ER422-26A/S TELEDYNE, ER422-26A/S Datasheet

ER422-26A/S

Manufacturer Part Number

ER422-26A/S

Description

Electromechanical Relay DPDT 1ADC/0.25AAC 26.5VDC 2KOhm Through Hole

Manufacturer

TELEDYNE

Type

Magnetic Latching Established Reliability Relayr

Datasheet

1.ER422DD-12A.pdf (6 pages)

Specifications of ER422-26A/S

Contact Arrangement

DPDT

Dc Coil Voltage

26.5 V

Coil Current

13.25 mA

Mounting

Through Hole

Current page: 1 of 6
Download datasheet (135Kb)

DESCRIPTION

The magnetic-latching 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 for

high-density PC board mounting, its small size and low coil power

dissipation make the 420 and 422 relays some 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

• High force/mass ratios for resistance to shock and vibration.

• Advanced cleaning techniques provide maximum assurance of

• Precious metal alloy contacts material with gold plating assures

PRINCIPLE OF OPERATION

Energizing Coil B produces a magnetic field

opposing the holding flux of the permanent magnet

in Circuit B. As this net holding force decreases, the

attractive force in the air gap of Circuit A, which also

results from the flux of the permanent magnet,

becomes great enough to break the armature free

of Core B, and snap it into a closed position against

Core A. The armature then remains in this position

upon removal of power from Coil B, but will snap

back into position B upon energizing Coil A. Since operation depends upon cancellation

of a magnetic field, it is necessary to apply the correct polarity to the relay coils as

indicated on the relay schematic. When latching relays are installed in equipment, the

latch and reset coils should not be pulsed simultaneously. Coils should not be pulsed

with less than rated coil voltage and the pulse width should be a minimum of three times

the specified operate time of the relay. If these conditions are not followed, it is possible

for the relay to be in the magnetic neutral position.

mechanical rigidity.

internal cleanliness.

excellent high current and dry circuit switching capabilities.

DESIGNATION

420DD/422DD

420D/422D

SERIES

420/422

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE

ESTABLISHED RELIABILITY

DPDT basic relay

DPDT relay with internal diode for coil transient suppression

DPDT relay with internal diodes for coil transient suppression and polarity

reversal protection

MAGNETIC-LATCHING

SOFT IRON

ARMATURE

SOFT IRON

MAGNETIC CIRCUIT B

COIL B

PERMANENT MAGNET

TO-5 RELAYS

www.teledynerelays.com

DPDT

The Series 420D/422D and 420DD/422DD utilize discrete diodes for

coil suppression and polarity reversal protection.

By virtue of its inherently low intercontact capacitance and contact

circuit losses, these TO-5 relays have proven to be excellent

ultraminiature RF switches for frequency ranges well into the UHF

spectrum. A typical RF application for these TO-5 relays is in

handheld radio receivers, wherein the combined features of good RF

performance, small size, very low coil power dissipation and high

reliability make it a preferred method of transmit-receive switching

(see Figure 1).

The Series 420/422 magnetic-latching relays are ideally suited for

applications where power dissipation must be minimized. The relays

can be operated with a short duration pulse. After the contacts have

transferred, no external holding power is required.

The magnetic latching feature of the Series 420/422 relays provide

a “memory” capability, since the relays will not reset upon removal of

coil power.

RELAY TYPE

MAGNETIC CIRCUIT A

SOFT IRON FRAME

CONTACT

MOVING

COIL A

SOFT IRON

COIL A

AIR GAP

STATIONARY

CONTACT

Temperature

(Ambient)

Vibration

(General Note 1)

Shock

(General Note 1)

Acceleration

Enclosure

Weight

PHYSICAL SPECIFICATIONS

ENVIRONMENTAL AND

420/422

SERIES

–65°C to +125°C

30 g’s to 3000 Hz

100 g’s,

6 msec, half-sine

50 g’s

Hermetically sealed

0.10 oz. (2.84g) max.

420 422 Page 1

420 422/1203/Q1

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ER422-26A/S Summary of contents

Page 1

... DESCRIPTION The magnetic-latching 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 for high-density PC board mounting, its small size and low coil power dissipation make the 420 and 422 relays some of the most versatile ultraminiature relays available ...

Page 2

Page 3

... TYP. 420 DIMENSIONS ARE SHOWN IN INCHES (MILLIMETERS) SCHEMATIC DIAGRAMS COIL B COIL A 420 COIL B COIL A 422 ® Established Reliability Relay Teledyne Part Numbering System for ER 422 Teledyne Part Numbering System for Military Qualified (JAN) Relays J 422 www.teledynerelays.com .031 (.79) ± .003 (0.08 ...

Page 4

... ER411T ER412, ER412D, ER412DD 712, 712D, 712TN, RF300, RF310, RF320 H Dim ER420, ER422D, ER420DD, 421, MAX ER421D, ER421DD, ER422, ER422D, ER422DD, 722, 722D, RF341 ER431T, ER432T, ER432, ER432D, ER432DD 732, 732D, 732TN, RF303, RF313, RF323 RF312 ER411, ER411D, ER411DD H Dim MAX ...

Page 5

... ER431T, J431T, ER432, ER432D ER432DD, J432, J432D, J432DD ER432T, J432T 732, 732D, 732TN ER420, J420, ER420D, J420D ER420DD, J420DD, ER421, J421 ER421D, J421D, ER421DD J422D, ER422DD, J422DD, 722 ER411T ER412, ER412D, ER412DD J412, J412D, J412DD 712, 712D ER421, ER421D, ER421DD 722, 732D ...

Page 6

... Appendix A: Ground Pin Positions Ø.200 [Ø5.08] 36° ±3° TO-5 Relays: ER411T, ER412, ER412T, ER420, ER421, ER422, ER431T, ER432, ER432T, 712, 712TN, 400H, 400K, 400V, RF300, RF303, RF341, RF312, RF310, RF313, RF320, RF323 .100 [2.54] .100 [2.54] .050 [1.27] .100 [2.54] Centigrid® ...

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