Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

NXP Semiconductors BC337-16,112

Name: BC337-16,112
Brand: NXP Semiconductors
SKU: BC337-16,112
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BC337-16,112

Manufacturer:: NXP Semiconductors

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: BC337-16,112.pdf

Description:: TRANS NPN 45V 0.5A TO-92-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:7,455

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BC337-16,112 from Nexperia is an NPN general-purpose bipolar junction transistor (BJT) in a through-hole SOT54 (TO-92) package, rated for 45 V V_CEO, 500 mA I_C, and 625 mW P_tot, with DC current gain (h_FE) of 100–250 at I_C = 100 mA and V_CE = 1 V. It serves as a low-voltage, medium-current switch or linear amplifier in discrete power control and signal conditioning circuits.

For engineers reviewing the BC337-16,112 datasheet, BC337-16,112 pinout, BC337-16,112 application, or BC337-16,112 equivalent, this page delivers verified electrical parameters, TO-92 terminal mapping, thermal resistance (R_th(j-a) = 200 K/W), saturation voltage (V_CEsat ≤ 700 mV at I_C = 500 mA/I_B = 50 mA), and validated alternatives for industrial control, LED driver, and relay interface designs.

Technical Context

The BC337-16,112 operates as a standard NPN BJT with base-controlled current amplification, supporting both switching and analog amplification modes. Its h_FE binning (-16 variant) guarantees minimum DC gain of 100 and maximum of 250 under standardized test conditions (I_C = 100 mA, V_CE = 1 V), enabling predictable biasing in fixed-gain stages.

Designed for through-hole mounting on FR4 PCBs with single-sided copper, it exhibits R_th(j-a) = 200 K/W and T_j max = 150 °C, allowing reliable operation up to 625 mW dissipation at T_amb ≤ 25 °C. Its V_BE ≈ 1.2 V and V_CEsat ≤ 700 mV support efficient low-side switching in 5 V and 3.3 V logic-driven systems.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown; supports 24 V industrial bus and 36 V automotive auxiliary circuits.
I_C (DC)	500 mA - Continuous collector current rating; suitable for driving small relays, LEDs, or MOSFET gates without external heat sinking.
h_FE	100–250 - DC current gain range at I_C = 100 mA/V_CE = 1 V; enables stable bias design with ±20% gain tolerance in emitter-follower or common-emitter configurations.
V_CEsat	≤ 700 mV at I_C = 500 mA/I_B = 50 mA - Low saturation voltage minimizes conduction loss in switching applications, reducing power dissipation to < 350 mW.
P_tot	625 mW at T_amb ≤ 25 °C - Total power dissipation limit; defines safe operating area for continuous operation on standard PCB layouts.
R_th(j-a)	200 K/W - Junction-to-ambient thermal resistance; allows ~3.1 °C rise per mW, supporting thermal management without heatsinks below 300 mW load.
f_T	100 MHz - Transition frequency at I_C = 10 mA/V_CE = 5 V; confirms usability in audio-frequency amplification and low-speed digital switching (< 10 MHz).

Pinout & Package

BC337-16,112 uses the SOT54 (TO-92) plastic single-ended leaded through-hole package with 3 leads, 2.54 mm lead pitch, and JEITA SC-43A outline. Dimensions: L = 14.5 mm, D = 4.8 mm, E = 4.2 mm, b = 0.48 mm, c = 0.45 mm.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current sink node; connects to ground or low-side return path; polarity defines NPN topology and current flow direction.
2	Base	Control input; requires ~1.2 V forward bias and sufficient I_B (e.g., 50 mA for 500 mA I_C) to drive into saturation.
3	Collector	Current source node; connects to load and supply rail; handles full switched current and must be routed with adequate trace width.

Key Features

Feature	Design Value
High DC current gain consistency	h_FE = 100–250 (−16 bin) ensures repeatable bias point across production lots, reducing calibration needs in analog sensor interfaces.
Low V_CEsat	≤ 700 mV at full 500 mA load enables >98% efficiency in 5 V logic-controlled switches, minimizing thermal stress on adjacent components.
Robust thermal performance	R_th(j-a) = 200 K/W allows full-rated operation at ambient ≤ 25 °C on standard FR4, eliminating need for thermal vias or copper pours in cost-sensitive designs.
Through-hole reliability	SOT54 (TO-92) mechanical stability supports vibration-prone environments (e.g., industrial controls, automotive body electronics) better than surface-mount equivalents.

