VRM

Resistor with TCR of ± 4 ppm/°C and Tolerance to ± 0.01 %

www.vishay.com

For any questions, contact: foil@vishay.com

Document Number: 63010

2

Revision: 12-Jul-07

Note

* For non-standard requests, please contact Application Engineering.

FIGURE 3 - TEMPERATURE COEFFICIENT

+ 400

+ 200

0

- 200

- 400

0

+ 25

- 140

Temperature, °C

+ 140

+ 100

- 100

ΔR

R

(ppm)

+ 60

+ 4 ppm/°C

- 4 ppm/°C

FIGURE 4 - TRIMMING TO VALUES

(Conceptual Illustration)

Mutual Inductance

Reduction due

to Change in

Current Direction

Current Path

Before Trimming

Note: Foil shown in black, etched spaces in white

Interloop Capacitance

Reduction in Series

Trimming Process

Removes this Material

from Shorting Strip Area

Changing Current Path

and Increasing

Resistance

Current Path

After Trimming

TABLE 2 - GLOBAL PART NUMBER INFORMATION

NEW GLOBAL PART NUMBER: Y007345K4540Q9L (preferred part number format)

DENOTES PRECISION

VALUE

AER*

YR =

Ω

K = k

Ω

0 = Standard

9 = Lead (Pb)-free

1 - 999 = Custom

PRODUCT CODE

RESISTANCE TOLERANCE

PACKAGING

0073 = VRM

T = ± 0.01 %

Q = ± 0.02 %

A = ± 0.05 %

B = ± 0.1 %

C = ± 0.25 %

D = ± 0.5 %

F = ± 1.0 %

L = Bulk Pack

FOR EXAMPLE: ABOVE GLOBAL ORDER Y0073 45K4540 Q 9 L:

TYPE: VRM

VALUE: 45.454 k

Ω

ABSOLUTE TOLERANCE: ± 0.02 %

TERMINATION: Lead (Pb)-free

PACKAGING: Bulk Pack

HISTORICAL PART NUMBER EXAMPLE: VRMT 45K454 Q B (will continue to be used)

VRM

T

45K454

Q

B

MODEL

TERMINATION

OHMIC VALUE

RESISTANCE

TOLERANCE

PACKAGING

VRM

T = Lead (Pb)-free

None = Tin/Lead alloy

45.454 k

Ω

T = ± 0.01 %

Q = ± 0.02 %

A = ± 0.05 %

B = ± 0.1 %

C = ± 0.25 %

D = ± 0.5 %

F = ± 1.0 %

B = Bulk Pack

07

3

4

K

4

5

5

Y0

0Q

4

9

L