Product Overview
The Caddock Type SR Precision Current Sense Resistors are engineered for accurate current monitoring and control applications. Featuring a non-inductive design and a compact footprint, these resistors utilize Caddock's Micronox resistance films. They are equipped with Kelvin terminals (four-wire) for precise resistance measurements, offering values from 0.005 to 1.00. Ideal for minimizing circuit board space, these resistors provide reliable performance in demanding environments.
Product Attributes
- Brand: Caddock Electronics, Inc.
- Product Line: Type SR Precision Current Sense Resistors
- Resistance Film: Micronox
- Design: Non-inductive
- Terminal Type: Kelvin (Four Wire)
- Encapsulation: Polymer over resistance element
- Origin: USA (implied by contact address)
Technical Specifications
| Model | Resistance Min. () | Resistance Max. () | Standard Resistance Values | Power Rating at 70C* (Watts) | Voltage Rating (V) | Resistance Tolerance | Temperature Coefficient (ppm/C) | Load Life (R) | Thermal Shock (R) | Moisture Resistance (R) | Operating Temperature (C) | Dimensions (inches) | Dimensions (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SR10 | 0.005 | 1.00 | 0.005, 0.008, 0.010, 0.012, 0.015, 0.020, 0.025, 0.030, 0.033, 0.040, 0.050, 0.075, 0.10, 0.15, 0.20, 0.25, 0.30, 0.40, 0.50, 0.75, 1.00 | 1.0 | V = sqrt(PxR) | 1% | 0.005 to 0.007: 0 to +300 0.008 to 0.024: 0 to +200 0.025 to 0.080: 0 to +150 0.081 to 1.00: -50 to +100 | (0.2% + 0.00001 ) max. | (0.2% + 0.00001 ) max. | (0.2% + 0.00001 ) max. | -40C to +150C | .565 .020 (Body) .125 .020 (Terminal Spacing) | 14.35 .51 (Body) 3.18 .51 (Terminal Spacing) |
| SR20 | 0.008 | 1.00 | 0.008, 0.010, 0.012, 0.015, 0.020, 0.025, 0.030, 0.033, 0.040, 0.050, 0.075, 0.10, 0.15, 0.20, 0.25, 0.30, 0.40, 0.50, 0.75, 1.00 | 2.0 | V = sqrt(PxR) | 1% | 0.005 to 0.007: 0 to +300 0.008 to 0.024: 0 to +200 0.025 to 0.080: 0 to +150 0.081 to 1.00: -50 to +100 | (0.2% + 0.00001 ) max. | (0.2% + 0.00001 ) max. | (0.2% + 0.00001 ) max. | -40C to +150C | .365 .020 (Body) .125 .020 (Terminal Spacing) | 9.27 .51 (Body) 3.18 .51 (Terminal Spacing) |
*Power rating is based upon natural convection of free-air up to +70C. Above +70C, the power is derated based on the maximum ambient temperature of the free-air.
Measurement note: Resistance measurement shall be made using Kelvin connections (four wire) with appropriate current and sense connections to the device terminals.
Circuit Board Layout Notes: Traces connecting to current terminals must be sized appropriately for the current flowing through the trace. For example; 0.005 operated at 2.0 Watts would have 20 amps flowing through the circuit board traces into the current terminals.
Custom resistance values can be manufactured for high quantity applications. Please contact Caddock Applications Engineering.
2411191721_Caddock-SR10-0-20-1-_C3203716.pdf
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