5KP70CA-B Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 5KP70CA-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 with a 70V reverse standoff voltage and provides 5000W peak pulse power dissipation capability. The part is currently active in production with full inventory availability. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility to support procurement flexibility and supply chain continuity.

Substiute Parts

5KP70CA-B

Littelfuse Inc.In Stock: 6965KP70CA-B Datasheet

Current PartRFQ

5KP70CA

Diotec SemiconductorIn Stock: 37915KP70CA Datasheet

MFR RecommendedRFQ

5KP70CA-TP

Micro Commercial CoIn Stock: 13865KP70CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5KP70CA-B are qualified based on the following critical parameters that determine functional equivalence:

• Voltage - Reverse Standoff: 70V (exact match required)
• Voltage - Clamping (Max) @ Ipp: 113V (exact match required)
• Power - Peak Pulse: 5000W (exact match required)
• Mounting Type: Through Hole (exact match required)
• Bidirectional Channels: 1 (exact match required)
• Type: Zener (exact match required)

The identified substitutes maintain these core electrical and mechanical specifications. Variations in peak pulse current, package designation, and operating temperature ranges are noted but do not preclude substitution when the primary protection parameters align.

Parameter Comparison

Engineering Selection Recommendations

All three parts meet the core electrical requirements for 70V TVS diode applications with 5000W peak pulse power handling. Selection should be based on the following factors:

5KP70CA-B (Littelfuse Inc.): Primary specification with full compliance documentation. ROHS3 compliant, REACH unaffected, and MSL Level 1. Operating temperature range -55°C to 175°C. Recommended for applications requiring verified RoHS and REACH compliance.

5KP70CA (Diotec Semiconductor): Functionally equivalent with 44A peak pulse current (1.1A lower than primary part). Operating temperature minimum of -50°C (5°C higher than primary part). RoHS status not applicable and REACH status vendor undefined. Suitable for applications where compliance documentation is not a requirement.

5KP70CA-TP (Micro Commercial Co): Functionally equivalent with R-6 package designation (alternative axial package to P600). ROHS3 compliant and REACH unaffected with MSL Level 1. Operating temperature range -55°C to 175°C. Peak pulse current not specified in available data. Suitable for applications where package form factor compatibility with R-6 designation is acceptable.

Frequently Asked Questions (FAQ)

Q: Can 5KP70CA (Diotec) be used as a direct replacement for 5KP70CA-B (Littelfuse)?

A: Yes, for applications where RoHS and REACH compliance documentation is not required. The electrical specifications are equivalent with a minor 1.1A reduction in peak pulse current and a 5°C higher minimum operating temperature. Verify compliance requirements for your application before substitution.

Q: What is the difference between P600 and R-6 package designations?

A: Both are axial through-hole packages for TVS diodes. P600 and R-6 are alternative package designations from different manufacturers. Physical compatibility should be verified against your PCB layout and component placement specifications before substitution.

Q: Are all three parts suitable for -55°C operating environments?

A: The 5KP70CA-B and 5KP70CA-TP both specify -55°C minimum operating temperature. The 5KP70CA (Diotec) specifies -50°C minimum, making it unsuitable for applications requiring operation below -50°C.

Q: Which substitute part has the best compliance documentation?

A: Both 5KP70CA-B (Littelfuse) and 5KP70CA-TP (Micro Commercial Co) are ROHS3 compliant and REACH unaffected. The 5KP70CA (Diotec) has undefined REACH status and non-applicable RoHS status. For regulated applications, use either the Littelfuse or Micro Commercial Co parts.

Q: Is peak pulse current a critical parameter for substitution?

A: Peak pulse current should be evaluated against your circuit protection requirements. The 5KP70CA-B specifies 45.1A, the 5KP70CA specifies 44A (1.1A lower), and the 5KP70CA-TP does not specify this parameter. If your application requires the full 45.1A capability, verify the substitute part's actual current rating before use.