ROV20-101K Equivalent & Substitute Parts

Part Overview

The ROV20-101K is a 100V, 6.5kA varistor in a 20mm disc form factor manufactured by Littelfuse Inc. This component is classified as a Transient Voltage Suppressor (TVS) and is designed for single-circuit through-hole applications. The part is currently obsolete, making identification of suitable substitutes essential for ongoing maintenance, repair, and legacy system support. Active equivalent models provide continued availability while maintaining electrical and mechanical compatibility.

Substiute Parts

ROV20-101K

Littelfuse Inc.In Stock: 806ROV20-101K Datasheet

Current PartRFQ

V100ZA20P

Littelfuse Inc.In Stock: 1912V100ZA20P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV20-101K is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Varistor Voltage (Typical): 100 V
• Current - Surge: 6.5 kA
• Number of Circuits: 1
• Mounting Type: Through Hole
• Package / Case: Disc 20mm
• RoHS Compliance: ROHS3 Compliant

The V100ZA20P qualifies as a manufacturer-recommended substitute based on identical values across all critical parameters. Both components share the same voltage rating, surge current capacity, circuit configuration, and physical form factor. The substitute maintains through-hole mounting compatibility and disc 20mm packaging, ensuring direct mechanical fit in existing PCB designs.

Parameter Comparison

Engineering Selection Recommendations

The V100ZA20P is the manufacturer-recommended substitute for the obsolete ROV20-101K. Both components are manufactured by Littelfuse Inc. and maintain ROHS3 compliance. The substitute part is currently in active production status with confirmed inventory availability, whereas the original part is obsolete.

The V100ZA20P provides electrical equivalence across all critical parameters: identical varistor voltage rating (100V typical), surge current capacity (6.5kA), and circuit configuration (single circuit). Mechanical compatibility is assured through identical mounting type (through hole) and package form factor (disc 20mm).

The maximum DC voltage specification differs slightly between the two parts (85V for ROV20-101K versus 81V for V100ZA20P). This variance falls within the varistor voltage tolerance band (90V–110V) and does not affect functional substitution in applications designed for the original 100V rating.

Frequently Asked Questions (FAQ)

Q: Can the V100ZA20P directly replace the ROV20-101K in existing designs?

A: Yes. Both components share identical varistor voltage ratings (100V typical), surge current capacity (6.5kA), circuit count (1), and physical form factor (disc 20mm through hole). Direct mechanical and electrical substitution is supported.

Q: What is the difference in energy rating between the two parts?

A: The ROV20-101K is rated at 56J, while the V100ZA20P is rated at 30J. This parameter difference reflects manufacturing variations between the obsolete and active product lines but does not affect substitution eligibility, as both parts meet the electrical requirements defined by the critical parameters.

Q: Are there differences in operating temperature range?

A: Yes. The ROV20-101K operates from -40°C to 125°C, while the V100ZA20P operates from -55°C to 85°C. Application requirements should be evaluated against the specific operating temperature range of the substitute part.

Q: Does the capacitance difference affect substitution?

A: The ROV20-101K has 4000pF @ 1kHz capacitance, while the V100ZA20P has 6500pF @ 1MHz. These measurements are taken at different frequencies and reflect product line variations. Substitution is based on the critical electrical parameters (voltage, surge current) and mechanical compatibility, not capacitance specifications.

Q: Is the V100ZA20P available in the same packaging as the original part?

A: Both parts use disc 20mm through-hole packaging. The V100ZA20P is supplied in bulk packaging, whereas the original part packaging type is not specified. The physical form factor and mounting method are identical.