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D Series Heatsinks
For SMT devices
TO-263 (D2) TO-268 (D3) 1.02" 1.22" 25.91mm 31.0mm
0.50" 12.7mm
0.40" 10.16mm
Note: order TO-263 for TO-252 devices
0.27" 6.86mm 0.44" (11.2mm) 0.56" (14.2mm) 0.63" (16.1mm) 0.75" (19.1mm) TO-263 (D2) TO-268 (D3)
0.10" 2.54mm
Land PaTTern TO-263 (D2)
use also for TO-252 (D) 0.64" (16.3mm) 0.62" (15.8mm) 0.35" (8.89mm) 0.44" (11.2mm) TO-252 (D) TO-263 (D2)
Ohmite D Series heatsinks provide an innovative solution for SMT compatible semiconductors and resistors. The unique design (Patent Pending) combines tin plated, solderable rods with an aluminum extruded heat sink body. These rods (or "rollers") are mated mechanically to the heatsink by forging to reduce the thermal resistance between the heatsink body and the solderable feet. Specifically designed for use with the increasingly popular TO-252, TO-263 and TO-268 packages, the D Series affords the user superior thermal performance over the more common stamped aluminum heatsinks. By eliminating the staking joint typically used in stamped heatsinks, the resulting air gap and thermal "bottleneck" is also eliminated, while surface area for cooling is maximized with the extruded fins of the D Series body.
FeaTureS
* Increased thermal performance up to 30% over bright copper heat sinks from improved radiation of the black finish * Increased surface areas by 3 times therefore thermal performance up to 300% over the aluminum stamped heat sinks on markets * Unique aluminum extrusion design reduces the heat sink cost ver sus similar designs utilizing copper * Light weight aluminum construction allows faster pick and place assembly reducing the manufacturing cycle time * Radius mounted "Rollers" are designed for maximizing heat transfer from the component and avoiding the thermal "bottleneck" seen in stamped and staked heatsinks. * Available in bulk packaging or tape & reel (250 units per reel * Weight: D2 (TO-263): 3.8g D3 (TO-268): 4.1g * RoHSCompliant
HeaT diSSiPaTion
Air Velocity(ft./min.) 60 55 CaseTemp.Riseabove Ambient(C) 200 400 600 800 1000 14
0.56" (14.2mm)
also for TO-252 (D)
12
0.54" (13.7mm)
50 45 40
10
0.06" (1.40mm)
TO-268 (D3)
0.83" (21.1mm)
0.076" (1.94mm) TO-252 (D) 0.03" (0.80mm) TO-263 (D2)
8 35 30 25 2 4 8 6 HeatDissipated(watts) 10 6
4
0.81" (20.6mm) 0.63" (16.0mm)
50
Air Velocity(ft./min.) 200 400 600 800 1000 12 ThermalResistancefromMounting SurfacetoAmbient(C/watts)
CaseTemp.Riseabove Ambient(C)
0.56" (14.2mm)
0.54" (13.7mm)
45
TO-268 (D3)
10
40 8 35 6
0.06" (1.40mm)
0.03" (0.80mm)
30
TaPe and reeL
Pocket depth: 0.41" (10.50mm) Pocket pitch: 0.79" (20.00mm) Reel diameter: 13.00" (330.00mm) 250 pcs. per reel
0.41" 10.5mm 0.94" 24mm 0.16" 4mm
25 2 4 8 6 HeatDissipated(watts) 10 4
S ta n d a r d pa rt n u m b e r S F o r d S e r i e S
Part number DV-T263-101E DA-T263-101E DV-T263-101E-TR DA-T263-101E-TR DV-T268-101E DA-T268-101E DV-T268-101E-TR DA-T268-101E-TR description for for for for for for for for D2 D2 D2 D2 D3 D3 D3 D3 pack, pack, pack, pack, pack, pack, pack, pack, degreased finish black anodized finish degreased finish black anodized finish degreased finish black anodized finish degreased finish black anodized finish Packaging Bulk Bulk Reel Reel Bulk Bulk Reel Reel
1.59" 1.73" 40.4mm 44mm
o0.06" 1.55mm
Note: order TO-263 for TO-252 devices
1
Ohmite Mfg. Co. 1600 Golf Rd., Rolling Meadows, IL 60008 * 1-866-9-OHMITE * Int'l 1-847-258-0300 * Fax 1-847-574-7522 * www.ohmite.com * info@ohmite.com
ThermalResistancefromMounting SurfacetoAmbient(C/watts)
TO-263 (D2)

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