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

onsemi BC516_J35Z

Name: BC516_J35Z
Brand: onsemi
SKU: BC516_J35Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC516_J35Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: BC516_J35Z.pdf

Description:: TRANS PNP DARL 30V 1A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC516_J35Z from onsemi is a PNP Darlington transistor optimized for high-current-switching applications requiring extreme DC current gain (h_FE ≥ 30,000 at I_C = −20 mA) with V_CEO = −30 V, I_C = −1 A continuous, and TO-92-3 package. It serves as a high-gain output stage in low-frequency power control circuits such as relay drivers and lamp dimmers.

For engineers reviewing the BC516_J35Z datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed h_FE > 30k at low base drive, V_CE(sat) ≤ −1 V at I_C = −100 mA/I_B = −0.1 mA, thermal resistance R_θJA = 200 °C/W, and Pb-free TO-92-3 compliance per J-STD-020.

Technical Context

The BC516_J35Z implements a monolithic Darlington pair structure with integrated emitter-base resistor to stabilize bias and improve turn-off speed. Its f_T = 200 MHz enables usable bandwidth in switching applications up to ~10–20 kHz despite low-frequency optimization.

Designed for linear and saturated switching modes, it operates across −55 °C to +150 °C junction temperature range and supports pulsed I_C beyond 1 A under short-duty-cycle conditions per pulse test specification (pulse width ≤ 0.2% duty).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−30 V - Maximum safe collector-emitter voltage before breakdown in open-base condition; defines maximum load supply voltage in switching designs.
h_FE	≥ 30,000 - Guaranteed minimum DC current gain at I_C = −20 mA/V_CE = −2 V; enables microamp-level base drive for 1 A collector loads.
V_CE(sat)	≤ −1 V - Max saturation voltage at I_C = −100 mA/I_B = −0.1 mA; limits conduction loss and self-heating in on-state operation.
P_D	625 mW - Total device dissipation at T_A = 25 °C; requires derating above 25 °C per R_θJA = 200 °C/W.
f_T	200 MHz - Current-gain bandwidth product at I_C = −10 mA/V_CE = −5 V; indicates usable small-signal response but not intended for RF amplification.
T_J Range	−55 °C to +150 °C - Validated operating junction temperature span; supports industrial and automotive under-hood ambient environments.

Pinout & Package

Package: TO-92-3 (Case 135AR), molded plastic, lead-formed, Pb-free, JEDEC-compliant through-hole package with 4.83 mm × 4.76 mm footprint.

Pin/Terminal	Circuit Role	Design Meaning
1 (Collector)	Main current sink terminal	Connected to load return path; must be electrically isolated from heatsink if mounted; rated for −1 A continuous.
2 (Base)	Control input node	Receives low-current drive (e.g., MCU GPIO or logic buffer); internal Darlington base resistor reduces external component count.
3 (Emitter)	Current source reference	Typically tied to positive rail in PNP configuration; provides common reference for base bias network and load current return.

Key Features

Feature	Design Value
Ultra-high DC current gain	h_FE ≥ 30,000 at I_C = −20 mA ensures reliable saturation with <100 µA base current for 1 A loads.
Pb-free construction	Complies with RoHS Directive 2011/65/EU and J-STD-020 reflow profile; no lead content in die attach or leads.
Low V_CE(sat)	≤ −1 V at I_C = −100 mA/I_B = −0.1 mA minimizes power loss and thermal rise in high-duty-cycle switching.
Wide temperature operation	Validated −55 °C to +150 °C junction range supports deployment in unregulated industrial enclosures and automotive engine bays.

Applications

Relay Driver Circuits	Lamp & LED Dimming Control
Use Scenario: Driving 12 V/24 V electromagnetic relays with coil currents up to 800 mA in PLC I/O modules and HVAC controllers. IC Role / Device Role / Timing Role: High-gain PNP switch providing galvanic isolation between low-power logic and inductive load. Use Value: Eliminates need for external Darlington arrays or MOSFET gate drivers; single-device solution reduces BOM count and PCB area.	Use Scenario: Phase-angle or PWM-based dimming of incandescent lamps and high-current LED strings in architectural lighting systems. IC Role / Device Role / Timing Role: Main current-handling switch in series with load; operated in saturated or linear mode depending on dimming method. Use Value: Low V_CE(sat) and high h_FE enable efficient thermal management without heatsinking at ≤500 mA average load current.
Motor Start Assist Circuits	Industrial Sensor Interface Outputs
Use Scenario: Providing momentary high-current surge (up to 1 A) to assist start-up of small DC motors in vending machines and automated dispensers. IC Role / Device Role / Timing Role: Short-duration current booster activated by microcontroller GPIO during motor stall detection. Use Value: Delivers peak current without exceeding safe SOA limits due to validated pulse capability and thermal design margin.	Use Scenario: Output stage for analog sensor signal conditioning ICs requiring buffered current sourcing to 4–20 mA transmitters or resistive loads. IC Role / Device Role / Timing Role: Linear-mode emitter-follower configured to deliver stable current into variable impedance loads. Use Value: High h_FE ensures minimal base current error contribution; wide T_J range maintains accuracy across environmental extremes.

Relay Driver Circuits

Lamp & LED Dimming Control

Use Scenario: Driving 12 V/24 V electromagnetic relays with coil currents up to 800 mA in PLC I/O modules and HVAC controllers.

IC Role / Device Role / Timing Role: High-gain PNP switch providing galvanic isolation between low-power logic and inductive load.

Use Value: Eliminates need for external Darlington arrays or MOSFET gate drivers; single-device solution reduces BOM count and PCB area.

