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  Thermal Switch Products
    Aerospace - Redmond (Defense & Space)
  Aerospace Redmond Links  >> Thermal Products Accelerometers MEMS Services & MEMS Foundry

650 Series Thermal Switch

TS650

DOWNLOAD DESCRIPTION

A low-cost way to meet thermal management requirements in the demanding space environment:

  • Gimbals
  • Battery
  • Transponders
  • Propulsion Components
  • Propulsion Lines

A few of the many platforms using this switch:

  • DSPS
  • Fleet SatCom
  • First generation Space Shuttle
  • First generation GPS (exclusive supplier)
  • LandSat
  • Pioneer IX
  • IRAS
  • Voyager I and II
  • Magellan

THERMAL SWITCHES exported from the United States must be done in accordance with the Export Administration Regulations (EAR) and/or the International Traffic in Arms Regulations (ITAR) as applicable.

Application Examples:

  • Electronics compartment temperature control
  • Cold plate temperature monitoring and control
  • Optics and instrumentation temperature control
  • Surface and strip heater control
  • Battery charge rate and heater control
  • Rocket motors and thrusters
  • Overheat protection
  • Electric motor pre-heater control
  • Hydraulic/pneumatic actuator freeze protection systems
  • Environmental control system limit indication and control

Features

  • All welded steel construction, plated
  • 500 cycles of run-in while monitoring contact resistance
  • Able to withstand high vibration and shock levels
  • Crisp, snap-action contact operation
  • Meets or exceeds requirements of MIL-PRF-24236
  • Small and lightweight, yet rugged
  • Internal cleanliness 100% verified by micro-particle analysis
  • Each switch serialized and shipped with individual test data sheet
  • Low contact resistance: 25 milliohms maximum
  • Hermetically sealed & backfilled with dry Nitrogen & 10% Helium tracer

Specifications for TS650 Thermal Switches
NOTE: The TS650 thermal switches have been qualified to the requirements of Military Specification MIL-PRF-24236, titled "Switches, Thermostatic, General Specification For", for Type I, Class 4 devices.
PERFORMANCE
Contact Arrangement: SPST
Contact Ratings: 5 amps resisitive load @ 28 VDC
2.0 amperes resistive load at 115 VAC RMS
1.0 amp inductive load (L/R 0.02) @ 28 VDC, 115 VAC RMS
1.0 ampere lamp load at 28 VDC/115 VAC RMS
Dielectric Withstanding Voltage: 1250 VAC RMS - terminals to case,
500 microamperes maximum leakage
Insulation Resistance: 500 megohms minimum. @ 500 VDC
Endurance: 100,000 cycles @ rated load
Ambient Temperature Range -100ºF to 300ºF
Wire (where applicable) MIL-S-22759/43
Environmental (MIL-STD-202)
Vibration (Sine): Meth. 204, 50g to 2000 Hz, 30g to 3000 Hz
Vibration (Random): Meth. 214, over 30g RMS, 20 to 2000 Hz
Moisture Resistance: Meth. 106, 240 hrs., 90-98% RH
& from +77° +149°F (+25°C to 65°C)
Hermetic Seal: Meth. 112, Cond. C, Procedure IV, 1.0 x 10-8 Atm, cc/sec max leak rate
Solderability: Meth. 208
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
Salt Spray: Meth. 101, Cond. B, 48 hours
Acceptance Test
TEST CRITERIA
Contact resistance monitored burn-in 500 cycles min., 100 megohms max
Particle impact noise detection (PIND) No particle noise
Calibration/setpoint 3 cycles
Creepage (ARC) duration 3 cycles <5msec, 600 VDC
Seal:
fine leak
gross leak

<1 X 10-8Atm. cc/sec
No bubbles
Contact resistance - 3 cycles 25 milliohms max (6 VDC. 0.1A)
Dielectric withstanding voltage - Terminals to case 1250 VAC RMS - terminals to case, 60 Hz
Insulation Resistance - Terminals to case 500 megohms min. @ 500 VDC
Weight Varies by configuration
Inspection of product Final visual

Tolerance Limits
Specified Temp Setpoint Range
Standard Setpoint Tolerance
°F (°C)
°F (°C)
-85 to 0 (-65 to -17.8)
±6 (3.3)
+1 to 250 (-17.2 to 121.1)
±5 (2.8)
251 to 302 (121.7 to 150)
±7 (3.9)

NOTE: The 650 Series thermal switches have been qualified to the requirements of Military Specification MIL-PRF-24236, titled "Switches, Thermostatic, General Specification For," for Type I, Class 4 devices.


Honeywell's new TS650 thermal switch is a value engineered product derived from the industry standard TS700 High Reliability product line. It is specifically designed to meet the growing demand for low cost space-qualified thermostats. By incorporating the same design features found on our TS500 and adapting processes established in our TS700, the TS650 offers a low cost way to meet thermal management requirements in the demanding space environment.

All switches are thoroughly tested, and meet or exceed the requirements set forth in MIL-PRF-24236/1, Type I, Class 4.

Upon testing and inspection, Honeywell serializes each switch and provides the customer with an acceptance test data sheet.

Off-the-shelf designs are available to save time and engineering resources by eliminating charges for customer specifications and non-recurring engineering (NRE).

No matter what your high-reliability application may be, Honeywell has the right solution for your system.


Contact Us, if you have questions, need more information,
or are interested in ordering 650 Series Thermal Switches.

 

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