BU406-S Equivalent & Substitute Parts Reference

Part Overview

BU406-S (Bourns Inc.) is a Bipolar Junction Transistor (BJT), NPN type, specified for 140 V collector-emitter breakdown voltage and 7 A maximum collector current, housed in a TO-220-3 through-hole package. The transistor is currently listed as Obsolete. For ongoing production, service, or repair of assemblies utilizing BU406-S, identification of suitable substitute models with matching electrical, mechanical, and compliance characteristics is required to ensure continued compatibility and reliable function.

Substiute Parts

BU406-S

Bourns Inc.In Stock: 700BU406-S Datasheet

Current PartRFQ

BU406G

onsemiIn Stock: 1477BU406G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute selection for BU406-S is determined strictly by the following key parameters:

• Transistor Type (NPN)
• Maximum Collector Current (Ic)
• Maximum Collector-Emitter Breakdown Voltage
• Vce Saturation (Max) at specified Ib, Ic
• Current - Collector Cutoff (Max)
• Power Dissipation (Max)
• Frequency - Transition
• Operating Temperature Range
• Package / Case (TO-220-3)
• Mounting Type (Through Hole)
• RoHS Compliance

A substitute model must match or exceed these specifications to ensure compatibility in electrical and mechanical interfaces.

Parameter Comparison

Engineering Selection Recommendations

BU406-S is classified as Obsolete. Selection of substitute requires equivalent RoHS compliance, identical mounting and package (TO-220-3 through-hole), and matching or superior values for all provided electrical specifications and mechanical format. BU406G (onsemi) is cataloged as Active, with ROHS3 compliance and identical TO-220-3 package. No additional certification differences are present in the provided data for both main and substitute parts.

Frequently Asked Questions (FAQ)

Q: What parameters are strictly used to define suitable substitutes for BU406-S?
A: Only parameters explicitly provided are used; these include transistor type, maximum collector current, breakdown voltage, Vce saturation, current cutoff, power rating, frequency, operating temperature, mounting type, package, and RoHS status.

Q: Can BU406G replace BU406-S in applications requiring mechanical pin compatibility?
A: Both parts share the TO-220-3 package and through-hole mounting type, supporting direct replacement based on provided mechanical parameters.

Q: Are compliance and certification statuses equivalent between BU406-S and its substitute?
A: Both BU406-S and BU406G are ROHS3 compliant. No other compliance differences are provided in the source data.

Q: Are there differences in operating temperature or electrical capabilities important for substitution?
A: All listed parameters equal or exceed those of BU406-S in BU406G; operating temperature range, frequency, and breakdown voltage are compatible as per provided input.

Q: Is it necessary to confirm other characteristics before substituting BU406G for BU406-S?
A: Only parameters explicitly provided are considered; no additional verification is required based on the current substitution criteria.