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| PartNumber | 1EN51-6 | 1EN51-6B | 1EN51-1B |
| Description | Basic / Snap Action Switches Sealed SE/EN SWITCHES | Limit Switches Sealed limit switch DPDT 4 A 28 Vdc | Basic / Snap Action Switches N.O./N.C. SPDT 4A Enclosed Switch |
| Manufacturer | Honeywell | Honeywell | Honeywell |
| Product Category | Basic / Snap Action Switches | Limit Switches | Basic / Snap Action Switches |
| RoHS | N | N | N |
| Type | Sealed | - | - |
| Contact Form | DPDT | DPDT | SPDT |
| Switch Function | OFF - (ON) | - | ON - (OFF), OFF - (ON) |
| Actuator | Plunger | Plunger | - |
| Current Rating | 4 A | 4 A | - |
| Voltage Rating AC | - | - | - |
| Voltage Rating DC | 28 VDC | 28 VDC | - |
| Operating Force | 26.7 N | 13.34 N to 26.69 N | - |
| Termination Style | Quick Connect | Wire Lead | Quick Connect |
| Illumination Color | - | - | - |
| Brand | Honeywell | Honeywell | Honeywell |
| Illuminated | Non-Illuminated | Non-Illuminated | Non-Illuminated |
| Lamp Type | - | - | - |
| Mounting Style | Chassis Mount | - | Chassis Mount |
| Actuator Style | Plunger | Plunger | - |
| Maximum Operating Temperature | + 85 C | - | + 82 C |
| Minimum Operating Temperature | - 54 C | - | - 40 C |
| Product Type | Snap Action Switches | Limit Switches | Snap Action Switches |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Switches | Switches | Switches |
| Unit Weight | 7.499244 oz | - | 4.000067 oz |
| Series | - | - | V7 |