


UL 3123 Silicone Hook-Up Wire, 150°C 600V
UL 3123 is a UL-certified silicone hook-up wire rated 150°C and 600 V AC for internal wiring. Its stranded copper conductor and silicone insulation provide a defined construction for appliance leads that specify this temperature and voltage combination.
- Voltage: 600 V AC
- Temperature: 150°C
- Insulation / covering: extruded silicone rubber
- Size selection: 30–16 AWG
- Certification: UL-certified AWM; UL 758
UL 3123 wire selection
UL 3123 is a UL-certified silicone hook-up wire rated 150°C and 600 V AC for internal wiring. Its stranded copper conductor and silicone insulation provide a defined construction for appliance leads that specify this temperature and voltage combination.
The complete dimension table covers eight sizes from 30 AWG to 16 AWG. The nominal silicone wall remains 0.82 mm throughout that range, while the finished diameter increases from 1.95 mm to 3.14 mm. This makes it possible to compare conductor sizes without losing sight of the space needed around the insulated lead. Stranding is listed for each row to support terminal and stripping-tool selection.
Allow a bend radius of 10 times the finished diameter for the listed construction and check the route at the equipment entry. For a replacement lead, confirm that 150°C is the required grade rather than assuming every silicone wire has a 200°C rating. Installation flexibility should also be distinguished from repeated movement in service; moving machinery requires its own cable-duty assessment.
See the Specifications tab for the model and size tables. Browse the high-temperature cable range for related constructions. Use the silicone hook-up wire family for the wider temperature and voltage comparison.
Construction
UL 3123 uses the following conductor and insulation system. The diagram illustrates the layer sequence; select the conductor construction and covering shown in the required size specification.

| Component | Construction detail |
|---|---|
| Conductor | Stranded copper |
| Insulation | Extruded silicone rubber |
| Construction | Single insulated conductor |
Applications
UL 3123 is intended for internal appliance and equipment connections requiring 150°C, 600 V silicone insulation. Keep the lead supported and provide bend space at terminal blocks and enclosure entries.

UL 3123 replacement selection
For replacement enquiries, include the existing wire marking and the equipment connection drawing so the conductor, insulation and terminal arrangement can be matched.
Specifications
| Parameter | Specification |
|---|---|
| UL style | UL 3123 |
| Voltage rating | 600 V AC |
| Temperature rating | 150°C |
| Insulation / covering | extruded silicone rubber |
| Conductor size coverage | 30–16 AWG |
| Nominal silicone wall | 0.82 mm |
| Minimum average / point wall | 30 / 27 mils |
| Bending radius for listed construction | 10 × finished OD |
| Model and conductor size | Stranding (No./mm) | Nominal silicone wall (mm) | Nominal OD / tolerance (mm) |
|---|---|---|---|
| UL 3123 16 AWG | 26/0.254 | 0.82 | 3.14 ± 0.10 |
| UL 3123 18 AWG | 34/0.18 | 0.82 | 2.86 ± 0.10 |
| UL 3123 20 AWG | 21/0.18 | 0.82 | 2.60 ± 0.10 |
| UL 3123 22 AWG | 17/0.16 | 0.82 | 2.41 ± 0.10 |
| UL 3123 24 AWG | 11/0.16 | 0.82 | 2.26 ± 0.10 |
| UL 3123 26 AWG | 7/0.16 | 0.82 | 2.13 ± 0.10 |
| UL 3123 28 AWG | 7/0.127 | 0.82 | 2.03 ± 0.10 |
| UL 3123 30 AWG | 7/0.10 | 0.82 | 1.95 ± 0.10 |
Selecting the specified construction
Specify UL 3123 with the AWG, strand construction and finished diameter from the table. Use the listed 10 × OD bend radius when checking the selected route.
Standards
TEBAOFLEX UL 3123 wire is UL-certified appliance wiring material.
| Item | Requirement or reference |
|---|---|
| Certification | UL-certified AWM |
| Style designation | UL 3123 |
| Construction standard | UL 758 — Appliance Wiring Material |
| Style flame classification | Horizontal flame |
Identify the UL style, conductor size, voltage and temperature grade on the purchasing specification. Include the required product identification and certification documents with the enquiry.
Request a cable recommendation and quotation
Send the required services, cable length, mechanical duty, environment, termination and quantity. Our team will review the application before quoting.
- Include the product name or SKU plus the required cable length and quantity.
- Attach a specification, drawing or data sheet when available.

