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. These resistors deliver full power and voltage ratings without derating, providing non-inductive performance and extending the critical resistance value. They feature higher voltage ratings without minimum wire size limitations and exhibit excellent long-term stability, with typical stability of 0.05% per 1,000 hours. Constructed with Caddock's proprietary Micronox complex metal oxide resistance films fired onto a ceramic core, and utilizing a patented non-inductive serpentine resistive pattern, these resistors are ideal for high-frequency circuits requiring faster settling times and minimum distortion. They are manufactured under intensive controls, including power, overvoltage, and maximum temperature conditioning, and are included in the Caddock Reliability Testing Program.
Product Attributes
- Brand: Caddock Electronics, Inc.
- Resistance Film: Micronox
- Core Material: 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.
- Certifications/Approvals: Conformance to Mil-I-45208 requirements approved in many recent surveys.
- Manufacturing Control: Intensive manufacturing controls, including power conditioning, overvoltage conditioning, and maximum temperature conditioning.
- Reliability: Included in Caddock Reliability Testing Program (Extended Life, Shock, Vibration, Humidity verification).
Technical Specifications
| Model No. | Power Rating (Watts at +125C) | Power Rating (Watts at +25C) | Resistance Min. | Resistance Max. | Max. Voltage (V) | Dielectric Strength (V) | Dimensions (inches tolerance) | Dimensions (mm tolerance) | B (inches tolerance) | B (mm tolerance) | C (inches tolerance) | C (mm tolerance) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MS126 | 0.25 | 0.50 | 20 | 1 Meg | 200 | 500 | .020 .002 | .51 .05 | .070 .015 | 1.78 .38 | .188 .020 | 4.78 .51 |
| MS150 | 0.50 | 1.00 | 20 | 2 K | 200 | 500 | .020 .002 | .51 .05 | .070 .015 | 1.78 .38 | .188 .020 | 4.78 .51 |
| MS151 | 0.50 | 1.00 | 20 | 2 Meg | 300 | 750 | .025 .002 | .64 .05 | .094 .015 | 2.39 .38 | .250 .020 | 6.35 .51 |
| MS175 | 0.75 | 1.50 | 20 | 2 K | 300 | 750 | .025 .002 | .64 .05 | .094 .015 | 2.39 .38 | .250 .020 | 6.35 .51 |
| MS176 | 0.75 | 1.50 | 45 | 5 Meg | 500 | 750 | .025 .002 | .64 .05 | .094 .015 | 2.39 .38 | .313 .020 | 7.95 .51 |
| MS210 | 1.0 | 2.00 | 45 | 3 K | 500 | 750 | .025 .002 | .64 .05 | .109 .025 | 2.77 .64 | .313 .030 | 7.95 .76 |
| MS214 | 1.0 | 2.00 | 45 | 5 Meg | 500 | 750 | .025 .002 | .64 .05 | .140 .030 | 3.56 .76 | .400 .060 | 10.16 1.52 |
| MS220 | 2.0 | 4.00 | 20 | 10 Meg | 1,000 | 800 | .032 .002 | .81 .05 | .165 .030 | 4.19 .76 | .575 .050 | 14.61 1.27 |
| MS221 | 3.0 | 6.00 | 45 | 10 Meg | 1,000 | 800 | .040 .002 | 1.02 .05 | .230 .030 | 5.84 .76 | .480 .060 | 12.19 1.52 |
| MS223 | 3.0 | 6.00 | 20 | 4 Meg | 800 | 1,000 | .040 .002 | 1.02 .05 | .230 .030 | 5.84 .76 | .950 .060 | 24.13 1.52 |
| MS244 | 4.0 | 8.00 | 45 | 15 Meg | 2,000 | 1,000 | .040 .002 | 1.02 .05 | .300 .030 | 7.62 .76 | .570 .060 | 14.48 1.52 |
| MS245 | 4.0 | 8.00 | 20 | 6 Meg | 800 | 1,000 | .040 .002 | 1.02 .05 | .300 .030 | 7.62 .76 | .970 .060 | 24.64 1.52 |
| MS260 | 6.0 | 12.00 | 45 | 15 Meg | 2,000 | 1,000 | .040 .002 | 1.02 .05 | .350 .040 | 8.89 1.02 | .910 .060 | 23.11 1.52 |
| MS281 | 8.0 | 16.00 | 45 | 8 Meg | 2,000 | 1,000 | .040 .002 | 1.02 .05 | .350 .040 | 8.89 1.02 | 1.250 .070 | 31.75 1.78 |
| MS310 | 10.0 | 20.00 | 45 | 20 Meg | 4,500 | 1,000 | .040 .002 | 1.02 .05 | .350 .040 | 8.89 1.02 | 2.000 .080 | 50.80 2.03 |
| MS313 | 12.5 | 25.00 | 50 | 30 Meg | 6,000 | 1,000 | .040 .002 | 1.02 .05 | .350 .040 | 8.89 1.02 | 2.000 .080 | 50.80 2.03 |
| MS315 | 15.0 | 30.00 | 50 | 1 Meg | * | 1,000 | .040 .002 | 1.02 .05 | .350 .040 | 8.89 1.02 | 3.000 .090 | 76.20 2.29 |
| MS322 | 22.0 | * | 100 | 1.5 Meg | * | 1,000 | .040 .002 | 1.02 .05 | .350 .040 | 8.89 1.02 | * | * |
Specifications:
- Resistance Tolerance: 1% (tolerances to 0.1% on special order)
- Temperature Coef cient: 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
Derating Curve:
A - all MS models except MS126, MS151, MS176
B - MS126, MS151, MS176
Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
Ordering Information Example: MS220 -100K - 1% (Model Number - Resistor Value - Tolerance)
2411181757_Caddock-MS244-100-1-_C20484231.pdf
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