Technical test evidence for SPRING switches, sockets and thermostats

Based on 2025 technical testing documentation

This page summarises the principal standards, laboratory test areas and measured results available in the 2025 technical documentation for selected SPRING product families. Numeric values are published only where the available documentation supports them and apply to the tested samples and model families identified in the corresponding technical records.

For an overview of the broader product quality approach, see SPRING Quality. For information about the brand, see About SPRING.

Testing as technical evidence

Electrical installation products must be evaluated as electrical and mechanical systems, not only as visible design objects. Depending on the product type, relevant tests examine insulation, dielectric strength, temperature rise, terminals, mechanical integrity, resistance to heat and fire, electromagnetic immunity, radio performance and restricted substances.

The 2025 SPRING documentation includes separate test programmes for electronic switches, 16 A socket outlets and thermostat model families. Wi-Fi thermostat variants also include radio and electromagnetic exposure assessments, while selected materials are covered by RoHS laboratory analysis.

Principal standards and test areas

CE marking and European conformity framework

The 2025 documentation for relevant SPRING switch, socket and thermostat model families is prepared against European electrical safety, EMC, radio equipment and restricted-substance requirements. The conformity packages referenced in the documentation include:

·        Low Voltage Directive 2014/35/EU

·        EMC Directive 2014/30/EU

·        Radio Equipment Directive 2014/53/EU for relevant Wi-Fi products

·        RoHS Directive 2011/65/EU, including amendment (EU) 2015/863

SPRING treats CE marking as a required conformity element. Product quality is better understood by examining the technical evidence behind that marking: test methods, measured values, immunity levels, limits and product behaviour during normal and abnormal operating scenarios.

Electronic and touch switches

A complete 2025 test cycle for a 250 V, 50/60 Hz, 10 A electronic switch model family was performed against EN 60669-1:2018 and EN IEC 60669-2-1:2022/A11:2022. The programme covers electrical safety, insulation, temperature, humidity, mechanical integrity, thermal resistance, abnormal conditions and EMC immunity.

Insulation resistance - 500 V DC

Measured result: 9999 MΩ. In one principal measurement configuration the required value was greater than 5 MΩ. Other measurement positions also remained well above their applicable minimum values. Result: PASS.

Dielectric strength - up to 2000 V AC

2000 V AC was applied between live poles and the enclosure and between individual poles and the remaining construction. A 750 V test voltage was used across the micro-gap switching point. No flashover or insulation breakdown was recorded. Result: PASS.

Humidity conditioning - 48 hours

The switches were conditioned for 48 hours at approximately 25 °C and about 93% relative humidity. After conditioning, no damage was identified and the product continued to meet the required insulation criteria. Result: PASS.

Temperature rise

During operation, the non-metallic enclosure temperature rise was approximately 19.3 K against a 70 K limit. Terminal measurements were approximately 40.4-49.4 K against a 55 K limit. After the normal-operation test, the enclosure temperature rise was about 18.7 K and one terminal measured 41.6 K, again below the applicable limit. Result: PASS.

Ball-pressure and thermal deformation

The PCB thermoplastic part was tested at 125 °C. The measured indentation was 0.4 mm against a maximum permitted diameter of 2.0 mm. Cover and switch-base parts tested at 70 °C each measured 0.7 mm against the same 2.0 mm limit. Results: PASS.

Mechanical integrity

An enclosure component was subjected to five impact events from a 100 mm drop height with no damage identified. Additional mechanical tests included impact testing and 40 N and 80 N panel-retention forces. Parts remained in place and live parts did not become accessible. Result: PASS.

Abnormal-condition evaluation

Electronic switch safety was also assessed by simulating faults in selected electronic components. Semiconductor components and the load-side circuit were short-circuited in defined test scenarios. In one scenario a protective element operated; in others the relevant circuits switched off or continued operating according to the prescribed test condition. The key safety criterion was that the fault must not create a hazardous state. The documented fault-condition scenarios were assessed as PASS.

Material flammability information

The 2025 switch component table identifies a plastic enclosure component with a UL94 V-0 flammability classification. This information is considered together with product-specific thermal tests such as ball-pressure and other applicable heat-resistance assessments, because different test methods evaluate different material behaviours.

EMC immunity - electronic switches

IEC 61000-4-2 - ESD: 4 kV contact discharge and 8 kV air discharge, with 10 positive and 10 negative discharges. The switch returned to normal condition and operated as intended. PASS.

IEC 61000-4-4 - EFT/Burst: 1 kV on supply lines and 0.5 kV on control lines. The product operated as intended after the test. PASS.

