Kumwell KSMH.SH series of surge protective devices has been developed to protect against the effects of induced voltages onto data, signal and communication circuits.
The circuit topology consists of a multi-stage protector providing both com-mon (longitudinal) mode and differential (transverse) mode protection.
Coarse protection is provided by a three terminal GDT while fine protection is provided using a high speed silicon avalanche diodes or metal oxide varistor stage. Care is taken to ensure coordination between these two stages without voltage or surge current blind spots occurring.
3 terminal GDT | KSMH.SH | ||||||||
Technical Data | 5V | 12V | 15V | 24V | 30V | 48V | 60V | 110V | |
Electrical Data | |||||||||
Number of protected pairs | 1 (2 conductors) | ||||||||
Nominal operating voltage (DC) | Un | 5V | 12V | 15V | 24V | 30V | 48V | 60V | 110V |
Max. continuous operating voltage (DC) | UC | 6V | 15V | 18V | 28V | 33V | 52V | 64V | 170V |
Rated load current at 25°C | IL | 1A | |||||||
Norminal discharge current (8/20µs) | In | 10kA | |||||||
Max. discharge current (8/20µs) | Imax | 20kA | |||||||
Lightning impulse current (10/350µs) | Iimp | 2.5kA | |||||||
Residual voltage at 5kA (8/20µs) | Ures (line-line) | < 22V | < 42V | < 48V | < 70V | < 80V | < 140V | < 160V | < 450V |
Rated spark overvoltage | (SH-PG) | 184-276V | |||||||
(a-b),(a,b-PG) | 7-10V | 16-21V | 20-24V | 30-36V | 35-43V | 55-68V | 67-85V | 184-264V | |
Response time | tA (SH-PG) | , 100 ns | |||||||
(a-b),(a,b-PG) | < 1 ns | ||||||||
Thermal protection | Yes | ||||||||
Insulation resistance of the protection | Riso (SH-PG) | > 1GΩ/100V | |||||||
(a-b),(a,b-PG) | ≥ 6kΩ | ≥ 15MΩ | ≥ 18MΩ | ≥ 28MΩ | ≥ 33MΩ | ≥ 52MΩ | ≥ 64MΩ | ≥ 170MΩ | |
Serial resistance | R | 1.6-2.0Ω | |||||||
Transverse capacitance | C (SH-PG) | 5pF | |||||||
(a-b),(a,b-PG) | 50pF | ||||||||
Limit frequency | fG | 30MHz | |||||||
Mechanical data | |||||||||
Temperature range | -40°C to + 80°C | ||||||||
Terminal cross section | Stranded to 4 mm2 | ||||||||
Mounting | 35mm DIN rail | ||||||||
Degree of protection | IP20 |