5KP75-B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 5KP75-B is a unidirectional Zener-type transient voltage suppressor manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 75V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package. The 5KP75-B is classified as obsolete, making identification of functionally equivalent active alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

5KP75-B

LittelfuseIn Stock: 11365KP75-B Datasheet

Current PartRFQ

5KP75A

Littelfuse Inc.In Stock: 42025KP75A Datasheet

DirectRFQ

5KP75A-B

Littelfuse Inc.In Stock: 7955KP75A-B Datasheet

DirectRFQ

5KP75E3/TR13

Microchip TechnologyIn Stock: 8535KP75E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP75-B is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 75V (primary rating)
• Voltage - Breakdown (Min): 78.93V minimum threshold
• Power - Peak Pulse: 5000W (5kW) capability
• Unidirectional Channels: 1 (single direction protection)
• Mounting Type: Through Hole
• Package / Case: P600, Axial form factor
• Operating Temperature Range: -55°C to 175°C (TJ)
• Type: Zener diode construction

Substitute parts must maintain identical or tighter specifications across all parameters listed above. Variations in clamping voltage and peak pulse current are permissible provided they remain within the functional operating envelope of the original design.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Littelfuse 5KP75A Series)

The 5KP75A and 5KP75A-B are direct functional equivalents manufactured by Littelfuse with active product status. Both maintain the 75V reverse standoff voltage, 5000W peak pulse power rating, and P600 axial package specification. The 5KP75A is available in Cut Tape packaging with 4100 units in stock, while the 5KP75A-B is available in Bulk packaging with 746 units in stock. Both parts are ROHS3 compliant and carry REACH Unaffected status, ensuring regulatory compliance for new designs.

Alternative Substitute (Microchip Technology 5KP75E3/TR13)

The 5KP75E3/TR13 is a manufacturer-recommended alternative from Microchip Technology, maintaining the 75V reverse standoff voltage and 5000W peak pulse power rating in the same P600 axial package. This part features a 134V maximum clamping voltage compared to 121V for the Littelfuse alternatives, representing a 10.7% increase in clamping performance. The 5KP75E3/TR13 is available in Tape & Reel packaging with 825 units in stock and carries ROHS3 compliance and REACH Unaffected status.

All three substitute parts satisfy the critical electrical and mechanical parameters of the obsolete 5KP75-B and are suitable for direct replacement in through-hole PCB applications requiring 75V transient voltage suppression.

Frequently Asked Questions (FAQ)

Q: Can the 5KP75A directly replace the obsolete 5KP75-B?

A: Yes. The 5KP75A maintains identical reverse standoff voltage (75V), peak pulse power (5000W), operating temperature range (-55°C to 175°C), and P600 axial package specification. Both are unidirectional Zener-type TVS diodes with through-hole mounting. The primary difference is product status: 5KP75-B is obsolete while 5KP75A is active.

Q: What is the difference between 5KP75A and 5KP75A-B?

A: Both parts are electrically identical with matching voltage ratings, power handling, and temperature specifications. The difference is packaging: 5KP75A is supplied in Cut Tape (CT) format, while 5KP75A-B is supplied in Bulk format. Selection depends on procurement and assembly requirements.

Q: Why does the 5KP75E3/TR13 have a higher clamping voltage (134V vs 121V)?

A: The 5KP75E3/TR13 from Microchip Technology exhibits a 134V maximum clamping voltage compared to 121V for the Littelfuse alternatives, while maintaining the same 75V reverse standoff rating and 5000W power capability. This represents a design variation within the 75V TVS category and remains functionally compatible for general-purpose overvoltage protection applications.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All three substitute parts (5KP75A, 5KP75A-B, and 5KP75E3/TR13) are ROHS3 compliant and carry REACH Unaffected status, ensuring regulatory compliance for applications requiring environmental and hazardous substance restrictions.

Q: Can I use these parts interchangeably in existing PCB designs?

A: Yes. All substitute parts share identical through-hole P600 axial package specifications and mounting footprints. No PCB layout modifications are required for substitution. Electrical performance remains within the design envelope of the original 5KP75-B specification.

Q: Which substitute should I select for new production?

A: Selection depends on packaging requirements and inventory availability. The 5KP75A (Cut Tape) and 5KP75A-B (Bulk) are Littelfuse products with the lowest clamping voltage (121V). The 5KP75E3/TR13 (Tape & Reel) is a Microchip alternative with higher clamping voltage (134V). All three are active products suitable for new designs.