AUD | USD

Current Sense Transformers

TDK Corporation offers their compact SMT current sense transformers for power electronics

Image of EPCOS SMT Current Sense TransformersTDK Corporation presents two series of EPCOS SMT current sense transformers for power electronics. The various types in the B78417A series are based on EP7 ferrite cores, have compact dimensions of just 10.6 mm x 12.2 mm x 11 mm, and are designed to measure pulse currents of up to 20 A. The maximum DC resistance on the primary winding is 1.9 mΩ. The SMT current sense transformers in the B78419A series are designed with EP10 ferrite cores. These components have dimensions of 12.8 mm x 13.6 mm x 14.4 mm and their measurement range extends up to 30 A. The DC resistance is just 0.5 mΩ. Each series is available with a variety of turn ratios: While the EP7-based transformers are available in four versions with turn ratios of between 1:50 and 1:125, the EP10 transformers offer five versions with turn ratios of between 1:50 and 1:180. The permissible operating temperature range extends from -40°C to +150°C. The transformers are suitable for measuring currents in the frequency range from 50 kHz to 250 kHz. Possible applications include switch-mode power supplies and all types of converters. The test voltage between the primary and secondary sides is 2400 VAC and the creepage distances meet the requirements for basic insulation according to IEC 60664. As the components are qualified to AEC-Q200, they can also be used in xEV applications, such as measuring the currents in DC/DC inverters.

Features and Benefits
  • Wide measuring range up to 30 A
  • Low ohmic resistance
  • Creepage distances according to IEC 60664 (basic insulation)
  • High dielectric strength for compact design
  • Qualified to AEC-Q200
  • Wide range of turn ratios
Applications
  • Switch-mode power supplies and all types of converters
  • DC/DC inverters in xEV applications
  • Current measurement in 48 V on-board power supplies

Current Sense Transformers

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
CURR SENSE XFMR 1:100 SMDB78417A2185A003CURR SENSE XFMR 1:100 SMD357 - ImmediateView Details
CURR SENSE XFMR 1:50 SMDB78417A2285A003CURR SENSE XFMR 1:50 SMD371 - ImmediateView Details
CURR SENSE XFMR 1:70 SMDB78417A2286A003CURR SENSE XFMR 1:70 SMD295 - ImmediateView Details
CURR SENSE XFMR 1:125 SMDB78417A2287A003CURR SENSE XFMR 1:125 SMD133 - ImmediateView Details
CURR SENSE XFMR 1:100 SMDB78419A2251A003CURR SENSE XFMR 1:100 SMD1219 - ImmediateView Details
CURR SENSE XFMR 1:50 SMDB78419A2288A003CURR SENSE XFMR 1:50 SMD5 - ImmediateView Details
CURR SENSE XFMR 1:70 SMDB78419A2289A003CURR SENSE XFMR 1:70 SMD79 - ImmediateView Details
CURR SENSE XFMR 1:125 SMDB78419A2290A003CURR SENSE XFMR 1:125 SMD199 - ImmediateView Details
CURR SENSE XFMR 1:180 SMDB78419A2271A003CURR SENSE XFMR 1:180 SMD6 - ImmediateView Details
Published: 2016-02-19