Series SRF300/SRF303
DPDT Non-Latching Electromechanical Relay
Signal Integrity up to 18Gbps
SURFACE MOUNT
HIGH REPEATABILITY,
BROADBAND TO-5 RELAYS
DPDT
SERIES
RELAY TYPE
SRF300
SRF300D
SRF300DD
SRF303
SRF303D
SRF303DD
Repeatable, RF relay
Repeatable, RF relay with internal diode for coil transient suppression
Repeatable, RF relay with internal diodes for coil transient suppression and polarity reversal
protection
Sensitive, repeatable, RF relay
Sensitive, repeatable, RF relay with internal diode for coil transient suppression
Sensitive, repeatable, RF relay with internal diodes for coil transient suppression and polarity
reversal protection
extremes and overall high reliability:
• Uniframe motor design provides high magnetic efficiency
and mechanical rigidity
• Minimum mass components and welded construction
provide maximum resistance to shock and vibration
• Advanced cleaning techniques provide maximum
assurance of internal cleanliness
• Hermetically sealed
• Solder Dipped Leads, (RoHS compliant solder option
available)
The Series SRF300D/SRF303D and SRF300DD/SRF303DD
relays have internal discrete silicon diodes for coil suppression
and polarity reversal protection. This hybrid package reduces
required PC board floor space byreducing the number of
external components needed to drive the relay.
DESCRIPTION
The ultraminiature SRF300 and SRF303 relays are designed
to provide a practical surface-mount solution with improved RF
signal repeatability over the frequency range. These relays are
engineered for use in RF attenuator, RF switch matrices, ATE
and other applications that require dependable high frequency
signal fidelity and performance.
The SRF300 and SRF303 feature:
• High repeatability
• Broader bandwidth
• Metal enclosure for EMI shielding
• High isolation between control and signal paths
• High resistance to ESD
The following unique construction features and manufacturing
techniques provide excellent robustness to environmental
ENVIRONMENTAL AND
PHYSICAL SPECIFICATIONS
Temperature
(Ambient)
Storage
Operating
–65°C to +125°C
–55°C to +85°C
INTERNAL CONSTRUCTION
Vibration
(General Note I)
Shock
(General Note I)
Enclosure
Weight
SRF300
SRF303
UNIFRAME
10 g’s to 500 Hz
30 g’s,
6ms half sine
Hermetically sealed
0.09 oz. (2.55g) max.
0.16 oz. (4.5g) max.
ARMATURE
UPPER
STATIONARY
CONTACT
MOVING
CONTACT
LOWER
STATIONARY
CONTACT
© 2010 TELEDYNE RELAYS
(800) 284-7007 • www.teledynerelays.com
SRF300/SRF303 Page 1
SRF300SRF303\102012\Q3
Series SRF300/SRF303
DPDT Non-Latching Electromechanical Relay
Signal Integrity up to 18Gbps
SERIES SRF300/SRF303
TYPICAL RF CHARACTERISTICS (See RF Notes)
SRF300YZ Isolation Across Contacts (RF Note 4)
0
0
SRF300YZ Pole-Pole Isolation (RF Note 5)
-10
-10
-20
-20
P-P Isolatlon(dB)
Isolation(dB)
-30
-30
-40
De-Energized
Energized
-40
P1NC
P1NO
-50
-50
-60
-60
0
1
2
3
Frequency(GHz)
4
5
6
-70
0
1
2
3
Frequency(GHz)
4
5
6
SRF300YZ Insertion Loss (RF Note 6)
4.5
0
4
-2
3.5
-4
3
SRF300YZ VSWR (RF Note 6)
Insertion Loss(dB)
-6
VSWR
2.5
P1NC
P1NO
P1NC
P1NO
-8
2
-10
1.5
-12
0
1
2
3
4
5
6
1
0
1
2
3
4
5
6
Frequency(GHz)
Frequency(GHz)
SRF300/SRF303 Time Response (RF Note 6)
1.1
0.9
90%
0.7
37ps reference
Volt
0.5
0.3
0.1
-0.1
-100
62.3ps propagation delay time
51.3ps pulse rise time
10%
0
100
200
300
400
500
600
700
800
900
Time (ps)
RF NOTES
1. Test conditions:
2.
3.
4.
5.
6.
7.
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
© 2010 TELEDYNE RELAYS
SRF300SRF303\102012\Q3
SRF300/SRF303 Page 2
Series SRF300/SRF303
DPDT Non-Latching Electromechanical Relay
Signal Integrity up to 18Gbps
SERIES SRF300/SRF303
GENERAL ELECTRICAL SPECIFICATIONS (@25
°C)
Contact Arrangement
Rated Duty
Contact Resistance
Contact Load Rating
Contact Life Ratings
Coil Operating Power
Operate Time
Release Time
Intercontact Capacitance
Insulation Resistance
Dielectric Strength
Negative Coil Transient (Vdc)
Diode P.I.V. (Vdc)
2 Form C (DPDT)
Continuous
0.15
Ω
max.
Resistive: 1Amp/28Vdc
Low level: 10 to 50
μA
@ 10 to 50 mV
10,000,000 cycles (typical) at low level
SRF300-5: 500 mW @ nominal coil
SRF303-5: 250 mW @ nominal coil
SRF300: 4.0 mS max.
SRF303: 6.0 mS max.
SRF300: 3.0 mS max.
SRF303: 3.0 mS max.
