FR2S1520 Equivalent & Substitute Parts

Part Overview

The FR2S1520 is a Glass Body Reed Switch manufactured by Coto Technology, configured as a single-pole single-throw normally-open (SPST-NO) device. This switch is rated for 500mA switching current at 200V (AC/DC) with a 10VA power rating and operates within a 15–20AT magnetic field range. The FR2S1520 carries an Obsolete product status, making identification of equivalent and substitute components essential for design continuity and procurement planning.

Substiute Parts

FR2S1520

Coto TechnologyIn Stock: 826FR2S1520 Datasheet

Current PartRFQ

MDSR-7-10-20

Littelfuse Inc.In Stock: 44222MDSR-7-10-20 Datasheet

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MLRR-4-17-23

Littelfuse Inc.In Stock: 2776MLRR-4-17-23 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the FR2S1520 is based on four critical parameters that define functional interchangeability:

1. Circuit Configuration: All substitutes must maintain SPST-NO topology to preserve switching function
2. Voltage Rating: Minimum 200V switching rating (AC and DC) required to support the original application voltage
3. Current Rating: Minimum 500mA switching capacity required to handle the original load current
4. Operating Temperature Range: -40°C to 125°C support required for thermal compatibility

Both substitute parts identified—MDSR-7-10-20 and MLRR-4-17-23—satisfy these core requirements while accommodating variations in mounting type and magnetic operate range as secondary design parameters.

Parameter Comparison

Engineering Selection Recommendations

MDSR-7-10-20 Suitability: This substitute maintains full DC voltage and current compatibility (200V, 500mA DC). AC applications require evaluation, as the AC current rating (350mA) falls below the FR2S1520 specification (500mA AC). The product is Active status with ROHS3 compliance. Through-hole mounting requires PCB redesign from the original surface-mount configuration.

MLRR-4-17-23 Suitability: This substitute provides superior current handling (700mA AC, 1A DC) and power capacity (20W) relative to the FR2S1520. DC voltage and current specifications align with the original design. AC applications are supported at 140V, which is below the original 200V AC rating. Product is Active status with ROHS3 compliance. Through-hole mounting requires PCB redesign.

Both substitutes maintain thermal operating range compatibility (-40°C to 125°C) and MSL Level 1 moisture sensitivity classification, ensuring equivalent environmental performance. Active product status ensures continued manufacturing availability and supply chain access.

Frequently Asked Questions (FAQ)

Q: Can MDSR-7-10-20 directly replace FR2S1520 in AC applications? A: No. The MDSR-7-10-20 is rated for 350mA AC switching current, which is below the FR2S1520 specification of 500mA AC. It is suitable only for applications where AC switching current does not exceed 350mA.

Q: Is MLRR-4-17-23 suitable for 200V AC applications? A: No. The MLRR-4-17-23 has a 140V AC switching voltage rating, below the FR2S1520 specification of 200V AC. It is suitable only for applications with AC switching voltage ≤140V.

Q: What is the impact of mounting type differences between surface mount and through hole? A: Mounting type differences require PCB redesign for component placement and trace routing. Both MDSR-7-10-20 and MLRR-4-17-23 are through-hole devices, whereas the FR2S1520 is surface mount. Electrical performance remains unaffected once properly integrated into the new PCB layout.

Q: Do the substitute parts share the same operate range as the FR2S1520? A: No. The FR2S1520 operates at 15–20AT; MDSR-7-10-20 operates at 10–20AT; MLRR-4-17-23 operates at 17–23AT. Magnet selection and mounting geometry may require adjustment to achieve consistent actuator performance in the target application.

Q: Are both substitutes environmentally compliant with the original part? A: Yes. All three parts—FR2S1520, MDSR-7-10-20, and MLRR-4-17-23—carry ROHS3 compliance, REACH Unaffected status, and MSL Level 1 classification. Environmental and regulatory requirements are satisfied by either substitute.

Q: Why is MLRR-4-17-23 listed as a substitute if it has a lower AC voltage rating? A: MLRR-4-17-23 is listed as a substitute because it meets or exceeds the core DC electrical specifications (200V DC, 500mA minimum). Applications operating exclusively in DC mode or AC mode below 140V may use this part. AC applications requiring 200V operation must use MDSR-7-10-20 or identify an alternative.