SA12CA-TP Equivalent & Substitute Parts

Part Overview

The SA12CA-TP is a Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in through-hole applications. This component features a 12V reverse standoff voltage with a 19.9V maximum clamping voltage and 25.6A peak pulse current capability in a DO-15 package. The part is currently in active production status with 1361 units in stock. Substitute parts are necessary when the primary manufacturer part becomes unavailable, when alternative packaging formats are required, or when sourcing from different manufacturers is preferred for supply chain optimization.

Substiute Parts

SA12CA-TP

Micro Commercial CoIn Stock: 1447SA12CA-TP Datasheet

Current PartRFQ

SA12CA

Fairchild SemiconductorIn Stock: 6471SA12CA Datasheet

DirectRFQ

SA12CA-B

Littelfuse Inc.In Stock: 2160SA12CA-B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SA12CA-TP is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

• Voltage - Reverse Standoff (Typ): 12V
• Voltage - Breakdown (Min): 13.3V
• Voltage - Clamping (Max) @ Ipp: 19.9V
• Current - Peak Pulse (10/1000µs): minimum 25.1A
• Power - Peak Pulse: 500W
• Mounting Type: Through Hole
• Package / Case: DO-204AC or DO-15 (equivalent axial packages)
• Type: Zener
• Bidirectional Channels: 1

The substitute parts SA12CA and SA12CA-B meet these electrical specifications within the defined tolerances. Both maintain the same voltage ratings, support equivalent or superior current handling, and are available in compatible through-hole packages. Package format variations (DO-15 vs. DO-204AC) are mechanically interchangeable for through-hole PCB applications.

Parameter Comparison

Engineering Selection Recommendations

SA12CA-TP (Primary Part): Recommended for new designs and applications requiring active product status with guaranteed long-term availability. This part is currently in production with 1361 units in stock and maintains full compliance with ROHS3 and REACH standards.

SA12CA (Fairchild Semiconductor): This part meets all electrical specifications but carries an obsolete product status. Selection of this substitute should be limited to legacy system maintenance or repair applications where component continuity is required. Availability may be limited to existing inventory.

SA12CA-B (Littelfuse Inc.): Suitable as a direct substitute for both new designs and existing applications. This part maintains active product status, meets all electrical and thermal specifications, and is available in bulk packaging with 2099 units in stock. The DO-204AC package designation is mechanically equivalent to DO-15 for through-hole PCB mounting.

Selection between SA12CA-TP and SA12CA-B should be based on supply chain requirements, packaging preferences (cut tape vs. bulk), and manufacturer qualification within the end application.

Frequently Asked Questions (FAQ)

Q: Can SA12CA-B replace SA12CA-TP in existing designs? A: Yes. Both parts share identical electrical specifications (12V standoff, 19.9V clamping, 25.6A peak pulse current) and are compatible through-hole packages. The DO-204AC package used in SA12CA-B is mechanically equivalent to the DO-15 package in SA12CA-TP for PCB mounting.

Q: Why is SA12CA listed as obsolete? A: SA12CA is manufactured by Fairchild Semiconductor and carries an obsolete product status, indicating it is no longer in active production. This part should only be selected for legacy system support where component continuity is critical.

Q: What is the difference between DO-15 and DO-204AC packages? A: DO-15 and DO-204AC are equivalent designations for the same axial through-hole package format. Both are mechanically and electrically interchangeable for PCB applications.

Q: Are all three parts RoHS compliant? A: Yes. SA12CA-TP, SA12CA, and SA12CA-B are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the minimum peak pulse current for substitution? A: The SA12CA-TP specifies 25.6A peak pulse current. SA12CA provides 25.1A, which is within acceptable tolerance for this application category. SA12CA-B matches the 25.6A specification exactly.

Q: Can these parts be used interchangeably in high-temperature applications? A: Yes. Both SA12CA-TP and SA12CA-B support the full operating temperature range of -55°C to 175°C. Operating temperature specifications for SA12CA are not provided in available documentation.