5KP8.5C-B Equivalent & Substitute Parts

Part Overview

The 5KP8.5C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This bidirectional zener diode features an 8.5V reverse standoff voltage and 15.12V maximum clamping voltage with 5000W peak pulse power handling capability in a through-hole P600 axial package.

The 5KP8.5C-B is classified as obsolete. Equivalent and substitute parts are available from active product lines that maintain the same electrical and mechanical specifications, ensuring continued availability for circuit designs requiring this voltage suppression rating.

Substiute Parts

5KP8.5C-B

Littelfuse Inc.In Stock: 11275KP8.5C-B Datasheet

Current PartRFQ

5KP8.5CA

Diotec SemiconductorIn Stock: 42515KP8.5CA Datasheet

DirectRFQ

5KP8.5CA-B

Littelfuse Inc.In Stock: 8405KP8.5CA-B Datasheet

DirectRFQ

SA8.5CA

Taiwan Semiconductor CorporationIn Stock: 16110SA8.5CA Datasheet

MFR RecommendedRFQ

5KP8.5CE3/TR13

Microchip TechnologyIn Stock: 10195KP8.5CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5KP8.5C-B are selected based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Voltage - Reverse Standoff (Typ): 8.5V
• Bidirectional Channels: 1
• Type: Zener
• Power - Peak Pulse: 5000W (5kW)
• Mounting Type: Through Hole
• RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

• Voltage - Breakdown (Min): 9.44V or higher
• Voltage - Clamping (Max) @ Ipp: 14.4V to 15.9V range
• Operating Temperature: -50°C to -55°C minimum, 175°C maximum
• Package / Case: P600 axial or DO-204AC (DO-15) axial

Substitutes are grouped into two categories based on package type: P600 axial package variants and DO-204AC (DO-15) axial package variants. All substitute parts maintain the 8.5V standoff voltage specification and 5000W power rating, with clamping voltages within acceptable operational ranges.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (P600 Package, 5000W Rating):

The 5KP8.5CA-B (Littelfuse Inc., Active) is the direct equivalent replacement. It maintains identical voltage specifications, power rating, and operating temperature range while offering active product status and bulk packaging availability.

The 5KP8.5CA (Diotec Semiconductor, Active) provides equivalent electrical performance in P600 axial package with tape and reel packaging. Operating temperature minimum is -50°C versus -55°C for the original part.

The 5KP8.5CE3/TR13 (Microchip Technology, Active) offers P600 axial package compatibility with clamping voltage of 15.9V, within acceptable range, and maintains full -55°C to 175°C operating temperature specification.

Alternative Substitute (DO-204AC Package, 500W Rating):

The SA8.5CA (Taiwan Semiconductor Corporation, Active) provides voltage equivalence with different package form factor (DO-204AC/DO-15 axial) and reduced power rating (500W versus 5000W). This substitute is suitable only for applications where peak pulse power requirements do not exceed 500W.

All substitute parts maintain ROHS3 compliance and are available from active product lines.

Frequently Asked Questions (FAQ)

Q: Can I use SA8.5CA as a direct replacement for 5KP8.5C-B?

A: SA8.5CA maintains the same 8.5V reverse standoff voltage and operating temperature range. However, it features a different package (DO-204AC versus P600) and reduced power rating (500W versus 5000W). Use SA8.5CA only if your circuit board layout accommodates DO-204AC package and peak pulse power requirements do not exceed 500W.

Q: What is the difference between 5KP8.5CA-B and 5KP8.5CA?

A: Both parts are electrically equivalent with 8.5V standoff voltage and 5000W power rating in P600 axial package. The primary difference is packaging format: 5KP8.5CA-B is supplied in bulk, while 5KP8.5CA is supplied in tape and reel. The 5KP8.5CA operating temperature minimum is -50°C compared to -55°C for 5KP8.5CA-B.

Q: Why does 5KP8.5CE3/TR13 have a higher clamping voltage (15.9V) than the original part (15.12V)?

A: Clamping voltage variation within the specified range (14.4V to 15.9V) is acceptable for TVS diode substitution. The 5KP8.5CE3/TR13 remains functionally equivalent as it maintains the 8.5V standoff voltage, 5000W power rating, and full operating temperature specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original 5KP8.5C-B specification.

Q: What is the minimum operating temperature for each substitute?

A: 5KP8.5CA-B, 5KP8.5CE3/TR13, and SA8.5CA operate from -55°C minimum. The 5KP8.5CA operates from -50°C minimum. Verify your application requirements before selection.