ELLIPTICAL FIN BGA HEATSINKS

These heatsinks were created to ease the thermal challenges design engineers face when working with newer BGA and other SMT packaged chipsets incorporating increased chip speed and power requirements. Large fins and lower pressure drop characteristics ensure optimal cooling performance.

FEATURES & BENEFITS

• Ideal for applications with swirling air environments or multiple heatsinks are used in a series (in a row)
• Low pressure drop characteristics provide superior cooling performance
• Attachment options include a plastic BGA clip for easy installation and removal, or Chometrics T710 interface pad
• No modifications or mounting accessories required
• Standard finish includes lightweight Aluminum 6063 with black anodized plating

Size (W X L)	Base Height		Wt.(g)	Thermal Resistance (degrees C/W)					ET Part#
	(mm)	(mm)		100lfm	200lfm	300lfm	500lfm	700lfm
21mm
21.0x21.0	2.6	14.6	7.20	9.532	6.626	5.427	4.260	3.659	HEF21001-15W/2.6
21.0x21.0	2.6	17.6	7.80	7.791	5.441	4.473	3.533	3.051	HEF21001-18W/2.6
21.0x21.0	2.6	20.6	8.40	6.622	4.654	3.844	3.060	2.659	HEF21001-21W/2.6
21.0x21.0	2.6	22.6	8.80	6.037	4.264	3.534	2.830	2.470	HEF21001-23W/2.6
21.0x21.0	2.6	27.6	9.80	5.465	3.832	3.201	2.588	2.272	HEF21001-28W/2.6
21.0x21.0	2.6	32.6	10.80	4.519	3.248	2.752	2.266	2.014	HEF21001-33W/2.6
23mm
23.0x23.0	2.6	14.6	8.70	7.863	5.360	4.381	3.412	2.910	HEF23001-15W/2.6
23.0x23.0	2.6	17.6	9.40	6.430	4.415	3.609	2.827	2.108	HEF23001-18W/2.6
23.0x23.0	2.6	20.6	10.00	5.466	3.774	3.099	2.445	2.108	HEF23001-21W/2.6
23.0x23.0	2.6	22.6	10.50	4.982	3.455	2.846	2.258	1.955	HEF23001-23W/2.6
23.0x23.0	2.6	27.6	11.60	4.390	3.106	2.592	2.087	1.824	HEF23001-28W/2.6
23.0x23.0	2.6	32.6	12.70	3.776	2.709	2.284	1.867	1.649	HEF23001-33W/2.6
25mm
25.0x25.0	2.6	14.6	9.70	6.853	4.629	3.744	2.890	2.467	HEF25001-15W/2.6
25.0x25.0	2.6	17.6	10.40	5.610	3.804	3.087	2.397	2.057	HEF25001-18W/2.6
25.0x25.0	2.6	20.6	11.10	4.772	3.254	2.653	2.075	1.791	HEF25001-21W/2.6
25.0x25.0	2.6	22.6	11.60	4.351	2.981	2.438	1.917	1.662	HEF25001-23W/2.6
25.0x25.0	2.6	27.6	12.70	3.863	2.703	2.244	1.800	1.575	HEF25001-28W/2.6
25.0x25.0	2.6	32.6	13.90	3.323	2.359	1.979	1.611	1.425	HEF25001-33W/2.6
27mm
27.0x27.0	2.6	14.6	11.00	6.694	4.480	3.635	2.858	2.486	HEF27001-15W/2.6
27.0x27.0	2.6	17.6	11.80	5.472	3.674	2.989	2.362	2.063	HEF27001-18W/2.6
27.0x27.0	2.6	20.6	12.60	4.648	3.136	2.560	2.036	1.788	HEF27001-18W/2.6
27.0x27.0	2.6	22.6	13.10	4.234	2.867	2.348	1.876	1.654	HEF27001-23W/2.6
27.0x27.0	2.6	27.6	14.50	3.817	2.657	2.213	1.803	1.604	HEF27001-28W/2.6
27.0x27.0	2.6	32.6	15.80	3.275	2.309	1.941	1.604	1.441	HEF27001-33W/2.6
