The 303261 - 303266 series is based on VFR's next-generation Z1-Foil technology. The devices excel over all previous stability standards for precision resistors with an order of magnitude improvement in temperature stability, load-life stability, and moisture resistance. These benchmark levels of performance provide design engineers with the tools to build circuits not previously achievable, while reducing costs in the most critical circuits by eliminating the need for corrective circuitry.

In addition to their remarkable load-life stability of ±0.0025%, the resistors are noise-free and provide the utmost in ESD immunity, withstanding electrostatic discharges of 25 kV or more for increased reliability. The devices' solid element alloy is matched to the substrate, forming a single entity with balanced resistance versus temperature characteristics for an unusually low and predictable TCR over a wide temperature range from -55°C to +150°C.

The new adhesive that holds the foil to the flat substrate withstands high temperatures, pulsing power, moisture incursions, shock and vibration, and low-temperature exposure, while still holding securely to the foil element. Resistance patterns are photo-etched into the element to permit the trimming of resistance values to very tight tolerances as low as 0.02%.

"Even if an avionics/military/space application normally doesn't require the high precision, stability, and reliability provided by the EEE-INST-002 Bulk Metal Foil resistor, these characteristics provide a higher margin of protection against 'black swan events' at a negligible additional cost," said Yuval Hernik, senior director of application engineering for VFR.

"It isn't one single feature that makes the precision work; it's all the features working together that creates the overall stability and impacts the entire error budget."

Features:

－ Resistance range: 10 Ω to 75 kΩ (for higher and lower values, please contact us)

－ Vishay Foil resistors are not restricted to standard values; specific “as required” values can be supplied at no extra cost or delivery (e.g., 1K2345 vs. 1K)

－ Thermal stabilization time: <1 s (within 10 ppm of steady state value)

－ Electrostatic discharge (ESD): at least to 25 kV

－ Short time overload: ≤0.005%

－ Rise time: 1 ns, effectively no ringing

－ Current noise: <0.010 μVRMS/V of applied voltage

－ (<–40 dB)

－ Voltage coefficient: <0.1 ppm/V

－ Non-inductive: <0.08 μH

－ Non-hot spot design

－ Terminal finishes available: tin/lead alloy

－ Matched sets are available on request

－ Prototype quantities available in just 5 working days or sooner. For more information, please contact us.

－ For higher temperature application up to +240°C and for better performances, please contact us.

Adding “U” to the model number (example: 303261U). These units have all of the Table 2A (page 5) 100% tests performed, with no destructive qualification testing required