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

onsemi BD13610STU

Name: BD13610STU
Brand: onsemi
SKU: BD13610STU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BD13610STU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: BD13610STU.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BD13610STU from Fairchild Semiconductor is a PNP epitaxial silicon transistor in TO-126 package, rated for -45 V V_CEO, -1.5 A continuous collector current, and 12.5 W case power 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 BD13610STU datasheet, pinout, applications, or equivalent options, key selection criteria include verified V_CEO/V_CBO ratings, hFE classification (hFE3 = 40–100), V_CE(sat) at -500 mA/-50 mA, thermal derating behavior, and TO-126 mechanical compatibility with heatsink mounting.

Technical Context

This PNP bipolar junction transistor operates in active, saturation, and cutoff regions with DC current gain specified across three test conditions: hFE1 (IC = -5 mA), hFE2 (IC = -0.5 A), and hFE3 (IC = -150 mA). Its safe operating area (SOA) is defined for pulsed and continuous operation, with power derating starting at T_C > 25°C.

The device features low V_CE(sat) of -0.5 V at IC = -500 mA and IB = -50 mA, and V_BE(on) of -1.0 V under same conditions. Cutoff leakage is tightly controlled: ICBO ≤ -0.1 µA at VCB = -30 V and IE = 0.

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 rating defining steady-state conduction capability
P_C (T_C=25°C)	12.5 W - Maximum power dissipation at case temperature 25°C, requiring heatsink for full-load operation
hFE3	40–100 - DC current gain at V_CE = -2 V, I_C = -150 mA, critical for bias stability in linear amplifiers
V_CE(sat)	-0.5 V - Saturation voltage at I_C = -500 mA / I_B = -50 mA, directly impacts switching loss and voltage headroom
T_J	150 °C - Maximum junction temperature limit, governing thermal design margin and reliability lifetime

Pinout & Package

BD13610STU uses the TO-126 plastic power package with integral metal tab for heatsink attachment. Pin 1 is Emitter, Pin 2 is Collector, Pin 3 is Base - confirmed by Fairchild's official package outline and marking diagram.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current exit path for PNP device	Connected to most positive rail in common-emitter switch or to load return in amplifier output stage
2 (Collector)	Current entry path for PNP device	Connected to load or supply rail; electrically tied to metal tab for thermal conduction and electrical grounding if mounted to chassis
3 (Base)	Control terminal for minority-carrier injection	Requires negative base current relative to emitter to turn on; drive circuit must sink current

Key Features

Feature	Design Value
Medium-power PNP BJT	Enables discrete high-current switching and Class-A/B audio amplification without integrated driver complexity
TO-126 thermally optimized package	Supports up to 12.5 W dissipation with external heatsink, enabling compact board-level power handling
hFE3 classification (40–100)	Ensures predictable DC biasing in linear circuits and consistent gain matching across production lots
V_CE(sat) ≤ -0.5 V @ -500 mA	Minimizes conduction loss and self-heating during saturated switching, improving efficiency in relay/LED drivers

Applications

Audio Power Amplifier Output Stage	DC Motor Driver (Low-Side Switch)
Use Scenario: Final push-pull stage in 5–10 W audio amplifier delivering signal to 4–8 Ω speaker load. IC Role / Device Role / Timing Role: PNP complement to NPN BD135, providing negative half-cycle amplification in Class-B topology. Use Value: Delivers -1.5 A peak current with <0.5 V saturation drop, minimizing distortion and thermal stress at rated output power.	Use Scenario: Low-side switch controlling 12 V DC brushed motor with stall current ≤1.2 A. IC Role / Device Role / Timing Role: Saturated PNP switch sinking motor return current when base is pulled low. Use Value: Enables simple TTL/CMOS-compatible drive (via base resistor) while maintaining robust SOA under inductive kickback.
Relay Driver Circuit	Linear Voltage Regulator Pass Element
Use Scenario: Driving 24 V, 400 mW electromagnetic relay coil requiring ~17 mA holding current. IC Role / Device Role / Timing Role: High-gain PNP switch turning relay ON/OFF via microcontroller GPIO. Use Value: hFE ≥40 ensures full saturation with ≤500 µA base drive, reducing MCU I/O loading and PCB space.	Use Scenario: Series pass element in adjustable 3–24 V, 1 A linear regulator using LM317 feedback network. IC Role / Device Role / Timing Role: PNP pass transistor configured in emitter-follower mode to extend output current and improve regulation. Use Value: 12.5 W T_C-limited dissipation supports 1 A × 10 V dropout = 10 W worst-case, within safe thermal margin.

Audio Power Amplifier Output Stage

DC Motor Driver (Low-Side Switch)

Use Scenario: Final push-pull stage in 5–10 W audio amplifier delivering signal to 4–8 Ω speaker load.

IC Role / Device Role / Timing Role: PNP complement to NPN BD135, providing negative half-cycle amplification in Class-B topology.

Use Value: Delivers -1.5 A peak current with <0.5 V saturation drop, minimizing distortion and thermal stress at rated output power.

Use Scenario: Low-side switch controlling 12 V DC brushed motor with stall current ≤1.2 A.

IC Role / Device Role / Timing Role: Saturated PNP switch sinking motor return current when base is pulled low.

