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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Nexperia USA Inc. BCV29,115

Name: BCV29,115
Brand: Nexperia USA Inc.
SKU: BCV29,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCV29,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: BCV29,115.pdf

Description:: TRANS NPN DARL 30V 0.5A SOT-89

Quantity:: RFQ Add To RFQ list

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Inventory:1,445

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Product details

Overview

BCV29,115 from Nexperia is an AEC-Q101-qualified NPN Darlington transistor in SOT89 package, delivering 500 mA collector current, 30 V V_CE, and minimum DC current gain of 20,000 at 100 mA. It serves as a high-gain preamplifier input stage in automotive sensor signal conditioning circuits.

For engineers reviewing the BCV29,115 datasheet, BCV29,115 pinout, BCV29,115 application, or BCV29,115 equivalent, this device is selected for low-noise, high-β amplification where base drive efficiency and thermal stability under ambient extremes (−65 °C to +150 °C) are critical.

Technical Context

The BCV29,115 integrates two cascaded NPN transistors in a monolithic Darlington configuration, achieving ultra-high h_FE (>20,000 at I_C = 100 mA) while maintaining V_CE(sat) ≤ 1 V and V_BE(sat) ≤ 1.5 V. Its internal structure enables single-base control of high collector current with minimal drive.

Designed for automotive-grade reliability, it meets AEC-Q101 stress test requirements and operates across −65 °C to +150 °C junction temperature range. Thermal resistance R_th(j-sp) is 16 K/W when mounted on FR4 PCB with 1 cm² collector pad, supporting sustained 500 mA operation without forced cooling.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CE max	30 V - supports 24 V automotive supply rails with margin for transient spikes
I_C continuous	500 mA - sufficient for driving small relays, LED arrays, or sensor bias networks
h_FE min	20,000 at I_C = 100 mA - enables microampere-level base drive for robust noise immunity
V_CE(sat)	≤ 1 V at I_C = 100 mA, I_B = 0.1 mA - minimizes power loss and self-heating in linear amplification
R_th(j-sp)	16 K/W - allows direct PCB copper pad heat sinking without heatsink or airflow
T_j max	150 °C - qualified for under-hood automotive environments per AEC-Q101
f_T	220 MHz - supports bandwidth-critical preamplifier stages up to ~10 MHz closed-loop

Pinout & Package

SOT89 (SC-62) plastic surface-mount package: 3-lead, 1.5 mm pitch, 4.5 mm × 2.5 mm × 1.5 mm body, with exposed collector pad for thermal conduction.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Low-impedance output node; referenced to ground or negative rail in common-collector configurations
2	Collector	High-current output terminal; electrically and thermally connected to exposed pad for PCB heat sinking
3	Base	High-impedance control input; requires <10 µA drive for full 500 mA output due to Darlington β

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces
Ultra-high DC current gain	h_FE ≥ 20,000 at I_C = 100 mA reduces base drive circuit complexity and PCB area
Low saturation voltage	V_CE(sat) ≤ 1 V ensures <100 mW dissipation at 100 mA, enabling compact layout
Thermal performance	R_th(j-sp) = 16 K/W enables reliable 500 mA operation on standard FR4 without thermal vias or heatsinks

Applications

Automotive Cabin Temperature Sensor Interface

Industrial Proximity Switch Amplifier

Use Scenario: Amplifies weak thermistor bridge output in HVAC control modules operating at 125 °C ambient.

IC Role / Device Role / Timing Role: NPN Darlington preamplifier providing >20,000 gain with <1 µA base current draw to preserve sensor excitation accuracy.

Use Value: Eliminates need for op-amp buffering stage, reducing BOM count and board space while maintaining ±0.5 °C measurement accuracy.

Use Scenario: Drives 24 V relay coil in factory automation proximity sensors exposed to vibration and EMI.

IC Role / Device Role / Timing Role: High-current switch amplifier translating TTL logic to 500 mA load current with fast turn-on/turn-off.

Use Value: Enables direct microcontroller GPIO drive without external driver IC, cutting system cost by $0.18/unit at volume.

LED Driver for Automotive Interior Lighting

Current Mirror Reference in Battery Monitor IC

Use Scenario: Constant-current sink for white LED strings in door handle illumination modules.

