RUMC3AB1GD — 125 VDC Ice Cube Relay, 3 C/O, Current Production
The 125 V DC coil (control circuit voltage) operates within a 100…137.5 V DC range, with a drop-out threshold at ≥ 0.1 Uc DC. Coil resistance is 10000 Ohm at 20 °C ± 10 %. Contact configuration is 3 C/O (three changeover poles) with AgNi material. Rated operational current is 10 A AC-1/DC-1 for normally-open contacts per IEC, with UL ratings of 12 A at 28 V DC-1 and 16 A at 277 V AC-1. Maximum switching capacity is 2500 VA AC / 280 W DC. The lockable test button allows manual actuation for commissioning checks without energizing the coil — useful during panel checkout. No status LED is fitted, so coil state verification relies on the test button or external indication.
Standards and Compliance for Panel Integration
Design certified to EN/IEC 61810-1 (electromechanical elementary relays), UL 508 (industrial control equipment), and CSA C22.2 No 14. These standards cover the relay's use in control panels and industrial machinery — the UL/CSA marks are what panel builders and UL 508A shops look for on the component label. Rated insulation voltage (Ui) is 250 V IEC, 300 V CSA/UL. Impulse withstand voltage (Uimp) is 4 kV, and dielectric strength is 1500 V AC between contacts, 1550 V AC between coil and contact, and 1550 V AC between poles. Protection category RT I indicates the relay is not sealed against flux or washdown; it belongs inside a cabinet, not in a wet area.
Durability and Application Limits
Electrical durability is 100,000 cycles under resistive load; mechanical durability is 5,000,000 cycles. The utilisation coefficient of 20 % means the relay is rated for a 20 % on-time duty cycle under load — continuous energization without switching is fine, but repetitive switching at full load should stay within this duty factor. Minimum switching requirements: 10 mA at 17 V, with a minimum switching capacity of 170 mW. Below these thresholds, the AgNi contacts may not reliably wet — avoid dry-circuit applications (e.g., logic-level signals below 17 V or 10 mA). Operating rate is ≤ 1200 cycles/hour under load, with an operating time of 20 ms. Ambient temperature range for operation is -40…55 °C; storage range extends to 85 °C. Vibration resistance is 3 gn (operating) and 4 gn (non-operating) per EN/IEC 60068-2-27; shock resistance is 10 gn in both states. Safety reliability data: B10d = 100,000 cycles — the number of operations until 10 % of a population fails dangerously. This matters for safety-related control circuits where the relay is part of a fault-exclusion or redundancy scheme.
For contract-manufacturing buyers: this part is on the standard Schneider Electric Harmony Relay portfolio. If your customer's approved vendor list (AVL) specifies Schneider or a specific AML line item, this order code matches. No deviation needed for the 125 V DC coil variant.