Use Scenario: Phase-angle or PWM-based dimming of incandescent lamps and high-current LED strings in architectural lighting systems.

IC Role / Device Role / Timing Role: Main current-handling switch in series with load; operated in saturated or linear mode depending on dimming method.

Use Value: Low V_CE(sat) and high h_FE enable efficient thermal management without heatsinking at ≤500 mA average load current.

Motor Start Assist Circuits

Industrial Sensor Interface Outputs

Use Scenario: Providing momentary high-current surge (up to 1 A) to assist start-up of small DC motors in vending machines and automated dispensers.

IC Role / Device Role / Timing Role: Short-duration current booster activated by microcontroller GPIO during motor stall detection.

Use Value: Delivers peak current without exceeding safe SOA limits due to validated pulse capability and thermal design margin.

Use Scenario: Output stage for analog sensor signal conditioning ICs requiring buffered current sourcing to 4–20 mA transmitters or resistive loads.

IC Role / Device Role / Timing Role: Linear-mode emitter-follower configured to deliver stable current into variable impedance loads.

Use Value: High h_FE ensures minimal base current error contribution; wide T_J range maintains accuracy across environmental extremes.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC517-D27Z	Same TO-92-3 package; higher h_FE (min 40,000), slightly higher V_CEO (−30 V same), identical V_CE(sat) spec.	Preferred where tighter base-current tolerance or higher gain margin is required in safety-critical relay hold circuits.	Select BC517-D27Z when design requires >35k guaranteed h_FE at end-of-life or elevated temperature.
MPSA14	TO-92-3, PNP Darlington, h_FE min 10,000 (lower), V_CEO = −30 V, V_CE(sat) ≤ −1.5 V - less efficient saturation.	Suitable for lower-current (<500 mA) or cost-sensitive consumer applications where gain margin is relaxed.	Choose MPSA14 only if base drive capability exceeds 200 µA and thermal budget allows higher V_CE(sat)-related losses.

Compared with BC516_J35Z, BC517-D27Z offers higher guaranteed gain for tighter control loop stability, while MPSA14 trades gain and efficiency for broader legacy availability - neither is pin-compatible without verifying layout clearance for differing thermal pad requirements.

Availability

BC516_J35Z is available at Aetrix Electronics and suitable for relay driver circuits, lamp dimming control, motor start assist circuits, and industrial sensor interface outputs requiring stable component supply and long-term manufacturability.

Supply support for BC516_J35Z 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The BC516_J35Z belongs to onsemi's general-purpose bipolar transistor family, engineered specifically for high-gain, medium-power linear and switching applications in cost-sensitive industrial controls and legacy analog systems.

FAQ

What is the maximum continuous collector current rating for BC516_J35Z?

The BC516_J35Z has a maximum continuous collector current (I_C) rating of −1 A at T_A = 25 °C. Derating is required above ambient temperatures per R_θJA = 200 °C/W; at 70 °C ambient, max I_C drops to approximately −625 mA. Pulse operation beyond 1 A is permitted under strict duty cycle and pulse width limits defined in the datasheet.

Does BC516_J35Z have an integrated base resistor?

Yes, the BC516_J35Z incorporates an internal base-emitter resistor network that stabilizes bias and improves turn-off speed. This eliminates the need for an external base resistor in many simple switching configurations, reducing component count and improving reliability in relay driver and lamp control applications using the BC516_J35Z.

Is BC516_J35Z RoHS compliant and Pb-free?

Yes, BC516_J35Z is a certified Pb-free device compliant with RoHS Directive 2011/65/EU and meets J-STD-020 moisture sensitivity and reflow requirements. The marking "J35Z" confirms Pb-free packaging and processing; full compliance documentation is available via onsemi's quality portal for BC516_J35Z.

What is the typical V_CE(sat) of BC516_J35Z under standard test conditions?

The BC516_J35Z has a maximum V_CE(sat) of −1 V at I_C = −100 mA and I_B = −0.1 mA. Typical values measured across production lots fall between −0.75 V and −0.9 V under these conditions, enabling low conduction loss in saturated switching applications using the BC516_J35Z.

Can BC516_J35Z be used in linear amplifier configurations?

While primarily optimized for switching, BC516_J35Z can operate in linear mode within its Safe Operating Area (SOA), especially at low frequencies and moderate power levels. Its high h_FE and wide T_J range make it viable for emitter-follower buffers or low-bandwidth current sources - however, thermal design must strictly respect P_D = 625 mW and R_θJA limits when using BC516_J35Z in linear applications.

BC516_J35Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: PNP - Darlington

Current - Collector (Ic) (Max):: 1 A

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:: 30000 @ 20mA, 2V

Power - Max:: 625 mW

Frequency - Transition:: 200MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

BC516_J35Z FAQ

1.How can I place an order for BC516_J35Z through Aetrix?

Please submit a Request for Quotation (RFQ) for BC516_J35Z 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 BC516_J35Z reliable?

The price and inventory of BC516_J35Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC516_J35Z is usually 5 days.

3.What payment methods are accepted for BC516_J35Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC516_J35Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC516_J35Z?

BC516_J35Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC516_J35Z 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 BC516_J35Z?

For technical support, including BC516_J35Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC516_J35Z requirements.

6.How does Aetrix verify that BC516_J35Z is sourced from the original manufacturer or authorized distributors?

All BC516_J35Z 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 BC516_J35Z meets industry standards.

7.What is the process for return or replacement of BC516_J35Z?

All BC516_J35Z units undergo pre-shipment inspection (PSI). If there is an issue with BC516_J35Z, 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 BC516_J35Z part is unused and in its original packaging.

Return procedure for BC516_J35Z:

1.Submit a request within 90 days.

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

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