IEC 61000-4-3 - Radiated RF field: 3 V/m across 80-1000 MHz and 1400-2000 MHz. PASS.

IEC 61000-4-6 - Conducted RF immunity: 3 V RMS applied to supply and control lines. PASS.

IEC 61000-4-8 - Power-frequency magnetic field: 3 A/m at 50 Hz. PASS.

IEC 61000-4-11 - Voltage dips and interruptions: Short and longer voltage-dip and supply-interruption scenarios were assessed. Function was restored according to the applied criteria. PASS.

16 A socket outlets

A full 2025 safety test cycle for a 16 A, 250 V socket-outlet model family was performed according to IEC 60884-1:2022. Electronic socket constructions were additionally evaluated against EN 55032, EN 55035 and relevant EN 61000-series EMC requirements.

Terminals and conductor retention

The terminal design was assessed for copper-conductor connection, mechanical strength, corrosion and conductor retention. The minimum required conductor-space diameter was 2.0 mm, while the measured construction provided more than 3.0 mm - over 50% above the minimum dimensional requirement. During testing, the conductor did not slip out or break at the clamping point, and tightening/loosening cycles did not loosen the construction. Result: PASS.

Dielectric strength - 2000 V AC

The socket insulation system was tested at 2000 V AC between live poles and the enclosure and between individual poles. No breakdown or flashover was recorded. Insulation-resistance measurements also produced values in the hundreds of megaohms, above the applicable minimum limits. Result: PASS.

Breaking capacity and normal operation

IEC 60884-1 testing assessed the socket outlet's ability to connect and disconnect load safely. The test criteria did not permit a persistent electrical arc or damage that would prevent continued safe use. Breaking-capacity and normal-operation test groups were assessed as PASS.

Glow-wire - 750 °C

A 750 °C glow-wire test was applied to four insulating construction parts: the socket base, contact cover, front cover and protective shutter. No visible flame or persistent glowing was observed, glowing time was 0 s, and the paper below the specimen did not ignite. All four tested parts: PASS.

Full-load EMC testing

The electronic socket construction was assessed under full-load operating conditions rather than only as an unloaded product.

EN 61000-4-4 - EFT/Burst: ±1 kV at L, N, L-N, PE, L-PE, N-PE and L-N-PE points; ±0.5 kV on signal/control cable. The initial operating state did not change. PASS.

EN 61000-4-5 - Surge: L-N ±1 kV; L-PE and N-PE ±2 kV, with positive and negative polarity. The initial operating state did not change. PASS.

EN IEC 61000-4-11 - Voltage dips and interruptions: 0% residual voltage for 0.5 cycle, 70% residual voltage for 25 cycles, and 0% for 250 cycles were included in the programme. The applied test programme met the relevant criteria. PASS.

Conducted and radiated emissions, electrostatic discharge, RF immunity and voltage-fluctuation related test groups were also included in the documented EMC programme and assessed according to their applicable criteria.

Thermostats - extended 2025 test programme

The 2025 documentation substantially expands the technical evidence for SPRING thermostat model families. A 90-250 V AC, 50/60 Hz, up to 10 A family was assessed through separate electrical-safety, automatic-control, mechanical, thermal, PCB, EMC, Wi-Fi radio, electromagnetic-exposure and RoHS test packages.

Thermostat safety was assessed against EN 60730-1:2016+A1:2019+A2:2022 and EN IEC 62368-1:2024/A11:2024. Relevant Wi-Fi variants were additionally evaluated against RED-related standards ETSI EN 301 489-1, ETSI EN 301 489-17, ETSI EN 300 328 and EN 50663.

Electrical classification

The tested thermostat family is specified for AC 90-250 V, 50/60 Hz, 10 A. The construction is classified as Class II and IP20 for indoor installation.

Insulation and dielectric strength

Under EN 60730-1 testing, the documented minimum insulation-resistance requirement was 2 MΩ for basic insulation and 7 MΩ for reinforced insulation. The tested insulation categories met the requirements. Dielectric-strength tests following the specified conditioning and endurance procedures were also assessed as PASS.

Component-level temperature measurements

All documented temperature points remained below their applicable limits. Result: PASS.

Mechanical resistance

The complete thermostat was dropped three times from a height of 1000 mm. After each impact the documentation recorded “No damage, no hazard”. In a separate static-force test, 250 N was applied to the plastic enclosure; the enclosure remained intact without cracks or openings that could affect safety. Results: PASS.

