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. 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 support high resistance values. Utilizing Caddock's proprietary Micronox resistance films fired onto a ceramic core, these resistors deliver excellent long-term stability (0.05% per 1,000 hours typical) and outstanding performance under high ambient temperatures, thermal shock, and high power densities. The patented non-inductive serpentine resistive pattern ensures maximum flux field cancellation, resulting in fast settling times and minimal distortion in high-frequency circuits. Manufactured under intensive controls, including power conditioning and overvoltage conditioning, and subjected to rigorous quality control and reliability verification, Type MS resistors are built for demanding applications.
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 on specific models.
- Encapsulation: High Temperature Silicone Conformal
- Certifications/Approvals: Conformance to Mil-I-45208 requirements (in many recent surveys); included in Caddock Reliability Testing Program.
- Origin: USA (implied by address)
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 (B) (inches/mm) | Dimensions (A) (inches/mm) | Dimensions (C) (inches/mm) |
|---|---|---|---|---|---|---|---|---|---|
| MS126 | 0.25 | 0.30 | 20 | 1 Meg | 200 | 500 | .070 .015 (1.78 .38) | .188 .020 (4.78 .51) | .020 .002 (.51 .05) |
| MS150 | 0.50 | 0.60 | 20 | 2 K | 300 | 500 | .070 .015 (1.78 .38) | .188 .020 (4.78 .51) | .020 .002 (.51 .05) |
| MS151 | 0.50 | 0.60 | 20 | 2 Meg | 300 | 750 | .094 .015 (2.39 .38) | .250 .020 (6.35 .51) | .025 .002 (.64 .05) |
| MS175 | 0.75 | 0.45 | 20 | 2 K | 500 | 750 | .094 .015 (2.39 .38) | .250 .020 (6.35 .51) | .025 .002 (.64 .05) |
| MS176 | 0.75 | 0.60 | 45 | 5 Meg | 500 | 750 | .094 .015 (2.39 .38) | .313 .020 (7.95 .51) | .025 .002 (.64 .05) |
| MS210 | 1.0 | 1.2 | 45 | 3 K | 500 | 750 | .109 .025 (2.77 .64) | .313 .030 (7.95 .76) | .025 .002 (.64 .05) |
| MS214 | 1.0 | 1.8 | 45 | 5 Meg | 500 | 750 | .140 .030 (3.56 .76) | .400 .060 (10.16 1.52) | .025 .002 (.64 .05) |
| MS220 | 2.0 | 2.4 | 20 | 10 Meg | 1,000 | 800 | .165 .030 (4.19 .76) | .575 .050 (14.61 1.27) | .032 .002 (.81 .05) |
| MS221 | 3.0 | 3.6 | 45 | 10 Meg | 1,000 | 800 | .230 .030 (5.84 .76) | .480 .060 (12.19 1.52) | .040 .002 (1.02 .05) |
| MS223 | 3.0 | 4.8 | 20 | 4 Meg | 800 | 1,000 | .230 .030 (5.84 .76) | .950 .060 (24.13 1.52) | .040 .002 (1.02 .05) |
| MS244 | 4.0 | 6.0 | 45 | 15 Meg | 2,000 | 1,000 | .300 .030 (7.62 .76) | .570 .060 (14.48 1.52) | .040 .002 (1.02 .05) |
| MS245 | 4.0 | 7.5 | 20 | 6 Meg | 800 | 1,000 | .300 .030 (7.62 .76) | .970 .060 (24.64 1.52) | .040 .002 (1.02 .05) |
| MS260 | 6.0 | 9.0 | 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 | 8.0 | 13.2 | 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 | 10.0 | 15.0 | 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 | 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 | 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 | 22.0 | * | 100 | 1.5 Meg | * | 1,000 | .350 .040 (8.89 1.02) | * | .040 .002 (1.02 .05) |
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
Derating Curve:
Ordering Information Example: MS220 -100K - 1% (Model Number - Resistor Value - Tolerance)
Note: Models with low inductance construction are in shaded areas. Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
2411181757_Caddock-MS244-1-00K-1-_C20483896.pdf
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