Product Introduction Videos

This presentation will introduce Susumu’s new high power resistors, the HRG series with the conventional short side wraparound terminal, a sibling of the high power PRG which has the long side terminal. Both the HRG and PRG series were derived from the RG series but have 4 times the power rating of the original RG series.

Susumu has been introducing innovative thin film resistors and networks to all segments of the electronics industry since 1964. Among them, the RG series, introduced in 2003, was the real game changer. It rewrote the conventional beliefs in terms of tolerance, TCR, and long term reliability for thin film resisters. In this presentation, we will present another RG offspring, the HRG series.

One of the many unique RG series family products which was introduced in 2014 was the PRG series with high power handling capabilities. However, the unconventional long side terminal might not meet some of our customers’ requirements. Therefore, we are also introducing another high power offspring of the RG series, the HRG series, which has the conventional short side wraparound terminal.

The HRG series has the same precision, stability and reliability characteristics of the RG series and yet has four times the power handling capability of the same size RG series. Proprietary resistor design and the elongated bottom side terminal improve heat dissipation and allow the HRG series to handle higher power than the RG series.

As shown here, in size 3216 (1206 in inch size), the HRG series has the same power rating as the PRG series (long side terminal) which itself has four times the power rating of the original RG series.

This displays electrical specifications for the HRG series. Absolute tolerance of resistance is +/-0.1% and +/-0.5%; TCR is offered in +/-25ppm/C and +/-50ppm/C. These precision resistor characteristics are the same as those of the RG series.

Operating temperature, from -55oC to 150oC, and the derating characteristics are exactly the same as the RG series.

Reliability specifications are also the same as the RG series; maximum drift is specified from +/-0.1% to 0.5% depending on the reliability test.

It is our standard procedure to assign reliability specifications conservatively. The typical drift is much better than the specifications shown in this graph. After 2000 hours of load life testing with rated power, the typical drift is less than +/-0.02%, about 1/5 of the specification of +/-0.1%.

In temperature humidity bias, commonly referred to as 85/85, the drift after 2000 hours is almost negligible when compared to the specification of +/-0.1%.

After 1000 cycles of thermal shock between -55oC and 125oC, again, the drift is negligible when compared to the specification of +/-0.1%.

High temperature exposure at 155oC for 2000 hours did not demonstrate any change of resistance value either although the specification is set at +/- 0.1%. As shown in several examples in this presentation, it is clear that the HRG series inherited the excellent reliability characteristics of the RG series.

The HRG series, like its sibling the PRG series, can be used in any application that requires precision, reliability and a very high power rating. A few examples are sensor applications and automotive electronics applications as illustrated here.

Susumu’s new high power HRG series boasts a four times higher power rating than the RG series and yet maintains all the precision and reliability specifications of the RG series. The HRG series, together with its long side terminal sibling the PRG series, is the answer to any application requiring high power along with precision and reliability.