Passives

SMD shunt resistors range from 0.2 to 3mΩ & 0.5 to 4mΩ

24th November 2014
Siobhan O'Gorman

Designed as an alternative to the MSR through-hole style, the CRS family of SMD shunt resistors has been released by ARCOL Resistors. The family consists of two members, both of which offer the advantage of lower ohmic values. The CRS1575 SMD shunt resistor ranges from 0.2 to 3mΩ, while the CRS1050 SMD shunt resistor ranges from 0.5 to 4mΩ.

The CRS SMD shunt resistors feature a very low inductance value of less than 3nH, ensuring an unrestricted flow of current. This is especially important in high frequency applications.

State-of-the art electron beam welding is used in the construction of the resistors to connect to resistive element to the heavy-duty copper connectors. Two resistive elements are offered: Manganin or NiCr. The Manganin option provides lower ohmic values.

The electron beam welding manufacture process ensures that the SMD shunt resistors have long-term stability, with a load life of ±1%, rated at 90 minutes ON and 30 minutes OFF over 2,000 hours. The resistors are very tolerant of overload scenarios, withstanding an overload of five times rated power for 5 seconds.

The CRS resistors’ power rating ranges from 2.5 to 7.0W. The resistors are suitable for reflow soldering or welding on copper and the resistance to solder heating is ±0.2% 350°C for 30 seconds or 250°C for 10 minutes. The in-service operating temperature range is a wide band of -55 to +170°C.

The ARCOL CRS SMD shunt resistors are suitable for applications such as solar inverters, frequency converters, current sensors for hybrid power sources, PLC control boards, power systems and motor control systems.

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