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High-temperature wires & cablesEN 50525-2-41 & UL 758300/500 V to 1,000 V−60 to +180 / +200 °C

Silicone Rubber Insulated High-Temperature Wire (H05S-K & UL 3512)300/500 V to 1,000 V −60 to +200 °C EN 50525-2-41 & UL single-core silicone wire

Harmonized European EN 50525-2-41 (H03S-K, H05S-U, H05S-K, H05SJ-U, H05SJ-K, H05S-H) and UL 758 (Styles 3512 600 V & 3644 1,000 V) single-core cross-linked silicone rubber hook-up and panel wires for −60 °C to +180/+200 °C service.

Flame-retardant

Outdoor & humid

Approved

Preview configuration

Order designation: H05S-K · 1.5 mm²
Nominal OD: 3.20 mm
SiR wall: 0.80 mm
Mass ≈: 22.0 kg/km
Max. DC res.: 13.30 Ω/km

Check against my drum All sizes (16)

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Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum

Max. operating T: 180 / 200 °C
Voltage classes: 300 V to 1,000 V
Insulation: Silicone EI2
Size range: 0.5–95 mm²
Low-temp limit: −60 °C
Min. bend radius: 4 × OD / 6 × OD

Typical values for this cable type, based on EN 50525-2-41 & UL 758 — confirmed in the datasheet and quotation for your order.

Application fit

Is H05S-K / H05SJ-K / UL 3512 / 3644 right for your machine?

Extra-flexible Class 5 tinned-copper single-core silicone wire (-60 °C to +180 °C) for hot-zone cabinet harnesses, luminaires and thermal apparatus.

Furnace, kiln & high-temp zone

Suitable

Remains soft and elastic from -60 °C to +180 °C around ovens, kilns and heated platens.

Switchgear & control cabinet wiring

Suitable

Flexible hook-up and jumper wiring inside switchgear, inverter cubicles and thermal equipment.

Motor stator, traction & converter leads

With conditions

Suitable for Class H terminal leads inside conduits or enclosures protected from sharp abrasion.

Trailing & towing

Not suitable

Unbraided silicone rubber has low tear/cut resistance if dragged over rough floors.

Use Silicone Fibreglass Wire

Motorised monospiral reel

Not suitable

Single-core equipment wire — not rated for motorised cable reels.

Use (N)SHTÖU Reeling

Typical machinesSwitchgear, inverter & UPS cabinet wiringCommercial catering & baking ovensHigh-temperature lighting & ballastsSauna, HVAC & climate test chambersPlastics extrusion & moulding heatersMetallurgical & glass-plant control panels

Construction

Layer by layer

A solid (Class 1 -U) or finely stranded (Class 5 -K / -H or UL stranded) tinned or bare copper conductor is insulated with cross-linked EI2 silicone rubber (300/300 V on H03S-K, 300/500 V on H05S, 600 Vac on UL 3512, 1,000 Vac on UL 3644). On H05SJ-U and H05SJ-K, an outer treated glass-fibre braid adds mechanical abrasion resistance.

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Tinned or bare copper conductor	EN 60228 Class 1 solid (-U) or Class 5 flexible (-K / -H) tinned/bare copper (0.5–95 mm²), or UL 758 stranded tinned copperEN 60228 & UL 758
2	Cross-linked silicone rubber (EI2)	Halogen-free vulcanized silicone elastomer compound EI2 per EN 50363-1 (180 °C) or UL 758 extruded silicone (200 °C)EN 50363-1 / UL 758
3	Glass-fibre braid (H05SJ-U / H05SJ-K)	Saturant-treated E-glass braid applied over EI2 silicone on H05SJ-U & H05SJ-K (omitted on unbraided H03S-K, H05S-U/K/H, UL 3512 & UL 3644)EN 50525-2-41

H03S-K (300/300 V) · H05S-U / H05S-K / H05S-H (300/500 V)

Unbraided EN 50525-2-41 EI2 silicone single cores (0.5–2.5 mm², −60 °C to +180 °C) for rapid automated stripping

H05SJ-U (Solid) & H05SJ-K (Flexible) · 300/500 V Braided

EN 50525-2-41 EI2 silicone core + treated glass-fibre outer braid (0.5–95 mm², −60 °C to +180 °C) for mechanical protection

UL AWM Style 3512 (600 Vac) & Style 3644 (1,000 Vac)

UL 758 unbraided extruded silicone hook-up & power lead wire rated +200 °C from 30 AWG up to 500 / 1,000 kcmil

