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144 Revision: 27-Aug-10
PAC.. Series
Vishay Draloric
Cemented Wirewound Precision Resistors
FEATURES
•High power dissipation in small volume
•Ideal for pulse application
•TCR ± 100 ppm/K
•Maximum permissible hot spot temperature is
275 °C
•Lead (Pb)-free
•Tolerance 1 %
•Compliant to RoHS directive 2002/95/EC
The resistor element is a resistive wire which is wound in a
single layer on a ceramic rod. Metal caps are pressed over
the ends of the rod. The ends of the resistance wire and the
leads are connected to the caps by welding. Tinned
copper-clad iron leads with poor heat conductivity are
employed permitting the use of relatively short leads to
obtain stable mounting without overheating the solder joint.
The resistor is coated with a green silicon cement which is
not resistant to aggressive fluxes. The coating is
non-inflammable, will not drip even at high overloads and
is resistant to most commonly used cleaning solvents, in
accordance with IEC 60068-2-45.
Notes
(1) PAC02 WSZ: P25 °C = 1.8 W
(2) Resistance value to be selected for ± 1 % tolerance from E24 and E96
• For Pulse Diagrams see AC..series (www.vishay.com/doc?28730)
** Please see document “Please see document “Vishay Material Category Policy”:”: www.vishay.com/doc?99902
STANDARD ELECTRICAL SPECIFICATIONS
MODEL POWER RATING
P25 °C
LIMITING
VOLTAGE
Umax.
RESISTANCE RANGE (2) TOLERANCE
PAC01 1 W 0.10 Ω to 2.2 kΩ± 1 %
PAC02 (1) 2 W 0.10 Ω to 3.6 kΩ± 1 %
PAC03 3 W 0.10 Ω to 4.7 kΩ± 1 %
PAC04 4 W 0.10 Ω to 8.2 kΩ± 1 %
PAC05 5 W 0.10 Ω to 10 kΩ± 1 %
PAC06 6 W 0.10 Ω to 12 kΩ± 1 %
P x R
P x R
P x R
P x R
P x R
P x R
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PAC.. Series
Cemented Wirewound Precision Resistors Vishay Draloric
Notes
(1) Special winding on request
(2) Other dimensions on request
(3) See “Part Number and Product Description”
(4) See “Packaging Table”
PART NUMBER AND PRODUCT DESCRIPTION
Part Number: PAC300004701FAC000
MODEL VARIANT TCR/MATERIAL VALUE TOLERANCE
CODE
PA CK AG I N G
CODE SPECIAL
PAC1 00 = PAC01
PAC2 00 = PAC02
PAC3 00 = PAC03
PAC4 00 = PAC04
PAC5 00 = PAC05
PAC6 00 = PAC06
0 = Neutral
1 = SWI =
Special winding (1)
2 = RT
3 = DK SP 20 mm
4 = DK LP 33 mm (2)
5 = DK LP 17.8 mm (2)
7 = DK LP 25.4 mm (2)
8 = DK SP 25.4 mm
9 = WSZ 6720
C = E/K 22.4 mm (2)
Z = Value overflow
(special)
0 =
Standard
(± 100 ppm/K)
3 digit value
1 digit multiplier
MULTIPLIER
7 = *10- 3
8 = *10- 2
9 = *10- 1
0 = *100
1 = *101
2 = *102
3 = *103
4 = *104
5 = *105
F = ± 1.0 % (See
Packaging
table)
The 3 digits are
used for all special
part styles.
To encode the
non standard
specifications all
special parts of one
series are listed in a
cross reference
table.
000 = Standard
Product Description: PAC03 4K7 1 % AC
PAC03 4K7 1 % AC
MODEL (3) VALUE (3) TOLERANCE CODE (3) PAC K AG I N G
DESCRIPTION (4)
PACKAGING TABLE
MODEL
AMMO LOOSE BLISTER
PIECES PACK.
CODE
PACK.
DESC. PIECES PACK.
CODE
PACK.
DESC. PIECES PACK.
CODE
PACK.
