IEC 60695-11-10 Horizontal & Vertical Flame Test Chamber (50 W)

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IEC 60695-11-10 50W Horizontal Vertical Flame Tester | UnitedTest

UnitedTest manufactures IEC 60695-11-10 fire hazard testing machines with 50W test flame, evaluating burning behaviour of electrotechnical materials, measuring linear burning rate and self-extinguishing properties for solid and cellular materials.

IEC 60695-11-10 Fire hazard testing - Part 11-10: Test flames; 50 W horizontal and vertical flame test methods

IEC 60695-11-10 defines small‑scale laboratory procedures to compare the burning behaviour of materials used in electrotechnical products, using bar specimens exposed to a 50 W nominal small flame ignition source. The standard covers two test approaches: Method A for linear burning rate measurement and Method B to assess self‑extinguishing characteristics. It applies to solid and cellular materials with apparent density greater than 250 kg/m³ tested following ISO 845 requirements. Widely used for electrical component material qualification and flammability screening, this test verifies flame response for insulating polymers and plastic parts in electrical appliances.

UnitedTest supplies precision IEC 60695-11-10 test equipment to meet laboratory compliance and quality control demands.

Test principle

A rectangular bar‑shaped specimen is clamped at one end, with its free end exposed to a standardized 50 W flame.

Method A (horizontal): Specimen is held horizontally. Measure linear burning rate (mm/min) to characterize flame spread speed along the bar.
Method B (vertical): Specimen is held vertically. Measure afterflame time t₁, t₂, afterglow time t₃, observe molten flaming drips and whether the sample burns up to the holding clamp, to assess self‑extinguishing capacity of material.

Important note: Test results from small‑scale lab tests cannot alone represent real‑world full‑scale fire risk, and shall be only one component of complete fire‑hazard assessment.

IEC 60695-11-10 50 W Horizontal

Test methods (A and B)

Method A: Horizontal burning test (HB)

Purpose: Determine linear burning rate for horizontally‑mounted specimens.
Flame application: Burner inclined at ~45°, apply flame for maximum 30 s to specimen free end. Mark reference lines at 25 mm and 100 mm from flame‑exposed end.
Classification output: HB, HB40, HB75 (HB75 will be removed in future revisions) according to burning‑rate thresholds

Method B: Vertical burning test

Purpose: Evaluate self‑extinguishing performance of vertically‑mounted specimens.
Flame application: Apply flame twice for 10 s each time to bottom edge of vertical bar. After each flame removal, record afterflame and afterglow durations, and check whether molten drips ignite cotton‑pad indicator underneath.
Classification output: V‑0, V‑1, V‑2, based on individual and total afterflame time, afterflame + afterglow time, cotton‑pad ignition and "burned‑to‑clamp" criteria.

Test Specimen Information

Dimensions: Bar‑shaped specimen: 125 mm ± 5 mm × 13.0 mm ± 0.5 mm. Thickness shall cover the minimum and maximum thickness for intended classification; max thickness ≤ 13 mm; corner radius ≤ 1.3 mm, edges smoothed. Preferred thickness: 0.1 mm, 0.2 mm, 0.4 mm, 0.75 mm, 1.5 mm, 3.0 mm, 6.0 mm, 12.0 mm.
Quantity: Minimum 6 specimens for Method A; 20 specimens for Method B (two conditioning groups each with 10 pieces).
Fabrication: Produced by injection‑moulding, compression‑moulding or cutting from finished product parts; cut surfaces must be sanded smooth and cleaned of debris.

Test equipment required for IEC 60695-11-10 50 W Horizontal & Vertical Flame Test

Recommend UntiedTest UL94 Horizontal & Vertical Flame Tester, consist of below:

Draught‑free test chamber / fume hood	Minimum internal volume of 0.5 m³, dark inner surfaces, background light < 20 lx; exhaust fan shall be OFF during testing, turned on after test to vent toxic combustion gas.
50 W laboratory burner	Must comply with companion standard IEC 60695‑11‑4.
Timing device	resolution ≤ 0.5 s.
Other tools	Adjustable support stand with specimen‑holding clamps. Millimetre‑graduated measuring scale. 20‑mesh steel wire gauze (for horizontal test). Air‑circulating oven: maintain 70 °C ± 2 °C for thermal conditioning. Desiccator for post‑oven cooling of specimens and pre‑drying cotton pads. Micrometer: high‑resolution for measuring specimen thickness. 100 %‑absorbent‑cotton pads (indicator for flaming drips in vertical test). HB flexible‑specimen auxiliary support fixture for sagging horizontal samples

Key Test Parameters

Flame‑application parameters

Standardized nominal thermal power: 50 W flame.
Method A: burner angle 45°, flame application time max 30 s.
Method B: two‑times flame exposure, each for 10 s ± 0.5 s; burner nozzle tip 10 mm ± 1 mm below specimen bottom edge.
Vertical test geometry: specimen bottom end sits 300 mm ± 10 mm above cotton‑pad indicator.

