SURFACE MOUNT
MAGNETIC-LATCHING
TO-5 RELAYS
DPDT
SERIES
S422
SERIES
DESIGNATION
S422
S422D
S422DD
RELAY TYPE
DPDT Surface Mount Basic Relay
DPDT Surface Mount Relay with internal diode for coil transient suppression
DPDT Surface Mount Relay with internal diode for coil transient suppression
and polarity reversal protection
The Series S422D and S422DD utilize discrete diodes for
coil suppression and polarity reversal protection.
By virtue of its inherently low intercontact capacitance and contact
circuit losses, these TO-5 relays have proven to be excellent ultra-
miniature RF switches for frequency ranges well into the UHF spec-
trum. A typical RF application for these TO-5 relays is in
handheld radio receivers, wherein the combined features of good RF
performance, small size, very low coil power dissipation and high reli-
ability make it a preferred method of transmit-receive
switching (See Figure 1).
The Series S422 magnetic-latching relays are ideally suited for
applications where power dissipation must be minimized. The relays
can be operated with a short duration pulse. After the contacts have
transferred, no external holding power is required.
The magnetic latching feature of the Series S422 relays provide a
“memory” capability, since the relays will not reset upon removal of
coil power.
DESCRIPTION
The magnetic-latching TO-5 relay, originally conceived and de-
veloped by Teledyne, has become one of the industry standards
for low-level switching from dry circuit to 1 ampere. Designed for
high-density PC board surface mounting, its small size and low coil
power dissipation make the S422 relay one of the most versatile
ultraminiature relays available.
The following unique construction features and manufacturing
techniques provide excellent resistance to environmental extremes
and overall high reliability:
• All welded construction.
• Unique uni-frame design providing high magnetic ef¿ciency and
mechanical rigidity.
• High force/mass ratios for resistance to shock and vibration.
• Advanced cleaning techniques provide maximum assurance of
internal cleanliness.
• Precious metal alloy contact material with gold plating assures
excellent high current and dry circuit switching capabilities.
PRINCIPAL OF OPERATION
PERMANENT MAGNET
MAGNETIC CIRCUIT B
MAGNETIC CIRCUIT A
SOFT IRON FRAME
Energizing Coil B produces a magnetic ¿eld op-
+
+
posing the holding Àux of the permanent magnet in
COIL A
COIL B
Circuit B. As this net holding force decreases, the
SOFT IRON
SOFT IRON
COIL A
COIL B
attractive force in the air gap of Circuit A, which
-
-
AIR GAP
SOFT IRON
also results from the Àux of the permanent mag-
ARMATURE
STATIONARY
CONTACT
net, becomes great enough to break the armature
free of Core B, and snap it into a closed position
against Core A. The armature then remains in this
MOVING
CONTACT
position upon removal of power from Coil B, but
will snap back into position B upon energizing Coil
A. Since operation depends upon cancellation of a magnetic ¿eld, it is necessary to apply
the correct polarity to the relay coils as indicated on the relay schematic. When latching
relays are installed in equipment, the latch and reset coils should not be pulsed simulta-
neously. Coils should not be pulsed with less than rated coil voltage and the pulse width
should be a minimum of three times the speci¿ed operate time of the relay. If these condi-
tions are not followed, it is possible for the relay to be in the magnetic neutral position.
© 2008 Teledyne Relays
ENVIRONMENTAL AND
PHYSICAL SPECIFICATIONS
Temperature
(Ambient)
Vibration
(General Note 1)
Shock
(General Note 1)
Acceleration
Enclosure
Weight
–65°C to +125°C
30 g’s to 3000 Hz
100 g’s,
6msec, half sine
50 g’s
Hermetically sealed
0.10 oz. (2.84g) max.
S422 Page 1
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
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SERIES S422
GENERAL ELECTRICAL SPECIFICATIONS (-65 ºC to +125 ºC unless otherwise noted)(Notes 2 & 3)
Contact Arrangement
Rated Duty
Contact Resistance
Contact Load Rating (DC)
(See Fig. 2 for other DC resistive
voltage/current ratings)
Contact Load Rating (AC)
2 Form C (DPDT)
Continuous
0.125
max. before life; 0.225
max. after life at 1.0 A/28Vdc (measured 1/8” from header)
Resistive:
Inductive:
Lamp:
Low level:
Resistive:
1Amp/28Vdc
200 mA/28Vdc (320 mH)
100 mA/28Vdc
10 to 50 A, 10 to 50 mV
250 mA/115Vac, 60 Hz and 400 Hz (Case not grounded)
100 mA/115Vac, 60 Hz and 400 Hz (Case grounded)
Contact Life Ratings
Contact Overload Rating
Contact Carry Rating
Coil Operating Power
Operate Time
Contact Bounce
Minimum Operate Pulse
Intercontact Capacitance
Insulation Resistance
Dielectric Strength
Negative Coil Transient (Vdc)
Diode P.I.V. (Vdc)
10,000,000 cycles (typical) at low level
1,000,000 cycles (typical) at 0.5 A/28Vdc resistive
100,000 cycles min. at all other loads speci¿ed above
2A/28Vdc Resistive (100 cycles min.)
