20KPA112C-B Equivalent & Substitute Parts

Part Overview

The 20KPA112C-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This bidirectional zener diode operates with a reverse standoff voltage of 112V and provides peak pulse power dissipation of 20kW. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations where this protection topology is required.

Substiute Parts

20KPA112C-B

Littelfuse Inc.In Stock: 121820KPA112C-B Datasheet

Current PartRFQ

20KPA112CA

MDE Semiconductor IncIn Stock: 212520KPA112CA Datasheet

DirectRFQ

20KPA112CA-B

Littelfuse Inc.In Stock: 94920KPA112CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 20KPA112C-B are qualified based on the following critical electrical and mechanical parameters:

• Reverse Standoff Voltage: 112V (exact match required)
• Current - Peak Pulse (10/1000µs): 111A (exact match required)
• Power - Peak Pulse: 20000W (exact match required)
• Package / Case: P600, Axial (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 175°C (exact match required)
• Bidirectional Channels: 1 (exact match required)
• Type: Zener (exact match required)

The substitute parts identified below meet all these critical parameters. Variations in clamping voltage and breakdown voltage are within acceptable engineering tolerances for this product category and do not affect functional substitution capability.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are qualified replacements for the obsolete 20KPA112C-B based on matching critical electrical and mechanical parameters.

20KPA112CA (MDE Semiconductor Inc): This part carries Active product status and is ROHS3 compliant. It is available in bulk packaging with 2035 units in stock.

20KPA112CA-B (Littelfuse Inc.): This part carries Active product status and is ROHS3 compliant. It maintains the same manufacturer as the original part and is available in bulk packaging with 891 units in stock. This option provides continuity with the original manufacturer ecosystem.

Both parts satisfy identical electrical specifications and package requirements. Selection between them depends on supply chain availability, inventory requirements, and manufacturer preference.

Frequently Asked Questions (FAQ)

Q: Can 20KPA112CA and 20KPA112CA-B be used interchangeably with 20KPA112C-B?

A: Yes. Both substitute parts match the critical parameters of the original part: 112V reverse standoff voltage, 111A peak pulse current, 20kW peak pulse power, P600 axial package, and through-hole mounting. The differences in clamping voltage (182V vs. 191.1V) and breakdown voltage (125.1V vs. 118.22V) are within acceptable engineering tolerances for TVS diode substitution.

Q: What is the difference between 20KPA112CA and 20KPA112CA-B?

A: Both parts are electrically identical and use the same P600 axial package. The primary differences are manufacturer (MDE Semiconductor Inc. vs. Littelfuse Inc.) and inventory availability. 20KPA112CA-B maintains the original Littelfuse manufacturer designation.

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

A: All three parts are ROHS3 compliant. Both substitute parts carry Active product status, whereas the original 20KPA112C-B is obsolete. Both substitutes are suitable for applications requiring RoHS compliance.

Q: Can these parts be used in new designs?

A: Yes. Both 20KPA112CA and 20KPA112CA-B are Active products and are appropriate for new design implementations requiring 112V TVS protection with 20kW peak pulse power dissipation in through-hole P600 axial packages.

Q: What packaging options are available for the substitute parts?

A: Both substitute parts are supplied in bulk packaging. The original 20KPA112C-B packaging information was not specified in the available data.