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G4 I/O Family

Opto 22 G4 I/O Family offers I/O modules with an LED status indicator on the top of the module and a more compact footprint than the previous G1 I/O modules. The G4 product lineup includes not only discrete and analog I/O modules but also controllers, battery packs, fuse clips, tools, and accessories. The discrete I/O modules can switch up to 3A per channel, and each module is individually fused. The analog I/O modules provide complete electrical channel-to-channel isolation, which eliminates troublesome ground loop problems. The Opto 22 G4 products are guaranteed for life and are suitable for new installations, legacy Optomux and mistic systems, Raspberry Pi, and more.

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Part #

Fuse Clips G4 Fuse Retaining Clip 10 Pack

G4 FUSE CLIP
Opto 22
1: $29.384
1In Stock

Mfr. Part #
G4 FUSE CLIP

Mouser Part #
94-G4FUSECLIP

Opto 22

Fuse Clips G4 Fuse Retaining Clip 10 Pack

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Datasheet

1In Stock

$29.384

$28.469

$27.354

$26.334

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Min.: 1
Mult.: 1

Terminal Block Tools & Accessories G4 16-Position Strap for Single Rack, Black (10-Pack)

G4STRAPB-BLACK
Opto 22
1: $111.101
1In Stock

Mfr. Part #
G4STRAPB-BLACK

Mouser Part #
94-G4STRAPB-BLACK

Opto 22

Terminal Block Tools & Accessories G4 16-Position Strap for Single Rack, Black (10-Pack)

