Overview
The datasheet details the PC, HR, 4000 Series precision wirewound printed circuit board and radial lead resistors, which offer welded terminations for protection against solder baths and function as heat sinks to further protect terminations. They meet or exceed military specifications MIL-R-93 and MIL-R-39005 ratings.
Key Features
Key features of the resistors include insulated stress-relieved windings, tolerances up to +0.01%, and optional non-inductive windings. With temperature coefficients (TC’s) ranging from +2 ppm/°C to +6000 ppm/°C, these resistors ensure accurate initial calibrations due to an extensive accelerated aging program. The datasheet emphasizes the resistors’ reliable and robust design, offering optional lead materials and lead spacing customized upon request.
Design & Quality Assurance
The resistors are constructed with high-quality, reverse pi-wound wire on high-temp epoxy bobbins, ensuring minimal stress and high structural integrity. Resistor markings are impervious to cleaning solvents, and lead spacing accommodates automated insertion on standard grid boards. Special screening tests, such as short time overload and thermal shock, are available to detect a broad spectrum of potential defects. 100% or sample basis testing to fulfill customer requirements is available upon consultation.
Electrical Specifications
The datasheet lists detailed electrical specifications for different resistor styles, including wattage, resistance range, maximum working voltage, and applicable MIL style numbers. It mentions that commercial ratings may apply at 125°C with a maximal operating temperature limit of 175°C. High Reliability styles come with complete documentation.
Dimensions & Ordering
Dimensions for different resistor styles are measured in inches and millimeters, covering aspects such as length, diameter, and lead spacing. Standard temperature coefficient and lead material (tinned copper weld) information are provided, with notes on optional specifications. For ordering, a sample part number sequence is explained, covering style, characteristics & terminal, resistance temperature characteristic, resistance, tolerance, and TCR.
Contact Information
Wire and Film Technologies, based in Boone, North Carolina, provide their contact details with telephone and fax numbers for further inquiries.
Design Note
The provided diagrams illustrate round and radial forms, providing visuals for component identification and integration.
References:
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