My Inquiry
My Account
Nexperia USA Inc. BC856BW,135
- Part No.:
- BC856BW,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
BC856BW,135.pdf
- Description:
- TRANS PNP 65V 0.1A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:48,856
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BC856BW,135 from Nexperia is a PNP general-purpose bipolar junction transistor in SOT323 (SC-70) package, rated for −65 V VCEO, −100 mA IC, and DC current gain (hFE) of 220–475 at VCE = −5 V and IC = −2 mA. It serves as a low-power switching or linear amplification device in compact consumer and industrial signal-path circuits.
For engineers reviewing the BC856BW,135 datasheet, BC856BW,135 pinout, BC856BW,135 application, or BC856BW,135 equivalent, this part supports design-in decisions requiring verified small-signal PNP performance, thermal reliability on FR4 PCBs, and compatibility with standard SC-70 reflow profiles.
Technical Context
The BC856BW operates as a silicon PNP BJT with fixed emitter-base and collector-base junction structures optimized for stable DC gain across −55 °C to +150 °C ambient range. Its hFE binning (220–475) ensures predictable base drive requirements in saturated switch configurations.
Thermal resistance Rth(j-a) is 625 K/W under standard FR4 mounting conditions, and its VCE(sat) remains ≤ −600 mV at IC = −100 mA / IB = −5 mA, enabling efficient low-voltage logic-level interfacing without external bias compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V - Maximum allowable collector-emitter voltage before breakdown; supports rail-to-rail operation in ≤60 V PNP-switched supplies. |
| IC | −100 mA - Continuous collector current rating; suitable for driving LEDs, relays, or small-signal loads without heatsinking. |
| hFE | 220–475 @ VCE = −5 V, IC = −2 mA - Confirmed DC current gain range enables precise base resistor calculation for predictable saturation. |
| VCE(sat) | ≤ −600 mV @ IC = −100 mA, IB = −5 mA - Low saturation voltage minimizes power loss and heat generation in switching applications. |
| Ptot | 200 mW @ Tamb ≤ 25 °C - Power dissipation limit defines safe operating area on standard FR4 PCB with 35 µm copper. |
| fT | 100 MHz - Transition frequency confirms usability in audio-frequency amplification and low-speed digital switching up to ~10 MHz. |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package: 1.35 mm × 1.15 mm footprint, 0.4 mm nominal thickness, 3-terminal leadless construction optimized for high-density PCB layouts and automated reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Control terminal; requires current-limited drive to achieve specified hFE and VCE(sat) performance. |
| 2 | Emitter (E) | Current source terminal; connected to higher potential rail in PNP common-emitter configurations. |
| 3 | Collector (C) | Output terminal; sinks current to load when base is forward-biased; electrically isolated from package pad. |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage PNP switching | Rated for −65 V VCEO and −80 V VCBO, enabling use in 48 V telecom and 24 V industrial control rails. |
| High-current-gain binning | hFE = 220–475 ensures consistent base drive requirements across production lots without recalculating bias networks. |
| Thermally robust SMT package | Rth(j-a) = 625 K/W on standard FR4 allows full 200 mW dissipation without derating below 70 °C ambient. |
| Low-noise amplification | NF = 2–10 dB @ IC = −200 µA, VCE = −5 V, f = 1 kHz - suitable for preamplifier stages in sensor interfaces. |
Applications
| LED Driver Circuit | Level-Shifting Interface |
|---|---|
Use Scenario: Driving discrete indicator LEDs from 3.3 V or 5 V microcontroller GPIO pins with active-low logic. IC Role / Device Role / Timing Role: PNP switch controlling LED anode connection to supply rail; base driven by MCU output. Use Value: VCE(sat) ≤ −600 mV ensures ≥2.7 V forward voltage available to LED at 20 mA, minimizing brightness variation. |
Use Scenario: Translating 1.8 V logic outputs to 5 V or 12 V domains in mixed-voltage systems. IC Role / Device Role / Timing Role: Active-pull-up level shifter using emitter-follower configuration with base referenced to target rail. Use Value: hFE ≥ 220 guarantees sufficient current sourcing capability into 10 kΩ loads without signal degradation. |
| Relay Coil Driver | Audio Preamp Stage |
Use Scenario: Switching 5 V or 12 V relay coils in home automation or PLC I/O modules. IC Role / Device Role / Timing Role: Common-emitter saturated switch sinking coil current to ground; flyback diode integrated externally. Use Value: IC = −100 mA rating matches typical 40–80 mA relay coil currents, eliminating need for Darlington pairing. |
