Non inductive Caddock MS220-1.00M-1% power film resistor with nickel alloy end

Product Specification

Product Overview

The Caddock Type MS Power Film Resistors are designed for high-performance applications, offering a wide resistance range and a maximum operating temperature of +275C. These resistors deliver full power and voltage ratings without derating, featuring non-inductive performance and extended critical resistance values. Built with Caddock's proprietary Micronox resistance films fired onto a ceramic core, they provide exceptional long-term stability, even under high ambient temperatures, thermal shock, and high power densities. The patented non-inductive serpentine resistive pattern ensures maximum flux field cancellation, leading to faster settling times and minimal distortion in high-frequency circuits. Manufactured under intensive controls and subjected to rigorous reliability testing, Type MS resistors are ideal for simplifying circuit design and reducing equipment cost and complexity.

Product Attributes

• Brand: Caddock Electronics, Inc.
• Resistance Film: Micronox (complex metal oxide)
• Core Material: High strength solid ceramic
• End Caps: Nickel alloy
• Lead Material: Nickel Clad Copper with thin Gold Plate (solderable); optional pure nickel leads available for welding applications on specific models.
• Encapsulation: High Temperature Silicone Conformal
• Certifications/Approvals: Conformance to Mil-I-45208 approved procedures (in many recent surveys); included in Caddock Reliability Testing Program (Extended Life, Shock, Vibration, Humidity verified).
• Construction: Non-Inductive serpentine resistive pattern (most models)

Technical Specifications

Specifications:

• Resistance Tolerance: 1% (tolerances to 0.1% on special order)
• Temperature Coefficient: 50 ppm/C (referenced to +25C, R taken at -15C and +105C)
• Insulation Resistance: 10,000 Megohms, min.
• Overload/Overvoltage: 5 times rated power with applied voltage not to exceed 1.5 times maximum continuous operating voltage for 5 seconds. R 0.5% max. or 0.5 ohm max., whichever is greater.
• Thermal Shock: Mil-Std-202, Method 107, Cond. C, R 0.5% max. or 0.5 ohm max., whichever is greater.
• Moisture Resistance: Mil-Std-202, Method 106, R 0.5% max. or 0.5 ohm max., whichever is greater.
• Load Life: 1,000 hours at rated power at +25C or +125C (see derating curve), not to exceed rated voltage, R 0.5% max. or 0.5 ohm max., whichever is greater. Mounting method per Mil-R-39007, para. 4.7.2 "conditioning".
• Maximum Operating Temperature: +275C
• Dielectric Strength: Varies by model (see table)

Derating Curve:

A derating curve is provided, indicating power and voltage ratings as a percentage of ambient temperature. Type A applies to all MS models except MS126, MS151, MS176. Type B applies to MS126, MS151, MS176.

Ordering Information Example: MS220 -100K - 1% (Model Number - Resistor Value - Tolerance)

Note: Models with low inductance construction are indicated in shaded areas in the provided diagrams. Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.