2N3906-AP Equivalent & Substitute Parts

Part Overview

The 2N3906-AP is a PNP bipolar junction transistor (BJT) manufactured by Micro Commercial Co, designed for general-purpose switching and amplification applications. This device features a 40 V collector-emitter breakdown voltage, 200 mA maximum collector current, and 250 MHz transition frequency in a through-hole TO-92 package. The 2N3906-AP is classified as obsolete, necessitating identification of active equivalent parts that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Current - Collector (Ic) Max	200	mA
Voltage - Collector Emitter Breakdown (Max)	40	V
Vce Saturation (Max) @ Ib, Ic	400 mV @ 5 mA, 50 mA	—
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 10 mA, 1 V	—
Power - Max	600	mW
Frequency - Transition	250	MHz
Operating Temperature	-55 to 150	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	TO-92-3 (TO-226AA)	—

Substitute Part Grouping Explanation

Substitution of the 2N3906-AP is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

Transistor type: PNP configuration
Maximum collector current: 200 mA
Collector-emitter breakdown voltage: 40 V
DC current gain (hFE): minimum 100 @ 10 mA, 1 V
Transition frequency: 250 MHz
Operating temperature range: -55°C to 150°C

Mechanical Equivalence Criteria:

Mounting type: Through Hole
Package designation: TO-92-3 (TO-226AA) with formed leads

All substitute parts listed maintain identical electrical specifications and physical package compatibility with the 2N3906-AP. Variations in maximum power dissipation (625 mW versus 600 mW) and packaging format (bulk versus cut tape) do not affect functional substitution in circuit applications.

Parameter Comparison

Parameter	2N3906-AP (Micro Commercial Co)	2N3906TA (Fairchild)	2N3906TAR (onsemi)	2N3906TF (onsemi)	2N3906TFR (onsemi)
Transistor Type	PNP	PNP	PNP	PNP	PNP
Current - Collector (Ic) Max	200 mA	200 mA	200 mA	200 mA	200 mA
Voltage - Collector Emitter Breakdown (Max)	40 V	40 V	40 V	40 V	40 V
Vce Saturation (Max) @ Ib, Ic	400 mV @ 5 mA, 50 mA	400 mV @ 5 mA, 50 mA	400 mV @ 5 mA, 50 mA	400 mV @ 5 mA, 50 mA	400 mV @ 5 mA, 50 mA
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 10 mA, 1 V	100 @ 10 mA, 1 V	100 @ 10 mA, 1 V	100 @ 10 mA, 1 V	100 @ 10 mA, 1 V
Power - Max	600 mW	625 mW	625 mW	625 mW	625 mW
Frequency - Transition	250 MHz	250 MHz	250 MHz	250 MHz	250 MHz
Operating Temperature	-55 to 150°C (TJ)	-55 to 150°C (TJ)	-55 to 150°C (TJ)	-55 to 150°C (TJ)	-55 to 150°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Active Product Availability: All four substitute parts (2N3906TA, 2N3906TAR, 2N3906TF, 2N3906TFR) maintain active product status, ensuring long-term availability and supply chain continuity. The 2N3906-AP, classified as obsolete, should be replaced with one of these active equivalents for new designs and ongoing production.

Compliance and Certification: The 2N3906TAR, 2N3906TF, and 2N3906TFR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. All substitute parts carry EAR99 export classification and identical HTSUS tariff codes (8541.21.0075), ensuring regulatory consistency.

Manufacturer Selection:

Fairchild Semiconductor (2N3906TA): Bulk packaging format; 32,320 units in stock
onsemi (2N3906TAR, 2N3906TF, 2N3906TFR): Cut tape packaging; 9,200 to 1,300 units in stock

Selection between manufacturers and packaging formats depends on procurement volume requirements and assembly process specifications. All parts are electrically and mechanically interchangeable.

Frequently Asked Questions (FAQ)

Q: Can the 2N3906-AP be directly replaced with any of the listed substitute parts?

A: Yes. All substitute parts maintain identical electrical specifications (200 mA collector current, 40 V breakdown voltage, 250 MHz transition frequency, 100 minimum hFE) and physical package configuration (TO-92-3 through-hole). Direct pin-for-pin substitution is supported without circuit modification.

Q: What is the difference between 2N3906TA and the onsemi variants (2N3906TAR, 2N3906TF, 2N3906TFR)?

A: The primary differences are manufacturer (Fairchild versus onsemi) and packaging format (bulk versus cut tape). Electrical performance and package dimensions are identical. Selection depends on procurement requirements and assembly process compatibility.

Q: Why does the 2N3906-AP have a lower maximum power rating (600 mW) than the substitute parts (625 mW)?

A: The power rating difference does not affect substitution compatibility. All parts operate within the same thermal and electrical envelope for typical applications. The higher rating on substitute parts provides additional design margin.

Q: Are there any compliance or regulatory differences between the main part and substitutes?

A: The 2N3906-AP is ROHS3 compliant. The 2N3906TA compliance status is not specified in available data. The 2N3906TAR, 2N3906TF, and 2N3906TFR are confirmed ROHS3 compliant and REACH unaffected. All parts carry identical EAR99 export classification.

Q: What packaging formats are available for the substitute parts?

A: The 2N3906TA is supplied in bulk packaging. The 2N3906TAR, 2N3906TF, and 2N3906TFR are supplied in cut tape (CT) format. Both formats contain identical components; selection depends on assembly equipment and volume requirements.

Q: Is the TO-92-3 package physically identical across all parts?

A: Yes. All parts use the TO-92-3 (TO-226AA) package with formed leads, ensuring mechanical compatibility with existing PCB layouts and through-hole assembly processes.

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