Siemens RDH Wall Mount Thermostat 1 Input, 1 Output Relay 3V dc PID Controller

RS Stock No.:: 245-172
Mfr. Part No.:: RDH100 / S55770-T377
Manufacturer:: Siemens

Siemens RDH Wall Mount Thermostat 1 Input, 1 Output Relay 3V dc PID Controller

Subtotal (1 unit)*

SGD112.41

(exc. GST)

SGD122.53

(inc. GST)

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In Stock

6 unit(s) ready to ship from another location
Plus 5 unit(s) shipping from 17 August 2026

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Units	Per unit
1 +	SGD112.41

*price indicative

RS Stock No.:: 245-172
Mfr. Part No.:: RDH100 / S55770-T377
Manufacturer:: Siemens

Specifications

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Siemens
	Product Type	Thermostat
	Output Type	Relay
	Number of Inputs	1
	Number of Outputs	1
	Maximum Current	5A
	Maximum Operating Temperature	+30°C
	Minimum Operating Temperature	+5°C
	Control Type	PID Controller
	Maximum Supply Voltage	3V dc
	Maximum Voltage	250V ac
	Display Type	LCD
	Width	120mm
	Standards/Approvals	RoHS
	Length	26.9mm
	IP Rating	IP20
	Mount Type	Wall Mount
	Series	RDH

	Select all
	Brand Siemens
	Product Type Thermostat
	Output Type Relay
	Number of Inputs 1
	Number of Outputs 1
	Maximum Current 5A
	Maximum Operating Temperature +30°C
	Minimum Operating Temperature +5°C
	Control Type PID Controller
	Maximum Supply Voltage 3V dc
	Maximum Voltage 250V ac
	Display Type LCD
	Width 120mm
	Standards/Approvals RoHS
	Length 26.9mm
	IP Rating IP20
	Mount Type Wall Mount
	Series RDH

COO (Country of Origin):: CN

Siemens RDH Series Thermostat, IP20, 5A Maximum Current - RDH100 / S55770-T377

This thermostat is a wall-mounted controller designed for precise temperature regulation in industrial and building automation environments. It presents setpoint and status information on an LCD and uses closed-loop control to manage a single relay output, making it suitable for managing simple heating or cooling loops within defined ambient ranges.

Features and Benefits:

• PID control delivers stable temperature regulation and reduced oscillation
• Relay output rated 5A enables direct switching of compatible loads
• Operates from 3V up to 250V AC for flexible supply arrangements
• Single input supports straightforward sensing and control tasks
• IP20 enclosure allows installation in protected indoor panels

Applications

• Suitable for HVAC zone temperature control panels
• Ideal for industrial process cabinets with simple on/off loads
• Used for temperature management in electrical enclosures
• Can be used for small heating device control in workshops

What ambient range can I expect for reliable operation?

The unit functions correctly between +5°C and +30°C, so ambient temperatures should be maintained within that span to ensure proper control behaviour.

How many outputs are available and what type are they?

There is one output provided, implemented as a relay suitable for switching up to 5A of load.

What mounting method is required for installation?

It is designed for wall mounting and should be fixed to a suitable indoor surface or panel.