current limiting resistors on both channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual PNP transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC847BS | NPN complement; same SOT363-3 package, identical pinout but opposite polarity; hFE 110–800, VCEO = 45 V. | Used where active-high drive or sourcing (vs. sinking) is required; unsuitable for direct replacement in PNP-biased circuits. | Select only when circuit topology mandates NPN operation-requires redesign of bias network and load connection. |
| MBT3906DW1T1G | Onsemi dual PNP in SOT-363; VCEO = −40 V, hFE = 100–300, higher VCEsat (−650 mV @ −100 mA), no guaranteed matching. | Acceptable for non-critical switching but not for precision current mirrors or matched amplification. | Choose when cost sensitivity outweighs matching and low-saturation requirements; verify thermal margin at full load. |
Compared with BC857BS,115, BC847BS serves complementary polarity needs but cannot substitute directly, while MBT3906DW1T1G offers lower cost at the expense of gain matching, saturation voltage, and thermal performance-making BC857BS,115 optimal for space-constrained, matched dual-PNP functions.
Availability
BC857BS,115 is available at Aetrix Electronics and suitable for LED driver circuits, dual-channel level shifters, current mirror references, and compact relay drivers requiring stable component supply and consistent parametric performance across production batches.
Supply support for BC857BS,115 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 essential semiconductors-high-performance, reliable components for automotive, industrial, mobile, and computing applications.
BC857BS,115 belongs to Nexperia's general-purpose bipolar transistor family, engineered for board-space efficiency and parametric consistency in cost-sensitive, high-volume analog and interface designs.
FAQ
Is BC857BS,115 pin-compatible with BC847BS?
Yes-both use identical SOT363-3 (TSSOP6) packaging and share the same pin assignment (E1-B1-C2-E2-B2-C1). However, BC847BS is an NPN dual transistor, so direct substitution requires circuit-level polarity reversal and bias network redesign.
What is the maximum continuous power dissipation per transistor?
Per transistor, Ptot is 200 mW at Tamb ≤ 25 °C on FR4 PCB. As a dual-device, total dissipation is 300 mW under the same conditions-derating begins at 2.4 mW/°C above 25 °C per device, per Figure 1 in the datasheet.
Does BC857BS,115 support automotive-grade operation?
No-BC857BS,115 is not AEC-Q200 qualified. It is rated for industrial temperature range (−65 °C to +150 °C junction), but Nexperia explicitly states it is "non-automotive qualified" and unsuitable for safety-critical vehicle systems without additional validation.
How is thermal resistance affected when both transistors operate simultaneously?
When both transistors conduct, Rth(j-a) improves to 416 K/W (vs. 568 K/W per transistor) due to shared thermal mass and PCB copper coupling-this is reflected in the per-device derating curve (Figure 1), which assumes full dual-device loading.
BC857BS,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- 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:
- 400mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 2mA, 5V
- Power - Max:
- 200mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSSOP
BC857BS,115 FAQ
1.How can I place an order for BC857BS,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC857BS,115 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 BC857BS,115 reliable?
The price and inventory of BC857BS,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC857BS,115 is usually 5 days.
3.What payment methods are accepted for BC857BS,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC857BS,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC857BS,115?
BC857BS,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC857BS,115 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 BC857BS,115?
For technical support, including BC857BS,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC857BS,115 requirements.
6.How does Aetrix verify that BC857BS,115 is sourced from the original manufacturer or authorized distributors?
All BC857BS,115 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 BC857BS,115 meets industry standards.
7.What is the process for return or replacement of BC857BS,115?
All BC857BS,115 units undergo pre-shipment inspection (PSI). If there is an issue with BC857BS,115, 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 BC857BS,115 part is unused and in its original packaging.
Return procedure for BC857BS,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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