EPS48 Equivalent & Substitute Parts

Part Overview

The EPS48 is an active unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology. This through-hole component is designed for general-purpose transient voltage protection applications. The EPS48 features a 48V reverse standoff voltage with an 84.3V maximum clamping voltage and 11.2A peak pulse current capability. As an active product with established inventory availability, equivalent and substitute parts are identified to provide design flexibility, alternative sourcing options, and component availability assurance for production environments.

Substiute Parts

EPS48

Microchip TechnologyIn Stock: 755EPS48 Datasheet

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1.5KE56A

Taiwan Semiconductor CorporationIn Stock: 427641.5KE56A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EPS48 are identified based on the following critical electrical and mechanical parameters that determine functional equivalence:

Voltage Parameters: Reverse standoff voltage, breakdown voltage minimum, and maximum clamping voltage must fall within acceptable tolerance ranges for the application circuit. The EPS48 operates at 48V standoff with 84.3V clamping; substitute parts must maintain similar voltage protection characteristics.

Current and Power Ratings: Peak pulse current capability and peak pulse power dissipation define the transient energy handling capacity. The EPS48 handles 11.2A peak pulse current with 1000W peak pulse power.

Package and Mounting: Through-hole axial packages ensure mechanical compatibility with printed circuit board layouts designed for the EPS48 form factor.

Temperature Operating Range: The EPS48 operates across -65°C to 175°C junction temperature. Substitute parts must support equivalent or superior temperature ranges.

Product Status and Compliance: Active product status with REACH Unaffected and EAR99 classification ensures regulatory compliance and continued availability.

The 1.5KE56A from Taiwan Semiconductor Corporation qualifies as a substitute based on comparable voltage ratings, unidirectional channel configuration, through-hole axial mounting, and active product status.

Parameter Comparison

Engineering Selection Recommendations

EPS48 (Microchip Technology): Select this part for applications requiring the specific A-series axial package form factor and the extended lower temperature operating limit of -65°C. The EPS48 maintains active product status with established supply chain presence (722 pcs in stock).

1.5KE56A (Taiwan Semiconductor Corporation): This substitute provides superior peak pulse current handling (20A versus 11.2A) and increased peak pulse power dissipation (1500W versus 1000W). The 1.5KE56A is suitable for applications where higher transient energy absorption is required. The DO-201 package offers mechanical compatibility with axial through-hole layouts. The 1.5KE56A maintains active product status with ROHS3 compliance and extensive inventory availability (42,745 pcs in stock). The minimum operating temperature is -55°C, which is acceptable for most industrial and commercial applications.

Both parts carry REACH Unaffected and EAR99 classifications, ensuring equivalent regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the 1.5KE56A directly replace the EPS48 in existing circuit designs?

A: The 1.5KE56A is electrically compatible for applications where the EPS48 is specified. Both devices are unidirectional TVS diodes with comparable voltage ratings (48V standoff for EPS48 versus 47.8V for 1.5KE56A). The 1.5KE56A offers higher current and power ratings, making it suitable for circuits requiring enhanced transient protection. Package compatibility depends on PCB layout; the EPS48 uses A-series axial packaging while the 1.5KE56A uses DO-201 axial packaging. Both are through-hole axial formats and are mechanically interchangeable in most applications.

Q: What are the voltage rating differences between these parts?

A: The EPS48 has a 48V reverse standoff voltage with 84.3V maximum clamping voltage. The 1.5KE56A has a 47.8V reverse standoff voltage with 77V maximum clamping voltage. These differences are within typical manufacturing tolerances for TVS diodes. The 1.5KE56A provides lower clamping voltage, which may offer superior transient suppression in some circuit topologies.

Q: Are there temperature range limitations when substituting the 1.5KE56A for the EPS48?

A: The EPS48 operates from -65°C to 175°C junction temperature, while the 1.5KE56A operates from -55°C to 175°C. For applications requiring operation below -55°C, the EPS48 is the required choice. For standard industrial and commercial temperature ranges, the 1.5KE56A is fully compatible.

Q: How do the current ratings affect circuit performance?

A: The EPS48 handles 11.2A peak pulse current with 1000W peak pulse power. The 1.5KE56A handles 20A peak pulse current with 1500W peak pulse power. Higher current and power ratings in the 1.5KE56A provide greater transient energy absorption capacity. For circuits experiencing transient pulses exceeding the EPS48 specifications, the 1.5KE56A offers improved protection margin.

Q: Are both parts RoHS compliant?

A: The EPS48 carries REACH Unaffected status. The 1.5KE56A is ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). Both parts meet current regulatory requirements for electronic component manufacturing and distribution.

Q: What is the difference between A-series and DO-201 axial packages?

A: Both are through-hole axial package formats suitable for PCB mounting. The A-series (EPS48) and DO-201 (1.5KE56A) differ in physical dimensions and lead spacing. PCB layouts designed for one package format may require minor modifications to accommodate the other. Consult component datasheets for precise dimensional specifications before implementing package substitutions.