PCB ageing - 1000 hours at 130 °C

Five PCB specimens were aged at 130 ±2 °C for 1000 hours. The same specimens were then conditioned for 48 hours at 35 ±1 °C and 90 ±5% relative humidity and subsequently retested for dielectric strength. Each specimen met the requirements. Three additional full environmental cycles were also completed, after which dielectric strength remained compliant. Result: PASS.

The documentation references PCB base-material assessment principles from IEC 60249 and IEC 60326 and coating requirements based on IEC 60664-3 principles.

Ball-pressure, glow-wire and flame-related tests

The thermostat PCB recorded a 0.7 mm indentation at 125 °C against a maximum limit below 2.0 mm. The plastic enclosure recorded 0.6 mm at 75 °C against a 2.0 mm limit. The PCB also passed a 550 °C glow-wire test without ignition or burning. Needle-flame requirements were additionally applied to zones associated with current-carrying construction. Results: PASS.

Wi-Fi thermostat radio and RED testing

The Wi-Fi radio section was evaluated against ETSI EN 300 328 V2.2.2. The programme covered RF output power, power spectral density, occupied channel bandwidth, unwanted emissions outside the band, spurious emissions, receiver spurious emissions and receiver blocking.

All applicable EN 300 328 test groups were assessed as PASS. In one maximum-power scenario, the measured value was approximately 12.63 dBm against a 20 dBm limit - more than 7 dB below the applied limit. The documentation also records margin to spurious-emission limits; for example, one horizontal-polarisation point measured -42.11 dBm against a -36 dBm limit, while another measured -55.33 dBm against a -30 dBm limit. Both results: PASS.

Thermostat EMC immunity

EN 61000-4-3 - Radiated RF field: 3 V/m, 80% AM, 1 kHz modulation, from 80 MHz to 1 GHz and from 1 GHz to 6 GHz. PASS.

EN 61000-4-4 - EFT/Burst: AC supply ±1 kV. PASS.

EN 61000-4-5 - Surge: AC supply L-N ±1 kV, five positive and five negative impulses according to the documented scenario. PASS.

EN 61000-4-6 - Conducted immunity: 0.15-80 MHz, 3 V RMS, 80% / 1 kHz amplitude modulation. PASS.

EN IEC 61000-4-11 - Voltage dips: 0% residual voltage for 0.5 and 1 cycle, 70% residual voltage for 25 cycles, and 0% for 250 cycles. Test package: PASS.

EN 50663 - electromagnetic exposure assessment

The Wi-Fi radio section was evaluated for human electromagnetic exposure according to EN 50663:2017. The highest reported EIRP value was 12.83 dBm, approximately 19.19 mW, and complied with the applied general-purpose equipment assessment criterion. Result: PASS.

RoHS laboratory control of restricted substances

A separate 2025 RoHS 2.0 conformity package was prepared for the tested thermostat model family according to Directive 2011/65/EU and amendment (EU) 2015/863. The documentation references IEC 62321-series methods including IEC 62321-3-1, IEC 62321-4, IEC 62321-5, IEC 62321-6, IEC 62321-7-1, IEC 62321-7-2 and IEC 62321-8.

The assessed restricted substances include lead, cadmium, mercury, hexavalent chromium, PBB, PBDE and the phthalates DBP, BBP, DEHP and DIBP. The documented tested samples met the applicable RoHS requirements. Result: PASS.

Mechanical switches - publication of test claims

Mechanical switches do not contain the same electronic assemblies as touch switches, but their reliability depends on the switching mechanism, contacts, conductor connection points, enclosure rigidity, installation geometry and external components.

SPRING applies the same product-development principles to mechanical switches: stable electrical contact, precise mechanism operation, safe insulation, reliable installation and a consistent design system. However, numeric laboratory results are publicly attributed only to product families for which the corresponding specific test documentation is available. We do not transfer numeric results from one product family to another without supporting documentation.

What do these tests mean in practical use?

How SPRING publishes technical evidence

·        Numeric results are assigned only to the tested product family or model group supported by the corresponding technical documentation.

·        Where a report provides a measured value and an applicable limit, both are shown whenever practical so that the result can be understood in context.

·        Passing one test does not automatically prove performance in a different test area; electrical, thermal, mechanical, EMC, radio and material assessments measure different properties.

·        Product revisions, components and functions may differ between SPRING product families, so applicable standards and test programmes may also differ.

·        Test documentation and product development are treated as an ongoing process. Customer, installer and warranty feedback may lead to changes in components, construction or future test requirements.

Technical note

Laboratory results apply to the tested samples and model families identified in the relevant technical documentation. Different SPRING products may use different constructions, functions and applicable standards. Numeric results should therefore not be generalised to a product family for which the corresponding test documentation is not available.