Classification thresholds

Method A:

HB40: burning‑rate ≤ 40 mm/min.
HB75: burning‑rate ≤ 75 mm/min.

Method B (V‑0/V‑1/V‑2):

V‑0: individual afterflame ≤ 10 s; total afterflame for 5‑specimen set ≤ 50 s; t₂+t₃ ≤ 30 s; no burn‑to‑clamp; cotton pad not ignited.
V‑1: individual afterflame ≤ 30 s; total afterflame ≤ 250 s; t₂+t₃ ≤ 60 s; no burn‑to‑clamp; cotton pad not ignited.
V‑2: same timing limits as V‑1; no burn‑to‑clamp; cotton‑pad ignition by flaming drips is permitted.

Test procedure of IEC 60695-11-10 50 W Horizontal & Vertical Flame Test

Method A (Horizontal burning)

Condition specimens to “as‑received” status.
Mark 25 mm and 100 mm reference lines on each bar.
Mount specimen horizontally with transverse axis inclined at 45° ± 2°, place wire gauze 10 mm underneath; install auxiliary HB fixture if sample sags.
Stabilize calibrated 50 W burner at 45° angle.
Apply flame to free end for up to 30 s. Start timer when flame front crosses 25 mm mark.
Record burning time and burned length; calculate linear burning‑rate: v = (L/t) × 60 (unit: mm/min).
Evaluate classification (HB / HB40 / HB75). Retest according to failure criteria as required.
Fill out test report.

Method B (Vertical burning)

Prepare two specimen groups: “as‑received” conditioned set and oven‑conditioned set (5 pieces per group). Condition cotton pads in desiccator.
Clamp specimen vertically (clamp grips top 6 mm of bar). Position cotton‑pad indicator 300 mm below sample bottom.
Stabilize calibrated 50 W vertical burner.
First flame application for 10 s, withdraw burner; record first afterflame time t₁, observe drips and cotton‑pad ignition.
After flame extinguishes, apply flame for second 10 s; withdraw burner, record t₂ (second afterflame), t₃ (afterglow), t₂+t₃, drips, cotton‑pad ignition and “burned‑to‑clamp”.
Repeat for all 10 specimens (5 as‑received, 5 oven‑conditioned). Compute total afterflame time t_f for each 5‑specimen set.
Assign classification V‑0 / V‑1 / V‑2 or “cannot classify”. Run retest sets when required by standard rules.
Compile full test report with all observed data and classification with corresponding thickness

Industry Application Fields

Electrical and electronic industry: Primary use for plastics and non‑metallic insulating components inside electrotechnical equipment, household appliances, power supplies, connectors.
Material‑selection pre‑screening: Compare relative flammability of candidate raw materials before product design.
Quality assurance: Verify consistency of incoming plastic batches, monitor manufacturing changes (formula, pigment, filler).
Support end‑product safety certification: Provide material‑flammability data to satisfy requirements of IEC product‑safety standards.

IEC 60695-11-10 50 W Horizontal

Related Test Standard:

IEC 60695‑11‑10	50 W horizontal & vertical flame test methods
UL 94	Widely‑used North‑American standard for plastic flammability (HB horizontal burn; V‑0/V‑1/V‑2 vertical burn). Its test setup and evaluation criteria are highly analogous to ISO 1210 / IEC 60695‑11‑10.
ASTM D635	US horizontal‑burning rate test for plastics (similar to ISO 1210 Method A).
ISO 1210	Plastics; determination of the burning behaviour of horizontal and vertical specimens in contact with a small-flame ignition source
IEC 60695‑11‑20	500 W flame (5V classifications), the "bigger flame" counterpart.
ISO 9773	vertical burning of thin flexible films/sheets (for materials that shrink away, which ISO 1210 cannot handle).
ISO 9772	cellular plastics, horizontal small‑flame burning.
ASTM D3801	vertical, 20 mm flame
ASTM D4804	thin flexible
GB/T 2408 (China), AS/NZS 60695.11.10, JIS C 60695‑11‑10, UNE‑EN 60695‑11‑10 — national adoptions of IEC 60695‑11‑10.

