Name: UL 1659 PTFE Lead Wire 250°C 600V, Nickel-Plated Copper
Brand: TEBAOFLEX

Product overview

UL 1659 is the UL wire style for 600 V, 250 °C lead wire. TEBAOFLEX builds it with a 0.5 mm (0.020 in) PTFE wall over stranded, soft-annealed, nickel-plated copper, in eight sizes from 24 AWG to 10 AWG with nominal overall diameters from 1.7 mm to 3.9 mm.

Choose UL 1659 for flexible leads and internal wiring in electronic equipment and appliances that run continuously at high temperature or meet chemicals and fluids. The soft-annealed strands keep the lead easy to bend and route, and the nickel plating protects the copper at 250 °C.

Browse the UL style wire category for the other PTFE, FEP, silicone and XLPE styles or download the UL 1659 datasheet (PDF).

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Application & Features

Selection overview

UL 1659 is used as lead wire and internal wiring in electronic and appliance equipment that runs continuously at up to 250 °C: leads from heating elements, motors and sensors to terminal blocks, and connections inside control and power electronics that sit close to hot parts. The PTFE wall stands up to the cleaning agents, oils and other fluids met in service.

Within the TEBAOFLEX PTFE range, compare UL 1570 for a 600 V, 250 °C wire with abrasion-resistant mineral-filled PTFE, UL 1815 for 300 V, 250 °C appliance and electronic wiring with silver-plated or nickel-plated copper, and UL 1199 where a 200 °C, 600 V rating with silver-plated copper is enough.

250 °C continuousFor leads that run next to heating elements, windings and other hot components.
600 V ratingCovers mains appliance circuits and higher-voltage electronic wiring.
Nickel-plated copperSoft-annealed strands with plating that protects the copper at high temperature.
Chemical resistancePTFE insulation that resists chemicals and fluids.

Stator of a small brushless DC motor with copper windings on a circuit board and a bundle of coloured lead wires leaving the housing, where lead wire connects a motor to its equipment — Small motors and electronic assemblies bring their connections out on colour-coded lead wires; where those leads run hot, a 600 V, 250 °C PTFE lead wire such as UL 1659 is used. Photo: Medvedev, CC BY-SA 3.0, via Wikimedia Commons.

Specifications

Technical data

Nominal values for UL 1659 constructions. The final construction is confirmed on the TEBAOFLEX datasheet issued with your quotation.

Electrical, thermal and material data

Parameter	Value
Voltage rating	600 V
Temperature rating	250 °C, continuous use
Conductor	Soft-annealed, nickel-plated copper
Insulation	Polytetrafluoroethylene (PTFE)
Protection	PTFE insulation with excellent chemical and fluid resistance
Chemical resistance	Excellent
Performance	Flexible high-temperature lead wire with excellent durability
Colours	A variety of insulation colours available
Wire style	UL AWM style 1659; CSA AWM I A/B
Flame test	FT1
Application	Electronic and appliance applications

Dimensions and weights

AWG	Stranding	Insulation thickness	Nominal O.D.	Approx. weight	Rating
24	19/36	0.020 in / 0.5 mm	0.068 in / 1.7 mm	4 lb / 7 kg/km	250 °C
22	19/34	0.020 in / 0.5 mm	0.074 in / 1.9 mm	6 lb / 9 kg/km	250 °C
20	19/32	0.020 in / 0.5 mm	0.083 in / 2.1 mm	8 lb / 12 kg/km	250 °C
18	19/30	0.020 in / 0.5 mm	0.093 in / 2.4 mm	11 lb / 16 kg/km	250 °C
16	19/29	0.020 in / 0.5 mm	0.099 in / 2.5 mm	13 lb / 19 kg/km	250 °C
14	19/27	0.020 in / 0.5 mm	0.111 in / 2.8 mm	18 lb / 26 kg/km	250 °C
12	19/25	0.020 in / 0.5 mm	0.130 in / 3.3 mm	26 lb / 39 kg/km	250 °C
10	37/26	0.020 in / 0.5 mm	0.154 in / 3.9 mm	38 lb / 56 kg/km	250 °C

Selection note: All dimensions and weights are nominal and subject to manufacturing tolerances. Before ordering, ask our engineers to confirm the conductor resistance, the minimum bending radius, the current rating for your installation, the UL, CSA and FT1 marking and the put-up lengths you need.

Standards & References

Applicable standards and compliance

Wire styleUL 1659 single-conductor lead wire, 600 V and 250 °C, with CSA AWM I A/B as the corresponding CSA designation.
Flame testFT1 flame-test designation; the marking printed on your wire is agreed with the quotation.
ConductorSoft-annealed, nickel-plated copper: 19 strands from 24 AWG (19/36) to 12 AWG (19/25) and 37 strands (37/26) at 10 AWG.
Voltage scope600 V for electronic and appliance wiring at continuous temperatures up to 250 °C.
ApprovalsUL style, CSA and flame-test markings for your order are confirmed and quoted per order.

Construction

Material and build-up

UL 1659 is a single-conductor lead wire with two layers: a stranded, soft-annealed, nickel-plated copper conductor and one PTFE wall.

Conductor: soft-annealed copper strands with nickel plating; the annealed temper keeps the lead flexible, and the plating protects the copper at 250 °C.
Stranding: 19 strands from 24 AWG to 12 AWG and 37 strands at 10 AWG, as listed in the size table.
Insulation: polytetrafluoroethylene (PTFE), 0.5 mm (0.020 in) thick on every size, with excellent chemical and fluid resistance.
Identification: a variety of insulation colours; the UL or CSA marking for your order is agreed with the quotation.

FAQ

Selection questions

What is UL 1659 wire?

UL 1659 is a UL wire style for 600 V, 250 °C lead wire. The TEBAOFLEX version has PTFE insulation over soft-annealed, nickel-plated stranded copper, in sizes from 24 AWG to 10 AWG, for electronic and appliance applications with continuous use up to 250 °C.

How is UL 1659 different from UL 1570 and UL 1815?

All three are 250 °C PTFE wires. UL 1659 has plain PTFE over nickel-plated copper and is rated 600 V. UL 1570 is also rated 600 V but adds a mineral filler to the PTFE for abrasion resistance, and UL 1815 is a 300 V wire with silver-plated or nickel-plated copper for appliance and electronic equipment wiring.

Is UL 1659 flexible enough for leads?

Yes. The conductor is soft-annealed copper with 19 strands from 24 AWG to 12 AWG and 37 strands at 10 AWG, so the lead bends and routes easily. Tell us the smallest bend and any repeated movement in your design, and our engineers confirm the construction.

What should I send for a quotation?

Send the UL style, AWG size, insulation colour, put-up length, quantity and any UL, CSA or FT1 marking requirement. Our engineers confirm the construction on the datasheet issued with your quotation.

Request a quote

Request this cable.

Send the UL style, AWG size, insulation colour, put-up length, quantity and marking requirement, and we will confirm the construction and quote.

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Contact directly

Talk to our cable team.

WAWhatsApp+86 156 3992 7303 @Emailinfo@tebaoflexcablegroup.com

UL 1659 PTFE Lead Wire 250°C 600V, Nickel-Plated Copper

Application & Features