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Specifications
Mfr. Part #:
DRS-50-77-88
Key Attributes
Model Number:
DRS-50-77-88
Product Description
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 and power up to 400Vdc at 2mA, with a carry current of 6A and a maximum switching power of 100W/VA. This switch offers high insulation resistance (1010 ohms minimum) and low contact resistance (less than 100 milliohms). Ideal for security systems, limit switching, industrial applications, 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
- Lead Material: Tin-plated Ni-Fe wire
- Certifications: E47258, E471070, DEMKO 14 ATEX 1393U
- RoHS: Compliant (implied by note)
Technical Specifications
| Specification | Value | Notes |
|---|---|---|
| Model Series | DRS-50 | |
| Glass Envelope Length | 50.80mm (2.000") | |
| Glass Envelope Diameter | 5.25mm (.207") | |
| Contact Rating (Switching) | 100W/VA | Product of switching voltage and current should not exceed wattage rating. |
| Switching Voltage (max.) | 400Vdc | |
| Switching Current (max.) | 2mA | |
| Carry Current (max.) | 6.0Adc / 2.1Aac | |
| Breakdown Voltage (min.) | 600Vdc | Per MIL-STD-202, Method 301. |
| Contact Resistance (initial, max.) | 0.100 | |
| Insulation Resistance (min.) | 1010 | |
| Contact Capacitance (typ.) | 0.6 pF | |
| Operating Temperature | -40 to +125 C | |
| Storage Temperature | -65 to +125 C | Long term exposure may degrade solderability. |
| Operate Time (max.) | 4.5ms | Includes bounce. Per EIA/NARM RS-421-A, diode suppressed coil (Coil IV). |
| Release Time (max.) | 2.5ms | Per EIA/NARM RS-421-A, diode suppressed coil (Coil IV). |
| Shock Rating (max.) | 100G | 11ms sine wave. Per EIA/NARM RS-421-A and MIL-STD-202. |
| Vibration Rating (max.) | 30G | 50-2000 Hertz. Per EIA/NARM RS-421-A and MIL-STD-202. |
| Resonant Frequency (typ.) | 850 Hz | |
| Pull-In Range (AT) | 42-83 AT | Standard range. Narrower ranges available upon request. |
| Rating Sensitivity (AT) | 60 AT | Value at which contact ratings and operating characteristics are determined. |
| Agency Approvals | E47258, E471070, DEMKO 14 ATEX 1393U | Range: 42-83 AT |
| Dimensions (Overall Length, max.) | 82.55mm (3.250") | REF. |
| Dimensions (Lead Length, REF.) | 41.27mm (1.625") | REF. |
| Dimensions (Body Length, MIN.) | 15.24mm (.600") | MIN. |
| Dimensions (Lead Diameter, REF.) | 0.53mm (.021") | REF. |
| Packaging Option | Bulk | Quantity: 1000 |
2411010915_Littelfuse-DRS-50-77-88_C19363442.pdf
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