# Heat Sink, 3.13 °C/W, TO-220, TO-247, TO-264, 55 mm, 38.6 mm, 31.5 mm
**URL**: https://novapart.co/products/PA-T21-38E/heat-sink-313-c-w-to-220-247-264-55-mm-386-315
**SKU**: PA-T21-38E
**Manufacturer**: OHMITE
**Category**: Cooling & Thermal Management || Heat Sinks || Natural Convection Heat Sinks
**Price**: €5.2400
**Stock**: 10+
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (27-Jun-2024) |
| Product Range | P Series |
| Packages Cooled | TO-220, TO-247, TO-264 |
| Heat Sink Material | Aluminium Alloy |
| Thermal Resistance | 3.13°C/W |
| External Width - Metric | 55mm |
| External Height - Metric | 38.6mm |
| External Length - Metric | 31.5mm |
| External Width - Imperial | 2.17" |
| External Diameter - Metric | - |
| External Height - Imperial | 1.52" |
| External Length - Imperial | 1.24" |
| External Diameter - Imperial | - |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:4037126/)
## **P Series Heatsinks Forged Pin Fin heatsink for TO-247 and TO-264 devices**
Ohmite introduces the P series forged pin-fin heatsink (Pat. Pending). The P series heat sinks offer an all-in-one solution combining a compact design with a universal cam clip system for TO-220, TO-247, TO-264 package devices. TO-220 devices can be attached using non-standard cam clips (contact Ohmite for details). This powerful forged pin heatsink is designed to be thru-hole soldered to the PCB board. The forged pin design allows forced convection cooling in multiple directions.
The pin fin design allows for a larger surface area creating minimum thermal flow impedance. The P series is the ideal type of heat sink for high power and small size (1U or 2U) electronic packaging with natural and forced convection cooling.
|~~**S e r i e S S P e c i F i c at i O N S**~~
~~ee~~|~~**S e r i e S S P e c i F i c at i O N S**~~
~~ee~~|~~**S e r i e S S P e c i F i c at i O N S**~~
~~ee~~|~~**S e r i e S S P e c i F i c at i O N S**~~
~~ee~~|~~**S e r i e S S P e c i F i c at i O N S**~~
~~ee~~|~~**S e r i e S S P e c i F i c at i O N S**~~
~~ee~~|
|---|---|---|---|---|---|
|||**Surface**||||
|**Heatsink**||**Area**|**Weight**|**Width**|**Rθc-a***|
|**Part Number**|**Configuration**|**(in2 /mm2)**|**(oz./g)**|**(in /mm)**|**(°C/W)**|
|PA-T2X-38E|Single, 1 clip|13.4 / 8,675|0.7 / 20|1.18 / 30|7.46|
|PV-T2X-38E|Single,1 clip|13.4 / 8,675|0.7 / 20|1.18 / 30|8.07|
|PA-T21-38E|Dual, 1 clip|23 / 14,823|1.3 / 39|2.17 / 55|3.13|
|PV-T21-38E|Dual,1 clip|23 / 14,823|1.3 / 39|2.17 / 55|3.89|
|PA-T22-38E|Dual, 2 clip|23 / 14,823|1.3 / 39|2.17 / 55|3.13|
|PV-T22-38E|Dual,2 clip|23 / 14,823|1.3 / 39|2.17 / 55|3.89|
*--Thermal Resistance is in open space @14 W power dissipation (28 watts for T21-T22 dual)
## ~~ee~~ ~~**c H a r a c t e r i S t i c S**~~
**Heat sink** AL1070 **Spring clip** Music Wire, Per ASTM A228 with bright nickel plating **Solder feet** Brass with pure tin or nickel. RoHS compliant **Interface** For improvement, use thermal joint compound, **thermal** 0.005 Grafoil (TGon 800 by Laird), or phase **resistance** change material (Hi-Flow by Bergquist) **Insulator** Sil-Pad 900-S, K6 800-S and K10 by Bergquist
**Thermal Performance**
**==> picture [260 x 117] intentionally omitted <==**
**----- Start of picture text -----**
120 120
100 100
Single: T2X Double: T21-T22
80 80
60 60
40 40
20 20
0 0
0 6 8 10 12 16 0 12 16 20 24 28
Heat Dissipated (watts) Heat Dissipated (watts)
C)above Ambient ( ° C)above Ambient ( °
Average Case Temp. Rise Average Case Temp. Rise
**----- End of picture text -----**
**172** 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
## **P Series Heatsinks Forged Pin Fin heatsink for TO-247 and TO-264 devices**
## ~~**d i m e N S i O N S**~~
**==> picture [485 x 325] intentionally omitted <==**
**----- Start of picture text -----**
Dual: T21 and T22 Single:
2.17" Single: T2X 0.45" REF
(55.1mm) (11.4mm)
1.18" Dual: 0.69"
1.11 " (30.0mm) 0.55" REF (17.5mm)
(28.2mm) (14.0mm)
1.52" 1.50" 1.40"
(38.6mm) (38.1mm) (35.6mm)
0.65
(16.5mm)
0.10" REF
1.62" (2.5mm) Single: Dual:
(41.1mm) 0.122" 0.125"
(3.1mm) (3.2mm)
Single: Dual:
Land 1.18" 2.17"
Pattern (30.0mm) (55.1mm)
Note: For dual
heat sink, Device ø0.105" pth
(2.67mm)
holes spaced 1.11" [28.2mm] 0.69"
and 0.555" (17.5mm)
[14.1mm] equally
from center line 0.12"
(3.0mm)
Single: Dual:
0.71" 1.62"
(18.0mm) (41.1mm)
**----- End of picture text -----**
## ~~**O r d e r i N g i N F O r m at i O N**~~
TO- devices **Package Packagevariation Standard Part Numbers Part number Configuration P A - T 2 X - 3 8 E** PA-T2X-38E Single, Anodized, 1 clip PV-T2X-38E Single, Degreased 1 clip **Series Finish Height RoHS** P A = anodized (mm) **Compliant** PA-T21-38E Dual, Anodized 1 clip V = degreased PV-T21-38E Dual, Degreased 1 clip PA-T22-38E Dual, Anodized 2 clips PV-T22-38E Dual, Degreased 2 clips
**==> picture [146 x 41] intentionally omitted <==**
rev 3/21-1
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
**173**
## Links
- [View this product on Novapart](https://novapart.co/products/PA-T21-38E/heat-sink-313-c-w-to-220-247-264-55-mm-386-315)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/ohmite/pa-t21-38e/heat-sink-aluminium-31-5x55x38/dp/4037126)
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