BC337TFR Equivalent & Substitute Parts

Part Overview

The BC337TFR is an NPN bipolar junction transistor manufactured by onsemi, rated for 45V collector-emitter breakdown voltage and 800mA maximum collector current. This device is packaged in a TO-92-3 through-hole configuration and is currently classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the BC337TFR are identified based on electrical and mechanical parameter compatibility. The primary substitution criteria are:

Transistor Type: NPN configuration
Current Rating: 800 mA maximum collector current
Voltage Rating: 45 V collector-emitter breakdown voltage
Saturation Characteristics: 700mV @ 50mA, 500mA
Power Dissipation: 625 mW maximum
Package Type: TO-92-3 through-hole configuration
Mounting: Through-hole assembly compatibility

The identified substitute parts meet these core electrical specifications and physical packaging requirements, enabling direct functional replacement in circuit applications designed for the BC337TFR.

Parameter Comparison

Parameter	BC337TFR (onsemi)	BC33716TA (Fairchild)	BC337-25-AP (MCC)
Transistor Type	NPN	NPN	NPN
Current - Collector (Ic) (Max)	800 mA	800 mA	800 mA
Voltage - Collector Emitter Breakdown (Max)	45 V	45 V	45 V
Vce Saturation (Max) @ Ib, Ic	700mV @ 50mA, 500mA	700mV @ 50mA, 500mA	700mV @ 50mA, 500mA
Current - Collector Cutoff (Max)	100nA	100nA	200nA
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 100mA, 1V	100 @ 100mA, 1V	160 @ 100mA, 1V
Power - Max	625 mW	625 mW	625 mW
Frequency - Transition	100MHz	100MHz	210MHz
Operating Temperature	150°C (TJ)	150°C (TJ)	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3
Product Status	Obsolete	Active	Obsolete

Engineering Selection Recommendations

BC33716TA (Fairchild Semiconductor) is the primary substitute for BC337TFR applications. This part maintains active product status, ensuring ongoing availability and manufacturing support. All critical electrical parameters are identical to the BC337TFR, including collector current, voltage rating, saturation characteristics, and power dissipation. The TO-92-3 package provides direct mechanical compatibility with existing PCB layouts and through-hole assembly processes.

BC337-25-AP (Micro Commercial Co) is an alternative substitute that meets the core electrical requirements of the BC337TFR. This part exhibits enhanced performance characteristics, including higher DC current gain (160 vs. 100 @ 100mA, 1V), increased transition frequency (210MHz vs. 100MHz), and extended operating temperature range (-55°C to 150°C). However, BC337-25-AP is classified as obsolete. The slightly elevated collector cutoff current (200nA vs. 100nA) remains within acceptable operational margins for most applications. Cut tape packaging requires consideration for assembly compatibility.

Selection between these substitutes depends on component availability requirements and performance margin specifications. Active product status of BC33716TA provides supply chain advantages for new production. BC337-25-AP offers enhanced frequency response for applications requiring higher switching speeds.

Frequently Asked Questions (FAQ)

Q: Can BC33716TA directly replace BC337TFR in existing designs?

A: Yes. BC33716TA maintains identical electrical specifications for collector current (800mA), voltage rating (45V), saturation characteristics, and power dissipation (625mW). The TO-92-3 package provides direct physical compatibility with through-hole PCB layouts designed for BC337TFR.

Q: What is the primary advantage of BC33716TA over BC337TFR?

A: BC33716TA holds active product status, ensuring continued manufacturing and supply availability. BC337TFR is obsolete, making long-term sourcing problematic.

Q: Are there performance differences between BC337TFR and BC337-25-AP?

A: BC337-25-AP exhibits higher DC current gain (160 vs. 100 @ 100mA, 1V) and transition frequency (210MHz vs. 100MHz). Collector cutoff current is slightly higher (200nA vs. 100nA). These differences are acceptable for most applications but should be evaluated for circuits with specific gain or frequency requirements.

Q: Is the BC337-25-AP packaging compatible with BC337TFR designs?

A: BC337-25-AP uses TO-92-3 package in cut tape format. Physical dimensions and pin configuration are compatible with through-hole assembly. Verify cut tape handling compatibility with existing assembly equipment.

Q: What is the operating temperature range difference between substitutes?

A: BC337TFR and BC33716TA specify 150°C maximum junction temperature. BC337-25-AP extends the range to -55°C to 150°C, providing wider thermal operating margins for applications in extreme temperature environments.

Q: Can BC337-25-AP be used in applications where BC337TFR was originally specified?

A: Yes. BC337-25-AP meets or exceeds all core electrical specifications of BC337TFR. Enhanced performance characteristics (higher gain, frequency) do not create incompatibility. Circuit designs based on BC337TFR minimum specifications operate within BC337-25-AP operating parameters.

Q: Which substitute should be selected for new production designs?

A: BC33716TA is recommended for new production due to active product status and guaranteed long-term availability. BC337-25-AP is suitable when enhanced performance characteristics provide design advantages and component availability is confirmed.

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