Product Overview
The Littelfuse DRS-50 is a standard, normally open (Form A, SPST-NO) high-power reed switch designed for robust switching applications. It features a hermetically sealed glass envelope that protects the contacts from the external environment. Capable of switching high voltages up to 400Vdc and handling power up to 100W/VA, this switch is suitable for applications requiring high insulation resistance and low contact resistance. Its design allows for switching European mains voltage and requires zero operating power for contact closure. Common applications include security systems, limit switching, industrial automation, and white goods.
Product Attributes
- Brand: Littelfuse
- Product Line: DRS-50 High Power Reed Switch
- Contact Form: A (SPST-NO - Single-pole, single-throw, normally open)
- Body Material: Glass
- Leads Material: Tin-plated Ni-Fe wire
- Approvals: E47258, E471070, DEMKO 14 ATEX 1393U
- RoHS Compliant: Yes
Technical Specifications
| Specification | Value | Unit | Notes |
|---|---|---|---|
| Glass Envelope Length | 50.80 | mm (2.000") | Max. |
| Glass Envelope Diameter | 5.25 | mm (.207") | Max. |
| Switching Voltage (Max.) | 400 | Vdc | |
| Switching Current (Max.) | 2 | mA | |
| Carry Current (Max.) | 6.0 | Adc | |
| Carry Current (Max.) | 2.1 | Aac | |
| Switching Power (Max.) | 100 | W/VA | |
| Breakdown Voltage (Min.) | 600 | Vdc | Per MIL-STD-202, Method 301 |
| Contact Resistance (Initial, Max.) | 0.100 | ||
| Insulation Resistance (Min.) | 1010 | ||
| Contact Capacitance (Typical) | 0.6 | pF | |
| Operating Temperature | -40 to +125 | C | |
| Storage Temperature | -65 to +125 | C | Long time exposure at elevated temperature may degrade solderability of the leads |
| Operate Time (Max.) | 4.5 | ms | Including bounce, per EIA/NARM RS-421-A |
| Release Time (Max.) | 2.5 | ms | Per EIA/NARM RS-421-A |
| Shock Rating (Max.) | 100 | G | 11ms 1/2 sine wave, per EIA/NARM RS-421-A and MIL-STD-202 |
| Vibration Rating (Max.) | 30 | G | 50-2000 Hertz, per EIA/NARM RS-421-A and MIL-STD-202 |
| Resonant Frequency (Typical) | 850 | Hz | |
| Pull-In Range (Ampere-Turns) | 42-83 | AT | Rating Sensitivity: 60 AT |
| Packaging Option | Bulk | Quantity: 1000 |
Note: Specifications are subject to change without notice.
2411010934_Littelfuse-DRS-50-72-83_C19512171.pdf
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