31mm
31.0x31.0	2.6	14.6	15.30	5.221	3.331	2.664	2.007	1.698	HEF31001-15W/2.6
31.0x31.0	2.6	17.6	16.70	4.274	2.735	2.177	1.660	1.410	HEF31001-18W/2.6
31.0x31.0	2.6	20.6	18.00	3.633	2.335	1.866	1.431	1.222	HEF31001-21W/2.6
31.0x31.0	2.6	22.6	18.90	3.310	2.136	1.711	1.319	1.131	HEF31001-23W/2.6
31.0x31.0	2.6	27.6	21.10	2.880	1.915	1.558	1.227	1.060	HEF31001-28W/2.6
31.0x31.0	2.6	32.6	23.40	2.470	1.663	1.365	1.090	0.952	HEF31001-33W/2.6
35mm
35.0x35.0	2.6	14.6	20.90	4.538	2.932	2.339	1.804	1.550	HEF35001-15W/2.6
35.0x35.0	2.6	17.6	22.60	3.713	2.404	1.922	1.488	1.283	HEF35001-18W/2.6
35.0x35.0	2.6	20.6	23.70	3.154	2.050	1.643	1.279	1.108	HEF35001-21W/2.6
35.0x35.0	2.6	22.6	26.40	2.872	1.872	1.504	1.176	1.022	HEF35001-23W/2.6
35.0x35.0	2.6	27.6	29.20	2.529	1.684	1.372	1.089	0.955	HEF35001-28W/2.6
35.0x35.0	2.6	32.6	20.90	2.163	1.456	1.196	0.962	0.851	HEF35001-33W/2.6
37.5mm
37.5x37.5	2.6	14.6	22.20	4.215	2.737	2.206	1.737	1.514	HEF37001-15W/2.6
37.5x37.5	2.6	17.6	24.10	3.449	2.243	1.811	1.431	1.251	HEF37001-18W/2.6
37.5x37.5	2.6	20.6	26.10	2.929	1.911	1.547	1.229	1.079	HEF37001-21W/2.6
37.5x37.5	2.6	22.6	27.40	2.667	1.745	1.416	1.129	0.994	HEF37001-23W/2.6
37.5x37.5	2.6	27.6	30.60	2.325	1.539	1.259	1.014	0.897	HEF37001-28W/2.6
37.5x37.5	2.6	32.6	33.90	1.988	1.329	1.096	0.894	0.798	HEF37001-33W/2.6
40mm
40.0x40.0	2.6	14.6	25.20	3.652	2.360	1.865	1.409	1.189	HEF40001-15W/2.6
40.0x40.0	2.6	17.6	27.40	2.992	1.936	1.533	1.163	0.984	HEF40001-18W/2.6
40.0x40.0	2.6	20.6	29.60	2.543	1.651	1.311	0.999	0.850	HEF40001-21W/2.6
40.0x40.0	2.6	22.6	31.10	2.316	1.508	1.200	0.918	0.784	HEF40001-23W/2.6
40.0x40.0	2.6	27.6	34.70	2.031	1.346	1.088	0.849	0.732	HEF40001-28W/2.6
40.0x40.0	2.6	32.6	38.40	1.737	1.163	0.948	0.749	0.652	HEF40001-33W/2.6
42.5mm
42.5x42.5	2.6	14.6	27.80	3.387	2.101	1.646	1.231	1.032	HEF42.5001-15W/2.6
42.5x42.5	2.6	17.6	30.20	2.775	1.724	1.353	1.015	0.854	HEF42.5001-18W/2.6
42.5x42.5	2.6	20.6	32.60	2.359	1.470	1.156	0.872	0.737	HEF42.5001-21W/2.6
42.5x42.5	2.6	22.6	34.20	2.148	1.342	1.058	0.801	0.679	HEF42.5001-23W/2.6
42.5x42.5	2.6	27.6	38.20	1.857	1.191	0.951	0.733	0.628	HEF42.5001-28W/2.6
42.5x42.5	2.6	32.6	42.20	1.587	1.028	0.828	0.646	0.558	HEF42.5001-33W/2.6
45mm
45.0x45.0	2.6	14.6	31.20	3.062	1.942	1.523	1.146	0.965	HEF45001-15W/2.6
45.0x45.0	2.6	17.6	34.00	2.510	1.594	1.252	0.945	0.798	HEF45001-18W/2.6
45.0x45.0	2.6	20.6	36.70	2.134	1.359	1.069	0.811	0.688	HEF45001-21W/2.6
45.0x45.0	2.6	22.6	38.60	1.943	1.240	0.978	0.744	0.633	HEF45001-23W/2.6
45.0x45.0	2.6	27.6	43.20	1.685	1.095	0.875	0.677	0.539	HEF45001-28W/2.6
45.0x45.0	2.6	32.6	47.80	1.440	0.945	0.761	0.595	0.478	HEF45001-33W/2.6