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Modules are manufactured to meet specific custom requirements including severe or unusual environments, high or low current applications, unusual temperature ranges and/or nonstandard differentials and setpoint tolerances.

Application Examples:

• Heated window temperature control
• Duct air temperature control
• Gyro/accelerometer temperature control
• Motor overheat protection
• Transmission overheat protection
• Pump motor overheat protection
• Hydraulic system temperature control and overheat warning
• Surface and strip heater control
• Battery charge rate control
• Anti-icing/de-icing controls

Features:

• Special terminal configurations and plating
• Overmolds and lead wires available
• Temperature ranges from -100°F (-73.3°C) to over +700°F (+371°C)
• Custom setpoint tolerances to ±2°F (±1°C)
• High pressure housings available
• Crisp SPST contact operation
• Contact pressure independent of bimetal disc
• Special electrical connectors
• High vibration and shock resistance
• All welded construction
• Hermetically sealed, backfilled with Nitrogen having a 10% Helium tracer
• Unique shapes assemblies, materials, and finishes designed to meet your custom requirements

Performance

Contact Arrangement:

SPST

Contact Ratings:

5 amps resistive load @ 28 VDC
2.0 amp resistive at 115 VAC RMS
1.0 amp lamp load at 28 VDC

Endurance:

100,000 cycles min. @ rated DC or AC loads

Dielectric Withstanding Voltage:

1500 AC RMS - terminals to case,
500 micro amperes maximum leakage

Insulation Resistance:

500 megohms minimum @ 500 VDC

Environmental (MIL-STD-202)

Vibration (Sine):

Meth. 204, 50g to 2000 Hz, 30g to 2000 Hz

Vibration (Random):

Meth. 214, over 60g RMS, 20 to 2000 Hz

Shock:

Meth. 213, 100g/6ms, 750g/0.5ms

thermal Shock:

Meth. 107, Cond. B, -85 to +257°F (-65°C to 125°C)

Acceleration:

Meth. 212, Cond. A, 30g

Moisture Resistance:

Meth. 106, 240 hrs., 90-98% RH
and from +75° +150°F (+23.8°C to 65.5°C)

Hermetic Seal:

Meth. 112, Cond. C, Procedure IV

Salt Spray:

Meth. 101, Cond. B, 48 hours

Note: SPST thermostats are available. Please contact factory for more information.

Specified Temp Setpoint Range ºF (ºC)

Standard Setpoint Tolerance ºF (ºC)

Differential RangeºF (ºC)

5 (3)

35 (19)

0 to 250 (-18 to 121)

±5 (3)

3 (2)

50 (28)

<250 to 300 (121 to 149)

±7 (4)

5 (3)

50 (28)

5 (3)

70 (39)

Honeywell's Custom Thermal Switch configurations utilize the basic 250 or 500 Series hermetically sealed switching mechanism. They are used in a diverse range of custom applications. Modules can be incorporated into a broad variety of configurations to meet unique customer requirements. Special features include

Thermal response of our custom switches can be tailored to meet specific application requirements.

All Honeywell Custom Thermal Switches are ideally suited to applications where exceptional reliability and consistent high quality are key requirements.

Contact Us, if you have questions, need more information,
or are interested in ordering Custom Thermal Switches.

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