BC337ABU Equivalent & Substitute Parts

Part Overview

The BC337ABU is an NPN bipolar junction transistor manufactured by onsemi, designed for small-signal switching and amplification applications. This device operates at a maximum collector current of 800 mA with a collector-emitter breakdown voltage of 45 V and a maximum power dissipation of 625 mW. The BC337ABU is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. Substitute parts must maintain identical electrical characteristics and mechanical compatibility to ensure direct replacement without circuit redesign.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) (Max)	800	mA
Voltage - Collector Emitter Breakdown (Max)	45	V
Vce Saturation (Max) @ Ib, Ic	700 mV @ 50 mA, 500 mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 100 mA, 1 V	—
Power - Max	625	mW
Frequency - Transition	100	MHz
Operating Temperature (TJ)	150	°C
Mounting Type	Through Hole	—
Package / Case	TO-92-3 (TO-226AA)	—

Substitute Part Grouping Explanation

Substitute parts for the BC337ABU are identified based on strict parametric equivalence across all electrical and mechanical specifications. The substitution criteria are:

Transistor Type: NPN configuration
Current Rating: Maximum collector current of 800 mA
Voltage Rating: Collector-emitter breakdown voltage of 45 V
Saturation Characteristics: Vce saturation of 700 mV @ 50 mA, 500 mA
Leakage Current: Collector cutoff current of 100 nA maximum
Current Gain: DC current gain (hFE) minimum of 100 @ 100 mA, 1 V
Power Dissipation: Maximum power rating of 625 mW
Frequency Response: Transition frequency of 100 MHz
Temperature Rating: Operating junction temperature of 150°C
Package: TO-92-3 through-hole configuration

Substitute parts must match all parameters listed above to ensure functional and mechanical compatibility without circuit modification.

Parameter Comparison

Parameter	BC337ABU (onsemi)	BC33716BU (Fairchild Semiconductor)
Transistor Type	NPN	NPN
Current - Collector (Ic) (Max)	800 mA	800 mA
Voltage - Collector Emitter Breakdown (Max)	45 V	45 V
Vce Saturation (Max) @ Ib, Ic	700 mV @ 50 mA, 500 mA	700 mV @ 50 mA, 500 mA
Current - Collector Cutoff (Max)	100 nA	100 nA
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 100 mA, 1 V	100 @ 100 mA, 1 V
Power - Max	625 mW	625 mW
Frequency - Transition	100 MHz	100 MHz
Operating Temperature (TJ)	150°C	150°C
Mounting Type	Through Hole	Through Hole
Package / Case	TO-92-3 (TO-226AA)	TO-92-3 (TO-226AA)
Product Status	Obsolete	Active

Engineering Selection Recommendations

The BC33716BU manufactured by Fairchild Semiconductor is a parametric equivalent substitute for the obsolete BC337ABU. This substitute part maintains all electrical specifications and mechanical compatibility required for direct replacement.

Selection Basis:

Product Status: The BC33716BU is classified as active, ensuring ongoing availability and manufacturing support, whereas the BC337ABU is obsolete.
Electrical Equivalence: All electrical parameters, including current ratings, voltage ratings, saturation characteristics, current gain, power dissipation, and frequency response, are identical between the two parts.
Mechanical Compatibility: Both parts utilize the TO-92-3 through-hole package, enabling direct physical substitution without PCB modification.
Compliance: Both parts carry identical ECCN (EAR99) and HTSUS (8541.21.0075) classifications, confirming regulatory equivalence.

The BC33716BU is suitable for applications currently using the BC337ABU where component obsolescence requires replacement with an active equivalent.

Frequently Asked Questions (FAQ)

Q: Can the BC33716BU be used as a direct replacement for the BC337ABU?

A: Yes. The BC33716BU is a parametric equivalent with identical electrical specifications and TO-92-3 package configuration. Direct substitution is possible without circuit modification.

Q: What is the primary reason for seeking a substitute for the BC337ABU?

A: The BC337ABU is classified as obsolete. The BC33716BU is an active product from Fairchild Semiconductor with identical specifications, ensuring long-term availability and manufacturing continuity.

Q: Are there any differences in the electrical performance between these parts?

A: No. Both parts share identical maximum collector current (800 mA), collector-emitter breakdown voltage (45 V), saturation characteristics, current gain, power dissipation (625 mW), transition frequency (100 MHz), and operating temperature rating (150°C).

Q: Do these parts require different PCB layouts or mounting procedures?

A: No. Both parts use the TO-92-3 through-hole package. PCB layouts and mounting procedures remain unchanged.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by matching transistor type (NPN), maximum collector current (800 mA), collector-emitter breakdown voltage (45 V), saturation voltage characteristics, leakage current (100 nA), DC current gain (100 @ 100 mA, 1 V), power dissipation (625 mW), transition frequency (100 MHz), operating temperature (150°C), and package type (TO-92-3).

Q: Are there inventory considerations when selecting between these parts?

A: The BC337ABU has 864 pieces in stock (obsolete status). The BC33716BU has 73,196 pieces in stock with active product status, providing superior long-term availability.

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