FR2S2030

Part Overview

The FR2S2030 is a glass body reed switch manufactured by Coto Technology, designed for low-power switching applications requiring SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration. This component operates at 500mA with a maximum switching voltage of 200V and rated power of 10VA, making it suitable for general-purpose signaling and control circuits. The product is currently listed as obsolete, making identification of qualified substitute components essential for design continuity and procurement planning.

Substiute Parts

FR2S2030

Coto TechnologyIn Stock: 1133FR2S2030 Datasheet

Current PartRFQ

MLRR-4-22-28

Littelfuse Inc.In Stock: 779MLRR-4-22-28 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The MLRR-4-22-28 from Littelfuse Inc. qualifies as a functional substitute for the FR2S2030 based on the following alignment of critical electrical parameters:

Compatible Parameters:

• Circuit configuration: Both devices implement SPST-NO switching logic
• Operating temperature range: Identical at -40°C ~ 125°C
• Switching voltage (DC): Both rated at 200V DC maximum
• Switching current (AC): Both capable of handling 500mA or greater AC switching current (MLRR-4-22-28 rated at 700mA AC)
• Glass body reed switch technology: Both employ identical switching mechanism and hermetic construction
• Component type: Both are glass body reed switches with equivalent operational characteristics

Parameter Differences:

• Switching voltage (AC): MLRR-4-22-28 reduced to 140V (versus 200V on FR2S2030)
• Rated power: MLRR-4-22-28 increased to 20W (versus 10VA on FR2S2030)
• Mounting type: MLRR-4-22-28 employs Through Hole mounting (versus Surface Mount on FR2S2030)
• Operate/Release ranges: Specifications differ slightly (22~28AT operate range for MLRR-4-22-28 versus 20~30AT for FR2S2030)

Parameter Comparison

Engineering Selection Recommendations

The MLRR-4-22-28 represents an active product from an established manufacturer with current production and supply chain availability, addressing the procurement challenge posed by the FR2S2030 obsolescence. Both components maintain identical RoHS compliance standards and operating temperature specifications, ensuring regulatory alignment with modern manufacturing requirements.

Selection of the MLRR-4-22-28 as a substitute requires circuit-level assessment of the reduced AC voltage rating (140V versus 200V) and modified mounting technology (Through Hole versus Surface Mount). The increased switching current capacity (700mA AC, 1A DC) and elevated power rating (20W) provide operational headroom in applications where the FR2S2030 was operating near rated limits.

Frequently Asked Questions (FAQ)

Q: Can the MLRR-4-22-28 directly replace the FR2S2030 in existing circuit designs? A: Direct replacement requires evaluation of three factors: (1) AC voltage margin—confirm that your application operates at or below 140V AC to maintain safe operating conditions; (2) mounting footprint—the Through Hole termination style necessitates PCB redesign if the original design utilized Surface Mount configuration; (3) mechanical clearance—verify board space availability for the MLRR-4-22-28 physical dimensions (1.590" length versus 1.360" for FR2S2030).

Q: What electrical parameters ensure functional compatibility between these reed switches? A: Compatibility is established through matching circuit type (SPST-NO), identical DC switching voltage (200V), adequate current capacity in the intended application mode (the MLRR-4-22-28 exceeds FR2S2030 ratings in both AC and DC current), and overlapping operate/release ranges. Both devices utilize glass body reed switch technology with equivalent switching mechanisms and response characteristics.

Q: Are there RoHS or regulatory compliance considerations in selecting the MLRR-4-22-28? A: Both the FR2S2030 and MLRR-4-22-28 maintain RoHS compliance. The MLRR-4-22-28 carries ROHS3 designation (the current standard), while the FR2S2030 carries the earlier RoHS Compliant designation. Both are REACH Unaffected, indicating no environmental or restricted substance concerns for either component. For designs subject to RoHS3 regulatory requirements, the MLRR-4-22-28 provides assurance of compliance with the most current standards.

Q: Why is the AC voltage rating lower on the MLRR-4-22-28 if the DC rating is identical? A: AC and DC voltage ratings on reed switches reflect fundamental differences in electrical stress characteristics. AC signals present different breakdown and arcing behavior compared to DC, resulting in independent rated limits. The 200V DC rating on both components indicates adequate insulation and spacing for direct current applications. Confirmation that your circuit operates within the 140V AC maximum for the MLRR-4-22-28 ensures safety and reliability.