MFG Part Number 387005672
PowerCycling PCX Series Thermoelectric Cooler
The PCX4-139-F1-1850-TA-RT-W6 is a high-performance thermoelectric cooler designed for thermal cycling between multiple temperature set points and is ideal for applications in healthcare among others, where fast temperature changes are required. The thermoelectric module is specially constructed to reduce the amount of stress induced on the thermoelectric elements during operation. It has a maximum Qc of 37.9 Watts when ΔT = 0 and a maximum ΔT of 73.6 °C at Qc = 0.
  • High thermal cycling reliability
  • Precise temperature control
  • Solid-state operation
  • Boosted performance with next-gen material
  • RoHS-compliant

You can interact with the Performance Curves below to estimate the cooling performance by entering the thermal and electrical operating conditions for your application.
Click the [Save Changes] button to create a Customized PDF Datasheet.
Please Note: Actual application performance will vary from calculated values based on actual thermal design characteristics.

Electrical and Thermal Performance

For maximum performance, be sure to orient the CONTROL side of the TEC against the application to be managed and the HEATSINK side against the heat sink or other heat rejection method. The CONTROL side is always opposite the side with lead attachments. Lead attachment is a passive heat loss and less impactful if located on the side that attaches to the heat exchanger.

Use the sliders, input fields and [UPDATE] button below to enter your application's electrical and thermal conditions. Use the Graph Y and X Axis buttons to display a variety of performance curves and use the Voltage/Current slider to choose the electrical operating point to display performance.
Click [Save Changes] button to save your results as a Customized PDF Datasheet.

Selected Operating Point
Cooling Power (Qc) = Watts
Current = Amps
Voltage = Volts
Power Supply = Watts
Power Dissipated (Qh) = Watts
Thot = °C
Optimum COP
Cooling Power (Qc) = 4.28 Watts
Current = 0.53 Amps
Voltage = 2.62 Volts
Power Supply = 1.39 Watts
COP = 3.08
Power Dissipated (Qh) = 5.66 Watts
Maximum Qc
Cooling Power (Qc) = 31.96 Watts
Current = 4.47 Amps
Voltage = 17.08 Volts
Power Supply = 76.32 Watts
COP = 0.42
Power Dissipated (Qh) = 108.27 Watts

Select Graph
Y - Axis

Select Graph
X - Axis

Imin: 0.2 A
Imax: 4.5 A

Vmin: 1.6 V
Vmax: 17.1 V
Click UPDATE to view changes in thermal operating conditions
Control Temp  
Ambient Temp  
Δ T  
Hot Side Thermal Resistance  
Cold Side Thermal Resistance  

Hot Side Temperature
27.0 °C
50.0 °C
80.0 °C
Qcmax (ΔT = 0)
37.9 Watts
40.8 Watts
43.8 Watts
ΔTmax (Qc = 0)
Imax (I @ ΔTmax)
4.0 Amps
3.9 Amps
3.8 Amps
Vmax (V @ ΔTmax)
16.3 Volts
18.1 Volts
20.4 Volts
Module Resistance
3.80 Ohms
4.28 Ohms
4.89 Ohms
Max Operating Temperature
120 °C
22.0 gram(s)

* Specifications reflect thermoelectric coefficients updated March 2020

Finishing Options
Flatness / Parallelism
Hot Face
Cold Face
Lead Length
3.800 ±0.025 mm
0.150 ± 0.0010 in
0.025 mm / 0.025 mm
0.001 in / 0.001 in
152.4 mm
6.00 in
Sealing Options
Temp Range
Translucent or White
-60 to 204°C
Non-corrosive, silicone adhesive
  1.  Max operating temperature: 120°C
  2.  Do not exceed Imax or Vmax when operating module
  3.  Reference assembly guidelines for recommended installation
  4.  Solder tinning also available on metallized ceramics

Any information furnished by Laird and its agents, whether in specifications, data sheets, product catalogues or otherwise, is believed to be (but is not warranted as being) accurate and reliable, is provided for information only and does not form part of any contract with Laird. All specifications are subject to change without notice. Laird assumes no responsibility and disclaims all liability for losses or damages resulting from use of or reliance on this information. All Laird products are sold subject to the Laird Terms and Conditions of sale (including Laird’s limited warranty) in effect from time to time, a copy of which will be furnished upon request.

© Copyright 2019-2023 Laird Thermal Systems, Inc. All rights reserved. Laird™, the Laird Ring Logo, and Laird Thermal Systems™ are trademarks or registered trademarks of Laird Limited or its subsidiaries.

Revision: 00 Date: 06-01-2022

Print Date: 10-01-2023