Magnetic Contactor
Todays deals on Magnetic Contactor?
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Yaskawa Electric Magnetic Contactor HV-150AP2, HV150AP2, HV-15OAP2 $5,000.00 |
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CE15WN3 ser. B1 Cutler Hammer A.C. Magnetic Contactor 6-601 700A 600V 3P – NEW - $2,750.00 |
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OKYM 7 G 21 Stromberg Magnetic Contactor 900A 3P 600V Nema Size 7 $1,895.00 |
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S-K600 Mitsubishi Magnetic Contactor 800A 3P 600V 220-240V Coil $1,650.00 |
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ABB 445 Amp , 250 Hp@480 MAGNETIC CONTACTOR ,# CN-EH 300 $1,450.00 |
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ITE A103G12 NEW SIZE 5 120V MAGNETIC AC CONTACTOR $1,450.00 |
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ITE A103G48 NEW SIZE 5 480V MAGNETIC AC CONTACTOR $1,450.00 |
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GE 500Amp MAGNETIC CONTACTOR # CK95BE300 $1,350.00 |
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OKYM 6 G 21 Stromberg Magnetic Contactor 600A 3P 600V Nema Size 6 $1,295.00 |
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C400A-E Toshiba Magnetic Contactor 320A 3P 600V 300HP MAX 120V Coil – TESTED $1,250.00 |
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LC1FJ43 TELEMECANIQUE A.C. Magnetic Contactor 400A 1000V 3P – NEW IN BOX $1,279.00 |
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Furnas 44WB3EAJX251 Reversing Magnetic Contactor 24 Volt .50/.60 Hz Series B NEW $1,000.00 |
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Cutler Hammer Magnetic Contactor C10CN3A Size 1 120V Coil W/ Interlock (5309) $840.00 |
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OKYM 5 G 21 Stromberg Magnetic Contactor 350A 3P 600V Nema Size 5 $795.00 |
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8960 VO18 8960VO18 Square D Magnetic Contactor NEW L@@K $650.00 |
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EATON A202K1BAM Lighting Contactor Magnetic $649.00 |
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MITSUB. MAGNET.CONTACTOR, VALUTRAN TRANSFORMER,V REGUL $500.00 |
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NEW SURPLUS OEM ABB EH175C-1 EH175 EH-175120V AC coil MAGNETIC CONTACTOR $599.99 |
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NEW SURPLUS OEM ABB EH175C-2 EH175 EH-175 220/240V AC coil MAGNETIC CONTACTOR $599.99 |
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NEW SURPLUS OEM ABB EH175C-4 EH175 EH-175 460/480V AC coil MAGNETIC CONTACTOR $599.99 |
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NEW SURPLUS OEM ABB EH175C-F EH175-F EH-175 24V AC coil MAGNETIC CONTACTOR $599.99 |
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FUGI ELECTRIC MAGNETIC CONTACTOR SC-8N/UD 2NC4Q0# 100/120V COIL $499.00 |
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Westinghouse magnetic life line contactor 15825K4CNNB 50hp 220V 3 poles size 4 $500.00 |
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Clark Starter/Magnetic Contactor Size 3 X30U33 X3OU33 Type CY Form MA Bul 6030 $500.00 |
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FURNAS 40FP32AA MAGNETIC CONTACTOR SER 904 SIZE 2 NEW $499.98 |
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Benshaw Magnetic Contactor RSC 300 NEMA Size 5 NEW $450.00 |
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GE Magnetic Contactor CR305E002 NEW $471.20 |
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Square D 8502SDO2S AC Magnetic Contactor $379.00 |
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6- Yaskawa AC magnetic contactor HI-I5E2TUT NEW $416.00 |
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New Furnas 42DE35AG106 Definite Purpose Magnetic Contactor $430.00 |
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ABB NIB #EH175C-4 MAGNETIC 175A 3P 480V CONTACTOR $429.00 |
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8960 VO15 8960VO15 Square D Magnetic Contactor New L@@K $395.00 |
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Mitsubishi SD-N220 260A DC Operated Magnetic Contactor $399.99 |
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Furnas Definate Purpose Magnetic Contactor #207514407 (NEW) $399.99 |
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Magnetic contactor Fuji SC-7N $390.00 |
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Furnas 42FE15AG106GR 75V 2 Pole Open Enclosure Define Purpose Magnetic Contactor $399.99 |
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NEW SURPLUS FITS ABB EH175C-1 24V coil MAGNETIC CONTACTOR $399.99 |
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NEW FITS ABB EH175 EH 175 EH175C-1 EH175-2 EH175-4 EH175-F MAGNETIC CONTACTOR $399.00 |
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Siemens Definite Purpose Magnetic Contactor 42HF35AF $355.00 |
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OEM GE 200/300 LINE CONTACTOR STARTER MAGNETIC COIL 55-501463G003 SZ 4 *NEW* $350.00 |
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MITSUBSHI MAGNETIC CONTACTOR S-K125 *NEW* $350.00 |
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Square D 8502SBA5V89CFF1TX11 AC Magnetic Starter Contactor NEW $300.00 |
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Lot of 4 – Never Used SIZE 0 Magnetic Contactors 3 Phase ITE Vintage $295.00 |
