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Hook-up & equipment wiresEN 50306-4 Multicore & Multipair300 V · MM & Screened MMSEN 45545-2 HL3

EN 50306-4 Thin-Wall Multicore and Multipair Rolling Stock CableEN 50306-4 300 V thin-wall multicore & multipair railway rolling stock cable

High-density 300 V railway rolling-stock multicore and multipair harness cable certified to EN 50306-4 and EN 45545-2 HL3, assembling EN 50306-2 thin-wall cores or EN 50306-3 screened pairs (0.5–2.5 mm²) inside an oil/fuel-resistant EM 104 cross-linked sheath.

Flame-retardant

Oil-resistant

Low-EMC design

Approved

Cores × cross-section

Order designation: EN 50306-4 12×0.5 MMS
Outer Ø min: 7.6 mm
Outer Ø max: 8.3 mm
Weight ≈: 122 kg/km
Min. bend R: 42 mm

Check against my drum All sizes (20)

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

Voltage rating: 300 V
Core / pair count: 2–48C / 2–19P
Screening options: MM / MMS / 5P/7P
Fire hazard: HL1 / HL2 / HL3
Temp. range: −40…+90/+105 °C
Size range: 0.5–2.5 mm²

Typical values for this cable type, based on EN 50306-4 / EN 45545-2 HL1–HL3 — confirmed in the datasheet and quotation for your order.

Application fit

Is EN 50306-4 right for your machine?

EN 50306-4 is the primary high-core-count signal and control cable across European passenger trains and locomotives, offering up to 48 cores or 19 twisted pairs in a fraction of the diameter and weight of EN 50264 cables.

Fixed installation

Suitable

High-density inter-rack harnesses, driver desk trunks, door/HVAC/brake control and coach signal buses.

VFD inverter to AC motor screened feeder

Suitable

Available with overall tinned-copper braid (MMS / 3P) or individually screened pairs + overall screen (7P).

Trailing & towing

With conditions

Designed for fixed coach wiring and inter-cubicle harnesses; not for external bogie ground drag.

Use EN 50264-3-2

Energy chain / drag chain

Not suitable

For 0.6/1 kV power and control circuits above 300 V, select EN 50264-3-2.

Use EN 50264-3-2

Typical machinesHigh-speed train & EMU coach harnessesTCMS, door, brake & HVAC control trunksDriver desk & switchgear cubicle interconnectsPassenger information, CCTV & intercom trunksModular pre-terminated Harting rail harnesses

Construction

Layer by layer

Shown: EN 50306-4 300 V 12×0.5 MMS — twelve 19-strand tinned copper EN 50306-2 thin-wall cross-linked cores (white with black sequential numbers), halogen-free separator tape, tinned-copper wire braid screen ('S') and black EM 104 cross-linked LSZH outer sheath ('M').

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	19/37-strand tinned copper conductor	Concentric-stranded tinned annealed copper to EN 50306-2 (0.5 to 2.5 mm²)EN 50306-2 / EN 50306-4
2	Thin-wall EI 101–105 core insulation	0.25–0.30 mm electron-beam cross-linked halogen-free cores (multicore or twisted pairs)EN 50306-1 / EN 50306-2
3	Halogen-free wrapping tape	Overlapped polyester separator tape over the cabled cores or EN 50306-3 screened pair elementsEN 50306-4
4	Optional tinned-copper braid (MMS)	Unscreened ('MM' / '1P') or overall tinned-copper wire braid screen ('MMS' / '3P' / '7P') with ZT ≤ 100 mΩ/mEN 50306-4 · EN 50121-3-2
5	Cross-linked EM 104 outer sheath	Halogen-free, low-smoke, oil-, fuel- and −40 °C cold-resistant cross-linked elastomer (EM 104), blackEN 50306-1 EM 104 · EN 45545-2 HL3

EN 50306-4 Multicore MM & MMS (1E / 3E — 2 to 48 cores)

Unscreened (MM) or overall tinned-Cu braid screened (MMS) thin-wall multicore cables

EN 50306-4 Multipair 1P & 3P (2 to 19 twisted pairs)

Unscreened (1P) or overall tinned-Cu braid screened (3P) twisted-pair railway signal cables

EN 50306-4 Individually Screened Pairs 5P & 7P

Assembled from EN 50306-3 screened pairs with outer EM 104 sheath (5P) or additional overall braid (7P)

