R1973ABLKREDFF4 Equivalent & Substitute Parts

Part Overview

The R1973ABLKREDFF4 is an illuminated rocker switch manufactured by E-Switch, designed for panel-mount, snap-in applications. This SPST (Single Pole Single Throw) switch operates at 9A AC, 125V with a red concave actuator and incandescent red illumination at 24 VDC. The switch is currently active in production with 835 units in stock. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and functional characteristics align with the original specification, enabling component interchangeability in applications where the primary part becomes unavailable or when design requirements permit alternative manufacturers.

Substiute Parts

R1973ABLKREDFF4

E-SwitchIn Stock: 858R1973ABLKREDFF4 Datasheet

Current PartRFQ

LRA22H2FBRLN

ZF ElectronicsIn Stock: 4913LRA22H2FBRLN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the R1973ABLKREDFF4 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Circuit configuration (SPST required)
• Voltage rating (125V AC minimum)
• Current rating (9A AC minimum)
• Mounting type (Panel Mount, Snap-In)
• Termination style (Quick Connect - 0.187")
• Panel cutout dimensions (compatible with 19.20mm x 12.80mm rectangular opening)
• Actuator type (Concave, illuminated)
• Actuator color (Red)
• Illumination color (Red)

The substitute part LRA22H2FBRLN from ZF Electronics meets these core electrical and mechanical requirements, enabling direct substitution in applications where the original E-Switch component is unavailable. Both parts share identical voltage and termination specifications, compatible panel cutout dimensions, and equivalent functional characteristics for on-off switching applications.

Parameter Comparison

Engineering Selection Recommendations

Both the R1973ABLKREDFF4 and LRA22H2FBRLN are active production components with ROHS3 compliance and REACH unaffected status. The LRA22H2FBRLN offers higher current capacity (10A versus 9A) and extended mechanical life (100,000 versus 30,000 cycles), providing operational margin in applications with sustained switching demands. The ZF Electronics substitute carries CE, cULus, and VDE certifications, supporting deployment in regulated markets.

Key differences in illumination architecture exist: the original E-Switch part uses incandescent illumination at 24 VDC, while the ZF Electronics substitute employs neon illumination at 125 VAC. This distinction requires verification of circuit compatibility with the host application's illumination power supply. Panel cutout dimensions are nominally equivalent (19.20mm x 12.80mm versus 19.10mm x 12.90mm), permitting mechanical interchangeability in standard panel installations. The operating temperature range of the substitute (-20°C to 65°C) is narrower than the original (-30°C to 65°C), requiring assessment for applications in low-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can the LRA22H2FBRLN directly replace the R1973ABLKREDFF4 in all applications?

A: Direct mechanical and electrical substitution is supported for SPST on-off switching at 125V AC. However, the illumination voltage difference (24 VDC original versus 125 VAC substitute) requires circuit compatibility verification. Applications using the original 24 VDC illumination supply cannot operate the substitute without circuit modification.

Q: What are the panel cutout dimension tolerances for substitution?

A: The original part specifies 19.20mm x 12.80mm, and the substitute specifies 19.10mm x 12.90mm. These dimensions are within typical panel fabrication tolerances for rectangular snap-in openings, permitting mechanical interchangeability without panel modification.

Q: Does the higher current rating of the substitute (10A versus 9A) affect compatibility?

A: The 10A rating of the LRA22H2FBRLN exceeds the 9A requirement of the original application, providing operational margin. This represents a compatible upgrade with no adverse effects on circuit performance.

Q: Are there temperature range limitations for the substitute?

A: The LRA22H2FBRLN operates from -20°C to 65°C, compared to the original -30°C to 65°C range. Applications requiring operation below -20°C must retain the original E-Switch component.

Q: What is the difference between incandescent and neon illumination in these switches?

A: The original uses incandescent illumination powered at 24 VDC, while the substitute uses neon illumination powered at 125 VAC. Neon illumination typically offers longer service life and lower power consumption but requires the host circuit to supply 125 VAC to the illumination terminals.

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

A: The original part specifies 30,000 mechanical cycles and 10,000 electrical cycles. The substitute specifies 100,000 mechanical cycles and 6,000 electrical cycles. The substitute exhibits superior mechanical durability but lower electrical cycle endurance. Application requirements determine which specification is more critical.

Q: What certifications does the substitute carry?

A: The LRA22H2FBRLN carries CE, cULus, and VDE certifications, supporting compliance requirements in European and North American markets. The original part does not specify approval agencies.