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

onsemi BD13516S

Name: BD13516S
Brand: onsemi
SKU: BD13516S
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BD13516S

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-225AA, TO-126-3

Datasheet:: BD13516S.pdf

Description:: TRANS NPN 45V 1.5A TO-126-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BD13516S from Fairchild Semiconductor is an NPN epitaxial silicon transistor in TO-126 package, rated for 45 V V_CEO, 1.5 A DC collector current, and 12.5 W collector dissipation at T_C = 25°C, used in medium-power linear amplification and switching applications such as audio output stages and relay drivers.

For engineers reviewing the BD13516S datasheet, pinout, applications, or equivalent options, key selection factors include V_CEO/V_CBO rating, hFE classification (100–250), saturation voltage at 500 mA, thermal derating behavior, and complementary pairing with BD136.

Technical Context

This device operates as a medium-power bipolar junction transistor with fixed emitter-base-collector terminal assignment and DC current gain specified across three test conditions (IC = 5 mA, 150 mA, and 0.5 A). Its safe operating area is defined by pulsed and continuous power limits, with thermal resistance governed by case-to-ambient and case-to-junction characteristics.

The BD13516S exhibits V_CE(sat) ≤ 0.5 V at IC = 500 mA / IB = 50 mA and V_BE(on) ≈ 1.0 V under same bias, supporting reliable turn-on in low-voltage driver circuits. Its hFE3 classification (100–250) confirms suitability for linear gain stages requiring stable beta across moderate current ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum allowable collector-emitter voltage before breakdown in common-emitter configuration
I_C (DC)	1.5 A - Continuous collector current limit defining steady-state power handling capability
P_C (T_C=25°C)	12.5 W - Maximum power dissipation at case temperature of 25°C, requiring heatsinking above ambient
hFE3	100–250 - DC current gain at V_CE = 2 V, I_C = 150 mA, enabling predictable base drive design
V_CE(sat)	≤ 0.5 V - Collector-emitter voltage drop at I_C = 500 mA and I_B = 50 mA, minimizing conduction loss in switching mode
T_J	150 °C - Maximum junction temperature, setting thermal design margin for reliability under load

Pinout & Package

BD13516S is housed in a TO-126 plastic package with standardized lead configuration: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base. The package features a metal tab for mechanical mounting and thermal conduction to heatsinks.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current exit path for majority carriers	Connected to ground or low-impedance return; determines reference point for bias network
2 (Collector)	Current entry path for majority carriers	Connected to load and supply rail; carries full switched or amplified current
3 (Base)	Control electrode for minority carrier injection	Receives current-limited drive signal; small-signal input determining transistor conduction state

Key Features

Feature	Design Value
Complementary pairing	Designed as NPN counterpart to BD136 (PNP), enabling push-pull amplifier topologies
hFE classification	hFE3 bin (100–250) ensures consistent gain matching within production lots for analog gain stability
Thermal robustness	150°C max junction temperature supports operation in enclosed industrial enclosures with limited airflow
Low V_CE(sat)	≤0.5 V at rated switching current reduces power loss and self-heating during on-state operation

Applications

Audio Power Amplifier Output Stage	DC Motor Driver (Small Brushed)
Use Scenario: Final output stage in Class AB audio amplifiers delivering up to 10 W into 8 Ω loads. IC Role / Device Role / Timing Role: NPN power switch amplifying line-level signals with low distortion and thermal stability. Use Value: hFE3 range (100–250) enables precise quiescent current setting; 12.5 W P_C supports sustained output without thermal runaway.	Use Scenario: H-bridge half-bridge leg controlling direction and speed of 12 V brushed DC motors in automation systems. IC Role / Device Role / Timing Role: Medium-power NPN switch turning motor winding current on/off under microcontroller PWM control. Use Value: V_CEO = 45 V accommodates back-EMF spikes; V_CE(sat) ≤ 0.5 V minimizes resistive heating during PWM conduction.
Relay Driver Circuit	Linear Voltage Regulator Pass Element
Use Scenario: Driving 12 V/500 mA electromagnetic relays in PLC I/O modules and industrial control panels. IC Role / Device Role / Timing Role: Saturated switch interfacing logic-level control signals to inductive relay coils. Use Value: I_C = 1.5 A DC rating exceeds relay hold current; TO-126 tab allows direct heatsink attachment for repetitive switching.	Use Scenario: Series pass transistor in adjustable 3-terminal linear regulators supplying 1–2 A at ≤30 V differential. IC Role / Device Role / Timing Role: Continuously biased active element dissipating excess input-output voltage as heat. Use Value: P_C = 12.5 W at T_C = 25°C enables stable regulation under 2 A × 15 V = 30 W worst-case dissipation with proper heatsinking.

Audio Power Amplifier Output Stage

DC Motor Driver (Small Brushed)

Use Scenario: Final output stage in Class AB audio amplifiers delivering up to 10 W into 8 Ω loads.

IC Role / Device Role / Timing Role: NPN power switch amplifying line-level signals with low distortion and thermal stability.

