FRONT (Page 1) - Fusite

®
TECH-DATA
Glass-to-metal hermetic seals
and power terminal
feed-throughs
■ Fusite custom glass
■ Patented conductor
pin features
■ Heavy-duty ceramic
for oversurface
■ Nickel-plated steel
terminal body
■ Silicone rubber
oversurface
BULLETIN 962A

Glass-to-metal
hermetic seals
and power
terminal
feed-throughs
Terminal Models
Fractional, 600
and 700 Series
These Fusite terminals are
designed for high reliability Air
Conditioning and Refrigeration
Compressors. Many incorporate
industry’s most innovative engineering
features, including:
■ Patented groove is designed to
open at high in-rush currents.
(This design is not a substitute
for compressor safety devices
and circuit protection.)
■ Custom-smelted Fusite proprietory
glass designed for complete and
reliable hermeticity.
■ Heavy-duty ceramic insulator for
electrical oversurface on the
inside of the compressor.
■ Molded silicone rubber oversurface
for the outside of the compressor,
bonded to the terminal.
■ Solid pin and high conductivity
copper core pin models available
for various applications.
Minimum Ratings
Hydrostatic
Pressure: .................... UL - 2250 psi
Hermeticity: ................1 x 10 (-7) Std.
CC/Sec. of Helium
Dielectric Voltage: ......Min. 2500V with
10,000 Megohms
at 500VDC
© 1996 Fusite Division of Emerson Electric Co.
Fusite is a registered trademark of Emerson Electric Co.
®
PART # A B C
393-37 .344 [8.74] .547 [13.89] 1.281 [32.54]
393-38 .266 [6.76] .406 [10.31] 1.062 [26.97]
393-95 .266 [6.76] .547 [13.89] 1.203 [30.56]
TERMINALS - 393 FRACTIONAL SERIES
PART # A B
393-694 .452 [11.48] 1.510 [38.36]
393-677 .530 [13.46] 1.590 [40.39]
TERMINALS - 393-600 SERIES
TERMINALS - 393-700 SERIES
Nonagon
pad available
on 393-600
and 393-700
Copper Core
Models
footnoted 4.
Nonagon
pad available
on 393-600
and 393-700
Copper Core
Models
footnoted 4.
PART # A B
3B3-635 .765 [19.43] 1.700 [43.18]
3B3-637 .875 [22.23] 1.810 [45.97]
TERMINALS - 3B3-600 SERIES
TERMINALS - 3K3-600 SERIES
0.459
0.125 [3.18]
0.059 [1.50]
[11.66]
1.282 [32.56]
0.059 [1.50]
0.469
[11.66]
0.937 [23.80]
MAX.
AROUND
INSULATORS
A
B
0.125 [3.18]
0.459
[11.66]
0.937 [23.80]
0.125 [3.18]
45˚
0.390 [9.91]
0.250 [6.35]
90˚
A
1.282 [32.56]
45 ˚
1.282 [32.56]
B
C
1.510 [38.36]
0.391 [9.93]
0.250 [6.35]
1.112 [28.24]
0.090 [2.29]
0.238 [6.05]
1.112 [28.24]
0.260 [6.60]
0.670 REF. [17.02]
0.059 [1.50] 0.250 [6.35]
MAX.
AROUND
INSULATORS
45 ˚
0.059 [1.50]
45˚ 1.480 [37.59]
0.452
[11.48]
0.391 [9.93]
0.670
REF.
0.391 [9.93]
0.250 [6.35]
0.238 [6.05]
[13.46]
1.112 [28.24]
0.260 [6.60]
[17.02]
1.312 [33.32]
0.272 [6.91]
J P
90
[13.46]
˚
F
U
R
T
S I E
0.530
PAT' D
C
PAT'D
C
FU S
R
C
I T E
0.530
0.5954
[15.123]
1.100 [27.94]
MAX.
AROUND
INSULATORS
0.530
[13.46]
B
A
0.421 [10.69]
[17.45] 0.687
0.085 [2.16]
0.125 [3.18] 45°
0.7057
[17.925]
1.920 [48.77]
0.505
[12.83]
1.820 [46.23]
0.500 [12.70]
0.280 [7.11] 1.700 [43.18]
0.812
REF.
0.280 [7.11]
0.405 [10.29]
[20.70]
[20.62]
Note: Dimensions shown are in inches with millimeter dimensions in parentheses.
Ceramic Steel
Glass Rubber
90
˚
PAT ' D
C
0.815
Drawings are representative of Fusite models.
All data is subject to change. Consult latest
Fusite engineering drawings for current
specifications.
PAT' D
C
R
F US I
F US
F U S
T E
R
I T E
0.530
U R
R
I T E
U R
U R
U R
[13.46]

