Equivalent & Substitute Parts for 30KPA33C TVS Diode

Part Overview

The 30KPA33C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage protection applications. This bidirectional Zener diode features a 33V reverse standoff voltage and 61.43V maximum clamping voltage with 517.9A peak pulse current capability. The part is currently obsolete, necessitating identification of active substitute components that maintain equivalent electrical and mechanical performance characteristics.

Substiute Parts

30KPA33C

Littelfuse Inc.In Stock: 100530KPA33C Datasheet

Current PartRFQ

30KPA33CA

MDE Semiconductor IncIn Stock: 232430KPA33CA Datasheet

DirectRFQ

5KP33CA-TP

Micro Commercial CoIn Stock: 168145KP33CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 30KPA33C is determined by the following critical parameters:

• Reverse standoff voltage of 33V (±tolerance)
• Bidirectional Zener diode configuration with single channel
• Through-hole axial mounting
• Operating temperature range of -55°C to 175°C
• ROHS3 compliance

The substitute parts identified maintain these core electrical and mechanical specifications, ensuring functional compatibility in the original application circuit.

Parameter Comparison

Engineering Selection Recommendations

30KPA33CA is the primary substitute for the obsolete 30KPA33C. Both parts share identical reverse standoff voltage, peak pulse power rating, and package specifications. The 30KPA33CA maintains active product status with MDE Semiconductor Inc and carries ROHS3 compliance. Clamping voltage differential of 2.93V and peak pulse current variance of 0.7A fall within acceptable engineering tolerances for general-purpose TVS applications.

5KP33CA-TP serves as an alternative substitute when 30KPA33CA availability is constrained. This part maintains the 33V reverse standoff voltage and identical operating temperature range. The package differs (R-6 versus P600), requiring mechanical board layout verification. Peak pulse power rating of 5kW represents a significant reduction from the original 30kW specification and should be evaluated against circuit transient energy requirements. This part is suitable only for applications with lower energy transient profiles.

Frequently Asked Questions (FAQ)

Q: Can 30KPA33CA directly replace 30KPA33C without circuit modification?

A: Yes. Both parts share identical reverse standoff voltage (33V), bidirectional Zener configuration, through-hole P600 axial package, and operating temperature range (-55°C to 175°C). Clamping voltage and peak pulse current parameters are within acceptable engineering variance for general-purpose protection circuits.

Q: What are the limitations of 5KP33CA-TP as a substitute?

A: The 5KP33CA-TP differs in two critical aspects: package type (R-6 versus P600 axial) and peak pulse power rating (5kW versus 30kW). The package change requires board layout modification. The reduced power rating restricts application to circuits with lower transient energy levels. Use this substitute only when circuit transient energy does not exceed 5kW.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both 30KPA33CA and 5KP33CA-TP carry ROHS3 compliance certification, matching the original 30KPA33C specification.

Q: Does package type affect electrical performance?

A: Package type (P600 versus R-6) affects mechanical mounting and thermal characteristics but does not alter the core electrical parameters (voltage ratings, current capacity). Package selection depends on board layout constraints and thermal management requirements of the application.

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

A: Clamping voltage determines the maximum voltage spike that reaches the protected circuit. The 30KPA33CA clamps at 58.5V versus the original 61.43V, providing slightly better protection. The 5KP33CA-TP clamps at 53.3V, offering enhanced protection but only within its 5kW power limitation.