VRA-55-101E
Heat Sink, IXYS, TO-220, TO-247, 33.9 mm, 39.5 mm, 55 mm
- Manufacturer: OHMITE
- Product type: Natural Convection Heat Sinks
- Available until stocks are exhausted
- SVHC: No SVHC (15-Jan-2018)
- Product Range: VR Series
- Packages Cooled: IXYS, TO-220, TO-247
- Heat Sink Material: Aluminium
- Thermal Resistance: -
- External Width - Metric: 33.9mm
- External Height - Metric: 39.5mm
- External Length - Metric: 55mm
- External Width - Imperial: 1.33"
- External Diameter - Metric: -
- External Height - Imperial: 1.55"
- External Length - Imperial: 2.17"
- External Diameter - Imperial: -
| Delivery and price | |
|---|---|
| Units per pack | 1 |
| Price | 4.59 € |
| Current stock | 10+ |
| Lead time | 30 days |
## **VR Series** ## **Heat Sinks For TO-220, TO-247, Ohmite CS10, and IXYS I4 and CPC PAK** Ohmite introduces the VR series heatsink (Pat. Pending). This series offers a low profile, large surface area and is configurable using a universal cam clip system. The VR series is degined to accommodate TO-220, TO-247, and high power IXYS packages. The VR series is thru hole soldered onto PCBs and is ideal for compact (1U or 2U) packaging with forced convection cooling. |~~**S e R i e S S P e c i F i c at i O N S**~~<br>~~ee eee~~|~~**c h a R a c t e R i S t i c S**~~<br>~~eee~~| |---|---| |**Heatsink**<br>**Surface Area**<br>**Weight**<br>**Length L**|**Heat Sink**<br>AL6063-T5| |**Part Number**<br>**(in2 / mm2)**<br>**(oz/ g)**<br>**(in./ mm)**|**Spring Clip**<br>Music wire, per ASTM A228 with bright nickel plating| |VRA-27-101E<br>14 / 9,112<br>.95 / 27<br>1.06 / 27<br>VRV-27-101E*|**Solder Feet**<br>Steel or brass with pure tin plated. RoHS compliant| |VRA-55-101E<br>28 / 18,224<br>1.9 / 54<br>2.17 / 55<br>VRV-55-101E*|**Thermal Performance**| * Note: Anodized parts are standard; degreased available on request. **==> picture [517 x 414] intentionally omitted <==** **----- Start of picture text -----**<br> * Note: Anodized parts are standard; degreased available on request. 3.50 • Power Dissipation is 10W,<br>for L=27m, single device,<br>20W for L=55mm, double<br>3.00 devices<br>d i m e N S i O N S<br>• Heat Load Area 18mm X<br>ee (mm) 33.9mm 2.50 \ 23mm, metal tab<br>• Use T-pcm as Thermal<br>11.5mm L = 27mm Interface Material or other<br>2.00 TIMs, but the thickness<br>must be smaller than 0.01"<br>1.50 • Ducted Air Flow<br>L = 55mm<br>1.00<br>39.5mm 0.50<br>200 300 400 500 600 700 800<br>21.4mm Flow Velocity (ft./min.)<br>45°C<br>Er 47°C<br>Clip not<br>= 2.5mm included a —— 47°C<br>2.0mm L - 4mm 5 watts applied with 1.03 m/s (200 fpm)<br>Ø 2.67mm air velocity along fins. 52°C<br>11.5mm Land Pattern Air flow<br>2.63mm<br>33.9mm Y X<br>Note: X and Y<br>are user-defined<br>—_ —=<br>L<br>a h O w t O O R d e R<br>Heatsink Clip<br>Not included with heatsink<br>V R V - 5 5 - 1 0 1 E<br>T T I 1 O T C L A - P B - 1 8 E<br>Series Finish Extrusion Modifier RoHS TO TT “TT 1<br>VX A = anodized Lengh in mm Compliant Clip series Type Configuration RoHS<br>V = degreased compliant<br>C/W)Case-to-Ambient Thermal Resistance ( °<br>**----- End of picture text -----**<br> rev 11/20-4 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com **169**
Updated at April 29, 2026
With nearly a century of engineering expertise, Ohmite is a premier manufacturer of high-performance resistive and thermal management products. Founded in 1925, the company has continuously evolved alongside the electronics industry, building a reputation for resolving complex design challenges. Ohmite specializes in delivering reliable solutions for high-current, high-voltage, and high-energy applications across the industrial, medical, aerospace, and transportation sectors. The core of our Ohmite offering centers on their advanced cooling and thermal management solutions, particularly natural convection heat sinks. Engineered to efficiently dissipate thermal energy in demanding environments, these heat sinks help designers overcome critical thermal bottlenecks. By effectively managing heat dissipation, Ohmite's thermal products ensure the optimal performance and extended longevity of sensitive electronic assemblies. Complementing their thermal management expertise, our selection includes precision sensing and circuit protection components. Ohmite's robust force sensors and load cells provide dependable measurement capabilities for specialized industrial applications, while their temperature sensing and compensation NTC thermistors offer accurate environmental monitoring. These product lines reflect Ohmite’s enduring commitment to quality, innovation, and specialized component engineering.
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