QFX

www.vishay.com

Vishay Electro-Films

Revision: 05-Apr-13

1

Document Number: 61031

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

Thin Film, Top-Contact Megohm Resistor

Product may not be to scale

The QFX series, tantulum nitride on quartz resistor chips

combine high resistance with low shunt capacitance. These

offer one of the best combinations of small size, frequency

response and high value available.

The QFXs are manufactured using Vishay Electro-Films (EFI)

sophisticated thin film equipment and manufacturing

technology. The QFXs are 100 % electrically tested and

visually inspected to MIL-STD-883, method 2032 class H

or K.

FEATURES

• Wire bondable

• Chip size: 0.050 inches square

• Case: 0505

• Resistance range: 500 k

 to 10 M

• Quartz substrate: < 0.1 pF shunt capacitance

• Resistor

material:

Tantalum

nitride,

self-passivating

• Material categorization: For definitions of compliance

APPLICATIONS

The QFX series resistor chips are designed for circuits

requiring high values with lower shunt capacitance for

higher frequency of operation.

TEMPERATURE COEFFICIENT OF RESISTANCE, VALUES, AND TOLERANCES

PARAMETER

VALUE

UNIT

Total Resistance Range

500K to 10M



Standard Tolerances

± 0.1, ± 0.5

%

TCR

± 50, ± 100, ± 250, ± 350

ppm/°C

STANDARD ELECTRICAL SPECIFICATIONS

PARAMETER

VALUE

UNIT

Noise, MIL-STD-202, Method 308

- 12 typ.

dB

Moisture Resistance, MIL-STD-202



Method 106

± 0.5 max.

R/R

%

Stability, 1000 h, + 125 °C, 10 mW

± 0.5 max.

R/R

%

Operating Temperature Range

- 55 to + 125

°C

Thermal Shock, MIL-STD-202,



Method 107, Test Condition F

± 0.25 max.

R/R

%

High Temperature Exposure, + 150 °C, 100 h

± 0.5 max.

R/R

%

Dielectric Voltage Breakdown

400

V

Insulation Resistance



Operating Voltage

400 max.

V

DC Power Rating at + 70 °C (Derated to zero at + 175 °C)

0.020

W

5 x Rated Power Short-Time Overload, + 25 °C, 5 s

± 0.25 max.

R/R

%

0.1 %

Tightest Standard Tolerance Available

± 250 ppm/°C

± 50 ppm/°C

± 100 ppm/°C

0.5 %

1 M

Ω

10 M

Ω

2.0 M

Ω

500 k

Ω

± 350 ppm/°C

4.2 M

Ω