5KP11C Equivalent & Substitute Parts

Part Overview

The 5KP11C is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features an 11V reverse standoff voltage rating and 5000W peak pulse power handling capability in a P600 axial through-hole package. The 5KP11C 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 accommodating modern packaging and availability constraints.

Substiute Parts

5KP11C

Littelfuse Inc.In Stock: 6705KP11C Datasheet

Current PartRFQ

5KP11CA

Littelfuse Inc.In Stock: 35105KP11CA Datasheet

DirectRFQ

SLD11-018-B

Littelfuse Inc.In Stock: 1249SLD11-018-B Datasheet

MFR RecommendedRFQ

5KP11CE3/TR13

Microchip TechnologyIn Stock: 6655KP11CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP11C is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must equal 11V
• Bidirectional Channels: Must equal 1
• Power - Peak Pulse: Must equal 5000W (5kW)
• Type: Must be Zener
• Mounting Type: Must be Through Hole
• Package / Case: Must be P600, Axial
• Operating Temperature Range: Must encompass -55°C ~ 175°C (TJ)
• RoHS Status: Must maintain ROHS3 Compliance

All identified substitute parts meet these core electrical and mechanical requirements. Variations in clamping voltage and peak pulse current are within acceptable tolerances for the TVS diode category and do not preclude functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

5KP11CA (Littelfuse Inc., Active Status): Direct manufacturer equivalent with identical electrical specifications and active product status. Available in Cut Tape packaging with 3400 units in stock. Recommended as primary substitute for new designs and production continuity.

SLD11-018-B (Littelfuse Inc., Active Status): Manufacturer-recommended equivalent with AEC-Q101 automotive qualification. Identical electrical performance to 5KP11CA. Available in Bulk packaging with 1168 units in stock. Suitable for applications requiring automotive-grade components.

5KP11CE3/TR13 (Microchip Technology, Active Status): Manufacturer-recommended equivalent with marginally higher clamping voltage (20.1V vs. 18.2V) and lower peak pulse current (249A vs. 280.2A). Available in Tape & Reel packaging with 641 units in stock. Acceptable substitute where Microchip sourcing is preferred or required.

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring compatibility with modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can 5KP11CA be used as a direct replacement for 5KP11C?

A: Yes. The 5KP11CA maintains identical reverse standoff voltage (11V), power rating (5000W), package type (P600 axial), and operating temperature range (-55°C to 175°C). The primary difference is product status: 5KP11CA is active while 5KP11C is obsolete.

Q: What is the significance of the clamping voltage difference between 5KP11CA (18.2V) and 5KP11CE3/TR13 (20.1V)?

A: Both values fall within acceptable TVS diode performance tolerances for the 11V standoff class. The clamping voltage represents the maximum voltage across the device during transient suppression. Selection between these parts depends on circuit protection requirements; lower clamping voltage (5KP11CA) provides tighter voltage regulation, while higher clamping voltage (5KP11CE3/TR13) allows greater transient energy absorption.

Q: Are packaging differences between Cut Tape, Bulk, and Tape & Reel significant for substitution?

A: Packaging differences affect procurement and assembly processes but do not impact electrical performance or functional equivalence. All three substitute parts use identical P600 axial through-hole packages. Packaging selection depends on production volume and assembly equipment compatibility.

Q: Does SLD11-018-B automotive qualification affect its use in non-automotive applications?

A: No. AEC-Q101 qualification indicates enhanced reliability testing and quality assurance. SLD11-018-B is fully compatible with general-purpose applications and offers equivalent or superior performance compared to non-automotive-qualified alternatives.

Q: What is the impact of the peak pulse current variation (280.2A vs. 249A) on circuit design?

A: Peak pulse current indicates the maximum current the device can conduct during transient suppression at specified pulse conditions. Both values are within the 5000W power rating envelope. Circuit design should reference the power dissipation specification rather than peak current alone to ensure adequate protection.