ED2/EF2 series miniature signal relays are NEC's new ultra-low power consumption relays, achieving 50 mW of ultra low power consumption.
The ED2/EF2 series from NEC are ultra‑low‑power miniature signal relays available in through‑hole (ED2) and surface‑mount (EF2) versions. They feature 50 mW power consumption, high breakdown voltage, and a 20‑year joint life under specified temperature conditions. Applications include electronic switching systems, PBX, telephone equipment, and other instrumental devices.
The datasheet details dimensions, pad layouts, pin configurations, marking conventions, safety ratings (UL, CSA), and extensive performance data such as switching power, voltage, current, insulation resistance, contact material, temperature ranges, and coil voltage options.
| Power consumption (non‑latch) | 50 to 70 mW |
|---|---|
| Power consumption (single‑coil latch) | 30 to 80 mW |
| Power consumption (double‑coil latch) | 50 to 80 mW |
| Maximum switching power | 30 W (resistive) |
| Maximum switching voltage | 220 Vdc / 250 Vac |
| Maximum switching current | 1 A |
| Insulation resistance | 1000 MΩ at 500 Vdc |
| Contact material | Silver alloy with gold alloy overlay |
| Weight | Approximately 2.2 g |
| Operating temperature (non‑latch) | -40 °C to +85 °C |
| Coil temperature rise | 7 °C at nominal coil voltage |
| Nominal coil voltage options | 1.5, 3, 4.5, 5, 6, 9, 12, 24 V |
Non‑latch types consume 50 to 70 mW, single‑coil latch types 30 to 80 mW, and double‑coil latch types 50 to 80 mW.
The relays can switch up to 30 W (resistive), 220 Vdc or 250 Vac, and a maximum current of 1 A.
Non‑latch types operate from –40 °C to +85 °C, while latch types operate from 40 °C to +70 °C.
Each relay weighs approximately 2.2 grams.