Belden Connectors
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Ships from and sold by A5 IT
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New, with full manufacturer warranty
Key Features
- Face View Side 1 Pin 1: yellow
- Face View Side 1 Pin 2: white
- Face View Side 1 Pin 3: orange
- Face View Side 1 Pin 4: blue
- Face View Side 2 Pin 1: yellow
- Face View Side 2 Pin 2: white
- Face View Side 2 Pin 3: orange
- Face View Side 2 Pin 4: blue
Belden 9578 is an orderable item number in the Belden 0985 508 121 family (Connectors › Industrial Connectors › Data Connectors). Fast Ethernet Cat5e Data Double-Ended Cordset: Male straight D-coded black M12 Railway to male straight D-coded black M12 Railway, shielded, 50 V AC / 60 V DC, 4 A; X-FRNC black cable, 4-wires, 0.34 mm2 This item: Item Description 0985 508 121/12 M. Ships from and sold by A5 IT. Quoted to order.
Notes
| Note Derating | Notice derating |
| Protection Degree / IP Rating Note | ** only if mounted and locked in combination with Hirschmann / Lumberg Automation connector. |
History
| Update And Revision | Revision Number: 0.78 Revision Date: 02-20-2026 |
This Item
| Item Number | 9578 |
| Item Description | 0985 508 121/12 M |
Cable Data
| Core Colors | white, blue, yellow, orange |
| Foil Shield | Al-PT Foil |
| Cable Number | 508 |
| Conductor Size | 0.34 mm2 |
| Number Of Wires | 4 |
| Cable Diameter D | ø 6.70 ± 0.30 mm |
| Cable Jacket Color | black |
| Conductor Material | Cu |
| Cable Jacket Material | X-FRNC |
| Overall Shield (Cable) | Cu-ETP1 tinned |
| Insulated Wire Diameter | ø 1.63 ± 0.05 mm |
| Wire Insulation Material | Polyolefin |
| Flammability Class (Cable Jacket) | IEC 60332-1-2, EN50305, IEC60332-3-25 cat D; fire protection Railway vehicles: DIN 5510-2 protection level 1 to 4; CEN/TS 45545-2 HL1-HL3; smoke density acc. to DIN EN 61034-2, EN50268-2: T ˃70% ;toxicity (NF X70-100-1): CITc ˂ 0.7 |
| Minimal Bending Radius (Fixed Inst) | ˃ 10 x D |
| Ambient Temperature (Drag Chain Inst) | - 5 °C - + 50 °C |
| Minimal Bending Radius (Flexible Inst) | ˃ 5 x D |
| Ambient Temperature (Flex Installation) | - 40 °C - + 90 °C |
| Ambient Temperature (Fixed Installation) | - 40 °C - + 90 °C |
Information
| Connector Type | Cordset, double ended |
| Current Rating | 4 A |
| Product Family | Data Connectors |
| Shielding Type | Shielded |
| Voltage Rating | 60 V |
| Operating Voltage | 50 V AC / 60 V DC |
| Update And Revision | Revision Number: 0.78 Revision Date: 02-20-2026 |
| Rated Impulse Voltage | 1.5 kV |
| Data Transmission Rate | 100 Mbit/s |
| Data Transmission Type | Fast Ethernet Cat5e |
| Face View Side 1 — Pin 1 | yellow |
| Face View Side 1 — Pin 2 | white |
| Face View Side 1 — Pin 3 | orange |
| Face View Side 1 — Pin 4 | blue |
| Face View Side 2 — Pin 1 | yellow |
| Face View Side 2 — Pin 2 | white |
| Face View Side 2 — Pin 3 | orange |
| Face View Side 2 — Pin 4 | blue |
Resistances
| Rail | Yes |
| Halogenfree | IEC 60754-1, EN 50267-1-2, HCL ˂ 0.4% |
| Oil Resistance | IEC 60811-2-1, EN 50306 par 4.8, EN 50306 par 4.9, EN 50306 par 4.10 |
Technical Data Side 1
| Note | Do not connect or disconnect under load. |
| Mating Cycles | ≤ 100 |
| Coding, Side 1 | D |
| Number Of Pins | 4 |
| Attachment Type | Coupling Screw |
| Connector Design | Straight |
| Molded Body Color | Black |
| Attachment Plating | Nickel-plated |
| Shielding Material | CuZn, tin-plated |
| Attachment Material | CuZn |
| Contact Bearer Color | Black |
| Molded Body Material | PA |
| Overvoltage Category | III acc. to DIN EN 60664-1 (VDE 0110-1) |
| Contact Base Material | CuSn |
| Insulation Resistance | ˃ 10^9 Ohm |
| Side 1 Contact Plating | Cu/Au |
| Side 1 Design Standard | IEC 61076-2-101 |
| Contact Bearer Material | PA |
| Side 1 Pollution Degree | 3 acc. to DIN EN 60664-1 (VDE 0110-1) |
| Side 1 Contact Resistance | ≤ 10 mOhm |
| Side 1 Product Sub Family | M12 Railway |
| Fastening Torque (Attachment) | M 12x1: (50-60) Ncm, hand-tight |
| Side 1 Type Of Contact/Gender | Male |
| Protection Degree / IP Rating** | IP65, IP67, IP69K |
| Ambient Temperature (Operation)* | - 40 °C - + 90 °C |
| Flammability Class (Molded Body) | UL 94 V-0 |
| Flammability Class (Contact Bearer) | UL 94 V-0 |
Technical Data Side 2
| Coding, Side 2 | D |
| Mating Cycles, Side 2 | ≤ 100 |
| Number Of Pins, Side 2 | 4 |
| Attachment Type, Side 2 | Coupling Screw |
| Contact Plating, Side 2 | Cu/Au |
| Design Standard, Side 2 | IEC 61076-2-101 |
| Connector Design, Side 2 | Straight |
| Pollution Degree, Side 2 | 3 acc. to DIN EN 60664-1 (VDE 0110-1) |
| Molded Body Color, Side 2 | Black |
| Side 2 Product Sub Family | M12 Railway |
| Attachment Plating, Side 2 | Nickel-plated |
| Contact Resistance, Side 2 | ≤ 10 mOhm |
| Shielding Material, Side 2 | CuZn, tin-plated |
| Attachment Material, Side 2 | CuZn |
| Contact Bearer Color, Side 2 | Black |
| Molded Body Material, Side 2 | PA |
| Overvoltage Category, Side 2 | III acc. to DIN EN 60664-1 (VDE 0110-1) |
| Contact Base Material, Side 2 | CuSn |
| Insulation Resistance, Side 2 | ˃ 10^9 Ohm |
| Side 2 Type Of Contact/Gender | Male |
| Contact Bearer Material, Side 2 | PA |
| Fastening Torque (Attachment), Side 2 | M 12x1: (50-60) Ncm, hand-tight |
| Protection Degree / IP Rating, Side 2** | IP65, IP67, IP69K |
| Ambient Temperature (Operation), Side 2* | - 40 °C - + 90 °C |
| Flammability Class (Molded Body), Side 2 | UL 94 V-0 |
| Flammability Class (Contact Bearer), Side 2 | UL 94 V-0 |
Safety & Environmental Compliance
| RoHS Compliant | yes |
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