Applications

LED Driver Circuit	Microcontroller GPIO Expander
Use Scenario: Driving 20–50 mA indicator or status LEDs from 3.3 V or 5 V microcontroller outputs. IC Role / Device Role / Timing Role: NPN switch configured in common-emitter mode, sinking LED current to ground when base is driven high. Use Value: V_CEsat ≤ 700 mV ensures minimal voltage drop across BC337-16,112, preserving ≥ 4.3 V headroom for 5 V LEDs and ≥ 2.6 V for 3.3 V red/green LEDs.	Use Scenario: Extending limited GPIO count by controlling higher-current peripherals (e.g., solenoids, fans) via microcontroller logic-level signals. IC Role / Device Role / Timing Role: Discrete level-shifting switch translating 3.3 V/5 V logic to 12 V/24 V loads using base resistor biasing. Use Value: 500 mA I_C rating and 45 V V_CEO allow direct control of 24 V/200 mA solenoids without additional protection circuitry.
Relay Interface Stage	Audio Pre-amplifier Input Stage
Use Scenario: Isolating and driving electromagnetic relays (e.g., 12 V, 100–300 Ω coil) from low-power logic circuits. IC Role / Device Role / Timing Role: Medium-current switch providing galvanic isolation between MCU and relay coil, with flyback diode integration. Use Value: 625 mW P_tot and 200 K/W R_th(j-a) permit continuous 12 V/100 mA relay drive without thermal derating on standard PCBs.	Use Scenario: Low-noise pre-amplification of microphone or sensor signals in battery-powered audio devices. IC Role / Device Role / Timing Role: Common-emitter amplifier stage with emitter degeneration, leveraging h_FE = 100–250 for stable voltage gain. Use Value: f_T = 100 MHz and low C_c = 3 pF support bandwidth up to 20 kHz with minimal phase distortion in voice-band applications.

LED Driver Circuit

Microcontroller GPIO Expander

Use Scenario: Driving 20–50 mA indicator or status LEDs from 3.3 V or 5 V microcontroller outputs.

IC Role / Device Role / Timing Role: NPN switch configured in common-emitter mode, sinking LED current to ground when base is driven high.

Use Value: V_CEsat ≤ 700 mV ensures minimal voltage drop across BC337-16,112, preserving ≥ 4.3 V headroom for 5 V LEDs and ≥ 2.6 V for 3.3 V red/green LEDs.

Use Scenario: Extending limited GPIO count by controlling higher-current peripherals (e.g., solenoids, fans) via microcontroller logic-level signals.

IC Role / Device Role / Timing Role: Discrete level-shifting switch translating 3.3 V/5 V logic to 12 V/24 V loads using base resistor biasing.

Use Value: 500 mA I_C rating and 45 V V_CEO allow direct control of 24 V/200 mA solenoids without additional protection circuitry.

Relay Interface Stage

Audio Pre-amplifier Input Stage

Use Scenario: Isolating and driving electromagnetic relays (e.g., 12 V, 100–300 Ω coil) from low-power logic circuits.

IC Role / Device Role / Timing Role: Medium-current switch providing galvanic isolation between MCU and relay coil, with flyback diode integration.

Use Value: 625 mW P_tot and 200 K/W R_th(j-a) permit continuous 12 V/100 mA relay drive without thermal derating on standard PCBs.

Use Scenario: Low-noise pre-amplification of microphone or sensor signals in battery-powered audio devices.

IC Role / Device Role / Timing Role: Common-emitter amplifier stage with emitter degeneration, leveraging h_FE = 100–250 for stable voltage gain.

Use Value: f_T = 100 MHz and low C_c = 3 pF support bandwidth up to 20 kHz with minimal phase distortion in voice-band applications.

