FR2S1015 Equivalent & Substitute Parts

Part Overview

The FR2S1015 is a glass body reed switch manufactured by Coto Technology, configured as a single-pole single-throw normally open (SPST-NO) device. This surface mount component is rated for 500mA switching current at 200V AC/DC with a 10VA power rating and operates within the 10–15AT activation range. The FR2S1015 is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and procurement needs.

Substiute Parts

FR2S1015

Coto TechnologyIn Stock: 1053FR2S1015 Datasheet

Current PartRFQ

MDSR-4-12-23

Littelfuse Inc.In Stock: 4594MDSR-4-12-23 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FR2S1015 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Circuit configuration must remain SPST-NO
• Switching current rating must support 500mA minimum
• DC switching voltage must support 200V minimum
• Power rating must support 10VA minimum
• Operating temperature range must encompass -40°C to 125°C

Mechanical Compatibility Criteria:

• Glass body reed switch construction
• Axial termination style
• Overall length and body dimensions within acceptable tolerance for circuit board layout

The MDSR-4-12-23 from Littelfuse Inc. satisfies these substitution criteria with the following considerations: it maintains SPST-NO configuration, supports 500mA DC switching current, and operates at 200V DC. The operate range differs (12–23AT versus 10–15AT), and the mounting type transitions from surface mount to through-hole, requiring circuit board redesign. The power rating increases to 10W, and AC voltage switching capability is not specified for the substitute.

Parameter Comparison

Engineering Selection Recommendations

The MDSR-4-12-23 serves as a functional substitute for the obsolete FR2S1015 in applications requiring SPST-NO reed switch operation at 500mA and 200V DC. Both components maintain identical operating temperature ranges (-40°C to 125°C) and comply with RoHS standards, ensuring regulatory alignment.

Key Considerations for Selection:

The MDSR-4-12-23 is classified as active product status, providing assured long-term availability and supply chain stability compared to the obsolete FR2S1015. Both components are rated for unlimited moisture sensitivity level (MSL 1), indicating no special handling requirements during storage or assembly.

The transition from surface mount to through-hole mounting requires circuit board layout modification. The operate range shift from 10–15AT to 12–23AT affects magnetic activation sensitivity; applications requiring activation below 12AT may require design evaluation. The MDSR-4-12-23 does not specify AC voltage switching capability; applications requiring AC operation at 200V must confirm DC-only operation is acceptable.

The carry current rating decreases from 1.5A to 1.2A on the substitute; applications requiring sustained current above 1.2A must be reassessed. Both components maintain identical release time (0.2 ms), though operate time increases marginally from 0.5 ms to 0.6 ms.

Frequently Asked Questions (FAQ)

Q: Can the MDSR-4-12-23 directly replace the FR2S1015 without circuit board modification?

A: No. The FR2S1015 is surface mount while the MDSR-4-12-23 is through-hole. Circuit board redesign is required to accommodate the different mounting type and overall length (1.590" versus 1.360").

Q: Does the MDSR-4-12-23 support AC voltage switching at 200V?

A: The MDSR-4-12-23 specification lists 200V DC switching voltage only. AC switching capability is not specified. Applications requiring 200V AC operation must confirm DC-only operation meets functional requirements.

Q: What is the impact of the operate range difference (10–15AT versus 12–23AT)?

A: The operate range defines the magnetic field strength required to activate the switch. The MDSR-4-12-23 requires a stronger magnetic field (12–23AT minimum) compared to the FR2S1015 (10–15AT minimum). Applications with weak magnetic activation signals may not function with the substitute.

Q: Are both components RoHS compliant?

A: Yes. The FR2S1015 is RoHS Compliant, and the MDSR-4-12-23 is ROHS3 Compliant. Both meet current RoHS requirements.

Q: What is the difference in current carry rating between these components?

A: The FR2S1015 carries 1.5A (AC/DC) while the MDSR-4-12-23 carries 1.2A (DC). Applications requiring sustained current above 1.2A must be evaluated against the substitute's reduced rating.

Q: Is the 0.1 ms increase in operate time (0.5 ms to 0.6 ms) significant?

A: The operate time difference is 0.1 ms. For applications with strict timing requirements below 0.6 ms, this marginal increase must be verified against system specifications.

Q: Can I use the MDSR-4-12-23 in an application originally designed for AC/DC operation?

A: The MDSR-4-12-23 is specified for DC operation only. If the original application requires AC switching, the substitute is not suitable without confirmation that DC-only operation is acceptable.