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 support high resistance values. Constructed with Caddock's proprietary Micronox resistance films fired onto a ceramic core, they deliver 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, leading to faster settling times and minimum distortion in high-frequency circuits. These resistors are manufactured under intensive controls, including power conditioning, overvoltage conditioning, and maximum temperature conditioning, and are included in the Caddock Reliability Testing Program.
Product Attributes
- Brand: Caddock Electronics, Inc.
- Resistance Film: Micronox complex metal oxide resistance films
- Core Material: High strength solid ceramic core
- 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
- Manufacturing Control: Approved for conformance to Mil-I-45208 requirements
- Reliability Verification: Included in Caddock Reliability Testing Program (Extended Life, Shock, Vibration, Humidity)
Technical Specifications
| Model No. | Power Rating (Watts) at +125C | Power Rating (Watts) at +25C | Resistance Min. () | Resistance Max. () | Max. Voltage (V) | Dielectric Strength (V) | Dimensions (inches) A | Dimensions (inches) B | Dimensions (inches) C |
|---|---|---|---|---|---|---|---|---|---|
| MS126 | 0.25 | 0.50 | 20 | 1 Meg | 200 | 500 | .070 .015 (1.78 .38) | .188 .020 (4.78 .51) | 1.500 .125 (38.10 3.18) |
| MS150 | 0.30 | 0.45 | 20 | 2 K | 300 | 500 | .070 .015 (1.78 .38) | .188 .020 (4.78 .51) | 1.500 .125 (38.10 3.18) |
| MS151 | 0.45 | 0.60 | 20 | 2 Meg | 300 | 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 | 500 | 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 | 500 | 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 | 500 | 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 | 500 | 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 | 800 | .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 | 800 | .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 | 800 | 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 | 1,000 | .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 | 800 | 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 | 1,000 | .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 | 1,000 | .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 | 1,000 | .350 .040 (8.89 1.02) | 2.000 .080 (50.80 2.03) | 1.500 .125 (38.10 3.18) |
| MS313 | 12.5 | 12.5 | 50 | 30 Meg | 6,000 | 1,000 | .350 .040 (8.89 1.02) | 2.000 .080 (50.80 2.03) | 1.500 .125 (38.10 3.18) |
| MS315 | 15.0 | 15.0 | 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) |
General Specifications:
| Specification | Value |
|---|---|
| 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 |
Derating Curve:
The derating curve illustrates power and voltage ratings based on ambient temperature. Curve A applies to all MS models except MS126, MS151, MS176. Curve B applies to MS126, MS151, MS176.
Ordering Information Example: MS220 -100K - 1% (Model Number - Resistor Value - Tolerance)
Note: Models with low inductance construction are indicated in shaded areas in the technical specification table. Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
2411041705_Caddock-MS220-100K-1-_C20484632.pdf
Please Use Our Online Inquiry Contact Form Below If You Have Any Questions, Our Team Will Get Back To You As Soon As Possible
