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- ing force reduces thermal resistance The unique design (patent pending) of the W Series 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 2 Part Number Type Series (in ) Weight Resistance* WA-T220-101E Rs-a=12C/W TO-220 TBH25, TCH35 6.5 0.35 oz/10g WV-T220-101E Rs-a=13C/W WA-T247-101E Rs-a=11C/W TO-247 TEH70, TEH100 8.4 0.42 oz/12g WV-T247-101E Rs-a=12C/W WA-T264-101E Rs-a=11C/W TO-264 TFH85 8.4 0.42 oz/12g WV-T264-101E Rs-a=12C/W WA-DT2-101E TO-220 TBH25, TCH35, Rs-a=7C/W 15.1 0.79 oz/22g WV-DT2-101E & TO-247 TEH70, TEH100 Rs-a=8C/W *Natural convection at 10W heat dissipation cHaracteriSticS Heat Sink Aluminum alloy 6063-T5 or equivalent. Spring Clip Music wire, per ASTM A228 Solderable 100% tin over copper strike Pin 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 13.2 lbf. Clip Force Patent Pending (continued) 180 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.comW 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.) 100 200 400 600 800 1000 200 400 600 800 1000 12 250 14 140 T220-101E DT2-101E Air Flow 12 10 T247-101E, 120 200 Side to Side Air Flow T264-101E Side to Side 10 Free 100 8 Air 150 8 80 6 6 60 100 Air Flow 4 along Fins Free 4 40 Air Air Flow 50 2 along Fins 2 20 0 0 0 0 02 4812 16 20 02 4812 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) 0.050 0.72 0.59 0.500 T220 (18.3mm) (15.0mm) (12.7mm) (1.3mm) 0.92 0.785 0.711 C T247 L (23.4mm) (19.4mm) (18.1mm) 0.06 0.92 0.80 0.711 T264 (1.5mm) (23.4mm) (20.2mm) (18.1mm) 1.26 1.20 (32.0mm (30.5mm 0.080 0.3) 0.3) (2.0mm) 0.27 0.18 (6.9mm) (4.6mm) 1.71 (43.4mm) 0.080 0.500 0.711 0.14 REF* (2.0mm) (12.7mm) (18.1mm) (3.6mm) 0.08 *Meets DT2 T220 0.50 (12.7mm) Pin diameter C L (2.0mm) IPC-610 T247, T264 0.71 (18.0mm) 0.06 (1.5mm) 0.63 Through-hole 0.18 (16.0mm) Soldering (4.6mm) 0.28 Requirement (16mm) 0.050 typ. 0.89 (22.6mm) (1.3mm) 0.59 0.785 (15mm) (19.4mm) OrderiNg iNFOrmatiON Standard WA-T220-101E part numbers Series Coating Device Package RoHS A- Black Anodized WA-T220-101E size modifier Compliant 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 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com 181 Mounting Surface Temp. Rise above Ambient (C) Thermal Resistance from Mounting Surface to Ambient (C/watts) Mounting Surface Temp. Rise above Ambient (C) Thermal Resistance from Mounting Surface to Ambient (C/watts)