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What Is A Substitute Product For E5C4 Digital Temperature Controllers With Digital Settings And A Digital Display?

1.It depends on E5C4 model. Refer to the following table.
Control method Control output Discontinues model
(see note 1)
Substitute product
(see note 2)
None ON/OFF Relay E5C4-R20[] E5CS-R[]  
Voltage E5C4-Q20[] E5CS-Q[] See note 3
P (proportional) Relay E5C4-R40[] E5CS-R[]  
Voltage E5C4-Q40[] E5CS-Q[] See note 3


1.The [] in E5C4 model number indicates the type of input temperature sensor. It is "K" for the CA Thermocouple, "J" for the IC Thermocouple, and "P" for the Pt100 Resistance Thermometer.

2.The [] in E5CS Temperature Controllers model number indicates the type of input temperature sensor. It is "KJ" for a thermocouple, and "P" for a resistance thermometer. Select a model that is suitable for the temperature sensor being used or that is going to be used. Specify whether it is a type K or J thermocouple, or a JPt100 (old JIS) or Pt100 (new JIS) resistance thermometer using the Temperature Controller internal settings.

3.The control output voltage of E5C4 was 5 VDC, whereas it is 12 VDC for the substitute product. However, the voltage output is often connected to an Solid-state Relays, and the Solid-state Relays rated input voltage is often 5 to 24 VDC, therefore it could be used without modification. Nonetheless it is better to check the input conditions of the connected device.

2.General Comparison of E5C4 and E5CS

Compared item E5C4 E5CS Remarks
Power supply 100/110, 200/220 VAC 100 to 240 VAC  
Control method ON/OFF or P (proportional) ON/OFF or PID
(with proportional band automatic setting function)
See note 1
Control output
250 VAC, 3 A (R load) with switching capacity of 330 VA 250 VAC, 3 A (resistive load)  
sensor input
K: 0 to 399 °C
0 to 999 °C
K: 0 to 400 °C
0 to 999 °C
See note 2
J: 0 to 399 °C J: 0 to 400.0 °C  
JPt100: 0 to 99.9 °C JPt100: 0 to 99.9 °C See note 3
Front panel
48 x 48 DIN size 48 x 48 DIN size  
Plug-in (8-pin socket) Plug-in (8-pin socket) See note 4


1.Generally PID control has better control characteristics than P control, but if the desired control characteristics cannot be obtained, see whether E5CN-U Basic-type Digital Temperature Controllers can be used to obtain the desired control characteristics. E5CN-U can force the I and D constants to zero, whereas E5CS cannot.
An 11-pin connecting socket is required for E5CN-U, and the wiring will need to be changed.

2.For E5C4, the model depends on the temperature range and type of input temperature sensor, whereas for E5CS there are only two types, the thermocouple (KJ) and the thermometer (P). The temperature range and type of input temperature sensor can be specified using the Temperature Controller internal settings.

3.The Pt100 Resistance Thermometers are different for models before and after the 1989 JIS modifications. Models before the JIS modifications are the JPt100, and models after are the Pt100. E5C4 supports only JPt100, but E5CS supports both the JPt100 and JPt100. Specify which one you are using in the Temperature Controller settings.

4.External connections are compatible. There is no need to change the wiring.

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Created 2009-01-20
Modified 2009-01-20
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