

Littelfuse CG6 series GDT is a miniature surface-mount device with a 3kA 8/20 surge rating. This ITU-T K.12 Class 1, Type 1 GDT provides protection against fast rising transients typically caused by nearby lightning events. 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, 3, and 5, and IEC 61000-4-5 2nd edition Level 5 and below. It is hermetically sealed using non-radioactive materials and is thus environmentally safe. Its 3.5mm diameter size makes it the world’s smallest two-electrode single chamber GDT available.
- Up to 3kA Surge Capability in Minimal Footprint
- Ultra-low capacitance (
- Surface mount form factor with square terminals
CG6 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 | |
---|---|---|---|---|---|---|---|---|---|---|---|
116 | 145 | 174 | 145 | 0.5 | 3 | 52 | 2 | No | |||
184 | 230 | 276 | 230 | 0.5 | 3 | 80 | 2 | No | |||
200 | 250 | 300 | 250 | 0.5 | 3 | 80 | 2 | No | |||
255 | 300 | 345 | 300 | 0.5 | 3 | 150 | 2 | No | |||
298 | 350 | 402 | 350 | 0.5 | 3 | 150 | 2 | No | |||
340 | 400 | 460 | 400 | 0.5 | 3 | 150 | 2 | No | |||
400 | 470 | 540 | 470 | 0.5 | 3 | 150 | 2 | No | |||
60 | 75 | 90 | 75 | 0.5 | 3 | 52 | 2 | No | |||
72 | 90 | 108 | 90 | 0.5 | 3 | 52 | 2 | No |
CG6 Applications
- G.Fast Modems
- Cable Modems
- MoCA (Multimedia over Coax Alliance)
- EMTA (Embedded Multimedia Terminal Adapter)
- RF Connectors
- xDSL
- Set Top Boxes
- RJ 45 Connectors
Series: CG6 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.