PTC Heat Conductors

PTC Heat Conductor Features

LCH-A to I image

Taiwan KLC's PTC Heat Conductors comes in various sizes and mounting options for ease of installation. Utilizing PTC's self-regulating characteristics, PTC Heat Conductors is a safe and energy-saving choice for your product design. Some of its typical applications includes, PC mother board heating, steam ironing, moisture control, frost protection and any medium to low heating products.  PTC heat conductors of LCH-H~K series are effective natural convection heaters, with aluminum extrusion fins allowing effective heat transfer into ambient air without the use of fan. Nevertheless, types LCH-I and K can also be used as air heaters (please select LCH-H ~LCH-K tab below for more information).

  • High heating efficiency
  • Low electricity consumption
  • Low cost
  • Very low to no noise level (compared with fan heater)
  • Available in wide voltage range (12V~600V)
  • High reliability with self-regulating characteristic
  • Heating power(W) and self-regulating function is in correlation to the ambient environment (temperature, air flow, air volume)
  • Most suitable for heating, heat retaining and constant temperature maintaining, with almost unlimited applications!

Our NEW Multi-Stage Heating PTC Heat Conductor provides higher flexibility in temperature control, by allowing two or three temperature settings in a single heating unit. Multistage heating unit can be designed into all LCH types (LCH-A to LCH-I) PTC heat conductors. For more information on this compact multi-stage heater, please select the "Multi-Stage Heating" tab below.

LCH-A to I image

PTC Heat Conductor Applications

PC Mother Board protection, sustain constant temperature under deficient condition to protect electronic elements from malfunction. Suitable for medical assistance, beauty treatment, stream ironing, moisture control, electronic heating, health treatment, air purifier etc. for all medium to low heating products. 

PTC Heat Conductor General Specifications

  • Power : 2W ~ 2000W
  • Surface Temperature : 60°C ~ 240°C
  • Voltage :AC/DC 5V~500V
  • Standard Lead Wire :22AWG 210mm (black)

PTC Heat Conductor Application Notes

  • The power(wattage) of PTC heat conductor increases with the heat dissipation rate. When heat is retained under condition with no airflow (low heat dissipation), the surface temperature of the PTC conductor will reach curie temperature (Ct), the power(W) will then decrease dramatically. On the other hand, when the heat dissipation rate is high (under the condition of low ambient temperature, underwater or large airflow), this will cause the surface temperature of PTC heat conductor to decrease, the power of PTC heat conductor will then increase to regulate the temperature.

  • The wattage(power) in the MAX POWER is the power(W) under the most effective heat transmission condition based on surface temperature of 240°C. The General heat transmission power is 5%~80% of the maximum power specified. For indirect heating of water, the power may be just 15%~60% of the maximum power.  The power(W) varies in relation to the contact material, heat sink, heat dissipation area, ambient temperature, airflow and product application.

  • Customized models can be designed according to customers' requirement (tooling cost may apply).

  • Calculation of Relative Power for other Surface Temperatures:
    The Maximum Power listed in the Specifications tables is for PTC Heat Conductors with surface temperature of 240°C (220°C for some LCH types). If the required surface temperature is 120°C, the relative power of the Max. Power(W) can be calculated using the formula below:
    Temperature Rise(@240°C) = 240°C - ambient temperature = 240°C - 20°C = 220°C
    Temperature Rise(@120°C) = 120°C - ambient temperature = 120°C - 20°C = 100°C
    Relative Power(@120°C)  = Max. Power from table x Temp. Rise(120°C)/Temp. Rise(240°C)
                                             = 120W x 100°C/220°C = 54.5W
    Relative Power is approximately 54.5W for 120°C

Please click on the  TABs  below for more information and product specifications.

Dimensions and Wire Options

Available Standard Model Dimensions of PTC Heat Conductors

LCH-A Type PTC Heat Conductor large
LCH-A type
LCH-B Type PTC Heat Conductor large
LCH-B type
LCH-C Type PTC Heat Conductor large
LCH-C type
LCH-D Type PTC Heat Conductor large
LCH-D type
LCH-E Type PTC Heat Conductor large
LCH-E type
LCH-F Type PTC Heat Conductor large
LCH-F type
LCH-G Type PTC Heat Conductor large
LCH-G type (customize example)
LCH-H Type PTC Heat Conductor large
LCH-H type
LCH-I Type PTC Heat Conductor large
LCH-I type
LCH-J Type PTC Heat Conductor large
LCH-J type (customize example)
LCH-K Type PTC Heat Conductor large
LCH-K type (customize example)
* Figures in BLACK are current available dimensions. Texts in RED are customizable ranges.

