Relay/Switch Component for Control Units and Thermostats

Product Specifications

Technical details and manufacturing context for Relay/Switch

Definition

A relay/switch is a critical component within control units and thermostats that functions as an electrically operated switch. It receives a low-power control signal from the thermostat's logic circuit and uses it to open or close a separate, higher-power circuit that controls heating, cooling, or fan systems. This isolation allows sensitive electronic controls to safely manage high-voltage or high-current loads.

In an electromechanical relay, a control current energizes an electromagnet, which moves an armature to physically open or close electrical contacts. In a solid-state relay, semiconductor components (like optocouplers and thyristors) perform the switching electronically without moving parts. Both types provide electrical isolation between the low-voltage control circuit and the high-voltage load circuit.

Typical parameters for such components include rated voltage (24–240 V AC/DC), rated current (5–30 A), contact resistance (≤50 mΩ initial), mechanical life (10^6–10^7 operations), electrical life (10^5–10^6 operations at rated load), operating temperature (-40 to 85 °C), IP rating (IP54–IP65), insulation resistance (≥100 MΩ at 500 V DC), dielectric strength (1500–2500 V AC for 1 min between coil and contacts), coil power consumption (0.5–2.5 W for DC coils), switching frequency (10–1200 ops/h), and weight (50–500 g). These values are reference ranges and must be confirmed for the specific model and application.

Relevant standards for verification include IEC 60947-5-1 for rated voltage and current, IEC 61810-2 for contact resistance, IEC 61810-1 for mechanical and electrical life, IEC 60068-2-1/2 for temperature testing, IEC 60529 for IP rating, and IEC 60255-5 for insulation resistance and dielectric strength. Always verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

In an electromechanical relay, a control current energizes an electromagnet, which moves an armature to physically open or close electrical contacts. In a solid-state relay, semiconductor components (like optocouplers and thyristors) perform the switching electronically without moving parts. Both types provide electrical isolation between the low-voltage control circuit and the high-voltage load circuit.

Common Materials

Copper, Plastic/Polymer, Steel/Iron, Silver Alloy (for contacts)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Voltage	24–240 V AC/DC	Operating range for coil and contactsIEC 60947-5-1
Rated Current	5–30 A	Continuous current carrying capacityIEC 60947-5-1
Contact Resistance	≤50 mΩ	Initial value, may increase with lifeIEC 61810-2
Mechanical Life	10^6–10^7 operations	No load operationsIEC 61810-1
Electrical Life	10^5–10^6 operations	At rated loadIEC 61810-1
Operating Temperature	-40–85 °C	Ambient temperature rangeIEC 60068-2-1/2
IP Rating	IP54–IP65	Protection against dust and waterIEC 60529
Insulation Resistance	≥100 MΩ	At 500 V DCIEC 60255-5
Dielectric Strength	1500–2500 V AC	1 min, between coil and contactsIEC 60255-5
Coil Power Consumption	0.5–2.5 W	For DC coilsIEC 61810-1
Switching Frequency	10–1200 ops/h	Maximum operations per hourIEC 61810-1
Weight	50–500 g	Depends on contact configuration

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

Coil Part
Electromagnet that generates a magnetic field when energized by the control signal, causing the armature to move.

Material: Copper wire, Steel core
Armature Part
Movable iron or steel part attracted by the electromagnet's field, physically moving to open or close the contacts.

Material: Steel/Iron
Contacts Part
Conductive points that make or break the electrical connection in the load circuit. Often made of materials resistant to arcing and wear.

Material: Silver alloy, Silver Cadmium Oxide, Silver Tin Oxide
Spring Part
Returns the armature to its default position when the coil is de-energized.

Material: Steel
Housing/Base Part
Protects internal components, provides mounting points, and ensures electrical insulation.

Material: Plastic (e.g., PBT, Nylon), Ceramic
Solid-State Switching Element Optional
Switches the load electronically with no moving contacts, on solid-state versions.

Applied To / Applications

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

Control Unit / Thermostat

View system integration details

Manufacturers of Relay/Switch

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

ZHEJIANG ETEK ELECTRICAL TECHNOLOGY CO.LTD.

Zhejiang, CN

CE VDE TUV CB

Also makes: EV Charging Controller, Charging Controller, Protection Circuit and 8 more

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

Listed there as: “EKA1-Samrt-Relay-Switch”
View source page ↗ etek-china.com · checked 2026-08-22

View profile Send enquiry

Wenzhou Xinkong Import & Export Co., Ltd.

Yueqing, Zhejiang, CN

Also makes: Circuit Breaker/Switch, Circuit Breaker, Smart Meter and 1 more

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

Listed there as: “Relay Switch”
View source page ↗ xinkelec.com · checked 2026-09-14

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 16 September 2026

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

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Inspection readiness

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Frequently Asked Questions

What is the difference between electromechanical and solid-state relays?

Electromechanical relays use an electromagnet to physically move contacts, while solid-state relays use semiconductor components like optocouplers and thyristors to switch electronically without moving parts. Both provide electrical isolation between control and load circuits.

What are typical rated voltage and current ranges for this component?

Typical rated voltage is 24–240 V AC/DC, and rated current is 5–30 A, per IEC 60947-5-1. These are reference ranges; the actual model must be confirmed with the manufacturer.

What standards apply to relay/switch components?

Relevant standards include IEC 60947-5-1 for voltage and current, IEC 61810-1 for life, IEC 61810-2 for contact resistance, IEC 60068-2-1/2 for temperature, IEC 60529 for IP rating, and IEC 60255-5 for insulation and dielectric strength.

How should I verify the suitability of a relay/switch for my application?

Check the model-specific datasheet for rated voltage, current, contact resistance, life, temperature range, IP rating, insulation resistance, dielectric strength, coil power, switching frequency, and weight. Confirm compliance with relevant standards with the legal manufacturer or supplier.

Data Basis

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

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

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pressure:	Atmospheric (not pressure-rated; for dry/low-pressure environments)
other spec:	Contact Rating: 1A to 30A typical, Switching Frequency: up to 1000 operations/hour (mechanical), Insulation Resistance: >100 MΩ
temperature:	-40°C to +85°C (operating range, varies by model)

Relay/Switch

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards