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

onsemi BC337-16ZL1G

Name: BC337-16ZL1G
Brand: onsemi
SKU: BC337-16ZL1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BC337-16ZL1G

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 Long Body, Formed Leads

Datasheet:: BC337-16ZL1G.pdf

Description:: TRANS NPN 45V 0.8A TO92

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:9,596

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

Product details

Overview

BC337-16ZL1G from onsemi is an NPN silicon general-purpose amplifier transistor in TO-92 package, rated for 45 V_CEO, 800 mA continuous collector current, and DC current gain (h_FE) of 100–250 at I_C = 100 mA, V_CE = 1.0 V - used in low-voltage switching and linear amplification stages of power supplies, sensor interfaces, and LED drivers.

For engineers reviewing the BC337-16ZL1G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed h_FE binning (16-series), Pb-free TO-92 packaging, thermal resistance (R_JA = 200 °C/W), safe operating area limits, and compatibility with through-hole prototyping and industrial control PCBs.

Technical Context

The BC337-16ZL1G operates as a medium-power bipolar junction transistor optimized for linear amplification and saturated switching. Its h_FE range (100–250) ensures predictable base drive requirements across production lots, while V_CEO = 45 V and I_C = 800 mA support operation in 24 V and 36 V system rails.

Thermal design is constrained by R_JA = 200 °C/W (free-air) and R_JC = 83.3 °C/W, requiring heatsinking only above ~300 mW dissipation. The device exhibits f_T = 210 MHz and C_ob = 15 pF, enabling stable audio-frequency and low-speed digital switching up to ~10 MHz without oscillation risk.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - supports 24 V rail designs with ≥2× voltage margin against transients
I_C (continuous)	800 mA - drives relays, small solenoids, or LED strings directly without external buffering
h_FE @ 100 mA / 1 V	100–250 - enables consistent base resistor calculation for switch saturation across batches
V_CE(sat) @ 500 mA / 50 mA	≤0.7 V - minimizes conduction loss in low-side switching applications
f_T	210 MHz - sufficient for audio preamps and PWM signal conditioning up to 20 kHz
R_JA	200 °C/W - requires no heatsink below 312 mW ambient dissipation at 25 °C
P_D @ T_A = 25 °C	625 mW - defines maximum linear-mode power handling before thermal derating

Pinout & Package

BC337-16ZL1G uses the standard TO-92 (Case 29, Style 17) plastic package with 3 leads, lead spacing 2.54 mm, and body dimensions 4.45 × 5.20 × 4.19 mm (L × W × H). Pin 1 = Collector, Pin 2 = Base, Pin 3 = Emitter - verified per marking diagram and mechanical drawing on page 5 of BC337/D Rev. 5.

Pin/Terminal	Circuit Role	Design Meaning
1 (Collector)	Output current sink node	Connected to load return path; must handle full I_C and withstand V_CEO during cutoff
2 (Base)	Control input terminal	Receives current-limited drive (typically 1–10 mA); sensitive to ESD due to V_EBO = 5 V limit
3 (Emitter)	Reference and current source node	Common return for base drive and load; tied to ground or negative rail in low-side configurations

Key Features

Feature	Design Value
Guaranteed h_FE binning (16-series)	h_FE = 100–250 at I_C = 100 mA - eliminates need for batch-specific base resistor recalibration
Pb-free TO-92 packaging	RoHS-compliant construction with matte tin lead finish - compatible with lead-free reflow and wave soldering
Low V_CE(sat)	≤0.7 V at I_C/I_B = 10 - reduces power loss and self-heating in high-duty-cycle switching
High f_T / low C_ob	f_T = 210 MHz, C_ob = 15 pF - supports clean square-wave switching and wideband analog gain without compensation
Robust SOA	Second-breakdown-limited safe operating area up to 1000 mA at V_CE < 5 V - tolerates brief inductive kickback in relay drivers

