BC337BU Equivalent & Substitute Parts

Part Overview

The BC337BU is an NPN bipolar junction transistor manufactured by onsemi, designed for small-signal switching and amplification applications. This device features a maximum collector current of 800 mA, collector-emitter breakdown voltage of 45 V, and a transition frequency of 100 MHz. The BC337BU is packaged in a TO-92-3 through-hole configuration with a maximum power dissipation of 625 mW.

The BC337BU carries an obsolete product status. Identification of equivalent substitute components is necessary to maintain design continuity and ensure component availability for production, repair, and maintenance applications.

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

Substitution of the BC337BU is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must satisfy the following criteria:

Electrical Parameters (Required Match):

Transistor Type: NPN
Maximum Collector Current (Ic): 800 mA
Collector-Emitter Breakdown Voltage: 45 V
Vce Saturation: 700 mV @ 50 mA, 500 mA
Collector Cutoff Current: 100 nA
DC Current Gain (hFE): 100 @ 100 mA, 1 V
Maximum Power Dissipation: 625 mW
Transition Frequency: 100 MHz
Maximum Operating Temperature: 150 °C

Mechanical Parameters (Required Match):

Mounting Type: Through Hole
Package Configuration: TO-92-3 (TO-226AA)

The BC33716BU from Fairchild Semiconductor meets all specified electrical and mechanical parameters and qualifies as a parametric equivalent substitute.

Parameter Comparison

Parameter	BC337BU (onsemi)	BC33716BU (Fairchild Semiconductor)	Match
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 from Fairchild Semiconductor is a direct parametric equivalent to the BC337BU. Both devices share identical electrical specifications and mechanical packaging, enabling pin-for-pin substitution in circuit applications.

The BC33716BU carries an active product status, ensuring ongoing availability and supply chain continuity. The BC337BU is classified as obsolete, making the BC33716BU the appropriate selection for new designs, production builds, and component replenishment.

Both parts comply with ECCN EAR99 and HTSUS 8541.21.0075 classifications. The BC33716BU maintains REACH compliance status consistent with the original BC337BU specification.

Frequently Asked Questions (FAQ)

Q: Can the BC33716BU be used as a direct replacement for the BC337BU?

A: Yes. The BC33716BU is a parametric equivalent with identical electrical ratings and mechanical packaging. Direct pin-for-pin substitution is supported without circuit modification.

Q: What is the primary reason for substitution?

A: The BC337BU is classified as obsolete. The BC33716BU provides equivalent functionality with active product status and assured supply availability.

Q: Are the package configurations identical?

A: Yes. Both the BC337BU and BC33716BU use the TO-92-3 (TO-226AA) through-hole package configuration. No PCB layout or mechanical assembly changes are required.

Q: Do the electrical specifications match exactly?

A: Yes. All electrical parameters are identical, including maximum collector current (800 mA), collector-emitter breakdown voltage (45 V), DC current gain (100 @ 100 mA, 1 V), maximum power dissipation (625 mW), and transition frequency (100 MHz).

Q: Are there any compliance or certification differences?

A: Both parts share identical ECCN and HTSUS classifications. The BC33716BU maintains REACH compliance status equivalent to the BC337BU.

Q: What is the inventory status of the substitute part?

A: The BC33716BU has 73,196 pieces in stock as new original inventory, ensuring availability for immediate procurement.

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