5KP11 Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The 5KP11 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. The device features an 11V reverse standoff voltage rating, 5000W peak pulse power handling capability, and P600 axial through-hole packaging. The 5KP11 is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs and production continuity.

Substiute Parts

5KP11

Littelfuse Inc.In Stock: 12195KP11 Datasheet

Current PartRFQ

5KP11A

Littelfuse Inc.In Stock: 37495KP11A Datasheet

DirectRFQ

SLD11U-017-B

Littelfuse Inc.In Stock: 1078SLD11U-017-B Datasheet

MFR RecommendedRFQ

5KP11E3/TR13

Microchip TechnologyIn Stock: 6405KP11E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP11 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 11V
• Voltage - Clamping (Max) @ Ipp: Must remain within acceptable operating range
• Power - Peak Pulse: 5000W (5kW)
• Package / Case: P600, Axial through-hole
• Type: Zener, unidirectional
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• RoHS Compliance: ROHS3 Compliant

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in clamping voltage and peak pulse current are within the allowable tolerance band for this product category and do not affect functional compatibility in general-purpose transient suppression applications.

Parameter Comparison

Engineering Selection Recommendations

5KP11A (Littelfuse Inc.) is the primary direct substitute. This part maintains identical voltage ratings, power specifications, and package configuration as the 5KP11. The 5KP11A is in active production status with robust inventory availability (3700 pcs), ensuring supply chain continuity. It carries ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements.

SLD11U-017-B (Littelfuse Inc.) is an alternative substitute with automotive-grade qualification (AEC-Q101). This part is suitable for applications requiring automotive-level reliability and traceability. Electrical parameters are equivalent to the 5KP11A, with identical clamping voltage and peak pulse current specifications. Inventory availability is adequate (1061 pcs).

5KP11E3/TR13 (Microchip Technology) is a cross-manufacturer substitute manufactured by Microchip Technology. This part maintains the 11V reverse standoff voltage and 5000W peak pulse power rating. The clamping voltage is 20.1V with a peak pulse current of 249A, representing a minor variation within acceptable tolerance for general-purpose transient suppression. This option provides supply diversification from an alternative manufacturer.

All three substitute parts are ROHS3 compliant, operate across the -55°C to 175°C temperature range, and are packaged in P600 axial through-hole configuration, ensuring direct mechanical and electrical compatibility with the obsolete 5KP11.

Frequently Asked Questions (FAQ)

Q: Can the 5KP11A be used as a direct replacement for the 5KP11?

A: Yes. The 5KP11A maintains identical voltage ratings (11V reverse standoff), power specifications (5000W peak pulse), and P600 axial through-hole packaging. The primary difference is product status: the 5KP11 is obsolete while the 5KP11A is in active production.

Q: What is the difference between the 5KP11A and SLD11U-017-B?

A: Both parts share identical electrical specifications (11V standoff, 18.2V clamping voltage, 280.2A peak pulse current, 5000W power rating). The SLD11U-017-B carries automotive-grade qualification (AEC-Q101), making it suitable for automotive applications requiring higher reliability standards. Both are manufactured by Littelfuse Inc.

Q: Why does the 5KP11E3/TR13 have a different clamping voltage (20.1V vs. 18.2V)?

A: The 5KP11E3/TR13 is manufactured by Microchip Technology and exhibits a clamping voltage of 20.1V compared to 18.2V for the Littelfuse alternatives. This variation remains within acceptable tolerance for general-purpose transient voltage suppression and does not compromise functional compatibility. The 11V reverse standoff voltage and 5000W power rating are maintained.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts (5KP11A, SLD11U-017-B, and 5KP11E3/TR13) are ROHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited), meeting current environmental and regulatory requirements.

Q: What packaging formats are available for these substitutes?

A: The 5KP11A is supplied in Cut Tape (CT) packaging. The SLD11U-017-B is supplied in Bulk packaging. The 5KP11E3/TR13 is supplied in Tape & Reel (TR) format. All three maintain the same P600 axial through-hole component package, ensuring mechanical compatibility regardless of supply format.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. All substitute parts use identical P600 axial through-hole packaging and maintain the same lead spacing and mechanical footprint as the 5KP11, allowing direct board-level substitution without PCB redesign.