Surface Mount DIP Switches
SERIES 78H
SPDT and DPST
FEATURES
• Compatible with SMT Assembly
Including Infrared Reflow and
Vapor-Phase
• Reliable Spring and Ball Contact
DIMENSIONS In inches (and millimeters)
SPDT, DPST, Top Actuated, Slide Operated
Recommended PC Pad Dimensions
LENGTH .0ꢀ0 (0,ꢁ5ꢂ
SEE ORDER INFO
.380 .0ꢀ0
(9,65 0,ꢁ5ꢂ
.0ꢁ5
(5,84ꢂ
REF.
.055 .0ꢀ0
(ꢀ,40 0,ꢁ5ꢂ
.530
(ꢀ3,46ꢂ
TꢃY.
.ꢁ80 (7,ꢀꢀꢂ
TꢃY.
.ꢁ68 .0ꢀ0
.0ꢁ5 (0,64ꢂ R.
(6,8ꢀ 0,ꢁ5ꢂ
.303 .0ꢀ5
(7,70 0,38ꢂ
.4ꢁ4 .0ꢀ5
(ꢀ0,77 0,38ꢂ TꢃY.
.ꢀ00 .005
(ꢁ,54 0,ꢀ3ꢂ TꢃY.
.ꢁ95 + .000 – .0ꢁ0
(7,49 – 0,5ꢀꢂ
.070 (ꢀ,78ꢂ TꢃY.
.ꢀ00 (ꢁ,54ꢂ TꢃY.
C
.0ꢀꢁ .00ꢀ
(0,30 0,03ꢂ
TꢃY.
C
L
L
C
C
L
L
CIRCUITRY
with all actuators in the closed (on) position as
shipped.
SPDT 2 Circuits (no common)
DPST
1
1
1
1
ON
ON
Materials and Finishes
Shor ting Member: Brass, gold-plated
over nickel barrier.
Dot indicates
active circuit.
OFF
ON
Base Contacts: Copper alloy, gold-plated
over nickel barrier.
Mechanical Shock: Per Method 213, Test
Condition A. 1 mS opening (10 mS allowed)
Terminal Strength: Per specification
Thermal Aging: 1,000 hours at 85°C; no
failures
Thermal Shock: Per specification; no failures;
passes contact resistance
SPECIFICATIONS
Electrical Ratings
Make-and-break Current Rating: 2,000
operations per switch position at 1 mA, 5 Vdc;
50 mA, 30 Vdc; or 150 mA, 30 Vdc
Contact Resistance: Initial: 30 mohms max.
After Life: 100 mohms max. (10 mA at 50 Vdc,
open circuit)
Insulation Resistance: Minimum, at 100 Vdc
between adjacent closed contacts and also
across open switch contacts. Initial: 2,000
Mohms; After Life: 1,000 Mohms
Terminals: Copper alloy, matte tin-plated over
nickel barrier.
Non-Conductive Parts: Cover is natural color
thermoplastic, actuators are white thermoplastic
(UL94V-O)
TAPE AND REEL PACKAGING
Meets requirements of EIA 481-2 or
EIA 481-3
Environmental Ratings
Meets all requirements of MIL- S-83504**. Where
Grayhill performance is superior, the MIL spec is
listed in parentheses.
13 INCH
DIAMETER REEL
Operating Temperature Range: -40°C to +
85°C
Storage Temperature Range: -55°C to + 85°C
Moisture Resistance: Per MIL-STD-202, Method
106
Dielectric Strength: Minimum voltage (AC, RMS)
measured between adjacent closed contacts
and also across open switch contacts. Initial:
750 volts; After Life: 500 volts
Current Carry Rating: 4 amps, maximum rise
of 20°C
CONDUCTIVE
PLASTIC EMBOSSED
TAPE
DIRECTION
OF FEED
Switch Capacitance: 2 pF at 1megahertz
Soldering Information
16 & 24mm
16mm
TAPE
Solderability: Per MIL-STD-202, Method 208
Soldering Heat Resistance: Per MIL-S-83504,
six second test
Mechanical Ratings
Mechanical Life: 2,000 operations per switch
position
Vibration Resistance: Per method 204, Test
Condition B. 1 mS opening (10 mS allowed)
1
1
1
Recommended Processing Temperature:
220°C–230°C (1 pass—260°C maximum)
Processing Position: Switch is to be processed
1
2
3
4
1
2
3
4
1
2
3
4
ORDERING INFORMATION: Tube Packaging
No. of
Length
Length
(metric)
Carrier Width
Part Number*
SPDT
16mm
32 & 44mm
TAPE
Positions
(inches)
Dim. A
DPST
PIN ONE LOCATION
COVER TAPE
1
2
3
4
0.280"
0.480"
0.680"
0.880"
7,1 mm
12,2 mm
17,3 mm
22,4 mm
24 mm
24 mm
32 mm
44 mm
78HJ01GWT
78HJ02GWT
78HJ03GWT
78HJ04GWT
78HF01GWT
78HF02GWT
78HF03GWT
78HF04GWT
DIM. A (SEE ORDER INFO.)
Each reel has a 15.750 inch (390 mm)
minimum leader and a 6.30 inch (160 mm)
minimum trailer.
* Insert "R" before the "T" in the Grayhill part number for tape and reel packaging (500 switches/reel).
** Note: 100% matte tin terminal plating does not meet MIL-S-83504 for lead content.
Available from your local Grayhill Distributor. For prices and discounts, contact a local Sales Office, an authorized local Distributor or Grayhill.
Grayhill, Inc.
• 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com