SURFACE MOUNT,
MAGNETIC-LATCHING
BROADBAND
RF RELAYS
DPDT
DESCRIPTION
The Series GRF342 relay is a hermetically sealed,
ultraminiature RF relay designed from inception for surface
mount applications. This magnetic-latching relay features
extremely low internal circuit losses for exceptional time and
frequency domain response characteristics through and
beyond the UHF spectrum and into the S band. The GRF342
features a unique ground shield that isolates and shields
each lead to ensure excellent contact-to-contact and pole-to-
pole isolation. This ground shield provides an RF ground
interface that results in improved high-frequency
performance as well as parametric repeatability. The
GRF342 extends performance advantages over similar RF
devices that simply offer formed leads for surface mounting.
The GRF342 is robust to shock, vibration and temperature
extremes for use in space applications and other demanding
environments. It is engineered for use in RF attenuators, RF
SERIES
GRF342
switch matrices, automated test equipment, spacecraft and
other applications that require dependable high-frequency
signal fidelity and performance. Its low profile makes the
GRF342 ideal for applications where extreme packaging
density and/or close PC board spacing are required.
Unique features and manufacturing techniques include:
• Positive mounting means to RF ground plane.
• Unique uniframe design provides high magnetic efficiency
and mechanical rigidity.
• High force/mass ratios for resistance to shock and
vibration.
• Advanced cleaning techniques provide maximum
assurance of internal cleanliness.
• Gold-plated precious metal alloy contacts ensure reliable
dc and RF signal switching, as well as low and stable
insertion loss.
• Robust to high temperature solder reflow environments.
PRINCIPLE OF OPERATION
Energizing Coil B produces a
MAGNETIC CIRCUIT B
SOFT IRON FRAME
magnetic field opposing the
magnetic
field
of
the
+
+
permanent magnet in Circuit
COIL A
COIL B
B. As the net holding force
SOFT IRON
SOFT IRON
decreases, the attractive force
COIL A
COIL B
-
-
in the air gap of Circuit A,
AIR GAP
SOFT IRON
ARMATURE
which also results from the
STATIONARY
CONTACT
magnetic
field
of
the
permanent magnet, becomes
great enough to break the
MOVING
armature free of Core B, and
CONTACT
snap it into a closed position against Core A. The armature remains in this
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 field, 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 simultaneously. Coils should not be pulsed with less
than rated coil voltage and the pulse width should be a minimum of three
times the specified operate time of the relay. If these conditions are not
followed, it is possible for the relay to be in the magnetic neutral position.
PERMANENT MAGNET
MAGNETIC CIRCUIT A
ENVIRONMENTAL AND
PHYSICAL SPECIFICATIONS
Temperature
(Ambient)
Vibration
Shock
Enclosure
Weight
–55°C to +85°C
10 g’s to 1000 Hz (Note 1)
30 g’s for 6 msec (Note 1)
half-sine
Hermetically sealed
0.1 oz. (2.9g) max.
GRF342 Page 1
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
www.teledynerelays.com
©2003 TELEDYNE RELAYS
GRF342/0703/Q1
SERIES GRF342
TYPICAL RF CHARACTERISTICS
(See RF Notes)
Isolation Across Contacts (RF Note 4)
-25
-25
-30
-30
-35
Isolation Pole to Pole (RF Note 5)
Isolation (dB)
Isolation (dB)
-35
-40
-45
-50
-55
-40
-45
-50
-60
-65
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
-55
Frequency (MHz)
Frequency (MHz)
Insertion Loss (RF Note 6)
-0.1
2.2
2.0
1.8
-0.5
VSWR
VSWR (RF Note 6)
-0.3
Insertion Loss (dB)
1.6
1.4
-0.7
-0.9
1.2
-1.1
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
1.0
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
Frequency (MHz)
Frequency (MHz)
GRF342 Time Response (RF Note 6)
1.1
0.9
90%
0.7
37ps reference
Volt
0.5
0.3
0.1
-0.1
-100
61ps propagation delay time
52.5ps pulse rise time
10%
0
100
200
300
400
500
600
700
800
900
Time (ps)
RF NOTES
1. Test conditions:
a.
Fixture: .031" copper clad, reinforced PTFE, RT/duroid
®
6002 with SMA connectors. (RT/duroid
®
is a
registered trademark of Rogers Corporation.)
b.
