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

NXP Semiconductors BC337-40,116

Name: BC337-40,116
Brand: NXP Semiconductors
SKU: BC337-40,116
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC337-40,116

Manufacturer:: NXP Semiconductors

Category:: Single Bipolar Transistors

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

Datasheet:: BC337-40,116.pdf

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

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Product details

Overview

BC337-40,116 from Nexperia is an NPN general-purpose bipolar junction transistor (BJT) in a through-hole SOT54A (TO-92 wide-pitch) package, rated for 45 V V_CEO, 500 mA I_C, and DC current gain (h_FE) of 250–600 at I_C = 100 mA and V_CE = 1 V. It delivers 625 mW power dissipation at T_amb ≤ 25 °C and supports general-purpose switching in low-voltage DC control circuits such as relay drivers and LED interfaces.

For engineers reviewing the BC337-40,116 datasheet, BC337-40,116 pinout, BC337-40,116 application, or BC337-40,116 equivalent, this page provides verified electrical parameters, terminal mapping for SOT54A, thermal resistance (R_th(j-a) = 200 K/W), saturation voltage (V_CE(sat) ≤ 700 mV at I_C = 500 mA/I_B = 50 mA), and validated alternatives for discrete BJT replacement in industrial and consumer PCB designs.

Technical Context

The BC337-40,116 operates as a silicon NPN BJT with base-controlled current amplification, optimized for linear amplification and saturated switching. Its h_FE range of 250–600 ensures stable gain across production lots at I_C = 100 mA, while V_CE(sat) ≤ 700 mV enables efficient on-state conduction in low-dropout driver stages.

Thermally, it features R_th(j-a) = 200 K/W when mounted on FR4 with standard single-sided copper, supporting continuous operation up to T_j = 150 °C. The device complies with IEC 60134 absolute maximum ratings, including V_CBO = 50 V and V_EBO = 5 V, ensuring robustness against transient overvoltage and reverse bias stress.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum collector-emitter voltage before breakdown under open-base conditions; defines safe operating voltage ceiling in switching applications.
I_C (DC)	500 mA - Continuous collector current rating; sets upper limit for steady-state load drive capability without thermal derating.
h_FE	250–600 - DC current gain at I_C = 100 mA/V_CE = 1 V; determines required base drive current for target collector current.
V_CE(sat)	≤ 700 mV at I_C = 500 mA/I_B = 50 mA - Low saturation voltage minimizes power loss and heat generation in switched-on state.
P_tot	625 mW at T_amb ≤ 25 °C - Total power dissipation limit; governs thermal design margin for PCB copper area and ambient temperature derating.
R_th(j-a)	200 K/W - Junction-to-ambient thermal resistance on standard FR4; used to calculate junction temperature rise under load.
f_T	100 MHz - Transition frequency at I_C = 10 mA/V_CE = 5 V; indicates usable bandwidth for small-signal amplification.

Pinout & Package

BC337-40,116 uses the SOT54A (TO-92 wide-pitch) plastic through-hole package with 3 leads, featuring 5.08 mm lead pitch (e) and 2.54 mm spacing between emitter and base (e1). This variant accommodates automated insertion and improves mechanical stability versus standard SOT54.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Current exit path; connected to ground or low-side return in common-emitter configurations.
2	Base	Control input; requires current-limited drive (e.g., via series resistor) to bias transistor into active or saturation region.
3	Collector	Current entry path; tied to load (e.g., relay coil or LED anode) and supply rail in low-side switch topologies.

Key Features

Feature	Design Value
High DC current gain	h_FE = 250–600 ensures reliable saturation with modest base drive (e.g., 2 mA base current switches 500 mA load).
Low V_CE(sat)	≤ 700 mV at full rated current reduces conduction losses and eases thermal management in compact layouts.
Robust voltage ratings	V_CEO = 45 V and V_CBO = 50 V support operation across 24 V industrial rails and transient-suppressed 36 V automotive subsystems.
Through-hole reliability	SOT54A package provides mechanical retention and solder-joint integrity superior to surface-mount equivalents in high-vibration environments.

Applications

Relay Driver Circuit	LED Current Switch
Use Scenario: Driving 12 V/500 mA electromagnetic relay coils in PLC output modules. IC Role / Device Role / Timing Role: NPN BJT configured as low-side switch, controlled by microcontroller GPIO. Use Value: 625 mW P_tot and 500 mA I_C enable direct coil drive without external buffer; V_CE(sat) ≤ 700 mV limits self-heating during sustained activation.	Use Scenario: Controlling high-brightness white LEDs in signage and indicator panels. IC Role / Device Role / Timing Role: Constant-current switch regulating LED string current via base-resistor biasing. Use Value: h_FE ≥ 250 allows precise current setting with low-tolerance base resistors; 45 V V_CEO accommodates 3–5 LED series strings.
DC Motor Speed Control	Signal-Level Amplifier Stage
Use Scenario: PWM-driven 24 V brushed DC motor in HVAC damper actuators. IC Role / Device Role / Timing Role: Power switch in emitter-follower or common-emitter configuration handling pulsed load currents. Use Value: I_CM = 1 A peak rating supports motor startup surges; R_th(j-a) = 200 K/W enables operation at 60 °C ambient without heatsink.	Use Scenario: Audio preamplifier stage for sensor signal conditioning in test equipment. IC Role / Device Role / Timing Role: Small-signal amplifier with fixed bias network, operating in linear region. Use Value: f_T = 100 MHz supports bandwidth up to 10 kHz with gain stability; low ICBO (≤100 nA) preserves DC accuracy in high-impedance feedback networks.

