Product Overview
The Caddock Type MS Power Film Resistors offer a wide resistance range and exceptional performance capabilities, designed to simplify circuit design and reduce equipment cost and complexity. 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 the limitations of minimum wire size and spacing, and exhibit excellent long-term stability with typical performance of 0.05% per 1,000 hours. Constructed with Caddock's proprietary Micronox complex metal oxide resistance films, fired onto a ceramic core at high temperatures, these resistors offer outstanding stability under demanding conditions. The patented non-inductive serpentine resistive pattern ensures maximum cancellation of flux fields, resulting in a truly non-inductive resistor with faster settling times and minimal distortion in high-frequency circuits. Produced under intensive manufacturing controls and rigorous quality assurance procedures, including conformance to Mil-I-45208 requirements, Type MS resistors are included in the Caddock Reliability Testing Program to verify performance across various environmental stresses.
Product Attributes
- Brand: Caddock Electronics, Inc.
- Product Family: Type MS Power Film Resistors
- Resistance Film: Micronox (complex metal oxide)
- 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/Standards: Conformance to Mil-I-45208 requirements (approved in many recent surveys); Mil-Std-202, Method 107 (Thermal Shock); Mil-Std-202, Method 106 (Moisture Resistance); Mil-R-39007, para. 4.7.2 (conditioning for Load Life).
- Origin: USA (Roseburg, Oregon)
Technical Specifications
| Model No. | Power Rating (Watts at +125C) | Power Rating (Watts at +25C) | Max. Voltage (Volts) | Resistance Min. () | Resistance Max. () | Dimensions (A) (inches .002 / mm .05) | Dimensions (B) (inches .015 / mm .38) | Dimensions (C) (inches .020 / mm .51) |
|---|---|---|---|---|---|---|---|---|
| MS126 | 0.25 | 0.50 | 500 | 20 | 1 Meg | .070 .015 (1.78 .38) | .188 .020 (4.78 .51) | .020 .002 (.51 .05) |
| MS150 | 0.30 | 0.45 | 500 | 20 | 2 K | .070 .015 (1.78 .38) | .188 .020 (4.78 .51) | .020 .002 (.51 .05) |
| MS151 | 0.45 | 0.60 | 750 | 20 | 2 Meg | .094 .015 (2.39 .38) | .250 .020 (6.35 .51) | .025 .002 (.64 .05) |
| MS175 | 0.60 | 0.75 | 750 | 20 | 2 K | .094 .015 (2.39 .38) | .250 .020 (6.35 .51) | .025 .002 (.64 .05) |
| MS176 | 0.60 | 1.2 | 750 | 45 | 5 Meg | .094 .015 (2.39 .38) | .313 .020 (7.95 .51) | .025 .002 (.64 .05) |
| MS210 | 0.90 | 1.8 | 750 | 45 | 3 K | .109 .025 (2.77 .64) | .313 .030 (7.95 .76) | .025 .002 (.64 .05) |
| MS214 | 1.2 | 2.4 | 750 | 45 | 5 Meg | .140 .030 (3.56 .76) | .400 .060 (10.16 1.52) | .025 .002 (.64 .05) |
| MS220 | 1.8 | 3.6 | 800 | 20 | 10 Meg | .165 .030 (4.19 .76) | .575 .050 (14.61 1.27) | .032 .002 (.81 .05) |
| MS221 | 2.4 | 4.8 | 800 | 45 | 10 Meg | .230 .030 (5.84 .76) | .480 .060 (12.19 1.52) | .040 .002 (1.02 .05) |
| MS223 | 2.4 | 3.6 | 1,000 | 20 | 4 Meg | .230 .030 (5.84 .76) | .950 .060 (24.13 1.52) | .040 .002 (1.02 .05) |
| MS244 | 3.6 | 7.5 | 1,000 | 45 | 15 Meg | .300 .030 (7.62 .76) | .570 .060 (14.48 1.52) | .040 .002 (1.02 .05) |
| MS245 | 4.8 | 6.0 | 1,000 | 20 | 6 Meg | .300 .030 (7.62 .76) | .970 .060 (24.64 1.52) | .040 .002 (1.02 .05) |
| MS260 | 6.0 | 9.0 | 1,000 | 45 | 15 Meg | .350 .040 (8.89 1.02) | .910 .060 (23.11 1.52) | .040 .002 (1.02 .05) |
| MS281 | 7.5 | * | 1,000 | 45 | 8 Meg | .350 .040 (8.89 1.02) | 1.250 .070 (31.75 1.78) | .040 .002 (1.02 .05) |
| MS310 | 9.0 | * | 1,000 | 45 | 20 Meg | .350 .040 (8.89 1.02) | 2.000 .080 (50.80 2.03) | .040 .002 (1.02 .05) |
| MS313 | 12.5 | * | 1,000 | 50 | 30 Meg | .350 .040 (8.89 1.02) | 2.000 .080 (50.80 2.03) | .040 .002 (1.02 .05) |
| MS315 | 15.0 | * | 1,000 | 50 | 1 Meg | .350 .040 (8.89 1.02) | 3.000 .090 (76.20 2.29) | .040 .002 (1.02 .05) |
| MS322 | 22.0 | 13.2 | 1,000 | 100 | 1.5 Meg | .350 .040 (8.89 1.02) | * | .040 .002 (1.02 .05) |
* Limited by power rating.
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.
- 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.
Note: Certain products shown may be covered by one or more patents, with others pending.
2411181757_Caddock-MS244-10-0K-1-_C20484389.pdf
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