5KP7.5-B Equivalent & Substitute Parts

Part Overview

The 5KP7.5-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 7.5V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package. The part is currently listed as obsolete, making identification of functionally equivalent active alternatives essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	7.5V
Voltage - Breakdown (Min)	7.89V
Voltage - Clamping (Max) @ Ipp	14.65V
Power - Peak Pulse	5000W (5kW)
Type	Zener
Unidirectional Channels	1
Mounting Type	Through Hole
Package / Case	P600, Axial
Operating Temperature	-55°C ~ 175°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP7.5-B is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): Must be 7.5V
Power - Peak Pulse: Must be 5000W (5kW)
Type: Must be Zener unidirectional TVS diode
Unidirectional Channels: Must be 1
Mounting Type: Must be Through Hole
Operating Temperature Range: Must support -55°C ~ 175°C (TJ)
RoHS Status: Must maintain ROHS3 Compliance

The substitute parts identified below meet all mandatory electrical and mechanical parameters. Variations in voltage clamping characteristics and peak pulse current are within acceptable tolerance ranges for this product category and do not preclude functional equivalence.

Parameter Comparison

Parameter	5KP7.5-B (Main)	5KP7.5A	5KP7.5A-B	5KP7.5A-TP	5KP7.5E3/TR13
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	Micro Commercial Co	Microchip Technology
Voltage - Reverse Standoff (Typ)	7.5V	7.5V	7.5V	7.5V	7.5V
Voltage - Breakdown (Min)	7.89V	8.33V	8.33V	8.33V	8.33V
Voltage - Clamping (Max) @ Ipp	14.65V	12.9V	12.9V	12.9V	14.3V
Current - Peak Pulse (10/1000µs)	Not specified	395.3A	395.3A	Not specified	350A
Power - Peak Pulse	5000W (5kW)	5000W (5kW)	5000W (5kW)	5000W (5kW)	5000W (5kW)
Type	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1	1
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	P600, Axial	P600, Axial	P600, Axial	R-6, Axial	P600, Axial
Operating Temperature	-55°C ~ 175°C (TJ)	-55°C ~ 175°C (TJ)	-55°C ~ 175°C (TJ)	-55°C ~ 175°C (TJ)	-55°C ~ 175°C (TJ)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All identified substitute parts maintain active product status and ROHS3 compliance, providing long-term supply chain viability compared to the obsolete 5KP7.5-B.

5KP7.5A (Littelfuse Inc., Cut Tape): Direct Littelfuse equivalent with identical P600 package. Voltage clamping of 12.9V represents a 4.8% reduction from the main part. Peak pulse current specification of 395.3A is provided. Active status ensures continued availability.

5KP7.5A-B (Littelfuse Inc., Bulk): Identical electrical characteristics to 5KP7.5A with bulk packaging. Suitable for high-volume procurement. Maintains P600 package compatibility.

5KP7.5A-TP (Micro Commercial Co, Cut Tape): Cross-manufacturer substitute with R-6 axial package. Voltage clamping of 12.9V matches 5KP7.5A. R-6 package dimensions differ from P600; verify mechanical fit in existing PCB layouts before implementation.

5KP7.5E3/TR13 (Microchip Technology, Tape & Reel): Alternative manufacturer option with P600 package compatibility. Voltage clamping of 14.3V represents a 5.5% increase from the main part. Peak pulse current of 350A is specified. Tape & Reel packaging supports automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can 5KP7.5A directly replace 5KP7.5-B in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (7.5V), peak pulse power (5000W), unidirectional channel configuration, through-hole mounting type, and operating temperature range. The voltage clamping difference (12.9V vs 14.65V) falls within acceptable tolerance for general-purpose transient suppression applications.

Q: What is the significance of the voltage clamping variation between substitute parts?

A: Voltage clamping at peak pulse current determines the maximum transient voltage the diode will allow across the protected circuit. The 5KP7.5A and 5KP7.5A-TP clamp at 12.9V, while 5KP7.5E3/TR13 clamps at 14.3V. Both remain within the functional range for 7.5V standoff protection. Circuit design margins should account for these variations.

Q: Why does 5KP7.5A-TP use an R-6 package instead of P600?

A: R-6 and P600 are both axial through-hole packages formats for similar component sizes. R-6 represents an alternative industry standard. Physical dimensions may differ; verify PCB pad spacing and lead length compatibility before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitutes maintain ROHS3 compliance, meeting environmental and regulatory requirements equivalent to the main part.

Q: What is the difference between Cut Tape, Bulk, and Tape & Reel packaging?

A: Cut Tape (CT) provides components on individual tape segments for manual or semi-automated assembly. Bulk packaging supplies loose components for high-volume manual assembly. Tape & Reel (TR) provides continuous reel format optimized for automated pick-and-place assembly equipment. Electrical performance is identical across all packaging formats.

Q: Can I use 5KP7.5E3/TR13 if my design requires the lowest clamping voltage?

A: No. The 5KP7.5E3/TR13 clamps at 14.3V, the highest among substitutes. For minimum clamping voltage, select 5KP7.5A or 5KP7.5A-TP, both at 12.9V.

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