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Enameled Wires Description

Polyester - 180 (SPT) Solderable

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Publication Date : 2025-05-12

Polyester - 180 (SPT) Solderable

NEMA STANDARD (NW1000): MW77

IEC STANDARD (60317): 60317-23

FEDERAL SPECIFICATION: JW 1177/ 39


Film insulation composed of modified polyesterimide resins designed to solder at 470°C


Generally made at 24 AWG and finer sizes


More durable than polyurethane insulations

Applications: High temperature relays, transformers, automotive coils


Solderable Polyester Nylon (SPTN)

NEMA STANDARD (NW1000): MW78

IEC STANDARD (60317): NONE

FEDERAL SPECIFICATION: JW 1177/ 40


Dual film composed of modified polyesterimide resins with nylon overcoat


Superior performance where winding stresses may be severe

Designed to solder at 470°C

Generally made in heavier gauge sizes

Applications: Transformers, automotive coils, appliance motors


Colors Available: Red, Green, Natural, Blue, Yellow, Black, Violet, Orange, White, Brown


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