W Series Heatsinks For TO-220, TO-247, and TO-264 devices FeatureS • Reduced Assembly Cost: spring clip and auto-align feature makes fasteners and fixtures obsolete, along with stray metal filings from tapped holes • Maximum Repeatability: clamping force of the spring clip is not degraded by repeated loading and unloading T247-101E T220-101E DT2-101E • Maximum Heat Transfer per Unit Space: maximum T264-101E surface area per unit volume and consistent mount- The unique design (patent pending) of the W Series ing force reduces thermal resistance heat sinks combines a tin plated, solderable, inte- • Maximum Resistance to Shock and Vibration: light gral spring clip with an extruded aluminum heat weight, resilient spring clip locks the component in sink body for an all-in-one solution to through-hole place and is highly resistant to shock and vibration mounting of TO-220, TO-247, and TO-264 packages. • Maximum Reliability: helps prevent short circuits These self-aligning heat sinks feature solderable feet by eliminating metal particles from thread tapping and an integrated clip with 13.2 (lbf) of force on • RoHS Compliant the center of the device to enhance thermal perfor- mance. SerieS SPeciFicatiONS Heatsink For Package Ohmite Resistor Surface Area Thermal Part Number Type Series (in2) Weight Resistance* WA-T220-101E TO-220 TBH25, TCH35 6.5 0.35 oz/10g Rs-a=12°C/W WV-T220-101E Rs-a=13°C/W WA-T247-101E TO-247 TEH70, TEH100 8.4 0.42 oz/12g Rs-a=11°C/W WV-T247-101E Rs-a=12°C/W WA-T264-101E TO-264 TFH85 8.4 0.42 oz/12g Rs-a=11°C/W WV-T264-101E Rs-a=12°C/W WA-DT2-101E TO-220 TBH25, TCH35, 15.1 0.79 oz/22g Rs-a=7°C/W WV-DT2-101E & TO-247 TEH70, TEH100 Rs-a=8°C/W *Natural convection at 10W heat dissipation cHaracteriSticS Heat Sink Aluminum alloy 6063-T5 or equivalent. Spring Clip Music wire, per ASTM A228 Pin Solderable 100% tin over copper strike Interface thermal for improvement, use thermal joint com- resistance pound or 0.005 Grafoil (TGon 800 by Laird) Interface electrical Sil-Pad 900S by Bergquist or equivalent isolation Mounting Vertical thru-hole mount Clip Force 13.2 lbf. Patent Pending (continued) 180 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com

W Series Heatsinks For TO-220, TO-247, and TO-264 devices cHaracteriSticS Heat Dissipation T220-101E, T247-101E and T264-101E DT2-101E Air Velocity (ft./min.) Air Velocity (ft./min.) 200 400 600 800 1000 100 200 400 600 800 1000 250 14 12 Mounting Surface Temp. Riseabove Ambient (C)°12155000000 FArSeireiAdeir tFol oSwide aAloinr gF lFoiwns TTT222246074---111000111EEE, 11628402 Thermal Resistance from MountingSurface to Ambient (C/watts)° Mounting Surface Temp. Riseabove Ambient (C)ϒ11126284400000000 aAloinr gF lFoiwns SiAdeir tFol oSwide FAreireDT2-101E 162840 Thermal Resistance from MountingSurface to Ambient (C/watts)ϒ 0 0 0 0 0 2 4 8 12 16 20 0 2 4 8 12 16 20 Heat Dissipated (watts) Heat Dissipated (watts) dimeNSiONS (in./mm ±0.3mm) Land pattern 0.63" (16.0mm) 0.08" (2.0mm) T220 0.72" (18.3mm) 0.63" T247, T264 0.91" (23.1mm) (16.0mm) T220 0.72" 0.59" 0.500" ø 0.050" (18.3mm) (15.0mm) (12.7mm) (1.3mm) T247(230..49m2"m) (200..28m0"m) (108..711m1m") CL T264(230..49m2"m) (200..28m0"m) (108..711m1m") 0(1.0.56m"m) 1.26" 1.20" (32.0mm (30.5mm ±0.3) ±0.3) ø(2 0.0.0m8m0") 0.27" 0.18" (6.9mm) (4.6mm) 1.71" (43.4mm) ø 0.080" 0.14" REF* (2.0mm) 0.500" 0.711" (3.6mm) (12.7mm) (18.1mm) T247, TT222604 00..5701"" ((1128..70mmmm)) P0.i0n6 d"i a(1m.5emtemr) *IPMCe-e6t1s 0 DT2 CL 0(2.0.08m"m) TShorldoeurginhg-h ole (4.60m.1m8") 0(1.663.0"mm) Requirement 0.28" (16mm) ø 0.050" typ. 0.89" (22.6mm) (1.3mm) 0.59" 0.785" (15mm) (19.4mm) OrderiNg iNFOrmatiON Standard W A - T 2 2 0 - 1 0 1 E part numbers Series Coating Device Package RoHS A- Black Anodized size modifier Compliant WA-T220-101E V- degreased WV-T220-101E N- Alodine 1500 Clear WA-T247-101E WV-T247-101E WA-T264-101E WV-T264-101E WA-DT2-101E WV-DT2-101E rev 3/18-1 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 181