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| Part Number | MK04-1A66B-500W | MK04-1A66C-500W | MK04-1A66D-500W | MK04-1B90C-500W | MK04R-1A66C-500W |
| Manufacturer | Standex-Meder Electronics | Standex-Meder Electronics | Standex-Meder Electronics | Standex-Meder Electronics | Standex-Meder Electronics |
| Series | MK04 | MK04 | MK04 | MK04 | MK04R |
| Package/Case | Molded Body | Molded Body | Molded Body | Molded Body | Flange Mount |
| Packaging | Bulk | Bulk | Bulk | Bulk | Bulk |
| Product Status | Active | Active | Active | Active | Active |
| Type | Reed Switch | Reed Switch | Reed Switch | Reed Switch | Reed Switch |
| Output Type | SPST-NO | SPST-NO | SPST-NO | SPST-NC | SPST-NO |
| Actuator Material | Magnet | Magnet | Magnet | Magnet | Magnet |
| Termination Style | Cable, Flat | Cable, Flat | Cable, Flat | Cable, Flat | Cable Leads |
| Frequency | - | - | - | - | - |
| Voltage - Supply | - | - | - | - | - |
| Must Operate | 10 ~ 60AT | 10 ~ 60AT | 10 ~ 60AT | 15 ~ 20AT | - |
| Must Release | - | - | - | - | - |
| Operating Temperature | -30°C ~ 70°C | -30°C ~ 70°C | -30°C ~ 70°C | -30°C ~ 70°C | -30°C ~ 80°C |
| Grade | - | - | - | - | - |
| Qualification | - | - | - | - | - |
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