Sidactor Protection Thyristor Products Page 58 SIDACtor Protection Thyristor Products

SIDACtor Protection Thyristors 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/17 UL 497C requirements cover protectors for use on coaxial cable circuits. This standard covers construction and performance requirements. The "Construction" section covers the following requirements: General Corrosion Protection Field-wiring Connections Components Spacing Enclosures The "Performance" section covers the following requirements: General I 2 t Limiting Abnormal Sustained Current Component Temperature Test Breakdown Voltage Measurement Impulse Spark-over Voltage Measurement Limited Short-circuit Test High Current Ground Path Test Cable Shield Fuse Test Endurance Conditioning Test Induced Low Current Test Distortion Test Flame Test Impact Test (Polymeric Enclosures) Jarring Test Water Spray Test Leakage Current Test Dielectric Voltage-withstand Test Ultraviolet Light and Water Exposure Tensile Strength and Elongation Tests Air Oven Aging Ozone Exposure UL 497C Construction and Performance Requirements 1. Strike Voltage Breakdown Test -Protectors are required to break down within 25% of the manufacturer's specified breakdown range but no higher than 750 V at 2 kV/s rise time. 2. Endurance Conditioning -Protectors are subjected to 500 impulse cycles. Each cycle is a 1000 V peak, 10 A, 10x1000 s pulse. Pulses are applied in one polarity at 10-second intervals and then repeated in the opposite polarity. Then, 100 cycles of 1000 V peak, 100 A, 10x1000 s pulse are applied to three new protectors. Finally, two cycles of 1000 V peak, 5000 A, 8x20 s pulse are applied to three new protectors, with a rest period of one minute between surges. 3. Variable Ambient Conditioning -Protectors must comply with the strike voltage requirements after being subjected to an ambient temperature of 25 C for four hours and again after being subjected to an ambient temperature of 90 C for an additional four hours. 4. Discharge Test -Protectors must comply with strike voltage requirements after being subjected to a discharge of 1000 V, 100 10 V/s, 10 A impulse. Performance Requirements Specific to SIDACtor Devices Regulatory Requirements (continued)

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