ransient suppression and polarity
reversal protection
431T
SPDT relay with internal transistor driver and coil transient suppression diode
DESCRIPTION
The TO-5 relay, originally conceived and developed by Teledyne, has become one of the
industry standards for low level switching from dry circuit to 1 ampere. Designed expressly
for high density PC Board mounting, its small size, low coil power dissipation make the
TO-5 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 efficiency 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.
The 431D and 431DD Series utilizes internal discrete silicon diodes for coil suppression
and polarity reversal protection. The hybrid 431T features an internal silicon suppression
diode and transistor driver. This hybrid package reduces PC board floor space by reducing
the number of external components needed to drive the relay.
By virtue of its inherently low intercontact capacitance and contact circuit losses, the TO-5
relay has shown itself to be an excellent ultraminiature RF switch for frequency ranges well
into the UHF spectrum. A typical RF application for the TO-5 relay is in hand held radio
transceivers, wherein the combined features of good RF performance, small size, low coil
power dissipation and high reliability make it a preferred method of T-R switching (see
Figure 1).
INTERNAL CONSTRUCTION
Temperature
-65°C to +125°C
(Ambient)
Vibration
30 gs to 3000 Hz (Note 1)
Shock
75 gs for 6 msec. (Note 1)
half-sine
Acceleration
50 gs (Note 1)
Enclosure
All welded, hermetically sealed
Weight
0.109 oz (3.09 gms.) max.
ENVIRONMENTAL AND
PHYSICAL SPECIFICATIONS
Actual Size
UPPER
STATIONARY
CONTACT
LOWER
STATIONARY
CONTACT
UNI-FRAME
ARMATURE
MOVING
CONTACT Coil Voltage (VDC)
Coil Resistance
(Ohms ±10% @ 25°C)
Coil Current (mADC @ 25°C)
(431DD Series)
Coil Current (mADC @ 25°C)
(431T Series)
Pick-up Voltage (VDC, Max.)
Base Current to Turn On (mADC, Max.) (431T Series) (Note 7)
Drop-out Voltage (VDC)
48
1 Form C (SPDT)
Continuous
0.1 ohm max. before life; 0.2 ohm max. after life at 1A/28VDC, (measured 1/8 from header)
Resistive:
1 Amp/28VDC
Inductive:
200 mA/28VDC (320 mH)
Lamp:
100 mA/28VDC
Low Level: 10 to 50 µA/10 to 50 mV
Resistive:
250 mA/115VAC, 60 and 400Hz (Case not grounded)
100 mA/115VAC, 60 and 400Hz (Case grounded)
10,000,000 cycles (typical) at low level
0
1,000,000 cycles (typical) at 0.5A/28VDC resistive
00,
100,000 cycles min. at all other loads specified above
2A/28VDC Resistive (100 cycles min.)
Contact factory
150 milliwatts typical at nominal rated voltage @ 25°C
431, 431D, 431DD Series: 4.0 msec max. at nominal rated coil voltage
431T: 3.5 msec (Note 7)
431 Series: 2.5 msec max.
431D, 431DD, 431T Series: 7.5 msec max.
1.5 msec max.
0.4 pf typical
10,000 megohms min. between mutually isolated terminals
Atmospheric pressure: 500 VRMS/60 Hz
70,000 ft.: 300 VRMS/60Hz (431T: 125 VRMS/60 Hz)
SERIES 431
GENERAL ELECTRICAL SPECIFICATIONS
(-65°C to +125°C unless otherwise noted) (Notes 2 & 8)
Contact Arrangement
Rated Duty
Contact Resistance
Contact Load Rating (DC)
(See Fig. 2 for other DC
resistive voltage/current ratings)
Contact Load Ratings (AC)
Contact Life Ratings
Contact Overload Rating
Contact Carry Rating
Coil Operating Power
Operate Time
Release Time
Contact Bounce
lntercontact Capacitance
Insulation Resistance
Dielectric Strength
Negative Coil Transient (VDC) (431D, 431DD, 431T)
Diode P.I.V. (VDC) (431D, 431DD, 431T)
DETAILED ELECTRICAL SPECIFICATIONS
(-65°C to +125°C unless otherwise noted) (Note 8)
431-5
431D-5
431DD-5
431T-5
431-6
431D-6
431DD-6
431T-6
431-9
431D-9
431DD-9
431T-9
431-12
431D-12
431DD-12
431T-12
431-18
431D-18
431DD-18
431T-18
431-26
431D-26
431DD-26
431T-26
5.0
6.0
9.0
12.0
18.0
26.5
8.0
11.0
16.0
22.0
33.0
45.0
125
255
630
1025
2300
4000
100
200
630
1025
2300
4000
36.3
22.7
11.5
9.7
6.7
5.7
50.0
30.6
15.0
12.5
8.5
7.2
34.7
21.2
11.8
10.1
6.7
5.7
47.8
27.7
16.8
13.6
9.1
7.7
3.7
4.5
6.8
9.0
13.5
18.0
4.5
5.5
7.8
10.0
14.5
19.0
3.6
4.8
7.8
10.0
14.5
19.0
1.2
0.78
0.48
0.39
0.26
0.20
0.15
0.18
0.35
0.41
0.58
0.89
2.0
2.8
4.2
5.6
8.4
10.4
0.15
0.18
0.35
0.40
0.58
0.89
2.4
2.8
4.2
5.6
8.4
10.4
Nom.
