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Current Sense 14A Series

Current Sense 14A Series

Product catalog summary

Overview: The 14A Series Alumina Body Current Sense Resistors are designed for high power density applications, featuring a ceramic body that provides superior performance compared to silicone-based epoxy compounds. These resistors are available in nine resistance values, ranging from 0.004 to 0.051 ohms, and are ideal for current sensing applications.

Specifications:

Material: Ceramic cased body with solder-plated copper terminals or copper clad steel, depending on the ohmic value.
Electrical: Maximum voltage is calculated as √(PxR) RMS. Power rating is 4W at 70°C, with a linear derating to 0W at 250°C. Dielectric withstanding voltage is 1000 VRMS for 3 and 5 watt, and 500 VRMS for 2 watt. Insulation resistance is not less than 1000MΩ.
Temperature Range: -55°C to 275°C.
Tolerance: ±1% standard, with other tolerances available.
Thermal EMF: Less than ±2µV/°C.
TCR: Varies from +150 to +1100ppm/°C, increasing as resistance value decreases from 51 to 4 milliohms.

Performance Characteristics:

Endurance: Less than 5% change in resistance after 1000 hours at rated power.
Terminal Strength: Pull strength of 50N for 10 seconds as per IEC115-1, Clause 4.16 Test Ua1.
Solderability: 95% coverage as per MIL STD 202F, Test 208.
Resistance to Solder Heat: Less than 0.5% change after exposure to -260°C for 10 seconds.
Long Term Damp Heat: Less than 5% change in resistance after 56 days at 90-95% RH and 40°C.
Climatic Sequence: As per IEC 115-1, Clause 4.23, with less than 5% change in resistance.
Overload: Can withstand 5 times the rated wattage for 5 seconds.

Features:

Ideal for current sensing applications.
1% tolerance standard.
Fixed resistance measuring point.
Low inductance.
RoHS compliant.

Ordering Information: The part number format is 14AFRxxxE, where 'xxx' represents the ohm value (e.g., R050 for 0.05Ω). The series is identified by '14A', with 'F' indicating a 1% tolerance and 'A' denoting an alumina molded body.

Catalog excerpts

14AFR Current Sense resistors feature a high temperature ceramic body which affords the user higher power densities than similar products which utilize silicone based epoxy molding compounds. The internal construction involves a straight, low inductance, 3-piece welded metal element at 1% tolerance. This series is stocked in 9 popular resistance values for easy accessibility.   Features • Ideal for current sensing applications • 1% Tolerance standard • Fixed resistance measuring point • Low inductance • RoHS compliant Material Terminals: Solder-plated copper terminals or copper clad steel depending on ohmic value. Encapsulation: Ceramic cased body Derating: Linearly from 4W@70°C to 0W@250°C Electrical Max.Voltage: √(PxR) RMS Climatic Category: 55/200/56 TCR: Varies from +150 to +1100ppm/°C based on resistance value. TCR increases as resistance value reduces from 51 to 4milliohms. TCR is tested as per IEC Specification 115-1 Clause 4.8.4.2 Tolerance: ±1% standard. Others available. Power rating: 4W@70°C Dielectric withstanding voltage: 1000 VRMS for 3 and 5 watt; 500 VRMS for 2 watt. Insulation resistance: Not less than 1000MΩ. Thermal EMF: Less than ±2µV/°C. Temperature range: -55°C to 275°C. Performance Characteristics Test Endurance at Rated Power Terminal Strength Solderability Resistance to Solder Heat Long Term Damp Heat Climatic Sequence Overload Pull Strength of 50N for 10sec, IEC115-1, Clause 4.16 Test Ua1 95% Coverage as per MIL STD 202F, Test 208 -260°C for 10sec as per IEC115-1, Clause 4.18 Dimensions (in. / mm) Series Wattage Ohms Length Diam. “M” Lead 14A 4 0.004-0.051 0.709 / 18 0.252 / 6.40 1.575 / 40 0.031/0.80 A = Alumina Molded Body RoHS Compliant Tolerance Ohm Value F = 1% Example: R050= 0.05Ω Check product availability at www.ohmite.com -90-95% RH @40°C for 56 Days, IEC115-1, Clause 4.24 As per IEC 115-1, Clause 4.23 5 times rated wattage for 5 seconds Alumina Body Current Sense

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