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CN40-30B - 40 mm Round x 30 mm High Alpha Heat Sink - 7.9 °C/W 40 mm Round x 30 mm High Alpha Heat Sink - 7.9 °C/W
The CN40-30B Alpha heat sink offers a natural convection thermal resistance rating of 7.9 °C/W within a 40mm round footprint. The round shaped pins are set in a sparse pattern which makes it easier for air to efficiently flow through the heat sink, making this cooler an ideal choice for either passively or actively cooling high power LEDs. 
CN40-15B - 40 mm Round x 15 mm High Alpha Heat Sink - 10.7 °C/W 40 mm Round x 15 mm High Alpha Heat Sink - 10.7 °C/W
The CN40-15B Alpha heat sink offers a natural convection thermal resistance rating of 10.7 °C/W within a 40mm round footprint. The round shaped pins are set in a sparse pattern which makes it easier for air to efficiently flow through the heat sink, making this cooler an ideal choice for either passively or actively cooling high power LEDs. 
CN40-20B - 40 mm Round x 20 mm High Alpha Heat Sink - 9.5 °C/W 40 mm Round x 20 mm High Alpha Heat Sink - 9.5 °C/W
The CN40-20B Alpha heat sink offers a natural convection thermal resistance rating of 9.5 °C/W within a 40mm round footprint. The round shaped pins are set in a sparse pattern which makes it easier for air to efficiently flow through the heat sink, making this cooler an ideal choice for either passively or actively cooling high power LEDs. 
CN40-25B - 40 mm Round x 25 mm High Alpha Heat Sink - 8.6 °C/W 40 mm Round x 25 mm High Alpha Heat Sink - 8.6 °C/W
The CN40-25B Alpha heat sink offers a natural convection thermal resistance rating of 8.6 °C/W within a 40mm round footprint. The round shaped pins are set in a sparse pattern which makes it easier for air to efficiently flow through the heat sink, making this cooler an ideal choice for either passively or actively cooling high power LEDs. 
CN40-35B - 40 mm Round x 35 mm High Alpha Heat Sink - 7.4 °C/W 40 mm Round x 35 mm High Alpha Heat Sink - 7.4 °C/W
The CN40-35B Alpha heat sink offers a natural convection thermal resistance rating of 7.4 °C/W within a 40mm round footprint. The round shaped pins are set in a sparse pattern which makes it easier for air to efficiently flow through the heat sink, making this cooler an ideal choice for either passively or actively cooling high power LEDs. 
CN40-40B - 40 mm Round x 40 mm High Alpha Heat Sink - 6.9 °C/W 40 mm Round x 40 mm High Alpha Heat Sink - 6.9 °C/W
The CN40-40B Alpha heat sink offers a natural convection thermal resistance rating of 6.9 °C/W within a 40mm round footprint. The round shaped pins are set in a sparse pattern which makes it easier for air to efficiently flow through the heat sink, making this cooler an ideal choice for either passively or actively cooling high power LEDs. 
CN40-45B - 40 mm Round x 45 mm High Alpha Heat Sink - 6.5 °C/W 40 mm Round x 45 mm High Alpha Heat Sink - 6.5 °C/W
The CN40-45B Alpha heat sink offers a natural convection thermal resistance rating of 6.5 °C/W within a 40mm round footprint. The round shaped pins are set in a sparse pattern which makes it easier for air to efficiently flow through the heat sink, making this cooler an ideal choice for either passively or actively cooling high power LEDs. 
 
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