20KPA72C Equivalent & Substitute Parts

Part Overview

The 20KPA72C is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose transient protection applications. This component features a 72V reverse standoff voltage with a maximum clamping voltage of 121.8V and peak pulse current handling of 174.1A. The product is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations where legacy compatibility is required.

Substiute Parts

20KPA72C

LittelfuseIn Stock: 67420KPA72C Datasheet

Current PartRFQ

20KPA72CA

MDE Semiconductor IncIn Stock: 204620KPA72CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 20KPA72C is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 72V
• Voltage - Clamping (Max) @ Ipp: Must not exceed 121.8V to ensure protection threshold compatibility
• Current - Peak Pulse (10/1000µs): 174.1A minimum
• Power - Peak Pulse: 20000W (20kW)
• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Bidirectional Channels: 1
• Type: Zener

The 20KPA72CA meets these substitution criteria while maintaining functional equivalence within the 20KPA series. Both components share identical reverse standoff voltage, peak pulse current, power dissipation capability, and thermal operating range. The substitute part is manufactured by MDE Semiconductor Inc and carries active product status with current inventory availability.

Parameter Comparison

Engineering Selection Recommendations

The 20KPA72CA is a direct functional substitute for the 20KPA72C. Both components maintain identical reverse standoff voltage (72V), peak pulse current (174.1A), and power dissipation (20kW) specifications. The 20KPA72CA exhibits a lower maximum clamping voltage (116V versus 121.8V), which provides improved transient suppression performance within the same voltage class.

The 20KPA72CA carries active product status with ROHS3 compliance and current manufacturing availability, eliminating obsolescence concerns associated with the original 20KPA72C. Both components are rated for identical operating temperature ranges (-55°C to 175°C) and utilize the same P600 axial through-hole package, ensuring direct mechanical and electrical compatibility in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the 20KPA72CA directly replace the 20KPA72C in existing designs?

A: Yes. Both components share identical reverse standoff voltage (72V), peak pulse current (174.1A), power dissipation (20kW), operating temperature range (-55°C to 175°C), and P600 axial through-hole package specifications. The 20KPA72CA is a direct substitute.

Q: What is the significance of the lower clamping voltage in the 20KPA72CA?

A: The 20KPA72CA exhibits a maximum clamping voltage of 116V compared to 121.8V in the 20KPA72C. This lower clamping voltage represents improved transient suppression performance, as the component clamps transient events to a lower peak voltage while maintaining the same current-handling capability.

Q: Why is the 20KPA72C listed as obsolete?

A: The 20KPA72C is classified as obsolete by Littelfuse. The 20KPA72CA, manufactured by MDE Semiconductor Inc, is an active product with current inventory availability and should be used for new designs and ongoing system support.

Q: Are there any compliance differences between these components?

A: Both the 20KPA72C and 20KPA72CA are ROHS3 compliant. The 20KPA72CA carries a Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

Q: What package type do these components use?

A: Both components use the P600 axial through-hole package, ensuring identical mechanical compatibility and PCB mounting procedures.