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Product

Control & signal cableAJ- Induction Protected (r_k)H45 ≤ 45 nF/km Low-CapCu Screen (D) + Steel Armour (B)

AJ-2Y(L)2YDB2Y H45 Induction-Protected Railway Telecom CableDB 416.0115 'AJ' induction-protected (r_k ≤ 0.1–0.25) H45 (≤ 45 nF/km) railway quad cable

AJ-2Y(L)2YDB2Y H45 induction-protected railway telecom and axle-counter cable (DB 416.0115) for 15 kV / 25 kV AC rail lines, combining H45 (≤ 45 nF/km) star-quads, '(L)2Y' Al/PE barrier, copper wire screen ('D'), magnetic steel tapes ('B'), and HDPE jacket.

Low-EMC design
EMC screen
Outdoor & humid
Ozone, UV & moisture
Order designation
AJ-2Y(L)2YDB2Y 4×4×0.9 H45
Outer Ø ≈
19.50 mm
Wall thickness
2.15 mm
Total weight ≈
545.0 kg/km
Min. bend R (fixed)
295 mm
All sizes (10)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Reduction factor
r_k ≤ 0.10–0.25
At 16.7 / 50 Hz (100–300 V/km)
Capacitance
H45 ≤ 45 nF/km
Low-loss axle-counter star-quads
Heavy screen
(L)2Y + Cu (D)
Al/PE sheath + copper wire screen
Magnetic armour
2 × steel tape
High-permeability steel tapes (B)
Quad conductor
0.9–1.4 mm Cu
Solid bare Cu star-quads (x4)
Service temp.
-40…+70 °C
Electrified mainline trough/burial

Typical values for this cable type, based on DB 416.0115 / DIN VDE 0816 AJ Induction-Protected H45 Railway Telecom Specification — confirmed in the datasheet and quotation for your order.

Application fit

Is AJ-2Y(L)2YDB2Y H45 right for your machine?

Select AJ-2Y(L)2YDB2Y H45 for electrified 15 kV 16.7 Hz and 25 kV 50 Hz AC railway corridors where catenary traction return currents and short-circuits induce longitudinal voltages along trackside cables.

VFD inverter to AC motor screened feeder

Suitable

Copper wire screen ('D') and magnetic steel tape armour ('B') achieve r_k ≤ 0.10–0.25 along AC traction lines.

Fixed installation

Suitable

H45 low capacitance (≤ 45 nF/km) supports long-haul axle counters, ETCS LEU links, and trackside interlocking circuits.

Typical machines15 kV 16.7 Hz & 25 kV 50 Hz AC Mainline RailHigh-Speed Rail Axle-Counter NetworksETCS Level 2 & Interlocking BackboneTraction Substation Approach CorridorsLong Parallel Catenary Cable Troughs

Construction

Layer by layer

DB 416.0115 AJ construction: solid copper star-quads with H45 2Y PE insulation (≤ 45 nF/km), (L)2Y Al/PE laminated inner sheath, helical copper wire screen (D), high-permeability double steel tape armour (B), and 2Y HDPE jacket.

123456
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Solid bare copper star-quadsAnnealed solid bare copper wire (0.9 mm, 1.2 mm, or 1.4 mm) twisted in precision star-quadsHigh magnetic symmetry (k1, e1-2 capacitive balance) suppresses differential-mode noise
2H45 low-capacitance 2Y PELow-permittivity polyethylene (2Y) core insulationMaintains mutual capacitance ≤ 45 nF/km at 800 Hz for long axle-counter blocks
3(L)2Y Al/PE laminated inner sheathCopolymer-coated aluminum tape fused longitudinally to an extruded PE inner sheathRadial water-vapour barrier and inner conductive screen layer
4Heavy copper wire screen (D)Helically applied bare copper wires / copper counter-helix over the (L)2Y sheathProvides the low DC screen resistance required for a low reduction factor r_k
5High-permeability steel tape armour (B)Two helically applied magnetic steel tapes with high permeability (μr)Boosts screen self-inductance at 16.7 Hz / 50 Hz so induced sheath current cancels core EMF
62Y black HDPE outer sheathUV-stabilised carbon-black polyethylene outer jacketInsulates the earthed armour/screen assembly and resists ballast abrasion