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on EN 50525-2-41 & UL 758. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage by style: 300/300 V (H03S-K) · 300/500 V (H05S-U, H05S-K, H05SJ-U, H05SJ-K, H05S-H) · 600 Vac (UL 3512) · 1,000 Vac (UL 3644)
AC test voltage: 2.0 kV Vac AC test voltage (EN 50525-2-41 & UL 3512) · 3.0 kV Vac (UL 3644 1,000 V)
Conductor classes & plating: Tinned or bare annealed copper per EN 60228 Class 1 solid (-U) or Class 5 flexible (-K / -H), and stranded tinned copper per UL 758

Thermal

Operating & short-circuit temperature: −60 °C to +180 °C max conductor temperature (EN 50525-2-41 EI2; short-circuit +350 °C) · −60 °C to +200 °C (UL 3512 & UL 3644)
Fire silica-ash integrity: Under direct flame exposure, silicone elastomer converts to a non-conductive SiO2 silica ash layer

Mechanical

Unbraided & braided options: Unbraided smooth EI2 silicone wall (H03S-K, H05S-U/K/H, UL 3512, UL 3644) or EI2 silicone + treated glass-fibre outer braid (H05SJ-U, H05SJ-K)
Minimum bending radius: 4–6 × OD fixed

Resistance

Flame & halogen-free performance: IEC 60332-1-2 & UL FT2 / VW-1 flame retardant; halogen-free per IEC 60754-1/2; forms insulating SiO2 silica ash under fire
Ozone, UV & ageing resistance: Immune to ozone, UV radiation, humid heat and elastomeric plasticiser migration

Reference standards

Applicable standards: EN 50525-2-41 (DIN VDE 0285-525-2-41 / HD 22.3); EN 60228; UL 758 Styles 3512 & 3644
Environmental compliance: CE, HAR, UL AWM, RoHS & REACH compliant

Identification

8 harmonized & UL styles: 8 style routes: H03S-K (300/300V), H05S-U, H05S-K, H05S-H, H05SJ-U, H05SJ-K (300/500V), UL 3512 (600V), UL 3644 (1,000V)
Standard colours: Reddish-Brown, Black, White, Blue, Red, Yellow, Green, Grey, Violet, Orange & Green/Yellow

Sizes

16 representative configurations across EN 50525-2-41 (H03S, H05S, H05SJ) & UL 3512 / 3644

Nominal conductor stranding, EI2 silicone wall thickness, finished wire OD, mass and max DC resistance at 20 °C.

Dimensions, voltage & electrical
Style · Size	Rated voltage	Temp. rating	Nominal CSA	Conductor class / stranding	Cond. Ø mm	SiR wall mm	Nominal OD mm	Mass ≈ kg/km	Max. DC res. (20 °C) Ω/km
EN 50525-2-41 Unbraided · H03S-K (300/300 V) & H05S-U / H05S-K / H05S-H (300/500 V, 180 °C)
H03S-K · 0.75 mm²	300/300 V	180 °C	0.75 mm²	Class 5 (24×0.20)	1.15	0.60	2.35	11.5	26.00
H05S-U · 1.5 mm²	300/500 V	180 °C	1.5 mm²	Class 1 (1×1.38)	1.38	0.80	2.98	21.0	12.10
H05S-K · 0.75 mm²	300/500 V	180 °C	0.75 mm²	Class 5 (24×0.20)	1.15	0.80	2.75	13.8	26.00
H05S-K · 1.0 mm²	300/500 V	180 °C	1.0 mm²	Class 5 (32×0.20)	1.30	0.80	2.90	16.5	19.50
H05S-K · 1.5 mm²	300/500 V	180 °C	1.5 mm²	Class 5 (30×0.25)	1.60	0.80	3.20	22.0	13.30
H05S-K · 2.5 mm²	300/500 V	180 °C	2.5 mm²	Class 5 (50×0.25)	2.00	0.90	3.80	34.5	7.98
H05S-H · 1.5 mm²	300/500 V	180 °C	1.5 mm²	Class 5/6 Fine	1.60	0.80	3.20	22.2	13.30
EN 50525-2-41 Glass-Fibre Braided · H05SJ-U & H05SJ-K (300/500 V, 180 °C, 0.5–95 mm²)
H05SJ-U · 1.5 mm²	300/500 V	180 °C	1.5 mm²	Class 1 (1×1.38)	1.38	0.80	3.40	24.5	12.10
H05SJ-K · 1.5 mm²	300/500 V	180 °C	1.5 mm²	Class 5 (30×0.25)	1.60	0.80	3.60	25.5	13.30
H05SJ-K · 2.5 mm²	300/500 V	180 °C	2.5 mm²	Class 5 (50×0.25)	2.00	0.90	4.20	38.0	7.98
H05SJ-K · 6.0 mm²	300/500 V	180 °C	6.0 mm²	Class 5 (84×0.30)	3.10	1.00	5.60	76.0	3.30
H05SJ-K · 16 mm²	300/500 V	180 °C	16 mm²	Class 5 (126×0.40)	5.10	1.20	8.10	182.0	1.21
UL 758 Extruded Silicone · Style 3512 (600 Vac, 200 °C) & Style 3644 (1,000 Vac, 200 °C)
UL AWM 3512 · 16 AWG	600 Vac	200 °C	1.31 mm²	26/30	1.50	0.76	3.02	18.5	14.00
UL AWM 3512 · 12 AWG	600 Vac	200 °C	3.31 mm²	65/30	2.36	0.76	3.88	38.0	5.60
UL AWM 3644 · 14 AWG	1,000 Vac	200 °C	2.08 mm²	41/30	1.88	1.14	4.16	32.5	8.90
UL AWM 3644 · 10 AWG	1,000 Vac	200 °C	5.26 mm²	105/30	2.95	1.14	5.23	64.0	3.50

