ROV20-680L-S Equivalent & Substitute Parts

Part Overview

The ROV20-680L-S is a 68V 2kA disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability. The part operates across a temperature range of -40°C to 125°C and is housed in a 20mm disc package.

Substiute Parts

ROV20-680L-S

Littelfuse Inc.In Stock: 887ROV20-680L-S Datasheet

Current PartRFQ

B72220S0400K101

EPCOS - TDK ElectronicsIn Stock: 12993B72220S0400K101 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV20-680L-S is determined by the following critical parameters:

• Varistor voltage rating (68V nominal)
• Surge current capacity (2 kA)
• Maximum AC and DC voltage ratings (40V AC / 56V DC)
• Through-hole mounting configuration
• Disc 20mm package form factor
• Single circuit configuration
• RoHS3 compliance

The B72220S0400K101 from EPCOS - TDK Electronics meets these core substitution criteria. Both parts share identical nominal varistor voltage, surge current rating, voltage limits, mounting type, and package specifications. Compliance certifications (RoHS3, REACH Unaffected, EAR99) are equivalent across both components.

Parameter Comparison

Engineering Selection Recommendations

The B72220S0400K101 is the designated manufacturer-recommended substitute for the ROV20-680L-S. Selection of this part is supported by:

• Active product status ensuring ongoing availability and supply chain support
• Identical nominal varistor voltage (68V) and surge current rating (2 kA)
• Matching maximum AC and DC voltage specifications
• Equivalent RoHS3 and REACH compliance certifications
• Identical through-hole mounting and 20mm disc package configuration

The B72220S0400K101 demonstrates higher energy absorption capacity (37J versus 24J) and lower capacitance at 1 kHz (6750 pF versus 9600 pF). The operating temperature range of the substitute extends to 105°C maximum, compared to 125°C for the original part. These parameter variations fall within acceptable substitution tolerances for equivalent varistor functionality.

Frequently Asked Questions (FAQ)

Q: Can the B72220S0400K101 directly replace the ROV20-680L-S in existing designs?

A: Yes. Both parts share identical nominal varistor voltage (68V), surge current capacity (2 kA), maximum voltage ratings (40V AC / 56V DC), mounting type (through-hole), and package form factor (20mm disc). Physical and electrical compatibility is established.

Q: What are the differences in varistor voltage tolerance between these parts?

A: The ROV20-680L-S has a varistor voltage range of 57.8V to 78.2V. The B72220S0400K101 has a range of 61.2V to 74.8V. Both maintain a 68V nominal rating. The substitute exhibits a tighter tolerance band.

Q: Does the lower operating temperature maximum of the B72220S0400K101 affect compatibility?

A: The substitute operates to 105°C maximum, while the original operates to 125°C. Application compatibility depends on the actual operating temperature requirements of the circuit. If sustained temperatures exceed 105°C are required, the original part specification must be maintained.

Q: How do the energy ratings differ, and does this matter for substitution?

A: The B72220S0400K101 has higher energy absorption (37J versus 24J). This represents improved transient suppression capability and does not create compatibility issues for applications designed around the original 24J specification.

Q: Are packaging and mounting considerations identical?

A: Yes. Both parts use through-hole mounting with a 20mm disc package configuration. No PCB layout or assembly process modifications are required.

Q: What compliance certifications apply to both parts?

A: Both the ROV20-680L-S and B72220S0400K101 are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8533.40.4000.