800F-ASM2A2

1. Overview

The Allen-Bradley 800F-ASM2A2 is a legacy composite catalog number from Rockwell Automation's Bulletin 800F 22mm IEC round operator family. The part number decodes as: 800F = 22mm IEC family; ASM = Assembled Selector Maintained; 2 = 2-position; A2 = 2-contact configuration (1NO+1NC). This is a factory-assembled selector switch combining a 22mm maintained selector operator with a dual-contact block, shipped as a single SKU. NOTE: This is a SELECTOR SWITCH, not a pushbutton — the catalog's "selector-switch" category classification is correct. The 800F family is Allen-Bradley's flagship 22mm operator line, widely used in North American and global industrial controls. The "ASM" composite SKU format predates Rockwell's modern per-component ordering system (where a comparable unit would be ordered as 800FM-SM22MX11 or 800FD-SM22X11).

2. User Sentiment

No direct user reviews or forum discussions specific to the 800F-ASM2A2 part number were found, consistent with its legacy/obsolete status. However, the 800F selector switch family broadly receives positive industry recognition for reliability: the design uses rigid teeth and positive detents for vibration-insensitive operation with no hang-up between positions, which plant maintenance engineers cite as a key advantage over cheaper alternatives. The modular contact block system is praised on PLCtalk forums for flexibility — users note that Rockwell's configurator allows "assembled" or "user assembled" ordering, though some older assembled composite SKUs can no longer be purchased as a single unit. No significant reported failure modes were found specific to this actuator type.

3. Real-World Applications

The 800F 22mm 2-position maintained selector switch is a staple of industrial operator interface panels in manufacturing, process control, and machine tool applications. Common uses include mode selection (Manual / Auto or Run / Program), machine start/stop control on PLC panels, conveyor line enable/disable, and maintenance bypass switching. The 22mm maintained format is the most common selector switch form factor in North American industrial panels, and Allen-Bradley 800F selectors are installed across virtually all heavy industries including automotive assembly, food and beverage processing, oil and gas, and water treatment facilities. The IP66/Type 4/13 rating makes these suitable for wet and dusty industrial environments.

4. Technical Specifications

• Type: 2-position maintained selector switch (rotary selector, NOT a pushbutton)
• Catalog Family: Allen-Bradley Bulletin 800F, 22mm IEC round operators
• Actuator Function: Maintained (latching — stays in selected position)
• Contact Configuration: 1NO + 1NC (inferred from "A2" suffix and The Button Index entry; equivalent to modern 800F-X11 contact block)
• Cutout Diameter: 22mm (22.5mm nominal hole)
• Switching Angle: 60° (standard 800F selector) to 90° (metal operator variants)
• Electrical Rating: 10A, 600V (A600/AC-15 per IEC 60947-5-1; Q600/DC-13 per DC ratings) — based on 800F family standard
• IP Rating: IP66, NEMA Type 4/4X/13
• Mechanical Life: 300,000–1,000,000 cycles (varies by sub-series; 800FD monolithic = 300k; 800FP/FM = 1M)
• Operating Temperature: -25°C to +70°C
• Certifications: UL, CSA, CE (as listed in Button Index; consistent with active 800F family certifications)
• Construction: Die-cast metal operator (ASM designation without "P" prefix suggests metal body) with screw-type contact block

5. Ordering & Compatibility

The 800F-ASM2A2 is a legacy composite SKU that is no longer listed in active Rockwell Automation catalogs. Santa Clara Systems (an independent gray-market distributor) lists it as out-of-stock with no specifications on file, confirming it exists in trade records but is not readily available new. The modern functional equivalents are: 800FM-SM22MX11 (metal, 2-pos maintained, 1NO+1NC, screw termination) or 800FD-SM22X11 (monolithic plastic, 2-pos maintained, 1NO+1NC). Components can also be ordered separately: operator head (800FM-SM22 or 800FP-SM22) plus contact block 800F-X11D (1NO+1NC, 690V/10A). Compatible accessories include 800F-N2 mounting nut, 800F-AW2 wrench, and 800F series legends/nameplates. Surplus units may be available through Radwell, MROSupply, or legacy parts brokers.

6. Known Issues

No issues specific to the 800F-ASM2A2 were found in available sources, consistent with its discontinued/legacy status limiting available user field data. The broader 800F family is well-regarded for reliability. One consideration: the older "ASM" assembled format may use an earlier contact block design that differs slightly from current 800F-X11D contact blocks — direct contact block interchangeability with current accessories should be verified before field replacement. Sourcing new units is unlikely; refurbished/surplus stock from gray-market suppliers is the primary acquisition path, with the attendant risks of no factory warranty or OEM support.