5KP70-B Equivalent & Substitute Parts

Part Overview

The 5KP70-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose transient voltage protection applications. This component features a 70V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package. The 5KP70-B is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage ratings, power dissipation, and thermal operating ranges while meeting current product availability and compliance standards.

Substiute Parts

5KP70-B

LittelfuseIn Stock: 7945KP70-B Datasheet

Current PartRFQ

5KP70A

Littelfuse Inc.In Stock: 48135KP70A Datasheet

DirectRFQ

5KP70A-B

Littelfuse Inc.In Stock: 9625KP70A-B Datasheet

DirectRFQ

5KP70E3/TR13

Microchip TechnologyIn Stock: 10915KP70E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP70-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must equal 70V to maintain circuit protection thresholds
• Power - Peak Pulse: Must equal 5000W to ensure equivalent transient energy dissipation capability
• Package / Case: Must be P600 axial through-hole to ensure mechanical and electrical compatibility
• Type: Must be Zener unidirectional TVS diode
• Unidirectional Channels: Must equal 1 channel
• Operating Temperature Range: Must support -55°C to 175°C (TJ)

Substitute parts are grouped into two categories:

Category 1 - Direct Electrical Equivalents (Littelfuse 5KP Series): Parts 5KP70A and 5KP70A-B maintain identical reverse standoff voltage (70V) and peak pulse power (5000W) with minor variations in clamping voltage and peak pulse current. These parts are functionally interchangeable from an electrical protection standpoint.

Category 2 - Manufacturer-Recommended Alternative (Microchip Technology): Part 5KP70E3/TR13 is designated as manufacturer-recommended and maintains the same reverse standoff voltage (70V) and peak pulse power (5000W) with a higher clamping voltage specification (125V vs. 118.65V).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Littelfuse 5KP70A or 5KP70A-B)

The 5KP70A and 5KP70A-B are active-status Littelfuse products that provide direct electrical substitution for the obsolete 5KP70-B. Both maintain the critical 70V reverse standoff voltage and 5000W peak pulse power specifications. The 5KP70A is available in Cut Tape packaging with 4710 units in stock, while the 5KP70A-B is available in Bulk packaging with 911 units in stock. Both are ROHS3 compliant with MSL 1 rating. Selection between these two should be based on packaging requirements for your manufacturing process.

For Cross-Manufacturer Substitution (Microchip Technology 5KP70E3/TR13)

The 5KP70E3/TR13 is designated as manufacturer-recommended and represents an active-status alternative from Microchip Technology. This part maintains the 70V reverse standoff voltage and 5000W peak pulse power while offering a higher clamping voltage specification (125V). The part is available in Tape & Reel packaging with 1043 units in stock and is ROHS3 compliant with MSL 1 rating. This option is suitable when cross-manufacturer sourcing is required or when higher clamping voltage performance is acceptable for the application.

All substitute parts meet the same compliance standards (ROHS3, MSL 1, EAR99 ECCN classification) as the original 5KP70-B.

Frequently Asked Questions (FAQ)

Q: Can I use 5KP70A as a direct replacement for 5KP70-B?

A: Yes. The 5KP70A maintains identical reverse standoff voltage (70V) and peak pulse power (5000W) specifications. The primary difference is product status (active vs. obsolete) and packaging format. Both are through-hole P600 axial packages suitable for the same PCB footprint.

Q: What is the difference between 5KP70A and 5KP70A-B?

A: Both parts are electrically identical with the same voltage and power ratings. The difference is packaging: 5KP70A is supplied in Cut Tape format, while 5KP70A-B is supplied in Bulk format. Selection depends on your manufacturing process requirements.

Q: Why does the 5KP70E3/TR13 have a higher clamping voltage (125V vs. 118.65V)?

A: The 5KP70E3/TR13 is a Microchip Technology product with different internal design specifications. Both parts maintain the same 70V reverse standoff voltage and 5000W power rating, but the clamping voltage specification differs. This is acceptable for substitution as long as your circuit design tolerates the higher clamping voltage.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The 5KP70-B and all listed substitute parts (5KP70A, 5KP70A-B, 5KP70E3/TR13) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: What packaging options are available for substitutes?

A: The 5KP70A is available in Cut Tape (CT) packaging. The 5KP70A-B is available in Bulk packaging. The 5KP70E3/TR13 is available in Tape & Reel (TR) packaging. All maintain the same P600 axial through-hole form factor.

Q: Can I mix substitute parts in the same production run?

A: Yes. All substitute parts are electrically compatible and use the same P600 axial through-hole package. However, verify that your procurement and quality control processes accommodate multiple manufacturer sources if using both Littelfuse and Microchip parts.