30KPA84 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 30KPA84 is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features an 84V reverse standoff voltage with a maximum clamping voltage of 146.16V at peak pulse current, housed in a P600 axial through-hole package. The 30KPA84 is classified as obsolete, making identification of functionally equivalent active alternatives essential for ongoing design support and procurement.

Substiute Parts

30KPA84

Littelfuse Inc.In Stock: 106530KPA84 Datasheet

Current PartRFQ

30KPA84A

MDE Semiconductor IncIn Stock: 197630KPA84A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 30KPA84 is determined by strict equivalence across the following critical electrical and mechanical parameters:

• Voltage Rating: Reverse standoff voltage of 84V and breakdown voltage minimum of 88.64V or higher
• Peak Pulse Current: 217.7A at 10/1000µs pulse duration
• Peak Pulse Power: 30000W (30kW) dissipation capability
• Package Compatibility: P600 axial through-hole form factor
• Device Type: Unidirectional Zener TVS diode with single channel
• Temperature Range: Operating range of -55°C to 175°C (TJ)

The 30KPA84A qualifies as a direct substitute based on matching all critical parameters within the allowed tolerance band for this product category.

Parameter Comparison

Engineering Selection Recommendations

The 30KPA84A (MDE Semiconductor Inc.) is the qualified substitute for the obsolete 30KPA84. Selection is based on the following engineering criteria:

• Product Status: The 30KPA84A maintains active product status, ensuring continued availability and manufacturing support, whereas the 30KPA84 is obsolete.
• Regulatory Compliance: Both components are ROHS3 compliant, meeting environmental and hazardous substance restrictions.
• Electrical Equivalence: The 30KPA84A maintains identical peak pulse current (217.7A) and power dissipation (30kW) ratings. The clamping voltage of 139.2V is lower than the original 146.16V, providing improved transient suppression performance. The breakdown voltage minimum of 93.8V is higher than the original 88.64V, remaining within acceptable tolerance for the 84V reverse standoff rating.
• Mechanical Compatibility: Identical P600 axial through-hole package ensures direct board-level substitution without layout modifications.
• Temperature Performance: Matching operating temperature range (-55°C to 175°C) ensures thermal compatibility in existing applications.

Frequently Asked Questions (FAQ)

Q: Can the 30KPA84A be used as a direct replacement for the 30KPA84 in existing designs?

A: Yes. The 30KPA84A is electrically and mechanically equivalent. Both components share identical reverse standoff voltage (84V), peak pulse current (217.7A), power dissipation (30kW), operating temperature range, and P600 axial through-hole package. No circuit modifications or board redesign are required.

Q: What is the significance of the lower clamping voltage in the 30KPA84A?

A: The 30KPA84A exhibits a maximum clamping voltage of 139.2V compared to 146.16V in the original 30KPA84. A lower clamping voltage indicates faster transient suppression and reduced voltage overshoot, which is beneficial for circuit protection. This difference remains within the acceptable parameter band for this product category.

Q: Are there compliance or certification differences between the two parts?

A: Both the 30KPA84 and 30KPA84A are ROHS3 compliant. The 30KPA84A includes additional REACH compliance information available upon request. Both components carry the same ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Q: Does the P600 axial package remain the same for both components?

A: Yes. Both components use the P600 axial through-hole package, ensuring identical footprint and mounting compatibility. No PCB modifications are necessary for substitution.

Q: Why is the 30KPA84 classified as obsolete?

A: The 30KPA84 is no longer in active production by Littelfuse Inc. The 30KPA84A represents the active equivalent in the 30KPA series, ensuring continued design support and component availability for new and legacy applications.