MARR-5-22-28 Equivalent & Substitute Parts

Part Overview

The MARR-5-22-28 is a glass body reed switch manufactured by Littelfuse Inc., configured as a SPST-NO (Single Pole Single Throw - Normally Open) device. This component is rated for 350mA AC / 500mA DC switching at 265V AC and 1000V DC, with a 10W power rating and 22–28AT operate range. The part is classified as obsolete, making identification of active equivalent components essential for ongoing system support and new design implementations.

Substiute Parts

MARR-5-22-28

Littelfuse Inc.In Stock: 1217MARR-5-22-28 Datasheet

Current PartRFQ

MVSR-20-22-28

Littelfuse Inc.In Stock: 1219MVSR-20-22-28 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MVSR-20-22-28 qualifies as a direct substitute for the MARR-5-22-28 based on the following critical electrical and mechanical parameters:

• Circuit Configuration: Both parts are SPST-NO reed switches
• Operate Range: Identical 22–28AT specification
• Current Ratings: Matching 350mA AC / 500mA DC switching capacity
• Voltage Ratings: Identical 265V AC and 1000V DC switching voltages
• Power Rating: Both rated at 10W
• Switching Times: Identical 0.75ms operate time and 0.3ms release time
• Physical Dimensions: Matching overall length (2.235" / 56.77mm) and body size (0.105" Dia × 0.775" L)
• Mounting & Termination: Both through-hole mounted with axial termination
• Temperature Range: Identical −75°C to 125°C operating range
• Electrical Characteristics: Matching capacitance (0.2pF) and DC carry current (1.3A)
• Compliance: Both ROHS3 compliant with MSL 1 rating

The MVSR-20-22-28 is manufactured by the same supplier (Littelfuse Inc.) and maintains active product status, providing continuity for applications currently using the obsolete MARR-5-22-28.

Parameter Comparison

Engineering Selection Recommendations

The MVSR-20-22-28 is the direct equivalent for the obsolete MARR-5-22-28. Selection of the MVSR-20-22-28 is supported by:

• Active Product Status: The MVSR-20-22-28 maintains active manufacturing status, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: Both parts meet ROHS3 requirements and carry identical MSL 1 ratings, confirming compatibility with current environmental and reliability standards
• Electrical & Mechanical Equivalence: All critical parameters—switching ratings, voltage specifications, timing characteristics, physical dimensions, and thermal range—are identical between the two parts
• Same Manufacturer: Littelfuse Inc. manufactures both components, ensuring consistent quality and performance standards

For applications currently using the MARR-5-22-28, direct substitution with the MVSR-20-22-28 requires no circuit modifications or design changes.

Frequently Asked Questions (FAQ)

Q: Can the MVSR-20-22-28 be used as a direct replacement for the MARR-5-22-28 without circuit modifications?

A: Yes. The MVSR-20-22-28 is electrically and mechanically equivalent to the MARR-5-22-28. All switching parameters, voltage ratings, current ratings, physical dimensions, and mounting specifications are identical. No circuit redesign is required.

Q: What is the primary reason for substituting the MARR-5-22-28?

A: The MARR-5-22-28 is classified as obsolete. The MVSR-20-22-28 is the active equivalent from the same manufacturer, providing continuity for new designs and ongoing system support.

Q: Are there any differences in packaging between these two parts?

A: The MARR-5-22-28 packaging information is not specified in the available data. The MVSR-20-22-28 is supplied in box packaging. Both parts use identical through-hole axial termination and physical form factors.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the MARR-5-22-28 and MVSR-20-22-28 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings. Both carry EAR99 ECCN classification and identical HTSUS codes (8536.50.9065).

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by: circuit configuration (SPST-NO), operate range (22–28AT), switching current ratings (350mA AC / 500mA DC), switching voltages (265V AC / 1000V DC), power rating (10W), and switching times (0.75ms operate / 0.3ms release).

Q: Are the physical dimensions identical between the two parts?

A: Yes. Both parts have an overall length of 2.235" (56.77mm) and body dimensions of 0.105" diameter × 0.775" length (2.66mm × 19.69mm). Both are through-hole mounted with axial termination, ensuring identical PCB footprint compatibility.