Relay Driver Circuit

LED Current Switch

Use Scenario: Driving 12 V/500 mA electromagnetic relay coils in PLC output modules.

IC Role / Device Role / Timing Role: NPN BJT configured as low-side switch, controlled by microcontroller GPIO.

Use Value: 625 mW P_tot and 500 mA I_C enable direct coil drive without external buffer; V_CE(sat) ≤ 700 mV limits self-heating during sustained activation.

Use Scenario: Controlling high-brightness white LEDs in signage and indicator panels.

IC Role / Device Role / Timing Role: Constant-current switch regulating LED string current via base-resistor biasing.

Use Value: h_FE ≥ 250 allows precise current setting with low-tolerance base resistors; 45 V V_CEO accommodates 3–5 LED series strings.

DC Motor Speed Control

Signal-Level Amplifier Stage

Use Scenario: PWM-driven 24 V brushed DC motor in HVAC damper actuators.

IC Role / Device Role / Timing Role: Power switch in emitter-follower or common-emitter configuration handling pulsed load currents.

Use Value: I_CM = 1 A peak rating supports motor startup surges; R_th(j-a) = 200 K/W enables operation at 60 °C ambient without heatsink.

Use Scenario: Audio preamplifier stage for sensor signal conditioning in test equipment.

IC Role / Device Role / Timing Role: Small-signal amplifier with fixed bias network, operating in linear region.

Use Value: f_T = 100 MHz supports bandwidth up to 10 kHz with gain stability; low ICBO (≤100 nA) preserves DC accuracy in high-impedance feedback networks.

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
BC337-40,412	Same electrical specs but supplied in bulk (straight leads) rather than tape-and-reel; identical SOT54A pinout and marking (C33740).	Preferred for manual prototyping or low-volume assembly where reel handling is unnecessary.	Select BC337-40,412 when reel packaging is not required and cost-per-unit is prioritized over automated placement compatibility.
BC337-40,126	Identical silicon die and SOT54A package, but shipped in tape ammopack format; same thermal and electrical performance.	Used in high-mix SMT lines requiring flexible feeder compatibility and static-safe transport.	Choose BC337-40,126 for mixed-technology boards where ammopack reels integrate seamlessly with existing pick-and-place workflows.

Compared with BC337-40,116, the BC337-40,412 offers identical functionality in bulk form for lab use, while BC337-40,126 provides ammopack delivery for automated assembly-both preserve the 250–600 h_FE, 45 V rating, and SOT54A pinout without layout or schematic changes.

Availability

BC337-40,116 is available at Aetrix Electronics and suitable for relay drivers, LED current switches, DC motor controls, and signal-level amplifiers requiring stable component supply across industrial, consumer, and computing applications.

Supply support for BC337-40,116 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 business and focused on automotive, industrial, computing, and consumer markets.

The BC337-40,116 belongs to Nexperia's legacy general-purpose BJT product line, engineered for cost-effective, reliable switching and amplification in through-hole designs where mechanical robustness and ease of hand-soldering are critical.

FAQ

What is the pin configuration of BC337-40,116?

The BC337-40,116 uses the SOT54A package with Pin 1 = Emitter, Pin 2 = Base, and Pin 3 = Collector. This emitter-base-collector order matches JEITA SC-43A and is confirmed in Table 3 of the official Nexperia datasheet. The pinout is identical across all BC337-40 variants regardless of packing method.

What does the "40" suffix indicate in BC337-40,116?

The "40" in BC337-40,116 denotes the h_FE gain group: minimum 250, typical 400, and maximum 600 at I_C = 100 mA and V_CE = 1 V. This distinguishes it from BC337-16 (h_FE = 100–250) and BC337-25 (h_FE = 160–400), enabling predictable base drive design.

Can BC337-40,116 replace BC337-25 in an existing design?

Yes, BC337-40,116 can directly replace BC337-25 because both share identical package (SOT54A), voltage/current ratings (45 V/500 mA), and pinout. The higher h_FE (250–600 vs. 160–400) may reduce required base drive current but does not affect compatibility or safe operating area.

What is the thermal resistance of BC337-40,116?

The BC337-40,116 has a junction-to-ambient thermal resistance (R_th(j-a)) of 200 K/W when mounted on FR4 with standard single-sided copper. This value is specified in Table 7 of the Nexperia datasheet and is used to calculate junction temperature rise under load.

Is BC337-40,116 RoHS compliant and halogen-free?

Yes, BC337-40,116 meets RoHS Directive 2011/65/EU and is halogen-free per Nexperia's material declarations. The device carries the "H" suffix in compliance documentation and is manufactured in Malaysia (marked "t"), with full substance disclosure available in Nexperia's environmental reports.

BC337-40,116 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

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

Packaging:: Tape & Reel (TR)

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:: 250 @ 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

BC337-40,116 FAQ

1.How can I place an order for BC337-40,116 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC337-40,116 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 BC337-40,116 reliable?

The price and inventory of BC337-40,116 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC337-40,116 is usually 5 days.

3.What payment methods are accepted for BC337-40,116?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC337-40,116 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC337-40,116?

BC337-40,116 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC337-40,116 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 BC337-40,116?

For technical support, including BC337-40,116 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC337-40,116 requirements.

6.How does Aetrix verify that BC337-40,116 is sourced from the original manufacturer or authorized distributors?

All BC337-40,116 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 BC337-40,116 meets industry standards.

7.What is the process for return or replacement of BC337-40,116?

All BC337-40,116 units undergo pre-shipment inspection (PSI). If there is an issue with BC337-40,116, 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 BC337-40,116 part is unused and in its original packaging.

Return procedure for BC337-40,116:

1.Submit a request within 90 days.

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

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