3AT Series High Temperature Hermetic Position Switches
Switches
KLIXON® 3AT Series high temperature hermetic switches are snap-action devices that provide the reliable switching action in extremely harsh environments. These switches have a temperature range of -65 °F to +600 °F (-53.9 °C to +315 °C) and while switching 1 Amp resistive at 30VDC. Sensata has over 100 different switch packages in single and multi-pole configurations with actuation styles such as leaf, lever, pushbutton, plunger, roller, and toggle. KLIXON® 3AT Series switches provide indication of position in many different aerospace and defense applications. Typical applications include thrust reverse actuation systems as well as high temperature aircraft valves like fuel, engine start, fuel, environmental control system, anti-icing, bleed air, and avionics cooling valves.
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- Qualified per MIL-PRF-8805, Enclosure Symbol 5
- Hermetically sealed with dry nitrogen gas backfill
- Proven snap-action switching, reliable performance and long life
- Excellent shock and vibration resistance
- Switching up to 4 amps
- Optimal for low level circuits
- Temperature range between -275°F and 450°F
- Small, lightweight axis–symmetric design for robustness and reliability
- Single and multiple pole designs available
- Various mounting configurations for custom applications
- Sealed and unsealed plunger options
- Wide range of side plate designs for narrow width applications
- PMA Approvals for various commercial aircraft
- Customer approvals for space and military applications
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Specifications
| Device Type | High Temperature | ||
| Maximum Actuating Force (STP) | 20 oz | ||
| Minimum Release Force (STP) | 4 oz | ||
| Maximum Pretravel | 0.009” | ||
| Maximum Movement Differential | 0.003” | ||
| Minimum Overtravel | 0.002” | ||
| Overtravel Stop | No | ||
| Maximum Force on Actuator | 5 lb | ||
| Current Ratings in Amps (28VDC) |
Resistance | 1 | |
| Inductive | ½ | ||
| Lamp | ½ | ||
| Minimum Life @ Rated Load | 25K | ||
| Minimum Mechanical Life Cycles | 100K | ||
| Ambient Temperature Range | -65°F to 450°F (-53.8°C to 232.2°C) |
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| Dielectric Strength Terminal to Case Terminal to Terminal |
500 VRMS 500 VRMS |
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| Max Leakage | 1 x 10-8 Std. cc He/Sec @ 1 atmosphere differential | ||
| Shock Resistance | 200G, 6 ms sawtooth | ||
| Vibration Resistance | 65G, 10-2000Hz, .5DA or 65GTMS | ||
| Insulation Resistance @ 500VDC | 100 Megohms | ||
| Voltage Drop @ 1 amp | 0.12 | ||
| SEAL (MIL-S-8805) | Design Enclosure 5 | ||
| Backfill | Dry nitrogen with 10% helium | ||
