BC212LB_D74Z Equivalent & Substitute Parts

Part Overview

The BC212LB_D74Z is a PNP bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 100 mA, collector-emitter breakdown voltage of 50 V, and maximum power dissipation of 350 mW in a Through Hole TO-92-3 package. The BC212LB_D74Z is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and production continuity.

Key Parameters

Parameter	BC212LB_D74Z
Transistor Type	PNP
Current - Collector (Ic) (Max)	100 mA
Voltage - Collector Emitter Breakdown (Max)	50 V
Vce Saturation (Max) @ Ib, Ic	600 mV @ 5 mA, 100 mA
Current - Collector Cutoff (Max)	15 nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce	60 @ 2 mA, 5 V
Power - Max	350 mW
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA) Formed Leads
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the BC212LB_D74Z is determined by compatibility across the following critical electrical and mechanical parameters:

Transistor Type: Both the main part and substitute must be PNP configuration to maintain circuit polarity and biasing requirements.

Package and Mounting: The Through Hole TO-92-3 package is a mandatory requirement for mechanical and thermal compatibility with existing PCB layouts and assembly processes.

Voltage Rating: The substitute must support the maximum collector-emitter breakdown voltage required by the application. A substitute with equal or higher voltage rating is acceptable.

Current Rating: The substitute must support the maximum collector current required by the application. A substitute with equal or higher current rating is acceptable.

Power Dissipation: The substitute must support the maximum power dissipation required by the application. A substitute with equal or higher power rating is acceptable.

Operating Temperature Range: The substitute must cover the full operating temperature range of the original part or the specific range required by the application.

DC Current Gain (hFE): The substitute must provide sufficient current gain to support the intended biasing and switching characteristics.

The 2N3906TFR meets these substitution criteria with enhanced electrical specifications while maintaining package compatibility.

Parameter Comparison

Parameter	BC212LB_D74Z	2N3906TFR	Compatibility Notes
Transistor Type	PNP	PNP	Identical
Current - Collector (Ic) (Max)	100 mA	200 mA	Substitute rated higher; acceptable for applications requiring ≤100 mA
Voltage - Collector Emitter Breakdown (Max)	50 V	40 V	Substitute rated lower; suitable for applications requiring ≤40 V
Vce Saturation (Max) @ Ib, Ic	600 mV @ 5 mA, 100 mA	400 mV @ 5 mA, 50 mA	Substitute exhibits lower saturation voltage at specified test conditions
DC Current Gain (hFE) (Min) @ Ic, Vce	60 @ 2 mA, 5 V	100 @ 10 mA, 1 V	Substitute provides higher current gain; measured at different operating point
Power - Max	350 mW	625 mW	Substitute rated higher; acceptable for applications requiring ≤350 mW
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package / Case	TO-226-3, TO-92-3 (TO-226AA) Formed Leads	TO-226-3, TO-92-3 (TO-226AA) Formed Leads	Identical
Frequency - Transition	Not specified	250 MHz	Substitute provides specified transition frequency

Engineering Selection Recommendations

The 2N3906TFR is a direct substitute for the BC212LB_D74Z in applications where the voltage rating constraint is acceptable. The following factors support this substitution:

Product Status: The 2N3906TFR is classified as Active, ensuring ongoing availability and manufacturing support, whereas the BC212LB_D74Z is Obsolete.

Compliance and Certifications: The 2N3906TFR is RoHS3 Compliant and REACH Unaffected, meeting current regulatory requirements. Both parts share identical ECCN (EAR99) classification.

Electrical Enhancement: The 2N3906TFR provides superior electrical characteristics including higher collector current rating (200 mA vs. 100 mA), higher power dissipation rating (625 mW vs. 350 mW), and higher DC current gain (100 vs. 60), making it suitable for applications with increased performance headroom.

Voltage Consideration: The 2N3906TFR has a maximum collector-emitter breakdown voltage of 40 V compared to 50 V for the BC212LB_D74Z. Substitution is valid only for applications where the circuit operates at or below 40 V.

Package Compatibility: Both parts utilize identical Through Hole TO-92-3 packaging, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the 2N3906TFR replace the BC212LB_D74Z in all applications?

A: The 2N3906TFR is a suitable substitute provided the application operates at collector-emitter voltages of 40 V or below. If the circuit requires the full 50 V rating of the BC212LB_D74Z, alternative substitutes must be evaluated.

Q: What is the primary reason for substituting the BC212LB_D74Z?

A: The BC212LB_D74Z is classified as Obsolete. The 2N3906TFR is an Active product with ongoing manufacturing support, ensuring long-term availability for production and design continuity.

Q: Are there any PCB layout changes required when substituting the 2N3906TFR for the BC212LB_D74Z?

A: No PCB layout changes are required. Both transistors use identical Through Hole TO-92-3 packaging with the same pin configuration and lead spacing.

Q: How do the electrical characteristics compare between these two transistors?

A: The 2N3906TFR provides enhanced specifications across multiple parameters: higher maximum collector current (200 mA vs. 100 mA), higher power dissipation (625 mW vs. 350 mW), higher DC current gain (100 vs. 60), and lower saturation voltage (400 mV vs. 600 mV at specified test conditions). The primary trade-off is a lower maximum collector-emitter breakdown voltage (40 V vs. 50 V).

Q: What compliance certifications apply to the 2N3906TFR?

A: The 2N3906TFR is RoHS3 Compliant and REACH Unaffected. Both parts share the same ECCN classification (EAR99) and HTSUS code family.

Q: Does the 2N3906TFR have a specified transition frequency?

A: Yes, the 2N3906TFR has a transition frequency of 250 MHz, which is not specified for the BC212LB_D74Z. This additional specification may provide benefits in higher-frequency switching applications.

Q: What is the operating temperature range for the 2N3906TFR?

A: The 2N3906TFR operates across the identical temperature range as the BC212LB_D74Z: -55°C to 150°C (junction temperature).

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message