BC337_J35Z Equivalent & Substitute Parts

Part Overview

The BC337_J35Z is an NPN bipolar junction transistor manufactured by onsemi, designed for general-purpose switching and amplification applications. This device features a maximum collector current of 800 mA, collector-emitter breakdown voltage of 45 V, and maximum power dissipation of 625 mW in a through-hole TO-92-3 package. The BC337_J35Z is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) Max	800	mA
Voltage - Collector Emitter Breakdown (Max)	45	V
Vce Saturation (Max)	700 mV @ 50 mA, 500 mA	—
Current - Collector Cutoff (Max)	100	nA
DC Current Gain (hFE) Min	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)	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the BC337_J35Z is determined by electrical and mechanical compatibility across the following critical parameters:

Primary Substitution Criteria:

Transistor Type: NPN configuration
Current - Collector (Ic) Max: 800 mA minimum
Voltage - Collector Emitter Breakdown: 45 V minimum
Power - Max: 625 mW minimum
Mounting Type: Through Hole
Package / Case: TO-92-3 or TO-92 compatible form factor

Substitution Categories:

Direct Equivalents maintain identical electrical specifications and package configuration. These parts are pin-compatible and functionally interchangeable without circuit modification.

Parametric Equivalents meet or exceed all critical electrical parameters while maintaining mechanical compatibility. These parts may have enhanced performance characteristics (higher frequency response, improved gain, extended temperature range) but remain functionally suitable for the original application.

Similar Alternatives provide comparable performance within the same device category but may have minor parameter variations or different package designations. These require verification of specific application requirements.

Parameter Comparison

Parameter	BC337_J35Z (Main)	BC33716BU	BC337-25-AP	ZTX450	BC33716TA
Manufacturer	onsemi	Fairchild Semiconductor	Micro Commercial Co	Diodes Incorporated	Fairchild Semiconductor
Product Status	Obsolete	Active	Obsolete	Active	Active
Transistor Type	NPN	NPN	NPN	NPN	NPN
Current - Collector (Ic) Max	800 mA	800 mA	800 mA	1 A	800 mA
Voltage - Collector Emitter Breakdown (Max)	45 V	45 V	45 V	45 V	45 V
Vce Saturation (Max)	700 mV @ 50 mA, 500 mA	700 mV @ 50 mA, 500 mA	700 mV @ 50 mA, 500 mA	250 mV @ 15 mA, 150 mA	700 mV @ 50 mA, 500 mA
Current - Collector Cutoff (Max)	100 nA	100 nA	200 nA	100 nA	100 nA
DC Current Gain (hFE) Min	100 @ 100 mA, 1 V	100 @ 100 mA, 1 V	160 @ 100 mA, 1 V	100 @ 150 mA, 10 V	100 @ 100 mA, 1 V
Power - Max	625 mW	625 mW	625 mW	1 W	625 mW
Frequency - Transition	100 MHz	100 MHz	210 MHz	150 MHz	100 MHz
Operating Temperature (TJ)	150°C	150°C	-55°C ~ 150°C	-55°C ~ 200°C	150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3	TO-92-3	TO-92	E-Line-3 (TO-92 compatible)	TO-92-3
RoHS Status	—	—	ROHS3 Compliant	ROHS3 Compliant	—
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

BC33716BU (Direct Equivalent - Recommended Primary Substitute)

The BC33716BU manufactured by Fairchild Semiconductor is a direct electrical and mechanical equivalent to the BC337_J35Z. This part maintains identical specifications across all critical parameters: 800 mA collector current, 45 V breakdown voltage, 625 mW power dissipation, 100 MHz transition frequency, and TO-92-3 package configuration. The BC33716BU holds Active product status with 73,196 units in stock, providing superior procurement availability compared to the obsolete BC337_J35Z. Both parts share identical REACH and ECCN compliance classifications.

BC33716TA (Parametric Equivalent - Secondary Substitute)

The BC33716TA from Fairchild Semiconductor provides parametric equivalence with identical electrical specifications and TO-92-3 package compatibility. This part is currently Active with 14,100 units available. The BC33716TA matches all critical performance parameters of the BC337_J35Z and serves as a suitable alternative when BC33716BU availability is constrained.

BC337-25-AP (Parametric Equivalent - Extended Temperature Range)

The BC337-25-AP manufactured by Micro Commercial Co meets all electrical requirements of the BC337_J35Z while offering an extended operating temperature range of -55°C to 150°C compared to the standard 150°C maximum. This part features enhanced DC current gain (160 minimum versus 100 minimum) and higher transition frequency (210 MHz versus 100 MHz). The BC337-25-AP is classified as Obsolete but maintains 8,300 units in stock. RoHS3 compliance is documented for this part.

ZTX450 (Similar Alternative - Enhanced Performance)

The ZTX450 from Diodes Incorporated represents a similar alternative with enhanced electrical performance characteristics. This part exceeds the BC337_J35Z specifications in collector current (1 A versus 800 mA), power dissipation (1 W versus 625 mW), transition frequency (150 MHz versus 100 MHz), and operating temperature range (-55°C to 200°C). The ZTX450 uses an E-Line-3 package designation (TO-92 compatible) and maintains Active product status with 1,600 units in stock. RoHS3 compliance is confirmed.

Frequently Asked Questions (FAQ)

Q: Can BC33716BU be used as a direct replacement for BC337_J35Z without circuit modification?

A: Yes. The BC33716BU is a direct equivalent with identical electrical specifications and TO-92-3 package configuration. No circuit modification is required for substitution.

Q: What is the primary advantage of selecting BC33716BU over BC337_J35Z?

A: The BC33716BU maintains Active product status with significantly higher inventory availability (73,196 units versus 960 units). This ensures long-term procurement continuity and supply chain reliability.

Q: Are BC337-25-AP and ZTX450 suitable for applications requiring the original BC337_J35Z specifications?

A: Both parts meet or exceed the electrical requirements of the BC337_J35Z. BC337-25-AP provides identical core specifications with extended temperature range. ZTX450 offers enhanced performance (higher current, power, and frequency) but uses a different package designation (E-Line-3 versus TO-92-3). Application-specific requirements determine suitability.

Q: What is the difference between TO-92-3 and E-Line-3 packages?

A: Both are through-hole packages with TO-92 compatible pin configurations. The E-Line-3 designation indicates a specific package variant. Physical compatibility should be verified for PCB footprint requirements.

Q: Do all substitute parts comply with REACH and RoHS regulations?

A: All substitute parts maintain REACH Unaffected status. BC337-25-AP and ZTX450 are explicitly RoHS3 Compliant. Compliance documentation for BC33716BU and BC33716TA should be obtained from the respective manufacturers.

Q: Which substitute part offers the best thermal performance?

A: ZTX450 provides the highest power dissipation rating (1 W versus 625 mW) and extended operating temperature range (-55°C to 200°C). This part is suitable for applications with elevated thermal requirements.

Q: Can BC33716TA be used interchangeably with BC33716BU?

A: Yes. Both parts are manufactured by Fairchild Semiconductor with identical electrical specifications and TO-92-3 package configuration. Selection between these parts is determined by packaging format (Bulk versus Tape) and inventory availability.

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