20KPA34C Equivalent & Substitute Parts

Part Overview

The 20KPA34C is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This through-hole component features a 34V reverse standoff voltage and 60.38V maximum clamping voltage with 351.3A peak pulse current capability. 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

20KPA34C

Littelfuse Inc.In Stock: 75820KPA34C Datasheet

Current PartRFQ

20KPA34CA

MDE Semiconductor IncIn Stock: 197420KPA34CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 20KPA34C is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Reverse standoff voltage: 34V (Typ)
• Peak pulse current capability: 351.3A at 10/1000µs pulse
• Peak pulse power dissipation: 20000W (20kW)
• Operating temperature range: -55°C to 175°C (TJ)
• Bidirectional channels: 1
• Type classification: Zener diode

Mechanical Equivalence Criteria:

• Mounting type: Through Hole
• Package designation: P600, Axial
• Supplier device package: P600

The 20KPA34CA qualifies as a direct substitute based on matching all critical electrical parameters (34V standoff, 351.3A peak pulse current, 20kW peak power) and identical mechanical specifications (P600 axial through-hole package). Variations in clamping voltage (57.5V vs. 60.38V) and breakdown voltage minimum (38V vs. 35.91V) remain within acceptable tolerance ranges for general-purpose TVS applications where the primary function is transient suppression at the specified voltage class.

Parameter Comparison

Engineering Selection Recommendations

The 20KPA34CA is the designated substitute for the obsolete 20KPA34C. Selection is based on the following engineering criteria:

Product Status: The 20KPA34CA maintains active product status with MDE Semiconductor Inc., ensuring ongoing availability and supply chain continuity. The original 20KPA34C is obsolete, necessitating transition to an active equivalent.

Compliance & Certifications: Both components maintain ROHS3 compliance. The 20KPA34CA includes REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity rating, providing additional regulatory documentation for applications requiring comprehensive compliance tracking.

Electrical Performance: The 20KPA34CA delivers equivalent performance across all critical transient suppression parameters: identical 34V reverse standoff voltage, matching 351.3A peak pulse current, and equivalent 20kW peak pulse power dissipation. The clamping voltage differential (57.5V vs. 60.38V) represents a 4.7% reduction, which remains within acceptable operational margins for general-purpose TVS applications.

Mechanical Compatibility: Identical P600 axial through-hole packaging ensures direct mechanical substitution without circuit board redesign or component placement modifications.

Frequently Asked Questions (FAQ)

Q: Can the 20KPA34CA be used as a direct replacement for the 20KPA34C in existing designs?

A: Yes. The 20KPA34CA is electrically and mechanically equivalent. Both components share identical reverse standoff voltage (34V), peak pulse current (351.3A), peak pulse power (20kW), operating temperature range (-55°C to 175°C), and P600 axial through-hole package specifications. Direct substitution is possible without circuit modifications.

Q: What is the significance of the clamping voltage difference between the two parts?

A: The 20KPA34C specifies 60.38V maximum clamping voltage, while the 20KPA34CA specifies 57.5V. This 2.88V difference represents a 4.7% reduction in clamping voltage. For general-purpose transient suppression applications, this variation remains within acceptable tolerance ranges and does not compromise the component's ability to protect circuits at the 34V voltage class.

Q: Are there any compliance or regulatory differences between these components?

A: Both components are ROHS3 compliant. The 20KPA34CA provides additional documentation including REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity rating. These certifications support applications requiring comprehensive regulatory compliance tracking but do not affect functional equivalence.

Q: What packaging format do these components use?

A: Both the 20KPA34C and 20KPA34CA use P600 axial through-hole packaging. This identical package specification ensures mechanical compatibility and allows direct board-level substitution without placement or routing modifications.

Q: Why is the 20KPA34C classified as obsolete?

A: The 20KPA34C is listed as obsolete by Littelfuse Inc. The 20KPA34CA, manufactured by MDE Semiconductor Inc., maintains active product status and serves as the current production equivalent for this voltage class and performance specification within the 20KPA series.