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Datasheet

1In Stock

$111.101

$110.596

$107.094

$103.928

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Min.: 1
Mult.: 1

Fuse Clips G4 FUSE SOCKET 100-PACK

G4 FUSE SOCKETS
Opto 22
1: $99.332
1In Stock

Mfr. Part #
G4 FUSE SOCKETS

Mouser Part #
94-G4FUSESOCKETS

Opto 22

Fuse Clips G4 FUSE SOCKET 100-PACK

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Datasheet

1In Stock

$99.332

$82.400

$76.006

$62.891

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Min.: 1
Mult.: 1

I/O Modules G4 AC Output 24-280 VAC, 5 VDC Logic

G4OAC5A
Opto 22
1: $37.083
558In Stock

Mfr. Part #
G4OAC5A

Mouser Part #
94-G4OAC5A

Opto 22

I/O Modules G4 AC Output 24-280 VAC, 5 VDC Logic

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Datasheet

558In Stock

$37.083

$33.938

$33.265

$32.928

$29.900

Min.: 1
Mult.: 1

I/O Modules G4 DC Input 10-32 VDC, 24 VDC Logic

G4IDC24
Opto 22
1: $39.512
102In Stock

Mfr. Part #
G4IDC24

Mouser Part #
94-G4IDC24

Opto 22

I/O Modules G4 DC Input 10-32 VDC, 24 VDC Logic

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Datasheet

102In Stock

$39.512

$36.199

$31.204

Min.: 1
Mult.: 1

I/O Modules G4 DC Input 10-32 VDC, 5 VDC Logic

G4IDC5
Opto 22
1: $36.536
160In Stock

Mfr. Part #
G4IDC5

Mouser Part #
94-G4IDC5

Opto 22

I/O Modules G4 DC Input 10-32 VDC, 5 VDC Logic

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Datasheet

160In Stock

$36.536

$33.885

$32.939

$32.529

$31.509

Min.: 1
Mult.: 1

I/O Modules G4 AC Output 24-280 VAC, 24 VDC Logic

G4OAC24A
Opto 22
1: $37.672
81In Stock

Mfr. Part #
G4OAC24A

Mouser Part #
94-G4OAC24A

Opto 22

I/O Modules G4 AC Output 24-280 VAC, 24 VDC Logic

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Datasheet

81In Stock

$37.672

$32.928

$31.908

$30.772

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Min.: 1
Mult.: 1

I/O Modules G4 AC Output 12-140 VAC, 5 VDC Logic

G4OAC5
Opto 22
1: $36.252
89In Stock

Mfr. Part #
G4OAC5

Mouser Part #
94-G4OAC5

Opto 22

I/O Modules G4 AC Output 12-140 VAC, 5 VDC Logic

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Datasheet

89In Stock

$36.252

$33.339

$32.529

$32.087

$29.900

Min.: 1
Mult.: 1

I/O Modules G4 DC Output 5-60 VDC, 24 VDC Logic

G4ODC24
Opto 22
1: $36.609
350In Stock
702Expected 9/4/2026

Mfr. Part #
G4ODC24

Mouser Part #
94-G4ODC24

Opto 22

I/O Modules G4 DC Output 5-60 VDC, 24 VDC Logic

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Datasheet

350In Stock

702Expected 9/4/2026

$36.609

$33.360

$32.802

$29.900

Min.: 1
Mult.: 1

I/O Modules G4 DC Output 5-60 VDC, 5 VDC Logic

G4ODC5
Opto 22
1: $38.692
424In Stock

Mfr. Part #
G4ODC5

Mouser Part #
94-G4ODC5

Opto 22

I/O Modules G4 DC Output 5-60 VDC, 5 VDC Logic

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Datasheet

424In Stock

$38.692

$34.453

$33.801

$32.318

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Min.: 1
Mult.: 1

I/O Modules G4 Reed Relay Output, 5 VDC logic, normally open

G4ODC5R
Opto 22
1: $38.828
241In Stock

Mfr. Part #
G4ODC5R

Mouser Part #
94-G4ODC5R

Opto 22

I/O Modules G4 Reed Relay Output, 5 VDC logic, normally open

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Datasheet

241In Stock

$38.828

$36.062

$34.916

$34.075

$31.204

Min.: 1
Mult.: 1

Modules Accessories G4 16-channel I/O Module Rack

G4PB16
Opto 22
1: $214.271
10In Stock

Mfr. Part #
G4PB16

Mouser Part #
94-G4PB16

Opto 22

Modules Accessories G4 16-channel I/O Module Rack

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Datasheet

10In Stock

$214.271

$196.750

$193.711

$192.375

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Min.: 1
Mult.: 1

Mounting Hardware G4 MODULE SOCKET 100-PACK

G4-MOD-SOCKETS
Opto 22
1: $64.563
2In Stock

Mfr. Part #
G4-MOD-SOCKETS

Mouser Part #
94-G4-MOD-SOCKETS

Opto 22

Mounting Hardware G4 MODULE SOCKET 100-PACK

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Datasheet

2In Stock

$64.563

$62.712

$61.293

$60.020

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Min.: 1
Mult.: 1