RF ground shield is soldered to PCB RF ground plane.
c.
Room ambient temperature.
d.
Terminals not tested were terminated with 50-ohm load.
e.
Contact signal level: –10 dBm.
f.
No. of test samples: 2.
Data presented herein represents typical characteristics and is not intended for use as specification limits.
Data is per pole, except for pole-to-pole data.
Data is the average from readings taken on all open contacts.
Data is the average from readings taken on poles with coil energized and de-energized.
Data is the average from readings taken on all closed contacts.
Test fixture effect de-embedded from frequency and time response data.
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
www.teledynerelays.com
GRF342 Page 2
GRF342/0703/Q1
2.
3.
4.
5.
6.
7.
©2003 TELEDYNE RELAYS
SERIES GRF342
GENERAL ELECTRICAL SPECIFICATIONS
Contact Arrangement
Rated Duty
Contact Resistance
Contact Load Ratings (DC)
Contact Life Ratings
Coil Operating Power
Operate Time
Minimum Operate Pulse
Intercontact Capacitance
Insulation Resistance
Dielectric Strength
2 Form C (DPDT)
Continuous
0.15 ohm initial
Resistive:
Low Level:
(@25°C) (General Note 2)
1 Amp/28Vdc
10 to 50 µA/10 to 50mV
10,000,000 cycles (typical) at low level
100,000 cycles min. at all other loads specified above
GRF342-5: 410mW typical at nominal rated voltage
GRF342-12: 288mW typical at nominal rated voltage
2.0 ms max at nominal rated coil voltage
6.0 ms @ rated voltage
0.4 pf typical
1,000 megohms min. between mutually isolated terminals
Atmospheric pressure: 350 Vrms/60Hz
(@25°C) (General Note 2)
GRF342-5
5.0
6.0
61
3.5
GRF342-12
12.0
16.0
500
9.0
DETAILED ELECTRICAL SPECIFICATIONS
BASE PART
NUMBERS
Nom.
Max.
Coil Resistance (Ohms ±20% @25°C) (Note 4)
Set & Reset Voltage (Vdc, Max.) Pulse Operated
Coil Voltage, Nominal (Vdc)
GENERAL NOTES
1. Relays will exhibit no contact chatter in
excess of 10 µsec or transfer in excess
of 1 µsec.
2. Unless otherwise specified, parameters
are initial values.
3. For extended contact life ratings,
contact factory.
4. Contacts shown in position resulting
when Coil A last energized.
5. Relays may be subjected to 260°C,
peak solder reflow temperature, 1
minute, 3 passes.
6. Butt-lead ends are coplanar within
.003" (0.08).
7. Application notes available for PCB
layout and mounting information.
OUTLINE DIMENSIONS
.335 MAX
(8.51)
.320 MAX
(8.13)
.035 REF
(.89)
Ø.375 MAX
(9.53)
10 LEADS
LENGTH
.033 (0.84) REF
DIA.
.017
(0.43)
.031 (.79)
REF
.035 (.89)
REF
COIL B
+.002
-.001
+0.05
-0.03
– 10
9+
8
7
36° ±3° TYP
.200 ±.010
(5.08 ±0.25)
DIA.
6
5
–
+4
1
2
3
COIL A
RF GROUND SHIELD
SEE NOTE 2
SCHEMATIC - TERMINAL VIEW
(SHOWN: COIL A LAST ENERGIZED CONDITION)
PIN NUMBERS ARE FOR REFERENCE ONLY,
NOT MARKED ON RELAY
NOTES:
1. DIMENSIONS ARE IN INCHES. METRIC EQUIVALENTS IN MILLIMETERS ARE SHOWN IN ( ).
2. FOR BEST RF PERFORMANCE, SOLDER BOTTOM OF RF GROUND SHIELD TO PCB RF GROUND PLANE.
GRF342 Page 3
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
www.teledynerelays.com
©2003 TELEDYNE RELAYS
GRF342/0703/Q1
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 ¿lm.
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 speci¿ed, tolerance is ± .010 (.25).
5. Add 10 m to the contact resistance show 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
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 speci¿ed, tolerance is ± .010” (0.25).
5/. Add 25 m 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 m 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.)
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