Use Value: hFE3 range (100–250) enables precise quiescent current setting; 12.5 W P_C supports sustained output without thermal runaway.

Use Scenario: H-bridge half-bridge leg controlling direction and speed of 12 V brushed DC motors in automation systems.

IC Role / Device Role / Timing Role: Medium-power NPN switch turning motor winding current on/off under microcontroller PWM control.

Use Value: V_CEO = 45 V accommodates back-EMF spikes; V_CE(sat) ≤ 0.5 V minimizes resistive heating during PWM conduction.

Relay Driver Circuit

Linear Voltage Regulator Pass Element

Use Scenario: Driving 12 V/500 mA electromagnetic relays in PLC I/O modules and industrial control panels.

IC Role / Device Role / Timing Role: Saturated switch interfacing logic-level control signals to inductive relay coils.

Use Value: I_C = 1.5 A DC rating exceeds relay hold current; TO-126 tab allows direct heatsink attachment for repetitive switching.

Use Scenario: Series pass transistor in adjustable 3-terminal linear regulators supplying 1–2 A at ≤30 V differential.

IC Role / Device Role / Timing Role: Continuously biased active element dissipating excess input-output voltage as heat.

Use Value: P_C = 12.5 W at T_C = 25°C enables stable regulation under 2 A × 15 V = 30 W worst-case dissipation with proper heatsinking.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium-power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BD135G	Same electrical specs and TO-126 package; RoHS-compliant variant with green marking	No functional difference; identical pinout and thermal profile	Select BD135G for new designs requiring lead-free compliance without layout change
MJE13003	Higher V_CEO (400 V), lower hFE (min 5), TO-220 package, higher P_C (75 W)	Designed for high-voltage SMPS primary switches, not linear/audio use	Choose only if system requires >100 V blocking or >2 A average current; not drop-in for BD13516S

Compared with BD13516S, BD135G offers identical performance with environmental compliance, while MJE13003 trades gain and linearity for high-voltage ruggedness-making it unsuitable for audio or precision linear applications but viable in flyback converters where BD13516S would fail.

Availability

BD13516S is available at Aetrix Electronics and suitable for audio amplifiers, relay drivers, DC motor controls, and linear regulator designs requiring stable component supply with long-term industrial availability.

Supply support for BD13516S 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The BD13516S belongs to Fairchild's legacy medium-power bipolar transistor family, engineered for cost-effective, thermally robust linear and switching functions in consumer and industrial equipment.

FAQ

What is the pin configuration of BD13516S?

The BD13516S uses a standard TO-126 package with Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base when viewed with the flat side facing forward and leads downward. This configuration is consistent across the BD135/137/139 series and verified in Fairchild's Rev. A datasheet Figure "Package Dimensions".

Is BD13516S RoHS compliant?

BD13516S is a legacy part manufactured prior to RoHS enforcement and does not carry RoHS certification. For compliant alternatives, consider BD135G-a functionally identical, green-marked version with lead-free terminations and same TO-126 footprint.

What is the hFE classification for BD13516S?

The BD13516S is classified as hFE3, meaning its DC current gain falls within 100–250 when measured at V_CE = 2 V and I_C = 150 mA. This binning ensures tighter gain consistency than hFE1 (25–250) or hFE2 (25–160) variants in the same family.

Can BD13516S be used as a direct replacement for BD135?

Yes - BD13516S is a specific hFE3-binned version of the BD135, sharing identical absolute maximum ratings, electrical characteristics, TO-126 package, and pinout. It replaces generic BD135 in designs requiring guaranteed minimum hFE ≥100 at 150 mA collector current.

What thermal considerations apply to BD13516S in continuous operation?

At ambient temperature, BD13516S is limited to 1.25 W due to low natural convection; for full 12.5 W dissipation, a heatsink maintaining case temperature ≤25°C is mandatory. Derating begins at 25°C per the datasheet's "Power Derating" curve, reaching zero at 150°C case temperature.

BD13516S Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-225AA, TO-126-3

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 1.5 A

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

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

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 150mA, 2V

Power - Max:: 1.25 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-126-3

BD13516S FAQ

1.How can I place an order for BD13516S through Aetrix?

Please submit a Request for Quotation (RFQ) for BD13516S 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 BD13516S reliable?

The price and inventory of BD13516S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BD13516S is usually 5 days.

3.What payment methods are accepted for BD13516S?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BD13516S transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BD13516S?

BD13516S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BD13516S 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 BD13516S?

For technical support, including BD13516S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BD13516S requirements.

6.How does Aetrix verify that BD13516S is sourced from the original manufacturer or authorized distributors?

All BD13516S 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 BD13516S meets industry standards.

7.What is the process for return or replacement of BD13516S?

All BD13516S units undergo pre-shipment inspection (PSI). If there is an issue with BD13516S, 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 BD13516S part is unused and in its original packaging.

Return procedure for BD13516S:

1.Submit a request within 90 days.

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

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