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
H05SJ-K is manufactured up to 95 mm²; UL 3512 (600 Vac) and UL 3644 (1,000 Vac) are available up to 500 kcmil and 1,000 kcmil respectively.

Reel check

Will it fit your machine?

A first screen using datasheet values. Engineering confirms drum geometry, acceleration and tension with your quotation.

Cable sizeDrum core diameter (mm)

Cable length on drum (m)

Enter your drum core diameterMinimum for this size is about 26 mm

Minimum bending radius: 13 mm
Min. drum core diameter: ≈ 26 mm
Cable weight on drum: 2.2 kg
Outer diameter: 3.2 mm

Indicative only: based on the datasheet outer diameter and 4 × OD bending radius. Current derating for wound layers per DIN VDE 0298-4 is assessed separately.

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

ConductorClass 5 stranding
Spark test100 % in-line
Lay-upCores, earth, fillers
SheathingInner, braid / screen, outer
Electrical testsAC voltage, resistance
DimensionsOD, wall thickness
Inspection documents & dispatchDrum & dispatch

Testing & inspection	Test value / reference	Frequency
Routine tests
AC dielectric & spark test	2.0 kV Vac (EN 50525-2-41 / UL 3512) or 3.0 kV Vac (UL 3644) dielectric test + 100% in-line spark test	Every spool
Conductor DC resistance check	Verified at 20 °C per EN 60228 Class 1 / Class 5 and UL 758	Every spool
Sample tests
Halogen-free & flame test	IEC 60332-1-2 vertical flame, UL FT2/VW-1, and IEC 60754-1/2 halogen-free verification	Production lot
Thermal endurance & −60 °C cold bend	EI2 cross-linked silicone aging at 180/200 °C and −60 °C low-temperature winding test	Production lot

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

EN 50525-2-41 & UL 758CE · LVDRoHS · REACH

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX · <HAR> H05S-K (or H05SJ-K) · or UL AWM STYLE 3512 200°C 600V / STYLE 3644 1000V

Delivery form: Spools, coils, drums and cut-and-stripped harness leads
Lengths: 100 m coils, 500 m / 1,000 m spools and custom cut lengths
Certificate: EN 10204 3.1 inspection certificate with every dispatch
Quote response: Engineering specification and quote within 2 business hours

Technical documents

Downloads

PDFSilicone Rubber Insulated High-Temperature Wire (H05S-K & UL 3512) – technical datasheet16 sizes · construction, technical data, approvals XLSXH05S-K / H05SJ-K / UL 3512 / 3644 spec data (Excel)All 16 sizes with dimensions and data, for your BOM or quotation

Revision: 2026-10-20
Updated: 2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

How do the EN 50525-2-41 codes H03S-K, H05S-U, H05S-K and H05SJ-K differ?

'H' denotes a CENELEC harmonized standard wire; '03' is 300/300 V and '05' is 300/500 V; 'S' designates cross-linked silicone rubber (compound EI2); 'J' indicates an outer glass-fibre braid; '-U' is a Class 1 solid copper conductor and '-K' is a Class 5 flexible stranded conductor.

When should I specify UL 3512 or UL 3644 instead of H05S-K?

Specify UL AWM Style 3512 (600 Vac, 200 °C) or UL AWM Style 3644 (1,000 Vac, 200 °C) when the equipment requires North American UL 758 recognition or operates at 600 V / 1,000 V above the 300/500 V harmonized limit.

Are EN 50525-2-41 silicone wires halogen-free?

Yes. Cross-linked EI2 silicone elastomer contains zero halogens and passes IEC 60754-1 and IEC 60754-2 combustion gas acidity and conductivity tests.

Should I choose tinned copper or bare copper conductors?

Tinned copper is standard and recommended for high-temperature silicone wires because the tin barrier prevents copper oxidation above 120 °C and preserves easy solderability and low crimp contact resistance.

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02Reel & motion

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03Message for our engineers

Silicone Rubber Insulated High Temperature Wire

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
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- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
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- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
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