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UL94 horizontal vertical flame tester, standard UL94 flammability test chamber for plastic, rubber, foam, electronic material fire resistance test, supports HB/V0/V1/V2/5VA/5VB/VTM/HBF test grades, PLC touch screen automatic timing, 50W & 500W dual burner, 1-year full warranty, factory direct export

Oxygen Index Apparatus/LOI tester (Limitation Oxygen Index tester) is widely used to measure burning performance of plastics, rubber, fiber, foam,,film etc., The technique measures the minimum percentage of oxygen in the test atmosphere that is required to marginally support combustion.

Q1: What is IEC 60695‑11‑10 test used for?

A1: It is an IEC basic‑safety fire‑hazard screening test, using a 50 W nominal flame source. It includes Method A (horizontal burning for linear burning rate, HB ratings) and Method B (vertical burning for self‑extinguishing performance, V‑0/V‑1/V‑2 ratings). It evaluates burning behaviour for plastics & non‑metallic materials for electrical‑electronic products, for material pre‑selection, incoming‑quality‑control and safety‑compliance documentation.

Q2: Why is IEC 60695‑11‑10 test important for materials?

A2: Electrical/electronic products may catch fire from component over‑heating or faults. This lab‑scale test gives standardized flammability data:

Compare different polymer grades, flame‑retardant formulations objectively.
Detect flammability drift from raw‑material batch variation or manufacturing changes.
Generate classification evidence to satisfy product‑safety‑standard requirements.
Provides input data for complete fire‑hazard assessment.

Important: This test does NOT represent full‑scale real‑world fire risk, only small‑specimen reaction‑to‑fire performance under controlled lab conditions.

Q3: What is the difference between IEC 60695‑11‑10 and UL 94?

A3: They are highly harmonized, share HB / V‑0 / V‑1 / V‑2 rating logic, but have small procedural differences in conditioning, retest rules and documentation requirements. IEC 60695‑11‑10 is an international IEC standard for electrotechnical products; UL 94 is US‑originated standard widely used in North‑American certification. One test machine can often run both standards if fully configured. UnitedTest supplies IEC‑compliant horizontal‑vertical flame testers supporting both IEC 60695‑11‑10 and UL 94 test workflows.

Q4: Difference between IEC 60695‑11‑10 (50 W) vs IEC 60695‑11‑20 (500 W)?

A4:

IEC 60695‑11‑10 uses 50 W flame, yields HB / V‑0 / V‑1 / V‑2.
IEC 60695‑11‑20 uses 500 W higher‑energy flame, yields 5VA /5VB ratings.

Results are not interchangeable. Higher‑energy 500 W test represents more severe fire‑exposure conditions for end‑products.

Q5: What specimen size do IEC 60695‑11‑10 tests require?

A5: Standard bar specimen dimension: 125 mm ±5 mm × 13.0 mm ±0.5 mm. Thickness shall cover min/max thickness for your intended rating (max ≤ 13 mm). Minimum sample quantity: 6 pieces for Method A; 20 pieces for Method B (two conditioning groups, 10 each). Edges must be smooth; corner radius ≤ 1.3 mm.

Q6: Can IEC 60695‑11‑10 test be used for all plastics?

A6: No. ✅ Applicable: solid / cellular materials with apparent density > 250 kg/m³ (ISO 845).

❌ Not suitable:

Low‑density foam ≤ 250 kg/m³ → use ISO 9772.
Thin flexible specimens that shrink away from flame without ignition → use ISO 9773.
It cannot test finished end‑products, only material bar specimens.

Q7: How often do I need to verify / calibrate the 50 W flame burner?

A7: Per standard: flame confirmation shall be performed:

When gas supply is changed;
When apparatus / parameters are modified;
In case of dispute;
At least once per month. Allow minimum 5 min stabilization time for burner before starting tests.

Q8: If one specimen fails in a set, do I need retesting?

A8: Yes. If only one sample fails in one group of specimens, you must run a complete new replicate set. Special retest trigger ranges apply for total‑afterflame‑time: total afterflame 51‑55 s for V‑0; 251‑255 s for V‑1 / V‑2 will trigger mandatory retest. All specimens in second set must fully satisfy classification criteria.

Q9: What does “burned to the holding clamp” mean in vertical test?

