SA33CA-TP Equivalent & Substitute Parts

Part Overview

The SA33CA-TP is a transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection applications. This through-hole component operates with a 33V reverse standoff voltage and provides 53.3V clamping at peak pulse current. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when sourcing from different manufacturers is preferred for supply chain optimization.

Substiute Parts

SA33CA-TP

Micro Commercial CoIn Stock: 993SA33CA-TP Datasheet

Current PartRFQ

SA33CA

Fairchild SemiconductorIn Stock: 13784SA33CA Datasheet

DirectRFQ

P6KE39CA

Fairchild SemiconductorIn Stock: 27147P6KE39CA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TVS diodes is determined by electrical parameter equivalence within specified tolerances. The critical parameters that define substitutability are:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 33V
• Voltage - Breakdown (Min): 36.7V
• Voltage - Clamping (Max) @ Ipp: 53.3V
• Current - Peak Pulse (10/1000µs): 9.6A
• Power - Peak Pulse: 500W

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: DO-204AC, DO-15, Axial

The substitute parts listed maintain identical electrical performance specifications and compatible mechanical packaging, ensuring functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

SA33CA (Direct Substitute): This part maintains complete electrical and mechanical equivalence to the SA33CA-TP. Both components share identical voltage ratings, current specifications, and thermal operating ranges. The primary difference is packaging format: SA33CA is supplied in bulk packaging while SA33CA-TP is supplied in tape and reel format. Note that SA33CA carries an obsolete product status, which may impact long-term availability. Both parts maintain ROHS3 compliance and EAR99 export classification.

P6KE39CA (Similar Substitute): This part is listed as a similar substitute but lacks complete electrical parameter specification in the provided data. Selection of this component requires verification of its detailed electrical characteristics against the SA33CA-TP specifications. P6KE39CA maintains active product status and is available in bulk packaging.

For applications requiring immediate component availability with guaranteed long-term supply, SA33CA-TP in its active status is the primary choice. For cost optimization or packaging format flexibility, SA33CA provides electrical equivalence despite its obsolete designation. P6KE39CA should be evaluated only when complete electrical parameter data is available and confirmed to match the required specifications.

Frequently Asked Questions (FAQ)

Q: Can SA33CA be used as a direct replacement for SA33CA-TP?

A: Yes. SA33CA provides complete electrical equivalence with identical voltage ratings (33V standoff, 36.7V breakdown minimum, 53.3V clamping maximum), current specifications (9.6A peak pulse), and power dissipation (500W peak pulse). Both components use DO-204AC/DO-15 axial through-hole packaging. The difference is packaging format: SA33CA-TP uses tape and reel format while SA33CA uses bulk packaging. However, SA33CA is obsolete, which may affect future availability.

Q: What is the difference between tape and reel (TR) and bulk packaging?

A: Tape and reel packaging is used for automated assembly processes, where components are wound on continuous tape for pick-and-place machine compatibility. Bulk packaging consists of loose components typically supplied in trays or bags. For manual assembly or low-volume applications, bulk packaging is acceptable. For high-volume automated manufacturing, tape and reel format is required.

Q: Is P6KE39CA a suitable replacement?

A: P6KE39CA is listed as a similar substitute but does not have complete electrical parameter data provided. The designation "P6KE39CA" suggests a different voltage class than the SA33CA-TP. Direct substitution cannot be confirmed without verification of its complete electrical specifications against the required 33V standoff, 36.7V breakdown, and 53.3V clamping parameters.

Q: Are all substitute parts RoHS3 compliant?

A: SA33CA-TP and SA33CA are both confirmed ROHS3 compliant. P6KE39CA compliance status is not specified in the provided data and must be verified independently if RoHS3 compliance is a requirement.

Q: What is the impact of SA33CA being obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production. While existing inventory may be available from distributors, long-term supply cannot be guaranteed. For new designs or applications requiring extended component availability, SA33CA-TP (active status) is the preferred choice.