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172
P Series Heatsinks
Forged Pin Fin heatsink for TO-220, TO-247 and TO-264 devices
Surface
Heatsink Area Weight Length Rθc-a*
Part Number Configuration (in2 /mm2) (oz./g) (in /mm) (°C/W)
PA-T2X-38E Single, 1 clip 13.4 / 8,675 0.7 / 20 1.18 / 30 7.46
PV-T2X-38E Single, 1 clip 13.4 / 8,675 0.7 / 20 1.18 / 30 8.07
PA-T21-38E Dual, 1 clip 23 / 14,823 1.3 / 39 1.18 / 30 3.13
PV-T21-38E Dual, 1 clip 23 / 14,823 1.3 / 39 1.18 / 30 3.89
PA-T22-38E Dual, 2 clip 23 / 14,823 1.3 / 39 1.18 / 30 3.13
PV-T22-38E Dual, 2 clip 23 / 14,823 1.3 / 39 1.18 / 30 3.89
*--Thermal Resistance is in open space @14 W power dissipation (28 watts for T21-T22 dual)
CHARACTERISTICS
SERIES SPECIFICATIONS
Heat sink AL1070
Spring clip Music Wire, Per ASTM A228 with bright nickel
plating
Solder feet Brass with pure tin or nickel. RoHS compliant
Interface
thermal
resistance
For improvement, use thermal joint compound,
0.005 Grafoil (TGon 800 by Laird), or phase
change material (Hi-Flow by Bergquist)
Insulator Sil-Pad 900-S, K6 800-S and K10 by Bergquist
Heat Dissipated (watts)
10 120 6 8 16
Average Case Temp. Rise
above Ambient (°C)
Heat Dissipated (watts)
20 240 12 16 28
60
40
20
0
80
120
100
60
40
20
0
80
120
100
Average Case Temp. Rise
above Ambient (°C)
Single: T2X Double: T21-T22
Thermal Performance
Ohmite introduces the P series forged pin-fin heatsink (Pat.
Pending). The P series heat sinks offer an all-in-one solution combin-
ing a compact design with a universal cam clip system for TO-220,
TO-247, TO-264 package devices. This powerful forged pin heatsink
is designed to be thru-hole soldered to the PCB
board. The forged pin design allows forced con-
vection cooling in multiple directions.
The pin fin design allows for a larger surface
area creating minimum thermal flow impedance.
The P series is the ideal type of heat sink for
high power and small size (1U or 2U) electronic
packaging with natural and forced convection
cooling.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 173
P Series Heatsinks
Forged Pin Fin heatsink for TO-220, TO-247 and TO-264 devices
DIMENSIONS
ORDERING INFORMATION
rev 2/19-3
1.50"
(38.1mm)
1.18"
(30.0mm)
0.69"
(17.5mm)
0.12"
(3.0mm)
ø0.105" pth
(2.67mm)
1.40"
(35.6mm)
1.52"
(38.6mm)
2.17"
(55.1mm)
0.65
(16.5mm)
1.62"
(41.1mm)
1.11 "
(28.2mm)
Single:
1.18"
(30.0mm)
Dual:
2.17"
(55.1mm)
0.69"
(17.5mm)
Single:
0.45" REF
(11.4mm)
Dual:
0.55" REF
(14.0mm)
0.10" REF
(2.5mm)
Single:
0.71"
(18.0mm)
Dual:
1.62"
(41.1mm)
Single:
0.122"
(3.1mm)
Dual:
0.125"
(3.2mm)
Land
Pattern
Dual: T21 and T22
Single: T2X
Note: For dual
heat sink, Device
holes spaced
1.11" [28.2mm]
and 0.555"
[14.1mm] equally
from center line
PA-T2X-38E
Series
P
Height
(mm)
Finish
A = anodized
V = degreased
Package
TO- devices
Package
variation
RoHS
Compliant
Standard Part Numbers
Part number Configuration
PA-T2X-38E Single, Anodized, 1 clip
PV-T2X-38E Single, Degreased 1 clip
PA-T21-38E Dual, Anodized 1 clip
PV-T21-38E Dual, Degreased 1 clip
PA-T22-38E Dual, Anodized 2 clips
PV-T22-38E Dual, Degreased 2 clips
