SA26C-B Equivalent & Substitute Parts

Part Overview

The SA26C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in through-hole applications. This bidirectional Zener diode operates with a 26V reverse standoff voltage and provides peak pulse power handling of 500W in a DO-204AC (DO-15) axial package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement.

Substiute Parts

SA26C-B

Littelfuse Inc.In Stock: 1041SA26C-B Datasheet

Current PartRFQ

SA26CA-B

LittelfuseIn Stock: 946SA26CA-B Datasheet

DirectRFQ

SA26CA

Taiwan Semiconductor CorporationIn Stock: 300320SA26CA Datasheet

MFR RecommendedRFQ

P6KE30CA

Diotec SemiconductorIn Stock: 33025P6KE30CA Datasheet

MFR RecommendedRFQ

SA26CA-AP

Micro Commercial CoIn Stock: 1003SA26CA-AP Datasheet

MFR RecommendedRFQ

SA26CA-BP

Micro Commercial CoIn Stock: 1056SA26CA-BP Datasheet

MFR RecommendedRFQ

SA26CA-TP

Micro Commercial CoIn Stock: 1105SA26CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SA26C-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 26V ± tolerance
• Voltage - Clamping (Max) @ Ipp: Within acceptable range for circuit protection
• Current - Peak Pulse (10/1000µs): Minimum 12.1A
• Power - Peak Pulse: Minimum 500W
• Package / Case: DO-204AC or DO-15 (axial through-hole)
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C to 175°C (TJ)
• Bidirectional Channels: 1

Substitute parts are grouped into two categories:

Direct Equivalents (Littelfuse SA26CA-B): Identical electrical specifications with minor clamping voltage variation (42.1V vs 44.21V), same manufacturer series, active product status.

Functional Equivalents (SA26CA, P6KE30CA, SA26CA-AP, SA26CA-BP, SA26CA-TP): Meet or exceed core protection parameters with compatible package and mounting specifications. These parts maintain the 26V reverse standoff voltage and support the required peak pulse current and power ratings.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SA26CA-B

SA26CA-B is the direct equivalent from Littelfuse, the original manufacturer of the SA26C-B. It maintains identical electrical specifications with a clamping voltage of 42.1V (compared to 44.21V in the original), operates across the same temperature range (-55°C to 175°C), and is ROHS3 compliant. As an active product with 886 units in stock, it provides continuity with the original design intent and manufacturer support.

Secondary Recommendation: SA26CA-AP, SA26CA-BP, SA26CA-TP

These Micro Commercial Co variants provide identical electrical performance to SA26CA-B with 42.1V clamping voltage, 12.1A peak pulse current, and 500W power rating. All three maintain the required 26V reverse standoff voltage and -55°C to 175°C operating temperature range. These parts are active products with substantial inventory availability (915–1,078 units).

Alternative Recommendation: P6KE30CA

The P6KE30CA from Diotec Semiconductor offers enhanced specifications with 15A peak pulse current and 600W power rating, exceeding the SA26C-B requirements. It maintains a 25.6V reverse standoff voltage and 41.4V clamping voltage, suitable for applications requiring higher transient protection margins. Operating temperature range is -50°C to 175°C (5°C higher minimum than the original). RoHS compliance status is not applicable for this part.

Tertiary Recommendation: SA26CA

The SA26CA from Taiwan Semiconductor Corporation is an active product with the largest inventory (300,300 units). It maintains the 26V reverse standoff voltage and -55°C to 175°C operating temperature range. The clamping voltage is 54.6V with 12.4A peak pulse current, both within acceptable protection parameters. ROHS3 compliance and REACH unaffected status are confirmed.

Frequently Asked Questions (FAQ)

Q: Can SA26CA-B be used as a direct replacement for SA26C-B?

A: Yes. SA26CA-B is the direct equivalent from Littelfuse with identical reverse standoff voltage (26V), peak pulse current (12.1A), and power rating (500W). The clamping voltage differs slightly (42.1V vs 44.21V), but both values fall within acceptable protection parameters for general-purpose TVS applications. Both parts use the DO-204AC (DO-15) axial through-hole package.

Q: What is the difference between SA26CA-B and the Micro Commercial Co variants (SA26CA-AP, SA26CA-BP, SA26CA-TP)?

A: All four parts share identical electrical specifications: 26V reverse standoff voltage, 42.1V clamping voltage, 12.1A peak pulse current, and 500W power rating. The primary differences are manufacturer and packaging designation. SA26CA-B is from Littelfuse, while SA26CA-AP, SA26CA-BP, and SA26CA-TP are from Micro Commercial Co. All are compatible with the original SA26C-B application.

Q: Is P6KE30CA a suitable substitute?

A: Yes, P6KE30CA is a functional equivalent with enhanced specifications. It provides 15A peak pulse current and 600W power rating, exceeding the SA26C-B requirements. The reverse standoff voltage is 25.6V (0.4V lower than the original 26V) and clamping voltage is 41.4V. The operating temperature minimum is -50°C instead of -55°C. These differences are acceptable for most general-purpose protection applications.

Q: Why does SA26CA have a higher clamping voltage (54.6V) than SA26C-B (44.21V)?

A: Clamping voltage variation within the same reverse standoff voltage class is normal for TVS diodes and reflects manufacturing tolerances and design differences between manufacturers. SA26CA's 54.6V clamping voltage still provides effective transient suppression at the 26V standoff level. The higher clamping voltage may be preferable in applications where lower clamping is not critical.

Q: Are all substitute parts available in the same DO-204AC (DO-15) package?

A: Yes. All substitute parts listed are available in DO-204AC or DO-15 axial through-hole packages, ensuring mechanical and electrical compatibility with the original SA26C-B footprint and circuit board layout.

Q: What is the inventory status of these substitute parts?

A: SA26CA-B has 886 units in stock. The Micro Commercial Co variants (SA26CA-AP, SA26CA-BP, SA26CA-TP) have 915, 1,014, and 1,078 units respectively. SA26CA has the largest inventory with 300,300 units. P6KE30CA has 32,964 units available.

Q: Are all substitute parts ROHS3 compliant?

A: SA26CA-B, SA26CA, SA26CA-AP, SA26CA-BP, and SA26CA-TP are ROHS3 compliant. P6KE30CA has RoHS status listed as not applicable. Verify RoHS compliance requirements for your specific application before final part selection.