Product Overview
The Caddock Type MS Power Film Resistors are axial-lead resistors 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 extend the critical resistance value up to 10 times. Constructed with Caddock's proprietary Micronox resistance films fired onto a ceramic core, they exhibit excellent long-term stability (typically 0.05% per 1,000 hours) and are manufactured under intensive controls, including power conditioning and overvoltage conditioning. The patented non-inductive serpentine resistive pattern ensures maximum cancellation of flux fields, leading to faster settling times and minimum distortion in high-frequency circuits. These resistors are included in the Caddock Reliability Testing Program and conform to Mil-I-45208 requirements.
Product Attributes
- Brand: Caddock Electronics, Inc.
- Product Family: Type MS Power Film Resistors
- 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 specific models.
- Certifications/Approvals: Conformance to Mil-I-45208 requirements (in many recent surveys); included in Caddock Reliability Testing Program (Extended Life, Shock, Vibration, Humidity).
- Origin: USA
Technical Specifications
| Model No. | Power Rating (Watts at +125C) | Power Rating (Watts at +25C) | Resistance Min. () | Resistance Max. () | Max. Voltage (V) | Dimensions B (in / mm) | Dimensions A (in / mm) | Dimensions C (in / mm) |
|---|---|---|---|---|---|---|---|---|
| MS126 | 0.25 | 0.50 | 20 | 1 Meg | 500 | .070 .015 (1.78 .38) | .188 .020 (4.78 .51) | 1.500 .125 (38.10 3.18) |
| MS150 | 0.30 | 0.50 | 20 | 2 K | 500 | .070 .015 (1.78 .38) | .188 .020 (4.78 .51) | 1.500 .125 (38.10 3.18) |
| MS151 | 0.45 | 0.50 | 20 | 2 Meg | 750 | .094 .015 (2.39 .38) | .250 .020 (6.35 .51) | 1.500 .125 (38.10 3.18) |
| MS175 | 0.60 | 0.75 | 20 | 2 K | 750 | .094 .015 (2.39 .38) | .250 .020 (6.35 .51) | 1.500 .125 (38.10 3.18) |
| MS176 | 0.60 | 0.75 | 45 | 5 Meg | 750 | .094 .015 (2.39 .38) | .313 .020 (7.95 .51) | 1.500 .125 (38.10 3.18) |
| MS210 | 1.2 | 1.0 | 45 | 3 K | 750 | .109 .025 (2.77 .64) | .313 .030 (7.95 .76) | 1.500 .125 (38.10 3.18) |
| MS214 | 1.8 | 1.0 | 45 | 5 Meg | 750 | .140 .030 (3.56 .76) | .400 .060 (10.16 1.52) | 1.500 .125 (38.10 3.18) |
| MS220 | 1.8 | 2.0 | 20 | 10 Meg | 1,000 | .165 .030 (4.19 .76) | .575 .050 (14.61 1.27) | 1.500 .125 (38.10 3.18) |
| MS221 | 2.4 | 3.0 | 45 | 10 Meg | 1,000 | .230 .030 (5.84 .76) | .480 .060 (12.19 1.52) | 1.500 .125 (38.10 3.18) |
| MS223 | 2.4 | 3.0 | 20 | 4 Meg | 1,000 | .230 .030 (5.84 .76) | .950 .060 (24.13 1.52) | 1.500 .125 (38.10 3.18) |
| MS244 | 3.6 | 4.0 | 45 | 15 Meg | 2,000 | .300 .030 (7.62 .76) | .570 .060 (14.48 1.52) | 1.500 .125 (38.10 3.18) |
| MS245 | 4.8 | 4.0 | 20 | 6 Meg | 1,000 | .300 .030 (7.62 .76) | .970 .060 (24.64 1.52) | 1.500 .125 (38.10 3.18) |
| MS260 | 6.0 | 6.0 | 45 | 15 Meg | 2,000 | .350 .040 (8.89 1.02) | .910 .060 (23.11 1.52) | 1.500 .125 (38.10 3.18) |
| MS281 | 7.5 | 8.0 | 45 | 8 Meg | 2,000 | .350 .040 (8.89 1.02) | 1.250 .070 (31.75 1.78) | 1.500 .125 (38.10 3.18) |
| MS310 | 9.0 | 10.0 | 45 | 20 Meg | 4,500 | .350 .040 (8.89 1.02) | 2.000 .080 (50.80 2.03) | 1.500 .125 (38.10 3.18) |
| MS313 | 12.5 | 10.0 | 50 | 30 Meg | 6,000 | .350 .040 (8.89 1.02) | 2.000 .080 (50.80 2.03) | 1.500 .125 (38.10 3.18) |
| MS315 | 15.0 | 10.0 | 50 | 1 Meg | 1,000 | .350 .040 (8.89 1.02) | 3.000 .090 (76.20 2.29) | 1.500 .125 (38.10 3.18) |
| MS322 | * | 22.0 | 100 | 1.5 Meg | 1,000 | .350 .040 (8.89 1.02) | 3.000 .090 (76.20 2.29) | 1.500 .125 (38.10 3.18) |
- 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
- Dielectric Strength: Varies by model (see table)
- Lead Diameter: .020 .002 (.51 .05) for MS126, MS150, MS151, MS175, MS176, MS210; .025 .002 (.64 .05) for MS175, MS176, MS210; .032 .002 (.81 .05) for MS220; .040 .002 (1.02 .05) for MS221, MS223, MS244, MS245, MS260, MS281, MS310, MS313, MS315, MS322.
* Limited by power rating.
Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas of the specification table.
2411181757_Caddock-MS220-1-00K-1-_C20482826.pdf
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