ROV14H151K-S Equivalent & Substitute Parts

Part Overview

The ROV14H151K-S is a 150 V, 6 kA transient voltage suppressor varistor manufactured by Littelfuse Inc. in a through-hole disc package (14mm). This component is designed for single-circuit transient voltage suppression applications with an operating temperature range of -40°C to 125°C.

The ROV14H151K-S has reached obsolete product status. Identifying qualified substitute parts ensures design continuity and maintains supply chain reliability for applications requiring equivalent transient voltage suppression performance.

Substiute Parts

ROV14H151K-S

Littelfuse Inc.In Stock: 955ROV14H151K-S Datasheet

Current PartRFQ

ERZ-V14D151

Panasonic Electronic ComponentsIn Stock: 3200ERZ-V14D151 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV14H151K-S is determined by the following critical parameters:

• Varistor voltage rating (135 V minimum, 150 V typical, 165 V maximum)
• Surge current capacity (6 kA)
• Energy absorption (53 J)
• Maximum AC and DC voltage ratings (95 V AC, 125 V DC)
• Single-circuit configuration
• Through-hole mounting type
• RoHS3 compliance

The ERZ-V14D151 from Panasonic Electronic Components meets these electrical specifications. Physical package dimensions differ slightly (15.5mm vs. 14mm disc), which must be evaluated for PCB layout compatibility. The operating temperature range of the substitute extends to 85°C maximum, which is lower than the original part's 125°C maximum.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V14D151 is a qualified substitute for the ROV14H151K-S based on electrical parameter equivalence and active product status. Both components are ROHS3 compliant and REACH unaffected, meeting regulatory requirements.

Design considerations for substitution:

• Electrical performance is equivalent across all critical transient suppression parameters (voltage rating, surge current, energy absorption).
• Physical package dimensions differ (15.5mm vs. 14mm). PCB layout must accommodate the larger disc diameter.
• Operating temperature maximum is reduced from 125°C to 85°C. Applications operating above 85°C ambient require thermal analysis to confirm suitability.
• Capacitance differs (2200 pF vs. 1510 pF at 1 kHz). High-frequency circuit performance must be evaluated if capacitive loading is a design constraint.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V14D151 be used as a direct replacement for the ROV14H151K-S?

A: The ERZ-V14D151 provides electrical equivalence for transient voltage suppression. Physical package dimensions differ (15.5mm vs. 14mm disc), requiring PCB layout verification. Operating temperature maximum is 85°C versus 125°C for the original part.

Q: What are the key electrical parameters that define substitution compatibility?

A: Varistor voltage rating (150 V typical), surge current capacity (6 kA), energy absorption (53 J), maximum AC/DC voltage ratings (95 V AC, 125 V DC), and single-circuit configuration must match or exceed the original specification.

Q: Does the higher capacitance of the ERZ-V14D151 affect circuit performance?

A: The ERZ-V14D151 has 2200 pF capacitance versus 1510 pF for the ROV14H151K-S at 1 kHz. Applications sensitive to capacitive loading or operating at high frequencies require circuit analysis to confirm compatibility.

Q: Are both parts compliant with environmental regulations?

A: Both the ROV14H151K-S and ERZ-V14D151 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the impact of the reduced operating temperature range?

A: The ERZ-V14D151 operates to 85°C maximum ambient temperature, compared to 125°C for the original part. Applications with sustained operation above 85°C require thermal analysis to confirm the substitute remains within safe operating limits.