MR210C5LBG Equivalent & Substitute Parts

Part Overview

The MR210C5LBG is a rocker switch manufactured by APEM Inc., classified as DPST (Double Pole Single Throw) with a 10A AC rating at 125V. This panel-mount, snap-in switch features a concave illuminated green actuator with neon illumination and quick-connect 0.187" termination. The product is currently obsolete, making equivalent substitutes necessary for ongoing maintenance and new designs requiring compatible functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	MR210C5LBG
Manufacturer	APEM Inc.
Circuit Configuration	DPST
Current Rating (AC)	10A
Voltage Rating (AC)	125V
Mounting Type	Panel Mount, Snap-In
Termination Style	Quick Connect - 0.187" (4.7mm)
Panel Cutout Dimensions	Rectangular - 19.20mm x 12.90mm
Actuator Type	Concave (Curved) - Illuminated
Illumination Type	Neon, Green
Operating Temperature Range	-20°C ~ 80°C
Electrical Life	10,000 Cycles
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Circuit Configuration: Must be DPST
Current Rating: Minimum 10A AC (higher ratings are acceptable)
Voltage Rating: Minimum 125V AC (higher ratings are acceptable)
Mounting Type: Panel Mount, Snap-In
Termination Style: Quick Connect - 0.187" (4.7mm)
Panel Cutout Dimensions: Rectangular - 19.20mm x 12.90mm (±0.10mm tolerance acceptable)

Substitute parts are categorized as follows:

Direct Equivalent: LRA32H2FBGLN (ZF Electronics) — Meets all critical parameters with identical electrical specifications and mechanical compatibility.

Compatible Substitutes: R1973 series parts (E-Switch) — Meet core electrical and mechanical requirements with minor parameter variations (9A current rating, different actuator colors/markings, alternative illumination types). These are functionally compatible for applications within their electrical ratings.

Similar Substitutes: 737W-B/01 (Qualtek) — Meets mechanical and termination requirements with higher voltage rating (250V) but lacks illumination features.

Parameter Comparison

Parameter	MR210C5LBG (APEM)	LRA32H2FBGLN (ZF)	R1973BBLKBLKFF0 (E-Switch)	737W-B/01 (Qualtek)
Circuit	DPST	DPST	DPST	DPST
Current Rating (AC)	10A	10A	9A	10A
Voltage Rating (AC)	125V	125V	125V	250V
Mounting Type	Panel Mount, Snap-In	Panel Mount, Snap-In	Panel Mount, Snap-In	Panel Mount, Snap-In
Termination Style	Quick Connect - 0.187"	Quick Connect - 0.187"	Quick Connect - 0.187"	Quick Connect - 0.187"
Panel Cutout (mm)	19.20 x 12.90	19.10 x 12.90	19.20 x 12.80	19.20 x 12.90
Actuator Type	Concave - Illuminated	Concave - Illuminated	Concave	Concave
Illumination	Neon, Green	Neon, Green	None	None
Operating Temperature	-20°C ~ 80°C	-20°C ~ 65°C	-30°C ~ 65°C	Not specified
Electrical Life	10,000 Cycles	6,000 Cycles	10,000 Cycles	Not specified
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

Primary Recommendation: LRA32H2FBGLN (ZF Electronics) is the direct equivalent for MR210C5LBG replacement. It maintains identical electrical specifications (10A, 125V AC, DPST), matching illumination (neon green), and mechanical compatibility. ZF Electronics is an active manufacturer with current product support. Panel cutout dimensions differ by 0.10mm (19.10mm vs 19.20mm), which falls within standard mechanical tolerance for snap-in installations. This part is ROHS3 compliant and holds CE, cULus, and VDE certifications.

Secondary Recommendation: R1973BBLKBLKFF0 (E-Switch) is suitable for applications where the 9A current rating is acceptable and illumination is not required. This part offers superior mechanical life (30,000 cycles vs 10,000 cycles) and extended operating temperature range (-30°C to 65°C). Panel cutout dimensions are identical to the original part. E-Switch maintains active product status with ROHS3 compliance.

Alternative for Higher Voltage Applications: 737W-B/01 (Qualtek) accommodates 250V AC applications while maintaining 10A current rating and identical panel cutout dimensions. This part lacks illumination features and is suitable only for non-illuminated switch requirements.

Frequently Asked Questions (FAQ)

Q: Can LRA32H2FBGLN directly replace MR210C5LBG without panel modifications?

A: Yes. Both parts use identical snap-in mounting with quick-connect 0.187" termination. Panel cutout dimensions differ by 0.10mm (19.10mm vs 19.20mm), which is within standard mechanical tolerance for snap-in installations and does not require panel rework.

Q: What is the impact of the 9A current rating on R1973BBLKBLKFF0 compared to the 10A original?

A: The R1973BBLKBLKFF0 is rated for 9A AC at 125V. Applications drawing exactly 10A will exceed this part's rating. Use this substitute only in circuits with confirmed maximum current draw below 9A.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitutes (LRA32H2FBGLN, R1973 series, and 737W-B/01) are ROHS3 compliant, matching the original MR210C5LBG compliance status.

Q: Does the LRA32H2FBGLN illumination voltage differ from the original?

A: The LRA32H2FBGLN specifies 125 VAC illumination voltage, while the original MR210C5LBG does not specify illumination voltage. Both use neon green illumination and are designed for 125V AC operation. Illumination will function identically in standard 125V AC circuits.

Q: What is the difference in electrical life between MR210C5LBG and its substitutes?

A: MR210C5LBG is rated for 10,000 electrical cycles. LRA32H2FBGLN is rated for 6,000 cycles, while R1973 series parts are rated for 10,000 cycles. For high-cycle applications, R1973 series maintains equivalent electrical life to the original.

Q: Can R1973BBLKBILIF1 or R1973BBLKBILIF2 replace MR210C5LBG?

A: These parts are electrically compatible (9A, 125V, DPST) but feature blue illumination instead of green, and differ in illumination voltage (125 VAC and 250 VAC respectively). Use only if blue illumination is acceptable for your application.

Q: Is 737W-B/01 suitable for 125V AC circuits?

A: Yes. 737W-B/01 is rated for 250V AC, which exceeds 125V AC requirements. It is suitable for 125V AC circuits but lacks illumination features. Use only in applications where illumination is not required.

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