Product Overview
The Littelfuse DRS-50 is a standard, normally open (Form A) high-power reed switch designed for demanding applications. Featuring a hermetically sealed glass envelope, it offers protection from environmental factors and is capable of switching high voltages and power up to 400Vdc at 2mA, with a carry current of 6A and a maximum switching power of 100W/VA. Its high insulation resistance (1010 ohms minimum) and low contact resistance (less than 100 milliohms) ensure reliable performance. The DRS-50 is suitable for security systems, limit switching, industrial applications, and white goods, offering zero operating power for contact closure.
Product Attributes
- Brand: Littelfuse
- Product Type: High Power Reed Switch
- Contact Form: A (SPST-NO - Single-pole, single-throw, normally open)
- Body Material: Glass
- Lead Material: Tin-plated Ni-Fe wire
- Certifications: E47258, E471070, DEMKO 14 ATEX 1393U
- RoHS Compliant: Yes
Technical Specifications
| Specification | Value | Notes |
|---|---|---|
| Model Series | DRS-50 | 50.8mm High Power Reed Switch |
| Glass Envelope Length | 50.80mm (2.000") MAX | |
| Glass Envelope Diameter | 5.25mm (.207") MAX | |
| Contact Rating (Switching) | 100 W/VA MAX | Product of switching voltage and current should not exceed wattage rating. |
| Switching Voltage | 400 Vdc MAX | |
| Switching Current | 2 mA MAX | |
| Carry Current | 6.0 Adc MAX | |
| Breakdown Voltage | 600 Vdc MIN | Per MIL-STD-202, Method 301 |
| Contact Resistance (Initial) | 0.100 MAX | |
| Insulation Resistance | 1010 MIN | |
| Capacitance (Contact, Typical) | 0.6 pF | |
| Operating Temperature | -40 to +125 C | |
| Storage Temperature | -65 to +125 C | Long exposure may degrade solderability. |
| Operate Time (Max) | 4.5 ms | Includes bounce, per EIA/NARM RS-421-A |
| Release Time (Max) | 2.5 ms | Per EIA/NARM RS-421-A |
| Shock Resistance (Max) | 100 G | 11ms 1/2 sine wave, per EIA/NARM RS-421-A |
| Vibration Resistance (Max) | 30 G | 50-2000 Hertz, per EIA/NARM RS-421-A |
| Resonant Frequency (Typical) | 850 Hz | |
| Ampere-Turns Range (Standard) | 42-83 AT | Available in narrower ranges. |
| Rating Sensitivity | 60 AT | Value at which ratings and characteristics are determined. |
| Packaging Options | Bulk, Taping | Bulk quantity: 1000 |
| Agency File Numbers | E47258, E471070 | |
| AT Range Examples | 42-48 AT, 42-53 AT, 42-83 AT, etc. | Product Part Number example: DRS-50-42-83 |
2411010926_Littelfuse-DRS-50-52-58_C19460292.pdf
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