26 International Standards and Approvals Mark or Standard A11 AD11 AD12 A25 USA/Canada Underwriters Laboratories Europe International Electrical Commission (IEC) Recommendation EN 609472 IEC 609472 Switch approved Switch conforms to requirements 1Approved under the “Component Program” (UL-Recognized Industrial Component). File No. E60262, Category Control Number NRNT2 and NRNT8. 2Industrial switchgear is not required to bear a symbol but must conform to requirements. By referring to the specific specification on the product the manufacturer implies that these requirements have been met. 3Approved under the “Listing-Program”. File No. E35541, Guide No. NLRV and NLRV7. + + + + + + + + 1 3 Tightening torque of screws A A A A A A A A A A A A A A A DC Switching Capacity1 contacts in series: 1 2 3 4 5 6 8 Permissible voltage in volts Utilization category 24 48 72 96 120 144 192 DC-21A, DC-21B 48 96 144 192 240 288 384 Switching of resistive load 60 120 180 240 300 360 480 Time constant L/R≤1ms 110 220 330 440 550 660 – 220 440 660 – – – – Utilization category 24 48 72 96 120 144 192 DC-22A, DC-22B 48 96 144 192 240 288 384 Time constant L/R≤1ms 60 120 180 240 300 360 480 and inductive load 110 220 330 440 550 660 – f.e. shunt motors 220 440 660 – – – – Time constant L/R≤2,5ms Utilization category 24 48 72 96 120 144 192 DC-23A, DC-23B 48 96 144 192 240 288 384 Switching of highly 60 120 180 240 300 360 480 inductive loads 110 220 330 440 550 660 – f.e. series motors 220 440 660 – – – – Time constant L/R≤15ms Rated Thermal Current Ie 0,8 0,8 0,8 1,3 7 7 7 12 16 – – 21 14 – – 18 13 – – 17 6 – – 6 0,9 – – 1 14 – – 18 13 – – 17 12 – – 16 1,9 – – 2 0,3 – – 0,3 13 – – 16 12 – – 15 10 – – 14 1,5 – – 1,7 0,2 – – 0,2 Nm Ib-in Technical Data A Switches A11 AD11 AD12 A25 A11C AD11C AD12C A25C 1DC switching capacity applies to ON/OFF switches. Switching capacity for other configurations on request. < back to table of contents >
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