DESC.
PAC01 1000 A1 A1
PAC01 DK/EK 500 LC LC
PAC01RT 2500 AE AE
PAC02 500 AC AC
PAC02 DK/EK 500 LC LC
PAC02 WSZ 1250 BM BM
PAC03 500 AC AC
PAC03 DK/EK 500 LC LC
PAC04 500 AC AC
PAC04 DK/EK 500 LC LC
PAC05 500 AC AC
PAC05 DK/EK 250 LB LB
PAC06 500 AC AC
PAC06 DK/EK 250 LB LB
3000 4700AC FAC 01P 00
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146 Revision: 27-Aug-10
PAC.. Series
Vishay Draloric Cemented Wirewound Precision Resistors
DIMENSIONS
MODEL
DIMENSIONS in millimeters (inches)
Dmax. Lmax. dG
WEIGHT g
PER UNIT
PAC01 4.3 [0.169] 11 [0.433]
0.8 ± 0.03
[0.031 ± 0.001]
63 ± 1 [2.480 ± 0.039] 0.52
PAC02 4.8 [0.189] 13 [0.512] 63 ± 1 [2.480 ± 0.039] 0.75
PAC03 5.5 [0.217] 16.5 [0.650] 63 ± 1 [2.480 ± 0.039] 1.10
PAC04 7.5 [0.295] 18 [0.709] 73 ± 1 [2.874 ± 0.039] 1.90
PAC05 7.5 [0.295] 26 [1.024] 73 ± 1 [2.874 ± 0.039] 2.60
PAC06 7.5 [0.295] 26 [1.024] 73 ± 1 [2.874 ± 0.039] 2.60
DL
G
d
For packaging dimensions see: www.vishay.com/doc?28721
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PAC.. Series
Cemented Wirewound Precision Resistors Vishay Draloric
Note
(1) See table DIMENSIONS
BENDING FORMS
TYPE Ø d Ø Dmax. L h ± 1 P ± 1 Smax.
PAC01
0.8 (1) (1) 8
17.8
2PAC02 - PAC04 25.4
PAC05 - PAC06 33.0
TYPE Ø d Ø Dmax. Lh ± 1P
1 ± 1 P2 ± 3 Smax. Ø B c
PAC01
0.8 (1) (1) 8
19.8 17.8
2 1.0 ± 0.1 4.5 ± 1PAC02 - PAC04
22.0 20.0
27.4 25.4
PAC05 - PAC06 35.0 33.0
TYPE Ø d Ø Dmax. Lh ± 1P
1 ± 1 P2 ± 3 Smax. Ø B c
PAC01 - PAC02
0.8 (1) (1) 8
17.8 17.8
2 1.0 ± 0.1 4.5 ± 1PAC02 - PAC04 25.4 25.4
PAC05 - PAC06 33.0 33.0
P
h
L
Ø d
Ø D
S
KINK TYPE S = EK
Ø D
DOUBLE KINK SP = DK SP
S
Ø d
P1
h
P2
c
Ø B
L
Ø D
DOUBLE KINK LP = DK LP
S
Ø d
P1
h
P2
c
Ø B
L
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PAC.. Series
Vishay Draloric Cemented Wirewound Precision Resistors
Notes
(1) See table DIMENSIONS
(2) Test over 10 holes - 9 intervals P0 12.7 x 9 = 114.3 ± 0.5
(3) Parallelism, < 0.5 mm
(4) Thickness of carrier tape: 0.55 mm ± 0.1
BENDING FORMS
TYPE Ø d Ø Dmax. ALFHEab l
PAC02 WSZ 0.8 (1) 17 ± 0.5 11 - 12 4.8 ± 0.5 3.6 ± 0.5 5.0 ± 0.5 2.5 5.5 14.5
TYPE PAC01
Lead Ø Ø d 0.8
Diameter Ø D (1)
Length L(1)
Pitch of components P 12.7 ± 1.0
Pitch of spocket holes (2) P0 12.7 ± 0.3
Distance between hole center and resistor center P1 3.85 ± 0.7
Distance between hole center and lead center P2 6.35 ± 1.0
Lead spacing F 5.0 + 0.6, - 0.1
Angle of insertion Δh1 2 max.
