MR210C5LBR Rocker Switch DPST 10A 125V - Equivalent & Substitute Parts

Part Overview

The MR210C5LBR is an illuminated rocker switch manufactured by APEM Inc., configured as a double-pole single-throw (DPST) design rated for 10A AC at 125V. This panel-mount, snap-in switch features a red neon-illuminated concave actuator with "O -" marking and quick-connect 0.187" (4.7mm) termination. The product is active, ROHS3 compliant, and rated for 10,000 electrical cycles with an operating temperature range of -20°C to 80°C.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design modifications require different illumination types or actuator colors, or when mechanical life requirements exceed the original specification.

Key Parameters

Parameter	MR210C5LBR Value
Manufacturer	APEM Inc.
Circuit Configuration	DPST
Switch Function	On-Off
Current Rating (AC)	10A
Voltage Rating (AC)	125V
Actuator Type	Concave (Curved) - Illuminated
Actuator Color	Red
Illumination Type	Neon, Red
Termination Style	Quick Connect - 0.187" (4.7mm)
Panel Cutout Dimensions	Rectangular - 19.20mm x 12.90mm
Mounting Type	Panel Mount, Snap-In
Operating Temperature	-20°C ~ 80°C
Electrical Life	10,000 Cycles
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the MR210C5LBR is determined by the following critical parameters that must remain constant or compatible:

Mandatory Compatibility Parameters:

Circuit configuration: DPST
Switch function: On-Off
Voltage rating: 125V AC
Termination style: Quick Connect - 0.187" (4.7mm)
Mounting type: Panel Mount, Snap-In
Panel cutout dimensions: Rectangular format compatible with 19.20mm width

Allowable Variation Parameters:

Current rating: 9A AC (lower rating acceptable for same voltage class)
Actuator color: Red, Green, Yellow
Illumination type: Neon or Incandescent
Illumination voltage: 125 VAC, 250 VAC, 24 VDC, 12 VDC
Actuator marking: O -, Dot, No Marking, O I, ON OFF Vertical
Operating temperature range: May differ
Mechanical life: May exceed original specification
Manufacturer: E-Switch (alternative manufacturer)

All substitute parts listed are from the E-Switch R1973 series, which maintains DPST configuration, 125V AC rating, and quick-connect termination compatibility with the original MR210C5LBR.

Parameter Comparison

Parameter	MR210C5LBR	R1973BBLKBLKAF0	R1973BBLKBLKEF0	R1973BBLKBLKFF0	R1973BBLKBLKGF0	R1973BBLKGILFF1	R1973BBLKGILIF1	R1973BBLKGILIF2	R1973BBLKRILEF4	R1973BBLKRILFF3	R1973BBLKYILEF3
Manufacturer	APEM Inc.	E-Switch	E-Switch	E-Switch	E-Switch	E-Switch	E-Switch	E-Switch	E-Switch	E-Switch	E-Switch
Circuit Configuration	DPST	DPST	DPST	DPST	DPST	DPST	DPST	DPST	DPST	DPST	DPST
Switch Function	On-Off	On-Off	On-Off	On-Off	On-Off	On-Off	On-Off	On-Off	On-Off	On-Off	On-Off
Current Rating (AC)	10A	9A	9A	9A	9A	9A	9A	9A	9A	9A	9A
Voltage Rating (AC)	125V	125V	125V	125V	125V	125V	125V	125V	125V	125V	125V
Actuator Type	Concave - Illuminated	Concave	Concave	Concave	Concave	Concave - Illuminated	Concave - Illuminated	Concave - Illuminated	Concave - Illuminated	Concave - Illuminated	Concave - Illuminated
Actuator Color	Red	Black	Black	Black	Black	Green	Green	Green	Red	Red	Yellow
Illumination Type	Neon, Red	None	None	None	None	Neon, Green	Neon, Green	Neon, Green	Incandescent, Red	Incandescent, Red	Incandescent, Yellow
Illumination Voltage	Not specified	N/A	N/A	N/A	N/A	125 VAC	125 VAC	250 VAC	24 VDC	12 VDC	12 VDC
Actuator Marking	O -	Dot	No Marking	O -	O I	O -	ON OFF, Vertical	ON OFF, Vertical	No Marking	O -	No Marking
Termination Style	Quick Connect - 0.187" (4.7mm)	Quick Connect - 0.187" (4.7mm)	Quick Connect - 0.187" (4.7mm)	Quick Connect - 0.187" (4.7mm)	Quick Connect - 0.187" (4.7mm)	Quick Connect - 0.187" (4.7mm)	Quick Connect - 0.187" (4.7mm)	Quick Connect - 0.187" (4.7mm)	Quick Connect - 0.187" (4.7mm)	Quick Connect - 0.187" (4.7mm)	Quick Connect - 0.187" (4.7mm)
Panel Cutout Dimensions	19.20mm x 12.90mm	19.20mm x 12.80mm	19.20mm x 12.80mm	19.20mm x 12.80mm	19.20mm x 12.80mm	19.20mm x 12.80mm	19.20mm x 12.80mm	19.20mm x 12.80mm	19.20mm x 12.80mm	19.20mm x 12.80mm	19.20mm x 12.80mm
Mounting Type	Panel Mount, Snap-In	Panel Mount, Snap-In	Panel Mount, Snap-In	Panel Mount, Snap-In	Panel Mount, Snap-In	Panel Mount, Snap-In	Panel Mount, Snap-In	Panel Mount, Snap-In	Panel Mount, Snap-In	Panel Mount, Snap-In	Panel Mount, Snap-In
Operating Temperature	-20°C ~ 80°C	-30°C ~ 65°C	-30°C ~ 65°C	-30°C ~ 65°C	-30°C ~ 65°C	-30°C ~ 65°C	-30°C ~ 65°C	-30°C ~ 65°C	-30°C ~ 65°C	-30°C ~ 65°C	-30°C ~ 65°C
Mechanical Life	Not specified	30,000 Cycles	30,000 Cycles	30,000 Cycles	30,000 Cycles	30,000 Cycles	30,000 Cycles	30,000 Cycles	30,000 Cycles	30,000 Cycles	30,000 Cycles
Electrical Life	10,000 Cycles	10,000 Cycles	10,000 Cycles	10,000 Cycles	10,000 Cycles	10,000 Cycles	10,000 Cycles	10,000 Cycles	10,000 Cycles	10,000 Cycles	10,000 Cycles
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed E-Switch R1973 series rocker switches are active products with ROHS3 compliance and REACH unaffected status, matching the regulatory posture of the MR210C5LBR. The primary electrical difference is the current rating: substitute parts are rated for 9A AC versus the original 10A AC specification. This 1A reduction is acceptable for applications where the load current does not exceed 9A.

