Series 431
SPDT Non-Latching
Established Reliability / Military Relay
ESTABLISHED RELIABILITY
MILITARY
TO-5 RELAYS
SENSITIVE SPDT
SERIES RELAY TYPE
431 SPDT basic relay
431D SPDT relay with internal diode for coil transient suppression
431DD SPDT relay with polarity reversal protection and coil transient suppression diode
431T SPDT relay with internal transistor driver and coil transient suppression diode
Precious metal alloy contact material with gold plating assures excellent
DESCRIPTION
high current and dry circuit switching capabilities.
The TO-5 relay, originally conceived and developed by Teledyne, has
become one of the industry standards for low-level switching from dry circuit
The Series 431D and 431DD relays have internal discrete silicon diodes
to 1 ampere. Designed specifically for high-density PC board mounting, its
for coil suppression and polarity reversal protection. The hybrid 431T relay
small size and low coil power dissipation make the 431 relay one of the most
features an internal silicon suppression diode and transistor driver. This
versatile ultraminiature relays available.
hybrid package reduces required PC board floor space by reducing the
number of external components needed to drive the relay.
The following unique construction features and manufacturing techniques
provide excellent resistance to environmental extremes and overall high
By virtue of its inherently low intercontact capacitance and contact circuit
reliability.
losses, the 431 relay has proven to be an excellent ultraminiature RF
The 431 feature:
switch for frequency ranges well into the UHF spectrum. A typical RF
application for the TO-5 relay is in handheld radio transceivers, wherein
All welded construction.
the combined features of good RF performance, small size, low coil power
Unique uni-frame design, providing high magnetic efficiency and
dissipation and high reliability make it a preferred method of T-R switching
mechanical rigidity.
(see Figure 1).
High force/mass ratios for resistance to shock and vibration.
Advanced cleaning techniques provide maximum assurance of internal
cleanliness.
ENVIRONMENTAL AND
INTERNAL CONSTRUCTION
PHYSICAL SPECIFICATIONS
Temperature
65C to +125C
(Ambient)
UNI-FRAME
Vibration
30 gs to 500 Hz
UPPER
(General Note I)
STATIONARY
CONTACT
Shock 75 gs,
(General Note I) 6ms half sine
ARMATURE
LOWER
Acceleration 50 gs
STATIONARY
CONTACT
Enclosure Hermetically sealed
MOVING
Weight 0.109 oz. (3.09g) max.
CONTACT
2016 TELEDYNE RELAYS (800) 284-7007 www.teledynerelays.com 431 Page 1
431\032016\Q1INSERTION LOSS
Series 431
SPDT Non-Latching
Established Reliability / Military Relay
SERIES 431
GENERAL ELECTRICAL SPECIFICATIONS (-65 C to 125 C unless otherwise noted. See notes 2 & 3.)
Contact Arrangement 1 Form C (SPDT)
Rated Duty Continuous
Contact Resistance 0.1 max.; 0.2 max. afterlife at A / 28 Vdc
Resistive: 1 A/ 28 Vdc
Inductive: 200 mA/ 28 Vdc (320mH)
Contact Load Rating (DC)
Lamp: 100 mA / 28 Vdc (320mH)
Low level: 10 to 50 A @ 10 to 50 mV
Resistive: 250 mA / 115Vac, 60 and 400 Hz (Case not grounded)
Contact Load Rating (AC)
100 mA / 115 Vac, 60 and 400 Hz (Case grounded)
10,000,000 cycles (typical) at low level
Contact Life Ratings 1,000,000 cycles (typical) at 0.5 A / 28 Vdc resistive
100,000 cycles min. at all other loads speci ed above
Contact Overload Rating 2 A / 28 Vdc Resistive (100 cycles min.)
Coil Operating Power 150 mW typical at nominal rated voltage
Contact Carry Rating Contact Factory
431
431D 4.0 ms max.
Operate Time
431DD
431T 3.5 ms max.
431 2.5 ms max.
431D
Release Time
431DD 7.5 ms max.
431T
Contact Bounce 1.5 ms max.
Intercontact Capacitance 0.4 pf typical
Insulation Resistance 10,000 M min. between mutually isolated terminals
Dielectric Strength
Atmospheric pressure : 500 70,000 ft : 125
(Vrms/60 Hz)
Negative Coil 431D
Transient 431DD 1.0 max.
(Vdc) 431T
431D
Diode P.I.V
431DD 100 min.
(Vdc)
431T
Base Turn Off Voltage (Vdc) 0.3 min
431 Transistor
Emitter-Base breakdown Voltage (BV ) (Vdc) 6.0 min
EBO
Characteristics
Collector-Base breakdown Voltage (BV ) (Vdc) (Ic = 100 A) 75 min
CBO
GENERAL NOTES
PERFORMANCE CURVES (Note 2)
1. Relay contacts will exhibit no chatter in
TYPICAL RF PERFORMANCE TYPICAL DC CONTACT RATING (RESISTIVE)
excess of 10 sec or transfer in excess
0
of 1 sec.
.1
2. Typical characteristics are based on
.2 300
available data and are best estimates.
.3
250
No on-going verification tests are
.4
performed.
200
10 1.92
3. Unless otherwise specified, parameters
20 1.22
150 are initial values.
30 1.07
4. Relays can be supplied with a spacer
100
40 1.02
pad. See appendix.
50
1.01
50
60 1.00
70 1.00
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
.01 0.5 .1 .5 1.0
LOAD CURRENT (AMPS DC)
FREQUENCY (GHz)
FIGURE 2
FIGURE 1
431 Page 2 SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE 2016 TELEDYNE RELAYS
431\032016\Q1
RETURN LOSS (VSWR)
ISOLATION ACROSS POLES
ISOLATION ACROSS CONTACTS
dB
VSWR
LOAD VOLTAGE (VDC)