440P-MMHB22E
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Overview of Allen Bradley 440P-MMHB22E
The Allen Bradley 440P-MMHB22E is a 30 mm large metal safety limit switch designed for reliable operation in industrial environments. It features a durable die-cast alloy housing with a short metal roller lever actuator for precise and consistent mechanical actuation. Suitable for safety and control circuits, this limit switch offers break-before-make contact functionality with 2 normally closed and 2 normally open contacts. This model supports conduit entry with a 1/2 inch NPT thread and is built to meet various international safety standards including UL, CE, and CUL. Its construction allows it to function effectively within a broad temperature range from -25°C to 65°C, making it ideal for demanding industrial automation settings.
Key Features of Allen Bradley 440P-MMHB22E
- 30 mm large metal IEC style mounting for secure installation
- Short metal roller lever actuator providing precise mechanical response
- 4 circuit contacts: 2 normally closed (N.C.) and 2 normally open (N.O.)
- Break-before-make contact design to ensure safe and reliable switching
- Housing constructed from durable die-cast alloy for longevity
- Conduit entry via 1/2 inch NPT threaded opening for wiring protection
- Wide operating temperature range from -25°C to 65°C for harsh environments
- Spring return mechanism to reset actuator position automatically
- Compatibility with multiple industrial safety standards: UL, CE, CUL, CCC, KC
Technical Specs of 440P-MMHB22E
| Specification | Details |
|---|---|
| Mounting | 30 mm Large IEC Style |
| Actuator Type | Short Metal Roller Lever |
| Contacts | 2 Normally Closed, 2 Normally Open (Break Before Make) |
| Enclosure Material | Die-cast Alloy Metal |
| Conduit Entry | 1/2 inch NPT Threaded |
| Operating Temperature | -25°C to 65°C |
| Electrical Ratings | 6 A at 125 VAC, 3 A at 230 VAC, 2.2 A at 125 VDC, 1.1 A |
| Mechanical Life | Approx. 10,000,000 operations |
| Standards | UL, CE, CUL, CCC, KC |
Applications / Use Case
The Allen Bradley 440P-MMHB22E safety limit switch serves critical functions in industrial automation, manufacturing machinery, and safety systems. Its robust metal construction and reliable contact design make it suitable for environments requiring precise position detection and safety interlocking. Common uses include monitoring guard doors, conveyor systems, and automated equipment to detect presence or position of machine components. The break-before-make contact ensures safety by preventing simultaneous contact engagement. Designed for harsh conditions, this switch operates effectively across temperature extremes and mechanical stress, making it a preferred choice for factory automation, packaging machinery, and processing plants where safety and operational reliability are mandatory.
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