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Varistors & Surge Suppressors
HVP can provide MOVs for high power and high voltage AC & DC applications, these devices will extended the lifetime of the critical components.
- A Varistor (or voltage-dependant resistor) is a component that varies its electrical resistance as the applied voltage changes. At low voltage they have a high electrical resistance and at high voltage a low electrical resistance. In a system they are ideal for diverting surge voltages and spikes away from critical components.
- Metal Oxide Varistors (MOVs) are made from zinc oxide and other metal oxides placed between two metal plates or contacts. The functions and applications of these components are similar to standard varistors.
Surge Suppressor Assemblies:
• Capable of handling long pulses, 100-400 msec
• Fast response time 5-10 nanoseconds
• High body temp. operation, continuous 110°C
• Large mass device and consequently high energy
Lightning Surge Arrestor:
• MOV Based
• Distribution rated to 42kV
• Intermediate rated to 138kV
• Polymer Design
Bare MOV Discs:
• High surge rating on short pulses
• Fast response time pico-second range
• Low standby (leakage) current
• Board mountable, (Larger devices available)
Thermally Protected - Module MOVs:
• Quick thermal response and perfect circuit cut-off
• High surge current capability
• UL 1443 approved
Selenium Surge Suppressor:
• DC type polarized, non-polarized version available
• High energy, self-healing characteristics
Metal Oxide Varistors
| Max. Continuous Operating Voltage | Varistor Voltage | Energy Rating Max. Current | Max. Current | Max. Clamping | |
| Surface Mount MOVs | 8 - 300Vac (11 - 385Vdc) | 15 - 470 V | 0.4 - 25J | 0.2 - 1.2 kA | 28 - 775 V |
| Radial Lead MOVs | 11 - 1000Vac (14 - 1465Vdc) | 18 - 1800 V | 0.6 - 725J | 0.1 - 20 kA | 40 - 2970 V |
| Encapsulated MOVs | 130 - 660Vac (175 - 850Vdc) | 200 - 1050 V | 370 - 1250J | 40 kA | 320 - 1740 V |
| Tab Lead MOVs | 130 - 1000Vac (170 - 1350Vdc) | 205 - 4230 V | 100 - 3500J | 10 - 70 kA | 325 - 2800 V |
| Bare MOV Discs | 130 - 1400Vac (170 - 1750Vdc) | 200 - 2200 V | 310 - 7000J | 10 - 70 kA | 340 - 3580 V |
| Case MOVs | 130 - 2800Vac (170 - 3500Vdc) | 205 - 4700 V | 210 - 7000J | 25 - 100 kA | 340 - 7400 V |
Silicon Carbide Varistors
| Max. Continuous Operating Voltage | Max. Continuous Power Rating | Max. Discharge Capacity | Varistor Voltage Max. | |
| Bare Disc Surge Suppressors | 150 - 300 VAC (135 - 270 VDC) | 1.5 - 10 W | 275 - 22500 J | 210 - 660 V |
| Surge Suppressor Assemblies | 6 - 600 VDC | 3 - 240 W | 1.1 - 540 kJ |
Surge Arrestors
| Rated Voltage | Max Voltage at 1mA | Current Impulse Withstand Capacity | Max. Residual Voltage Ratio | |
| Bare Disc Surge Arrestors | 0.28 - 6 V | 0.6 - 8.4 V | 40 - 100 kA | 1.69 - 1.88 kV |
| Lightning Surge Arrestor | 3 - 36 kV | 4.3 - 51.6 V | 65 - 100 kA | 8.8 - 122.4 kV |
Thermally Protected Suppressors
| Maximum Continuous Voltage | Surge Current | Response Time | |
| DIN Rail Class II Surge Arrestor | 150 - 690 VAC (200 - 910 VDC) | 20 - 50 kA | 25 nS |
| Module MOVs | 150 - 690 VAC (200 - 910 VDC) | 22 - 50 kA | 25 nS |
| Power Line SPDs | - | 25 - 300 kA | - |
| Radial Lead MOVs | 50 - 680 VAC (65 - 895 VDC) | 10 - 15 kA | 25 nS |
Selenium Surge Suppressors
| Maximum DC Voltage | Maximum Clamping Voltage | Peak Discharge Current | |
| SD Series | 90 - 675 VDC | 240 - 1800 V | 3 - 904 A |