Equivalent & Substitute Parts for 1.5KE480 TVS Diode

Part Overview

The 1.5KE480 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 408V reverse standoff voltage, 690.9V maximum clamping voltage, and 1500W peak pulse power rating in a through-hole DO-201 package. The product is currently obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

1.5KE480

Littelfuse Inc.In Stock: 9201.5KE480 Datasheet

Current PartRFQ

1.5KE480A

SMC Diode SolutionsIn Stock: 33601.5KE480A Datasheet

DirectRFQ

1.5KE480A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 47361.5KE480A-E3/54 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1.5KE480 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 408V
• Voltage - Clamping (Max) @ Ipp: Maximum 690.9V
• Current - Peak Pulse (10/1000µs): Minimum 2.3A
• Power - Peak Pulse: 1500W (1.5kW)
• Mounting Type: Through Hole
• Package / Case: DO-201 series (DO-201AA, DO-201AD, DO-27)
• Type: Zener, Unidirectional (1 channel)
• RoHS Status: ROHS3 Compliant

Substitute parts must maintain compatibility across these electrical and mechanical specifications. The following parts meet these criteria:

1.5KE480A (SMC Diode Solutions) - Direct manufacturer equivalent with identical power rating and through-hole DO-201AD package configuration.

1.5KE480A-E3/54 (Vishay General Semiconductor - Diodes Division) - Manufacturer-recommended substitute with verified electrical parameters within acceptable tolerance ranges and active product status.

Parameter Comparison

Engineering Selection Recommendations

1.5KE480A-E3/54 (Vishay) is the preferred substitute for new designs and obsolescence mitigation. This part maintains the original reverse standoff voltage specification (408V), operates within the same temperature range (-55 to 175°C), and is available in the identical DO-201AA package configuration. The clamping voltage (658V) and peak pulse current (2.28A) remain within acceptable operational margins relative to the original specification. The part carries active product status with full ROHS3 compliance and REACH unaffected certification, ensuring long-term supply chain stability.

1.5KE480A (SMC Diode Solutions) serves as an alternative direct equivalent with confirmed 1500W power rating and through-hole DO-201AD package compatibility. This part is currently active and ROHS3 compliant. However, incomplete electrical parameter documentation in available datasheets requires verification against application-specific requirements before deployment in critical circuits.

Both substitutes are suitable for general-purpose overvoltage protection applications and maintain mechanical compatibility with existing through-hole PCB layouts designed for the 1.5KE480.

Frequently Asked Questions (FAQ)

Q: Can the 1.5KE480A-E3/54 directly replace the obsolete 1.5KE480 in existing designs?

A: Yes. Both parts share the same 408V reverse standoff voltage, 1500W power rating, and DO-201 through-hole package family. The clamping voltage differential (658V vs. 690.9V) and peak pulse current variance (2.28A vs. 2.3A) fall within acceptable engineering tolerances for general-purpose protection circuits. Physical footprint compatibility is confirmed for standard through-hole PCB layouts.

Q: What is the difference between DO-201AA and DO-201AD packages?

A: Both are axial through-hole packages within the DO-201 family. DO-201AA and DO-201AD are mechanically compatible variants used by different manufacturers. The 1.5KE480A-E3/54 is available in DO-201AA configuration, matching the original 1.5KE480 package specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both 1.5KE480A and 1.5KE480A-E3/54 carry ROHS3 compliance certification, meeting environmental and regulatory requirements equivalent to the original component.

Q: Why is the 1.5KE480A-E3/54 recommended over the 1.5KE480A?

A: The 1.5KE480A-E3/54 provides complete electrical parameter documentation with verified specifications matching the original design envelope. The 1.5KE480A lacks published breakdown voltage, clamping voltage, and peak pulse current data in standard references, requiring direct manufacturer consultation for circuit-critical applications.

Q: Can these parts be used interchangeably in the same circuit?

A: Yes, for general-purpose overvoltage protection applications. Both substitute parts maintain the critical electrical parameters (reverse standoff voltage, power rating) and mechanical compatibility (through-hole mounting, DO-201 package family) required for functional equivalence. Application-specific verification is recommended for circuits with tight voltage or current margin requirements.