TT Electronics Metal Alloy Resistors are AEC-Q200 Qualified


Reading time ( words)

TT Electronics has announced the LRMAP5930 series of low resistance, metal alloy current sense power resistors. With values down to 200μΩ and a corresponding power rating on standard FR4 PCB of up to 10W, the maximum measurable current is over 200A, and hence in most cases restricted only by the capacity of the PCB tracks. A 50% higher power rating of 15W can be achieved for assemblies mounted on a thermal substrate such as direct bonded ceramic (DBC) or insulated metal substrate (IMS), making these resistors ideal for hybrid modules.

Aimed at designers of power supplies and motor drives in the industrial, automotive and medical industries, TT Electronics’ LRMAP5930 high power shunt resistors are ideal in the specific areas of regulating current flow, detecting stalled motors and particularly, measuring power consumption. The growth of electrical drives and actuators in industrial and automotive applications has witnessed a parallel growth in the need to monitor and minimise energy usage. The LRMAP5930 is AEC-Q200 qualified for the automotive market while other applications include power supplies, battery monitoring and process control.

LRMAP5930 resistance values range from 200μΩ to 2mΩ ​​​​​​​ and the resistors feature a high surge energy capability of up to 33J.  Robust, they are formed from a continuous band of E‑beam welded precision resistive strip, and various alloys are used based on the resistance value.  The metal element shunt parts withstand all normal industrial solvents suitable for cleaning printed circuits and for ease of identification are marked ‘5930’; alloy type, ohmic value and tolerance.

The surface mount shunt resistors’ low thermal impedance minimises the temperature rise and enhances the reliability of the assembly, while their high surge tolerance gives reliable product performance under inrush and momentary short circuit conditions. Their good long term stability of value, low TCR (temperature coefficient of resistance) and low thermal EMF collectively mean that only a small part of the designer’s error budget is consumed, enabling more design freedom elsewhere in the circuit.

For circuit designers who need to guarantee stable and accurate sensing of AC and DC currents up to 200A in SMT assemblies, TT Electronics’ LRMAP5930 high power shunt resistors match or surpass the power ratings of key competitors’ parts in most ohmic values. It is important that specifiers and designers make power rating comparisons taking mounting conditions into account. TT Electronics clearly defines these on the resistors’ datasheet that presents dual ratings based on standard FR4 PCB and thermal substrate mounting types.

Share

Print


Suggested Items

Foundations of the Future: Get More Engaged in 2020

01/22/2020 | Charlene Gunter du Plessis, IPC Education Foundation
Since the inception of the IPC Education Foundation in January 2019, the mission remains to create connections between electronics manufacturers and supply chain companies, academia and the emerging workforce. In this debut column, Charlene Gunter du Plessis describes plans for engaging in 2020, including scholarships and more, and the IPC APEX EXPO 2020 STEM Student Outreach event.

CyberOptics Sensors: So Good That Their Rivals Use Them

12/20/2019 | Real Time with...productronica
Editor Nolan Johnson and Subodh discuss CyberOptics’ latest precision 3D systems, such as the SQ3000, which offers AOI, SPI and CMM functionalities. The inline CMM system includes top-of-the-line software for metrology grade measurements of critical points. Subodh points out that some of his competitors even utilize CyberOptics sensors in their equipment.

Global Political Turmoil Creating Uncertainties for the Industry

11/20/2019 | Chris Mitchell, IPC Vice President of Global Government Relations
From where I sit, representing the interests of electronics manufacturers and related companies around the world, I regret to say that the future of our industry—while bright overall—is fraught with uncertainties, from trade policy disputes to government leadership turnovers and economic and social megatrends. IPC is working with all governments and parties to overcome these uncertainties, but there is a lot to tackle.



Copyright © 2020 I-Connect007. All rights reserved.