30KPA58C-B Equivalent & Substitute Parts

Part Overview

The 30KPA58C-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage transient protection applications. This bidirectional zener diode operates with a 58V reverse standoff voltage and provides peak pulse power dissipation of 30kW. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

30KPA58C-B

Littelfuse Inc.In Stock: 69230KPA58C-B Datasheet

Current PartRFQ

30KPA58CA

MDE Semiconductor IncIn Stock: 457030KPA58CA Datasheet

DirectRFQ

30KPA58CA-B

Littelfuse Inc.In Stock: 85830KPA58CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 30KPA58C-B is determined by strict equivalence across the following critical parameters:

• Reverse standoff voltage: 58V (nominal)
• Peak pulse current capability: 327.9A
• Peak pulse power dissipation: 30kW
• Package type: P600, Axial (through-hole)
• Bidirectional channel configuration: 1 channel
• Operating temperature range: -55°C ~ 175°C (TJ)
• Diode type: Zener

The identified substitute parts maintain these core electrical and mechanical specifications. Variations in voltage breakdown minimum and clamping voltage maximum are within the acceptable tolerance range for this product category and do not preclude functional substitution in the intended application.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts—30KPA58CA and 30KPA58CA-B—are classified as active products, ensuring continued availability and manufacturing support. The 30KPA58CA-B, manufactured by Littelfuse Inc., maintains the original manufacturer lineage and is recommended as the primary substitute for direct replacement in existing designs. The 30KPA58CA, supplied by MDE Semiconductor Inc., provides an alternative source with equivalent electrical performance and active product status.

All three parts maintain ROHS3 compliance and identical export classification (EAR99), supporting regulatory and supply chain continuity. The substitute parts exhibit lower maximum clamping voltage (92.4V versus 97.02V), which represents improved performance characteristics within the specified operating envelope.

Frequently Asked Questions (FAQ)

Q: Can 30KPA58CA and 30KPA58CA-B be used interchangeably with 30KPA58C-B?

A: Yes. Both substitute parts maintain identical reverse standoff voltage (58V), peak pulse current (327.9A), peak pulse power (30kW), and package configuration (P600, Axial, through-hole). The electrical parameter variations fall within acceptable tolerance ranges for this TVS diode category.

Q: What is the significance of the lower clamping voltage in the substitute parts?

A: The substitute parts exhibit a maximum clamping voltage of 92.4V compared to 97.02V in the original part. This represents improved transient suppression performance, as lower clamping voltage provides more effective voltage limiting during transient events while maintaining the same peak pulse current and power dissipation capabilities.

Q: Are there packaging differences between the substitute parts?

A: The 30KPA58C-B is supplied in standard packaging, while 30KPA58CA is supplied in bulk packaging and 30KPA58CA-B in bulk packaging. All three parts use identical P600 axial through-hole package configuration, ensuring mechanical and electrical compatibility in PCB applications.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant and classified under identical ECCN (EAR99) and HTSUS (8541.10.0080) codes, ensuring regulatory equivalence for procurement and export purposes.

Q: Why is the 30KPA58C-B classified as obsolete?

A: The 30KPA58C-B is an older product line. The active substitute parts (30KPA58CA and 30KPA58CA-B) represent current manufacturing offerings with equivalent or improved electrical characteristics and assured long-term availability.