5KP85CA-B Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The 5KP85CA-B is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This bidirectional zener TVS diode operates with an 85V reverse standoff voltage and provides peak pulse power dissipation of 5000W. The part is currently in active production status with 686 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or packaging format preferences.

Substiute Parts

5KP85CA-B

Littelfuse Inc.In Stock: 7255KP85CA-B Datasheet

Current PartRFQ

5KP85CA

Diotec SemiconductorIn Stock: 46765KP85CA Datasheet

MFR RecommendedRFQ

5KP85CA-TP

Micro Commercial CoIn Stock: 11255KP85CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP85CA-B is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 85V
• Voltage - Breakdown (Min): 94.4V
• Voltage - Clamping (Max) @ Ipp: 137V
• Power - Peak Pulse: 5000W
• Type: Zener, Bidirectional
• Mounting Type: Through Hole
• RoHS Status: ROHS3 Compliant

Substitute parts must maintain identical electrical performance within these specifications. Packaging format (Bulk, Tape & Reel, Cut Tape) and supplier device package variations (P600, R-6) are acceptable substitution parameters when the core electrical characteristics remain equivalent. Peak pulse current may vary within acceptable design margins provided all other parameters are maintained.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain full electrical equivalence to the 5KP85CA-B across all critical voltage and power parameters. Selection between substitutes is based on the following engineering considerations:

5KP85CA (Diotec Semiconductor): This substitute maintains P600 axial package compatibility with the original part. The operating temperature minimum is -50°C compared to -55°C for the main part; this represents a 5°C reduction in lower temperature range. All other electrical specifications are equivalent. This part is available in Tape & Reel packaging format, suitable for automated assembly processes.

5KP85CA-TP (Micro Commercial Co): This substitute maintains the full -55 to 175°C operating temperature range of the original part. The package designation is R-6 axial, which is mechanically compatible with through-hole mounting but differs from the P600 package format. Peak pulse current is not specified in the provided data. This part is available in Cut Tape packaging format.

All three parts are ROHS3 compliant and maintain active product status. Selection should be based on packaging format requirements, inventory availability, and specific thermal operating range constraints of the application.

Frequently Asked Questions (FAQ)

Q: Can 5KP85CA (Diotec) be used as a direct replacement for 5KP85CA-B (Littelfuse)?

A: Yes. Both parts maintain identical voltage specifications (85V standoff, 94.4V breakdown, 137V clamping) and 5000W peak pulse power rating. The primary difference is the operating temperature minimum of -50°C versus -55°C. If the application operates above -50°C, this substitute is fully equivalent.

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

A: Both are axial through-hole packages for bidirectional TVS diodes. P600 and R-6 represent different supplier package designations but maintain compatible mechanical footprints for through-hole mounting. Physical dimensions may vary slightly; verify PCB layout compatibility before substitution.

Q: Are all three parts RoHS compliant?

A: Yes. The 5KP85CA-B, 5KP85CA, and 5KP85CA-TP are all ROHS3 compliant, meeting environmental and regulatory requirements for electronic component manufacturing.

Q: Does packaging format (Bulk, Tape & Reel, Cut Tape) affect electrical performance?

A: No. Packaging format is a supply chain and assembly consideration only. Electrical performance is identical regardless of whether the part is supplied in Bulk, Tape & Reel, or Cut Tape format.

Q: What is the significance of the peak pulse current specification?

A: Peak pulse current (37.2A for the main part, 36A for the Diotec substitute) indicates the maximum instantaneous current the TVS diode can conduct during a transient event. The 1.2A difference between these specifications is within acceptable design margins for general-purpose transient protection applications.

Q: Can I substitute based on packaging format alone?

A: No. Electrical parameters must match first. Packaging format is a secondary consideration after confirming voltage, power, and temperature specifications are equivalent.