Best IO Blocks (Nov. 2026) - Rated by CherryPicks' Experts

At a Glance: Our Top Picks

Top 1

SCHNEIDER ELECTRIC ZBE101 ZBE101 N/O Contact Block

9.8
CPR Score
Top 2

TRS Systemtechnik Cnx21 Devicenet I/O Block Mdi016

9.7
CPR Score
Top 3

FURNAS ELECTRIC CO 3SU1400-1AA10-1BA0 Contact Block, Replaces 3SB3400-0B, for...

9.7
CPR Score
Tips


Our team has selected the top 30 best IO Blocks. We found and analyzed dozens of products, analyzed & compared 306 IO Blocks with different brands, including Generic, SIEMENS, Schneider Electric And SOLUSTRE, and analyzed 27 consumer reviews for Industrial Electrical products.

* CherryPicks.Reviews is reader-supported, Our editor review, and recommend the best products based on extensive data analysis, if you click on the product links, we may earn a commission through qualifying products purchased.

The Best IO Blocks Rated by CherryPicks

Market Overview
IO Blocks Reviewed
  • Reviews Analyzed: 27 Items
  • CPR Avg. Rating: 8.5 / 10
30 Products Evaluated
  • Highest Price: $279.38
  • Lowest Price: $5.99
  • Avg. Price: $72.18
Price Disclaimer

Top 30 IO Blocks on Amazon (Verified You can Buy)

Top 1

SCHNEIDER ELECTRIC ZBE101 ZBE101 N/O Contact Block

SCHNEIDER ELECTRIC
ZBE101
1.3 x 1.2 x 0.4 inches
0.02 Pounds

Ratings for SCHNEIDER ELECTRIC (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
clockwerk - ❌ ❌ ❌

Features

N/O Contact Block
Schneider Electric ZBE101
Show More
Top 2

TRS Systemtechnik Cnx21 Devicenet I/O Block Mdi016

Generic
12.6 x 6.3 x 8.27 inches
3.73 pounds

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Rylan-MRO - ❌ ❌ ❌

Features

This item is used and in working condition.
Top 3

FURNAS ELECTRIC CO 3SU1400-1AA10-1BA0 Contact Block, Replaces 3SB3400-0B, for Front MOUNTING, 1NO

SIEMENS
3SU14001AA101BA0
1.1811 x 1.1811 x 0.3937 inches
0.022 Pounds

Ratings for SIEMENS (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Ryzen Parts USA - ❌ ❌ ❌

Features

Made in Germany
Top 4

2002-1861, Conn Terminal Block 4 POS DIN Rail 6.3A Box (5 Items)

WAGO
2002-1861

Ratings for WAGO (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 5

Wire Connectors 2 in 2 Out Quick Connect Splicing Kit - Quick Splitter Block Wire Connector Kit for Home & Automotive, Reusable Electrical Splitter

SOLUSTRE
91555MG8JHE40138
0.51 x 0.51 x 0.51 inches
0.15 Pounds

Ratings for SOLUSTRE (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Joysoul - ❌ ❌ ❌
Foenix - ❌ ❌ ❌

Features

Core Functionality: the Connector Block Electrical 2-in 2-out Quick Connect Wire Splitter Tool offers fast, reusable connections that allow individual wires to be pulled out and replaced without any tools, simplifying your electrical wiring projects
Advanced Design: Features separate shrapnel for each wire intersection to securely manage different wire diameters and prevent cross-connection, ensuring safe and organized wiring especially in tight spaces
Show More
Top 6

6 New Eaton M22-K10 Contact Block M22K10

Generic
1.0 Pounds

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Ryzen Parts USA - ❌ ❌ ❌
Top 7

WLERIR Leverage Press in Quick Connector, DIY mini Splicing Compact Splitter, no Need for Electrical Tape Connection terminals,24-12 AWG,3Pcs (2 in 8 Out)

WLERIR
1.5 x 1.5 x 0.6 inches

Ratings for WLERIR (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Welrirchen - ❌ ❌ ❌

