Caddock Type MS Power Film Resistors
Product Overview
The Caddock Type MS Power Film Resistors are axial-lead resistors designed for high-performance applications, offering a wide resistance range and a maximum operating temperature of +275C. With power ratings up to 22 Watts and voltage ratings as high as 6,000 volts, these resistors simplify circuit design and reduce equipment cost and complexity. They provide full power and voltage ratings without derating, feature non-inductive performance, and offer higher voltage ratings without the limitations of minimum wire size and spacing. The resistors utilize Caddock's proprietary Micronox resistance films, fired onto a ceramic core, ensuring excellent long-term stability of 0.05% per 1,000 hours. The patented non-inductive serpentine resistive pattern maximizes flux field cancellation, resulting in faster settling times and minimum distortion in high-frequency circuits. Manufactured under intensive controls and included in the Caddock Reliability Testing Program, these resistors meet stringent quality and reliability standards.
Product Attributes
- Brand: Caddock Electronics, Inc.
- Resistance Film: Micronox
- Core Material: High strength solid ceramic
- Encapsulation: High Temperature Silicone Conformal
- Lead Material: Nickel Clad Copper with thin Gold Plate (solderable); optional pure nickel leads available for welding applications on specific models.
- Manufacturing Control: Approved for conformance to Mil-I-45208 requirements.
- Reliability Verification: Included in Caddock Reliability Testing Program (Extended Life, Shock, Vibration, Humidity).
Technical Specifications
| Model No. | Rated Power (Watts) at +125C | Rated Power (Watts) at +25C | Max. Voltage (Volts) | Resistance Min. () | Resistance Max. () | Dimensions (L x Dia in inches (mm)) |
|---|---|---|---|---|---|---|
| MS126 | 0.25 | 0.50 | 500 | 20 | 1 Meg | .188 .020 (4.78 .51) x .070 .015 (1.78 .38) |
| MS150 | 0.50 | 1.0 | 500 | 20 | 2 K | .250 .020 (6.35 .51) x .094 .015 (2.39 .38) |
| MS151 | 0.50 | 1.0 | 750 | 20 | 2 Meg | .250 .020 (6.35 .51) x .094 .015 (2.39 .38) |
| MS175 | 0.75 | 1.5 | 750 | 20 | 2 K | .313 .020 (7.95 .51) x .094 .015 (2.39 .38) |
| MS176 | 0.75 | 1.5 | 750 | 45 | 5 Meg | .313 .020 (7.95 .51) x .094 .015 (2.39 .38) |
| MS210 | 1.0 | 2.0 | 750 | 45 | 3 K | .313 .030 (7.95 .76) x .109 .025 (2.77 .64) |
| MS214 | 1.0 | 2.0 | 750 | 45 | 5 Meg | .400 .060 (10.16 1.52) x .140 .030 (3.56 .76) |
| MS220 | 2.0 | 4.0 | 800 | 20 | 10 Meg | .575 .050 (14.61 1.27) x .165 .030 (4.19 .76) |
| MS221 | 3.0 | 6.0 | 800 | 45 | 10 Meg | .480 .060 (12.19 1.52) x .230 .030 (5.84 .76) |
| MS223 | 3.0 | 6.0 | 1,000 | 20 | 4 Meg | .950 .060 (24.13 1.52) x .230 .030 (5.84 .76) |
| MS244 | 4.0 | 8.0 | 1,000 | 45 | 15 Meg | .570 .060 (14.48 1.52) x .300 .030 (7.62 .76) |
| MS245 | 4.0 | 8.0 | 1,000 | 20 | 6 Meg | .970 .060 (24.64 1.52) x .300 .030 (7.62 .76) |
| MS260 | 6.0 | 12.0 | 1,000 | 45 | 15 Meg | .910 .060 (23.11 1.52) x .350 .040 (8.89 1.02) |
| MS281 | 8.0 | 16.0 | 1,000 | 45 | 8 Meg | 1.250 .070 (31.75 1.78) x .350 .040 (8.89 1.02) |
| MS310 | 10.0 | 20.0 | 1,000 | 45 | 20 Meg | 2.000 .080 (50.80 2.03) x .350 .040 (8.89 1.02) |
| MS313 | 12.5 | 25.0 | 1,000 | 50 | 30 Meg | 2.000 .080 (50.80 2.03) x .350 .040 (8.89 1.02) |
| MS315 | 15.0 | 30.0 | 1,000 | 50 | 1 Meg | 3.000 .090 (76.20 2.29) x .350 .040 (8.89 1.02) |
| MS322 | 22.0 | * | 1,000 | 100 | 1.5 Meg | * |
General 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
* Limited by power rating.
Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
2411041705_Caddock-MS310-1-00K-1-_C20481889.pdf
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