Use Value: Enables simple TTL/CMOS-compatible drive (via base resistor) while maintaining robust SOA under inductive kickback.

Relay Driver Circuit

Linear Voltage Regulator Pass Element

Use Scenario: Driving 24 V, 400 mW electromagnetic relay coil requiring ~17 mA holding current.

IC Role / Device Role / Timing Role: High-gain PNP switch turning relay ON/OFF via microcontroller GPIO.

Use Value: hFE ≥40 ensures full saturation with ≤500 µA base drive, reducing MCU I/O loading and PCB space.

Use Scenario: Series pass element in adjustable 3–24 V, 1 A linear regulator using LM317 feedback network.

IC Role / Device Role / Timing Role: PNP pass transistor configured in emitter-follower mode to extend output current and improve regulation.

Use Value: 12.5 W T_C-limited dissipation supports 1 A × 10 V dropout = 10 W worst-case, within safe thermal margin.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BD136G	Same V_CEO/I_C/package; hFE3 = 63–160 (wider spread); RoHS-compliant variant	Higher hFE range increases risk of overdrive in fixed-bias switches; preferred where tighter gain control not required	Select BD136G for new designs requiring RoHS compliance and broader hFE tolerance
MJD127	TO-252 (DPAK) package; V_CEO = -100 V; I_C = -2 A; hFE3 = 30–120; higher voltage rating, surface-mount only	Not pin-compatible; requires PCB redesign; suited for higher-voltage industrial controls where BD13610STU's -45 V is marginal	Choose MJD127 only when -100 V V_CEO or SMT assembly is mandatory

Compared with BD136G and MJD127, BD13610STU offers verified -45 V/1.5 A performance in through-hole TO-126 with documented hFE3 = 40–100, making it optimal for cost-sensitive, serviceable, and thermally managed medium-power linear or switching circuits where leaded mounting and precise gain control are prioritized.

Availability

BD13610STU is available at Aetrix Electronics and suitable for audio amplifiers, relay drivers, DC motor controls, and linear regulator designs requiring stable component supply and long-term obsolescence management.

Supply support for BD13610STU 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 designer and manufacturer of analog and discrete semiconductors, acquired by ON Semiconductor in 2016; known for robust power transistors and industry-standard logic families.

BD13610STU belongs to the BD136/138/140 family of medium-power PNP transistors engineered for linear amplification and switching in consumer, industrial, and automotive auxiliary systems where reliability and thermal performance are critical.

FAQ

What is the maximum continuous collector current rating for BD13610STU?

The BD13610STU has a maximum continuous collector current (I_C) rating of -1.5 A at T_C = 25°C. This value decreases with rising case temperature per the published derating curve, and operation above this current requires verification against the Safe Operating Area (SOA) graph in the BD13610STU datasheet to avoid secondary breakdown.

Is BD13610STU pin-compatible with BD135?

Yes, BD13610STU is the PNP complement to the NPN BD135 and shares identical TO-126 pinout (Emitter-Collector-Base), enabling direct pairing in push-pull amplifier or H-bridge driver configurations without layout changes. Both devices are specified for matched V_CEO and I_C ratings.

What is the hFE classification for BD13610STU?

BD13610STU is classified under hFE3, with a guaranteed DC current gain range of 40 to 100 when measured at V_CE = -2 V and I_C = -150 mA. This classification is explicitly stated in the Fairchild BD136/138/140 datasheet Rev. A and applies to BD13610STU as a member of the BD136 variant group.

Does BD13610STU require a heatsink in normal operation?

BD13610STU dissipates up to 12.5 W at T_C = 25°C, but its 1.25 W rating at T_A = 25°C means ambient-only operation is limited to very low power levels. For any sustained I_C > 200 mA or V_CE > 5 V, a heatsink is required to maintain T_J ≤ 150°C - confirmed by the thermal derating curve in the BD13610STU datasheet.

What is the collector-emitter saturation voltage V_CE(sat) for BD13610STU?

The BD13610STU has a maximum V_CE(sat) of -0.5 V when tested at I_C = -500 mA and I_B = -50 mA. This parameter is critical for estimating conduction loss in switching applications and is validated across production lots per the Absolute Maximum Ratings table in the official Fairchild datasheet.

BD13610STU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: PNP

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:: 63 @ 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

BD13610STU FAQ

1.How can I place an order for BD13610STU through Aetrix?

Please submit a Request for Quotation (RFQ) for BD13610STU 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 BD13610STU reliable?

The price and inventory of BD13610STU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BD13610STU is usually 5 days.

3.What payment methods are accepted for BD13610STU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BD13610STU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BD13610STU?

BD13610STU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BD13610STU 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 BD13610STU?

For technical support, including BD13610STU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BD13610STU requirements.

6.How does Aetrix verify that BD13610STU is sourced from the original manufacturer or authorized distributors?

All BD13610STU 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 BD13610STU meets industry standards.

7.What is the process for return or replacement of BD13610STU?

All BD13610STU units undergo pre-shipment inspection (PSI). If there is an issue with BD13610STU, 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 BD13610STU part is unused and in its original packaging.

Return procedure for BD13610STU:

1.Submit a request within 90 days.

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

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