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Grayhill, Inc. 561 Hillgrove Avenue LaGrange, Illinois 60525-5997 USA Phone: 708-354-1040 Fax: 708-354-2820 www.grayhill.com
Surface Mount DIP Switches
DIP
Switches
SERIES 78H
SPDT and DPST
FEATURES
Compatible with SMT Assembly
Including Infrared Reflow and
Vapor-Phase
Reliable Spring and Ball Contact
SPECIFICATIONS
Electrical Ratings
Make-and-break Current Rating: 10,000
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
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
Switch Capacitance: 2 pF at 1megahertz
Mechanical Ratings
Mechanical Life: 20,000 operations per switch
position
Vibration Resistance: Per method 204, Test
Condition B. 1 mS opening (10 mS allowed)
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
Environmental Ratings
Meets all requirements of MIL- S-83504. Where
Grayhill performance is superior, the MIL spec is
listed in parentheses.
Operating Temperature Range: -40°C to + 85°C
Storage Temperature Range: -55°C to + 85°C
Moisture Resistance: Per specification, Method
106
Soldering Information
Solderability: Per MIL-STD-202, Method 208
Soldering Heat Resistance: Per MIL-S-83504,
six second test
Recommended Processing Temperature:
220°C–230°C (1 pass—260°C maximum)
Processing Position: Switch is to be processed
with all actuators in the closed (on) position as
shipped.
Materials and Finishes
Shorting Member: Brass, gold-plated
over nickel barrier.
Base Contacts: Copper alloy, gold-plated
over nickel barrier.
Terminals: Copper alloy, solder-plated over
nickel barrier.
Non-Conductive Parts: Cover is natural color
thermoplastic, actuators are white thermoplastic
(UL94V-O)
1
Dot indicates
active circuit.
11
ON
OFF
ON
CIRCUITRY
SPDT 2 Circuits (no common)
DPST
No. of
Length
Carrier Width
Part Number*
Positions
(inches)
(metric)
Dim. A
SPDT
DPST
1
0.280"
7,1 mm
24 mm
78HJ01GW
78HF01GW
2
0.480"
12,2 mm
24 mm
78HJ02GW
78HF02GW
3
0.680"
17,3 mm
32 mm
78HJ03GW
78HF03GW
4
0.880"
22,4 mm
44 mm
78HJ04GW
78HF04GW
5
1.080"
27,4 mm
44 mm
78HJ05GW
78HF05GW
* Add "R" to the Grayhill part number for tape and reel packaging (500 switches/reel).
ORDERING INFORMATION: Tube Packaging
Available from your local Grayhill Distributor. For prices and discounts, contact a local Sales
Office, an authorized local Distributor or Grayhill.
DIMENSIONS In inches (and millimeters)
SPDT, DPST, Top Actuated, Slide Operated
Recommended PC Pad Dimensions
.380 ± .010
(9,65 ± 0,25)
LENGTH ± .010 (0,25)
SEE ORDER INFO
.303 ± .015
(7,70 ± 0,38)
.424 ± .015
(10,77 ± 0,38) TYP.
.023
(5,84)
REF.
.012 ± .001
(0,30 ± 0,03)
TYP.
.055 ± .010
(1,40 ± 0,25)
.025 (0,64) R.
.100 ± .005
(2,54 ± 0,13) TYP.
C
L
C
L
.268 ± .010
(6,81 ± 0,25)
.530
(13,46)
TYP.
.280 (7,11)
TYP.
C
L
C
L
.070 (1,78) TYP.
.100 (2,54) TYP.
.295 + .000 – .020
(7,49 – 0,51)
TAPE AND REEL PACKAGING
1
4
3
2
1
4
3
2
1
4
3
2
4
2
3
4
2
3
4
1
13 INCH
DIAMETER REEL
COVER TAPE
DIM. A (SEE ORDER INFO.)
1
2
3
4
1
2
3
4
1
2
3
4
1
PIN ONE LOCATION
16 & 24mm
TAPE
16mm
32 & 44mm
TAPE
DIRECTION
OF FEED
CONDUCTIVE
PLASTIC EMBOSSED
TAPE
Meets requirements of EIA 481-2 or
EIA 481-3
Each reel has a 15.750 inch (390 mm)
minimum leader and a 6.30 inch (160 mm)
minimum trailer.
B-7