Provides technical data for ED2 Series and EF2 Series miniature signal relays.
This handbook gives the basic characteristics, test data, and recommended usage of NEC's ED2 (DIP type) and EF2 (SMD type) miniature signal relays. It covers electrical parameters, mechanical construction, and environmental test results for designers and engineers.
The document describes the relay structure, material composition, and quality grades, and includes detailed tables of switching power, coil voltage, timing, thermal characteristics, and various environmental tests such as high‑temperature, moisture resistance, and vibration.
| Cover material | Liquid crystalline polymer |
|---|---|
| Base material | Liquid crystalline polymer |
| Coil wire material | Polyurethane copper wire |
| Coil spool material | Polyphenylene sulfide |
| Terminal material | Phosphor bronze (surface treated with preparatory solder) |
| Moving contact material | Au‑alloy + Ag‑alloy |
| Stationary contact material | Au‑alloy + Ag‑alloy |
| Contact spring material | Phosphor bronze |
| Magnet material | Cobalt magnet |
| UL rating of parts | UL94V‑0 |
The handbook covers the ED2 series (DIP type) and the EF2 series (SMD type) miniature signal relays.
A diode connected in parallel with the relay coil is recommended to protect the IC from inductive voltage spikes.
NEC/TOKIN devices are classified into Standard, Special, and Specific quality grades.
The relay cover is made of liquid crystalline polymer.