ST60 TO-5

ST60 To-5 Detector circuit overlay

ST60 To-5 Detector circuit overlay

ST60 TO-5 Thermopile Detector

ST60 TO-5 Thermopile Detector

A single-channel silicon-based thermopile provides lowest cost solutions in a small active area of 0.61mm x 0.61mm in a TO-5 package. Time constant of 18ms with Nitrogen encapsulation gas. Delivers a very low Temperature Coefficient of Responsivity of -0.04%/°C. This detector has a very short thermal shock response to ambient temperature change.

Excellent for non-contact temperature, fire suppression, horizon sensor, and gas analysis.

Low cost and small active area size with medium output.


  1. See Standard Windows and Filters (PDF) for list of optical filter options
  2. ST60R TO-5 version offers a low-cost (20% tolerance) poly-silicon resistor to be used as a PTC thermistor.
  3. Internal 30kΩ 5% NTC chip thermistor provides ambient package temperature measurement. See DC-4005 section of Thermistor Options (PDF).
  4. See Thermopile Configuration Table for more options.

For more detailed information see the datasheet ST60 TO-5 (PDF).

ST60 TO-5 Thermopile Detector Technical Specifications

Specifications apply at 23°C with KBr Window and Nitrogen encapsulating gas

Active Area size   .61 x .61   AA mm Hot junction size, per element.
Element Area   .37   A mm2  
Number of Junctions   80       Per element.
Number of Channels   1       Per detector package.
Output Voltage 80 110 130 Vs μV DC,  H=330μW/cm2 (3)
Signal-to-Noise Ratio 2,365 3,513 4,792 SNR √Hz DC, SNR=Vs/Vn
Responsivity 65.2 89.7 105.9 V/W DC, =Vs/HA  (2)
Resistance 45 60 70 R Detector element
Temperature Coefficient of   -.04     %/°C Best linear fit, 0° to 85°C (1)
Temperature Coefficient of  R   .11     %/°C Best fit, 0° to 85°C (1)
Noise Voltage 27.1 31.3 33.8 Vn nV/√Hz Vn2=4kTR
Noise Equivalent Power .26 .35 .52 NEP nW/√Hz DC,  NEP= VnHA/Vs (2)
Detectivity 1.17 1.75 2.38 D* 108√Hz/W DC,  D*=Vs/ VnH√A  (2)
Time Constant   18   Τ ms Chopped, -3dB point (1)
Field of View   72°/90°   FOV Degrees See Assembly Drawings for FOV Description.
Package Type   TO-5       Standard package hole size: Ø.150"
Operating Temperature -50   100 Ta °C  
ST60R Thermistor Options 24 30 36 RT PTC Poly-Silicon resistor on detector die.
ST60R Thermistor Temperature Coefficient of R .107 .11 .113   %/°C ΔR/(RΔT), Best fit, 0° to 85°C (1)

General Specifications: 
Flat spectral response from 100nm to > 100µm.  Linear signal output from 10-6 to 0.1W/cm2
Maximum incident radiance 0.1W/cm2 , damage threshold ≥ .5W/cm2
(1) Parameter is not 100% tested. 90% of all units meet these specifications.
A is detector area in cm2.
Test Conditions: 500K Blackbody source; Detector active surface 10cm from 0.6513cm Diameter Blackbody Aperture.

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