SERIES 421
SCHEMATIC DIAGRAMS
OUTLINE DIMENSIONS
CASE DETAIL
TERMINAL LOCATIONS AND PIN NUMBERING (REF. ONLY)
(Viewed from Terminals)
.370
(9.40)
DIA. MAX.
COIL B
.031 (.79)
.003 (0.08)
.335
(8.51)
DIA. MAX.
36° 3°
TYP.
COIL A
COIL B
9
1
.035 (.89)
.010 (0.25)
421
.280 (7.11) MAX.
8
7
2
.200 (5.08)
.010 (.25) DIA.
4
WIRE LEAD: .75 (19.05) MIN.
PIN: .187 (4.75) .010 (.25)
(See Note 6)
6
+.002 (.05)
–.001 (.03)
.017 (.43)
DIA.
DIMENSIONS ARE SHOWN IN INCHES (MILLIMETERS)
COIL A
421D
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.
COIL B
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
421DD
SCHEMATICS ARE VIEWED FROM TERMINALS
COIL A LAST ENERGIZED
2
®
Teledyne Part Numbering System for T R Established Reliability Relay
ER 421
X M3 - 26 A / S Q
Q= Solder Coated Leads
G= Gold Plated Leads
(Notes 5 and 6)
Estab
Desig
lished
nator
Relia
bility
Relay Series
Optional Ground Pin
(See Appendix)
S= 0.187" leads
(Note 6)
Screening and Reliability
Level
Pad Option
(See Appendix)
Coil Voltage
Teledyne Part Numbering System for Military Qualified (JAN) Relays
421 26
J
X
M
-
P
L
Milita
ry (JA
N)
Screening and Reliability
Level
Desig
nator
Relay Series
Terminal Variant
P = 0.187"
Optional Ground Pin
(See Appendix)
Coil Voltage
Pad Option
(See Appendix)
JAN part number example is for reference only. Actual part number may not exist.
421 Page 3
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
www.teledynerelays.com
©2005 TELEDYNE RELAYS
421/1205/Q1
TELEDYNE [ TELEDYNE TECHNOLOGIES INCORPORATED ]
