Product Overview
The Caddock Type MS Power Film Resistors offer a wide resistance range and a maximum operating temperature of +275C, delivering performance capabilities that simplify circuit design and reduce equipment cost and complexity. These resistors provide full power and voltage ratings without derating, featuring non-inductive performance and higher voltage ratings without limitations of minimum wire size and spacing. Built with Caddock's Micronox resistance films, fired onto a ceramic core at high temperatures, they exhibit excellent long-term stability, with typical stability of 0.05% per 1,000 hours. The patented non-inductive serpentine resistive pattern ensures maximum cancellation of flux fields, resulting in faster settling times and minimum distortion in high-frequency circuits. Produced under intensive manufacturing controls, including power conditioning and overvoltage conditioning, these resistors meet stringent quality control requirements and are included in the Caddock Reliability Testing Program.
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.
- Certifications: Approved for conformance to the requirements of Mil-I-45208 in many recent surveys.
- Patents: Certain products are covered by one or more patents; patents are also pending.
Technical Specifications
| Model No. | Power Rating (Watts) at +125C | Power Rating (Watts) at +25C | Resistance Min. () | Resistance Max. () | Max. Voltage (V) | C (inches / mm) | B (inches / mm) | A (inches / mm) |
|---|---|---|---|---|---|---|---|---|
| MS126 | 0.25 | 0.50 | 20 | 1 Meg | 500 | .188 .020 (4.78 .51) | .070 .015 (1.78 .38) | .020 .002 (.51 .05) |
| MS150 | 0.30 | 0.60 | 20 | 2 K | 500 | .188 .020 (4.78 .51) | .070 .015 (1.78 .38) | .020 .002 (.51 .05) |
| MS151 | 0.45 | 0.75 | 20 | 2 Meg | 750 | .250 .020 (6.35 .51) | .094 .015 (2.39 .38) | .025 .002 (.64 .05) |
| MS175 | 0.60 | 1.2 | 20 | 2 K | 750 | .250 .020 (6.35 .51) | .094 .015 (2.39 .38) | .025 .002 (.64 .05) |
| MS176 | 0.60 | 1.8 | 45 | 5 Meg | 750 | .313 .020 (7.95 .51) | .094 .015 (2.39 .38) | .025 .002 (.64 .05) |
| MS210 | 0.75 | 1.8 | 45 | 3 K | 750 | .313 .030 (7.95 .76) | .109 .025 (2.77 .64) | .025 .002 (.64 .05) |
| MS214 | 1.0 | 2.4 | 45 | 5 Meg | 750 | .400 .060 (10.16 1.52) | .140 .030 (3.56 .76) | .025 .002 (.64 .05) |
| MS220 | 1.5 | 3.6 | 20 | 10 Meg | 1,000 | .575 .050 (14.61 1.27) | .165 .030 (4.19 .76) | .032 .002 (.81 .05) |
| MS221 | 1.8 | 4.8 | 45 | 10 Meg | 1,000 | .480 .060 (12.19 1.52) | .230 .030 (5.84 .76) | .040 .002 (1.02 .05) |
| MS223 | 2.4 | 6.0 | 20 | 4 Meg | 1,000 | .950 .060 (24.13 1.52) | .230 .030 (5.84 .76) | .040 .002 (1.02 .05) |
| MS244 | 2.4 | 7.5 | 45 | 15 Meg | 1,000 | .570 .060 (14.48 1.52) | .300 .030 (7.62 .76) | .040 .002 (1.02 .05) |
| MS245 | 3.6 | 9.0 | 20 | 6 Meg | 1,000 | .970 .060 (24.64 1.52) | .300 .030 (7.62 .76) | .040 .002 (1.02 .05) |
| MS260 | 4.8 | 13.2 | 45 | 15 Meg | 1,000 | .910 .060 (23.11 1.52) | .350 .040 (8.89 1.02) | .040 .002 (1.02 .05) |
| MS281 | 6.0 | * | 45 | 8 Meg | 1,000 | 1.250 .070 (31.75 1.78) | .350 .040 (8.89 1.02) | .040 .002 (1.02 .05) |
| MS310 | 7.5 | * | 45 | 20 Meg | 1,000 | 2.000 .080 (50.80 2.03) | .350 .040 (8.89 1.02) | .040 .002 (1.02 .05) |
| MS313 | 9.0 | * | 50 | 30 Meg | 1,000 | 2.000 .080 (50.80 2.03) | .350 .040 (8.89 1.02) | .040 .002 (1.02 .05) |
| MS315 | * | * | 50 | 1 Meg | 1,000 | 3.000 .090 (76.20 2.29) | .350 .040 (8.89 1.02) | .040 .002 (1.02 .05) |
| MS322 | 13.2 | 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
Ordering Information Example: MS220 -100K - 1% (Model Number - Resistor Value - Tolerance)
Derating Curve: The derating curve indicates power rating reduction based on ambient temperature. Curve A applies to all MS models except MS126, MS151, MS176. Curve B applies to MS126, MS151, MS176.
Note: Models with low inductance construction are in shaded areas. Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
2411071512_Caddock-MS260-5-00K-1-_C19415987.pdf
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