

Littelfuse CG7 series GDT is a miniature surface mount device with a 1kA 8/20μS surge rating. Its low insertion loss and thus low off-state capacitance makes it compatible with high bandwidth applications up to the GHz RF range. This GDT’s crow barring characteristic protects sensitive ICs from surges as defined in ITU K.20/21/45 Basic and Enhanced Recommendations, GR-1089-CORE first level lightning Port Type 1 and 3, and IEC 61000- 4-5 2nd edition. It is hermetically sealed using non-radioactive materials and is thus environmentally safe. Its 2.8mm diameter size makes it the world’s smallest two-electrode single chamber GDT.
- Up to 1kA Surge Capability in Minimal Footprint
- Ultra-low capacitance ( < 0.3 pF)
- Surface mount form factor
CG7 Parts
Filters
Part Number | Actions | VMIN Spark (V) | VNom Spark (V) | VMAX Spark (V) | Max Impulse Sparkover Voltage @ 100V/µs (V) | Capacitance (Co) (pF) | Impulse Discharge Current @8/20µs (kA) | DC Holdover Voltage (V) | Electrodes | Failsafe |
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Part Number | Actions | VMIN Spark (V) | VNom Spark (V) | VMAX Spark (V) | Max Impulse Sparkover Voltage @ 100V/µs (V) | Capacitance (Co) (pF) | Impulse Discharge Current @8/20µs (kA) | DC Holdover Voltage (V) | Electrodes | Failsafe | |
---|---|---|---|---|---|---|---|---|---|---|---|
96 | 120 | 144 | 120 | 0.5 | 1 | 80 | 2 | No | |||
120 | 150 | 180 | 150 | 0.5 | 1 | 80 | 2 | No | |||
160 | 200 | 240 | 200 | 0.5 | 1 | 135 | 2 | No | |||
184 | 230 | 276 | 230 | 0.5 | 1 | 135 | 2 | No | |||
200 | 250 | 300 | 250 | 0.5 | 1 | 135 | 2 | No | |||
280 | 350 | 420 | 350 | 0.5 | 1 | 135 | 2 | No | |||
320 | 400 | 480 | 400 | 0.5 | 1 | 135 | 2 | No | |||
376 | 470 | 564 | 470 | 0.5 | 1 | 135 | 2 | No | |||
60 | 75 | 90 | 75 | 0.5 | 1 | 50 | 2 | No | |||
72 | 90 | 108 | 90 | 0.5 | 1 | 50 | 2 | No |
CG7 Applications
- G.Fast Modems
- Cable Modems
- MoCA (Multimedia over Coax Alliance)
- EMTA (Embedded Multimedia Terminal Adapter)
- RF Connectors
- xDSL
- RJ 45 Connectors
Series: CG7 Resources

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Circuit Protection Selection Guide
Consult this guide to learn about circuit protection considerations and the solutions Littelfuse offers. Tables help match products with applications.