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
BC337-25,112	Higher h_FE range (160–400) at same V_CEO/I_C; identical SOT54 package and pinout.	Better suited for low-base-drive applications (e.g., weak MCU outputs); may require adjusted base resistors to avoid overdrive.	Select BC337-25,112 when precise gain matching or reduced base current is critical; BC337-16,112 preferred for tighter h_FE tolerance in production-binned designs.
BC337-40,112	Highest h_FE bin (250–600); same package, voltage, and current ratings as BC337-16,112.	Enables ultra-low I_B operation (e.g., < 2 mA for 500 mA I_C), but increased gain variation may affect linearity in analog use.	Choose BC337-40,112 only when minimal base drive is mandatory and gain spread is acceptable; BC337-16,112 offers best balance of gain stability and drive margin.

Compared with BC337-25,112 and BC337-40,112, the BC337-16,112 provides the narrowest h_FE spread (100–250), delivering superior bias predictability in production assemblies where consistent turn-on thresholds and thermal behavior are required across temperature and lot variations.

Availability

BC337-16,112 is available at Aetrix Electronics and suitable for industrial control panels, LED signage drivers, and relay-based automation systems requiring stable component supply and long-term obsolescence management.

Supply support for BC337-16,112 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 discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division, with core focus on automotive, industrial, computing, and consumer markets.

The BC337 series belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-effective, reliable switching and amplification in high-volume industrial and consumer electronics where robustness and parametric consistency are essential.

FAQ

What is the maximum collector-emitter voltage rating for BC337-16,112?

The BC337-16,112 has a maximum collector-emitter voltage (V_CEO) rating of 45 V under open-base conditions with I_C = 10 mA. This rating is absolute and must not be exceeded in any operating condition to prevent avalanche breakdown or permanent device failure.

Does BC337-16,112 support switching at 100 kHz?

Yes, BC337-16,112 supports switching at 100 kHz due to its f_T = 100 MHz and low C_c = 3 pF, but practical duty-cycle-limited switching speed depends on external base drive strength and load capacitance. For reliable 100 kHz operation, ensure I_B ≥ 10× I_C/h_FE(min) and minimize stray capacitance in layout.

What is the thermal resistance from junction to ambient for BC337-16,112?

The thermal resistance from junction to ambient (R_th(j-a)) for BC337-16,112 is 200 K/W when mounted on an FR4 PCB with single-sided copper, tin-plated, and standard footprint. This value assumes no added copper pour or thermal vias and defines the temperature rise per watt of dissipated power.

Is BC337-16,112 pin-compatible with BC337-25,112 and BC337-40,112?

Yes, BC337-16,112, BC337-25,112, and BC337-40,112 share identical SOT54 (TO-92) package dimensions, lead pitch (2.54 mm), and pinout (Emitter-Base-Collector on pins 1-2-3), making them mechanically and electrically interchangeable without PCB changes.

What is the DC current gain range of BC337-16,112 at I_C = 100 mA and V_CE = 1 V?

The DC current gain (h_FE) of BC337-16,112 is specified from 100 to 250 under test conditions of I_C = 100 mA and V_CE = 1 V. This binning ensures predictable base current requirements and stable operating points in production designs.

BC337-16,112 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 45 V

Vce Saturation (Max) @ Ib, Ic:: 700mV @ 50mA, 500mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 100mA, 1V

Power - Max:: 625 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

BC337-16,112 FAQ

1.How can I place an order for BC337-16,112 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC337-16,112 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 BC337-16,112 reliable?

The price and inventory of BC337-16,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC337-16,112 is usually 5 days.

3.What payment methods are accepted for BC337-16,112?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC337-16,112 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC337-16,112?

BC337-16,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC337-16,112 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 BC337-16,112?

For technical support, including BC337-16,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC337-16,112 requirements.

6.How does Aetrix verify that BC337-16,112 is sourced from the original manufacturer or authorized distributors?

All BC337-16,112 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 BC337-16,112 meets industry standards.

7.What is the process for return or replacement of BC337-16,112?

All BC337-16,112 units undergo pre-shipment inspection (PSI). If there is an issue with BC337-16,112, 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 BC337-16,112 part is unused and in its original packaging.

Return procedure for BC337-16,112:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

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…