I/O Modules G4 AC Input 90-140 VAC/VDC, 5 VDC Logic, Low Impedance

G4IAC5L
Opto 22
1: $38.660
1In Stock

Mfr. Part #
G4IAC5L

Mouser Part #
94-G4IAC5L

Opto 22

I/O Modules G4 AC Input 90-140 VAC/VDC, 5 VDC Logic, Low Impedance

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Datasheet

1In Stock

$38.660

$34.211

$33.623

$32.960

$29.900

Min.: 1
Mult.: 1

I/O Modules G4 DC Input - DC voltage, self-powered, normally open

G4IDC5-SW
Opto 22
1: $74.460
6In Stock

Mfr. Part #
G4IDC5-SW

Mouser Part #
94-G4IDC5-SW

Opto 22

I/O Modules G4 DC Input - DC voltage, self-powered, normally open

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Datasheet

6In Stock

$74.460

$67.897

$67.171

$67.014

$58.811

Min.: 1
Mult.: 1

I/O Modules G4 DC Input 2.5-28 VDC, 5 VDC Logic

G4IDC5D
Opto 22
1: $37.051
25In Stock

Mfr. Part #
G4IDC5D

Mouser Part #
94-G4IDC5D

Opto 22

I/O Modules G4 DC Input 2.5-28 VDC, 5 VDC Logic

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Datasheet

25In Stock

$37.051

$33.528

$32.034

$29.900

Min.: 1
Mult.: 1

I/O Modules G4 DC Input 2.5-16 VDC, 5 VDC Logic, Very High Speed

G4IDC5K
Opto 22
1: $35.126
15In Stock

Mfr. Part #
G4IDC5K

Mouser Part #
94-G4IDC5K

Opto 22

I/O Modules G4 DC Input 2.5-16 VDC, 5 VDC Logic, Very High Speed

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Datasheet

15In Stock

$35.126

$31.330

$31.319

$26.934

Min.: 1
Mult.: 1

I/O Modules G4 AC Output 12-140 VAC, 24 VDC Logic

G4OAC24
Opto 22
1: $40.742
14In Stock

Mfr. Part #
G4OAC24

Mouser Part #
94-G4OAC24

Opto 22

I/O Modules G4 AC Output 12-140 VAC, 24 VDC Logic

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Datasheet

14In Stock

$40.742

$35.179

$35.169

$29.900

Min.: 1
Mult.: 1

I/O Modules G4 DC Output 5-200 VDC, 5 VDC Logic

G4ODC5A
Opto 22
1: $44.529
8In Stock

Mfr. Part #
G4ODC5A

Mouser Part #
94-G4ODC5A

Opto 22

I/O Modules G4 DC Output 5-200 VDC, 5 VDC Logic

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Datasheet

8In Stock

$44.529

$37.850

$32.171

Min.: 1
Mult.: 1

I/O Modules G4 Reed Relay Output, 5 VDC logic, normally closed

G4ODC5R5
Opto 22
1: $56.265
27In Stock

Mfr. Part #
G4ODC5R5

Mouser Part #
94-G4ODC5R5

Opto 22

I/O Modules G4 Reed Relay Output, 5 VDC logic, normally closed

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Datasheet

27In Stock

$56.265

$53.373

$52.038

$51.301

$45.833

Min.: 1
Mult.: 1

Modules Accessories G4 16-channel Mounting Rack with Header Connector

G4PB16H
Opto 22
1: $209.476
4In Stock

Mfr. Part #
G4PB16H

Mouser Part #
94-G4PB16H

Opto 22

Modules Accessories G4 16-channel Mounting Rack with Header Connector

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Datasheet

4In Stock

$209.476

$190.219

Min.: 1
Mult.: 1

Modules Accessories G4 16-channel I/O Module Rack with Terminal Strip

G4PB16T
Opto 22
1: $232.939
4In Stock

Mfr. Part #
G4PB16T

Mouser Part #
94-G4PB16T

Opto 22

Modules Accessories G4 16-channel I/O Module Rack with Terminal Strip

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Datasheet

4In Stock

$232.939

$212.336

Min.: 1
Mult.: 1

Modules Accessories G4 Digital 4-Channel Mounting Rack

G4PB4
Opto 22
1: $87.848
14In Stock

Mfr. Part #
G4PB4

Mouser Part #
94-G4PB4

Opto 22

Modules Accessories G4 Digital 4-Channel Mounting Rack

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Datasheet

14In Stock

$87.848

$80.591

$80.444

$68.518

Min.: 1
Mult.: 1

Modules Accessories G4 4-channel Output Module Rack

G4PB4R
Opto 22
1: $84.829
8In Stock

Mfr. Part #
G4PB4R

Mouser Part #
94-G4PB4R

Opto 22

Modules Accessories G4 4-channel Output Module Rack

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Datasheet

8In Stock

$84.829

$78.361

$76.458

$67.319

Min.: 1
Mult.: 1

Modules Accessories G4 8-channel I/O Module Rack

G4PB8
Opto 22
1: $116.601
1In Stock

Mfr. Part #
G4PB8

Mouser Part #
94-G4PB8

Opto 22

Modules Accessories G4 8-channel I/O Module Rack

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Datasheet

1In Stock

$116.601

$110.354

$110.301

$110.186

$100.563

Min.: 1
Mult.: 1

G4 I/O Family

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