Use Scenario: Low-noise voltage amplification of piezoelectric sensor or electret microphone signals. IC Role / Device Role / Timing Role: Common-emitter amplifier with emitter degeneration resistor for linearity and bandwidth control. Use Value: NF = 2–10 dB and fT = 100 MHz support clean 20 Hz–20 kHz audio band amplification with minimal added noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP general-purpose transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC856AW,135 | hFE = 125–250 (lower gain bin); identical VCEO, IC, and package | Requires higher base drive current for same collector load; less margin in low-IB designs | Select when cost sensitivity outweighs gain consistency needs and base drive is abundant. |
| BC846BW,135 | NPN complement; same hFE range (220–475), VCEO = +65 V, IC = +100 mA | Used in high-side vs. low-side switching; incompatible polarity without circuit redesign | Choose only when NPN topology is required-e.g., grounded-emitter load switching or current mirror pairs. |
Compared with BC856AW,135, the BC856BW,135 provides higher guaranteed hFE for reduced base current demand; versus BC846BW,135, it enables high-side switching but cannot substitute directly due to polarity reversal.
Availability
BC856BW,135 is available at Aetrix Electronics and suitable for LED driver circuits, relay interface modules, level-shifting interfaces, and audio preamplifier stages requiring stable component supply and consistent parametric performance across production batches.
Supply support for BC856BW,135 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 essential semiconductors for automotive, industrial, and consumer markets.
The BC856BW belongs to Nexperia's BC846/856 family of general-purpose transistors designed for space-constrained, cost-sensitive signal switching and amplification in mass-produced electronics.
FAQ
What is the maximum junction temperature for BC856BW,135?
The absolute maximum junction temperature (Tj) is 150 °C, as defined in the Absolute Maximum Ratings table. Operation above this threshold risks permanent parametric shift or failure. Derating begins at Tamb > 70 °C per the thermal resistance curve in Figure 1.
Does BC856BW,135 have automotive qualification?
No. BC856BW,135 is not AEC-Q101 qualified and is designated for industrial and consumer applications only. Nexperia explicitly states non-automotive qualification in Section 14 of the datasheet, and no automotive test reports are published for this part number.
Can BC856BW,135 replace BC856B in through-hole designs?
No. BC856BW,135 uses SOT323 (SC-70) surface-mount packaging, while legacy BC856B typically uses TO-92 or SOT23 packages. Footprint, soldering profile, and thermal behavior differ significantly-direct replacement requires PCB redesign and revalidation.
What is the emitter-base breakdown voltage specification?
V(BR)EBO is −5 V minimum, tested with IC = 0 A and IE = −100 µA. This defines the maximum reverse bias permissible across the emitter-base junction before avalanche conduction occurs, critical for protection in reverse-active or E-B forward-biased fault conditions.
BC856BW,135 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 65 V
- Vce Saturation (Max) @ Ib, Ic:
- 600mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 2mA, 5V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BC856BW,135 FAQ
1.How can I place an order for BC856BW,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BC856BW,135 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 BC856BW,135 reliable?
The price and inventory of BC856BW,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856BW,135 is usually 5 days.
3.What payment methods are accepted for BC856BW,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856BW,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BC856BW,135?
BC856BW,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BC856BW,135 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 BC856BW,135?
For technical support, including BC856BW,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856BW,135 requirements.
6.How does Aetrix verify that BC856BW,135 is sourced from the original manufacturer or authorized distributors?
All BC856BW,135 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 BC856BW,135 meets industry standards.
7.What is the process for return or replacement of BC856BW,135?
All BC856BW,135 units undergo pre-shipment inspection (PSI). If there is an issue with BC856BW,135, 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 BC856BW,135 part is unused and in its original packaging.
Return procedure for BC856BW,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BC856BW,135 Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