Width of carrier tape W 18.0 ± 0.5
Width of adhesive tape W0 12.0 ± 0.5
Position of holes W1 9.0 ± 0.5
Position of adhesive tape W2 0.5 max.
Body to hole center H 19.5 ± 1.0
Lead crimp to hole center (3) H0 16.0 ± 0.5
Hole Ø D0 4.0 ± 0.2
Thickness of tape (4) t 0.9 max.
Height for cutting L1 11 max.
Height for insertion H1 32 max.
WSZ
Ø D
A
L
E
Ø d
F
H
I
b
a
Solder pad dimensions
RADIAL TAPED = RT
1 max.
Δh1
t
Direction of Unreeling
P1F
P0D0
P2P
H1
L1
HH0
W0
W2
W1
W
d
LØ D
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PAC.. Series
Cemented Wirewound Precision Resistors Vishay Draloric
DERATING
PERFORMANCE
TEST PERMISSIBLE CHANGE
Climatic category (LCT/UCT/Days) 55/200/56
Climatic Sequence
IEC 60115-1 4.23 ΔR = ± (0.5 % R + 0.05 Ω)
Damp Heat, Steady State, IEC 60115-1, 4.24
(40 ± 2) °C, 56 days, (93 ± 3) % RH ΔR = ± (1.0 % R + 0.05 Ω)
Endurance at room temperature (116 % P70), 1000 h,
IEC 60115-1, 4.25.2 ΔR = ± (0.5 % R + 0.05 Ω)
Storage, UCT, IEC 60115-1, 4.25.3
1000 h, 200 °C, no load ΔR = ± (1.0 % R + 0.05 Ω)
Resistance to Soldering Heat, IEC 60115-1, 4.18
(260 ± 5) °C, (10 ± 1) s ΔR = ± (0.2 % R + 0.05 Ω)
Robustness of Termination, IEC 60115-1, 4.16
10N ΔR = ± (0.1 % R + 0.05 Ω)
Short Time Overload, IEC 60115-1, 4.13
10 x Rated Power for 5 s ΔR = ± (0.2 % R + 0.05 Ω)
0
20
40
60
80
100
50 100 150 200 250 300
AMBIENT TEMPERATURE IN °C
025
RATED POWER IN %
Maximum dissipation (Pmax.) as a function
of the ambient temperature (Tamb)
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150 Revision: 27-Aug-10
PAC.. Series
Vishay Draloric Cemented Wirewound Precision Resistors
HISTORICAL 12NC INFORMATION
•The resistors had a 12-digit ordering code staring with
2306 327
•The subsequent first digit indicated the resistor type and
packaging.
•The remaining 4 digits indicated the resistance value:
- The first 3 digits indicated the resistance value.
- The last digit indicated the resistance decade in
accordance with Resistance Decade table.
Resistance Decade
Ordering Example
The ordering code for an PAC02, resistor value 47 Ω with
± 1 % tolerance, supplied in ammopack of 500 units was:
2306 327 04709.
Note
(1) Radial parts with tin plated copper leads
RESISTANCE DECADE LAST DIGIT
0.10 to 0.976 Ω7
1to9.76Ω8
10 to 97.6 Ω9
100 to 976 Ω1
1to9.76kΩ2
10 to 12 kΩ3
HISTORICAL 12NC - Resistor type and packaging
TYPE
2306 327 .....
BANDOLIER IN AMMOPACK
RADIAL STRAIGHT LEADS
2500 units 500 units 1000 units
PAC0 1 R T (1) - 2306 327 5....
PAC02 - 2306 327 0.... -
PAC03 - 2306 327 1.... -
PAC04 - 2306 327 2.... -
PAC05 - 2306 327 3.... -
PAC06 - 2306 327 4.... -
Document Number: 91000 www.vishay.com
Revision: 11-Mar-11 1
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