421 Page 3

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE

©2005 TELEDYNE RELAYS

www.teledynerelays.com

421/1205/Q1

9

8

7

6

4

2

1

DIMENSIONS ARE SHOWN IN INCHES (MILLIMETERS)

.370

(9.40)

DIA. MAX.

.335

(8.51)

DIA. MAX.

.280 (7.11) MAX.

+.002 (.05)

.017 (.43) –.001 (.03) DIA.

WIRE LEAD: .75 (19.05) MIN.

PIN: .187 (4.75) ±.010 (.25)

(See Note 6)

TERMINAL LOCATIONS AND PIN NUMBERING (REF. ONLY)

(Viewed from Terminals)

.035 (.89)

±.010 (0.25)

.031 (.79)

±.003 (0.08)

36° ±3°

TYP.

.200 (5.08)

±.010 (.25) DIA.

CASE DETAIL

OUTLINE DIMENSIONS

GENERAL NOTES

1. Relay 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. Unless otherwise specified, parameters are initial values.

4. For reference only. Coil resistance not directly measurable at relay terminals due to

internal series diode, 421DD only.

5. Unless otherwise specified, relays will be supplied with either gold-plated or solder-

coated leads.

6. The slash and characters appearing after the slash are not marked on the relay.

7. Screened HI-REL versions available. Contact factory.

8.

COIL A

COIL B

421

COIL A

COIL B

421D

COIL A

COIL B

421DD

SCHEMATICS ARE VIEWED FROM TERMINALS

COIL A LAST ENERGIZED

SCHEMATIC DIAGRAMS

Teledyne Part Numbering System for

ER 421 X M3 - 26 A / S Q

Established Reliability

Designator

Pad Option

(See Appendix)

Relay Series

Optional Ground Pin

(See Appendix)

Q= Solder Coated Leads

G= Gold Plated Leads

(Notes 5 and 6)

S= 0.187" leads

(Note 6)

Coil Voltage

Screening and Reliability

Level

Teledyne Part Numbering System for Military Qualified (JAN) Relays

JAN part number example is for reference only. Actual part number may not exist.

J

421 X

M - 26 P

L

Military (JAN)

Designator

Pad Option

(See Appendix)

Relay Series

Optional Ground Pin

(See Appendix)

Terminal Variant

P = 0.187"

Coil Voltage

Screening and Reliability

Level

SERIES 421