Vishay rolls Bulk Metal Z-Foil power current sensing resistors

Vishay Precision Group, Inc. has introduced the VPR5Z and VPR7Z ultra-high precision Bulk Metal Foil power current sensing resistors with very low TCR of ±0.05 ppm/°C from 0°C to +60°C and ±0.2 ppm/°C from -55°C to +125°C, +25°C ref., and resistance tolerance to ±0.01.

For high-power applications, the VPR5Z offers a power rating of 5 W at +25ºC, while the VPR7Z offers a power rating of 7 W and load life stability of ±0.01% at 70°C for 2,000 hours at rated power.

Key features:
• Temperature coefficient of resistance (TCR):
± 0.05 ppm/°C (0 °C to 60 °C)
± 0.2 ppm/°C (- 55 °C to + 125 °C, + 25 °C ref.)
• Tolerance: ± 0.01 %
• Resistance range: 5 Ω to 100 KΩ
• Vishay Foil Resistors are not restricted to standard values
• Load life stability: ± 0.01 % (100 ppm) at 70 °C, 2000 h at rated power
• Electrostatic discharge (ESD) up to 25 000 V
• Non-inductive, non-capacitive design
• Rise time: 1 ns effectively no ringing
• Current noise: 0.010 μVRMS/V of applied voltage (< - 40 dB)
• Thermal stabilization time < 1 s (nominal value achieved within 10 ppm of steady state value)
• Thermal EMF: 0.05 μV/°C typical
• Voltage coefficient: < 0.1 ppm/V
• Non-inductive: < 0.08 μH
• Pattern design minimizing hot spots
• Terminal finish available: lead (Pb)-free or tin/lead alloy

End products include:
. Battery chargers,
. Current regulators,
. DC-to-DC converters,
. Diagnostic equipment,
. Electronic scales,
. Motor controls,
. Motor drivers,
. Over current protection,
. Pressure sensors,
. PWM input circuits,
. Remote monitoring,
. Satellite receivers,
. Voltage regulators in military/aerospace
. Surveillance applications

Availability:
Samples and production quantities of the new current sensing resistors are available now, with lead times of five days for samples, and eight weeks for standard orders.

To access the datasheet, click here.