Y14730R00500B0R

The CSM3637Z is a low value current sense resistor, providing power and precision in a four terminal, surface mount configuration. Its all welded construction is made up of a Bulk Metal® resistive element with plated copper terminations.

There are many current sense resistors on the market. Until now the combination of very stable and precise resistors with extremely low TCR as much as ± 5 ppm/°C maximum, tight tolerance of ± 0.1 % and load life stability of ± 0.2 % (2000 h, + 70 °C at rated power) was not easily available.

The key performance of the new CSM3637Z is its extremely low TCR value.

These specifications are based on tests performed in accordance with methods prescribed by appropriate MIL-PRF standards (MIL-PRF-55342 and MIL-PRF-49465).

The four terminal device separates the current leads from the voltage sensing leads. This configuration eliminates the effect of the lead wire resistance from points A to B and C to D.

In addition a key feature of the CSM3637Z is its low thermal EMF design (very important for low ohmic value DC applications). The welded terminals make intimate contact with the chip thereby minimizing temperature differentials.

• Resistance range: 3 mO to 50 mO
• Temperature coefficient of resistance (TCR): ± 5 ppm/°C maximum (- 55 °C to + 125 °C, + 25 °C ref.)
• Load life stability to ± 0.2 % (70 °C, 2000 h at rated power)
• Power rating: to 3 W
• Resistance tolerance: ± 0.1 %
• Short time overload: ± 0.1 % typical
• Proprietary processing technique produces extremely low resistance values with improved stability
• All welded construction
• Solderable terminations
• Very low inductance 0.5 nH
• Excellent frequency response to 50 MHz
• Low thermal EMF < 3 µV/°C (DC offset error, significant for low values)
• Maximum current: up to 31 A
• Four terminal (Kelvin) design: allows for precise and accurate measurements
• Terminal finish: lead (Pb)-free or tin/lead alloy