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

onsemi BD1386S

Name: BD1386S
Brand: onsemi
SKU: BD1386S
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BD1386S

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: BD1386S.pdf

Description:: TRANS PNP 60V 1.5A TO-126-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BD1386S from Fairchild Semiconductor is a PNP epitaxial silicon transistor in TO-126 package, rated for -60 V V_CEO, -1.5 A DC collector current, 12.5 W collector dissipation at T_C=25°C, and 150°C junction temperature, used in medium-power linear amplification and switching applications such as audio output stages and relay drivers.

For engineers reviewing the BD1386S datasheet, pinout, applications, or equivalent options, key selection considerations include its V_CEO = -60 V rating, h_FE range of 63–160 at I_C = -150 mA, V_CE(sat) ≤ -0.5 V at I_C = -500 mA / I_B = -50 mA, thermal derating above 25°C case temperature, and complementary pairing with BD137.

Technical Context

This PNP bipolar junction transistor operates in active, saturation, and cutoff regions with defined safe operating area (SOA) limits across pulse and DC conditions. Its h_FE classification (63–160) is specified at V_CE = -2 V and I_C = -150 mA, and V_CE(sat) is guaranteed ≤ -0.5 V under forced beta = 10.

The device features low leakage: I_CBO ≤ -0.1 µA at V_CB = -30 V and I_EBO ≤ -10 µA at V_EB = -5 V. Thermal performance is characterized by 12.5 W power dissipation at T_C = 25°C, derating linearly to zero at T_C = 175°C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-60 V - Maximum sustainable collector-emitter voltage before breakdown in common-emitter configuration
I_C (DC)	-1.5 A - Continuous collector current limit defining linear/saturation operation envelope
P_C (T_C=25°C)	12.5 W - Maximum steady-state power dissipation at heatsink-mounted case temperature
h_FE	63–160 - DC current gain range at V_CE = -2 V, I_C = -150 mA, critical for bias stability in amplifier designs
V_CE(sat)	≤ -0.5 V - Saturation voltage at I_C = -500 mA / I_B = -50 mA, determining conduction loss in switching use
T_J	150°C - Absolute maximum junction temperature, constraining thermal design margin
V_BE(on)	-1.0 V - Base-emitter forward voltage at V_CE = -2 V, I_C = -0.5 A, used for base drive calculation

Pinout & Package

BD1386S is housed in a TO-126 plastic package with integral metal tab for heatsinking. Pin 1 is Emitter, Pin 2 is Collector (connected to tab), Pin 3 is Base - standard configuration for medium-power PNP transistors in this family.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current exit terminal in PNP operation	Connected to most positive rail in common-emitter switch/amplifier; requires low-impedance return path
2 (Collector)	Current entry terminal; electrically tied to metal tab	Must be thermally coupled to heatsink; electrically common with mounting surface - isolation required if heatsink is grounded
3 (Base)	Control terminal for minority-carrier injection	Driven with negative current relative to emitter; requires series resistor to limit I_B ≤ -0.5 A absolute max

Key Features

Feature	Design Value
Complementary pairing	Designed as PNP counterpart to BD137 NPN, enabling push-pull output stages without gain mismatch
Medium-power SOA	Defined safe operating area supports both linear (audio) and switching (relay, lamp) loads up to 12.5 W with proper heatsinking
Low leakage	I_CBO ≤ -0.1 µA ensures minimal off-state current in high-impedance bias networks
Thermal robustness	150°C T_J(max) and linear derating allow reliable operation in industrial ambient up to 70°C with adequate heatsink

Applications

Audio Power Amplifier Output Stage	DC Motor Driver (Low-Side Switch)
Use Scenario: Final output stage in Class-B or AB audio amplifiers delivering up to 10 W into 8 Ω loads. IC Role / Device Role / Timing Role: PNP output transistor conducting during negative half-cycle; paired with BD137 for symmetrical swing. Use Value: h_FE = 63–160 ensures stable quiescent current setting; V_CE(sat) ≤ -0.5 V minimizes crossover distortion and thermal load.	Use Scenario: Driving 12 V brushed DC motors (e.g., automotive HVAC actuators) with PWM control. IC Role / Device Role / Timing Role: Low-side PNP switch sinking motor current when base is pulled low relative to emitter. Use Value: I_C = -1.5 A DC rating handles stall currents; TO-126 tab enables direct heatsink mounting for intermittent 3 A pulse loads.
Relay Driver Circuit	Linear Voltage Regulator Pass Element
Use Scenario: Driving 24 V/500 mA electromagnetic relays in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Saturated PNP switch interfacing microcontroller GPIO to relay coil via base resistor. Use Value: V_CEO = -60 V provides 2.5× safety margin over 24 V supply; low V_CE(sat) reduces coil power loss and self-heating.	Use Scenario: Series pass element in adjustable linear regulators supplying 5–12 V at up to 1 A for analog sensor subsystems. IC Role / Device Role / Timing Role: PNP pass transistor controlled by error amplifier to regulate output voltage. Use Value: High h_FE reduces base drive current demand; 12.5 W P_C supports >5 W dissipation at 1 A × 5 V dropout with heatsink.

Audio Power Amplifier Output Stage

DC Motor Driver (Low-Side Switch)

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

IC Role / Device Role / Timing Role: PNP output transistor conducting during negative half-cycle; paired with BD137 for symmetrical swing.

Use Value: h_FE = 63–160 ensures stable quiescent current setting; V_CE(sat) ≤ -0.5 V minimizes crossover distortion and thermal load.

Use Scenario: Driving 12 V brushed DC motors (e.g., automotive HVAC actuators) with PWM control.

