F and R Series Heatsinks
1.638"
(41.6mm)
For TO-218, TO-220 and TO-247 devices
0.47"
(12.0mm)
0.059"
(1.5mm)
0.98"
(25.±mm)
0.98"
(25.0mm)
0.669"
(17.±mm
+±.2/-±)
F Series
0.98"
(25.0mm)
1.65"
(42.0mm)
ø0.14"
(3.6mm)
R Series
ø0.125" .00ꢀ
(3.17mm ±±.1)
(no top hole on
FA-T22±-25E)
H
0.56ꢁꢁ
H
0.56ꢀꢀ
1.000"
(25.4mm)
0.720"
(18.3mm)
0.75"
(19.1mm)
0.520"
(13.2mm)
0.370"
(9.4mm)
0.138"
(3.5mm +.3/-.1)
0.ꢀ37"
(11.1mm)
ø0.091"
(2.3mm)
ø0.091"
(2.3mm)
1.000"
(25.4mm 0.1)
1.000"
(25.4mm ±±.1)
F ꢀ A T ꢂ R ꢀ S
• For vertical mounting with sol-
derable pins
• For TO-220, TO-218, TO-247
Height
For
Ohmite
Resistor
Series
Surface
Area
Thermal
Resistance*
Weight (g) (°C/W)
Heatsink
(in. .010 / Package
Part Number mm ± ±.2) Type
(mm2)
RA-T2X-25E 1.0/25.4
RA-T2X-38E 1.5/38.1
RA-T2X-51E 2.0/50.8
RA-T2X-64E 2.5/63.5
FA-T220-25E 1.0 / 25.4 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100
FA-T220-38E 1.5 / 38.1 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100
FA-T220-51E 2.0 / 50.8 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100
FA-T220-64E 2.5 / 63.5 TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100
TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100
TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100
TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100
TO-220, -218, -247 TBH25,TCH35, TEH70, TEH100
8,901
12,983
17,065
21,148
9,285
13,756
18,222
22,814
25
38
51
63
18
27
37
46
4.8
3.9
3.5
3.1
4.7
3.8
3.4
3
S P ꢀ C ꢁ F ꢁ C A T ꢁ O N S
Finish: Black anodized
Material: 6063-T5 aluminum
Solder: 100% Tin (Sn)
PC board attachement: 0.091”
dia. pre-tinned pins.
*Natural convection
O R D E R I N G I N F O R M AT I O N
S TA N D A R D p A R T N u M b E R S F O R F A N D R S E R I E S
Part Number Description
Packaging
Series
F or R
T2X = R Series
T220 = F Series
RoHS Compliant
RA-T2X-25E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
RA-T2X-38E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
RA-T2X-51E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
RA-T2X-64E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
R A - T 2 X - 2 5 E
Finish
A = black anodized
V = degreased
Height
(mm)
FA-T220-25E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
FA-T220-38E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
FA-T220-51E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
FA-T220-64E Heat sink for TO-220, TO-218, TO-247, Black Anodized Bulk
H ꢀ A T D ꢁ S S ꢁ P A T ꢁ O N
R Series
F Series
Air Velocity (ft./min.)
Air Velocity (ft./min.)
0
100 200 300 400 500 600 700 800 900 1000
0
100 200 300 400 500 600 700 800 900 1000
100
90
80
70
60
50
40
30
20
10
0
5
100
90
80
70
60
50
40
30
20
10
0
5
H = 1"
H = 1.5"
H = 2"
H = 1"
H = 1.5"
4.5
4
4.5
H = 2"
H = 2.5"
4
H = 2.5"
3.5
3
3.5
3
2.5
2
2.5
2
1.5
1
1.5
1
0.5
0.5
0
0
0
2
4
6
8
10
12
14
16
18
20
0
2
4
6
8
10
12
14
16
18
20
Heat Dissipated (watts)
Heat Dissipated (watts)
Ohmite Mfg. Co. 1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
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