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FURNAS 42DE15AF106 MAGNETIC CONTACTOR 2POLE NIB $325.00 |
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NIB Sq D AC Magnetic Contactor Nema 0 w/ Sq D 12/3 encl $299.00 |
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New Furnas 40EP32BA Magnetic Contactor 3 Pole NEMA 1 $320.00 |
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ABB EH160C-B (EH 160) 190A 150HP 3 pole Block Magnetic Contactor 208v Coil $316.99 |
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Mitsubishi S-K150U S-K150 AC200 S-K150-UL-AC200 Magnetic Contactor Relay $289.00 |
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NEW Furnas Magnetic Contactor / Definite Purpose 42HF35AA 262GA Series B 3 Pole $299.99 |
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NEW FUJI 2NC3HO # SC-6N/UD 3P 600V MAGNETIC CONTACTOR 200-240V AC OR DC COIL $299.99 |
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NEW FURNAS REVERSING CRAIN HOIST MAGNETIC CONTACTOR 44EA40AF 110V CONTROL $299.99 |
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Siemens Definite purpose magnetic contactor nema 1 NEW $299.90 |
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Square D Starter Magnetic Contactor 8810 SDO2 SDO SD02 $285.00 |
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Square D Magnetic Contactor $298.00 |
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New Furnas 42DE15AF Magnetic Contactor $295.00 |
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FUJI ELECTRIC 3NC3H0122 SC-N6 MAGNETIC CONTACTOR/STARTER NEW CONDITION IN BOX $295.00 |
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ITE Siemens Furnas 44WB3EAF Contactor Reversing Magnetic 3P NEW $290.00 |
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NEW Fuji SW-4NRM/2EUD Reversible Magnetic Switch/Contactor 2NC2T0 $289.99 |
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GE CR205E003 Magnetic Contactor Nema size 3 / 600 volt $275.00 |
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SQUARE D AC MAGNETIC CONTACTOR $250.00 |
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New AC Magnetic NEMA Size 0 Contactor 8502 SB05V02 $250.00 |
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Cutler Hammer C10DN3AB AC Magnetic Contactor NEMA Size 2 Open Type 3 pole $249.99 |
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FURNAS 42DE15AF106 MAGNETIC CONTACTOR 2POLE New In box $249.99 |
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CUTLER HAMMER C10DN3TB MAGNETIC CONTACTOR WITH INTERLOCK $249.99 |
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CUTLER-HAMMER C10DN3AB MAGNETIC CONTACTOR WITH INTERLOCK $249.99 |
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PRESTOLITE CONTACTOR, MAGNETIC PART # JBG4006A NSN: 6110-01-219-2691 $250.00 |
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YASKAWA 65A AC Magnetic Contactor H1-65-2E2 N.C. 1353-1 $250.00 |
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TOSHIBA MAGNETIC CONTACTOR MAIN CONTACT PARTS KIT TYPE 20-A $245.00 |
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TOSHIBA MAGNETIC CONTACTOR MAIN CONTACT PARTS KIT TYPE 25-A, CMK-25E $245.00 |
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FUJI ELECTRIC SRC3631-3 AC MAGNETIC CONTACTOR SRC36313 $250.00 |
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Yaskawa HI-35EGM HI35EGM HI 35EGM Magnetic Contactor 75A $199.00 |
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S-N35CX-AC24V Mitsubishi New In Box Magnetic Contactor S-N35CX-AC24 SN35CX $219.99 |
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NEMA Size 4 Toshiba Magnetic Contactor C220A-E 959S 220A 600v 3PH 120 ~ 240 coil $225.00 |
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Allen Bradley Magnetic Contactor 505-B0D 505B0D Ser C $225.00 |
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GE GENERAL ELECTRIC C-2000 COMBO MAGNETIC CONTACTOR 3 PH 230V 5HP 25A 600V $195.00 |
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SIEMENS DEFINITE PURPOSE MAGNETIC CONTACTOR $205.00 |
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Fugi Electric Magnetic Contactor SC-7N 150 12 Volt coil $199.99 |
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P&H Magnetic Contactor Model # 479U106-D51 $210.00 |
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S-K50UL-AC200V Mitsubishi New In Box Magnetic Contactor S-K50-AC200V $199.99 |
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S-K50UL-AC100V Mitsubishi New In Box Magnetic Contactor S-K50-AC100V $199.99 |
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MORRIS MAGNETIC CONTACTOR, NIB, OPEN ENCLOSURE $199.99 |
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GE Magnetic Contactor Reverser CR71VBA2AZA NOS New $199.99 |
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15HP 11KW Magnetic Contactor 3PH 50/60HZ 115V Coil $175.00 |
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Fuji Magnetic Contactor SC-N5 Standard Type NIB $202.99 |
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MOTOR ABB AC MAGNETIC CONTACTOR 120 V COIL A16-04-00 $199.99 |
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NEW FITS ABB EH90 MAGNETIC CONTACTOR AC COIL $199.99 |
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Square D Starter Magnetic Contactor 8810 SDO2 SDO SD02 $199.99 |
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Square D Starter Magnetic Contactor 8810 SDO2 SDO SD02 $199.99 |
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Square D Magnetic Contactor SC03 Class 8536 Form S Series A $199.00 |
