ROV20H470L-S Equivalent & Substitute Parts

Part Overview

The ROV20H470L-S is a 47 V, 3 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse in a through-hole disc 20mm package. This component is designed for single-circuit transient voltage suppression applications with a maximum energy rating of 34J and operating temperature range of -40°C to 125°C. The part is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

ROV20H470L-S

LittelfuseIn Stock: 888ROV20H470L-S Datasheet

Current PartRFQ

ERZ-V20D470

Panasonic Electronic ComponentsIn Stock: 1716ERZ-V20D470 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV20H470L-S is determined by the following critical electrical and mechanical parameters:

• Varistor voltage rating (47 V nominal, with acceptable tolerance range)
• Surge current capacity (3 kA minimum)
• Energy dissipation capability (34 J)
• Single-circuit configuration
• Through-hole mounting compatibility
• Maximum AC and DC voltage ratings (30 V AC / 38 V DC)
• RoHS3 compliance and REACH unaffected status

The ERZ-V20D470 from Panasonic Electronic Components meets these substitution criteria with equivalent electrical performance and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V20D470 is a direct functional equivalent for the obsolete ROV20H470L-S. Both components share identical electrical specifications for varistor voltage (47 V nominal), surge current capacity (3 kA), energy dissipation (34 J), and voltage ratings. Both maintain ROHS3 compliance and REACH unaffected status.

The ERZ-V20D470 is currently in active production status with 1637 units in stock, providing supply continuity for applications requiring this varistor specification. The minor package dimension difference (21.5mm versus 20mm disc) and reduced maximum operating temperature range (-40°C to 85°C versus -40°C to 125°C) must be evaluated against specific application requirements. The slightly higher capacitance value (13500 pF versus 12100 pF at 1 kHz) is within acceptable tolerance for most transient suppression applications.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V20D470 be used as a direct replacement for the ROV20H470L-S?

A: Yes, the ERZ-V20D470 meets all critical electrical substitution criteria: 47 V nominal varistor voltage, 3 kA surge current, 34 J energy rating, single-circuit configuration, and through-hole mounting. Both components are ROHS3 compliant and REACH unaffected.

Q: What is the significance of the package dimension difference (20mm versus 21.5mm)?

A: The 1.5mm increase in disc diameter must be verified against PCB layout constraints and mechanical clearance requirements in the target application. Through-hole mounting compatibility should be confirmed with board design specifications.

Q: Does the reduced operating temperature range of the ERZ-V20D470 affect substitution suitability?

A: The ERZ-V20D470 operates from -40°C to 85°C, compared to -40°C to 125°C for the ROV20H470L-S. Applications requiring operation above 85°C must retain the original specification or identify alternative parts with extended temperature ratings.

Q: Are there compliance differences between these components?

A: Both components are ROHS3 compliant, REACH unaffected, and share identical ECCN (EAR99) and HTSUS (8533.40.4000) classifications. No compliance barriers exist for substitution.

Q: What is the varistor voltage tolerance range for substitution?

A: The ROV20H470L-S has a varistor voltage range of 39.95 V to 54.05 V, while the ERZ-V20D470 ranges from 42 V to 52 V. The ERZ-V20D470 tolerance band is contained within the original specification, ensuring functional compatibility.