VR Series
Heat Sinks For TO-220, TO-247, Ohmite CS10,
and IXYS I4 and CPC PAK
Ohmite introduces the VR series heatsink (Pat. Pending).
This series offers a low profile, large surface area and is con-
figurable using a universal cam clip system. The VR series is
degined to accommodate TO-220, TO-247, and high power
IXYS packages. The VR series is thru hole soldered onto
PCBs and is ideal for compact (1U or 2U) packaging with
forced convection cooling.
SeRieS SPeciFicatiONS chaRacteRiSticS
Heat Sink AL6063-T5
Heatsink Surface Area Weight Length L
2 2
Part Number (in / mm ) (oz / g) (in. / mm)
Spring Clip Music wire, per ASTM A228 with bright nickel plating
VRA-27-101E
14 / 9,112 .95 / 27 1.06 / 27
Solder Feet Steel or brass with pure tin plated. RoHS compliant
VRV-27-101E*
VRA-55-101E
Thermal Performance
28 / 18,224 1.9 / 54 2.17 / 55
VRV-55-101E*
* Note: Anodized parts are standard; degreased available on request.
3.50 Power Dissipation is 10W,
for L=27m, single device,
20W for L=55mm, double
3.00 devices
dimeNSiONS
Heat Load Area 18mm X
23mm, metal tab
(mm) 2.50
33.9mm
Use T-pcm as Thermal
11.5mm L = 27mm
Interface Material or other
2.00
TIMs, but the thickness
must be smaller than 0.01"
1.50 Ducted Air Flow
L = 55mm
1.00
39.5mm 0.50
200 300 400 500 600 700 800
21.4mm Flow Velocity (ft./min.)
45C
47C
Clip not
2.5mm included
47C
5 watts applied with
2.0mm L - 4mm
1.03 m/s (200 fpm)
52C
air velocity along fins.
2.67mm
Air flow
11.5mm Land Pattern
2.63mm
33.9mm
Y X
Note: X and Y
are user-defined
L
hOw tO ORdeR
Heatsink Clip
Not included with heatsink
VRV-55-101E
CLA-PB-18E
Series Finish Extrusion Modifier RoHS
VX A = anodized Lengh in mm Compliant
Clip series Type Configuration RoHS
V = degreased
compliant
rev 11/20-4
1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info@ohmite.com 169
Case-to-Ambient Thermal Resistance (C/W)X-ON Electronics
Largest Supplier of Electrical and Electronic Components
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