Special flat chip resistor
solutions from KOA
KOA's resistors are an ideal choice for designers in a wide range of demanding markets such as automotive, industrial, aerospace, medical, instrumentation and power conversion.
1
KOA is a byword in the industry for excellent quality and reliability
and the majority of KOA products are tested according to AEC-Q200.
2
Quality is of utmost importance to KOA,
resulting in the most reliable components in their class.
3
KOA Corporation is certified acc. to DIN EN ISO 9001,
IATF 16949 and ISO 14001
4
Newark stocks an extensive range of KOA products
Featured products
RN73R
High precision & high reliability thin film resistors
- With a T.C.R. down to 5ppm/K and a tolerance as low as 0.05% the RN73R -series is ideal for high-precision circuits in industrial and measuring applications.
- This series provides improved electrolytic corrosion resistance and higher stability compared to KOA’s legacy RN73 series which it replaces.
- The RN73R has an ambient temperature rating of +85°C, as well as a moisture tolerance of 0.25% at 85% RH for 1000 hours at +85°C.
RN73H
High precision & high reliability thin film resistors for tough environment
- With a T.C.R. down to 5ppm/K and a tolerance as low as 0.05% the RN73H -series is ideal for high precision circuits for automotive, aerospace and other challenging applications.
- These thin film resistors have excellent moisture resistance due to an additional inner protective layer.
- The RN73H has an ambient temperature rating of +85°C, and a moisture resistance of 0.1% at 85 % RH for 1000 hours at +85°C.
RS73
High precision & high reliability thick film resistors
- KOA’s new high precision resistors are using thick film technology and feature an excellent long term stability.
- With a T.C.R. down to ±25ppm and a tolerance as low as ±0.1%, the new RS73-series from KOA is ideal for precision designs such as high-accuracy sensing or voltage detection circuits in automotive, industrial and measuring applications, where ESD sensitivity is an issue.
- The new RS73-series also features an excellent long term stability of ±0.2% and is available in 0402, 0603, 0805 and 1206 inch.
SG73P
Endured pulse power thick film resistors
- KOA's SG73P-series has approx. 7 times pulse handling capability compared to standard flat chip resistors.
- Due to the special resistance trimming it also allows a higher continuous power rating. This means that existing designs can be ‘powered up’: An SG73P device can be dropped onto the pads of a similar sized conventional part, thus increasing the power capability without changing the PCB layout. Equally in a new design a smaller SG73 device can be used saving valuable PCB space.
WK73R
Space saving wide termination thick film resistors
- KOA’s wide terminal resistors offer several advantages compared to standard footprints. For example, the 0612 chip size allows 6 x power rating compared to standard 1206 parts.
- This saves board space and is possible due to the improved heat dissipation via the solder joints.
- The larger terminals also enhance terminal strength and the smaller distance between the terminals reduces expansion stress.
- Finally, the inner resistive pattern is designed to minimize hotspots.
HV73 & HV73V
Flat chip resistors for high voltage
- KOA's HV73-series is designed for voltages up to 3 kV (2512 size).
- The special coating and trimming insulation ensures that higher voltages can be applied at operating temperatures up to +155 °C.
- Using high voltage resistors instead of a string of standard parts means that fewer parts are used in voltage detecting circuits and less PCB space is needed.
- The HV73V-series is AEC-Q200 tested and suitable for high reliability automotive applications.
TLR
Low Ohm, high power metal plate shunt resistors
- KOA's TLR metal plate current sensing resistors are offered in the ultra-low resistance range 0.5mΩ…20mΩ and allow maximum sensing currents ranging from 5A to 100A at +110°C terminal temperature.
- Special trimming gives the device low inductance and removes any hotspots from the design, leading to a more reliable device.
- KOA recommends the sizes 0805 (2A), 1206 (2B) and 2512 (3A) for new designs.
- The TLR series also has excellent pulse resistance and high-frequency characteristics, is AEC-Q200 tested and suitable for high reliability automotive applications.
TLRZ
High current zero Ohm jumpers
- KOA's TLRZ-series metal plate zero ohm jumpers allow high currents in very small sizes (0402=10A, 0603=26A, 0805=31.6A, 1206=50A).
- These low profile jumpers are ideal for replacing thick film devices in existing designs where these parts are struggling with current capacity, or on redesigns where space is at a premium.
- All TLRZ jumpers are AEC-Q200 tested and suitable for high reliability automotive, industrial and all other high current applications, reducing PCB space, or retrofitting existing low current jumpers when needed.
UR73
Low resistance, low TCR thick film resistors
- KOA's UR73-series covers the 10mΩ - 100mΩ range with T.C.R. combinations down to 100ppm.
- The UR73 offers a cost-efficient approach for current sensing in the power range from 0.125 to 1 Watt and is available in sizes from 0402 to 2512. Standard mounting or face-down (D-version) construction types are available.
- The D-version parts use a facedown construction which enables a shorter current path to the resistance film minimising the effect of the T.C.R. of the terminals.
- These devices are designed for current detection in power supplies, motor control and industrial automation applications.
UR73V
Low resistance, low TCR thick film resistors for automotive
- KOA's UR73V-series covers the 10mΩ - 1Ω range with T.C.R. combinations down to 75ppm that has so far been dominated by metal plate resistor solutions.
- The UR73V is the AEC-Q200 automotive qualified version and offers a cost-efficient approach for current sensing.
- It is available in sizes 0805 (0.5W) and 1206 (up to 1W).
- Standard mounting or face-down (D-version) construction types are available.
- The D-version parts use a facedown construction which enables a shorter current path to the resistance film minimising the effect of the T.C.R. of the terminals.
- These devices are designed for current detection in automotive, power supplies, motor control and industrial automation applications.