For direct functional replacement with identical illumination characteristics: Select R1973BBLKRILFF3 (red neon illumination, 125V AC operation, O - marking) when red neon illumination is required and the 9A current rating is acceptable.

For applications requiring higher mechanical durability: All E-Switch R1973 substitutes provide 30,000 mechanical cycles compared to the unspecified mechanical life of the original part, offering extended operational life.

For applications with different illumination requirements:

Green neon illumination: R1973BBLKGILIF1 (125 VAC) or R1973BBLKGILIF2 (250 VAC)
Red incandescent illumination: R1973BBLKRILEF4 (24 VDC) or R1973BBLKRILFF3 (12 VDC)
Yellow incandescent illumination: R1973BBLKYILEF3 (12 VDC)
Non-illuminated: R1973BBLKBLKAF0, R1973BBLKBLKEF0, R1973BBLKBLKFF0, or R1973BBLKBLKGF0

For applications with no illumination requirement: R1973BBLKBLKFF0 (black actuator, O - marking) provides the closest match to the original marking convention while eliminating illumination complexity.

Frequently Asked Questions (FAQ)

Q: Can the MR210C5LBR be replaced with a 9A-rated E-Switch R1973 part? A: Yes, provided the application load current does not exceed 9A. The 125V AC voltage rating and DPST circuit configuration remain identical. The 1A reduction in current capacity is the only electrical difference.

Q: Are the panel cutout dimensions compatible between MR210C5LBR and R1973 substitutes? A: The dimensions are functionally compatible. The MR210C5LBR specifies 19.20mm x 12.90mm, while R1973 parts specify 19.20mm x 12.80mm. The 0.10mm difference in height is within typical panel mounting tolerances for snap-in switches.

Q: What is the difference between neon and incandescent illumination options? A: Neon illumination (R1973BBLKGILFF1, R1973BBLKGILIF1, R1973BBLKGILIF2) operates at AC voltages (125V or 250V). Incandescent illumination (R1973BBLKRILEF4, R1973BBLKRILFF3, R1973BBLKYILEF3) operates at DC voltages (24V or 12V). Select based on available power supply voltage in the application.

Q: Does the operating temperature range difference affect substitution? A: The MR210C5LBR operates from -20°C to 80°C, while R1973 substitutes operate from -30°C to 65°C. The lower upper temperature limit (-65°C vs. 80°C) of the substitute may be restrictive for high-temperature applications. Verify application temperature requirements before selection.

Q: What is the significance of the actuator marking (O -, Dot, No Marking, O I, ON OFF)? A: Actuator marking is a visual indicator only and does not affect electrical function. Selection depends on user interface requirements and operator familiarity. O - marking indicates On-Off positions; ON OFF Vertical provides explicit labeling; No Marking provides a clean appearance.

Q: Are all substitute parts available in the same packaging as the original? A: The MR210C5LBR is packaged as individual units (-), while all E-Switch R1973 substitutes are supplied in bulk packaging. Confirm packaging requirements with your procurement process.

Q: Can non-illuminated R1973 parts replace the illuminated MR210C5LBR? A: Electrically and mechanically, yes. However, the loss of illumination feedback may impact user interface design. Non-illuminated options (R1973BBLKBLKAF0, R1973BBLKBLKEF0, R1973BBLKBLKFF0, R1973BBLKBLKGF0) are suitable only if illumination is not required by the application.

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