Equivalent & Substitute Parts for RI-02A Glass Body Reed Switch

Part Overview

The RI-02A is a Glass Body Reed Switch manufactured by Comus International, configured as a SPST-NO (Single Pole Single Throw - Normally Open) contact arrangement. This component is rated for 500mA switching current at 140V AC and 200V DC, with a 10W power rating and operates across a temperature range of -55°C to 125°C. The RI-02A is classified as Obsolete, making identification of functionally equivalent substitute components essential for ongoing design support, maintenance, and production continuity.

Substiute Parts

RI-02A

Comus InternationalIn Stock: 924RI-02A Datasheet

Current PartRFQ

RI-02GP1015

Comus InternationalIn Stock: 37123RI-02GP1015 Datasheet

SimilarRFQ

MDCG-4-7-18

Littelfuse Inc.In Stock: 915MDCG-4-7-18 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RI-02A Glass Body Reed Switch are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Electrical Compatibility Requirements:

• Circuit configuration must be SPST-NO
• Switching voltage must support minimum 140V AC and 200V DC
• Switching current must support minimum 500mA
• Power rating must be minimum 10W
• Operating temperature range must encompass or exceed -55°C to 125°C

Mechanical Compatibility Requirements:

• Component type must be Glass Body Reed
• Mounting type must be Through Hole
• Termination style must be Axial
• Physical dimensions must be compatible with existing PCB layouts

Regulatory Compliance:

• RoHS compliance status must be current (RoHS3 or equivalent)
• REACH status must be unaffected or compliant

Two substitute parts meet these criteria and are presented in order of electrical and operational alignment.

Parameter Comparison

Engineering Selection Recommendations

RI-02GP1015 (Primary Substitute)

The RI-02GP1015 is the preferred substitute for the obsolete RI-02A. Both components are manufactured by Comus International within the same RI-02 series, ensuring design continuity and compatibility. The RI-02GP1015 maintains identical electrical ratings (500mA AC/DC switching current, 140V AC / 200V DC switching voltage, 10W power rating) and identical physical dimensions (1.811" overall length, 0.071" diameter body). The RI-02GP1015 operates at 10 ~ 15AT, which falls within the RI-02A's 7 ~ 21AT operate range, confirming functional compatibility. The RI-02GP1015 is classified as Active product status with ROHS3 compliance, providing long-term availability and regulatory assurance. Switching response times (0.3 ms operate, 0.07 ms release) are identical to the RI-02A.

MDCG-4-7-18 (Secondary Substitute)

The MDCG-4-7-18 manufactured by Littelfuse Inc. is a functionally compatible alternative when RI-02GP1015 availability is constrained. This component meets all core electrical requirements: SPST-NO configuration, 140V AC / 200V DC switching voltage, 10W power rating, and Through Hole axial termination. The MDCG-4-7-18 supports 500mA DC switching current and 350mA AC switching current, meeting or exceeding the RI-02A specification for DC applications. Physical dimensions differ slightly (1.590" overall length, 0.090" diameter body), requiring PCB layout verification. The MDCG-4-7-18 operates at -40°C to 125°C, which covers the upper portion of the RI-02A temperature range but does not extend to -55°C. Switching response times are slower (0.6 ms operate, 0.2 ms release) compared to the RI-02A. The MDCG-4-7-18 is Active product status with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Why is the RI-02A classified as Obsolete?

A: The RI-02A has reached end-of-life status with the manufacturer. The RI-02GP1015 is the direct successor within the same product series, offering identical electrical and mechanical specifications with current product status and improved regulatory compliance (ROHS3).

Q: Can the RI-02GP1015 be used as a direct replacement for the RI-02A?

A: Yes. The RI-02GP1015 is electrically and mechanically identical to the RI-02A. Both components share the same series designation (RI-02), identical physical dimensions, identical switching ratings, and identical response times. No circuit modifications are required.

Q: What is the difference between the RI-02GP1015 and MDCG-4-7-18?

A: The RI-02GP1015 is manufactured by Comus International and maintains exact dimensional and electrical parity with the RI-02A. The MDCG-4-7-18 is manufactured by Littelfuse Inc. and offers functionally equivalent electrical performance but with different physical dimensions, slightly slower switching response times, and a reduced low-temperature operating limit (-40°C versus -55°C). The MDCG-4-7-18 is suitable for applications where the RI-02GP1015 is unavailable and temperature operation does not require -55°C capability.

Q: Are there packaging differences between these substitute parts?

A: The RI-02A and RI-02GP1015 are both available in Through Hole axial termination format. The RI-02GP1015 is packaged in Bulk format. The MDCG-4-7-18 is also Through Hole axial termination. Packaging format does not affect electrical or mechanical compatibility; it relates only to order quantity and handling.

Q: Do all three parts meet current regulatory requirements?

A: The RI-02A is RoHS Compliant. The RI-02GP1015 and MDCG-4-7-18 are both ROHS3 Compliant, representing current regulatory standards. All three parts are REACH Unaffected. Both substitute parts provide enhanced regulatory assurance for new designs and ongoing production.

Q: What is the operating temperature consideration when selecting between RI-02GP1015 and MDCG-4-7-18?

A: The RI-02A and RI-02GP1015 both operate from -55°C to 125°C. The MDCG-4-7-18 operates from -40°C to 125°C. If the application requires operation below -40°C, the RI-02GP1015 is the required choice. If the application operates only above -40°C, the MDCG-4-7-18 is acceptable.

Q: Are the switching response times identical across all three parts?

A: The RI-02A and RI-02GP1015 have identical switching response times (0.3 ms operate, 0.07 ms release). The MDCG-4-7-18 has slower response times (0.6 ms operate, 0.2 ms release). For time-critical applications, the RI-02GP1015 maintains the original performance specification.

Q: Can the MDCG-4-7-18 be used in AC applications rated at 500mA?

A: The MDCG-4-7-18 is rated for 350mA AC switching current, which is lower than the RI-02A specification of 500mA AC. For AC applications requiring 500mA switching current, the RI-02GP1015 is the appropriate substitute. The MDCG-4-7-18 is suitable for AC applications at 350mA or lower.