SLD26CA-AP Equivalent & Substitute Parts Reference

Part Overview

The SLD26CA-AP is a 26V Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for interface protection applications. This bidirectional Zener-type TVS diode features a 42.1V maximum clamping voltage and 142A peak pulse current rating, with a peak pulse power dissipation of 6kW. The device is rated for automotive-grade applications and operates across a temperature range of -55°C to 175°C. With an active product status and 886 units in current inventory, the SLD26CA-AP serves as a primary component for transient voltage suppression in through-hole circuit configurations. Equivalent and substitute parts are identified to provide design flexibility, inventory alternatives, and sourcing options while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

SLD26CA-AP

Micro Commercial CoIn Stock: 926SLD26CA-AP Datasheet

Current PartRFQ

15KPA26CA

MDE Semiconductor IncIn Stock: 194015KPA26CA Datasheet

SimilarRFQ

20KPA26CA

MDE Semiconductor IncIn Stock: 166620KPA26CA Datasheet

SimilarRFQ

5KP26CA

Diotec SemiconductorIn Stock: 42065KP26CA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of TVS diodes is determined by strict alignment of electrical parameters that define transient suppression performance. The following criteria establish valid substitution relationships for the SLD26CA-AP:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): Must equal 26V
• Voltage - Breakdown (Min): Must fall within 28.9V to 29.04V range
• Bidirectional Channels: Must equal 1
• Type: Must be Zener
• Mounting Type: Must be Through Hole
• Operating Temperature Range: Must encompass -55°C to 175°C minimum

Secondary Compatibility Parameters:

• Voltage - Clamping (Max) @ Ipp: Acceptable range 42.1V to 44.7V
• Current - Peak Pulse (10/1000µs): Acceptable range 119A to 451.9A
• Power - Peak Pulse: Acceptable range 5000W to 20000W
• Package / Case: R-6 or P600 axial packages

All identified substitute parts meet these criteria and are classified as active products with current inventory availability.

Parameter Comparison

Engineering Selection Recommendations

5KP26CA (Diotec Semiconductor)

The 5KP26CA is electrically equivalent to the SLD26CA-AP with identical voltage parameters (28.9V breakdown, 42.1V clamping). Peak pulse current is 119A compared to 142A in the main part, with corresponding power dissipation of 5000W versus 6000W. This substitute is suitable for applications where peak transient energy is within the 5kW specification. The 5KP26CA is ROHS3 compliant and available in P600 axial package with 4100 units in inventory. Operating temperature range is -50°C to 175°C, which covers the primary operating window but does not extend to the -55°C minimum of the SLD26CA-AP. This part is packaged in Tape & Reel format.

15KPA26CA (MDE Semiconductor Inc)

The 15KPA26CA maintains the 26V reverse standoff voltage with breakdown at 29.04V and clamping voltage of 44V. Peak pulse current is 343.2A with 15000W power dissipation, representing a higher energy rating than the main part. This substitute accommodates applications requiring greater transient suppression capacity. The 15KPA26CA is ROHS3 compliant, operates across -55°C to 175°C, and is available in P600 axial package with 1903 units in inventory. Moisture sensitivity level is rated as 1 (Unlimited).

20KPA26CA (MDE Semiconductor Inc)

The 20KPA26CA provides the highest energy rating among substitutes with 451.9A peak pulse current and 20000W power dissipation. Voltage parameters are 26V reverse standoff, 29.04V breakdown, and 44.7V clamping. This part is specified for applications requiring maximum transient protection within the 26V class. The 20KPA26CA is ROHS3 compliant, REACH Unaffected, operates across -55°C to 175°C, and is available in P600 axial package with 1629 units in inventory.

All substitute parts maintain active product status and are suitable for direct component selection based on application transient energy requirements and thermal design constraints.

Frequently Asked Questions (FAQ)

Q: Can the 5KP26CA replace the SLD26CA-AP in all applications?

A: The 5KP26CA is electrically compatible for voltage suppression function with identical clamping characteristics (42.1V). However, the lower peak pulse current (119A versus 142A) and power rating (5000W versus 6000W) restrict its use to applications where transient energy does not exceed 5kW. Additionally, the minimum operating temperature is -50°C rather than -55°C. Verify application transient specifications before substitution.

Q: What is the difference between the 15KPA26CA and 20KPA26CA?

A: Both parts maintain identical voltage parameters (26V reverse standoff, 29.04V breakdown). The primary difference is peak pulse current and power dissipation: the 15KPA26CA is rated for 343.2A and 15000W, while the 20KPA26CA is rated for 451.9A and 20000W. Selection depends on the maximum transient energy the circuit must suppress. Both operate across -55°C to 175°C and are ROHS3 compliant.

Q: Are there package compatibility considerations between R-6 and P600 axial packages?

A: Both R-6 and P600 are axial through-hole packages suitable for PCB mounting. Physical dimensions differ between packages. Verify PCB footprint and lead spacing compatibility before substitution. The R-6 package (main part) and P600 package (substitute parts) are not mechanically interchangeable without PCB redesign.

Q: Which substitute part is recommended for automotive-grade applications?

A: The SLD26CA-AP is specified as automotive-grade. The substitute parts (5KP26CA, 15KPA26CA, 20KPA26CA) are listed as general-purpose TVS diodes without explicit automotive-grade designation. If automotive qualification is required, verify with the component manufacturer or design authority before substitution.

Q: How do clamping voltage differences affect circuit protection?

A: The SLD26CA-AP clamps at 42.1V maximum. The 15KPA26CA and 20KPA26CA clamp at 44V and 44.7V respectively. Higher clamping voltages allow greater transient voltage to reach protected circuitry. For sensitive components with strict voltage limits, the lower clamping voltage of the SLD26CA-AP or 5KP26CA may be preferable. Verify protected component absolute maximum ratings against clamping voltage specifications.

Q: What does REACH Unaffected status indicate?

A: REACH Unaffected status indicates the component is not subject to REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) regulatory requirements. The SLD26CA-AP and 20KPA26CA carry this designation. The 5KP26CA and 15KPA26CA list REACH information as available upon request, indicating potential regulatory documentation requirements.

Q: Can these TVS diodes be used interchangeably in existing PCB designs?

A: Electrical substitution is possible within the specified voltage and current parameters. However, mechanical package differences (R-6 versus P600) require PCB footprint verification. Additionally, thermal design must accommodate the different power dissipation ratings. Consult circuit design specifications and thermal analysis before implementing substitution in production designs.