MRPR-8-22-28 Equivalent & Substitute Parts

Part Overview

The MRPR-8-22-28 is a glass body reed switch manufactured by Littelfuse Inc., configured as a SPST-NO (Single Pole Single Throw - Normally Open) device. This through-hole component is rated for 700mA AC / 1A DC switching at 265V AC and 250V DC, with a 50W power rating. The device operates within a 22–28AT magnetic field range with response times of 0.75ms operate and 0.3ms release.

The MRPR-8-22-28 is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing maintenance, repair, and new design requirements where this series is no longer in active production.

Substiute Parts

MRPR-8-22-28

Littelfuse Inc.In Stock: 743MRPR-8-22-28 Datasheet

Current PartRFQ

MRPR-20-22-28

Littelfuse Inc.In Stock: 1944MRPR-20-22-28 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MRPR-20-22-28 qualifies as a direct substitute based on the following critical parameters:

• Circuit Configuration: Both devices are SPST-NO, ensuring identical switching logic and pin functionality
• Operate Range: Both operate within 22–28AT, maintaining identical magnetic sensitivity
• Voltage Ratings: Both are rated for 265V AC and 250V DC switching
• Power Rating: Both are rated at 50W
• Mounting and Termination: Both use through-hole mounting with axial termination
• Physical Dimensions: Both share identical body size (0.112" Dia × 0.800" L) and overall length (2.230")
• Response Times: Both have 0.75ms operate time and 0.3ms release time
• Operating Temperature Range: Both operate from -20°C to 125°C
• Compliance: Both are ROHS3 compliant

The MRPR-20-22-28 is rated for higher switching currents (1.1A AC / 1.5A DC) and carry current (3A DC versus 2.5A DC), making it suitable for applications requiring the MRPR-8-22-28's performance envelope while offering improved current handling capability.

Parameter Comparison

Engineering Selection Recommendations

The MRPR-20-22-28 is the direct substitute for the obsolete MRPR-8-22-28. Selection is based on the following factors:

• Product Status: The MRPR-20-22-28 is active in production, ensuring availability and supply chain continuity
• Functional Equivalence: Both devices share identical circuit configuration, voltage ratings, power rating, operate range, and response times
• Physical Compatibility: Identical mounting type, termination style, and physical dimensions ensure direct PCB compatibility without layout modifications
• Compliance: Both devices meet ROHS3 requirements and carry identical ECCN and HTSUS classifications
• Performance Enhancement: The MRPR-20-22-28 provides higher current ratings (1.1A AC / 1.5A DC switching and 3A DC carry), offering improved margin for applications operating at or near the MRPR-8-22-28 current limits

Frequently Asked Questions (FAQ)

Q: Can the MRPR-20-22-28 directly replace the MRPR-8-22-28 in existing designs?

A: Yes. Both devices are SPST-NO reed switches with identical circuit configuration, voltage ratings, power rating, operate range, mounting type, termination style, and physical dimensions. No PCB modifications or design changes are required.

Q: What are the key differences between these two parts?

A: The MRPR-20-22-28 is rated for higher switching currents (1.1A AC / 1.5A DC versus 700mA AC / 1A DC) and higher carry current (3A DC versus 2.5A DC). The MRPR-20-22-28 is in active production, while the MRPR-8-22-28 is obsolete.

Q: Are there any compliance or certification differences?

A: No. Both devices are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level. Both carry identical ECCN (EAR99) and HTSUS (8536.50.9065) classifications.

Q: What determines substitution eligibility for reed switches in this category?

A: Substitution is determined by matching circuit configuration (SPST-NO), operate range (22–28AT), voltage ratings (265V AC / 250V DC), power rating (50W), mounting type (through hole), termination style (axial), and physical dimensions. Current ratings must meet or exceed application requirements.

Q: Is the MRPR-20-22-28 available in the same packaging as the MRPR-8-22-28?

A: The MRPR-20-22-28 is supplied in bulk packaging. Verify packaging requirements for your procurement process.