Susumu – Precision Chip Resistors with the Highest Power Rating


The latest spinoff from Susumu’s RG series, the best performing and most reliable thin film chip resistors in the market, is the PRG series with a power rating almost 5 times as high as the RG series.

Size and Power
The PRG series, long side terminal products, are currently offered in 3 sizes: 1206 size is rated at 1W, 2008 size is rated at 2W and 2512 size is rated at 3W. These power ratings are about 4 to 8 times higher than typical chip resistors of the same size. For example, most 1206 resistors are rated 0.125W or at most 0.25W. Normally, it takes 2512 size to offer 1W.

Electrical Characteristics and Reliability
Because the PRG series is an offspring of the RG series, the PRG series maintains all the thin film characteristics of the RG series such as precise absolute tolerance (±0.1% ), small temperature coefficient of resistance (25ppm/°C), low noise, and wide range of operating temperature (-55°C to +155°C). Likewise, reliability of the PRG series is just as good as the RG series. The maximum drift for most standard reliability tests such as short time overload, load life, temperature humidity bias, thermal shock, and high temperature exposure is specified as 0.05% to0.1%.

For applications that require extreme precision and reliability such as precision industrial and medical instrumentation, test and measuring instrumentation, optical and telecommunication, automotive electronics, laboratory grade scales, power supplies, and power grid infrastructure, now you have a choice among Susumu’s three highly precise and highly reliable RG series family products: the original RG series for general purpose, the URG series where ultra reliability is required, and the PRG series for applications of extreme high power requirements. The RG, URG and PRG series are all RoHS compliant and 100% lead-free.

TypeSize (in inches)Power RatingResistance ToleranceTCRResistance Range (Ω) +E24 and E56 Series R ValuePackaging
PRG321612061.0W±0.1%(B), ±0.5%(D)±25ppm/°C(P), ±50ppm/°C(Q), ±25ppm/°C(P), ±50ppm/°C(Q)47-100k, 10-100k, 2.5-100kTape and Reel T5=5000pcs
PRG502020081.5W~2.0W±0.1%(B), ±0.5%(D)±25ppm/°C(P), ±50ppm/°C(Q), ±25ppm/°C(P), ±50ppm/°C(Q)47-200k, 10-200k, 2.5-200kTape and Reel T4=4000pcs
PRG643225122.0W~3.0W±0.1%(B), ±0.5%(D)±25ppm/°C(P), ±50ppm/°C(Q), ±25ppm/°C(P), ±50ppm/°C(Q)47-250k, 10-250k, 2.5-250kTape and Reel T4=4000pcs

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