Axial lead resistor Caddock MS220-50.0-1% featuring non inductive serpentine pattern and ceramic core
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. These resistors deliver full power and voltage ratings without derating, providing non-inductive performance and extended critical resistance values. They feature higher voltage ratings without the limitations of minimum wire size and spacing, and exhibit excellent long-term stability with typical drift of 0.05% per 1,000 hours. Constructed with Caddock's proprietary Micronox resistance films fired onto a ceramic core, and utilizing a patented non-inductive serpentine resistive pattern, these resistors ensure maximum flux field cancellation for faster settling times and minimum distortion in high-frequency circuits. They are produced under intensive manufacturing controls, including power conditioning, overvoltage conditioning, and maximum temperature conditioning, and are included in the Caddock Reliability Testing Program. Suitable for demanding circuit designs where cost and complexity reduction are paramount.
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 Coating
- Certifications/Approvals: Conformance to Mil-I-45208 requirements approved in many recent surveys.
- Patents: Certain products covered by one or more patents; patents pending.
- Origin: USA (implied by address)
Technical Specifications
| Model No. | Power (Watts) at +125C | Power (Watts) at +25C | Resistance Min. | Resistance Max. | Max. Voltage (VDC) | Dielectric Strength (VDC) | Dimensions (inches tolerance) | Dimensions (mm tolerance) |
|---|---|---|---|---|---|---|---|---|
| MS126 | 0.25 | 0.50 | 20 | 1 Meg | 200 | 500 | A: .188 .020, B: .070 .015, C: .020 .002 | A: 4.78 .51, B: 1.78 .38, C: .51 .05 |
| MS150 | 0.30 | 0.60 | 20 | 2 K | 200 | 500 | A: .188 .020, B: .070 .015, C: .020 .002 | A: 4.78 .51, B: 1.78 .38, C: .51 .05 |
| MS151 | 0.45 | 0.75 | 20 | 2 Meg | 300 | 750 | A: .250 .020, B: .094 .015, C: .025 .002 | A: 6.35 .51, B: 2.39 .38, C: .64 .05 |
| MS175 | 0.45 | 0.75 | 20 | 2 K | 300 | 750 | A: .250 .020, B: .094 .015, C: .025 .002 | A: 6.35 .51, B: 2.39 .38, C: .64 .05 |
| MS176 | 0.60 | 1.2 | 45 | 5 Meg | 500 | 750 | A: .313 .020, B: .094 .015, C: .025 .002 | A: 7.95 .51, B: 2.39 .38, C: .64 .05 |
| MS210 | 0.60 | 1.8 | 45 | 3 K | 500 | 750 | A: .313 .030, B: .109 .025, C: .025 .002 | A: 7.95 .76, B: 2.77 .64, C: .64 .05 |
| MS214 | 0.60 | 1.8 | 45 | 5 Meg | 500 | 750 | A: .400 .060, B: .140 .030, C: .025 .002 | A: 10.16 1.52, B: 3.56 .76, C: .64 .05 |
| MS220 | 1.2 | 2.4 | 20 | 10 Meg | 1,000 | 800 | A: .575 .050, B: .165 .030, C: .032 .002 | A: 14.61 1.27, B: 4.19 .76, C: .81 .05 |
| MS221 | 1.8 | 2.4 | 45 | 10 Meg | 1,000 | 800 | A: .480 .060, B: .230 .030, C: .040 .002 | A: 12.19 1.52, B: 5.84 .76, C: 1.02 .05 |
| MS223 | 1.8 | 3.6 | 20 | 4 Meg | 800 | 1,000 | A: .950 .060, B: .230 .030, C: .040 .002 | A: 24.13 1.52, B: 5.84 .76, C: 1.02 .05 |
| MS244 | 2.4 | 4.8 | 45 | 15 Meg | 2,000 | 1,000 | A: .570 .060, B: .300 .030, C: .040 .002 | A: 14.48 1.52, B: 7.62 .76, C: 1.02 .05 |
| MS245 | 2.4 | 3.6 | 20 | 6 Meg | 800 | 1,000 | A: .970 .060, B: .300 .030, C: .040 .002 | A: 24.64 1.52, B: 7.62 .76, C: 1.02 .05 |
| MS260 | 3.6 | 6.0 | 45 | 15 Meg | 2,000 | 1,000 | A: .910 .060, B: .350 .040, C: .040 .002 | A: 23.11 1.52, B: 8.89 1.02, C: 1.02 .05 |
| MS281 | 4.8 | 7.5 | 45 | 8 Meg | 2,000 | 1,000 | A: 1.250 .070, B: .350 .040, C: .040 .002 | A: 31.75 1.78, B: 8.89 1.02, C: 1.02 .05 |
| MS310 | 6.0 | 9.0 | 45 | 20 Meg | 4,500 | 1,000 | A: 2.000 .080, B: .350 .040, C: .040 .002 | A: 50.80 2.03, B: 8.89 1.02, C: 1.02 .05 |
| MS313 | 7.5 | 12.5 | 50 | 30 Meg | 6,000 | 1,000 | A: 2.000 .080, B: .350 .040, C: .040 .002 | A: 50.80 2.03, B: 8.89 1.02, C: 1.02 .05 |
| MS315 | 9.0 | 15.0 | 50 | 1 Meg | 1,000 | 1,000 | A: 3.000 .090, B: .350 .040, C: .040 .002 | A: 76.20 2.29, B: 8.89 1.02, C: 1.02 .05 |
| MS322 | 13.2 | 22.0 | 100 | 1.5 Meg | 1,000 | 1,000 | A: * , B: * , C: * | A: * , B: * , C: * |
Other 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:
(Visual representation of derating curve not possible in text format. Refer to original document for graphical data.)
Note: Models with Caddock's Non-Inductive Resistance Pattern are indicated in non-shaded areas of the specification table. Shaded areas indicate models with low inductance construction.
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