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 axial-lead resistors deliver power ratings up to 22 Watts and voltage ratings as high as 6,000 volts, with values extending to 30 Megohms. They provide full power and voltage ratings without derating, featuring non-inductive performance and enhanced high resistance capabilities. Built with Caddock's proprietary Micronox resistance films fired onto a ceramic core, these resistors exhibit exceptional long-term stability, with typical stability of 0.05% per 1,000 hours. The patented serpentine pattern ensures efficient non-inductive construction, leading to faster settling times and minimal distortion in high-frequency circuits. Rigorous manufacturing controls, including power conditioning and overvoltage conditioning, ensure reliability and conformance to Mil-I-45208 requirements.
Product Attributes
- Brand: Caddock Electronics, Inc.
- Resistance Film: Micronox
- 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 (Models MS126, MS150, MS151, MS175, MS176, MS210).
- Encapsulation: High Temperature Silicone Conformal
- Certifications: Approved for conformance to the requirements of Mil-I-45208.
- Construction: Patented Non-Inductive serpentine resistive pattern.
Technical Specifications
| Model No. | Power (Watts) at +125C | Power (Watts) at +25C | Resistance Min. | Resistance Max. | Max. Voltage (Volts) | Dimensions (L x Dia) in inches (mm) |
|---|---|---|---|---|---|---|
| MS126 | 0.25 | 0.50 | 20 | 1 Meg | 500 | .188 .020 (4.78 .51) |
| MS150 | 0.50 | 1.00 | 20 | 2 K | 500 | .188 .020 (4.78 .51) |
| MS151 | 0.50 | 1.00 | 20 | 2 Meg | 750 | .250 .020 (6.35 .51) |
| MS175 | 0.75 | 1.50 | 20 | 2 K | 750 | .250 .020 (6.35 .51) |
| MS176 | 0.75 | 1.50 | 45 | 5 Meg | 750 | .313 .020 (7.95 .51) |
| MS210 | 1.0 | 2.00 | 45 | 3 K | 750 | .313 .030 (7.95 .76) |
| MS214 | 1.0 | 2.00 | 45 | 5 Meg | 750 | .400 .060 (10.16 1.52) |
| MS220 | 2.0 | 4.00 | 20 | 10 Meg | 1,000 | .575 .050 (14.61 1.27) |
| MS221 | 3.0 | 6.00 | 45 | 10 Meg | 1,000 | .480 .060 (12.19 1.52) |
| MS223 | 3.0 | 6.00 | 20 | 4 Meg | 1,000 | .950 .060 (24.13 1.52) |
| MS244 | 4.0 | 8.00 | 45 | 15 Meg | 1,000 | .570 .060 (14.48 1.52) |
| MS245 | 4.0 | 8.00 | 20 | 6 Meg | 1,000 | .970 .060 (24.64 1.52) |
| MS260 | 6.0 | 12.00 | 45 | 15 Meg | 1,000 | .910 .060 (23.11 1.52) |
| MS281 | 8.0 | 16.00 | 45 | 8 Meg | 1,000 | 1.250 .070 (31.75 1.78) |
| MS310 | 10.0 | 20.00 | 45 | 20 Meg | 1,000 | 2.000 .080 (50.80 2.03) |
| MS313 | 12.5 | 25.00 | 50 | 30 Meg | 1,000 | 2.000 .080 (50.80 2.03) |
| MS315 | 15.0 | 30.00 | 50 | 1 Meg | 1,000 | 3.000 .090 (76.20 2.29) |
| MS322 | 22.0 | 44.00 | 100 | 1.5 Meg | 1,000 | * |
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, showing power rating reduction based on ambient temperature. Curve A applies to all MS models except MS126, MS151, MS176. Curve B applies to MS126, MS151, MS176.
Ordering Information Example: MS220 -100K - 1% (Model Number - Resistor Value - Tolerance)
2411181757_Caddock-MS310-10-0M-1-_C20484368.pdf
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