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VFCP Series (0805, 1206, 1506, 2010, 2512) (Z-Foil)

Document No.: 63106

Revision: 04-Nov-2013

relevant to designers of circuits used in alternative

energy and industrial applications, where environmental

pollution is a constant concern. Analog circuitry in

these applications almost always operates under severe

environmental, thermal, and mechanical conditions,

and must withstand frequent and extended service by

professionals and novices alike. The picture is further

complicated by tough regulatory restrictions and high

consumer expectations. VFR received a steady stream

of customer inquiries, which led to more focus on anti-

sulfurated resistor research and development. As a result

we have qualified our surface-mount foil chip resistors

as “antisulfurated resistors.” These resistors are capable

of exposure to sulfurous environments without damage.

Beyond alternative energy, applications include industrial

control systems, sensors, RTDs, electric instrumentation,

weather and communication base stations. These

resistors are also suited for electronic appliances used in

high concentrations of sulfur.

POWER COEFFICIENT OF RESISTANCE

(PCR)

The TCR of a resistor for a given temperature range is

established by measuring the resistance at two different

ambient temperatures: at room temperature and in a

cooling chamber or oven. The ratio of relative resistance

change and temperature difference gives the slope of

DR/R = f (T) curve. This slope is usually expressed in

parts per million per degree Centigrade (ppm/°C). In

these conditions, a uniform temperature is achieved

in the measured resistance. In practice, however, the

temperature rise of the resistor is also partially due to

self-heating as a result of the power it is dissipating. As

stipulated by the Joule effect, when current flows through

a resistance, there will be an associated generation of

of a heat flow and of a temperature gradient. Therefore,

the TCR alone does not provide the actual resistance

change for precision resistor. Hence, another metric is

introduced to incorporate this inherent characteristic—the

Power Coefficient of Resistance (PCR). PCR is expressed

in parts per million per Watt or in ppm at rated power. In

the case of Z-based Bulk Metal® Foil, the PCR is 5 ppm

typical at rated power or 4 ppm per Watt typical for power

resistors.

TABLE 6—GLOBAL PART NUMBER INFORMATION(1)

NEW GLOBAL PART NUMBER: Y163010K0000T9W (preferred part number format)

S

C

I

T

S

I

R

E

T

C

A

R

A

H

C

E

U

L

A

V

N

O

I

S

I

C

E

R

P

S

E

T

O

N

E

D

R

Y

= Ω

K = kΩ

0 = tin/lead

9 = lead (Pb)-free

1 to 999 = custom

G

N

I

G

A

K

C

A

P

E

C

N

A

R

E

L

O

T

E

C

N

A

T

S

I

S

E

R

E

D

O

C

T

C

U

D

O

R

P

1629 = VFCP0805

1630 = VFCP1206

1631 = VFCP1506

1632 = VFCP2010

1633 = VFCP2512

T = ±0.01%

Q = ±0.02%

A = ±0.05%

B = ±0.10%

C = ±0.25%

D = ±0.50%

F = ±1.00%

R = tape and reel

W = waffle pack

FOR EXAMPLE: ABOVE GLOBAL ORDER Y1630 10K0000 T 9 W:

TYPE: VFCP1206

VALUE: 10.0 kΩ

ABSOLUTE TOLERANCE: ±0.01%

TERMINATION: lead (Pb)-free

PACKAGING: waffle pack

HISTORICAL PART NUMBER:VFCP1206 10K000 TCR0.2TSW(will continue to be used)

VFCP120610K000TCR0.2T

SW

MODELOHMIC VALUETCR

RESISTANCE

TOLERANCE

TERMINATIONPACKAGING

VFCP0805

VFCP1206

VFCP1506

VFCP2010

VFCP2512

10.0 kΩ

Characteristic

T = ±0.01%

Q = ±0.02%

A = ±0.05%

B = ±0.10%

C = ±0.25%

D = ±0.50%

F = ±1.00%

S = lead (Pb)-free

B = tin/lead

T = tape and reel

W = waffle pack

6301

K0

0

0

Y1

T9

0

W

0

Note

(1) For non-standard requests, please contact Application Engineering