Power Relay for Temperature Control Modules

Product Specifications

Technical details and manufacturing context for Power Relay

Definition

A power relay is a critical component within a Temperature Control Module that acts as an electrically operated switch. It isolates low-power control signals from high-power heating/cooling circuits, enabling safe and reliable activation of temperature regulation elements based on controller commands. The relay is designed for industrial electrical equipment manufacturing and is classified as a component. Its primary function is to bridge the gap between low-voltage control electronics and high-current loads such as heating elements, compressors, or fans. The relay operates on a coil voltage range of 9–36 V DC, with contact current ratings from 10–30 A and switching voltages up to 250–277 V AC. Coil power consumption typically ranges from 0.9 to 1.2 W. Contact resistance is ≤100 mΩ at 6 V DC and 1 A, while insulation resistance is ≥1000 MΩ between coil and contacts at 500 V DC. Dielectric strength is 2500–5000 V AC for 1 minute. The operating temperature range is -40 to 85 °C. Mechanical life is ≥10^7 operations, and electrical life is ≥10^5 operations at rated resistive load. The relay has an IP rating of IP54–IP65 per IEC 60529, and typical weight is 30–50 g. Materials include copper for coil and contacts, plastic for housing, and steel for core and spring. These specifications are reference ranges; actual values must be confirmed with the manufacturer for specific models and applications. The relay is not a standalone product but a component intended for integration into larger systems. It is essential to verify model-specific parameters and standards with the legal manufacturer or supplier before procurement.

Working Principle

When a low-voltage control signal from the temperature controller is applied to the relay coil, it generates a magnetic field that moves an armature. This mechanical action closes or opens high-current contacts, thereby connecting or disconnecting power to heating elements, compressors, or fans to achieve the desired temperature setpoint. The relay ensures electrical isolation between the control circuit and the power circuit, protecting sensitive electronics from high voltages and currents. The coil's magnetic field overcomes the spring tension, pulling the armature to change contact state. When the control signal is removed, the spring returns the armature to its original position, restoring the initial contact state. This switching mechanism allows precise on/off control of high-power loads based on controller commands.

Common Materials

Copper (coil and contacts), Plastic (housing), Steel (core and spring)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Coil Voltage	9–36 V DC	Standard control voltage range
Contact Current Rating	10–30 A	Maximum continuous current per contact
Contact Voltage Rating	250–277 V AC	Maximum switching voltage
Coil Power Consumption	0.9–1.2 W	Typical coil power at nominal voltage
Contact Resistance	≤100 mΩ	Initial resistance at 6 V DC, 1 A
Insulation Resistance	≥1000 MΩ	Between coil and contacts at 500 V DC
Dielectric Strength	2500–5000 V AC	Between coil and contacts for 1 minute
Operating Temperature	-40–85 °C	Ambient temperature range
Mechanical Life	≥10^7 operations	No load switching cycles
Electrical Life	≥10^5 operations	At rated resistive load
IP Rating	IP54–IP65	Protection against dust and waterIEC 60529
Weight	30–50 g	Typical unit weight

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Electromagnetic Coil
Converts electrical control signal into magnetic force to actuate the switch mechanism

Material: Copper wire
Armature Part
Movable iron component that responds to magnetic field from the coil

Material: Steel
Contacts Part
Conductive surfaces that make or break the high-power circuit

Material: Silver alloy or copper
Spring Part
Returns armature to default position when coil is de-energized

Material: Steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Temperature Control Module

View system integration details

Manufacturers of Power Relay

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

HONGFA

Xiamen, Fujian, CN

Also makes: AC-DC Converter, Electromagnetic Relay, Power Supply Module and 9 more

Listed on the company's own website · profile compiled by CNFX from public sources

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Frequently Asked Questions

What is the typical coil voltage range for this power relay?

The coil voltage range is 9–36 V DC. This is a standard control voltage range, but you should confirm the exact rating for the specific model you intend to use.

What are the contact current and voltage ratings?

The contact current rating is 10–30 A maximum continuous current per contact, and the maximum switching voltage is 250–277 V AC. These are reference ranges; verify with the manufacturer for your application.

What is the IP rating and what does it mean?

The IP rating is IP54–IP65 per IEC 60529, indicating protection against dust and water. IP54 offers limited dust protection and water splashes, while IP65 provides dust-tight and water jet protection. Confirm the exact rating for your model.

What is the mechanical and electrical life expectancy?

Mechanical life is ≥10^7 operations (no load), and electrical life is ≥10^5 operations at rated resistive load. These are typical values; actual life depends on operating conditions and load type.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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current:	Up to 30A
voltage:	Up to 600V AC/DC
temperature:	-40°C to +85°C
dielectric strength:	≥2500 VAC
switching frequency:	Up to 10 Hz
insulation resistance:	≥100 MΩ

Power Relay

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards