WTC3243HB 2.2 A Li+ Battery Temperature Controller

  • Operates with 3.6 V Lithium-Ion battery
  • Ultrastable PI control
  • Drive ±2.2A of TEC or RH current
  • Linear Stability: 0.0009°C
  • Small size: 1.3" x 1.28" x 0.313"
  • Heat and cool current limits
  • Supports Thermistors, RTDs, IC sensors
  • Single supply operation: +3.3 V to +8 V
  • Adjustable sensor bias current
  • 14 pin DIP PCB mount

From: $104.00

Bulk Pricing (2 - 9): $97.00

Contact Factory for OEM Pricing
Price adjustments will be reflected in the cart. For availability information please contact us. All prices are in US dollars and are subject to change without notice. Prices do not include shipping charges. An additional OEM discount applies on orders over 9 pieces. Contact factory for pricing. If ordering from or shipping to Australia, China, Hong Kong or Israel please contact your distributor.

This driver is not recommended for new designs.  It is being transitioned to a new version with more robust pins: WTC32ND-HB. A description of the changes and list of affected products can be found here.

The compact design of the WTC3243HB Temperature Controller achieves 0.0009°C temperature stability. This adaptation of the standard WTC3243 operates from 3.6 V, Lithium-Ion batteries. The sensor range is limited to 1.6 V (with 3.3 V power supply). Do not operate over 8 V input.

Its package can be integrated with a heatsink WHS302, thermal washer WTW002, and fans WXC303 (+5 V) or WXC304 (+12 V) for easy prototyping. The linear, PI control loop offers maximum stability while the bipolar current source has been designed for higher efficiency. The WTC3243HB drives up to 2.2 A for either Thermoelectrics (bipolar) or Resistive Heaters (unipolar).

The WTC3243 temperature controller is easily configured for any design. A circuit calculator tool speeds selection of external component values (see Design Tools tab). Virtually any type of temperature sensor can be used with it and a built in sensor bias current source simplifies use with resistive temperature sensors. The Proportional Gain (P) and Integrator Time Constant (I) are set by external resistors and can be modified to optimize temperature overshoot and stability.

Other features offer added flexibility. Independent heat and cool current limits are set by single resistors. An onboard reference voltage simplifies potentiometer control of the temperature setpoint. You can also choose to operate remotely with an external setpoint voltage. Monitor actual sensor voltage at pin 9.

The robust and reliable WTC3243HB is designed into handheld electro-optical systems, eye-safe atmospheric lidar, airborne instrumentation, Raman spectrometers and medical diagnostic equipment. The WTC is particularly suited to applications where temperature is scanned across ambient.

Wavelength provides the free LabVIEW Virtual Instrument executable file for use with the WTC3293 Evaluation Board. Click here to download. The executable VI also requires the 2017 LabVIEW Run-Time Engine, available for free download from the National Instruments website:, as well as the DAQmx Viewer also available for free from the NI website:

The source code for the LabVIEW Virtual Instrument module is available for free in case you wish to modify the program yourself. Alternately, Wavelength can customize the Virtual Instrument to suit your application. Contact a Sales Engineer for assistance.

WTC3243 vs. WHY5640:
– The WTC3243 incorporates remote voltage control and temperature monitor. The WHY5640 does not.
– The WTC3243 supports AD590 and LM335.
– The WHY5640 requires external circuits to operate anything other than resistive sensors.
– Two or more WHY5640s can be used together for more output current.
– If you do not need all the features of the WTC3243, the WHY5640 is a lower cost solution.
NOTE: The WHY5640 and WTC3243 do NOT have the same pin configuration.

Free, effective, and responsive technical support is available to simplify integration of Wavelength products into your OEM design. Standard product can be easily modified to meet your application requirements.

Supply Range: +3.3 to +8 V
Temperature Control Output Current: up to ±2.2 A
Temperature Stability: 0.0009°C (10 kΩ thermistor at 25°C) over one hour
Stability across ambient: 0.002°C (10 kΩ thermistor at 25°C) over an hour – Ideal for scanning applications

Setpoint vs. Actual Temperature Accuracy: 2 mV typical

-Heat and Cool Current Limits
-PI controller minimizes overshoot and time to temperature
-Compatible with multiple sensors
-Adjustable sensor bias current optimizes sensor feedback voltage
-Can operate with unipolar current for Resistive Heaters

Maximum Power Dissipation: 9 W
Heatspreader Temperature Rise: 30°C / W without external heatsinking

14 pin DIP PCB Mount size: 33 x 32 x 8 mm

WTC3243 Temperature Controller Pinout – Top View

WTC3243 diagram







NOTE: The WHY5640 and WTC3243 do NOT have the same pin configuration.

Related FAQs

FAQ1007: What limits the temperature control range of a temperature controller?
FAQ1009: Why won't my temperature controller settle my load to temperature?
FAQ1010: Why does it take so long to settle to the setpoint temperature?
FAQ1011: Why won't my load stabilize to your temperature controller specification?
FAQ1012: Why is my load heating when it should be cooling?
FAQ1014: What DC power supplies do you recommend to achieve the stability specifications listed in your manuals?
FAQ1015: Should I use a switching power supply for my application?
FAQ1016: How do I view and print your manuals on-line?
FAQ1017: An empty screen appears when I try opening a PDF manual. What does this mean?
FAQ1019: Which address do I use to remit payment or a purchase order?
FAQ1022: Where do I send my unit for repair or calibration?
FAQ1083: Battery power for Laser Drivers and Temperature Controllers - can the laser diode driver and temperature controller be powered by batteries directly?
FAQ1085: Do the temperature controllers always provide full current to the driven element (a TEC or Peltier device, or resistive heater) when the actual temperature does not equal the set point temperature?
FAQ1117: The temperature of my resistive heater is slow to stabilize and is not within specification.
FAQ1120: What does the Compliance Voltage specification in temperature controllers mean?
FAQ1128: What is the best way to wire a resistive heater to my temperature controller to gain compliance voltage?
FAQ1158: What software can I use for mechanical downloads?
FAQ1161: What are some important parameters to consider before purchasing a product?
FAQ1163: How does grounding the thermoelectric cooler cable on temperature controllers affect the noise level?
FAQ1169: At what temperature, and for how long can I solder the pins on the WLD, WTC, WTCP, and WHY products?
FAQ1170: Are the WLD, WTC, WTCP, and WHY products washable?
FAQ1171: How do I connect multiple drivers or controllers to a single power supply?


WEV300WEV300 Thermal Solution Kit$23
WEV301WEV301 Thermal Solution Kit with +5 V Fan$48
WEV302WEV302 Thermal Solution Kit with +12 V Fan$48


WTC3293Evaluation PCB for WTC3243 Temperature Controller$150
WTW002WTW002 Thermal Washer for Wxx Controllers$3
WHS302WHS302 Heatsink for WXX Controllers$15
WXC303WXC303 +5 V Fan$31
WXC304WXC304 +12 V Fan$31
WXC305WXC305 Screw Kit$6
TCS10K5TCS10K5 10 kΩ Thermistor (0.5x3mm) Sold in 5-packs$97
TCS610TCS610 10 kΩ Thermistor (2x3mm) Sold in 10-packs$97
TCS620TCS620 20 kΩ Thermistor (2x3mm) Sold in 10-packs$97
TCS650TCS650 50 kΩ Thermistor (2x3mm) Sold in 10-packs$97
TCS651TCS651 100 kΩ Thermistor (2x3mm) Sold in 10-packs$97

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