Model 1
Pin
Material
400 Series
SS
393-794 Solid Pins Pins 35 1.510 (38.36)
For over
393-774 Cu Core 4 Pins Pins 2000 VA & 50 3/8 (9.5) 3/16 (4.8) 1/4 (6.4) 1/8 (3.2) .125 (3.18) 1.510 (38.36)
up to 300 V
393-798 Cu Core 4 Pins Tabs 50 1.510 (38.36)
1 Models listed are representative models.
2 Terminals are recognized by Underwriters Laboratories File SA3716 -
Per UL Standard 984
3 Maximum Operating Current values were established under laboratory
conditions and serve as guidelines only. Individual applications must be
tested to determine the effect of specific variables. Tests were conducted
using standard gauge wire and high conductivity connectors, rated for their
applications. It is very important to use the proper wire size for a given
compressor operating current. Wire size and connector type greatly influence
the pin temperature, especially in over-current conditions.
4 These terminals are available with nonagon pads (shown at left).
Terminations
Outside Inside
UL Rating
2
Maximum
Operating
Current
Amps 3
Minimum Spacing Inches (mm)
Oversurface Through Air
Outside Inside Outside Inside
Pin Dia.
Inches (mm)
Pin Length
Inches (mm)
393-38 Solid Pins Pins For up to 20 1.062 (26.97)
2000 VA &
393-95 Solid Tabs Pins up to 300 V, 22 1/8 (3.2) 3/32 (2.4) 1/8 (3.2) 1/16 (1.6) .090 (2.29) 1.203 (30.56)
and for over
393-37 Solid Tabs Tabs 2000 VA 25 1.281 (32.54)
& up to
150V
393-677 Cu Core 4 Tabs Pins 50 1.590 (40.39)
For over
393-694 Solid Tabs Pins 2000 VA & 35 1.510 (38.36)
up to 300 V
393-674 Cu Core 4 Tabs Pins 50 3/8 (9.5) 3/16 (4.8) 1/4 (6.4) 1/8 (3.2) .125 (3.18) 1.510 (38.36)
393-698 Cu Core 4 Tabs Tabs 50 1.510 (38.36)
3B3-640 Solid Tabs Pins 35 1.810 (45.97)
3B3-637 Cu Core Tabs Pins 55 1.810 (45.97)
For over
3B3-634T Solid Tabs Tabs 2000 VA 35 1.810 (45.97)
& up to
3B3-619 Cu Core Tabs Tabs 600 V 55 1/2 (12.7) 1/4 (6.4) 3/8 (9.5) 3/16 (4.8) .125 (3.18) 1.810 (45.97)
3B3-635 Cu Core Straps Pins 65 1.700 (43.18)
3B3-620 Cu Core Straps Tabs 60 1.700 (43.18)
3K3-602 Cu Core Double Pins 80 .187 (4.75) 1.820 (46.23)
Straps
For over
3K3-601 Cu Core Double Double 2000 VA 125 1/2 (12.7) 1/4 (6.4) 3/8 (9.5) 3/16 (4.8) .187 (4.75) 1.820 (46.23)
Straps Tabs & up to
600V
3K3H-600 Cu Core Double Double 130 .243 (6.17) 1.820 (46.23)
Straps Tabs
0.062 [1.57]
0.312 [7.92]
0.160 [4.06]
TAB DETAIL STRAP DETAIL
0.656 [16.66]
ø0.065/0.080 [1.65/2.03]
0.344 [8.74]
0.040 [1.02] x 45˚
0.250 [6.35]
0.307 [7.80] MIN.
0.032 [0.81]
0.104 [2.64]
0.218 [5.54]
0.437 [11.10]
0.030 [0.76]

Installation,Operation and Shipping
1. Excessive shocks to the terminal
must be avoided since mechanical
stress can damage the glass and/or
ceramic. Damage may result in hermetic
failure or loss of terminal performance.
2. Precautions are required to prevent
striking or bending of pins. Bent or
damaged pins may result in loss of
hermeticity or terminal performance.
3. Terminals must not be overheated
during brazing or welding operations.
The temperature of the metal adjacent
to the glass must not exceed 400°F.
4. It is important to select the proper
terminal for each application. Considerations
include maximum operating
currents, locked rotor currents,
time and protection circuitry. Since
customer designs vary as to terminal
location, lead size, return line locations
and compressor types, Fusite
cannot provide specific data on every
compressor configuration. The
attached data tables are general
guidelines only and not specific
application recommendations. For
assistance in terminal selection, contact
Fusite Engineering.
Bulletin 962A
Hermetic Terminal Precautions
5. Compressors and systems should
be designed with appropriate electrical
overload and thermal overload protection.
Locked rotor currents often run 5
times as high as operating currents,
and in some cases even higher. If
such high currents are allowed to continue
for any length of time, severe
damage or personal injury may result.
High currents raise the terminal pin
temperatures, which may result in failure
of wire insulation, breakdown of
coolant-oil mixture causing possible
electrical contamination, or softening
of the glass seal resulting in hermetic
failure.
6. Lead size and connector configuration
can effect terminal operating
temperature. Using larger wires
increases the heat sink effect and lowers
pin temperatures. Proper connector
selection also reduces contact
resistance and lowers pin temperatures.
General Instructions
Improper handling or servicing may
cause hermetic terminal failure. The
glass seal of the terminal may be
damaged and allow leakage of oil and
Where Glass Seals Metal
®
FUSITE DIVISION
EMERSON ELECTRIC CO.
6000 FERNVIEW AVENUE
CINCINNATI, OHIO 45212 U.S.A.
Telephone 513-731-2020 • Fax 513-631-6456
International Locations: GOTEMBA, JAPAN •
ALMELO, HOLLAND • BAO’AN, CHINA
refrigerant. If electrical power is
applied under these conditions, a hazardous
condition can be initiated and
may result in serious personal injury
and/or property damage.
To protect against this potential hazard,
personnel should be advised of
these conditions and take the following
precautions:
1. Always refer to compressor manufacturer’s
installation, operating and
service instructions.
2. Fusite terminals are not field serviceable
or repairable. Replace compressor
if required.
3. Do not remove the junction box
cover until electrical power to the unit
has been turned off.
4. Do not start the compressor without
the junction box cover properly locked
in place.
To protect further against compressor
failure hazards, consult factory technical
manuals. In addition, consult and
follow all manufacturers’ warning
labels mounted adjacent to the compressor
junction box. Contact Fusite
for other information regarding
Terminal Precautions.
All sales are subject to Fusite’s Terms & Conditions in effect at the time of shipment. A copy will be provided upon request.
Printed in U.S.A.