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on EN 50306-4 / EN 45545-2 HL1–HL3. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U: 300/300 V AC (max. operating 330 V AC / 495 V DC)
AC test voltage (50 Hz): 1.5 kV AC (core/core) · 1.0 kV AC (core/screen) for 5 min
Surface transfer impedance: ≤ 100 mΩ/m at 30 MHz (MMS / 3P / 7P screened versions)

Thermal

Operating temperature range: −40 °C (Class E) or −25 °C (Class P) to +90 °C (+105 °C 20,000 h class)
Short-circuit temperature: +200 °C max. (5 s)

Mechanical

Min. bending radius, fixed: 4 × OD (unscreened D ≤ 12 mm) · 5 × OD (D > 12 mm) · 6 × OD (screened MMS)
Min. bending radius, flexing: 8 × OD (unscreened) · 10 × OD (screened)
Compact harness profile: Saves up to 40 % weight and 35 % diameter compared with EN 50264-2-2 multicore cables

Resistance

Railway fire safety: EN 45545-2 Hazard Level HL1, HL2 & HL3 (Requirement Sets R15 & R16)
Oil, fuel & ozone: EM 104 cross-linked sheath resists mineral oil (IRM 902), diesel fuel (IRM 903), acid/alkali and ozone
Smoke & toxicity: EN 61034-2 low smoke · EN 60754-1/2 zero halogen · EN 50305 low toxicity

Reference standards

Primary standard: EN 50306-4 (Thin wall multicore and multipair railway rolling stock cables)
Component standards: EN 50306-2 (thin-wall cores), EN 50306-3 (screened sub-elements) & EN 50306-1 (compounds)
Fire & EMC compliance: EN 45545-2 HL1–HL3 & EN 50121-3-2
RoHS & REACH: 2011/65/EU (RoHS 2) & EC 1907/2006 compliant

Identification

Sheath colour: Black
Core identification: White cores with black numbers (or black cores with white numbers) per EN 50306-4
Sheath marking: TEBAOFLEX EN 50306-4 300V [Size] MM/MMS E EN 45545-2 HL3
Customs tariff (HS): 8544.49 (insulated conductors ≤ 1000 V)

Sizes

20 standard EN 50306-4 configurations

Typical EN 50306-4 / EN 45545-2 HL1–HL3 outer diameter limits, copper content and cable weight.

Dimensions & weights
Order designation	Cores × mm² / AWG	AWG ≈	Outer Ø min mm	Outer Ø max mm	Copper kg/km	Weight ≈ kg/km	Min. bend R mm
300 V Thin-Wall Unscreened Multicore (EN 50306-4 MM / 1E)
EN 50306-4 4×0.5 MM	4×0.5	20	4.7	5.1	19	36	26
EN 50306-4 7×0.5 MM	7×0.5	20	5.4	5.9	33	54	30
EN 50306-4 12×0.5 MM	12×0.5	20	7.0	7.6	57	89	38
EN 50306-4 19×0.5 MM	19×0.5	20	8.2	8.9	91	134	44
EN 50306-4 27×0.5 MM	27×0.5	20	9.8	10.6	129	188	53
EN 50306-4 37×0.5 MM	37×0.5	20	10.9	11.9	177	248	60
300 V Thin-Wall Screened Multicore (EN 50306-4 MMS / 3E)
EN 50306-4 4×0.5 MMS	4×0.5	20	5.2	5.7	34	52	28
EN 50306-4 7×0.5 MMS	7×0.5	20	6.1	6.6	52	76	33
EN 50306-4 12×0.5 MMS	12×0.5	20	7.6	8.3	82	122	42
EN 50306-4 19×0.5 MMS	19×0.5	20	8.9	9.7	124	178	48
EN 50306-4 37×0.5 MMS	37×0.5	20	11.8	12.8	226	315	64
EN 50306-4 4×1.0 MMS	4×1.0	18	6.1	6.6	58	82	33
EN 50306-4 7×1.0 MMS	7×1.0	18	7.0	7.6	92	124	38
EN 50306-4 12×1.0 MMS	12×1.0	18	9.0	9.8	152	204	49
EN 50306-4 4×1.5 MMS	4×1.5	16	7.0	7.6	82	114	38
EN 50306-4 7×1.5 MMS	7×1.5	16	8.2	8.9	132	176	44
300 V Thin-Wall Screened Multipair (EN 50306-4 3P / 7P)
EN 50306-4 2×2×0.5 3P (Pairs MMS)	2×2×0.5	20	6.1	6.6	34	56	33
EN 50306-4 4×2×0.5 3P (Pairs MMS)	4×2×0.5	20	7.3	7.9	60	94	40
EN 50306-4 7×2×0.5 3P (Pairs MMS)	7×2×0.5	20	8.8	9.6	98	148	48
EN 50306-4 4×2×0.75 3P (Pairs MMS)	4×2×0.75	18	8.1	8.8	82	124	44

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Dimensions and weights are typical values per EN 50306-4 / EN 45545-2 HL1–HL3. Minimum fixed bending radius shown is 5 × OD.

