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HSE-B20380-040H
HEAT SINK EXTRUSION TO 38 X 29 X 12.5 MM
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: SAME SKY
- Product type: Natural Convection Heat Sinks
- SVHC: No SVHC (04-Feb-2026)
| Delivery and price | |
|---|---|
| Units per pack | 1200 |
| Price | 1.76 € |
| Current stock | 10+ |
| Lead time | 30 days |
Datasheet
CUI Devices is now Same Sky! Learn More **date** 09/12/2024 **page** 1 of 5 Additional Resources: Product Page | 3D Model | PCB Footprint ## **SERIES:** HSE-B20X | **DESCRIPTION:** HEAT SINK ## **FEATURES** - TO-220 package - placement pins for secure PCB attachment - round hole for component attchment - multiple available cut lengths |**MODEL**|||**thermal resistance**|**thermal resistance1**||**power**<br>**dissipation1**| |---|---|---|---|---|---|---| ||**length**|**@ 75**°**C**Δ**T, nat**|**@ 1 W,**|**@ 1 W,**|**@ 1 W,**|**@ 75°C**Δ**T, nat**| |||**conv**(°C/W)|**nat conv**|**200 LFM**|**400 LFM**|**conv**| ||(mm)||(°C/W)|(°C/W)|(°C/W)|(W)| |HSE-B20250-040H|25|15.00|19.57|4.28|3.44|5.00| |HSE-B20270-040H|27|12.50|17.29|3.64|2.82|6.00| |HSE-B20380-040H|38|10.14|13.19|3.94|2.44|7.40| |HSE-B20500-040H|50|8.43|11.17|4.85|3.17|8.90| |HSE-B20630-040H|63|7.81|11.54|3.73|2.31|9.60| ## **MODEL** Note: 1. See performance curves for full thermal resistance details. 2. Custom cut to length options available. Thermal data not available on custom lengths. ## **PERFORMANCE CURVES** ## **HSE-B20250-040H** **==> picture [557 x 215] intentionally omitted <==** **----- Start of picture text -----**<br> 100<br>Without Airflow<br>Heatsink Temperature Rise Above 90<br>Ambient ( Δ T = Ths - Ta) (°C) 200 LFM<br>Ee Power Natural 80 400 LFM e<br>200 LFM 400 LFM<br> (W) Conv.<br>re 70 e LZe<br>0 0 0 0<br>1 19.57 4.28 3.44 60<br>ee<br>2 35.77 8.76 6.98<br>50<br>es TTT TT eLE EEE ETE EEE<br>3 49.68 13.06 10.36<br>ee 4 62.71 ee 17.44 13.88 40 LEE YEE EEyE E | Ee<br>ee 7 eee<br>5 74.79 21.93 17.35 30<br>ee tA EE |ee<br>6 85.46 26.39 20.74<br>20<br>7 97.48 30.77 24.33<br>8 108.09 35.20 27.77 10<br>es ee | Ler<br>9 117.16 39.64 31.31 0<br>ee ee ee Zeartiilli<br>0 1 2 3 4 5 6 7 8 9 10<br>10 127.50 43.98 34.86<br>Dissipated Power (W)<br>re ili i titty tt<br>Rise Above Ambient (°C)<br>Mounting Surface Temperature<br>**----- End of picture text -----**<br> Ths: “hot spot” temperature measured on the heatsink Ta: ambient temperature **sameskydevices.com** Additional Resources: Product Page | 3D Model | PCB Footprint **SAME SKY** | **SERIES:** HSE-B20X | **DESCRIPTION:** HEAT SINK **date** 09/12/2024 | **page** 2 of 5 ## **PERFORMANCE CURVES (CONTINUED)** ## **HSE-B20270-040H** ||Heatsink Temperature Rise Above<br>Ambient (ΔT = Ths - Ta) (°C)|Heatsink Temperature Rise Above<br>Ambient (ΔT = Ths - Ta) (°C)|Heatsink Temperature Rise Above<br>Ambient (ΔT = Ths - Ta) (°C)| |---|---|---|---| |Power<br>(W)|Natural<br>Conv.|200 LFM|400 LFM| |0|0|0|0| |1|17.29|3.64|2.82| |2|30.91|7.46|5.30| |3|43.23|11.24|7.93| |4|55.60|15.12|10.61| |5|66.37|18.95|13.43| |6|75.86|22.92|16.06| |7|88.12|27.03|18.81| |8|98.44|30.78|21.69| |9|107.17|34.75|24.44| |10|114.29|38.96|27.31| Ths: “hot spot” temperature measured on the heatsink Ta: ambient temperature ## **HSE-B20380-040H** ||Heatsink Temperature Rise Above<br>Ambient (ΔT = Ths - Ta) (°C)|Heatsink Temperature Rise Above<br>Ambient (ΔT = Ths - Ta) (°C)|Heatsink Temperature Rise Above<br>Ambient (ΔT = Ths - Ta) (°C)| |---|---|---|---| |Power<br>(W)|Natural<br>Conv.