SA14A-B Equivalent & Substitute Parts

Part Overview

The SA14A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This through-hole component operates with a 14V reverse standoff voltage and provides 23.2V maximum clamping voltage at peak pulse current. The part is currently active in production status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are necessary when the original SA14A-B becomes unavailable due to supply constraints, manufacturing discontinuation, or when alternative packaging formats are required for specific assembly processes.

Substiute Parts

SA14A-B

Littelfuse Inc.In Stock: 1145SA14A-B Datasheet

Current PartRFQ

SA14A

Fairchild SemiconductorIn Stock: 300422SA14A Datasheet

MFR RecommendedRFQ

SA14A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 8285SA14A-E3/54 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SA14A-B is determined by strict equivalence across the following critical parameters:

Voltage specifications: Reverse standoff voltage of 14V, breakdown minimum of 15.6V, and clamping maximum of 23.2V must be maintained.

Current rating: Peak pulse current of 22A (or within acceptable tolerance) at 10/1000µs pulse duration.

Power dissipation: Peak pulse power rating of 500W.

Package compatibility: DO-204AC (DO-15) axial through-hole configuration.

Operating temperature: Full range of -55°C to 175°C junction temperature.

Compliance: RoHS3 compliance required for regulatory alignment.

Two substitute parts meet these criteria with documented electrical and mechanical equivalence to the SA14A-B.

Parameter Comparison

Engineering Selection Recommendations

SA14A (Fairchild Semiconductor): This part provides complete electrical and mechanical equivalence to the SA14A-B with identical voltage and power specifications. However, the part carries obsolete status, indicating discontinued production. Selection of this substitute should be limited to applications where existing inventory is available and long-term supply is not a requirement.

SA14A-E3/54 (Vishay General Semiconductor): This part maintains active production status and meets all critical electrical parameters with a peak pulse current specification of 21.6A, which is within acceptable tolerance of the 22A requirement. The part is supplied in Cut Tape (CT) packaging format rather than bulk, which may require process adjustment for automated assembly environments. Full RoHS3 compliance and unlimited moisture sensitivity rating align with the original part specifications. This substitute is suitable for applications requiring long-term availability and continuous supply.

Frequently Asked Questions (FAQ)

Q: Can SA14A-E3/54 be used as a direct replacement for SA14A-B in all applications?

A: Yes, provided that the assembly process accommodates Cut Tape (CT) packaging. The electrical specifications are equivalent within acceptable engineering tolerances. The 21.6A peak pulse current specification is within the functional range of the 22A requirement.

Q: Why is the SA14A (Fairchild) listed as obsolete?

A: Obsolete status indicates that the manufacturer has discontinued production. While existing inventory may be available through distributors, this part should not be selected for new designs or applications requiring long-term component availability.

Q: Are there any compliance differences between the three parts?

A: All three parts maintain ROHS3 compliance and carry identical regulatory certifications (ECCN: EAR99, HTSUS: 8541.10.0080). No compliance barriers exist for substitution.

Q: Does packaging format affect electrical performance?

A: No. Bulk and Cut Tape (CT) packaging formats contain identical components. The difference is in the delivery and handling format for assembly processes. Bulk packaging is typically used for manual or loose component handling, while Cut Tape is optimized for automated pick-and-place equipment.

Q: What is the significance of the 10/1000µs pulse duration specification?

A: This specification defines the test conditions under which peak pulse current and clamping voltage are measured. All substitute parts are tested under identical pulse duration conditions, ensuring direct comparability of electrical performance.