R1973ABLKREDEF3 Equivalent & Substitute Parts

Part Overview

The R1973ABLKREDEF3 is a rocker switch manufactured by E-Switch, featuring SPST (Single Pole Single Throw) configuration with 9A AC rating at 125V. This illuminated panel-mount switch with snap-in installation uses a concave red actuator and incandescent red illumination at 12VDC. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and component procurement.

Substiute Parts

R1973ABLKREDEF3

E-SwitchIn Stock: 1120R1973ABLKREDEF3 Datasheet

Current PartRFQ

LRA22H2BBRLN

ZF ElectronicsIn Stock: 1121LRA22H2BBRLN Datasheet

MFR RecommendedRFQ

LRA22H2FBRLN

ZF ElectronicsIn Stock: 4913LRA22H2FBRLN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the R1973ABLKREDEF3 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Circuit configuration must remain SPST
• Voltage rating must be 125V AC minimum
• Current rating must be 9A AC or greater
• Termination style must be Quick Connect - 0.187" (4.7mm)

Mechanical Compatibility Requirements:

• Mounting type must be Panel Mount, Snap-In
• Actuator type must be Concave (Curved) - Illuminated
• Actuator color must be Red
• Panel cutout dimensions must accommodate the original 19.20mm x 12.80mm rectangular opening

Environmental & Regulatory Requirements:

• Operating temperature range must encompass or exceed -30°C ~ 65°C
• RoHS3 compliance required

The substitute parts LRA22H2BBRLN and LRA22H2FBRLN, both manufactured by ZF Electronics, meet these core substitution criteria. Both are active-status SPST rocker switches rated for 10A AC at 125V with identical mechanical mounting specifications and panel cutout dimensions within tolerance. Both maintain RoHS3 compliance and feature red illuminated concave actuators with Quick Connect termination.

Parameter Comparison

Engineering Selection Recommendations

Both LRA22H2BBRLN and LRA22H2FBRLN are functionally equivalent substitutes for the obsolete R1973ABLKREDEF3 based on electrical and mechanical compatibility. The ZF Electronics alternatives offer active product status with extended mechanical life (100,000 cycles versus 30,000 cycles) and hold CE, cULus, and VDE certifications, providing enhanced regulatory coverage compared to the original part.

Key considerations for selection:

Illumination Voltage Difference: The original R1973ABLKREDEF3 uses 12VDC incandescent illumination, while both ZF Electronics substitutes use 125VAC neon illumination. This represents a functional change requiring circuit design review to ensure compatibility with existing illumination supply infrastructure.

Operating Temperature Range: The substitute parts operate from -20°C to 65°C, compared to the original -30°C to 65°C range. Applications requiring operation below -20°C require design modification or alternative component selection.

Panel Cutout Tolerance: Panel cutout dimensions differ by 0.1mm in each axis (19.10mm x 12.90mm versus 19.20mm x 12.80mm). This variation falls within standard mechanical tolerance and does not preclude direct panel mounting.

Electrical Life Trade-off: Substitute parts specify 6,000 electrical cycles versus the original 10,000 cycles. Applications with high switching frequency require load analysis to confirm adequacy.

Frequently Asked Questions (FAQ)

Q: Can LRA22H2BBRLN and LRA22H2FBRLN be used interchangeably with R1973ABLKREDEF3?

A: Both ZF Electronics parts meet the core electrical and mechanical substitution criteria: SPST configuration, 125V AC rating with 10A capacity (exceeding the original 9A requirement), identical mounting type and termination style, and compatible panel cutout dimensions. However, the illumination voltage change from 12VDC incandescent to 125VAC neon requires circuit compatibility assessment before implementation.

Q: What is the difference between LRA22H2BBRLN and LRA22H2FBRLN?

A: Both parts are electrically and mechanically identical. The primary difference is actuator marking: LRA22H2BBRLN has no marking, while LRA22H2FBRLN includes "O -" marking on the actuator. Selection depends on application-specific labeling requirements.

Q: Are the panel cutout dimensions compatible with the original design?

A: The substitute parts specify 19.10mm x 12.90mm rectangular cutouts compared to the original 19.20mm x 12.80mm. The 0.1mm variation in each dimension is within standard mechanical tolerance and does not require panel modification for direct mounting.

Q: What certifications do the substitute parts carry?

A: LRA22H2BBRLN and LRA22H2FBRLN hold CE, cULus, and VDE certifications, providing broader regulatory coverage than the original R1973ABLKREDEF3. Both maintain ROHS3 compliance.

Q: How do the mechanical and electrical life ratings compare?

A: Substitute parts offer superior mechanical life (100,000 cycles versus 30,000 cycles) but lower electrical life (6,000 cycles versus 10,000 cycles). Applications with high switching frequency should confirm that 6,000 electrical cycles meets operational requirements.

Q: Is the operating temperature range sufficient for my application?

A: The substitute parts operate from -20°C to 65°C, compared to the original -30°C to 65°C. Applications requiring operation below -20°C cannot use these substitutes without design modification.