ABB 1SNK ZS4-D2-S-T2 Double De...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$0.84
ABB 1SNK ZS4-D2-S-T2 Double Deck Screw Clamp Terminal Block

ABB 1SNK ZS4-D2-S-T2 Double Deck Screw Clamp Terminal Block

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Model: 1SNK505062R0000
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ABB ZS4-D2-S-T2 Double Deck Screw Clamp Terminal Block

The ABB ZS4-D2-S-T2 is a double deck screw clamp terminal block engineered to save panel space while handling conductors up to 4 mm² (12 AWG, without insulated ferrule, CB certified) in just 5.2 mm (0.205 in) of spacing. Rated 1000 V AC/DC per IEC, this terminal block is well suited to solar and photovoltaic (PV) applications as well as general industrial control panel wiring where high voltage isolation and compact DIN rail mounting are required. This page covers the ZS4-D2-S-T2 family, available in Grey and Red housing colors to support circuit identification and panel color-coding, with both color options sharing the same electrical performance, mounting, and construction specifications described below.

Key Features

  • Space-Saving Design: Connects conductors up to 4 mm² (12 AWG) in just 5.2 mm (0.205 in) spacing, without insulated ferrule, CB certified.
  • Solar-Ready Voltage Rating: Rated 1000 V AC/DC per IEC, well suited for demanding solar and photovoltaic installations.
  • Screw Clamp Connection: Secure screw clamp terminals sized for a 3.5 mm recommended screwdriver, gauge type A3-B3.
  • DIN Rail Mounting: Mounts on TH35-7.5 (35 x 7.5 mm) and TH35-15 (35 x 15 mm) rails per IEC 60715 for fast, standardized installation.
  • Polyamide Insulation: Flame-retardant polyamide housing rated UL94 V-0 for added fire safety in panel environments, available in Grey and Red for easy circuit identification.
  • High Short-Circuit Withstand: Rated short-time withstand current (Icw) of 480 A for 1 s, with a short-circuit current rating (SCCR) of 100 kA.
  • Wide Operating Temperature Range: Rated for operation and storage from -55°C to +110°C.
  • High Dielectric Strength: 2200 V dielectric test voltage and 8000 V rated impulse withstand voltage (Uimp) for reliable insulation performance.

Certifications & Compliance

  • CB Certified Conductor Connection (4 mm² / 12 AWG)
  • UL94 V-0 Flame Rated Polyamide Insulation
  • RoHS Compliant per EU Directive 2002/95/EC
  • IP20 Degree of Protection (Main Terminals) per IEC 60529, IEC 60947-1, EN 60529
  • Vibration Resistant per IEC 60068-2-6

Technical Specifications

  • Voltage Rating: 1000V
  • Flammability According to UL94: V-0
  • Object Classification Code: X
  • Pollution Degree: 3
  • Power Loss: 1 W
  • Number of Levels: 1
  • Available Housing Colors: Grey, Red

Typical Applications

  • Solar and Photovoltaic (PV) Power Systems
  • DIN Rail Terminal Blocks in Control Panels
  • Industrial Control and Automation Wiring
  • Renewable Energy and Power Distribution Systems
  • Panelboard and Switchgear Terminal Connections

Why ABB?

ABB backs the ZS4-D2-S-T2 terminal block family with CB-certified conductor connections, UL94 V-0 flame-rated polyamide insulation, and a 1000 V AC/DC rating built for demanding solar and industrial environments. With high dielectric strength, a 100 kA SCCR, and standardized DIN rail mounting, this terminal block delivers the reliable, code-compliant performance professionals expect from ABB electrical components, whether you choose the Grey or Red housing color for your panel.

Manufacturer Resources

Product Specs

Product Type:
Terminal Block
Connection Type:
Screw Clamp
Voltage Rating:
1000V
Configuration:
Double Deck
Product Material:
Polyamide
Department:
Electrical
Product Group:
Wire Connectors & Terminals
Listing:
UL94 V-0
Product Subgroup:
Terminal Blocks & Strips

