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 National Instruments Corporation

11

FEATURES
• Transient Protection: Meets the

requirements of IEEE 472, “Surge
Withstanding Capability Test”

• SPST, Normally Open
• Zero Crossing Turn-On
• UL Recognized, CSA Certified
• G5 Modules Passed IEC801.2,

IEC801.3, and IEC801.4

• 4000 Vac Optical Isolation
• G5 Modules Provide Replaceable

5 x 20 mm Glass Fuse and Built-in
Status LED

• Lifetime Warranty

Fuses are 5 Amp Littlefuse part number 217005 or
equivalent.

*Part Numbers: 70G-OAC5

70G-OAC5A
70G-OAC5A-11
70G-OAC15
70G-OAC15A
70G-OAC24
70G-OAC24A

T U V     R h e i n l a n d

• •

Maximum Current Versus
Ambient Temperature
The chart indicates continuous current to limit the
junction temperatures to 100˚C. Information is
based on steady state heat transfer in a 2 cubic
foot sealed enclosure.

Maximum Peak Surge Current
Versus Surge Duration
Information is based on a supply frequency of
60 Hz sinusoidal and a resistive or inductive load.
Application of maximum surge current may not be
repeated until the module temperature has re-
turned to its steady state value.

For complete dimensional drawings, see pages
29-30.

STANDARD & G5 PACKAGE

MINIATURE PACKAGE

Fuse and Status LED in G5 modules only.

Trigger circuit provides zero voltage turn-
on except for part numbers 70-OAC5A5
and 70-OAC5A-11, which have random
(fast) turn-on.

  70G-OAC               70-OAC                 70M-OAC

*        *

4

3

2

1

- 40

- 20

0

20

40

60

80

100

80

40

60

30
20

10

6
4

3
1

1

1

2 3 4 6

20

10

40 60 100

1000

300
200

100

1

2

3

4

Rx

VAC

DC CONTROL

TRIGGER

CIRCUIT

SNUBBER 

LOAD

LOAD

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