Product Overview
The Caddock Type MS Power Film Resistors are designed for high-performance applications, offering a wide resistance range and exceptional stability up to a maximum 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 cost and complexity. They provide full power and voltage ratings without derating, feature non-inductive performance, and extend the critical resistance value. Utilizing Caddock's proprietary Micronox resistance films fired onto a ceramic core, these resistors demonstrate outstanding stability under high ambient temperatures, thermal shock, and high power densities. The patented non-inductive serpentine resistive pattern ensures maximum cancellation of flux fields, resulting in fast settling times and minimal distortion in high-frequency circuits. Manufactured under intensive controls and included in the Caddock Reliability Testing Program, Type MS resistors meet stringent quality and reliability standards.
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 select models.
- Certifications/Approvals: Manufactured under procedures approved for conformance to Mil-I-45208 requirements.
- Construction: Micronox resistance films bonded to a high strength solid ceramic core with nickel alloy end caps and axial leads.
Technical Specifications
| Model No. | Power (Watts) at +125C | Power (Watts) at +25C | Resistance Min. () | Resistance Max. () | Max. Voltage (V) | Dielectric Strength (V) | Dimensions (in) B | Dimensions (in) A | Dimensions (in) C |
|---|---|---|---|---|---|---|---|---|---|
| MS126 | 0.25 | 0.50 | 20 | 1 Meg | 200 | 500 | .070 .015 (1.78 .38) | .188 .020 (4.78 .51) | .020 .002 (.51 .05) |
| MS150 | 0.30 | 0.45 | 20 | 2 K | 200 | 500 | .070 .015 (1.78 .38) | .188 .020 (4.78 .51) | .020 .002 (.51 .05) |
| MS151 | 0.30 | 0.45 | 20 | 2 Meg | 300 | 750 | .094 .015 (2.39 .38) | .250 .020 (6.35 .51) | .025 .002 (.64 .05) |
| MS175 | 0.45 | 0.60 | 20 | 2 K | 300 | 750 | .094 .015 (2.39 .38) | .250 .020 (6.35 .51) | .025 .002 (.64 .05) |
| MS176 | 0.45 | 0.60 | 45 | 5 Meg | 500 | 750 | .094 .015 (2.39 .38) | .313 .020 (7.95 .51) | .025 .002 (.64 .05) |
| MS210 | 0.60 | 1.2 | 45 | 3 K | 500 | 750 | .109 .025 (2.77 .64) | .313 .030 (7.95 .76) | .025 .002 (.64 .05) |
| MS214 | 0.60 | 1.2 | 45 | 5 Meg | 500 | 750 | .140 .030 (3.56 .76) | .400 .060 (10.16 1.52) | .025 .002 (.64 .05) |
| MS220 | 1.8 | 2.4 | 20 | 10 Meg | 1,000 | 800 | .165 .030 (4.19 .76) | .575 .050 (14.61 1.27) | .032 .002 (.81 .05) |
| MS221 | 1.8 | 2.4 | 45 | 10 Meg | 1,000 | 800 | .230 .030 (5.84 .76) | .480 .060 (12.19 1.52) | .040 .002 (1.02 .05) |
| MS223 | 2.4 | 3.6 | 20 | 4 Meg | 800 | 1,000 | .230 .030 (5.84 .76) | .950 .060 (24.13 1.52) | .040 .002 (1.02 .05) |
| MS244 | 2.4 | 4.8 | 45 | 15 Meg | 2,000 | 1,000 | .300 .030 (7.62 .76) | .570 .060 (14.48 1.52) | .040 .002 (1.02 .05) |
| MS245 | 3.6 | 4.8 | 20 | 6 Meg | 800 | 1,000 | .300 .030 (7.62 .76) | .970 .060 (24.64 1.52) | .040 .002 (1.02 .05) |
| MS260 | 4.8 | 6.0 | 45 | 15 Meg | 2,000 | 1,000 | .350 .040 (8.89 1.02) | .910 .060 (23.11 1.52) | .040 .002 (1.02 .05) |
| MS281 | 6.0 | 7.5 | 45 | 8 Meg | 2,000 | 1,000 | .350 .040 (8.89 1.02) | 1.250 .070 (31.75 1.78) | .040 .002 (1.02 .05) |
| MS310 | 7.5 | 9.0 | 45 | 20 Meg | 4,500 | 1,000 | .350 .040 (8.89 1.02) | 2.000 .080 (50.80 2.03) | .040 .002 (1.02 .05) |
| MS313 | 9.0 | 12.5 | 50 | 30 Meg | 6,000 | 1,000 | .350 .040 (8.89 1.02) | 2.000 .080 (50.80 2.03) | .040 .002 (1.02 .05) |
| MS315 | * Limited by power rating. | 15.0 | 50 | 1 Meg | * | 1,000 | .350 .040 (8.89 1.02) | 3.000 .090 (76.20 2.29) | .040 .002 (1.02 .05) |
| MS322 | * Limited by power rating. | 22.0 | 100 | 1.5 Meg | * | 1,000 | .350 .040 (8.89 1.02) | 3.000 .090 (76.20 2.29) | .040 .002 (1.02 .05) |
Specifications:
- Resistance Tolerance: 1% (tolerances to 0.1% on special order).
- Temperature Coefficient: 50 ppm/C. TC 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:
(Note: A visual representation of the derating curve is not possible in text format. The provided text indicates two curves, 'A' and 'B', corresponding to different model groups.)
Ordering Information Example: MS220 -100K - 1% (Model Number - Resistor Value - Tolerance)
Note: Models with Caddock's Non-Inductive Resistance Pattern are indicated in non-shaded areas of the product catalog. Certain products are covered by patents or have patents pending.
2410301851_Caddock-MS244-10-0M-1-_C20484155.pdf
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