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BENSHAW RSC-400 MAGNETIC CONTACTOR $199.00 |
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Square D Starter Magnetic Contactor Nema 0 8536SB02S A $185.00 |
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MITSUBISHI SD-N50 80Amp DC Operated Magnetic Contactor $145.00 |
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FURNAS 45DA20AF DEFINITIVE PURPOSE MAGNETIC CONTACTOR – 12 NEW PCS $180.00 |
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GE MAGNETIC REVERSER CONTACTOR CR71VAL3A2A, $195.00 |
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Allen bradley 500F-DOJ930 A Magnetic Starter Contactor $175.00 |
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Square D Magnetic Coil Nema 6 d-57250-243-53 contactor $175.00 |
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New AC Magnetic NEMA Size 0 Contactor 8502 SB02V02S $175.00 |
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FUJI ELECTRIC SC-7N (150) USED MAGNETIC CONTACTOR W/ THERMAL OVERLOAD RELAY $175.00 |
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FUJI MAGNETIC CONTACTOR $185.00 |
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# NIB MITSUBISHI MAGNETIC CONTACTOR S-N80 $179.99 |
Magnetic Contactor Questions
Solid State Triac Devices Replace Mechanical Relays in Power Switching Applications
What must be further understood is that mechanical relays, contactors, and switches operate in a random manner with respect to the electrical signal to be switched. Imagine a 60Hz AC power circuit. A mechanical relay, contactor or switch will interrupt this circuit in a random manner with respect to the AC power waveform passing through it. If the circuit is interrupted at a moment when the AC current flow is low, then little reverse voltage will result. If however, the circuit is interrupted at an instant when the AC current flow is high, then a corresponding high reverse voltage will result.
What meaning does this have for the electronic product design engineer? Mechanical circuits are, in fact, circuits that interrupt the flow of electricity in a ‘random’ manner – random, of course, with respect to the AC current flowing through that circuit at any particular instant. In a circuit that exhibits high inductance, such as a motor circuit, a solenoid circuit, or an electromagnetic circuit; reverse voltage can get very high. High voltages can damage and pit mechanical contacts. High voltages can cause noise and disturbance to other nearby sensitive circuitry.
Energy is stored in the electro-magnetic field that surrounds an inductive circuit. The stored energy is high when the corresponding current flow in that circuit is high. Upon circuit interruption, the flow of current through the circuit immediately stops. As current flow stops, the circuit’s electro-magnetic field collapses sending its unit of stored energy back into the wires from which it came. If the current is high, and the field is large, then a high voltage will be created. Mechanical relays, contactors and switches all will exhibit this type of behavior.
Solid-state triac devices may be used to interrupt the flow of electricity in a manner that is synchronous with the AC current waveform. Triacs are three-terminal, solid-state semiconductor devices which permit the flow of AC current through two terminals so long as the third, the trigger, is energized. Triacs have the additional, highly desirable property that electrical current flow stops when current flowing through the device is zero. This may seem obvious, but imagine the following: AC Current is flowing through your inductive circuit. You now wish to turn that circuit off. You do so by removing the trigger signal from your solid state triac device. The device continues to conduct electricity until the AC current waveform reaches zero, at which time no further AC current flows until the device is triggered again. The action of the solid state triac device ensures that the circuit is broken only when zero current is actually flowing.
Return to our inductive circuit. The solid state triac device ensures that the circuit’s energy flow is interrupted only when the AC current waveform reaches its instantaneous zero. The stored energy in the circuit’s electro-magnetic field will be at or near zero when the current flowing through that circuit is at or near zero. With no field energy, there will be nothing to cause the high voltages we previously observed in mechanical switching systems. The solid state triac device guarantees that circuit interruption will occur only at the zero-current instants thereby eliminating the worry of high voltage switching transients.
We at Orchid Technologies Engineering and Consulting, Inc. have successfully designed numerous custom high energy power switching circuits. These circuits are required to operate at high duty cycles and in close proximity to sensitive digital and analog circuitry. We have found that when designing with TRIAC and SCR devices we can eliminate most if not all switched circuit noise. Today’s solid state TRIAC devices are truly amazing. High current capacity at high switched voltages with very low leakage can be purchased in small packages at reasonable cost. Visit www.orchid-tech.com to learn more, or call Paul Nickelsberg, President and CTO of Orchid at 978-461-2000 for more information.
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