OT20 Equivalent & Substitute Parts

Part Overview

The OT20 is a Class K5 general-purpose fuse manufactured by Mersen USA Newburyport-MA L.L.C., currently in active product status with ROHS3 compliance. This component is supplied in box packaging with 1027 units available in new original stock. Identifying equivalent substitute parts becomes necessary when addressing supply chain constraints, regional availability, or specific procurement requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

OT20

Mersen USA Newburyport-MA L.L.C.In Stock: 1055OT20 Datasheet

Current PartRFQ

NON-20

Eaton - Bussmann Electrical DivisionIn Stock: 1095NON-20 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The NON-20 manufactured by Eaton - Bussmann Electrical Division qualifies as a substitute based on the following alignment of critical electrical and mechanical parameters:

Key Substitution Criteria:

• Fuse Class: K5 (both parts)
• Current Rating: 20A (both parts)
• Voltage Rating - AC: 250 VAC (both parts)
• Voltage Rating - DC: 125 VDC (both parts)
• Breaking Capacity @ Rated Voltage: 50kA (both parts)
• Fuse Type: Cartridge (both parts)
• Mounting Requirement: Holder-based installation (both parts)

Substitution is valid where these electrical characteristics and physical form factor requirements are met within the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both the OT20 and NON-20 maintain active product status and carry relevant industry certifications (CE, CSA, UL for NON-20). Selection between these parts should account for the following compliance considerations:

The OT20 provides ROHS3 compliance, making it suitable for applications subject to RoHS3 regulatory requirements. The NON-20 is RoHS non-compliant and should be selected only where RoHS compliance is not a circuit or system requirement.

Both parts are electrically and mechanically equivalent within Class K5 cartridge fuse applications rated for 20A at 250 VAC / 125 VDC with 50kA breaking capacity. Holder-based mounting is required for both configurations.

Frequently Asked Questions (FAQ)

Q: What makes NON-20 a valid substitute for OT20? A: The NON-20 matches all critical electrical parameters: Class K5 fuse type, 20A current rating, 250 VAC / 125 VDC voltage ratings, and 50kA breaking capacity. Both are cartridge-type fuses requiring holder-based installation.

Q: Are there packaging differences between OT20 and NON-20? A: Yes. OT20 is supplied in box packaging, while NON-20 is supplied in bulk packaging. Procurement and inventory management processes may differ accordingly.

Q: What is the primary compliance difference? A: OT20 is ROHS3 compliant, while NON-20 is RoHS non-compliant. Applications requiring RoHS3 certification must use OT20 or equivalent RoHS-compliant alternatives.

Q: Do both fuses require the same holder type? A: Both OT20 and NON-20 are cartridge fuses that require a compatible holder for installation. Verify holder compatibility with the specific cartridge dimensions and electrical ratings before installation.

Q: Can these fuses be used interchangeably in existing circuits? A: Electrical interchangeability is confirmed based on matching Class K5 rating, current, voltage, and breaking capacity specifications. Physical fit within existing holders must be verified using the provided dimensions.