|200 LFM|400 LFM| |0|0|0|0| |1|13.19|3.94|2.44| |2|24.78|7.39|4.83| |3|35.70|10.40|7.28| |4|45.65|13.83|9.74| |5|55.23|17.18|12.65| |6|63.54|20.84|15.21| |7|72.54|24.44|17.81| |8|79.48|27.50|20.30| |9|88.15|31.14|22.93| |10|95.46|34.74|25.35| Ths: “hot spot” temperature measured on the heatsink **==> picture [329 x 517] intentionally omitted <==** **----- Start of picture text -----**<br> 100<br>Without Airflow<br>90<br>200 LFM<br>80 400 LFM<br>70<br>60<br>50<br>40<br>30<br>20<br>10<br>0<br>0 1 2 3 4 5 6 7 8 9 10<br>Dissipated Power (W)<br>100<br>Without Airflow<br>90<br>200 LFM<br>80 400 LFM<br>70<br>60<br>50<br>40<br>30<br>20<br>10<br>0<br>0 1 2 3 4 5 6 7 8 9 10<br>Dissipated Power (W)<br>Rise Above Ambient (°C)<br>Mounting Surface Temperature<br>Rise Above Ambient (°C)<br>Mounting Surface Temperature<br>**----- End of picture text -----**<br> Ta: ambient temperature **sameskydevices.com** Additional Resources: Product Page | 3D Model | PCB Footprint **SAME SKY** | **SERIES:** HSE-B20X | **DESCRIPTION:** HEAT SINK **date** 09/12/2024 | **page** 3 of 5 ## **PERFORMANCE CURVES (CONTINUED)** ## **HSE-B20500-040H** ||Heatsink Temperature Rise Above<br>Ambient (ΔT = Ths - Ta) (°C)|Heatsink Temperature Rise Above<br>Ambient (ΔT = Ths - Ta) (°C)|Heatsink Temperature Rise Above<br>Ambient (ΔT = Ths - Ta) (°C)| |---|---|---|---| |Power<br>(W)|Natural<br>Conv.|200 LFM|400 LFM| |0|0|0|0| |1|11.17|4.85|3.17| |2|21.14|10.05|6.33| |3|30.25|14.84|9.65| |4|39.30|19.90|13.13| |5|46.48|25.12|16.36| |6|54.89|29.54|19.59| |7|62.00|34.62|22.84| |8|69.07|39.48|26.34| |9|76.23|44.22|29.71| |10|83.48|49.11|33.00| Ths: “hot spot” temperature measured on the heatsink Ta: ambient temperature ## **HSE-B20630-040H** ||Heatsink Temperature Rise Above<br>Ambient (ΔT = Ths - Ta) (°C)|Heatsink Temperature Rise Above<br>Ambient (ΔT = Ths - Ta) (°C)|Heatsink Temperature Rise Above<br>Ambient (ΔT = Ths - Ta) (°C)| |---|---|---|---| |Power<br>(W)|Natural<br>Conv.|200 LFM|400 LFM| |0|0|0|0| |1|11.54|3.73|2.31| |2|20.64|7.85|5.18| |3|29.05|11.97|8.07| |4|36.88|15.99|10.94| |5|44.10|20.26|13.85| |6|51.10|24.12|16.67| |7|58.10|28.27|19.57| |8|64.79|32.25|22.39| |9|71.36|36.28|25.03| |10|77.70|40.39|28.03| Ths: “hot spot” temperature measured on the heatsink Ta: ambient temperature **==> picture [329 x 517] intentionally omitted <==** **----- Start of picture text -----**<br> 100<br>Without Airflow<br>90<br>200 LFM<br>80 400 LFM<br>70<br>60<br>50<br>40<br>30<br>20<br>10<br>0<br>0 1 2 3 4 5 6 7 8 9 10<br>Dissipated Power (W)<br>100<br>Without Airflow<br>90<br>200 LFM<br>80 400 LFM<br>70<br>60<br>50<br>40<br>30<br>20<br>10<br>0<br>0 1 2 3 4 5 6 7 8 9 10<br>Dissipated Power (W)<br>Rise Above Ambient (°C)<br>Mounting Surface Temperature<br>Rise Above Ambient (°C)<br>Mounting Surface Temperature<br>**----- End of picture text -----**<br> **sameskydevices.com** Additional Resources: Product Page | 3D Model | PCB Footprint **SAME SKY** | **SERIES:** HSE-B20X | **DESCRIPTION:** HEAT SINK **date** 09/12/2024 | **page** 4 of 5 ## **MECHANICAL DRAWING** units: mm tolerance: ±0.5 mm |MATERIAL|AL 6063-T5| |---|---| |FINISH|black anodized| |PIN MATERIAL|steel| |PIN PLATING|tin| **==> picture [323 x 318] intentionally omitted <==** |**MODEL NO.**<br>**LE**<br>|**NGTH, L**<br>**(mm)**<br>**W**|**EIGHT**<br>**(g)**| |---|---|---| |HSE-B20250-040H*|25|12| |HSE-B20270-040H*|27|13| |HSE-B20380-040H|38|15| |HSE-B20500-040H|50|22| |HSE-B20630-040H|63|24| Note: * Mounting hole not present on 25 & 27 mm length models. **sameskydevices.com** Additional Resources: Product Page | 3D Model | PCB Footprint **SAME SKY** | **SERIES:** HSE-B20X | **DESCRIPTION:** HEAT SINK **date** 09/12/2024 | **page** 5 of 5 ## **REVISION HISTORY** |**rev.**|**description**|**date**| |---|---|---| |1.0|initial release|05/11/2017| |1.01|updated datasheet|09/07/2017| |1.02|brand update|02/10/2020| |1.03|updated datasheet|04/22/2022| |1.04|logo, datasheet style update|08/05/2022| |1.05|CUI Devices rebranded to Same Sky|09/12/2024| The revision history provided is for informational purposes only and is believed to be accurate. Same Sky offers a one (1) year limited warranty. Complete warranty information is listed on our website. Same Sky reserves the right to make changes to the product at any time without notice. Information provided by Same Sky is believed to be accurate and reliable. However, no responsibility is assumed by Same Sky for its use, nor for any infringements of patents or other rights of third parties which may result from its use. Same Sky 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. **sameskydevices.com**
Updated at April 29, 2026
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