Contact Factory
290 mW typical @ nominal rated voltage @ 25 °C
S422/S422D:
S422DD:
2.0 msec max.
4.5 mS width @ rated voltage
0.4 pF typical
10,000 M
min. between mutually isolated terminals
70,000 ft.: 125 Vrms/60 Hz
1.0 max
100 min.
1.5 mS max. at nominal rated coil voltage
2.0 mS max. at nominal rated coil voltage
500 Vrms (60 Hz) @ atmospheric pressure;
S422D, S422DD
S422D, S422DD
DETAILED ELECTRICAL SPECIFICATIONS (-65 °C to +125 °C unless otherwise noted) (Note 3)
BASE PART NUMBERS
(See Note 10 for P/N example)
Coil Voltage, Nominal (Vdc)
Nom.
Max.
S422
S422D
S422DD
(Note 4)
Min.
Max.
S422
S422D
S422DD
S422-5
S422D-5
S422DD-5
5.0
6.0
61
48
75.8
104.2
3.5
4.5
S422-6
S422D-6
S422DD-6
6.0
8.0
120
97
46.9
63.0
4.5
5.5
S422-9
S422D-9
S422DD-9
9.0
12.0
280
280
26.0
33.7
6.8
7.8
S422-12
S422D-12
S422DD-12
12.0
16.0
500
500
20.0
25.5
9.0
10.0
S422-18
S422D-18
S422DD-18
18.0
24.0
1130
1130
13.7
17.2
13.5
14.5
S422-26
S422D-26
S422DD-26
26.5
32.0
2000
2000
11.6
14.4
18.0
19.0
Coil Resistance
(Ohms ±10% @ 25 °C)
Coil Current (mAdc @ 25 °C)
(S422DD Series only)
Set & Reset Voltage
(Vdc, Max.)
PERFORMANCE CURVES (NOTE 2)
TYPICAL RF PERFORMANCE
TYPICAL DC CONTACT RATING (RESISTIVE)
0
.1
.2
.3
.4
dB
INS
ERT
IO
NL
300
OSS
LOAD VOLTAGE (VDC)
250
200
150
100
50
10
20
30
40
50
60
70
.01
WR)
S (VS
N LOS
R
RETU
TS
TAC
CON
OSS
R
N AC
ATIO
ISOL
ES
S POL
CROS
ION A
T
ISOLA
1.92
1.22
1.02
1.01
1.00
1.00
1.0
VSWR
1.07
0.5
.1
.5
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
FREQUENCY (GHz)
LOAD CURRENT (AMPS DC)
FIGURE 1
© 2008 Teledyne Relays
FIGURE 2
S422 Page 2
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
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SERIES S422
OUTLINE DIMENSIONS
0.400 MIN. 5 PL.
0.200 MIN. 5 PL.
0.100
0.100 TYP.
0.065
0.045
CHAMFER 5X5
TYP. 4 PL.
PAD DETAILS
36º ± 1º TYP.
RECOMMENDED PAD LAYOUT
See Notes 5 and 6
DIMENSIONS ARE SHOWN IN INCHES (MILIMETERS)
GENERAL NOTES
1. Relay contacts will exhibit no chatter in excess of 10 sec or transfer in excess of 1 sec.
2. “Typical” characteristics are based on available data and are best estimates. No on-going verification tests are performed.
3. Unless otherwise specified, parameters are initial values.
4. For reference only. Coil resistance not directly measurable at relay terminals due to internal series diode. S422DD only.
5. Recommended solder paste thickness: 0.01”
6. Leads will fit pad layout shown with no overhang.
7. Unless otherwise specified, relays will be supplied with solder-coated leads.
8. The slash and characters appearing after the slash are not marked on the relay.
9. Screened HI-REL versions available. Contact Factory.
10.
Teledyne Part Numbering System for Standard TO-5 and Centigrid Surface Mount Relays
S422
D
- 26
/
G
G = Gold-Plated Leads (RoHS Compliant)
* Surface Mount Relays are Solder-Coated by default
(Notes 7 & 8)
Relay Series
D = Suppression Diode
DD = Suppression Diode and Polarity
Protection
Coil Voltage
11. Add "/R" to end of part number for RoHS compliant solder coated pins (Sn99.3/Cu0.7).
© 2008 Teledyne Relays
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
(800) 284-7007 • www.teledynerelays.com • +44 (0) 1236 453124 • www.teledyne-europe.com
S422 Page 3
Appendix A: Spacer Pads
Pad designation and
bottom view dimensions
Ø.150
[3.81]
(REF)
Height
For use with the following:
ER411T
ER412, ER412D, ER412DD
712, 712D, 712TN,
RF300, RF310, RF320
ER420, ER422D, ER420DD, 421,
ER421D, ER421DD, ER422, ER422D,
ER422DD, 722, 722D, RF341
ER431T, ER432T,
ER432, ER432D, ER432DD
732, 732D, 732TN, RF303, RF313,
RF323
RF312
ER411, ER411D, ER411DD
Dim. H
Max.