Features

Safety and stability: the wire splicing connector is made of insulating material, which has flame retardant, corrosion resistant and anti-aging properties. These features ensure long-lasting and reliable performance, prevent leakage, and ensure safe use.
Practical split line connector: This quick connector has M3 screw mounting holes on both sides, which can connect multiple sets of wires. It is easy to disassemble and can be reused.
Show More
Top 8

Legrand 1780990000 Wql 2 WF 8

Legrand
1780990000
0.0079 x 0.0079 x 0.0079 Inches
0.0441 Pounds

Ratings for Legrand (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Radwell International - ❌ ❌ ❌
Top 9

Phoenix Contact, PTFIX 6X2 5-NS35A YE, (10 Item/s)

PHOENIX CONTACT
3273138

Ratings for PHOENIX CONTACT (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 10

Inverter ATV61 or ATV71 Option Card Interface Terminal Board

TJKPEKZEN
TJKPEKZEN

Ratings for TJKPEKZEN (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
NingShanXianJinZhouGongChengLaoWuYouXianGongSi - ❌ ❌ ❌

Features

Inverter
Inverter ATV61 or ATV71 option card interface terminal board IO board VX4A1104 terminal block
Top 11

MPT 1 5/S, Conn Feed-Through Terminal Block 2 POS T DIN Rail 17.5A (25 Items)

PHOENIX CONTACT
MPT 1 5/S

Ratings for PHOENIX CONTACT (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 12

Brady, 170853, Pluggable Terminal Blocks 6 Pos 7.62mm Pitch T hru Hole Invert HDR (1 Item/s)

Generic

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 13

ST 1 5 BK, Conn Feed-Through Terminal Block F 2 POS Cable Mount 17.5A (25 Items)

Phoenix..
ST 1 5 BK

Ratings for Phoenix.. (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 14

MCVR 1 5/6-ST-3 5, Conn Terminal Block F 6 POS 3.5mm Screw ST Cable Mount 8A (5 Items)

Phoenix..
MCVR 1 5/ 6-ST-3 5

Ratings for Phoenix.. (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 15

1078999,DIN Rail Terminal Blocks Push-in Term Block Gray Quattro

Generic
6.99 pounds

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Neutron USA - ❌ ❌ ❌

Features

Mounting Style: DIN Rail (NS 35/7.5, NS 35/15) Wire Gauge Min: 26 AWG Wire Gauge Max: 12 AWG Length: 69.2 mm Width: 5.2 mm Height: 45.7 mm
Top 16

ALLEN BRADLEY 1732DS-IB8XOBV4 DEVICENET Safety, Armor Block Guard, 8 Input/ 4 Bipolar Pair Out, 24 VDC, I/O Module

Allen-Bradley
1732DS-IB8XOBV4
0.39 x 0.24 x 0.16 inches
2.33 Pounds

Ratings for Allen-Bradley (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Automation Recovery DBA Freer Tool and Die Inc. - ❌ ❌ ❌

Features

Weight: 2.33lb
Product Dimensions: 10.00 x 6.00 x 4.00 inches
Show More
Top 17

Amphenol, TS03515A00J0G, Pluggable Terminal Block - Plug - Female Sockets - 3 Position - 0.200 (5.08mm) Pitch - 12 to 24AWG - 90° Wire Entry - Screw Rising Cage Clamp. (25 Items)

Generic

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 18

Schneider Electric LADC22 Tesys D Aux Contact Block 2 No + 2 NC, Screw Connection

Schneider Electric
LADC22
1.8898 x 2.0472 x 1.6535 inches
0.0066 Pounds
  • Original Language: English

Ratings for Schneider Electric (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Electrical Powerhouse - ❌ ❌ ❌
Power City Inc - ❌ ❌ ❌

Features

Aux contacts operation. : Overlap closure
Mounting Location: Front
Show More
Top 19

