5KP48C-B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 5KP48C-B is a bidirectional Zener transient voltage suppressor diode manufactured by Littelfuse Inc., rated for 48V reverse standoff voltage with 5000W peak pulse power handling. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements. The part is housed in a P600 axial through-hole package and is ROHS3 compliant.

Key Parameters

Parameter	Value
Manufacturer Part Number	5KP48C-B
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	48V
Voltage - Breakdown (Min)	50.49V
Voltage - Clamping (Max) @ Ipp	81.27V
Power - Peak Pulse	5000W (5kW)
Mounting Type	Through Hole
Package / Case	P600, Axial
Operating Temperature	-55°C ~ 175°C (TJ)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 5KP48C-B is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 48V nominal rating
Voltage - Clamping (Max) @ Ipp: Maximum 81.27V
Power - Peak Pulse: 5000W (5kW) minimum
Bidirectional Channels: 1 channel
Mounting Type: Through Hole
Package / Case: P600 axial preferred; alternative packages acceptable if electrical performance maintained

Substitute parts are grouped into two categories:

Direct Package Equivalents (P600 Axial): Parts maintaining identical P600 axial packaging with matching or superior electrical specifications.

Functional Equivalents (Alternative Packages): Parts with equivalent or superior electrical performance in alternative through-hole packages (DO-201, DO-15, R-6) suitable for circuit redesign scenarios.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Power - Peak Pulse	Package / Case	Product Status
5KP48C-B	Littelfuse Inc.	48V	50.49V	81.27V	5000W	P600, Axial	Obsolete
5KP48CA	Diotec Semiconductor	48V	53.3V	77.4V	5000W	P600, Axial	Active
5KP48CA-B	Littelfuse Inc.	48V	53.3V	77.4V	5000W	P600, Axial	Active
1.5KE47CA	Diotec Semiconductor	40.2V	44.7V	64.8V	1500W	DO-201AA, Axial	Active
1.5KE51CA	Taiwan Semiconductor Corporation	43.6V	48.5V	70.1V	1500W	DO-201AA, Axial	Active
1.5KE56CA	Taiwan Semiconductor Corporation	47.8V	53.2V	77V	1500W	DO-201AA, Axial	Active
P6KE47CA	Diotec Semiconductor	40.2V	44.7V	64.8V	600W	DO-204AC, Axial	Active
P6KE51CA	Taiwan Semiconductor Corporation	43.6V	48.5V	70.1V	600W	DO-204AC, Axial	Active
SA48CA	Taiwan Semiconductor Corporation	48V	53.3V	77.4V	500W	DO-204AC, Axial	Active
1N6124	Semtech Corporation	42.6V	50.4V	80.7V	500W	Axial	Discontinued
30KP48CA-TP	Micro Commercial Co	48V	53.6V	81.6V	30000W	R-6, Axial	Active

Engineering Selection Recommendations

Primary Substitutes (Direct P600 Package Equivalents):

5KP48CA (Diotec Semiconductor) and 5KP48CA-B (Littelfuse Inc.) are the preferred direct substitutes. Both maintain the P600 axial package, 48V reverse standoff voltage, and 5000W peak pulse power rating. Both parts are active products with ROHS3 compliance. The 5KP48CA-B offers continuity with the original Littelfuse manufacturer lineage.

Secondary Substitutes (Functional Equivalents with Package Redesign):

For applications permitting package redesign, the following active parts provide equivalent or superior voltage clamping performance:

1.5KE56CA (Taiwan Semiconductor Corporation): Matches 48V standoff voltage range (47.8V typical) with 77V clamping voltage. Requires circuit board layout modification for DO-201 package. Power rating reduced to 1500W.
SA48CA (Taiwan Semiconductor Corporation): Maintains exact 48V standoff voltage with 77.4V clamping voltage in DO-204AC (DO-15) package. Suitable for lower power applications (500W peak pulse). Highest inventory availability (300,400 pcs).
30KP48CA-TP (Micro Commercial Co): Provides superior power handling (30kW peak pulse) with matching 48V standoff voltage and 81.6V clamping voltage in R-6 package. Appropriate for high-energy transient suppression applications.

Not Recommended:

1N6124 (Semtech Corporation) is discontinued at DiGi Electronics and should not be selected for new designs despite matching voltage characteristics.

Frequently Asked Questions (FAQ)

Q: Can 5KP48CA directly replace 5KP48C-B without circuit modification?

A: Yes. Both parts share identical P600 axial through-hole packaging, 48V reverse standoff voltage, and 5000W peak pulse power rating. No circuit board layout changes are required. Electrical performance is equivalent within specified parameter tolerances.

Q: What is the primary difference between 5KP48CA and 5KP48CA-B?

A: Both are functionally equivalent. 5KP48CA is manufactured by Diotec Semiconductor and supplied in Tape & Reel packaging. 5KP48CA-B is manufactured by Littelfuse Inc. and supplied in Bulk packaging. Selection depends on packaging format requirements and supplier availability.

Q: Why do substitute parts show lower power ratings (1500W, 600W, 500W)?

A: Lower power-rated parts are functional substitutes only when circuit transient energy requirements are reduced or when package redesign is acceptable. The 5KP series (5000W) is optimized for high-energy transient suppression. Lower-power alternatives (1.5KE, P6KE, SA series) are suitable for applications with reduced peak pulse energy demands.

Q: Is the 30KP48CA-TP suitable as a direct replacement?

A: No. The 30KP48CA-TP uses an R-6 package instead of P600, requiring circuit board redesign. However, it provides superior power handling (30kW) and is recommended for applications requiring enhanced transient suppression capability beyond the original 5kW specification.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed are ROHS3 compliant. The discontinued 1N6124 should not be used in new designs.

Q: What is the operating temperature range for substitute parts?

A: Most active substitutes operate across -55°C to 175°C (TJ), matching the original 5KP48C-B specification. Verify specific datasheets for individual part operating temperature ranges.

Q: Can SA48CA replace 5KP48C-B in all applications?

A: SA48CA maintains matching 48V standoff voltage and 77.4V clamping voltage but provides only 500W peak pulse power versus the original 5000W. Selection is appropriate only for applications with reduced transient energy requirements. The DO-204AC (DO-15) package requires circuit board layout modification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message