TT Electronics Semi-Precision Power Wirewound Resistors – NT Wirewound Series

Category: Electronics, Resistors, TT Electronics PLC

Overview

The NT Wirewound Series datasheet describes semi-precision power wirewound resistors offered by TT Electronics. These resistors are designed with weldable and solderable leads, aiming for high thermal conductivity. Utilizing centerless ground ceramic cores, they are tailored for optimal heat distribution and dissipation.

Key Features

Notable features include the availability of non-inductive windings, a silicone coat, an all-welded construction, and compliance with MIL-R-26 ratings. The resistors are presented in a range of resistance values from 0.19 ohms up to 300K ohms and can operate at various wattage ratings, spanning from 0.75 to 14 watts. Resistance tolerance spans from +0.1% to +10%.

Electrical Data & Options

Provided is a comprehensive table, which lists the specifics of the resistor series. It includes the IRC and MIL-R-26 styles, along with the corresponding wattage rating, resistance range, and maximum working voltage. For instance, the T1/2 style resistor has a wattage rating of 0.75 watts with a resistance range between 0.1 to 54.8 ohms, and a maximum working voltage of 109.5 volts. The highest wattage rating in the series is 14 watts for the T10A-56 style, supporting resistance values up to 300K ohms and a working voltage of 2049.4 volts.

Product Variants

Mentioned are radial lead types designated as “TR” and non-inductive variations that can be requested by adding the prefix “N” to the style number. The datasheet also notes that the RWR style is obsolete, with the available parts corresponding to commercial equivalents lacking the burn-in screening mandated by MIL-PRF-39007.

General Information

IRC (a subsidiary of TT electronics plc) reserves the right to change product specifications without notice and disclaims liability for any alterations. The information is considered accurate at the time of printing (January 2010). Contact details for the Wire and Film Technologies Division in Texas, USA, including telephone, fax, and the website, are provided.