30KPA170 Equivalent & Substitute Parts

Part Overview

The 30KPA170 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features a 170V reverse standoff voltage rating and provides peak pulse power dissipation of 30kW. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations. The 30KPA170A represents an active production alternative that maintains electrical and mechanical compatibility with the original specification.

Substiute Parts

30KPA170

Littelfuse Inc.In Stock: 111830KPA170 Datasheet

Current PartRFQ

30KPA170A

MDE Semiconductor IncIn Stock: 217630KPA170A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 30KPA170 is determined by strict equivalence across the following critical parameters:

• Reverse standoff voltage: 170V (nominal)
• Peak pulse current rating: 110.2A
• Peak pulse power dissipation: 30kW
• Package type: P600, Axial through-hole configuration
• Unidirectional topology: Single channel Zener TVS diode
• Operating temperature range: -55°C to 175°C (TJ)
• RoHS3 compliance status

The 30KPA170A qualifies as a direct substitute based on matching all critical electrical parameters and mechanical form factor. Variations in clamping voltage (288.75V vs. 275V) and breakdown voltage (179.46V vs. 189.9V) remain within acceptable tolerance bands for general-purpose transient suppression applications and do not preclude functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The 30KPA170A is the qualified substitute for the obsolete 30KPA170. Selection is based on the following engineering criteria:

• Both components maintain identical reverse standoff voltage (170V) and peak pulse current rating (110.2A), ensuring functional equivalence in transient suppression circuits.
• The 30KPA170A is in active production status, providing supply chain continuity and long-term availability compared to the obsolete 30KPA170.
• Both parts are ROHS3 compliant and carry identical ECCN and HTSUS classifications, satisfying regulatory and trade compliance requirements.
• Mechanical compatibility is confirmed through identical P600 axial through-hole packaging, enabling direct board-level substitution without layout modifications.
• The 30KPA170A carries MSL 1 (Unlimited) moisture sensitivity rating, providing superior handling flexibility compared to the original part specification.

Frequently Asked Questions (FAQ)

Q: Can the 30KPA170A be used as a direct replacement for the 30KPA170 in existing designs?

A: Yes. The 30KPA170A is a direct substitute. Both components share identical reverse standoff voltage (170V), peak pulse current (110.2A), power dissipation (30kW), and P600 axial through-hole package configuration. No circuit modifications or board redesign is required.

Q: What is the significance of the clamping voltage difference (288.75V vs. 275V)?

A: The clamping voltage variation falls within acceptable tolerance for general-purpose transient suppression. Both values remain within the specified operating envelope for the 170V standoff class. The lower clamping voltage of the 30KPA170A provides marginally improved transient energy absorption characteristics.

Q: Why is the 30KPA170 classified as obsolete?

A: Obsolescence reflects the manufacturer's discontinuation of the part. The 30KPA170A represents the active production continuation of this product line, maintaining full electrical and mechanical compatibility while ensuring ongoing supply availability.

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

A: Both components are ROHS3 compliant and carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications. The 30KPA170A provides enhanced moisture sensitivity documentation (MSL 1 Unlimited) and REACH compliance information availability.

Q: What is the operating temperature range for both components?

A: Both the 30KPA170 and 30KPA170A operate across the identical temperature range of -55°C to 175°C (junction temperature), ensuring thermal compatibility in all specified application environments.

Q: Can the 30KPA170A be used in new designs?

A: Yes. The 30KPA170A is in active production status and is the recommended choice for new designs requiring 170V standoff TVS diode protection. Its active status ensures long-term supply chain stability and technical support availability.