BDX54-S Equivalent & Substitute Parts Reference

Part Overview

The BDX54-S by Bourns Inc. is a PNP Darlington bipolar junction transistor (BJT) designed for medium-power switching and amplification applications. Key specifications include a collector-emitter voltage of 45 V, a maximum collector current of 8 A, a collector-emitter saturation voltage of 2 V at specified bias, a DC current gain (hFE) minimum of 750, and a TO-220 through-hole package. The part is classified as Obsolete, making it necessary to identify replacement or alternative models that match function and mechanical fit.

Substiute Parts

BDX54-S

Bourns Inc.In Stock: 2386BDX54-S Datasheet

Current PartRFQ

BDX54C

STMicroelectronicsIn Stock: 21611BDX54C Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute part selection is determined strictly by matching the following allowed parameters: transistor type (PNP - Darlington), maximum collector current, minimum collector-emitter voltage rating, collector-emitter saturation voltage, collector cutoff current, DC current gain, mounting type, and mechanical package (TO-220). All substitutes listed below meet or exceed these specifications for direct form and functional replacement.

Parameter Comparison

Engineering Selection Recommendations

The BDX54-S is currently classified as obsolete. The BDX54C from STMicroelectronics is active and meets or exceeds all provided electrical and mechanical parameters, RoHS3 compliance, and moisture sensitivity level requirements. Both utilize the TO-220 package and share identical maximum collector current, PNP Darlington configuration, and achieve at least the minimum DC current gain and collector-emitter breakdown voltage stipulated. The substitute BDX54C maintains environmental and manufacturing compliance.

Frequently Asked Questions (FAQ)

Q1: What parameters are critical when substituting the BDX54-S PNP Darlington transistor?
A1: Key parameters include transistor type, maximum collector current, collector-emitter breakdown voltage, collector-emitter saturation voltage, maximum collector cutoff current, DC current gain, mounting style, and package compatibility.

Q2: Is BDX54C a direct drop-in replacement for BDX54-S?
A2: BDX54C matches all specified electrical, mechanical, and package parameters provided for BDX54-S, allowing for direct substitution based on the supplied data.

Q3: Are there any package or mounting differences between BDX54-S and BDX54C?
A3: Both BDX54-S and BDX54C are provided in the TO-220-3 through-hole package, ensuring mechanical and mounting compatibility.

Q4: Does the substitute part meet current compliance and environmental requirements?
A4: Both BDX54-S and BDX54C are specified as ROHS3 Compliant with an MSL of 1 (unlimited).

Q5: Why is it necessary to use a substitute for BDX54-S?
A5: The BDX54-S is obsolete, and replacement is required when sourcing new or ongoing production quantities.

Q6: Can other substitute part numbers listed under BDX54C be considered?
A6: Substitute part numbers listed for BDX54C include TIP137, TIP127G, and TIP107G, which must be evaluated strictly according to the allowed provided parameters for function and fit.