MRPR-3-17-23 Equivalent & Substitute Parts

Part Overview

The MRPR-3-17-23 is a glass body reed switch manufactured by Littelfuse Inc., configured as a single-pole single-throw normally open (SPST-NO) device. This component is rated for 1.1A AC / 1.5A DC switching at 140V AC / 200V DC with a 50W power rating and operates within the 17–23AT activation range. The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs.

Substiute Parts

MRPR-3-17-23

Littelfuse Inc.In Stock: 965MRPR-3-17-23 Datasheet

Current PartRFQ

MRPR-20-17-23

LittelfuseIn Stock: 9628MRPR-20-17-23 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MRPR-3-17-23 is determined by the following critical parameters:

• Circuit Configuration: Must remain SPST-NO
• Operate Range: Must match 17–23AT activation threshold
• Current Rating: Must support minimum 1.1A (AC) / 1.5A (DC) switching
• Voltage Rating: Must support minimum 140V (AC) / 200V (DC) switching
• Power Rating: Must support minimum 50W
• Mounting Type: Must be Through Hole with Axial termination
• Physical Dimensions: Overall length and body diameter must be compatible with existing PCB layouts
• Operating Temperature: Must cover the required range

The MRPR-20-17-23 qualifies as a direct substitute because it maintains identical circuit configuration, operate range, current and power ratings, mounting type, and termination style. The substitute provides enhanced voltage ratings (265V AC / 250V DC) and remains in active production status with full RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The MRPR-20-17-23 is the qualified substitute for the obsolete MRPR-3-17-23. Selection is based on the following engineering criteria:

Product Status: The MRPR-20-17-23 is in active production, ensuring long-term availability and supply chain continuity compared to the obsolete MRPR-3-17-23.

Electrical Compatibility: Both parts maintain identical switching current (1.1A AC / 1.5A DC), power rating (50W), and operate range (17–23AT). The substitute provides higher voltage ratings (265V AC / 250V DC versus 140V AC / 200V DC), making it suitable for applications requiring the original specifications and those with higher voltage requirements.

Mechanical Compatibility: Both parts feature identical mounting type (Through Hole), termination style (Axial), and overall length (2.230" / 56.64mm). Body diameter remains constant at 0.112" (2.84mm). Body length increases marginally from 0.775" to 0.800" (19.69mm to 20.32mm), a 0.025" (0.63mm) difference that does not affect standard PCB layout compatibility.

Compliance: Both parts are ROHS3 compliant with MSL rating of 1 (Unlimited) and identical ECCN classification (EAR99).

Temperature Consideration: The substitute operates from -20°C to 125°C versus the original -40°C to 125°C. Applications requiring operation below -20°C must retain the original part or identify alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the MRPR-20-17-23 directly replace the MRPR-3-17-23 in existing designs?

A: Yes, for applications operating at or above -20°C. The substitute maintains identical circuit configuration, switching current, power rating, mounting type, and termination style. The marginal increase in body length (0.025") does not affect standard through-hole PCB layouts. Applications requiring operation below -20°C must retain the original part.

Q: What is the primary difference between these two parts?

A: The MRPR-20-17-23 provides higher voltage ratings (265V AC / 250V DC) compared to the MRPR-3-17-23 (140V AC / 200V DC) and operates from -20°C instead of -40°C. The substitute is in active production while the original is obsolete.

Q: Are there any physical dimension concerns when substituting?

A: The overall length remains identical at 2.230" (56.64mm). Body diameter is unchanged at 0.112" (2.84mm). Body length increases by 0.025" (0.63mm), from 0.775" to 0.800", which is negligible for standard through-hole applications and does not require PCB redesign.

Q: Do both parts have the same RoHS and compliance status?

A: Yes. Both the MRPR-3-17-23 and MRPR-20-17-23 are ROHS3 compliant with MSL rating 1 (Unlimited) and EAR99 ECCN classification.

Q: What is the operate range specification, and does it differ between parts?

A: Both parts operate in the 17–23AT range, meaning they activate when exposed to a magnetic field between 17 and 23 ampere-turns. This specification is identical for both the main part and substitute.

Q: Can the MRPR-20-17-23 be used in low-temperature applications below -20°C?

A: No. The MRPR-20-17-23 is rated for -20°C to 125°C operation. Applications requiring operation below -20°C must use the original MRPR-3-17-23 (rated -40°C to 125°C) or identify alternative components with appropriate low-temperature specifications.