5KP48 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 5KP48 is a unidirectional Zener-type transient voltage suppressor manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole P600 axial package device provides 5000W peak pulse power dissipation with a 48V reverse standoff voltage rating. The 5KP48 is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	48	V
Voltage - Breakdown (Min)	50.49	V
Voltage - Clamping (Max) @ Ipp	81.27	V
Power - Peak Pulse	5000	W
Mounting Type	Through Hole	-
Package / Case	P600, Axial	-
Operating Temperature	-55 to 175	°C (TJ)
Type	Zener	-
Unidirectional Channels	1	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the 5KP48 is determined by the following critical parameters:

Electrical Compatibility Criteria:

Voltage - Reverse Standoff (Typ): 48V nominal
Voltage - Breakdown (Min): 50.49V minimum threshold
Voltage - Clamping (Max) @ Ipp: Must remain within acceptable transient suppression range (77.4V to 85.5V for P600 package variants)
Power - Peak Pulse: 5000W minimum for equivalent performance
Type: Zener unidirectional TVS diode
Unidirectional Channels: 1 channel

Mechanical Compatibility Criteria:

Mounting Type: Through Hole
Package / Case: P600 axial or compatible axial packages
Operating Temperature Range: -55°C to 175°C (TJ)

Compliance Criteria:

RoHS Status: ROHS3 Compliant
Product Status: Active (preferred for new designs and ongoing support)

Substitute parts are grouped into two categories: direct equivalents maintaining identical P600 package specifications, and alternative package solutions (DO-201, R-6) that provide equivalent electrical performance with different mechanical form factors.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Package / Case	Product Status	RoHS Status
5KP48	Littelfuse Inc.	48	50.49	81.27	-	5000	P600, Axial	Obsolete	ROHS3 Compliant
5KP48A	Littelfuse Inc.	48	53.3	77.4	65.9	5000	P600, Axial	Active	ROHS3 Compliant
5KP48AHE3/54	Vishay General Semiconductor - Diodes Division	48	53.3	77.4	64.6	5000	P600, Axial	Active	ROHS3 Compliant
5KP48E3/TR13	Microchip Technology	48	53.3	85.5	58.5	5000	P600, Axial	Active	ROHS3 Compliant
30KP48A-TP	Micro Commercial Co	48	53.6	81.6	-	30000	R-6, Axial	Active	ROHS3 Compliant
1.5KE47A	Taiwan Semiconductor Corporation	40.2	44.7	64.8	24	1500	DO-201AA, Axial	Active	ROHS3 Compliant
1.5KE51A	Meritek	-	48.5	70.1	21.7	1500	DO-201, Axial	Active	-
P6KE56A-TP	Micro Commercial Co	47.8	53.2	77	7.8	600	DO-15, Axial	Active	-
SA40A-TP	Micro Commercial Co	40	44.4	64.5	7.9	500	DO-15, Axial	Active	-

Engineering Selection Recommendations

Direct P600 Package Equivalents (Recommended for 5KP48 Replacement):

The 5KP48A, 5KP48AHE3/54, and 5KP48E3/TR13 maintain identical P600 axial package specifications and 5000W power ratings with 48V reverse standoff voltage. All three are active products with ROHS3 compliance. The 5KP48A and 5KP48AHE3/54 exhibit lower clamping voltages (77.4V) compared to the original 5KP48 (81.27V), providing enhanced transient suppression. The 5KP48E3/TR13 offers the highest clamping voltage (85.5V) within the P600 series. Selection between these three should be based on specific circuit clamping voltage requirements and packaging format availability (Cut Tape, standard, or Tape & Reel).

Higher Power Alternative (30KP48A-TP):

The 30KP48A-TP provides 30000W peak pulse power in an R-6 axial package with matching 48V reverse standoff voltage and comparable clamping characteristics (81.6V). This part is suitable for applications requiring enhanced transient energy absorption beyond the 5000W specification, though mechanical form factor differs from the original P600 package.

Lower Power Alternatives (1.5KE Series and P6KE Series):

The 1.5KE47A, 1.5KE51A, and P6KE56A-TP provide reduced power dissipation (1500W and 600W respectively) with different package forms (DO-201 and DO-15). These parts are applicable only in applications where peak pulse power requirements are lower than the original 5000W specification. The 1.5KE47A exhibits voltage ratings below the 48V nominal (40.2V standoff), making it unsuitable for direct replacement in 48V-rated circuits.

Compliance and Availability:

All recommended P600 equivalents maintain ROHS3 compliance and active product status, ensuring long-term availability and regulatory alignment. The 5KP48A offers the highest inventory availability (8800 pcs) among direct equivalents.

Frequently Asked Questions (FAQ)

Q: Can the 5KP48A directly replace the 5KP48 in existing designs?

A: Yes. The 5KP48A maintains identical P600 axial package specifications, 48V reverse standoff voltage, and 5000W peak pulse power rating. The lower clamping voltage (77.4V vs. 81.27V) provides improved transient suppression performance. Mechanical and electrical pin compatibility is maintained.

Q: What is the difference between the 5KP48A, 5KP48AHE3/54, and 5KP48E3/TR13?

A: All three maintain P600 package and 5000W power specifications with 48V reverse standoff voltage. Primary differences are clamping voltage (5KP48A and 5KP48AHE3/54 at 77.4V; 5KP48E3/TR13 at 85.5V) and packaging format (Cut Tape, standard, or Tape & Reel). Selection depends on circuit clamping requirements and procurement format preferences.

Q: Why are lower power alternatives (1.5KE and P6KE series) listed as substitutes?

A: These parts are listed based on provided manufacturer cross-reference data but are not recommended for direct replacement in applications requiring 5000W peak pulse power dissipation. They are applicable only in circuits with lower transient energy requirements.

Q: Is the 30KP48A-TP a suitable replacement for the 5KP48?

A: The 30KP48A-TP provides equivalent electrical performance with 48V reverse standoff voltage and comparable clamping characteristics. However, the R-6 axial package differs mechanically from the P600 package. This part is suitable only if the circuit board layout and mechanical constraints accommodate the different package form factor.

Q: What compliance certifications apply to substitute parts?

A: All recommended P600 equivalents (5KP48A, 5KP48AHE3/54, 5KP48E3/TR13) maintain ROHS3 compliance. The 5KP48AHE3/54 carries AEC-Q101 automotive qualification. Compliance documentation should be verified with the specific manufacturer for applications requiring additional certifications.

Q: How do I determine which substitute part is best for my application?

A: Verify three parameters: (1) Required reverse standoff voltage (48V for 5KP48 equivalents), (2) Maximum acceptable clamping voltage for your circuit protection scheme, and (3) Mechanical package compatibility with your PCB layout. All recommended P600 equivalents satisfy these criteria; selection is based on clamping voltage preference and packaging format availability.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message