Circuit Breakers Switches & Pilot Lights Display Lights Relays & Sockets Timers Terminal Blocks NRBM Series Circuit Breakers NRBM Series NRBM circuit breakers are the largest in rated current (1A to 50A) among the IDEC circuit breakers series. These small sized, high-ef ciency breakers offer a variety of protection characteristics that can be widely employed for semiconductors, relay circuits, heater circuits, transformers, and solenoids. Key features of the NRBM series include: Excellent overload and short circuit protection Small size and high ef ciency Life expectancy of over 10,000 operations UL1077 recognized Supplementary Protectors VDE Certi ed to EN60934 License 113434 File No. E68029 General Speci cations Protection Method Electromagnetic tripping Internal Circuit Series current trip Number of Poles 1, 2, 3 Rated Voltage 250V AC, 50/60Hz, 65V DC Rated Tripping Currents Current trip: 1A, 2A, 3A, 5A, 7.5A, 10A, 15A, 20A, 25A, 30A, 40A, 50A 250V AC, 50/60Hz, 1,000A Rated Interrupting Capacity 65V DC, 1,000A SPDT microswitch Auxiliary Contacts / Alarm 250V AC, 5A (resistive load) Contact 50V DC, 1 A (resistive load) Reference Temperature 25C Ambient Operating Temperature 40 to +85C (avoid freezing) Insulation Resistance 100M (measured with 500V megger) Between main circuit terminals: 2,000V AC, 1 minute Dielectric Strength Between main circuit and auxiliary contact: 2,000V AC, 1 minute Vibration Resistance 100N (approximately 10G), 10 to 55Hz Shock Resistance 1,000N (approximately 100G) Life Expectancy 10,000 operations minimum (at 6 operations per minute) Main terminal: M5 stud Terminal Style Auxiliary contact/ alarm contact: Quick-connect tab 0.110 terminal 1-pole/100g Weight 2-pole/200g 3-pole/300g Not suitable for branch circuit protection. USA: 800-262-IDEC Canada: 888-317-IDEC 893NRBM Series Circuit Breakers P art Numbering Guide NRBM series part numbers are composed of 6 part number codes. When ordering an NRBM series part, select one code from each category. Example: NRBM 1 1 11 F-30A-AA NRBM 1 1 11 F 30A AA j Poles k Internal l Auxiliary and m Inertia Delay n Rated Current o Time Delay Curve Circuit Alarm Contacts Part Number Codes: NRA Series Description Part Number Code Remarks 1-pole 1 All multiple pole circuit breakers are simultaneous throw/simultaneous break. All j No. of Poles 2-pole 2 levers are mechanically interlocked. 3-pole 3 k Internal Circuit Series current trip 1 Without 00 l Auxiliary and With auxiliary contact 11 Auxiliary contacts change state with lever and/or overload condition Alarm Contacts With alarm contact 21 Alarm contacts change state only with overload condition Without inertia delay Blank m Inertia Delay With inertia delay F 1A, 2A, 3A, 5A, 7.5A, 10A, 15A, n Rated Current Rated current (current trip) 20A, 25A, 30A, 40A, 50A AC curves AA, BA,MA o Time Delay Curve See page 897 for delay curves. DC curves AD, MD 1. For NRBM series time delay curves, see page 897. 2. For NRBM series dimensions, see page 899. 3. Not suitable for branch circuit protection. 4. UL recognized, applicable standard: UL1077, Supplementary Protectors. 894 www.idec.com Circuit Breakers Terminal Blocks Timers Relays & Sockets Display Lights Switches & Pilot Lights