IC Role / Device Role / Timing Role: Linear current regulator using emitter degeneration, leveraging high h_FE for stable 350 mA setpoint.

Use Value: Maintains LED brightness uniformity across −40 °C to +85 °C without trimming resistors or temperature compensation circuitry.

Use Scenario: Precision current reference element in lithium-ion battery fuel gauge ICs.

IC Role / Device Role / Timing Role: Matched Darlington pair component ensuring <0.1% current ratio drift over temperature and lifetime.

Use Value: Improves state-of-charge estimation accuracy to ±1.2% over 500 cycles by stabilizing reference current against process variation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN Darlington transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BCV27,115	Lower h_FE (min. 10,000), same SOT89 package and V_CE/I_C ratings	Suitable for less demanding gain requirements; higher base current needed for same output	Select when design tolerates 2× base drive current and cost sensitivity outweighs gain margin
ZTX951	TO-92 package, higher V_CEO (60 V), lower h_FE (min. 500), no AEC-Q101 qualification	Non-automotive industrial use only; requires through-hole assembly and external heatsinking above 200 mA	Choose only for legacy through-hole designs or non-automotive applications where voltage headroom >40 V is required

Compared with BCV27,115 and ZTX951, the BCV29,115 uniquely combines AEC-Q101 qualification, SOT89 surface-mount compatibility, and guaranteed h_FE ≥20,000-enabling single-stage, low-power, high-reliability amplification in space-constrained automotive modules.

Availability

BCV29,115 is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial sensor interfaces, and LED lighting control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BCV29,115 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.

The BCV29,115 belongs to Nexperia's AEC-Q101-qualified small-signal transistor family, engineered specifically for high-gain, thermally robust amplification in harsh-environment automotive and industrial control systems.

FAQ

Is BCV29,115 pin-compatible with BCV28,115?

No. BCV29,115 is an NPN Darlington; BCV28,115 is its PNP complement. They share identical SOT89 pinout (E-C-B), but polarity reversal means direct substitution would invert circuit function and likely cause failure. Use only as complementary pairs in push-pull or differential topologies.

What is the maximum safe continuous collector current at 100 °C ambient?

At T_amb = 100 °C, derated I_C is 320 mA. This is calculated using P_tot = 1.3 W and R_th(j-a) = 96 K/W: T_j = T_amb + P × R_th(j-a). To maintain T_j ≤ 150 °C, power must stay ≤ 0.52 W, limiting I_C to ~320 mA assuming V_CE(sat) ≈ 0.8 V.

Does BCV29,115 require a base resistor in switching applications?

Yes. Even with high h_FE, a series base resistor is mandatory to limit I_B and prevent thermal runaway. For 500 mA I_C, minimum I_B = 25 µA (assuming h_FE = 20,000); typical design uses 10–100× safety margin, e.g., 1–10 kΩ from 3.3 V or 5 V logic.

Can BCV29,115 be used in linear regulator pass elements?

No. While capable of 500 mA, its V_CE rating (30 V) and lack of built-in thermal shutdown or SOA protection make it unsuitable as a primary pass transistor. It may serve in low-dropout pre-regulator stages but not as main regulation element in standalone linear regulators.

BCV29,115 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN - Darlington

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 1V @ 100µA, 100mA

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 20000 @ 100mA, 5V

Power - Max:: 1.3 W

Frequency - Transition:: 220MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89

BCV29,115 FAQ

1.How can I place an order for BCV29,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCV29,115 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 BCV29,115 reliable?

The price and inventory of BCV29,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCV29,115 is usually 5 days.

3.What payment methods are accepted for BCV29,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCV29,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCV29,115?

BCV29,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCV29,115 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 BCV29,115?

For technical support, including BCV29,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCV29,115 requirements.

6.How does Aetrix verify that BCV29,115 is sourced from the original manufacturer or authorized distributors?

All BCV29,115 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 BCV29,115 meets industry standards.

7.What is the process for return or replacement of BCV29,115?

All BCV29,115 units undergo pre-shipment inspection (PSI). If there is an issue with BCV29,115, 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 BCV29,115 part is unused and in its original packaging.

Return procedure for BCV29,115:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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