Product Overview
The Caddock Type MS Power Film Resistors are high-performance axial-lead resistors designed for demanding applications. They offer a wide resistance range, high power and voltage ratings, and excellent long-term stability, simplifying circuit design and reducing costs. These resistors are ideal for high-frequency circuits due to their non-inductive construction, which minimizes flux fields and ensures faster settling times. Manufactured under intensive controls using Caddock's proprietary Micronox resistance films, they provide outstanding stability under high ambient temperatures, thermal shock, and high power densities.
Product Attributes
- Brand: Caddock Electronics, Inc.
- 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: Approved for conformance to Mil-I-45208 requirements (in many recent surveys).
- Construction: Patented Non-Inductive serpentine resistive pattern
Technical Specifications
| Model No. | Power Rating (Watts) at +125C | Power Rating (Watts) at +25C | Max. Voltage (Volts) | Resistance Range () Min. | Resistance Range () Max. | Dimensions (inches tolerance) B | Dimensions (inches tolerance) A | Dimensions (inches tolerance) C |
|---|---|---|---|---|---|---|---|---|
| MS126 | 0.25 | 0.50 | 500 | 20 | 1 Meg | .070 .015 (1.78 .38) | .188 .020 (4.78 .51) | 1.500 .125 (38.10 3.18) |
| MS150 | 0.30 | 0.60 | 500 | 20 | 2 K | .070 .015 (1.78 .38) | .188 .020 (4.78 .51) | 1.500 .125 (38.10 3.18) |
| MS151 | 0.45 | 0.75 | 750 | 20 | 2 Meg | .094 .015 (2.39 .38) | .250 .020 (6.35 .51) | 1.500 .125 (38.10 3.18) |
| MS175 | 0.45 | 0.75 | 750 | 20 | 2 K | .094 .015 (2.39 .38) | .250 .020 (6.35 .51) | 1.500 .125 (38.10 3.18) |
| MS176 | 0.60 | 1.2 | 750 | 45 | 5 Meg | .094 .015 (2.39 .38) | .313 .020 (7.95 .51) | 1.500 .125 (38.10 3.18) |
| MS210 | 0.60 | 1.8 | 750 | 45 | 3 K | .109 .025 (2.77 .64) | .313 .030 (7.95 .76) | 1.500 .125 (38.10 3.18) |
| MS214 | 0.60 | 1.8 | 750 | 45 | 5 Meg | .140 .030 (3.56 .76) | .400 .060 (10.16 1.52) | 1.500 .125 (38.10 3.18) |
| MS220 | 1.2 | 2.4 | 800 | 20 | 10 Meg | .165 .030 (4.19 .76) | .575 .050 (14.61 1.27) | 1.500 .125 (38.10 3.18) |
| MS221 | 1.8 | 2.4 | 800 | 45 | 10 Meg | .230 .030 (5.84 .76) | .480 .060 (12.19 1.52) | 1.500 .125 (38.10 3.18) |
| MS223 | 1.8 | 3.6 | 1,000 | 20 | 4 Meg | .230 .030 (5.84 .76) | .950 .060 (24.13 1.52) | 1.500 .125 (38.10 3.18) |
| MS244 | 2.4 | 4.8 | 1,000 | 45 | 15 Meg | .300 .030 (7.62 .76) | .570 .060 (14.48 1.52) | 1.500 .125 (38.10 3.18) |
| MS245 | 2.4 | 4.8 | 1,000 | 20 | 6 Meg | .300 .030 (7.62 .76) | .970 .060 (24.64 1.52) | 1.500 .125 (38.10 3.18) |
| MS260 | 3.6 | 6.0 | 1,000 | 45 | 15 Meg | .350 .040 (8.89 1.02) | .910 .060 (23.11 1.52) | 1.500 .125 (38.10 3.18) |
| MS281 | 4.8 | 7.5 | 1,000 | 45 | 8 Meg | .350 .040 (8.89 1.02) | 1.250 .070 (31.75 1.78) | 1.500 .125 (38.10 3.18) |
| MS310 | 6.0 | 9.0 | 1,000 | 45 | 20 Meg | .350 .040 (8.89 1.02) | 2.000 .080 (50.80 2.03) | 1.500 .125 (38.10 3.18) |
| MS313 | 7.5 | 13.2 | 1,000 | 50 | 30 Meg | .350 .040 (8.89 1.02) | 2.000 .080 (50.80 2.03) | 1.500 .125 (38.10 3.18) |
| MS315 | 9.0 | * | 1,000 | 50 | 1 Meg | .350 .040 (8.89 1.02) | 3.000 .090 (76.20 2.29) | 1.500 .125 (38.10 3.18) |
| MS322 | * | 22.0 | 1,000 | 100 | 1.5 Meg | .350 .040 (8.89 1.02) | 3.000 .090 (76.20 2.29) | 1.500 .125 (38.10 3.18) |
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
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-MS244-50-0-1-_C20481494.pdf
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