Electrical & current ratings
Cross-section mm²	AWG ≈	Max. DC resistance 20 °C, Ω/km	Single wire in air 30 °C, A	Multi-core bundle 30 °C, A
0.5	20	40.1	10	7
0.75	18	26.7	13	10
1	18	20	16	12
1.5	16	13.7	21	16

Current ratings at 30 °C ambient in free air. Apply temperature and bundle grouping factors per applicable equipment standard.

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)

Drum core 300 mm ≥ 84 mmBending radius OK (5 × OD 8.3 mm)

Minimum bending radius: 42 mm
Min. drum core diameter: ≈ 84 mm
Cable weight on drum: 6.1 kg
Copper content: 4.1 kg

Indicative only: based on the datasheet outer diameter and 5 × 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 voltage test	1.5 kV AC (50/60 Hz)	Every manufactured length
Conductor DC resistance	IEC 60228 / ASTM (tinned copper)	Every manufactured length
Sample tests
Flame propagation test	IEC 60332-1-2 / UL VW-1 / ISO 6722-1	Per production batch
Insulation & sheath material physical properties	EN 50306-4 / EN 45545-2 HL1–HL3	Type approval

Inspection certificate

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

Product approvals

EN 50306-4 / EN 45545-2 HL1–HL3CE · RoHS 2 (2011/65/EU) · REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX EN 50306-4 300V [Size] MM/MMS E EN 45545-2 HL3

Delivery form: Export wooden drums, reels or coils, cut-to-length on request
Packaging: Heat-treated ISPM-15 timber drums or spools with sealed ends
Conductor / colour options: Custom core counts, stripe combinations or cut harnesses on request

Technical documents

Downloads

PDFEN 50306-4 Thin-Wall Multicore and Multipair Rolling Stock Cable – technical datasheet20 sizes · construction, technical data, approvals XLSXEN 50306-4 spec data (Excel)All 20 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.

Explain the EN 50306-4 family codes (1E, 3E, 5E, 7E and 1P, 3P, 5P, 7P).

In EN 50306-4 table designations, 'E' denotes concentric multicore stranding and 'P' denotes twisted-pair/triad/quad stranding: 1E / 1P = unscreened cores or pairs under an EM 104 outer sheath; 3E / 3P = unscreened cores or pairs with an overall tinned-copper braid screen and EM 104 sheath; 5E / 5P = individually screened EN 50306-3 elements under an EM 104 outer sheath; 7E / 7P = individually screened EN 50306-3 elements plus an additional overall tinned-copper braid screen and outer EM 104 sheath.

How much lighter is EN 50306-4 than EN 50264-3-2?

For a 12×0.5 mm² unscreened cable, EN 50306-4 (300 V thin wall) has an outer diameter of ~7.6 mm and weighs ~89 kg/km, compared with ~9.4 mm and ~138 kg/km for EN 50264-3-2 — a 35 % weight saving across kilometres of coach wiring.

Can EN 50306-4 be used outside the train car body?

Yes, because the outer sheath is EN 50306-1 Type EM 104 cross-linked elastomer resistant to oil, diesel fuel, UV, ozone and −40 °C cold, satisfying EN 45545-2 R15 (interior) and R16 (exterior) HL3.

What conductor sizes are covered by EN 50306-4?

EN 50306-4 covers 0.5 mm², 0.75 mm², 1.0 mm², 1.5 mm² and 2.5 mm² concentric-stranded tinned copper conductors.

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01Selected sizes

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02Reel & motion

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Reel typeDrum core diameter (mm)Cable length on drum (m)Travel speed (m/min)Max. accelerationCycles per hourLength and quantityAmbient temperatureExposure (outdoor, water, oil, abrasion)Destination countryEquipment and operating conditions

03Message for our engineers

EN 50306-4 Thin-Wall Multicore and Multipair Rolling Stock Cable

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
- Equipment and operating conditions:

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