BD136-6-BP Equivalent & Substitute Parts

Part Overview

The BD136-6-BP is a PNP bipolar junction transistor manufactured by Micro Commercial Co, rated for 45 V collector-emitter breakdown voltage and 1.5 A maximum collector current in a TO-126 through-hole package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. Equivalent parts maintain identical electrical specifications, while substitute parts offer compatible performance within defined parameter tolerances for applications requiring PNP transistor functionality in this performance class.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	45	V
Current - Collector (Ic) (Max)	1.5	A
Power - Max	1.25	W
Vce Saturation (Max) @ Ib, Ic	500mV @ 50mA, 500mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	40 @ 150mA, 2V	—
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-225AA, TO-126-3	—

Substitute Part Grouping Explanation

Substitution of the BD136-6-BP is determined by strict adherence to the following electrical and mechanical parameters:

Direct Equivalents maintain all critical electrical specifications: 45 V collector-emitter breakdown voltage, 1.5 A maximum collector current, 1.25 W power dissipation, 500 mV saturation voltage at specified bias conditions, and 100 nA collector cutoff current. These parts are interchangeable in applications where the original BD136-6-BP specifications are required. Package compatibility (TO-126 or SOT-32-3 through-hole configurations) is maintained.

Similar Substitutes share the same collector current (1.5 A) and power rating (1.25 W) but feature elevated collector-emitter breakdown voltage (60 V instead of 45 V). These parts are suitable for applications where higher voltage capability provides design margin without compromising performance in circuits designed for 45 V operation. The increased voltage rating does not degrade functionality in lower-voltage applications.

Substitution eligibility is based on:

Transistor type (PNP)
Maximum collector current (1.5 A)
Maximum power dissipation (1.25 W)
Saturation voltage characteristics (500 mV @ specified conditions)
Collector cutoff current (100 nA)
Through-hole mounting configuration
Operating temperature range compatibility

Parameter Comparison

Part Number	Manufacturer	Product Status	Vce Breakdown (Max)	Ic (Max)	Power (Max)	hFE (Min) @ Ic, Vce	Package	Operating Temp
BD136-6-BP	Micro Commercial Co	Obsolete	45 V	1.5 A	1.25 W	40 @ 150mA, 2V	TO-126	-55 to 150°C
BD136	STMicroelectronics	Active	45 V	1.5 A	1.25 W	40 @ 150mA, 2V	SOT-32-3	-55 to 150°C
BD13610S	Fairchild Semiconductor	Active	45 V	1.5 A	1.25 W	63 @ 150mA, 2V	TO-126-3	-55 to 150°C
BD136G	onsemi	Active	45 V	1.5 A	1.25 W	40 @ 150mA, 2V	TO-126	-55 to 150°C
BD13810STU	Fairchild Semiconductor	Active	60 V	1.5 A	1.25 W	63 @ 150mA, 2V	TO-126-3	-55 to 150°C
BD13816STU	onsemi	Last Time Buy	60 V	1.5 A	1.25 W	100 @ 150mA, 2V	TO-126-3	-55 to 150°C

Engineering Selection Recommendations

Direct Equivalent Selection:

BD136G (onsemi) is the primary direct equivalent for BD136-6-BP replacement. This part maintains identical electrical specifications (45 V breakdown, 1.5 A collector current, 1.25 W power, 40 hFE minimum) and operates across the full temperature range (-55 to 150°C). Product status is Active with ROHS3 compliance and REACH unaffected designation, ensuring long-term availability and regulatory compliance.

BD136 (STMicroelectronics) provides an alternative direct equivalent with identical electrical performance and Active product status. The SOT-32-3 package offers the same through-hole mounting configuration as the original part. ROHS3 compliance and REACH unaffected status support regulatory requirements.

BD13610S (Fairchild Semiconductor) is a direct electrical equivalent with 45 V breakdown and 1.5 A rating. This part features enhanced DC current gain (63 hFE minimum versus 40), providing improved base drive efficiency. Active product status and TO-126-3 package configuration ensure compatibility.

Similar Substitute Selection:

BD13810STU (Fairchild Semiconductor) and BD13816STU (onsemi) are suitable for applications where elevated voltage capability (60 V breakdown) provides design margin. Both parts maintain 1.5 A collector current and 1.25 W power dissipation. BD13810STU offers Active status with 63 hFE minimum. BD13816STU carries Last Time Buy status, indicating limited future availability; selection should account for long-term supply requirements.

Selection priority is based on product status (Active preferred over Obsolete or Last Time Buy), regulatory compliance (ROHS3 and REACH status), and package availability. Direct equivalents are preferred for drop-in replacement applications; similar substitutes are appropriate where circuit design accommodates higher voltage ratings.

Frequently Asked Questions (FAQ)

Q: Can BD136G directly replace BD136-6-BP without circuit modification?

A: Yes. BD136G maintains identical electrical specifications: 45 V collector-emitter breakdown, 1.5 A maximum collector current, 1.25 W power dissipation, and 40 hFE minimum at specified bias conditions. The TO-126 through-hole package is mechanically compatible. No circuit modification is required.

Q: What is the difference between BD136 (STMicroelectronics) and BD136G (onsemi)?

A: Both parts are direct electrical equivalents with identical 45 V, 1.5 A, and 1.25 W ratings. The primary difference is package configuration: BD136 uses SOT-32-3 while BD136G uses TO-126. Both are through-hole packages suitable for the original application. Selection depends on PCB layout compatibility and supplier availability.

Q: Why are BD13810STU and BD13816STU listed as similar rather than direct substitutes?

A: These parts feature 60 V collector-emitter breakdown voltage compared to the 45 V specification of BD136-6-BP. While they maintain 1.5 A collector current and 1.25 W power dissipation, the elevated voltage rating classifies them as similar substitutes. They are suitable for applications where higher voltage capability is acceptable or beneficial for design margin.

Q: Is BD13610S a suitable replacement for BD136-6-BP?

A: Yes. BD13610S is a direct electrical equivalent with 45 V breakdown and 1.5 A rating. It features enhanced DC current gain (63 hFE minimum versus 40), which improves base drive efficiency without affecting circuit operation. The TO-126-3 package is mechanically compatible with the original part.

Q: What is the significance of product status (Active, Obsolete, Last Time Buy) in part selection?

A: Product status indicates availability and supply continuity. Active status ensures ongoing production and long-term availability. Obsolete status indicates discontinued production, requiring immediate transition to alternative parts. Last Time Buy status indicates limited remaining inventory; selection should account for future production requirements and lead times.

Q: Are all listed substitutes ROHS3 compliant?

A: BD136-6-BP, BD136 (STMicroelectronics), BD136G, and BD13816STU are explicitly ROHS3 compliant. BD13610S and BD13810STU do not specify ROHS3 status in provided data. Compliance verification with suppliers is recommended for applications with regulatory requirements.

Q: Can BD13816STU be used despite Last Time Buy status?

A: BD13816STU is functionally suitable as a similar substitute (60 V, 1.5 A, 1.25 W). However, Last Time Buy status indicates limited inventory and no future production. Selection should account for application requirements, production volume, and long-term supply strategy. Active-status alternatives (BD136G, BD13610S, BD13810STU) are preferred for ongoing production.

Q: What package types are available among the substitute parts?

A: Substitute parts are available in TO-126 and TO-126-3 through-hole packages, with one option in SOT-32-3. All are through-hole configurations suitable for PCB mounting. Package selection depends on PCB layout compatibility and lead spacing requirements. TO-126 and TO-126-3 are mechanically similar with identical pin functions.

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