A9: After cooling, wipe soot residue and inspect 2 mm below clamp line. Only combustion/pyrolysis damage caused by propagating flame front counts. Simple melting/deformation or direct flame impingement shall NOT be judged as burned‑to‑clamp. If judged “burned‑to‑clamp”, material cannot achieve V‑0 / V‑1 / V‑2 classification.

Q10: Does passing V‑0 rating mean my material is “fire‑proof”?

A10: Absolutely not. V‑0 only means the specimen self‑extinguishes under strict lab‑scale 50 W flame exposure. It is still combustible under larger‑scale fire conditions. Real‑world fire‑hazard assessment also considers heat‑release rate, smoke, toxic gas, part geometry, ventilation and ignition‑source magnitude.

Q11: What industries perform IEC 60695‑11‑10 testing?

A11: Electrical & electronics, home‑appliance, power‑component, connector, automotive electronics, plastic‑material manufacturer, third‑party‑testing‑laboratories, quality‑control departments, R&D for polymer & flame‑retardant materials.

Q12: Where can I buy IEC 60695‑11‑10 compliant horizontal‑vertical flame test equipment?

A12: UnitedTest is professional manufacturer of horizontal‑vertical 50 W flame‑test machines complying with IEC 60695‑11‑10 & IEC 60695‑11‑4, supporting both Method A horizontal‑burning test and Method B vertical‑burning test, also compatible with UL 94 test procedures. We supply complete test‑chamber, burner fixtures, accessories and after‑sales support for material‑testing‑laboratories worldwide.

Q13: Why choose IEC 60695‑11‑10 50W Horizontal Vertical Flame Tester from UnitedTest?

A13: UnitedTest is professional manufacturer of IEC 60695‑11‑10 50 W horizontal vertical flame tester. Complies with IEC 60695‑11‑4, performs HB / V‑0 / V‑1 / V‑2 flammability tests for plastics & non‑metallic materials for electrical‑electronic products. Also supports UL 94 test workflow for material‑QA, R&D and third‑party‑laboratories. Global supply & technical support available.

UnitedTest designs and manufactures IEC 60695‑11‑10:2013 horizontal‑vertical flame‑test equipment, also known as 50 W flame flammability tester for plastics and non‑metallic materials used in electrotechnical products. Our test apparatus strictly follows IEC 60695‑11‑10 and companion standard IEC 60695‑11‑4, implementing both Method A horizontal‑burning test and Method B vertical‑burning test.

This lab‑scale fire‑hazard‑testing machine evaluates linear burning rate (HB, HB40, HB75 classification) and self‑extinguishing performance (V‑0, V‑1, V‑2 classification). It is widely used in plastic‑material‑R&D, incoming‑quality‑control, product‑safety‑validation and third‑party‑testing‑laboratories for electrical‑electronic components, household‑appliance parts, connectors and polymer‑formulation development.

Our IEC 60695‑11‑10 flame‑test‑chamber includes draught‑free enclosed test cabinet, calibrated 50 W laboratory burner, precision timing device (≤ 0.5 s resolution), adjustable specimen‑clamp assemblies, HB flexible‑specimen support fixture, 20‑mesh steel wire gauze, cotton‑pad holder and complete set of accessories. Besides IEC 60695‑11‑10 test, our equipment can also run standard UL 94 plastic flammability test with minor setting adjustment.

Key machine features:

Full compliance with IEC 60695‑11‑10 & IEC 60695‑11‑4 standard requirements.
Integrated draught‑free test chamber ≥ 0.5 m³ with safety exhaust‑vent system.
Accurate 50 W flame‑burner system, easy for monthly flame‑verification.
Supports complete test‑procedure: specimen marking, flame‑application timing, observation for afterflame, afterglow, molten flaming drips and cotton‑pad ignition.
Capture critical parameters: burning rate, t₁ / t₂ afterflame‑time, t₃ afterglow‑time, total afterflame‑time, burn‑to‑clamp judgement.
Suitable for solid and cellular materials with apparent density above 250 kg/m³.

UnitedTest delivers worldwide‑shipping, installation guidance, operation training and after‑sales‑service for fire‑hazard‑testing‑instruments. If you need IEC 60695‑11‑10 compliant 50 W horizontal‑vertical flame‑tester, please contact our sales‑team for quotation and technical datasheet.

We offer customization to meet your specific needs. Our expert team will collaborate with you to develop the perfect product for you

IEC 60695-11-10 50W Horizontal & Vertical Flame Test

Method A: Horizontal burning test (HB)

Method B: Vertical burning test