5KP48A-B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 5KP48A-B is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This through-hole component operates across a temperature range of -55°C to 175°C and is RoHS3 compliant. The part is currently active in production with 1059 units in stock. Equivalent and substitute parts are identified based on matching electrical performance parameters, thermal operating range, compliance certifications, and compatible through-hole mounting configurations.

Substiute Parts

5KP48A-B

LittelfuseIn Stock: 10695KP48A-B Datasheet

Current PartRFQ

1.5KE47A

Taiwan Semiconductor CorporationIn Stock: 368961.5KE47A Datasheet

MFR RecommendedRFQ

1.5KE51A

MeritekIn Stock: 15511.5KE51A Datasheet

MFR RecommendedRFQ

5KP48A

Littelfuse Inc.In Stock: 88785KP48A Datasheet

MFR RecommendedRFQ

P6KE51A

Fairchild SemiconductorIn Stock: 18607P6KE51A Datasheet

MFR RecommendedRFQ

P6KE51A

Fairchild SemiconductorIn Stock: 18607P6KE51A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5KP48A-B are identified based on the following critical parameters:

• Unidirectional Zener Type: All substitutes must be unidirectional Zener-type TVS diodes
• Voltage Rating Range: Reverse standoff voltage and breakdown voltage must fall within acceptable operating margins for the application
• Clamping Voltage: Maximum clamping voltage at peak pulse current determines transient suppression effectiveness
• Peak Pulse Power Handling: Power dissipation capability during transient events
• Operating Temperature Range: Must support -55°C to 175°C minimum
• Through-Hole Mounting: All substitutes use through-hole axial package configurations
• Compliance: RoHS3 compliance and active product status required

The 5KP48A-B operates at 48V reverse standoff with 77.4V maximum clamping voltage and 5000W peak pulse power. Substitute parts are grouped by their ability to meet these electrical specifications within the defined thermal and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Packaging Variant)

The 5KP48A is the direct equivalent to 5KP48A-B, differing only in packaging format (Cut Tape versus Bulk). Both parts are manufactured by Littelfuse, share identical electrical specifications (48V reverse standoff, 77.4V clamping voltage, 65.9A peak pulse current, 5000W power rating), operate across -55°C to 175°C, use P600 axial through-hole packages, and maintain ROHS3 compliance. Selection between these two depends on procurement and assembly requirements rather than electrical performance.

Lower Power Alternatives

The 1.5KE47A and 1.5KE51A are lower-power TVS diodes rated at 1500W peak pulse power, compared to the 5KP48A-B's 5000W rating. These parts operate within the same -55°C to 175°C temperature range and use compatible through-hole axial packages (DO-201). The 1.5KE47A provides 40.2V reverse standoff with 64.8V clamping voltage and 24A peak pulse current. The 1.5KE51A provides 48.5V breakdown voltage with 70.1V clamping voltage and 21.7A peak pulse current. Both maintain RoHS3 compliance and active product status. These substitutes are suitable for applications where peak pulse power requirements do not exceed 1500W.

Limited Data Availability

The P6KE51A is listed as an active substitute but lacks complete electrical parameter documentation in the provided data. This part cannot be fully evaluated against the 5KP48A-B specifications without additional technical information.

Frequently Asked Questions (FAQ)

Q: Can the 5KP48A replace the 5KP48A-B?

A: Yes. Both parts are manufactured by Littelfuse with identical electrical specifications, operating temperature range, and through-hole P600 axial package. The difference is packaging format: 5KP48A is supplied in Cut Tape, while 5KP48A-B is supplied in Bulk. Selection depends on procurement and assembly workflow requirements.

Q: Are the 1.5KE47A and 1.5KE51A suitable replacements for the 5KP48A-B?

A: These parts are lower-power alternatives rated at 1500W versus the 5KP48A-B's 5000W. They operate within the same temperature range and use compatible through-hole axial packages. Substitution is valid only if the application's peak pulse power requirement does not exceed 1500W. Verify that the lower peak pulse current (24A for 1.5KE47A, 21.7A for 1.5KE51A) meets circuit protection requirements.

Q: What are the key differences between the 1.5KE47A and 1.5KE51A?

A: The 1.5KE47A provides 40.2V reverse standoff with 64.8V clamping voltage and 24A peak pulse current. The 1.5KE51A provides 48.5V breakdown voltage with 70.1V clamping voltage and 21.7A peak pulse current. Both are rated at 1500W peak pulse power and operate across -55°C to 175°C. Selection depends on the specific voltage protection requirements of the application.

Q: Are all substitute parts RoHS3 compliant?

A: The 5KP48A and 1.5KE47A are confirmed RoHS3 compliant. The 1.5KE51A and P6KE51A do not have RoHS3 compliance explicitly documented in the provided data. Verify compliance status with the manufacturer or supplier before final selection if RoHS3 certification is a requirement.

Q: Can the P6KE51A be used as a substitute?

A: The P6KE51A is listed as an active product but lacks complete electrical parameter specifications in the available data. Direct comparison with the 5KP48A-B cannot be performed without voltage rating, clamping voltage, peak pulse current, and power dissipation information. Contact the manufacturer or supplier for complete technical specifications before considering this part for substitution.

Q: What package types are used by these TVS diodes?

A: The 5KP48A-B and 5KP48A use P600 axial through-hole packages. The 1.5KE47A uses DO-201AA, DO-27, or axial packages. The 1.5KE51A uses DO-201 axial packages. All are through-hole components suitable for PCB mounting. Verify PCB footprint compatibility before substitution.