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

Nexperia USA Inc. BCW32,215

Name: BCW32,215
Brand: Nexperia USA Inc.
SKU: BCW32,215
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BCW32,215

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BCW32,215.pdf

Description:: TRANS NPN 32V 0.1A TO-236AB

Quantity:: RFQ Add To RFQ list

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Inventory:1,112

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Product details

Overview

BCW32,215 from Nexperia is an NPN general-purpose bipolar junction transistor in SOT23 package, rated for 32 V V_CEO, 100 mA I_C, and 250 mW P_tot, with DC current gain (h_FE) of 200–450 at I_C = 2 mA, used in low-power switching and small-signal amplification circuits in consumer and industrial control modules.

For engineers reviewing the BCW32,215 datasheet, BCW32,215 pinout, BCW32,215 application, or BCW32,215 equivalent, this device serves as a cost-optimized, surface-mount discrete switch/amplifier where moderate gain, low saturation voltage (<250 mV at I_C = 10 mA), and thermal robustness on FR4 PCBs are design-critical.

Technical Context

The BCW32 operates as a silicon NPN BJT with base-controlled current amplification, optimized for linear and saturated-mode operation in low-voltage analog and digital interface stages. Its h_FE range (200–450) and low V_CEsat (120–250 mV) support stable biasing in emitter-follower and common-emitter configurations.

Thermal resistance R_th(j-a) is 500 K/W when mounted on FR4, limiting continuous power dissipation to 250 mW at T_amb ≤ 25 °C. Cutoff currents (ICBO ≤ 100 nA at 25 °C; ≤10 μA at 100 °C) ensure reliable off-state isolation in battery-powered logic interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	32 V - maximum collector-emitter voltage before breakdown; supports 24 V rail switching
I_C (DC)	100 mA - continuous collector current limit; suitable for driving LEDs or small relays
h_FE	200–450 at I_C = 2 mA - enables predictable base drive sizing in amplifier/switch designs
V_CEsat	120–250 mV - low saturation voltage reduces conduction loss in switching applications
P_tot	250 mW - total power dissipation at T_amb ≤ 25 °C; derates linearly above ambient
f_T	100 MHz - transition frequency confirms usable gain up to audio and low RF frequencies
C_c	2.5 pF - collector capacitance minimizes high-frequency signal coupling in bias networks

Pinout & Package

BCW32,215 is housed in a plastic SOT23 (TO-236AB) surface-mount package, measuring 2.9 × 1.3 × 1.0 mm, with gull-wing leads and standard JEDEC footprint compatibility.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Current-controlled input terminal; requires ~0.7 V forward bias relative to emitter for turn-on
2	Emiter	Common reference node in common-emitter configuration; connected to ground or low-side return path
3	Collector	Output current sink terminal; handles switched load current up to 100 mA DC

Key Features

Feature	Design Value
Low-voltage operation	Rated for 32 V V_CEO - compatible with 3.3 V, 5 V, and 24 V logic and power rails
High DC current gain	h_FE = 200–450 at I_C = 2 mA - reduces required base drive current in microcontroller-driven switches
Low saturation voltage	V_CEsat ≤ 250 mV at I_C = 10 mA - minimizes power loss and self-heating during on-state conduction
Thermally characterized	R_th(j-a) = 500 K/W on FR4 - enables accurate junction temperature estimation for reliability analysis

Applications

LED Driver Circuit

Microcontroller Interface

Use Scenario: Driving indicator LEDs from 3.3 V or 5 V GPIO pins in embedded systems.

IC Role / Device Role / Timing Role: NPN switch configured in common-emitter mode, sinking LED current through collector to ground.

Use Value: Low V_CEsat ensures >95% LED forward voltage utilization; h_FE ≥200 allows GPIO to deliver <50 µA base current.

Use Scenario: Level-shifting and signal inversion between mixed-voltage logic domains (e.g., 1.8 V MCU to 5 V peripheral).

IC Role / Device Role / Timing Role: Discrete inverter stage providing rail-to-rail output swing and noise margin enhancement.

Use Value: Fast f_T (100 MHz) and low C_c (2.5 pF) preserve edge integrity up to 10 MHz signal rates.