0.4 pf typical
1,000 MΩ min. between mutually isolated terminals
350 Vrms (60 Hz) @ atmospheric pressure
SRF300D/SRF303D,
SRF300DD/SRF303DD
SRF300D/SRF303D,
SRF300DD/SRF303DD
1.0 max
100 min.
SRF300D, SRF300DD: 4.0 mS max.
SRF303D, SRF303DD: 7.5 mS max.
SRF300-12: 370 mW @ nominal coil
SRF303-12: 169 mW @ nominal coil
DETAILED ELECTRICAL SPECIFICATIONS (@25°C)
BASE PART NUMBERS (SRF300, SRF300D,
SRF300DD)
Coil Voltage, Nominal (Vdc)
Coil Resistance (Ohms
±20%)
Coil Current (mAdc@ 25
°C)(RF300DD Series)
Pick-up Voltage (Vdc
max.)
SRF300, SRF300D
SRF300DD (General
Note II)
Min.
Max.
SRF300, SRF300D,
SRF300DD
SRF300-5
SRF300D-5
SRF300DD-5
SRF300-12
SRF300D-12
SRF300DD-12
5.0
50
39
93.2
128.2
3.6
3.9
12.0
390
390
25.6
32.8
9.0
10.0
BASE PART NUMBERS (SRF303, SRF303D,
SRF303DD)
Coil Voltage, Nominal (Vdc)
Coil Resistance (Ohms
±20%)
Coil Current (mAdc@ 25
°C)(RF303DD Series)
Pick-up Voltage (Vdc
max.)
SRF303, SRF303D
SRF303DD (General
Note II)
Min.
Max.
SRF303, SRF303D,
SRF303DD
SRF303-5
SRF303D-5
SRF303DD-5
SRF303-12
SRF303D-12
SRF303DD-12
5.0
100
64
56.8
78.1
3.6
3.7
12.0
850
850
11.7
15.0
9.0
11.0
© 2010 TELEDYNE RELAYS
(800) 284-7007 • www.teledynerelays.com
SRF300/SRF303 Page 3
SRF300SRF303\102012\Q3
Series SRF300/SRF303
DPDT Non-Latching Electromechanical Relay
Signal Integrity up to 18Gbps
SERIES SRF300/SRF303
OUTLINE DIMENSIONS
(Viewed From Terminals)
SCHEMATIC DIAGRAMS
9
8
7
6
4
1
2
3
8
7
6
4
1
2
3
8
7
6
4
9
9
1
2
3
SRF300/RF303
NOTES:
SRF300D/SRF303D
SRF300DD/SRF303DD
1. DIMENSIONS ARE IN INCHES, METRIC EQUIVALENTS SHOWN IN ( ).
2. POSTITIONS 5 AND 10 ARE FOR UNINSULATED CASE GROUND OPTIONS.
3. NO PROTRUSION BELOW BOTTOM OF HEADER WHEN GROUND PINS ARE INSTALLED
4. TO ORDER THE CASE GROUND OPTION, AFTER THE SERIES DESIGNATOR, ADD “Y” TO THE PART NUMBER FOR POSITION
5 OR “Z” TO THE PART NUMBER FOR POSITION 10.
Teledyne Part Numbering System for SRF300/SRF303 Relays
SRF300DD Y - 5 / R
Relay Series
* Surface Mount Relays are
Solder-Coated by default
(Note 3)
R = RoHS Compliant
Coil Voltage
Ground Pin Optional
(
See Appendix D)
D = Internal Diode for coil
transient suppression
DD = Internal Diodes for
coil transient
suppression and polarity
reversal protection
NOTES:
1
Standard Relay lead
fi
nish: Solder-Dipped Leads (Sn60/Pb40)
2
For RoHS Solder, add /R at end of part number. EX: SGRF303D-5/R
RoHS Solder: (Sn99.3/Cu0.7)
3
The slash and characters appearing after the slash are not marked on the relay.
GENERAL NOTES
I. Relays will exhibit no contact chatter in excess of 10
μsec
or transfer in excess of 1
μsec.
II. For reference only. Coil resistance not directly measureable at relay terminals due to internal series diode.
SRF300/SRF303 Page 4
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
© 2010 TELEDYNE RELAYS
SRF300SRF303\102012\Q3
Series SRF300/SRF303
DPDT Non-Latching Electromechanical Relay
Signal Integrity up to 18Gbps
SERIES SRF300/SRF303
TYPICAL SIGNAL INTEGRITY CHARACTERISTICS @ 10 Gbps
Normally Closed (Typ.)
+120 mV
0V
-120 mV
0 ps
40 ps
80 ps
120 ps
160 ps
Bit Rate
10 Gbps
Eye Height
137.9 mV
Eye Width
85.83 ps
Jitter
P-P
13.33 ps
Normally Open (Typ.)
+120 mV
0V
-120 mV
0 ps
40 ps
80 ps
120 ps
160 ps
Bit Rate
10 Gbps
•
•
•
•
•
Eye Height
72.8 mV
Eye Width
88.1 ps
Jitter
P-P
8.00 ps
PATTERN GENERATOR SETTINGS
10 Gbps Random Pulse Pattern Generator
2
31
- 1 PRBS signal
PRBS output of 300 mV
P-P
(nominal)
RF PCB effect (negligible) not removed from measurement
Data shown is typical of both poles
© 2010 TELEDYNE RELAYS
(800) 284-7007 • www.teledynerelays.com
SRF300/SRF303 Page 5
SRF300SRF303\102012\Q3
PCB Design
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