Altech, 37.005, Pluggable Terminal Block - Wire Entry in Same Direction as Plug-in - 5 Position - 5.08 mm Pitch - 15A - 300V - 22 to 14 AWG - AKZ950 Series - Green. (50 Item/s)

Generic
37.005

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 20

DEK-REL- 5/I/1, Relay Terminal Block, with soldered-in Miniature relays, Contact (Agni+Au): Small to Medium Loads, 1 N/O Contact, Input Voltage 5 V

Phoenix..
DEK-REL- 5/I/1

Ratings for Phoenix.. (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 21

MSTBA 2 5/2-G-5 08 BK, Conn Terminal Block HDR 2 POS 5.08mm 12A (50 Items)

PHOENIX CONTACT
MSTBA 2 5/ 2-G-5 08 BK

Ratings for PHOENIX CONTACT (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 22

3205116, Conn Feed-Through Modular Terminal Block F 4 POS T DIN Rail 17.5A (5 Items)

PHOENIX CONTACT
3205116

Ratings for PHOENIX CONTACT (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 23

Weidmuller, 1277840000, Conn Terminal Block F 34 POS 3.5mm Solder ST Cable Mount 10A Box (1 Item/s)

Weidmüller
1277840000
3.1496 x 4.7244 x 4.7244 inches

Ratings for Weidmüller (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 24

1437390-8, 0221=H D SECTIONAL Block (10 Items)

TE
1437390-8

Ratings for TE (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 25

DFMC 0 5/4-ST-2 54, Conn Terminal Block F 4 POS 2.54mm Spring Clamp Cable Mount 6A (5 Items)

PHOENIX CONTACT
DFMC 0 5/ 4-ST-2 54

Ratings for PHOENIX CONTACT (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 26

1009990000, Conn Power Terminal Block 10 POS 4mm Spring Clamp Cable Mount 20A

Weidmüller
1009990000

Ratings for Weidmüller (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 27

ST 1 5-Twin YE, Conn Feed-Through Modular Terminal Blocks 2 POS Cable Mount (25 Items)

PHOENIX CONTACT
ST 1 5-TWIN YE

Ratings for PHOENIX CONTACT (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 28

1734-TB I/O Terminal Base Block 8 Point Point IO Cage Clamp Module 1pc

YTRASPF
ZL0121

Ratings for YTRASPF (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
SISEN Shop - ❌ ❌ ❌

Features

Model: 1734-TB
Type: Industrial Product
Show More
Top 29

Molex/Waldom, 39426-0003, Pluggable Terminal Blocks SR BTS 12MM HDR 85A 600V 3 ASY E (10 Item/s)

Generic
39426-0003

Ratings for Generic (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌
Top 30

Weidmuller, 1376030000, Conn Terminal Block SKT 32 POS 3.5mm Crimp ST Cable Mount 10A Box (1 Item/s)

Weidmüller
1376030000
5.9055 x 2.3622 x 2.3622 inches

Ratings for Weidmüller (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Components eStore - ❌ ❌ ❌

Top 10 IO Blocks - Verified to Buy (November 2026)

Top 10 IO Blocks Brands on Amazon

Here is the list of top-rated brands that were evaluated by CherryPicks.

  • SCHNEIDER ELECTRIC
  • Generic
  • SIEMENS
  • WAGO
  • SOLUSTRE
  • WLERIR
  • Legrand
  • PHOENIX CONTACT
  • TJKPEKZEN
  • Phoenix..

Top 7 IO Blocks Sellers: CPR Seller Rank List

CPR sellers rank is based on CherryPicks-AI bestselling ranking system that helps us analyze each seller's sales trends. The List of top seller ranks is our in-house data, essential for our product ranking to help you make the right shopping choice.

