ROV05-180M-S Equivalent & Substitute Parts

Part Overview

The ROV05-180M-S is an 18 V, 100 A Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc. in a through-hole disc 5mm package. This component is designed for transient voltage protection in electronic circuits with a rated energy capacity of 0.6 J and operating temperature range of -40°C to 85°C. The part is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

ROV05-180M-S

Littelfuse Inc.In Stock: 1100ROV05-180M-S Datasheet

Current PartRFQ

V18ZA05P

Littelfuse Inc.In Stock: 3549V18ZA05P Datasheet

MFR RecommendedRFQ

ERZ-V05D180

Panasonic Electronic ComponentsIn Stock: 15053ERZ-V05D180 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV05-180M-S is determined by the following critical parameters:

• Varistor Voltage (Typ): 18 V nominal rating
• Maximum DC Volts: 14 V maximum operating voltage
• Current - Surge: Minimum 100 A capacity
• Package / Case: Disc form factor with through-hole mounting
• Number of Circuits: Single circuit configuration
• RoHS Compliance: ROHS3 Compliant status

The substitute parts identified maintain the core electrical characteristics (18 V nominal varistor voltage, 14 V maximum DC rating, and single-circuit configuration) while offering improved availability through active product status. Package dimensions and mounting type remain consistent with the original specification.

Parameter Comparison

Engineering Selection Recommendations

V18ZA05P (Littelfuse Inc., Active Status)

The V18ZA05P is a direct functional equivalent with identical varistor voltage rating (18 V typ), maximum DC voltage (14 V), and surge current capacity (100 A). This part maintains the same 5mm disc package and through-hole mounting configuration. The narrower varistor voltage tolerance range (16.2 V to 19.8 V versus 14.4 V to 21.6 V) provides tighter voltage regulation. Extended operating temperature range (-55°C to 85°C) offers improved performance in cold environments. Active product status ensures ongoing availability and supply chain continuity. Lower energy rating (0.17 J versus 0.6 J) requires verification against circuit transient energy requirements.

ERZ-V05D180 (Panasonic Electronic Components, Active Status)

The ERZ-V05D180 provides equivalent varistor voltage (18 V typ) and maximum DC voltage (14 V) with enhanced surge current capacity (250 A versus 100 A). This part is suitable for applications requiring higher transient current handling. The 7mm disc package represents a physical size increase from the original 5mm specification, requiring PCB layout verification for mechanical fit. Energy rating (0.6 J) matches the original part. Active product status and ROHS3 compliance support long-term design continuity. Package dimension change necessitates confirmation of mounting hole compatibility and thermal management requirements.

Frequently Asked Questions (FAQ)

Q: Can V18ZA05P directly replace ROV05-180M-S without circuit modification?

A: V18ZA05P maintains identical electrical ratings (18 V typ, 14 V max DC, 100 A surge) and package form factor (5mm disc, through-hole). Direct substitution is supported from an electrical and mechanical standpoint. The lower energy rating (0.17 J) requires confirmation that circuit transient energy does not exceed this specification.

Q: What is the primary difference between V18ZA05P and ERZ-V05D180?

A: V18ZA05P maintains the original 5mm disc package and 100 A surge rating. ERZ-V05D180 increases to a 7mm disc package with 250 A surge capacity. The package size change requires PCB layout verification. Selection depends on available board space and transient current requirements.

Q: Is the 7mm package of ERZ-V05D180 compatible with 5mm mounting holes?

A: No. The 7mm disc package requires larger mounting holes than the original 5mm specification. PCB redesign or mechanical adapter solutions are necessary for physical installation.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. Both V18ZA05P and ERZ-V05D180 are ROHS3 Compliant, matching the original ROV05-180M-S specification.

Q: Which substitute part is recommended for new designs?

A: Selection between V18ZA05P and ERZ-V05D180 depends on specific application requirements. V18ZA05P is recommended when 5mm package constraints and 100 A surge capacity are required. ERZ-V05D180 is suitable when higher surge current capacity (250 A) and 7mm package dimensions are acceptable.