Product Overview
The Littelfuse DRS-50 is a standard, normally open (Form A, SPST-NO) high-power reed switch designed for demanding applications. It features a hermetically sealed glass envelope, ensuring reliable operation unaffected by its environment. Capable of switching high voltages up to 400Vdc and power up to 100W/VA, it can carry up to 6A and switch 3.0A. With a minimum insulation resistance of 1010 ohms and low contact resistance (<100 m), the DRS-50 is suitable for security, limit switching, industrial applications, and white goods. It offers a sensitivity range of 42-83 Ampere-Turns (AT) and a voltage breakdown of 600Vdc.
Product Attributes
- Brand: Littelfuse
- Switch Type: Axial Lead Reed Switch
- Contact Form: A (SPST-NO)
- Body Material: Glass
- Lead Material: Tin-plated Ni-Fe wire
- Agency Approvals: E47258, E471070, DEMKO 14 ATEX 1393U
- RoHS Compliant: Yes
Technical Specifications
| Specification | Value | Unit | Notes |
|---|---|---|---|
| Model | DRS-50 | - | - |
| Glass Envelope Length | 50.80 | mm (2.000") | MAX |
| Glass Envelope Diameter | 5.25 | mm (.207") | MAX |
| Contact Rating | 100 | W/VA | max. |
| Switching Voltage | 400 | Vdc | max. |
| Switching Voltage | 280 | Vac | max. |
| Switching Current | 3.0 | Adc | max. |
| Switching Current | 2.1 | Aac | max. |
| Carry Current | 6.0 | Adc | max. |
| Breakdown Voltage | 600 | Vdc | min. |
| Contact Resistance (Initial) | 0.100 | max. | |
| Insulation Resistance | 1010 | min. | |
| Contact Capacitance | 0.6 | pF | typ. |
| Operating Temperature | -40 to +125 | C | - |
| Storage Temperature | -65 to +125 | C | - |
| Operate Time | 4.5 | ms | max. |
| Release Time | 2.5 | ms | max. |
| Shock Rating | 100 | G | max. (11ms 1/2 sine wave) |
| Vibration Rating | 30 | G | max. (50-2000 Hertz) |
| Resonant Frequency | 850 | Hz | typ. |
| Pull-In Range | 42-83 | AT | - |
| Rating Sensitivity | 60 | AT | - |
Note on Contact Rating: Product of switching voltage and current should not exceed wattage rating. Contact Littelfuse for additional load/life information.
Note on Switching Loads: When switching inductive and/or capacitive loads, consider transient voltages/currents. Refer to Application Notes AN108A and AN107.
Note on Electrical Load Life: Contact Littelfuse with voltage, current values, and load type.
Note on Breakdown Voltage: Per MIL-STD-202, Method 301.
Note on Storage Temperature: Long-term exposure at elevated temperatures may degrade solderability of leads.
2411010936_Littelfuse-DRS-50-62-83_C19586050.pdf
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