.295 (7.49)
.300 (7.62)
.305 (7.75)
.400 (10.16)
.410 (10.41)
.350 (8.89)
.295 (7.49)
.400 (10.16)
.300 (7.62)
.410 (10.41)
.305 (7.75)
.300 (7.62)
Dim
H
MAX
“M4” Pad for TO-5
Dim
H
MAX
ER431, ER431D, ER431DD
RF311
“M4” Pad for TO-5
RF331
172, 172D
Dim
H
MAX
ER114, ER114D, ER114DD,
J114, J114D, J114DD
ER134, ER134D, ER134DD,
J134, J134D, J134DD
RF100
.400 (10.16)
.315 (8.00)
.420 (10.67)
.320 (8.13)
.300 (7.62)
.400 (10.16)
.325 (8.25)
.305 (7.75)
“M4” Pad for Centigrid
®
.156
[3.96]
(REF)
RF103
122C, A152
Dim
H
MAX
ER116C, J116C
ER136C, J136C
RF180
.256
[6.5]
(REF)
“M9” Pad for Centigrid
®
A150
Notes:
1. Spacer pad material: Polyester film.
2. To specify an “M4” or “M9” spacer pad, refer to the mounting variants portion of the part numbering
example in the applicable datasheet.
3. Dimensions are in inches (mm).
4. Unless otherwise specified, tolerance is ± .010 (.25).
5. Add 10 mΩ to the contact resistance shown in the datasheet.
6. Add 0.01 oz. (0.25 g) to the weight of the relay assembly shown in the datasheet.
© 2008 Teledyne Relays
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Page 15
Appendix A: Spreader Pads
Pad designation and
bottom view dimensions
.370 [9.4]
MAX SQ
.100
[2.54]
Height
For use with the following:
ER411T, J411T, ER412, ER412D
ER412DD, J412, J412D, J412DD
ER412T, J412T
712, 712D, 712TN
ER431T, J431T, ER432, ER432D
ER432DD, J432, J432D, J432DD
ER432T, J432T
732, 732D, 732TN
ER420, J420, ER420D, J420D
ER420DD, J420DD, ER421, J421
ER421D, J421D, ER421DD
J422D, ER422DD, J422DD, 722
ER411T
ER412, ER412D, ER412DD
J412, J412D, J412DD
Dim. H
Max.
.388 (9.86)
.393 (9.99)
.493 (12.52)
.503 (12.78)
.398 (10.11)
Dim
H
MAX
.150
[3.81]
.014
[0.36]
(REF)
.300
[7.62]
.100
[2.54]
.200
[5.08]
.370
[9.4]
MIN
"M" Pad
5/ 6/
.390 [9.91]
SQ
.100
[2.54]
.441 (11.20)
.451 (11.46)
.451 (11.46)
.546 (13.87)
.556 (14.12)
.100
[2.54]
.150
[3.81]
.300
[7.62]
Dim
H
MAX
.150
[3.81]
.300
[7.62]
.130
[3.3]
712, 712D
ER421, ER421D, ER421DD
722, 732D
ER431T
ER432, ER432D, ER432DD
732, 732D
ER411, ER411D, ER411DD
ER411TX
ER412X, ER412DX, ER412DDX
ER412TX
712X, 712DX, 712TNX
ER420X, ER420DX, ER420DDX
ER421X, ER421DX, ER421DDX
ER422X, ER422DX
ER422DDX, 722X, 722DDX
ER431, ER431D, ER431DD
ER431TX
ER432X, ER432DX, ER432DDX
ER432TX
732X, 732DX, 732TNX
"M2" Pad
7/ 8/
.370 [9.4]
MAX SQ
.100
[2.54]
.388 (9.86)
.393 (9.99)
.398 (10.11)
Dim
H
MAX
.150
[3.81]
.014
[0.36]
(REF)
.300
[7.62]
.100
[2.54]
.200
[5.08]
.370
[9.4]
MIN
.493 (12.52)
.503 (12.78)
"M3" Pad
5/ 6/ 9/
Notes:
1. Spreader pad material: Diallyl Phthalate.
2. To specify an “M”, “M2” or “M3” spreader pad, refer to the mounting variants portion of the part number example
in the applicable datasheet.
3. Dimensions are in inches (mm).
4. Unless otherwise specified, tolerance is ± .010” (0.25).
5/. Add 25 mΩ to the contact resistance shown in the datasheet.
6/. Add .01 oz. (0.25 g) to the weight of the relay assembly shown in the datasheet.
7/. Add 50 mΩ to the contact resistance shown in the datasheet.
8/. Add 0.025 oz (0.71 g) to the weight of the relay assembly shown in the datasheet.
9/. M3 pad to be used only when the relay has a center pin (e.g. ER411M3-12A, 722XM3-26.)
Page 16
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© 2008 Teledyne Relays