IC Role / Device Role / Timing Role: Low-side PNP switch sinking motor current when base is pulled low relative to emitter.

Use Value: I_C = -1.5 A DC rating handles stall currents; TO-126 tab enables direct heatsink mounting for intermittent 3 A pulse loads.

Relay Driver Circuit

Linear Voltage Regulator Pass Element

Use Scenario: Driving 24 V/500 mA electromagnetic relays in industrial PLC I/O modules.

IC Role / Device Role / Timing Role: Saturated PNP switch interfacing microcontroller GPIO to relay coil via base resistor.

Use Value: V_CEO = -60 V provides 2.5× safety margin over 24 V supply; low V_CE(sat) reduces coil power loss and self-heating.

Use Scenario: Series pass element in adjustable linear regulators supplying 5–12 V at up to 1 A for analog sensor subsystems.

IC Role / Device Role / Timing Role: PNP pass transistor controlled by error amplifier to regulate output voltage.

Use Value: High h_FE reduces base drive current demand; 12.5 W P_C supports >5 W dissipation at 1 A × 5 V dropout with heatsink.

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
MJD13005	V_CEO = -60 V, I_C = -1.5 A, but h_FE min = 20 (vs. BD1386S min = 63); TO-252 package, no metal tab	Lacks integrated heatsink tab; requires PCB copper pour or external heatsink for same thermal performance	Prefer BD1386S where mechanical mounting to chassis heatsink is required or h_FE consistency is critical
BC639	V_CEO = -45 V, I_C = -1 A, h_FE = 40–250; TO-92 package, 0.5 W P_C	Lower voltage/current rating and power dissipation; unsuitable for >500 mW continuous loads	Select BD1386S for applications requiring >1 A DC current or >1 W dissipation with TO-126 mechanical robustness

Compared with MJD13005 and BC639, BD1386S offers higher guaranteed h_FE, integrated heatsink interface via TO-126 tab, and superior SOA for linear operation - making it preferred for audio output and regulated power stages where thermal management and gain stability are critical.

Availability

BD1386S is available at Aetrix Electronics and suitable for audio amplifier output stages, relay driver circuits, DC motor control, and linear regulator pass elements requiring stable component supply and long-term industrial availability.

Supply support for BD1386S 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 discrete devices, analog ICs, and interface solutions before its acquisition by ON Semiconductor in 2016.

The BD1386S belongs to Fairchild's legacy medium-power bipolar transistor family designed for industrial linear amplification and robust switching in non-automotive, non-life-critical equipment.

FAQ

What is the maximum continuous collector current rating for BD1386S?

The BD1386S has a maximum DC collector current rating of -1.5 A at T_C = 25°C. This rating assumes proper heatsinking; current must be reduced per the linear derating curve above 25°C case temperature. Pulse current capability is -3.0 A with 2% duty cycle and 350 µs pulse width, as specified in the Absolute Maximum Ratings table of the BD1386S datasheet.

Is BD1386S pin-compatible with BD137?

No, BD1386S is not pin-compatible with BD137. BD1386S is a PNP transistor in TO-126 package with pinout Emitter–Collector–Base (1–2–3), while BD137 is an NPN device with identical physical package and pinout order - meaning their electrical polarity and biasing requirements differ, though they share mechanical mounting compatibility for complementary circuit layouts.

What is the guaranteed h_FE range for BD1386S at I_C = -150 mA?

The BD1386S is classified for h_FE3 with a guaranteed range of 63 to 160 at V_CE = -2 V and I_C = -150 mA. This specification is explicitly stated in the "hFE Classification" table of the BD1386S datasheet and defines the minimum and maximum DC current gain usable for bias design in linear amplifier or switching applications.

Can BD1386S be used in place of BD140?

No - BD1386S is functionally equivalent to BD138 (V_CEO = -60 V), not BD140 (V_CEO = -80 V). Substituting BD1386S for BD140 risks overvoltage failure in circuits where collector-emitter voltage exceeds -60 V. BD1386S and BD140 belong to the same family but have distinct voltage ratings and h_FE classifications; always verify V_CEO, V_CBO, and gain binning before substitution.

Does BD1386S require a heatsink in typical switching applications?

Yes, BD1386S requires a heatsink in any application dissipating more than ~1 W continuously. With P_C = 12.5 W at T_C = 25°C and thermal resistance θ_JC ≈ 10°C/W (inferred from package type), even 2 W dissipation raises junction temperature by ~20°C above case - exceeding safe margins without thermal management. The TO-126 metal tab is designed for direct heatsink attachment, and omission risks thermal runaway or premature failure.

BD1386S Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: PNP

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

Voltage - Collector Emitter Breakdown (Max):: 60 V

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

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 40 @ 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

BD1386S FAQ

1.How can I place an order for BD1386S through Aetrix?

Please submit a Request for Quotation (RFQ) for BD1386S 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 BD1386S reliable?

The price and inventory of BD1386S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BD1386S is usually 5 days.

3.What payment methods are accepted for BD1386S?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BD1386S transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BD1386S?

BD1386S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BD1386S 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 BD1386S?

For technical support, including BD1386S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BD1386S requirements.

6.How does Aetrix verify that BD1386S is sourced from the original manufacturer or authorized distributors?

All BD1386S 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 BD1386S meets industry standards.

7.What is the process for return or replacement of BD1386S?

All BD1386S units undergo pre-shipment inspection (PSI). If there is an issue with BD1386S, 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 BD1386S part is unused and in its original packaging.

Return procedure for BD1386S:

1.Submit a request within 90 days.

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

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