Applications

Relay Driver Stage	LED Constant-Current Sink
Use Scenario: Driving 12 V/24 V electromagnetic relays in PLC I/O modules and HVAC controllers. IC Role / Device Role / Timing Role: Low-side switch controlling relay coil current with forced β = 10 for reliable saturation. Use Value: V_CE(sat) ≤ 0.7 V ensures < 700 mW coil power loss at 1 A, reducing thermal stress on PCB traces.	Use Scenario: Precision current sink for indicator LEDs and status lighting in industrial panels. IC Role / Device Role / Timing Role: Linear-mode current regulator using emitter-degeneration resistor and fixed base bias. Use Value: Tight h_FE binning (100–250) enables ±5% LED current accuracy without trimming.
Audio Pre-amplifier Input Stage	Microcontroller GPIO Buffer
Use Scenario: Low-noise voltage amplifier for piezoelectric sensors and electret microphone outputs. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with resistive bias network and emitter bypass capacitor. Use Value: f_T = 210 MHz provides >100× bandwidth margin at 20 kHz, ensuring flat frequency response.	Use Scenario: Level-shifting and current-boosting interface between 3.3 V MCU GPIO and 5 V logic peripherals. IC Role / Device Role / Timing Role: Digital inverter or buffer with Schmitt-trigger-compatible input threshold via base resistor divider. Use Value: V_CEO = 45 V allows safe operation with 5 V loads even under supply overshoot conditions.

Relay Driver Stage

LED Constant-Current Sink

Use Scenario: Driving 12 V/24 V electromagnetic relays in PLC I/O modules and HVAC controllers.

IC Role / Device Role / Timing Role: Low-side switch controlling relay coil current with forced β = 10 for reliable saturation.

Use Value: V_CE(sat) ≤ 0.7 V ensures < 700 mW coil power loss at 1 A, reducing thermal stress on PCB traces.

Use Scenario: Precision current sink for indicator LEDs and status lighting in industrial panels.

IC Role / Device Role / Timing Role: Linear-mode current regulator using emitter-degeneration resistor and fixed base bias.

Use Value: Tight h_FE binning (100–250) enables ±5% LED current accuracy without trimming.

Audio Pre-amplifier Input Stage

Microcontroller GPIO Buffer

Use Scenario: Low-noise voltage amplifier for piezoelectric sensors and electret microphone outputs.

IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with resistive bias network and emitter bypass capacitor.

Use Value: f_T = 210 MHz provides >100× bandwidth margin at 20 kHz, ensuring flat frequency response.

Use Scenario: Level-shifting and current-boosting interface between 3.3 V MCU GPIO and 5 V logic peripherals.

IC Role / Device Role / Timing Role: Digital inverter or buffer with Schmitt-trigger-compatible input threshold via base resistor divider.

Use Value: V_CEO = 45 V allows safe operation with 5 V loads even under supply overshoot conditions.

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
BC337-25ZL1G	Higher h_FE bin (160–400) - increases base current margin but raises sensitivity to leakage at high temperature	Better suited for low-drive microcontrollers (e.g., 1 mA base drive), less ideal for thermally constrained enclosures	Select when base drive is limited and thermal headroom exceeds 40 °C
MMBT3904LT1G	SOT-23 package (surface-mount), lower I_C = 200 mA, higher f_T = 300 MHz - smaller footprint but reduced power handling	Used in space-constrained portable electronics; not drop-in replaceable due to different package and pinout	Choose for automated assembly and high-density layouts where 200 mA load current suffices

Compared with BC337-25ZL1G and MMBT3904LT1G, the BC337-16ZL1G offers optimal balance of h_FE consistency, through-hole manufacturability, and 800 mA drive capability - making it preferred for industrial control boards requiring long-term reliability and serviceability.

Availability

BC337-16ZL1G is available at Aetrix Electronics and suitable for relay drivers, LED current sinks, audio preamplifiers, and microcontroller GPIO buffers requiring stable component supply, long-lifecycle support, and RoHS-compliant through-hole assembly.

