1.5KE82-B Equivalent & Substitute Parts

Part Overview

The 1.5KE82-B is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 70.1V reverse standoff voltage, 118.65V maximum clamping voltage, and 1500W peak pulse power rating in a through-hole DO-201 package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

1.5KE82-B

Littelfuse Inc.In Stock: 12061.5KE82-B Datasheet

Current PartRFQ

1.5KE82A

Taiwan Semiconductor CorporationIn Stock: 3003481.5KE82A Datasheet

DirectRFQ

1.5KE82A-B

Littelfuse Inc.In Stock: 8361.5KE82A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1.5KE82-B is determined by strict alignment of the following electrical and mechanical parameters:

• Reverse standoff voltage: 70.1V (nominal)
• Breakdown voltage minimum: within acceptable tolerance range
• Clamping voltage maximum: must not exceed application limits
• Peak pulse current capability: minimum 14.6A
• Peak pulse power rating: 1500W
• Package type: DO-201 through-hole configuration
• Unidirectional channel configuration: single channel
• Temperature operating range: -55°C to 175°C

Substitute parts must maintain compatibility across all these parameters to ensure functional equivalence in circuit protection applications. The 1.5KE82A and 1.5KE82A-B meet these criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts—1.5KE82A and 1.5KE82A-B—are qualified replacements for the obsolete 1.5KE82-B based on electrical parameter alignment and regulatory compliance.

The 1.5KE82A-B is the primary recommendation for direct replacement. Manufactured by Littelfuse Inc., it maintains the original manufacturer lineage and is available in bulk packaging with 741 units in stock. This part exhibits identical reverse standoff voltage (70.1V), matching peak pulse current (14.6A), and equivalent power rating (1500W). The clamping voltage is reduced to 113V maximum, providing enhanced protection margin. Full ROHS3 compliance and REACH unaffected status confirm regulatory alignment.

The 1.5KE82A, manufactured by Taiwan Semiconductor Corporation, serves as an alternative substitute with active product status and significantly higher inventory availability (300,300 units). This part maintains the same reverse standoff voltage and operating temperature range. Peak pulse current capability is marginally higher at 13.9A, and clamping voltage is also 113V maximum. Tape & Reel packaging is standard for this variant. ROHS3 compliance and REACH unaffected status are confirmed.

Both substitutes maintain through-hole DO-201 package compatibility, identical temperature operating range (-55°C to 175°C), and equivalent regulatory certifications. Selection between these options depends on packaging requirements and supply chain preferences.

Frequently Asked Questions (FAQ)

Q: Can the 1.5KE82A and 1.5KE82A-B be used interchangeably with the 1.5KE82-B?

A: Yes. Both substitute parts maintain the critical electrical parameters required for functional equivalence: 70.1V reverse standoff voltage, 1500W peak pulse power rating, and through-hole DO-201 package configuration. The reduced clamping voltage (113V vs. 118.65V) in both substitutes provides improved transient suppression performance.

Q: What is the difference between the 1.5KE82A and 1.5KE82A-B?

A: The primary differences are manufacturer and packaging. The 1.5KE82A is supplied by Taiwan Semiconductor Corporation in Tape & Reel format with higher inventory availability. The 1.5KE82A-B is supplied by Littelfuse Inc. in bulk packaging. Both maintain identical electrical specifications and regulatory compliance.

Q: Are there any compatibility concerns with the DO-201 package?

A: No. All three parts—the main 1.5KE82-B and both substitutes—use the same DO-201AA through-hole axial package configuration. Direct mechanical and electrical substitution is supported without circuit board modifications.

Q: How do the clamping voltage differences affect circuit protection?

A: The substitute parts feature a maximum clamping voltage of 113V compared to the original 118.65V. This lower clamping voltage provides faster transient suppression and reduced voltage overshoot, which is beneficial for sensitive downstream components. Circuit designs must confirm that 113V clamping voltage remains within acceptable limits for protected circuitry.

Q: Are both substitutes RoHS and REACH compliant?

A: Yes. Both the 1.5KE82A and 1.5KE82A-B are ROHS3 compliant. The 1.5KE82A-B carries REACH unaffected status, and the 1.5KE82A is also REACH unaffected. Both meet current environmental and regulatory requirements.

Q: Which substitute should be selected for new designs?

A: For new designs, either substitute is acceptable based on electrical equivalence. The 1.5KE82A-B is recommended if manufacturer continuity with Littelfuse Inc. is preferred. The 1.5KE82A is recommended if higher inventory availability and Tape & Reel packaging are advantageous for production workflows.