SA15CA-B Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The SA15CA-B is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole component operates across a wide temperature range of -55°C to 175°C and is RoHS3 compliant. The part is currently active in production with 721 units in stock. Alternative equivalent parts are available from multiple manufacturers to support supply chain flexibility and procurement requirements.

Substiute Parts

SA15CA-B

Littelfuse Inc.In Stock: 783SA15CA-B Datasheet

Current PartRFQ

SA15CA

Taiwan Semiconductor CorporationIn Stock: 16178SA15CA Datasheet

MFR RecommendedRFQ

SA15CA-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 6196SA15CA-E3/54 Datasheet

DirectRFQ

SA15CA-TP

Micro Commercial CoIn Stock: 10897SA15CA-TP Datasheet

DirectRFQ

P6KE18CA

Diotec SemiconductorIn Stock: 20652P6KE18CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SA15CA-B are qualified based on the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 15V nominal
• Voltage - Clamping (Max) @ Ipp: 24.4V maximum
• Current - Peak Pulse (10/1000µs): 20.9A nominal
• Power - Peak Pulse: 500W nominal
• Package / Case: DO-204AC or DO-15 axial through-hole
• Mounting Type: Through Hole
• Operating Temperature: -55°C to 175°C minimum range
• RoHS Compliance: ROHS3 Compliant

Parts meeting these specifications are electrically and mechanically interchangeable with the SA15CA-B in general-purpose TVS applications.

Parameter Comparison

Engineering Selection Recommendations

SA15CA, SA15CA-E3/54, and SA15CA-TP are direct electrical and mechanical equivalents to the SA15CA-B. All three parts maintain identical voltage ratings, clamping characteristics, and current handling within the specified 10/1000µs pulse profile. All substitute parts are active products with ROHS3 compliance and support the full operating temperature range of -55°C to 175°C.

P6KE18CA is a qualified alternative with higher performance specifications. This part exceeds the SA15CA-B in peak pulse current (25A vs. 20.9A) and power dissipation (600W vs. 500W), with marginally higher voltage clamping (25.2V vs. 24.4V). The P6KE18CA operates within the minimum temperature range (-50°C vs. -55°C) and does not carry ROHS3 compliance certification. Selection of P6KE18CA is appropriate for applications requiring enhanced transient suppression capability.

Frequently Asked Questions (FAQ)

Q: Can SA15CA replace SA15CA-B directly? A: Yes. SA15CA from Taiwan Semiconductor Corporation is a direct equivalent with identical electrical specifications and DO-204AC/DO-15 package compatibility. Both parts maintain 15V reverse standoff voltage, 24.4V clamping voltage, and 500W peak pulse power.

Q: What is the difference between SA15CA-E3/54 and SA15CA-B? A: SA15CA-E3/54 from Vishay is electrically equivalent with a 0.4A lower peak pulse current specification (20.5A vs. 20.9A). Both parts share identical voltage ratings and package configurations. The primary difference is packaging format: SA15CA-E3/54 is supplied in cut tape (CT) while SA15CA-B is supplied in bulk.

Q: Is SA15CA-TP compatible with SA15CA-B? A: Yes. SA15CA-TP from Micro Commercial Co. is a direct substitute with matching electrical parameters and through-hole DO-15 package. The part is supplied in cut tape format and maintains full temperature range operation from -55°C to 175°C.

Q: When should P6KE18CA be selected over SA15CA-B? A: P6KE18CA is selected when applications require higher transient suppression performance. This part provides 25A peak pulse current and 600W power dissipation compared to 20.9A and 500W for SA15CA-B. The higher clamping voltage (25.2V) is acceptable for general-purpose protection circuits. Note that P6KE18CA does not carry ROHS3 compliance.

Q: Are all substitute parts available in the same package? A: All substitute parts are available in DO-204AC or DO-15 axial through-hole packages. Packaging format (bulk, cut tape) varies by manufacturer and supplier. Verify specific packaging requirements with your procurement source.

Q: What is the minimum operating temperature for each part? A: SA15CA-B, SA15CA, SA15CA-E3/54, and SA15CA-TP all operate from -55°C minimum. P6KE18CA operates from -50°C minimum, which is acceptable for most general-purpose applications but does not extend to the full lower temperature range of the primary part.