| Amps | Power Controller | Firing Mode | Electric Heating Element Type | Features | Agency Approvals |
| 35 to 2100A | ASPYRE DT® | Zero cross, single cycle, burst firing, phase angle, delayed triggering | Handles a wide range of load types including nichrome, medium and long waveform infrared lamps, moly (Kanthal® Super), transformers, silicon carbide, UV lamps and tungsten | Heater bakeout, integrated semiconductor fusing, communications (Modbus® RTU & TCP, Ethernet/IP™, Profibus, Profinet, USB), diagnostics, data logging |
*690VAC units not covered by UL® |
| 18 to 100A | DIN-A-MITE® | Burst fire, variable time base phase angle-fire3 | Nichrome™ wire, other | Four models meet power, budget and feature requirements. Same footprint as popular MDRs. Convenient DIN rail mounting. | UL®508 listed, C-UL®up to 100 amps and CE with proper filter |
| 150 to 1000A | QPAC | Burst fire, variable time base Phase-angle firing | Nichrome™ wire, other2 | Modular design incorporating plug-in cards for contactor, burst fire, variable time base, or phase angle. Quick delivery. | UL®508 listed and C-UL®up to 300A |
| 10 to 75A | SSR | VAC or VDC, burst fire contactor input | Nichrome™ wire | Low cost, requires heatsink. Heatsink and over-temperature protection recommended. Stocked for same day shipment. | UL®873 Recognized, CSA Certified and VDE 0805 |
| 18 to 50A | CZR | Contactor input | Nichrome™ wire | Compact electrically. Touch safe package. Convenient DIN-rail mounting. | UL®508 listed CSA Certified, VDE, CE |
| 65 to 250A | POWER SERIES | Burst fire, Variable time base Phase-angle firing3 | Nichrome™ wire, other2 | Microprocessor-based heater diagnostics. RS-232/485 communications. Heater bakeout feature. | UL®508 listed C-UL® |
(1) Includes heater replacement and lost production.
(2) Heating elements that change resistance value over time and temperature, i.e; silicon carbide, tungsten.
(3) Phase angle firing up to 65 amps. Single pahse only. Not CE approved.
Power Controller Characteristics
| Initial Cost | 3 Year Cost1 | Control Life | Heater Life | EMI Generation | Control | Response Rate | Options | |
|---|---|---|---|---|---|---|---|---|
| Electromechanical Relay And Contactor | ||||||||
| Low for low current | Highest | Limited (elec. & mech.) | Shortest | Yes, coil and contacts | Poor | Slowest | None | |
| Mercury Displacement Relay (MDR) | ||||||||
| Low for low to medium current | Medium | High | Good | Yes, coil and contact | Fair to good | Medium to fast | None | |
| Solid State Relay (SSR) | ||||||||
| Medium | Medium | Extended | Extended | Minimal with burst fire | Good | Fast | None | |
| SCR Solid State Contactor | ||||||||
| Medium | Low | Extended | Extended | Minimal | Good | Fast | None | |
| SCR Burst Firing | ||||||||
| High | Low | Extended | Longest | Minimal | Excellent | Fastest | None | |
| SCR Phase-Angle Firing | ||||||||
| High | Lowest | Extended | Longest | High | Excellent | Fastest | Current limit | |
| Saturable Core Reactor | ||||||||
| Highest | Low | Extended | Longest | Minimal | Very Good | Fast | Current limit |
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