AJ-2Y(L)2YDB2Y n×4×0.9 H45 (r_k 0.2 / 0.1)

0.9 mm induction-protected H45 star-quad cable for axle counters alongside AC catenary

AJ-2Y(L)2YDB2Y n×4×1.4 H45 (r_k 0.2 / 0.1)

1.4 mm induction-protected H45 star-quad cable for long-distance interlocking and block circuits

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on DB 416.0115 / DIN VDE 0816 AJ Induction-Protected H45 Railway Telecom Specification. Values for your order are confirmed in the datasheet and quotation.

Electrical

Reduction factor r_k
≤ 0.10 to ≤ 0.25 at 16.7 / 50 Hz (100–300 V/km)
Mutual capacitance (H45)
≤ 45 nF/km at 800 Hz
Loop resistance (+20 °C)
≤ 56.6 Ω/km (0.9) · ≤ 31.8 Ω/km (1.2) · ≤ 23.4 Ω/km (1.4)
AC dielectric test voltage
2,500 V AC (core/core & core/screen)

Thermal

Operating temperature (fixed)
-40 °C to +70 °C
Installation temperature
-20 °C to +50 °C

Mechanical

Screen & armour system
(L)2Y Al + Cu wire screen (D) + steel tapes (B)
Min. bending radius
15 × overall cable diameter
Max. pulling tension
50 N/mm² of total copper cross-section

Resistance

AC traction induction
Protected against 15 kV 16.7 Hz & 25 kV 50 Hz
Radial moisture barrier
(L)2Y laminated aluminum/PE inner sheath
Rodent & impact resistance
Double steel tape armour ('B') + HDPE jacket

Reference standards

Primary specifications
DB TL 416.0115 & DIN VDE 0816
EMC & railway safety
EN 50121-4 & ITU-T K.20 reduction factor
RoHS & REACH
RoHS 3 & REACH compliant

Identification

Outer sheath colour
Black (RAL 9005)
Surface legend
TEBAOFLEX AJ-2Y(L)2YDB2Y [n×4×d] H45 r_k DB
Customs tariff (HS)
8544.49

Sizes

10 standard configurations (AJ-2Y(L)2YDB2Y H45)

Engineering dimensions, conductor stranding, mass and electrical ratings for AJ-2Y(L)2YDB2Y H45 per DB 416.0115 / DIN VDE 0816 AJ Induction-Protected H45 Railway Telecom Specification.

Dimensions & weights
Order designationCross-section / sizeConductor buildWall ≈
mm		Outer Ø ≈
mm		Metal
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard AJ-2Y(L)2YDB2Y H45 configurations
AJ-2Y(L)2YDB2Y 2×4×0.9 H452×4×0.9≤ 0.201.8917.20184.8420.0260
AJ-2Y(L)2YDB2Y 4×4×0.9 H454×4×0.9≤ 0.202.1519.50239.8545.0295
AJ-2Y(L)2YDB2Y 6×4×0.9 H456×4×0.9≤ 0.152.4222.00299.2680.0330
AJ-2Y(L)2YDB2Y 10×4×0.9 H4510×4×0.9≤ 0.152.7925.40400.4910.0380
AJ-2Y(L)2YDB2Y 14×4×0.9 H4514×4×0.9≤ 0.123.1028.20497.21,130.0425
AJ-2Y(L)2YDB2Y 20×4×0.9 H4520×4×0.9≤ 0.103.5031.80633.61,440.0480
AJ-2Y(L)2YDB2Y 2×4×1.4 H452×4×1.4≤ 0.202.2720.60279.4635.0310
AJ-2Y(L)2YDB2Y 4×4×1.4 H454×4×1.4≤ 0.152.5823.50374.0850.0355
AJ-2Y(L)2YDB2Y 6×4×1.4 H456×4×1.4≤ 0.152.9727.00492.81,120.0405
AJ-2Y(L)2YDB2Y 10×4×1.4 H4510×4×1.4≤ 0.103.4631.50699.61,590.0475
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal engineering values for AJ-2Y(L)2YDB2Y H45 subject to standard manufacturing tolerances per DB 416.0115 / DIN VDE 0816 AJ Induction-Protected H45 Railway Telecom Specification.

