©2005 TELEDYNE RELAYS

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE

421 Page 2

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421/1205/Q1

PERFORMANCE CURVES

(NOTE 2)

SERIES 421

GENERAL ELECTRICAL SPECIFICATIONS (–65°C to +125°C unless otherwise noted) (Notes 2 & 3)

DETAILED ELECTRICAL SPECIFICATIONS (–65°C to +125°C unless otherwise noted) (Note 3)

Contact Arrangement

1 Form C (SPDT)

Rated Duty

Continuous

Contact Resistance

0.125 ohm max. before life; 0.225 ohm max. after life at 0.5A/28Vdc (measured 1/8" from header)

Contact Load Ratings (DC)

(See Fig. 2 for other DC

resistive voltage/current ratings)

Resistive:

0.5 Amp/28Vdc

Inductive:

200 mA/28Vdc (320 mH)

Lamp:

100 mA/28Vdc

Low Level:

10 to 50 µA/10 to 50mV

Contact Load Ratings (AC)

Resistive:

250 mA/115Vac, 60 and 400 Hz (Case not grounded)

100 mA/115Vac, 60 and 400 Hz (Case grounded)

Contact Life Ratings

10,000,000 cycles (typical) at low level

100,000 cycles min. at all other loads specified above

Contact Overload Rating

1A/28Vdc Resistive (100 cycles min.)

Contact Carry Rating

Contact factory

Coil Operating Power

290 milliwatts typical at nominal rated voltage @ 25°C

Operate Time

1.5 msec max. at nominal rated coil voltage

Contact Bounce

1.5 msec max.

Minimum Operate Pulse

4.5 msec width @ rated voltage

Intercontact Capacitance

0.4 pf typical

Insulation Resistance

10,000 megohms min. between mutually isolated terminals

Dielectric Strength

Atmospheric pressure: 500 Vrms/60Hz

70,000 ft.: 125 Vrms/60Hz

Negative Coil Transient (Vdc)

421D/421DD

1.0 max

Diode P.I.V. (Vdc)

421D/421DD

100 min.

BASE PART

NUMBERS

(See Note 8 for full P/N example)

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

Coil Voltage (Vdc)

Nom.

5.0

6.0

9.0

12.0

18.0

26.5

Max.

6.0

8.0

12.0

16.0

24.0

32.0

Coil Resistance

(Ohms ±10% @25°C)

421/421D

61

120

280

500

1130

2000

421DD (Note 4)

48

97

280

500

1130

2000

Coil Current (mAdc @25°C)

(421DD Series only)

Min.

78.0

45.8

25.7

19.6

13.4

11.2

Max.

111.8

63.0

34.9

26.7

18.8

15.2

Set & Reset Voltage

(Vdc, Max.)

421

3.5

4.5

6.8

9.0

13.5

18.0

421D

3.7

4.5

6.8

9.0

13.5

18.0

421DD

4.5

5.5

7.8

10.0

14.5

19.0

0

.1

.2

.3

.4

10

20

30

40

50

60

70

.01

0.5

.1

.5

1.0

FREQUENCY (GHz)

FIGURE 1

TYPICAL RF PERFORMANCE

ISOL

ATIO

N AC

ROS

S CO

NTAC

TS

1.92

1.22

1.07

1.02

1.01

1.00

1.00

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)

RETU

RN LO

SS (V

SWR)

INSERT

ION LO

SS