ABB 1SNK505062R0000 – Frequently Asked Questions

1) What wire size can the ABB ZS4-D2-S-T2 terminal block accept?
The ZS4-D2-S-T2 takes conductors up to 4 mm2, which is 12 AWG, on a CB certified connection without an insulated ferrule. That capacity sits in only 5.2 mm (0.205 in) of rail width per block, which is the point of the double deck design: two connection levels stacked in the footprint a single deck block would normally use. If you are running ferruled conductors, the 4 mm2 figure is stated for the bare conductor case.
2) Is this ABB terminal block rated for 1000V solar PV string wiring?
Yes. The ZS4-D2-S-T2 is rated 1000 V AC/DC per IEC, which is why ABB positions it for solar and photovoltaic work as well as general industrial control panels. Supporting that rating: 2200 V dielectric test voltage, 8000 V rated impulse withstand (Uimp), and pollution degree 3.
3) What is the short circuit rating on this terminal block?
The ZS4-D2-S-T2 carries a 100 kA SCCR and a rated short-time withstand current (Icw) of 480 A for 1 second. For panel builders documenting assembly SCCR, the block is not the limiting component in most control panel builds at that number.
4) Will this ABB block hold up in an unconditioned outdoor PV combiner or a hot equipment room?
Operating and storage range is -55 C to +110 C, and the block is vibration resistant per IEC 60068-2-6. Housing is polyamide rated UL94 V-0 for flame retardance. Protection degree at the main terminals is IP20 per IEC 60529, so the block itself is finger-safe but not weatherproof, it needs to live inside a rated enclosure.
5) What is the difference between the ABB ZS4-D2-S-T2 terminal block and the Eaton XBT XB Series wide feed through block?
Both are DIN rail style IEC terminal blocks, but they differ in deck arrangement and voltage class. The ABB ZS4-D2-S-T2 is a double deck screw clamp block rated 1000V, stacking two circuits in one footprint for panel space savings. The Eaton XB Series unit is a wide feed through terminal block rated 800V, a single-level straight-through connection. Choose the ABB double deck where circuit density matters in a crowded enclosure and the 1000V class is required, such as PV string wiring; choose the single-level Eaton where each terminal position needs to stay one circuit for straightforward landing and troubleshooting.
6) Can I use a Square D GV1G09 terminal block instead of the ABB ZS4-D2-S-T2 for general panel wiring?
They are not interchangeable. The Square D GV1G09 is a TeSys GV2 top feed terminal block, a 3-pole 63A/690V power distribution accessory that mounts to TeSys D and TeSys U motor starters to feed them from the top. The ABB ZS4-D2-S-T2 is a general purpose double deck screw clamp terminal block rated 1000V for landing field conductors on a DIN rail. If you are distributing power to a group of TeSys starters, the Square D part is the right piece; if you are terminating control or PV conductors in a panel, use the ABB block.
7) For a 1000V solar combiner panel, which of these terminal blocks should I specify?
The ABB ZS4-D2-S-T2 is the one rated for that duty. It carries a 1000V AC/DC rating and a flame-retardant polyamide housing, and is built as a double deck screw clamp block for DIN rail panels. Of the alternatives, the Eaton XB Series wide feed through block is rated 800V and the Square D TeSys GV2 top feed block is a 690V motor starter accessory, so neither reaches the 1000V class typical of PV string work.
8) What DIN rail does the ZS4-D2-S-T2 mount on?
It snaps onto standard TH35-7.5 (35 x 7.5 mm) and TH35-15 (35 x 15 mm) rail per IEC 60715. That is the common 35 mm top hat rail already in most control panels, so no special rail or adapter is needed.
9) What screwdriver do I need to land wires in this ABB screw clamp block?
A 3.5 mm blade is the recommended size for the ZS4-D2-S-T2, gauge type A3-B3. It is a screw clamp connection, not push-in or spring cage, so each conductor gets torqued down individually.
10) What colors does the ZS4-D2-S-T2 come in, and does the color change anything electrically?
Two colors: grey (1SNK508410R0000) and red (1SNK505062R0000). The color is for circuit identification in the panel, commonly grey for general feed-through and red to flag a live or special circuit. The electrical ratings and the 4 mm2 (12 AWG) connection are the same on both.
11) What else could I use if I need a higher current feed-through block instead of this 4 mm2 ABB?
The Eaton XBT XB Series IEC terminal block is a wide feed-through rated 800V, a single deck alternative when you need a wider conductor path more than you need stacked decks. If the terminal block is going on a motor starter rather than a rail, the Square D TeSys GV2 top feed terminal block is a 3-pole 63A/690V unit for TeSys D and TeSys U starters, a different job entirely. Note both are below the ZS4-D2-S-T2's 1000 V rating, so neither is a substitute on a 1000 V PV string.
12) Is the Eaton 10250T pushbutton terminal block a substitute for the ABB ZS4-D2-S-T2?
No. The Eaton 10250TA62 is a terminal block for 30.5mm heavy-duty pushbuttons in the 10250T series, meaning it attaches to a panel-mounted operator to land its wiring. The ABB ZS4-D2-S-T2 is a DIN rail double deck screw clamp block for terminating conductors inside the enclosure. They serve different points in the same control circuit and are often used together rather than in place of one another.
13) Is the ZS4-D2-S-T2 RoHS compliant for a spec that requires it?
Yes, it is RoHS compliant per EU Directive 2002/95/EC. Also on record: CB certified conductor connection at 4 mm2 (12 AWG) and UL94 V-0 flammability classification on the polyamide insulation.
14) Can I use this ABB block on a pushbutton or operator station instead of a DIN rail?
No. The ZS4-D2-S-T2 is a DIN rail mounted block for TH35 rail. For a 30.5 mm pushbutton station the terminal block is part of the operator assembly, and the Eaton 10250T Series heavy-duty pushbutton terminal block is the part built for that mounting.
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Does the ABB 1SNK505062R0000 come with a warranty?
Absolutely. The ABB 1SNK505062R0000 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the ABB 1SNK505062R0000?
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