CTS
®
iZIF
™
HEAT FRAME
GENERAL DESCRIPTION
The iZIF
™
is a custom aluminum heat frame that integrates
the PCB retainer for improved structural integrity and thermal
efficiency (.8°C-in./W). The iZIF
™
is a highly reliable patent-
pending design for rugged military and aerospace circuit card
applications. It features a quarter-turn lock, uniform clamping
pressure, and can be sized to fit small daughter cards up to
9U VME. A bottom plate may also be added for additional
cooling and structural integrity. The iZIF
™
features a 1/8”
stainless steel socket head cap rod with beryllium copper
spring. A variety of finishes are available such as chemical
film, black anodize, and electroless nickel.
THERMAL LINKS
GENERAL DESCRIPTION
CTS’s thermal links provide superior retention because
of the 6 to 8-segment fingers versus the 2 or 3-segment
fingers available from other manufacturers. These thermal
links are offered for TO-5s, TO-8s and TO-18s with or
without BeO washer and other appropriate hardware.
They provide an effective retainer and efficient thermal
path between semiconductor and heat sinks or chassis.
There is excellent transistor retention under high
vibration and shock loads. The thermal links can be
inserted and removed multiple times without loss of
retention or damage to the finish over the entire JEDEC
case diameter range. They can be installed with a rivet or
eyelet, soldered to a PC pad or heat sink, mounted with a
single screw or with a threaded stud and hex nut.
FAN TOP SERIES
A
B
Fan Tops
“A”
Dim.
.25
.25
.25
.25
.36
.33
.12
.12
“B” Semiconductor
Dim.
Case Type
*Ø °C/W
.50
.50
.75
.75
1.25
1.25
1.25
1.25
TO-18
TO-18
TO-5
TO-5
TO-5
TO-8
TO-5
TO-8
150.0
150.0
81.1
81.1
57.7
41.0
56.6
56.6
Unplated
Part Number
Black Cadmium
Black Chem.
Material
BeCu
Brass
BeCu
Brass
Brass Fan
BeCu Retainer
Brass Fan
BeCu Retainer
Brass
Brass
TXBF-019-025U TXBF-019-025B
N.A.
TXCF-019-025U
N.A.
TXCF-019-025CB
TXBF-032-025U TXBF-032-025B
N.A.
TXCF-032-025U
N.A.
TXCF-032-025CB
TXBF2-032-036U TXBF2-032-036B
N.A.
TXBF2-050-033U TXBF2-050-033B
TXCF-125-1U
TXCF-125-2U
TXCF-125-1CB
TXCF-125-2B
N.A.
N.A.
N.A.
*Natural convection, case-ambient mounted on G10 board
18
CTS
THERMAL LINKS FOR TO-5, TO-8 AND TO-18 TRANSISTORS
Thermal Link Retainers Without BeO Insulators
Fig.
#
1
2
3
3
4
5
6
7
7
8
®
Part Number
Semiconductor
Case Type
Black Cadmium Finish Dull Nickel Finish
TO-18
TO-18
TO-18
TO-18
TO-18
TO-5
TO-5
TO-5
TO-5
TO-5
TXBE-019-021B
TXB2P-019-028B
TX1807B
TX1807-1B
TX1847B
TXBE-032-031B
TXB2P-032-037B
TX0507-1B
TX0507-2B
TX0547B
TXBE-019-021ND
TXB2P-019-028ND
TX1807ND
TX1807-1ND
TX1847ND
TXBE-032-031ND
TXB2P-032-037ND
TX0507-1ND
TX0507-2ND
TX0547ND
Mounting
Method
Rivet/Solder
2-56 Screw
4-40 Stud
6-32 Stud
2-56 Hex Nut
Rivet/Solder
4-40 Screw
6-32 Stud
10-32 Stud
14-40 Hex Nut
Dimensions are for reference use only. Contact CTS for
dimensions with tolerances or standard part drawings.
Thermal Link Retainers With BeO Insulators
Fig.
#
1
1
2
2
3
4
5
5
6
6
7
8
Part Number
Semiconductor
Case Type
Black Cadmium Finish Dull Nickel Finish
TO-18
TO-18**
TO-18
TO-18
TO-18
TO-18
TO-5
TO-5**
TO-5
TO-5
TO-5
TO-5
TXP1803B
TXP1808B
TX1806B
TX1806-1B
TX1822B
—
TXP0503B
TXP0508B
TX0506-1B
TX0506-2B
TX0522B
—
TXP1803ND
TXP1808ND
TX1806ND
TX1806-1ND
TX1822ND
TX1805-ND
TXP0503ND
TXP0508ND
TX0506-1ND
TX0506-2ND
TX0522ND
TX0505-ND
Mounting
Method
2-56 Screw
2-56 Screw
4-40 Stud
6-32 Stud
2-56 Hex Nut
Solder
4-40 Screw
4-40 Screw
6-32 Stud
10-32 Stud
4-40 Hex Nut
Solder
**BeO and thermal link are brazed together.
Dimensions are for reference use only. Contact CTS for
dimensions with tolerances or standard part drawings.
THERMAL LINKS FOR TO-8s
Thermal Link Retainers Without BeO Insulators
Part Number
Black Cadmium Finish Dull Nickel Finish
TXBE-045-028B
TXB2P-045-037B
TXBE-050-028B
TXB2P-050-037B
TXBE-055-028B
TXB2P-055-037B
Mounting
Method
Max. Weight
(Grams)
1.5
4.5
1.5
4.5
1.5
4.5
Case
Diameter
0.455
0.455
0.500
0.500
0.550
0.550
TXBE-050-028
TXB2P-050-037
TXBE-045-028ND Solder, Epoxy, Rivet
TXB2P-045-037ND
4-40 Screw
TXBE-050-028ND Solder, Epoxy, Rivet
TXB2P-050-037ND
4-40 Screw
TXBE-055-028ND Solder, Epoxy, Rivet
TXB2P-055-037ND
4-40 Screw
Screw and shouldered nylon washer for .060 chassis included;
If mounting hardware not desired, deleted “P” from part number.
Dimensions are for reference use only. Contact CTS for
dimensions with tolerances or standard part drawings.
19
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