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.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
Dielectric spark / high-voltage withstand test100 % in-line spark and AC/DC dielectric withstand per DB 416.0115 / DIN VDE 0816 AJ Induction-Protected H45 Railway Telecom SpecificationEvery manufactured length
Conductor DC resistance & continuity checkWithin maximum 20 °C resistance limit specified for AJ-2Y(L)2YDB2Y H45Every spool or drum length
Sample tests
Insulation resistance & dimensional verificationWall thickness, concentricity and insulation resistance per DB 416.0115 / DIN VDE 0816 AJ Induction-Protected H45 Railway Telecom SpecificationPer production batch
Environmental, mechanical & EMC qualificationQualified to DB 416.0115 / DIN VDE 0816 AJ Induction-Protected H45 Railway Telecom Specification thermal, mechanical and environmental performance criteriaType qualification

Inspection certificate

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

Product approvals

DB 416.0115 / DIN VDE 0816 AJ Induction-Protected H45 Railway Telecom SpecificationCE (2014/35/EU) & RoHS 3 (2015/863/EU) CompliantREACH SVHC Compliance Verified

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX AJ-2Y(L)2YDB2Y 4x4x0.9 H45 DB 416.0115 INDUCTION PROTECTED
Delivery form
Export wooden drums, tactical reels or coils
Standard lengths
100 m · 500 m · 1000 m (or custom cut lengths)
MOQ
100 m (stock sizes) · 300–500 m (custom build)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFAJ-2Y(L)2YDB2Y H45 Induction-Protected Railway Telecom Cable – technical datasheet10 sizes · construction, technical data, approvalsXLSXAJ-2Y(L)2YDB2Y H45 spec data (Excel)All 10 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.

What do 'AJ-' and 'D' mean in AJ-2Y(L)2YDB2Y H45?
'AJ-' designates an outdoor railway cable protected against electromagnetic induction from AC overhead catenary lines (Induktionsgeschütztes Außenkabel). 'D' designates the heavy copper wire screen applied beneath the high-permeability steel tape armour ('B').
How does the cable achieve a low reduction factor (r_k ≤ 0.10–0.25) at 16.7 Hz and 50 Hz?
The cable reduction factor is r_k ≈ R_s / √(R_s² + (ω·L_s)²). The copper wire screen ('D') provides very low longitudinal DC resistance R_s, while the high-permeability magnetic steel tapes ('B') dramatically increase screen inductance L_s at 16.7 Hz / 50 Hz. When earthed at both ends, the induced sheath current creates an opposing magnetic flux that cancels 75–90 % of the longitudinal voltage in the signal cores.
Why must both ends of the 'D' copper screen and 'B' armour be earthed?
Inductive compensation only occurs when a closed return loop allows opposing current to flow through the copper wire screen ('D') and aluminum barrier ('(L)'). Proper low-impedance earthing at trackside cabinets and interlocking rooms is mandatory to achieve the rated r_k.
When should I specify AJ-2YOF(L)2YDB2Y instead of AJ-2Y(L)2YDB2Y H45?
Specify AJ-2YOF(L)2YDB2Y when the route requires longitudinal petrolatum jelly water blocking ('OF') in addition to AC traction induction protection ('AJ-...DB').

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AJ-2Y(L)2YDB2Y H45 Induction-Protected Railway Telecom Cable

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