PTC Heat Conductor  Wire Output & Design Options:

The height, width, length, fin design, fixture hole location, lead wire exit location and wire terminals of PTC Heat Conductors can be customized according to customer requirements (may require tooling charge).  If not specified, PTC heat conductor with standard one-sided wire outlet without terminals will be provided. Below are some of our typical design options for each PTC Heat Conductor type.

One-Sided Wire Outlet
Two-Sided Wire Outlet
Wire with Connector
Wire with Female Crimp
and Fixture Holes
(if require fixture holes,
please specify measurements)
Wire with Female Crimp
and Fixture Holes
(if require fixture holes,
please specify measurements)
PTC Conductor with
Customized Fixture Holes
(if require fixture holes,
please specify measurements)
PTC Conductor with
Stainless Steel Fixture Plate
Three-Phase Heating
Wire Outlet (NEW!)

Part Numbering

Part Numbering

Notes on Part Numbering and Specification Table
*Voltage Selection
Select the Voltage within 20% range from the voltage list.
For example, use 2 if the required voltage is 240V (within 20% of 220V)
^Tube Length Selection
  • The Tube Length does not apply to LCH-A type. For LCH-A type, enter the number of PTC chips instead.
  • Tube lengths can be customized for large quantities.
#Max Power Selection
  • The wattage(power) in the MAX POWER list is the power(W) under the most effective heat transmission condition based on surface temperature of 240°C. The actual wattage(power) is subject to change according to different designs and applications. The actual wattage(power)is usually 5%~80% of the MAX POWER.
  • Power (MIN) is measured when the power(W) has stabilized 5~6 minutes after heating under the condition of no ambient airflow(very low heat dissipation rate).
**Surface Temperature Selection
The Surface Temperature refers to the surface temperature of the aluminum tubes.
Please refer to the "Surface Temperature and Related Heater Models" table for more details. 
^^Wire Length Selection
The standard wire length is 210mm. Do not need to specify wire length if using our standard length.
Surface Temperature and Related Heater Models
Surface temperature and related PTC heat conductor types
**If the temperature range above does not meet your requirement, you can also refer to our Ultra-Thin Flexible Heater range for wider temperature range.


Standard Models (LCH-A to LCH-G)- 220V


Standard Models (LCH-A to LCH-G) - 110V


Standard Models (LCH-A to LCH-G) - 72V


Standard Models (LCH-A to LCH-G) - 48V


Standard Models (LCH-A to LCH-G) - 24V


Standard Models (LCH-A to LCH-G) - 12V

Multi-Stage Heating(NEW)

Multi-Stage Heating PTC Heat Conductor (LCH-AS ~ LCH-IS Types)

The new multi-stage heating PTC Heat Conductor allows for high, medium and low power (temperature) settings in a single heater. Effectively increase the life span of the heater and provides flexibility in your product design. The PTC heat conductor is separated into two zones (per customer requirement), by powering each zone independently or at the same time would allow for three choices of temperature settings (High, Medium and Low) in a single heat conductor.

  • Higher Flexibility
  • Power Saving
  • Longer Product Life Span
  • Compact
Settings Wire Connection
Low Temperature
(Zone 1 heated)
Wire connection for low temperature PTC heat conductor
Medium Temperature
(Zone 2 heated)
Wire connection for medium temperature PTC heat conductor
High Temperature
(Both zone1 and zone 2 are heated)
Wire connection for high temperature PTC heat conductor

Installation (Circuit Connection)

To install simply connect the three lead wires to a control switch as per circuit diagram below.
(H1 represents Zone1; H2 & H3 represents Zone2)
Three stage temperature ciruit diagram

LCH-H ~ LCH-K types

PTC Natural Convection Heater and Air Heater

LCH-H to LCH-K type PTC heat conductors are great natural convection heaters due to its rugged aluminum extrusion allowing it to effectively transfer heat into ambient air without the use of fan. The use of PTC's unique self regulating characteristic and fin extrusion makes LCH-H~K series of PTC heat conductor a safe and quiet choice for your heater design. Nevertheless, installation of fan to the side of LCH-I and LCH-K types is also an option for quicker heat up of ambient air.


Items LCH-H Series LCH-IA Series LCH-IB Series
Image LCH-H Type drawing LCH-IA Series 2D drawings LCH-IA Series 2D drawings
Wattage Range 6W~2000W
Max. Surface Temperature 220'C
Voltage Range AC/DC 12V~600V 
Dimension 39.5 x 19.5 x L 55 x 28 x L 70 x 28.5 x L
Material Aluminum AL6061/6063
Optional (Fan) LCH-I with fan
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