SERIES 421
GENERAL ELECTRICAL SPECIFICATIONS (–65°C to +125°C unless otherwise noted) (Notes 2 & 3)
Contact Arrangement
Rated Duty
1 Form C (SPDT)
Continuous
Contact Resistance
0.125 ohm max. before life; 0.225 ohm max. after life at 0.5A/28Vdc (measured 1/8" from header)
Resistive:
Inductive:
Lamp:
0.5 Amp/28Vdc
200 mA/28Vdc (320 mH)
100 mA/28Vdc
Contact Load Ratings (DC)
(See Fig. 2 for other DC
resistive voltage/current ratings)
Low Level:
10 to 50 µA/10 to 50mV
Resistive:
250 mA/115Vac, 60 and 400 Hz (Case not grounded)
100 mA/115Vac, 60 and 400 Hz (Case grounded)
Contact Load Ratings (AC)
Contact Life Ratings
10,000,000 cycles (typical) at low level
100,000 cycles min. at all other loads specified above
Contact Overload Rating
Contact Carry Rating
Coil Operating Power
Operate Time
1A/28Vdc Resistive (100 cycles min.)
Contact factory
290 milliwatts typical at nominal rated voltage @ 25°C
1.5 msec max. at nominal rated coil voltage
1.5 msec max.
Contact Bounce
Minimum Operate Pulse
Intercontact Capacitance
Insulation Resistance
Dielectric Strength
4.5 msec width @ rated voltage
0.4 pf typical
10,000 megohms min. between mutually isolated terminals
Atmospheric pressure: 500 Vrms/60Hz
421D/421DD
70,000 ft.: 125 Vrms/60Hz
1.0 max
Negative Coil Transient (Vdc)
Diode P.I.V. (Vdc)
421D/421DD
100 min.
DETAILED ELECTRICAL SPECIFICATIONS (–65°C to +125°C unless otherwise noted) (Note 3)
421-5
421D-5
421DD-5
421-6
421D-6
421DD-6
421-9
421D-9
421DD-9
421-12
421D-12
421DD-12
421-18
421D-18
421DD-18
421-26
421D-26
421DD-26
BASE PART
NUMBERS
(See Note 8 for full P/N example)
Nom.
Max.
5.0
6.0
6.0
8.0
9.0
12.0
280
280
25.7
34.9
6.8
12.0
16.0
500
500
19.6
26.7
9.0
18.0
24.0
1130
1130
13.4
18.8
13.5
13.5
14.5
26.5
32.0
2000
2000
11.2
15.2
18.0
18.0
19.0
Coil Voltage (Vdc)
Coil Resistance
421/421D
421DD (Note 4)
Min.
61
120
97
(Ohms ±10% @25°C)
48
78.0
111.8
3.5
45.8
63.0
4.5
Coil Current (mAdc @25°C)
(421DD Series only)
Max.
421
Set & Reset Voltage
(Vdc, Max.)
421D
3.7
4.5
6.8
9.0
421DD
4.5
5.5
7.8
10.0
PERFORMANCE CURVES
(NOTE 2)
TYPICAL RF PERFORMANCE
TYPICAL DC CONTACT RATING (RESISTIVE)
0
.1
300
250
200
150
100
50
.2
.3
.4
10
20
30
40
50
60
70
1.92
1.22
1.07
1.02
1.01
1.00
1.00
.01
0.5
.1
.5
1.0
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)
FREQUENCY (GHz)
FIGURE 2
FIGURE 1
©2005 TELEDYNE RELAYS
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
www.teledynerelays.com
421 Page 2
421/1205/Q1
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