BC337A_J35Z Equivalent & Substitute Parts

Part Overview

The BC337A_J35Z is an NPN bipolar junction transistor manufactured by onsemi, rated for 45 V collector-emitter breakdown voltage and 800 mA maximum collector current. This device is packaged in a TO-92-3 through-hole configuration and is classified as obsolete. The transition frequency is 100 MHz with a maximum power dissipation of 625 mW. Due to its obsolete status, equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the BC337A_J35Z is determined by strict equivalence across the following critical parameters:

Transistor Type: NPN configuration required
Voltage Rating: 45 V collector-emitter breakdown voltage
Current Rating: 800 mA maximum collector current
Power Dissipation: 625 mW maximum
Frequency Response: 100 MHz transition frequency (minimum)
DC Current Gain: 100 minimum at specified conditions
Saturation Characteristics: 700 mV maximum at specified bias conditions
Package: TO-92-3 through-hole configuration
Mounting: Through-hole assembly compatibility

Substitute parts are classified into two categories:

Direct Manufacturer Substitutes: Parts that match all electrical parameters and package specifications with active product status or improved availability.

Parametric Equivalents: Parts that meet or exceed all critical electrical parameters and maintain package compatibility, enabling functional replacement in circuit applications.

Parameter Comparison

Parameter	BC337A_J35Z (Main)	BC33716BU	BC337-25-AP	BC33716TA
Manufacturer	onsemi	Fairchild Semiconductor	Micro Commercial Co	Fairchild Semiconductor
Product Status	Obsolete	Active	Obsolete	Active
Transistor Type	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	45 V	45 V	45 V	45 V
Current - Collector (Ic) (Max)	800 mA	800 mA	800 mA	800 mA
Power - Max	625 mW	625 mW	625 mW	625 mW
Frequency - Transition	100 MHz	100 MHz	210 MHz	100 MHz
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 100mA, 1V	100 @ 100mA, 1V	160 @ 100mA, 1V	100 @ 100mA, 1V
Vce Saturation (Max) @ Ib, Ic	700mV @ 50mA, 500mA	700mV @ 50mA, 500mA	700mV @ 50mA, 500mA	700mV @ 50mA, 500mA
Current - Collector Cutoff (Max)	100 nA	100 nA	200 nA	100 nA
Operating Temperature (Max)	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3
Inventory Status	887 Pcs	73196 Pcs	8300 Pcs	14100 Pcs

Engineering Selection Recommendations

BC33716BU (Fairchild Semiconductor) is the primary recommended substitute. This part maintains identical electrical specifications to the BC337A_J35Z across all critical parameters, including voltage rating, current capacity, power dissipation, transition frequency, and DC current gain. The device carries active product status, ensuring long-term availability and supply chain stability. The part is packaged in TO-92-3 configuration with through-hole mounting compatibility. Inventory availability is substantial at 73,196 pieces.

BC33716TA (Fairchild Semiconductor) is a secondary equivalent option. This part is also manufactured by Fairchild Semiconductor with active product status. All electrical parameters match the BC337A_J35Z specification exactly, including the 100 MHz transition frequency and 100 minimum DC current gain. The TO-92-3 package and through-hole mounting provide direct mechanical compatibility. Inventory availability is 14,100 pieces.

BC337-25-AP (Micro Commercial Co) is a parametric equivalent with enhanced performance characteristics. This part exceeds the BC337A_J35Z specification in transition frequency (210 MHz versus 100 MHz) and DC current gain (160 minimum versus 100 minimum). The collector cutoff current is higher at 200 nA compared to 100 nA. All other parameters remain equivalent. This part is suitable for applications where higher frequency response or gain margin is beneficial. Product status is obsolete, but inventory availability is 8,300 pieces.

Selection should prioritize BC33716BU for new designs and production applications due to active status and superior availability. BC33716TA serves as an alternative with equivalent specifications. BC337-25-AP is suitable when enhanced frequency response is advantageous, despite obsolete status.

Frequently Asked Questions (FAQ)

Q: Can BC33716BU be used as a direct replacement for BC337A_J35Z?

A: Yes. BC33716BU meets all electrical specifications of the BC337A_J35Z, including voltage rating (45 V), current capacity (800 mA), power dissipation (625 mW), transition frequency (100 MHz), and DC current gain (100 minimum). The TO-92-3 package and through-hole mounting are identical. The part carries active product status, providing supply continuity.

Q: What is the difference between BC33716BU and BC33716TA?

A: Both parts are manufactured by Fairchild Semiconductor and share identical electrical specifications and package configuration. The primary difference is product status and inventory availability. BC33716BU is available in bulk packaging with 73,196 pieces in stock. BC33716TA is available with 14,100 pieces in stock. Both are suitable for direct substitution.

Q: Why does BC337-25-AP have different specifications?

A: BC337-25-AP is a parametric equivalent that exceeds the BC337A_J35Z specification. The transition frequency is 210 MHz (versus 100 MHz), and the DC current gain minimum is 160 (versus 100). The collector cutoff current is 200 nA (versus 100 nA). These differences represent enhanced performance characteristics. All other parameters, including voltage, current, and power ratings, remain equivalent. This part is suitable for applications where higher frequency response or gain margin is required.

Q: Are all substitute parts compatible with TO-92-3 through-hole PCB layouts?

A: Yes. All substitute parts listed are packaged in TO-92-3 configuration with through-hole mounting. They are mechanically and electrically compatible with existing PCB designs and assembly processes for the BC337A_J35Z.

Q: What is the significance of product status (Active vs. Obsolete)?

A: Active product status indicates ongoing manufacturing and long-term availability from the manufacturer. Obsolete status indicates the part is no longer in production. For new designs and long-term production, active-status parts (BC33716BU and BC33716TA) are preferred. Obsolete parts (BC337A_J35Z and BC337-25-AP) may have limited future availability.

Q: Can BC337-25-AP be used in applications designed for BC337A_J35Z?

A: Yes. BC337-25-AP meets or exceeds all critical electrical parameters of the BC337A_J35Z. The enhanced transition frequency (210 MHz) and higher DC current gain (160) provide performance margin. The part is suitable for direct substitution in existing circuit designs.

Q: What compliance certifications apply to these substitute parts?

A: All listed parts carry ECCN classification EAR99 and HTSUS code 8541.21.0075. BC337-25-AP is RoHS3 compliant. All parts have Moisture Sensitivity Level (MSL) 1 (Unlimited) and REACH Unaffected status.

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