For more information, please visit the product page. date 03/29/2017 page 1 of 3 MODEL: HSS-B20-NP-11 │ DESCRIPTION: HEAT SINK FEATURES • • • • TO-220 package round hole for component attachment black anodized finish aluminum MODEL thermal resistance1 @ 75°C ΔT, nat conv (°C/W) @ 1 W, nat conv (°C/W) @ 1 W, 200 LFM (°C/W) @ 1 W, 400 LFM (°C/W) @ 75°C ΔT, nat conv (W) 17.05 22.64 6.86 5.08 4.40 HSS-B20-NP-11 Note: power dissipation1 1. See performance curves for full thermal resistance details. PERFORMANCE CURVES 100 Heatsink Temperature Rise Above Ambient (ΔT = Ths - Ta) (°C) Natural Conv. 200 LFM 400 LFM 0 0 0 0 1 22.64 6.86 5.08 2 39.83 14.30 10.75 3 55.63 21.31 16.28 4 69.75 28.40 21.66 5 83.29 35.60 27.37 Ths: “hot spot” temperature measured on the heatsink Ta: ambient temperature Mounting Surface Temperature Rise Above Ambient (°C) Power (W) Without Airflow 90 200 LFM 80 400 LFM 70 60 50 40 30 20 10 0 0 cui.com 1 2 3 Dissipated Power (W) 4 5 For more information, please visit the product page. CUI Inc │ MODEL: HSS-B20-NP-11 │ DESCRIPTION: HEAT SINK date 03/29/2017│ page 2 of 3 MECHANICAL DRAWING units: mm tolerance: ±0.5 mm cui.com MATERIAL AL1050 FINISH black anodized THICKNESS 1.0 mm WEIGHT 2.4 g For more information, please visit the product page. CUI Inc │ MODEL: HSS-B20-NP-11 │ DESCRIPTION: HEAT SINK date 03/29/2017│ page 3 of 3 REVISION HISTORY rev. 1.0 description date initial release 03/29/2017 The revision history provided is for informational purposes only and is believed to be accurate. Headquarters 20050 SW 112th Ave. Tualatin, OR 97062 800.275.4899 Fax 503.612.2383 cui.com [email protected] CUI offers a one (1) year limited warranty. Complete warranty information is listed on our website. CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use. CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.