Thick Film Resistors for Dense, High-Power Designs

Bourns is supporting compact, more integrated electronic designs with a new generation of smaller form factor thick film chip resistors. We continue to work closely with our customers to meet their miniaturization needs.  Taking a leading role, Bourns just introduced a new line of space-saving high power thick film resistor products that feature double and triple-rated power, providing an ultra-high power solution to help meet dense and complex design requirements.

The three new high-power rated thick film resistor model series are:  the CHP-A, CMP and CMP-A. To support today’s increasingly higher power applications, the Bourns® Model CHP-A resistor series delivers triple-rated power. A model in the CHP-A series has one of the highest rated resistor power offerings in the industry providing rated power of 3 watts at 70 °C.

For designs that need more ruggedized components that can operate reliably in certain harsh environments, Bourns® Model CMP-A and CHP-A series are AEC-Q200 compliant and sulfur-resistant as described in the applicable datasheets. These models are tested in accordance with ASTM B809-95 methods which analyze the porosity of metallic coatings exposed to humid sulfur vapor.

Both Models CMP and CMP-A feature a wide resistance range from 1 ohm to 1 megohm and high-rated power up to 1.5 watts. Bourns® Model CMP is the enhanced performance version of the Bourns® CRM resistor series. Compared to the CRM series, the CMP series has a higher power rating, higher working voltage, and higher pulse power handling capabilities. The new CMP series is also available in a smaller 0603 form factor that meets today’s highly integrated, space-constrained design requirements.

The resistance range, high-rated power and superior pulse load features of the CHP-A and CMP/CMP-A series resistors make them ideal current sensing solutions for a wide variety of applications such as consumer electronics, industrial automation, power supplies, LED lighting and communication base stations. Giving designers additional flexibility, our latest resistor families are available in four different footprints — from the small 0603 (1608 Metric) form factor to the 2512 (6431 Metric) form factor.

Our thick film chip resistors are made of a thick film resistive layer printed onto a ceramic substrate. The thick film resistive layer is a mixture of metal oxides. Surface mount chip resistors have electroplated tin (Sn) outer terminations for board soldering. The resistive element is protected by an epoxy overcoat layer.

Another advantage of our new thick film chip resistor series is that they are RoHS compliant. This makes them suitable for most types of soldering processes used throughout the world, such as automatic, wave and reflow soldering within the shelf life of two years.

The good news is that the Model CHP-A, CMP and CMP-A thick film resistor families are all available now. For more detailed product information visit the Thick Film Chip Resistors section of our website.

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