F and R Series Heatsinks
For TO-218, TO-220 and TO-247 devices
0.47"
(12.0mm)
1.638"
(41.6mm)
0.059"
(1.5mm)
0.98"
(25.0mm)
0.98"
(25.0mm)
0.98"
(25.0mm)
1.65"
(42.0mm)
0.669"
(17.0mm
+0.2/-0)
F Series
R Series
ø0.14"
(3.6mm)
ø0.125" ±.004
(3.17mm ±0.1)
(no top hole on
FA-T220-25E)
H ±0.56mm
H ±0.56mm
1.000"
(25.4mm)
0.75"
(19.1mm)
0.370"
(9.4mm)
0.437"
(11.1mm)
1.000"
(25.4mm ±0.1)
0.720"
0.520"
(18.3mm)
(13.2mm)
0.138"
(3.5mm +.3/-.1)
ø0.091"
(2.3mm)
1.000"
(25.4mm ±0.1)
ø0.091"
(2.3mm)
FeATuReS
• For vertical mounting with sol-
derable pins
• For TO-220, TO-218, TO-247
Heatsink
Part Number
RA-T2X-25E
RA-T2X-38E
RA-T2X-51E
RA-T2X-64E
FA-T220-25E
FA-T220-38E
FA-T220-51E
FA-T220-64E
Height
(in. ±.010 /
mm ±.25)
1.0/25.4
1.5/38.1
2.0/50.8
2.5/63.5
1.0 / 25.4
1.5 / 38.1
2.0 / 50.8
2.5 / 63.5
For
Package
Type
TO-220, -218, -247
TO-220, -218, -247
TO-220, -218, -247
TO-220, -218, -247
TO-220, -218, -247
TO-220, -218, -247
TO-220, -218, -247
TO-220, -218, -247
Ohmite
Surface
Thermal
Resistor
Area
Resistance*
Series
(mm
2
)
Weight (g) (°C/W)
TBH25,TCH35, TEH70, TEH100
8,901
25
4.8
TBH25,TCH35, TEH70, TEH100
12,983
38
3.9
TBH25,TCH35, TEH70, TEH100
17,065
51
3.5
TBH25,TCH35, TEH70, TEH100
21,148
63
3.1
TBH25,TCH35, TEH70, TEH100
9,285
18
4.7
TBH25,TCH35, TEH70, TEH100
13,756
27
3.8
TBH25,TCH35, TEH70, TEH100
18,222
37
3.4
TBH25,TCH35, TEH70, TEH100
22,814
46
3
*Natural convection
SPeCiFiCATiONS
Finish:
Black anodized
Material:
6063-T5 aluminum
Solder:
100% Tin (Sn)
PC board attachement:
0.091”
dia. pre-tinned pins.
O R D E R I N G I N F O R M AT I O N
Series
F or R
T2X = R Series
T220 = F Series
RoHS Compliant
S TA N D A R D pA RT N u M b E R S F O R F A N D R S E R I E S
Part Number
RA-T2X-25E
RA-T2X-38E
RA-T2X-51E
RA-T2X-64E
FA-T220-25E
FA-T220-38E
FA-T220-51E
FA-T220-64E
Description
Heat
Heat
Heat
Heat
Heat
Heat
Heat
Heat
sink
sink
sink
sink
sink
sink
sink
sink
for TO-220, TO-218, TO-247,
for TO-220, TO-218, TO-247,
for TO-220, TO-218, TO-247,
for TO-220, TO-218, TO-247,
for TO-220, TO-218, TO-247,
for TO-220, TO-218, TO-247,
for TO-220, TO-218, TO-247,
for TO-220, TO-218, TO-247,
Black Anodized
Black Anodized
Black Anodized
Black Anodized
Black Anodized
Black Anodized
Black Anodized
Black Anodized
Packaging
Bulk
Bulk
Bulk
Bulk
Bulk
Bulk
Bulk
Bulk
RA-T2X-25E
Finish
A = black anodized
V = degreased
Height
(mm)
HeAT DiSSiPATiON
R Series
100
90
80
Case Temp. Rise above
Ambient ( C)
70
60
50
40
30
20
10
0
0
2
4
6
8
10
12
14
Heat Dissipated (watts)
16
18
20
0
100
200
Air Velocity (ft./min.)
300
400
500
600
700
800
900 1000
5
Thermal Resistance from Mounting
Surface to Ambient ( C/watts)
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
F Series
100
90
80
Case Temp. Rise above
Ambient ( C)
70
60
50
40
30
20
10
0
0
2
4
0
100
200
Air Velocity (ft./min.)
300
400
500
600
700
800
900 1000
5
Thermal Resistance from Mounting
Surface to Ambient ( C/watts)
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
6
8
10
12
14
Heat Dissipated (watts)
16
18
20
H = 1"
H = 1.5"
H = 2"
H = 2.5"
H = 1"
H = 1.5"
H = 2"
H = 2.5"
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
1
OHMITE [ OHMITE MFG. CO. ]
