Equivalent & Substitute Parts for 5KP12 TVS Diode

Part Overview

The 5KP12 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features a 12V reverse standoff voltage, 5000W peak pulse power rating, and P600 axial through-hole packaging. The 5KP12 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility within the specified voltage and power parameters while meeting current product availability and compliance standards.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	12	V
Voltage - Breakdown (Min)	12.6	V
Voltage - Clamping (Max) @ Ipp	20.9	V
Power - Peak Pulse	5000	W
Type	Zener	-
Unidirectional Channels	1	-
Mounting Type	Through Hole	-
Package / Case	P600, Axial	-
Operating Temperature	-55 to 175	°C (TJ)
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution for the 5KP12 TVS diode is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): Must equal 12V
Power - Peak Pulse: Must equal 5000W
Mounting Type: Must be Through Hole
Package / Case: Must be P600, Axial
Type: Must be Zener unidirectional TVS diode
Operating Temperature Range: Must support -55°C to 175°C (TJ)

The substitute parts identified maintain these core electrical and mechanical specifications. Variations in voltage clamping characteristics and peak pulse current are acceptable within the defined parameter ranges, as these represent performance characteristics of equivalent protection devices.

Parameter Comparison

Parameter	5KP12 (Main)	5KP12A	SLD12U-017-B	5KP12E3/TR13
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Microchip Technology
Voltage - Reverse Standoff (Typ)	12V	12V	12V	12V
Voltage - Breakdown (Min)	12.6V	13.3V	13.3V	13.3V
Voltage - Clamping (Max) @ Ipp	20.9V	19.9V	19.9V	22V
Current - Peak Pulse (10/1000µs)	-	256.3A	256.3A	227A
Power - Peak Pulse	5000W	5000W	5000W	5000W
Type	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	P600, Axial	P600, Axial	P600, Axial	P600, Axial
Operating Temperature	-55 to 175°C (TJ)	-55 to 175°C (TJ)	-55 to 175°C (TJ)	-55 to 175°C (TJ)
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

5KP12A (Littelfuse Inc., Active Status): Direct functional equivalent with identical reverse standoff voltage, breakdown voltage, and power rating. Available in Cut Tape packaging with 4400 units in stock. Suitable for standard production applications requiring active component availability.

SLD12U-017-B (Littelfuse Inc., Active Status, AEC-Q101 Qualified): Manufacturer-recommended replacement with automotive-grade qualification and AEC-Q101 certification. Maintains equivalent electrical parameters with 1148 units in stock. Recommended for applications requiring automotive-grade reliability and traceability.

5KP12E3/TR13 (Microchip Technology, Active Status): Alternative source from Microchip Technology with identical reverse standoff voltage and power rating. Voltage clamping at 22V represents upper tolerance range. Available in Tape & Reel packaging with 942 units in stock. Suitable for applications where multi-source qualification is required.

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and operating temperature range compatibility with the original 5KP12 specification.

Frequently Asked Questions (FAQ)

Q: Can 5KP12A be used as a direct replacement for 5KP12? A: Yes. The 5KP12A maintains identical reverse standoff voltage (12V), breakdown voltage (13.3V minimum), and peak pulse power (5000W). Both use P600 axial through-hole packaging. The primary difference is product status: 5KP12A is active production while 5KP12 is obsolete.

Q: What is the significance of voltage clamping differences between substitute parts? A: Voltage clamping at maximum peak pulse current (Ipp) determines the peak voltage the device allows across the protected circuit. The 5KP12 specifies 20.9V maximum clamping, while 5KP12A and SLD12U-017-B specify 19.9V, and 5KP12E3/TR13 specifies 22V. All values remain within acceptable protection parameters for 12V standoff applications.

Q: Is SLD12U-017-B suitable for automotive applications? A: Yes. SLD12U-017-B carries AEC-Q101 automotive qualification and is designated as automotive-grade. This part is recommended for applications requiring automotive reliability standards and traceability documentation.

Q: Are all substitute parts available in the same packaging format? A: All substitute parts use P600 axial through-hole packaging, ensuring mechanical compatibility. Packaging options differ: 5KP12A is available in Cut Tape, SLD12U-017-B in Bulk, and 5KP12E3/TR13 in Tape & Reel. Select based on procurement and assembly requirements.

Q: Do substitute parts maintain the same operating temperature range? A: Yes. All substitute parts operate across -55°C to 175°C (TJ), matching the original 5KP12 specification.

Q: What compliance certifications apply to all substitute parts? A: All substitute parts are ROHS3 compliant with MSL Level 1 (Unlimited moisture sensitivity). SLD12U-017-B additionally carries AEC-Q101 automotive qualification and REACH Unaffected status.

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