SA26CA Equivalent & Substitute Parts

Part Overview

The SA26CA is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This through-hole component operates with a reverse standoff voltage of 26V and provides peak pulse power dissipation of 500W. The device is Active in product status and RoHS3 compliant, making it suitable for modern electronic assemblies requiring transient voltage suppression in the 26V protection range.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining the same package form factor and functional application category.

Substiute Parts

SA26CA

LittelfuseIn Stock: 300311SA26CA Datasheet

Current PartRFQ

P6KE30CA

Diotec SemiconductorIn Stock: 33025P6KE30CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TVS diodes is determined by the following critical parameters:

• Reverse standoff voltage within ±10% tolerance of the primary part
• Breakdown voltage (minimum) within the specified range
• Clamping voltage performance compatible with circuit protection requirements
• Peak pulse current rating equal to or greater than the primary part
• Peak pulse power dissipation equal to or greater than the primary part
• Identical package form factor (DO-204AC / DO-15 axial through-hole)
• Bidirectional channel configuration matching the primary part
• Operating temperature range encompassing or exceeding the primary part specifications

The P6KE30CA from Diotec Semiconductor meets these substitution criteria with a reverse standoff voltage of 25.6V (within tolerance of 26V), compatible clamping voltage of 41.4V, and superior peak pulse current (15A) and power dissipation (600W) ratings.

Parameter Comparison

Engineering Selection Recommendations

Both the SA26CA and P6KE30CA are Active products suitable for current design implementations. The SA26CA is RoHS3 compliant with REACH Unaffected status. The P6KE30CA carries Active product status with a wider industrial availability footprint.

Selection between these parts should be based on:

• Supply chain availability and lead time requirements
• Inventory levels and procurement cost considerations
• Thermal management capability in the target application (P6KE30CA offers 20% higher power dissipation)
• Operating temperature floor requirement (SA26CA supports -55°C minimum versus P6KE30CA at -50°C minimum)
• Compliance documentation requirements specific to the end application

Both devices are mechanically and electrically compatible for direct substitution in DO-15 axial through-hole mounting positions.

Frequently Asked Questions (FAQ)

Q: Can the P6KE30CA directly replace the SA26CA in an existing circuit?

A: Yes. Both devices share identical package geometry (DO-204AC / DO-15 axial), bidirectional channel configuration, and compatible voltage parameters. The P6KE30CA provides equal or superior electrical performance across all critical parameters.

Q: What is the significance of the reverse standoff voltage difference (26V vs 25.6V)?

A: The 1.6% difference falls within standard component tolerance ranges for TVS diodes. Both parts trigger protection at comparable breakdown voltages (28.9V vs 28.5V) and clamp transients to similar maximum voltages (42.1V vs 41.4V).

Q: Why does the P6KE30CA have higher peak pulse current and power ratings?

A: The P6KE30CA is rated for 15A peak pulse current and 600W power dissipation compared to the SA26CA's 12.1A and 500W. This represents superior transient handling capability and provides additional design margin in high-energy surge environments.

Q: Are there temperature range considerations for substitution?

A: The SA26CA operates from -55°C to 175°C, while the P6KE30CA operates from -50°C to 175°C. For applications requiring operation below -50°C, the SA26CA is the appropriate selection. For standard industrial temperature ranges, both are equivalent.

Q: What compliance certifications apply to these parts?

A: The SA26CA is RoHS3 compliant and REACH unaffected. The P6KE30CA carries Active product status. Verify specific compliance requirements with your procurement or quality assurance department for your end application.