Rank Name Yearly Feedbacks Avg. Ratings
🥇 Neutron USA 541 4.0
🥈 Radwell International 500 4.1
🥉 Automation Recovery DBA Freer Tool and Die Inc. 367 4.4
4 Joysoul 266 4.3
5 Ryzen Parts USA 58 4.7
6 clockwerk 39 4.9
7 Power City Inc 17 4.2
View or download top IO Blocks seller & rating report
Neutron USA [541] Radwell International [500] Automation Recovery DBA Freer Tool and Die Inc. [367] Joysoul [266] Ryzen Parts USA [58] clockwerk [39] Power City Inc [17] Neutron USA 30% Radwell International 28% Automation Recovery DBA Freer Tool and Die Inc. 21% Joysoul 15% Ryzen Parts USA 3% clockwerk 2% Power City Inc 1%

[Get] IO Blocks Deals (✅Exclusively for Prime)

What does "Amazon Fulfilled" Mean?

Amazon Fulfilled refers to products handled by Amazon's logistics, which indicates that the product is stored, packed, and shipped by Amazon from one of its fulfillment centers.

When you order a product that is "Amazon Fulfilled," Amazon takes care of the storage, packing, shipping, and customer service for that product. This often ensures quicker delivery and better customer service compared to products that are not fulfilled by Amazon. It also means that the product is eligible for Amazon's return policy.

What does "Prime" Mean?

"Prime" refers to Amazon Prime Member (Join Amazon Prime Now), which indicates eligibility for Prime benefits. When you see "Prime" next to a product on Amazon, This generally means that if you are  an Amazon Prime member, you can get free two-day shipping on that product, and sometimes even same-day or one-day shipping depending on your location.

Prime members also have access to other benefits, including 2-Day Shipping, Exclusive Member Deals, Prime Video, Buy With Prime, Amazon Music, Prime Gaming, and more.

Shop Prime IO Blocks Deals

What does "Free Shipping" Mean?

"Free Shipping" means that you will not be charged additional fees for the shipping of that product. However, unlike "Prime," which usually guarantees fast two-day shipping, "Free Shipping" doesn't necessarily mean fast shipping.

Sometimes there might be a minimum purchase requirement to qualify for free shipping if you are not a Prime member. For Prime members, the "Free Shipping" usually refers to the free two-day shipping that is one of the benefits of the Prime membership.


Why Should You Trust Us?

Now hundreds and thousands of Industrial Electrical supplies are available on Amazon, Picking the right one is not easy, and that may take a lot of your time, Right? and What is the best IO Blocks to buy for new November 2026?

CherryPicks’s Methodology for Evaluating IO Blocks

We developed the CherryRatings-AI system to identify and score reviews and the CherryPicks-AI ranking system that uses TensorFlow framework to generate the best list, It will help us evaluate Industrial Electrical items that sell on Amazon. The score of items is based on over ten parameters such as analyzing customer review content, product reviewing rating statistics, brand reputation evaluation, comparing product price with features, etc, You can visit How We Rank to learn more in detail.

We collected and analyzed 306 of IO Blocks reviews based on our selection criteria. It helped us shortlist the top qualified and rated IO Blocks for Industrial Electrical, We found that most customers choose IO Blocks with an average price of $72.18, and the top brands are Generic, SIEMENS, Schneider Electric And SOLUSTRE. 

Then our expert-level editors reviewed all those quality items and selected the top 30 IO Blocks for you, We have researched hundreds of sellers and picked the top sellers for Industrial Electrical, including Neutron USA, Radwell International, Automation Recovery DBA Freer Tool and Die Inc., Joysoul, Ryzen Parts USA, clockwerk And Power City Inc. The SCHNEIDER ELECTRIC ZBE101 ZBE101 N/O Contact Block are available for purchase right now, and The seller of #1 rank product has received honest feedback from 16 consumers with an average rating of 4.5.

We've helped a lot of satisfied users get the right Industrial & Scientific product based on their needs, and save lots of time for them to pick IO Blocks to buy.


Written By Ronald M. Bieber

Ronald M. Bieber has rich experience as a science lab instructor in a college and this has provided him with the right requisite knowledge and experience to be a professional in the act of spotting the right and wrong product. He would be helping us make the right choice in this regard.