PTC2.5K-CH 2.5 A Temperature Controller, Chassis Mount

  • Drive ±2.5A of TEC or RH current
  • Single supply operation: +5 to +30 V
  • Small package: 3.0" x 3.2" x 1.1"
  • Remote enable input
  • Linear Stability: 0.0012°C
  • Selectable sensor bias current
  • Adjustable Current Limit
  • PI Control with "Smart Integrator"
  • Failsafe Setpoint default for D/A

From: $329.00

Bulk Pricing (6 - 14): $296.00

Contact Factory for High Volume 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 14 pieces. Contact factory for pricing. If ordering from or shipping to Australia, China, or Hong Kong, please contact your distributor.

The PTC-CH Series Chassis Mount Temperature Controllers deliver the precision performance and long-term reliability you expect from a Wavelength Electronics temperature controller. PTC-CH Series controllers are found in such diverse applications as particle and droplet measurement, manufacturing machine vision systems, biomolecular interaction analysis, and more. They are CE certified. A PDF version of the Declaration of Conformance is available.


PTC-CH controllers are available in different models so you can choose the one that best suits your application:

  • PTC2.5K-CH delivers up to ±2.5 A output current
  • PTC5K-CH for applications requiring up to ±5 A
  • PTC10K-CH drives up to ±10 A
  • PTC10K-SL can be tied to the 10 A driver to deliver a combined ±20 A output current

The PTC-CH controllers operate from a single power supply between 4.5 V and 30 V. The linear bipolar controller drives a Peltier thermoelectric cooler or a resistive heater, and the chassis-mount package integrates easily into OEM applications.

PTC-CH controllers interface with a variety of temperature sensors, and the bias current is adjustable in order to maximize controller sensitivity and stability for your application.

The compact chassis-mount design simplifies heatsinking and requires minimal space. PTC-CH controllers are quick to configure for your prototype project, and there are no surprises when it’s time to integrate the controller into the final design.

When controlling laser diode temperature, the LDMOUNT-5A, a 14-pin butterfly laser diode mount with integrated heat sinking, is available for simple connections between the PTC-CH and the laser.

If you are using a Quantum Cascade Laser or need low noise performance with a laser diode, we offer the PTC-CH nested in the QCL OEM drivers. Information is available here.


Built-in features make your product more robust to real-world operating conditions and minimize your electronics overhead:

  • If the optional remote temperature setpoint signal is lost, the controller defaults to a standard “safe” temperature setpoint (25ºC when a 10 kΩ thermistor is used). The safe temperature can be changed at the factory; call for details.
  • An on-board trimpot is used to set the output current limit to prevent over-driving the TEC, and helps protect your load from thermal runaway situations.
  • Proportional gain is easily adjusted with an on-board trimpot.
  • Low temperature coefficient design remains stable across a wide range of ambient conditions.

When used with Wavelength’s laser drivers, such as the PLD Series, these temperature controllers provide stable and reliable performance that sets your system apart from your competitors’ and keeps your customers satisfied.


Download the brochure to view a more detailed specification chart, and then call Wavelength’s sales engineers so we can help you choose the right temperature controller for your application.

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

Supply Range: +5 to +30 V
Temperature Control Output Current: up to ±2.5 A
Temperature Stability: 0.0012°C (10 kΩ thermistor at 25°C) over one hour
Stability across ambient: 0.0014°C (10 kΩ thermistor at 25°C) over an hour – Ideal for scanning applications

Setpoint vs. Actual Temperature Accuracy: less than 1 mV typical

-Adjustable output current limit
-Default Setpoint: If external setpoint drops below 0.3 V, an onboard default circuit sets it to 1 V. [25°C with a 10 kΩ thermistor]
-PI controller with “Smart Integrator” 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: 60 W
Chassis Mount Module size: 3.0″ x 3.2″ x 1.1″ (76 x 81 x 28 mm)

Top View of PTC2.5K-CH



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?
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?
FAQ1086: Do you have a chart indicating the relationship between the resistance of the setpoint and the current of the thermoelectric?
FAQ1109: When using a PTC Temperature Controller, if I set the temperature set point below approximately 0.3 V, the setpoint always reverts to approximately 1.0 V. What is happening and how can I implement a set point voltage below 0.3 V?
FAQ1110: What are the differences between the PTC Series Temperature Controllers and the MPT Series Temperature Controllers?
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?
FAQ1129: How do I modify the default remote SET T voltage in the PTCxx-CH?
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?
FAQ1171: How do I connect multiple drivers or controllers to a single power supply?


THERM-PSTThermal Paste$19
MULTI-HTSKMULTI-HTSK Multi-Product Heat Sink$57
HTSK-BRKTHeatsink Bracket for MULTI-HTSK and MULTI-HTSK-HI$35
WCB107WCB107 Power / TEC Cable for PTC Series$45
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
LDMOUNT-5ALDMOUNT 5A Butterfly Laser Diode Mount$599
WCB322WCB322 LDMOUNT Cable for the PTC-CH Series$86

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