2N3906RLRAG Equivalent & Substitute Parts

Part Overview

The 2N3906RLRAG is a PNP bipolar junction transistor manufactured by onsemi, rated for 40 V collector-emitter breakdown voltage and 200 mA maximum collector current. This device is packaged in a TO-92 through-hole configuration and is suitable for general-purpose switching and amplification applications operating across a temperature range of -55°C to 150°C.

The 2N3906RLRAG is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production and repair requirements for systems utilizing this transistor.

Key Parameters

Parameter	Value	Unit
Transistor Type	PNP	—
Voltage - Collector Emitter Breakdown (Max)	40	V
Current - Collector (Ic) (Max)	200	mA
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	625	mW
Frequency - Transition	250	MHz
Operating Temperature	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-226-3, TO-92-3	—

Substitute Part Grouping Explanation

Substitute parts for the 2N3906RLRAG are identified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Matching Parameters:

Transistor Type: PNP
Voltage - Collector Emitter Breakdown (Max): 40 V
Current - Collector (Ic) (Max): 200 mA
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: 625 mW (or equivalent)
Frequency - Transition: 250 MHz
Operating Temperature: -55°C to 150°C
Mounting Type: Through Hole
Package / Case: TO-92-3 or TO-226-3

Direct Substitutes are parts manufactured by different suppliers or with different packaging designations that meet all critical electrical and mechanical parameters. These parts are functionally interchangeable with the 2N3906RLRAG.

Similar Parts are transistors that share the same base product family but may have variations in specific parameters such as saturation voltage, current gain conditions, or transition frequency. These parts require circuit-level evaluation for compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Ic (Max) mA	Vce Breakdown (Max) V	Vce Sat (Max) mV	hFE (Min)	Power (Max) mW	Frequency (Max) MHz	Package
2N3906RLRAG	onsemi	Obsolete	200	40	400 @ 5mA, 50mA	100 @ 10mA, 1V	625	250	TO-92-3
2N3906TA	Fairchild Semiconductor	Active	200	40	400 @ 5mA, 50mA	100 @ 10mA, 1V	625	250	TO-92-3
2N3906TAR	onsemi	Active	200	40	400 @ 5mA, 50mA	100 @ 10mA, 1V	625	250	TO-92-3
2N3906TF	onsemi	Active	200	40	400 @ 5mA, 50mA	100 @ 10mA, 1V	625	250	TO-92-3
2N3906TFR	onsemi	Active	200	40	400 @ 5mA, 50mA	100 @ 10mA, 1V	625	250	TO-92-3
2N3906-AP	Micro Commercial Co	Obsolete	200	40	400 @ 5mA, 50mA	100 @ 10mA, 1V	600	250	TO-92-3
2N4403-AP	Micro Commercial Co	Obsolete	200	40	750 @ 50mA, 500mA	100 @ 150mA, 2V	600	200	TO-92-3

Engineering Selection Recommendations

Direct Substitutes (Fully Compatible):

The following parts are direct substitutes for the 2N3906RLRAG and meet all electrical and mechanical specifications:

2N3906TA (Fairchild Semiconductor, Active): Identical electrical parameters. Active product status ensures ongoing availability. Suitable for immediate replacement.
2N3906TAR (onsemi, Active): Identical electrical parameters. Cut tape packaging. Active product status. Recommended for new designs and production.
2N3906TF (onsemi, Active): Identical electrical parameters. Cut tape packaging. Active product status. Recommended for new designs and production.
2N3906TFR (onsemi, Active): Identical electrical parameters. Cut tape packaging. Active product status. Recommended for new designs and production.

Acceptable Substitutes (Minor Parameter Variations):

2N3906-AP (Micro Commercial Co, Obsolete): Meets all critical electrical parameters. Power rating is 600 mW versus 625 mW on the main part. Obsolete status limits future availability. Acceptable for applications where the 25 mW power difference does not impact thermal design.

Similar Parts (Requires Evaluation):

2N4403-AP (Micro Commercial Co, Obsolete): Shares the same 40 V breakdown voltage and TO-92 package. Differs in saturation voltage (750 mV @ 50 mA, 500 mA versus 400 mV @ 5 mA, 50 mA), current gain test conditions (100 @ 150 mA, 2 V versus 100 @ 10 mA, 1 V), and transition frequency (200 MHz versus 250 MHz). This part is classified as similar rather than direct substitute due to these parameter differences. Circuit-level compatibility analysis is required before substitution.

Compliance and Certification:

All active substitute parts (2N3906TA, 2N3906TAR, 2N3906TF, 2N3906TFR) carry ROHS3 compliance and REACH unaffected status, supporting modern supply chain and environmental requirements.

Frequently Asked Questions (FAQ)

Q: Can 2N3906TAR, 2N3906TF, and 2N3906TFR be used interchangeably with 2N3906RLRAG?

A: Yes. These three parts are direct substitutes. All three meet identical electrical specifications for collector current, breakdown voltage, saturation voltage, current gain, power dissipation, and transition frequency. The primary difference is packaging designation (Cut Tape versus Bulk) and supplier. All three are active products from onsemi, ensuring long-term availability.

Q: What is the difference between 2N3906TA and 2N3906TAR?

A: Both parts meet identical electrical specifications. 2N3906TA is manufactured by Fairchild Semiconductor and supplied in bulk packaging. 2N3906TAR is manufactured by onsemi and supplied in cut tape packaging. Selection depends on procurement requirements and supplier preference.

Q: Why is 2N4403-AP listed as a similar part rather than a direct substitute?

A: The 2N4403-AP differs in three key parameters: saturation voltage (750 mV @ 50 mA, 500 mA versus 400 mV @ 5 mA, 50 mA), current gain test conditions (100 @ 150 mA, 2 V versus 100 @ 10 mA, 1 V), and transition frequency (200 MHz versus 250 MHz). These differences affect circuit performance in switching and amplification applications. Direct substitution without circuit analysis is not recommended.

Q: Is the 25 mW power difference between 2N3906RLRAG (625 mW) and 2N3906-AP (600 mW) significant?

A: The 25 mW difference represents approximately 4% of the rated power. For most general-purpose applications, this difference is not significant. However, in thermally constrained designs or high-power applications operating near maximum ratings, this difference should be evaluated against thermal design margins.

Q: Are all substitute parts available in the same TO-92 package?

A: Yes. All direct substitute parts (2N3906TA, 2N3906TAR, 2N3906TF, 2N3906TFR) and the similar part (2N4403-AP) are packaged in TO-92-3 or TO-226-3 configurations, which are mechanically and electrically compatible with the original 2N3906RLRAG TO-92-3 package.

Q: What is the product status significance for component selection?

A: Active products (2N3906TA, 2N3906TAR, 2N3906TF, 2N3906TFR) are currently manufactured and supported by their respective suppliers, ensuring long-term availability for production and repair. Obsolete products (2N3906RLRAG, 2N3906-AP, 2N4403-AP) are no longer manufactured and may have limited stock availability. For new designs, active products are preferred.

Q: Can 2N3906-AP be used as a direct replacement for 2N3906RLRAG in existing designs?

A: Yes, with the caveat that the 25 mW lower power rating should be verified against the application's thermal requirements. All other electrical parameters are identical. However, due to obsolete status, 2N3906-AP is not recommended for new production. Active alternatives (2N3906TAR, 2N3906TF, 2N3906TFR) are preferred.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message