Supply support for BC337-16ZL1G 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The BC337 series belongs to onsemi's legacy general-purpose bipolar transistor product line, designed for cost-sensitive, high-reliability linear and switching applications in industrial controls, power supplies, and signal conditioning circuits.

FAQ

What is the guaranteed h_FE range for BC337-16ZL1G?

The BC337-16ZL1G is binned to guarantee h_FE = 100–250 when tested at I_C = 100 mA and V_CE = 1.0 V. This range is confirmed in the "ON CHARACTERISTICS" table of the BC337/D Rev. 5 datasheet and applies specifically to the "16" suffix variant - not the base BC337 or other variants like BC337-25ZL1G. The BC337-16ZL1G maintains this specification across its qualified operating temperature range.

Is BC337-16ZL1G RoHS-compliant and lead-free?

Yes, BC337-16ZL1G is explicitly marked as Pb-free in the ordering information section of the BC337/D datasheet, with "G" suffix denoting RoHS-compliant packaging. It uses matte tin-plated leads and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), supporting both lead-free reflow and traditional wave soldering processes without special handling.

What is the maximum power dissipation for BC337-16ZL1G at 70°C ambient?

At T_A = 70°C, BC337-16ZL1G's maximum power dissipation is derated from 625 mW at 25°C by 5.0 mW/°C, resulting in P_D = 625 − (5.0 × (70 − 25)) = 400 mW. This value assumes free-air convection and no heatsink; actual dissipation must remain below this limit to avoid exceeding T_J = 150°C. The BC337-16ZL1G's R_JA = 200 °C/W confirms this derating slope.

Can BC337-16ZL1G be used in switching power supply feedback circuits?

Yes, BC337-16ZL1G is commonly used in optocoupler-based feedback paths of offline AC/DC adapters and DC/DC converters. Its V_CEO = 45 V, low C_ob = 15 pF, and f_T = 210 MHz enable stable closed-loop response up to ~500 kHz. However, the BC337-16ZL1G must be operated within its SOA limits - especially avoiding second breakdown during transient overloads - and is not rated for primary-side high-voltage switching.

What is the pin configuration for BC337-16ZL1G in TO-92 package?

When viewing the flat side of the BC337-16ZL1G TO-92 package with leads pointing downward, the pin order from left to right is: Pin 1 = Collector, Pin 2 = Base, Pin 3 = Emitter - matching the "MARKING DIAGRAM" and "STYLE 17" designation in the BC337/D Rev. 5 datasheet. This configuration is standardized across all BC337-x variants including BC337-16ZL1G and is critical for correct PCB layout and functional testing.

BC337-16ZL1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 Long Body, Formed Leads

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 800 mA

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

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

Current - Collector Cutoff (Max):: 100nA

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

Power - Max:: 625 mW

Frequency - Transition:: 210MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92 (TO-226)

BC337-16ZL1G FAQ

1.How can I place an order for BC337-16ZL1G through Aetrix?

Please submit a Request for Quotation (RFQ) for BC337-16ZL1G 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 BC337-16ZL1G reliable?

The price and inventory of BC337-16ZL1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC337-16ZL1G is usually 5 days.

3.What payment methods are accepted for BC337-16ZL1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC337-16ZL1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC337-16ZL1G?

BC337-16ZL1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC337-16ZL1G 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 BC337-16ZL1G?

For technical support, including BC337-16ZL1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC337-16ZL1G requirements.

6.How does Aetrix verify that BC337-16ZL1G is sourced from the original manufacturer or authorized distributors?

All BC337-16ZL1G 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 BC337-16ZL1G meets industry standards.

7.What is the process for return or replacement of BC337-16ZL1G?

All BC337-16ZL1G units undergo pre-shipment inspection (PSI). If there is an issue with BC337-16ZL1G, 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 BC337-16ZL1G part is unused and in its original packaging.

Return procedure for BC337-16ZL1G:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 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…

2026-09-02 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…