Max.
431, 431D, 431T (Note 3)
431DD (Note 3)
Min.
Max.
Min.
Max.
431, 431D
431DD
431T (Note 7)
Min.
Max.
Min.
Max.
0
.1
.2
.3
.4
.5
.6
10
20
30
40
50
60
70
.01
0.5
.1
.5
1.0
FREQUENCY (GHz)
TYPICAL RF PERFORMANCE
INSER
TION LOSS
1.92
1.22
1.07
1.02
1.01
1.00
1.00
VSWR
300
250
200
150
100
50
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
LOAD CURRENT (AMPS DC)
FIGURE 2
TYPICAL DC CONTACT RATING (RESISTIVE)
LOAD VOL
T
AGE (VDC)
dB
RETURN LOSS (VSWR)
ISOLATION
431T
431, 431D, 431DD
431, 431D, 431DD
431T
431T
431, 431D, 431DD
FIGURE 1
PERFORMANCE CURVES
(NOTE 2)
Base Turn Off Voltage (VDC)
Emitter-base breakdown Voltage (BV
EBO
) (@ 25°C) (VDC)
Collector-base breakdown Voltage (BV
CBO
) (@ 25°C & Ic = 100 µA) (VDC)
431T
Transistor
Characteristics
1.0 max.
100 min.
0.3 min.
6.0 min.
75 min.
BASE PART
NUMBERS
(See Note 11 for full P/N Example
±
431, 431D,
431T (Note 7)
431DD
(Note 7) 1
2
3
4
5
1
2
3
4
6
7
8
9
49
NOTES:
1. Relays contacts will exhibit no chatter in excess of 10 µsec or transfer in excess of 1 µsec.
2. Typical characteristics are based on available data and are best estimates. No on-going verification tests are performed.
3. For reference only. Coil resistance not directly measurable at relays terminals due to internal series semiconductor. 431DD and 431T only.
4. Screened HI-REL versions available. Contact factory.
5. Unless otherwise specified, relays will be supplied with leads as follows: Length will be standard 0.75 (19.05) minimum and will be either
gold plated or solder coated. Contact your local representative for ordering information.
6. The slash and characters appearing after the slash are not marked on the relay.
7. Limit Base Emitter current to 15 mADC.
8. Unless otherwise specified, parameters are initial values.
9. Circuit is typical for all 431T Series. Values shown are for the 5 volt series and apply over the full operating temperature range.
DIMENSIONS ARE SHOWN IN INCHES (MILLIMETERS)
SCHEMATIC DIAGRAMS
SCHEMATICS ARE VIEWED FROM TERMINALS
RELIABILITY LEVEL
A
B
FAILURE RATE %/10,000 CYCLES
1.5
0.75
© 1 9 9 6
TELEDYNE RELAYS
12525 Daphne Avenue
Hawthorne, California 90250
SERIES 431
OUTLINE DIMENSIONS
SPACER PAD
Relays can be supplied with a spacer pad attached to the relay
header. The pad permits the relay to be spaced away from the
mounting surface facilitating solder joint inspection. To order
add M4 to the part number (e.g.: ER431M4-26A).
NOTES:
1. Material: Polyester film.
2. Increase contact resistance by
0.01 ohm.
TYPICAL TTL INTERFACE CIRCUIT
(See Note 9)
5458
750 1N914
3 K B
A
RELAY
COIL
V
T
V
cc
(A) Internal Suppression Diode
(B) Internal Driver Transistor
.370
(9.40)
DIA. MAX.
.335
(8.51)
DIA. MAX.
.375 (9.52) MAX.
+.002 (.05)
.017 (.43) .001 (.03) DIA.
.035 (.89)
± .010 (0.25)
45° ±3°
TYP.
.400 MAX
(10.16)
431
431D
431T
431DD
CASE DETAIL
.031 (.79)
± .003 (0.08)
.200 (5.08)
± .010 (.25) DIA.
WIRE LEAD: .75 (19.05) MIN.
PIN: .187 (4.75) ± .010 (.25)
(See Note 5)
LEAD & PIN LOCATIONS
(Viewed from Terminals)
5 LEADS
36° ±3°
TYP.
8 LEADS
PIN NUMBERS
(For reference only)
10.
431T
431
431, 431D, 431DD
431T
Teledyne Part Numbering System for Established Reliability Relays (See T
2
R
®
Program Introduction)
EXAMPLE:
ER
431
D Z M4
26
A
/
SQ
Established
Reliability Designator
Relay Series
D = Diode Suppression
DD = Diode Suppression and Polarity Protection
T = Transistor Driver
Mounting Variant
Ground Pin (See page 112)
M4 = Spacer Pad
Termination Variant
Q = Solder Coated Leads (Notes 5 and 6)
S = .187 Leads (Notes 5 and 6)
Reliability and Screening Level (Note 10)
Coil Voltage
11.