Heat under load: Stable temperature with rated current less than 80°C for <50A, and not exceeding 120°C for >50A. Protects the ammeter and enables measurement of very large currents without needing an expensive new ammeter. Maintains ammeter measurement accuracy with precision levels: 0.5 for 2~4000A, and 1 for 5000~10000A. Compact, practical, and a valuable tool for current measurement. Features: - Heat under load: Stable temperature with rated current less than 80°C for <50A, and not exceeding 120°C for >50A. - Protects the ammeter and enables measurement of very large currents. - Easy to use, eliminating the need for a costly new ammeter. - Maintains ammeter measurement accuracy with precision levels: 0.5 for 2~4000A, and 1 for 5000~10000A. - Compact and practical, an excellent tool for current measurement. Specification: Current: 50A; 100A (Optional) Precision Level: 2~4000A, 0.5 level; 5000~10000A, 1 level. Temperature: -40 to +60°C, relative temperature ≤ 95% (35°C). Overload Performance: Rated current 120%, 2 hours Voltage Drop: 75mV Package List: 1 * Shunt Resistor