Protector 21A (Pack of 10)
£11.98 Inc.VAT | £9.98 Ex.VAT
Protector 21A (Pack of 10)
This 3 pole over-voltage gas discharge tube (GDT) with failsafe is designed to fit into 5B type protection magazines and protect telephone circuits.
Features
- Fits into standard 3 pole magazines (“protector mounting 5B”)
- Manufactured to standard 21A, with a lower spark over-voltage than previous versions
- Lower spark over-voltage offers circuits greater protection while still allowing plenty of headroom above standard telecoms voltage
Description
Protector 21A (Pack of 10)
This 3 pole over-voltage gas discharge tube (GDT) with failsafe is designed to fit into 5B type protection magazines and protect telephone circuits.
Features
- Fits into standard 3 pole magazines (“protector mounting 5B”)
- Manufactured to standard 21A, with a lower spark over-voltage than previous versions
- Lower spark over-voltage offers circuits greater protection while still allowing plenty of headroom above standard telecoms voltage
Specifications
- Totally non-radioactive over-voltage protection
- Very high current handling capabilities
- Designed to perform to ITU (formerly CCITT) K12
- DC sparkover voltage: 150 – 250V
- Minimum insulation resistance: 1000µΩ @ 100VDC
- Maximum impulse sparkover voltage: 450V @ 1KV/ µS
- Maximum capacitance: 1.5pF @ 1µHz bias Ø VDC line to ground
- Minimum handover voltage: 100V (using ITU K12)
Additional information
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