Low-Power Sensor Amplifier

Relay Driver Stage

Use Scenario: Amplifying weak analog signals from thermistors or photodiodes in battery-operated sensors.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with emitter degeneration for linearity and stability.

Use Value: Low ICBO (≤100 nA) prevents leakage-induced offset drift; h_FE consistency enables repeatable gain calibration.

Use Scenario: Driving 5 V or 12 V coil relays from microcontroller outputs in industrial I/O modules.

IC Role / Device Role / Timing Role: Saturated switch controlling relay coil current up to 100 mA with flyback diode protection.

Use Value: 250 mW P_tot rating and 150 °C T_j limit allow sustained operation under intermittent duty cycles.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC846B,215	Higher h_FE (200–450 → 200–475), same V_CEO/I_C, lower V_CEsat (max 200 mV)	Identical SOT23 footprint; preferred where tighter h_FE tolerance or lower saturation loss is needed	Select for improved gain consistency in precision bias networks
MMBT3904LT1G	Slightly higher V_CEO (40 V vs. 32 V), same I_C, comparable h_FE (100–300)	Same package; better suited for 36 V automotive or industrial supply rails	Select when operating near 30 V supply with margin for transients

Compared with BCW32,215, BC846B,215 offers marginally better saturation performance and gain uniformity, while MMBT3904LT1G extends safe operating voltage range-both retain SOT23 compatibility but differ in stress-margin trade-offs for specific rail conditions.

Availability

BCW32,215 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller interface stages, low-power sensor amplifiers, and relay driver applications requiring stable component supply across production lifecycles.

Supply support for BCW32,215 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 leader in high-volume production of discrete semiconductors, logic devices, and PowerMOS solutions, serving automotive, industrial, computing, and consumer markets with AEC-Q101 qualified components.

BCW32,215 belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-sensitive, space-constrained applications demanding proven reliability and consistent parametric performance in SOT23 packaging.

FAQ

Is BCW32,215 RoHS compliant and halogen-free?

Yes. BCW32,215 meets RoHS Directive 2011/65/EU and is halogen-free per Nexperia's standard specification. The SOT23 package uses lead-free solderable terminations and complies with JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) for unlimited floor life at ≤30 °C/85% RH.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current (I_BM) is 200 mA, but for continuous DC operation, base current must be limited to maintain junction temperature within 150 °C. At I_C = 100 mA and h_FE = 200, typical I_B is 500 µA; sustained I_B > 2 mA requires thermal derating per R_th(j-a) = 500 K/W.

Can BCW32,215 replace BCW31 or BCW33 in existing designs?

BCW32,215 is pin-compatible with BCW31 and BCW33 but has distinct h_FE (200–450 vs. 110–220 and 420–800). Substitution is acceptable only if circuit gain tolerance accommodates the shift; BCW31 may underdrive, BCW33 may overdrive in fixed-base-resistor configurations.

Does BCW32,215 require a heatsink in standard SOT23 mounting?

No. With P_tot = 250 mW and R_th(j-a) = 500 K/W on FR4, junction temperature rise is ≤125 K at full power - acceptable within 150 °C T_j limit at T_amb ≤ 25 °C. For ambient >50 °C or pulsed loads >100 mA, verify T_j using actual duty cycle and board copper area.

BCW32,215 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 32 V

Vce Saturation (Max) @ Ib, Ic:: 210mV @ 2.5mA, 50mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 2mA, 5V

Power - Max:: 250 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BCW32,215 FAQ

1.How can I place an order for BCW32,215 through Aetrix?

Please submit a Request for Quotation (RFQ) for BCW32,215 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 BCW32,215 reliable?

The price and inventory of BCW32,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCW32,215 is usually 5 days.

3.What payment methods are accepted for BCW32,215?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCW32,215 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCW32,215?

BCW32,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCW32,215 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 BCW32,215?

For technical support, including BCW32,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCW32,215 requirements.

6.How does Aetrix verify that BCW32,215 is sourced from the original manufacturer or authorized distributors?

All BCW32,215 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 BCW32,215 meets industry standards.

7.What is the process for return or replacement of BCW32,215?

All BCW32,215 units undergo pre-shipment inspection (PSI). If there is an issue with BCW32,215, 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 BCW32,215 part is unused and in its original packaging.

Return procedure for BCW32,215:

1.Submit a request within 90 days.

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

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