You may also like
ABB ZS4-T3 Feed-Through Screw Clamp Terminal Block, Grey (1SNK5 Series)
The ABB ZS4-T3 is a space-saving feed-through screw clamp terminal block from the 1SNK5 series, engineered to connect conductors up to 4 mm² (12 AWG, without insulated ferrule, CB certified) in a compact 5.2 mm (0.205 in) spacing. Rated 1000 V AC/DC per IEC, this Grey terminal block is perfectly adapted to solar and photovoltaic applications as well as general industrial control wiring where reliable, code-compliant connections are required.
Key Features
- Connection Type: Screw Clamp terminals accept conductors up to 4 mm² (12 AWG) without an insulated ferrule, CB certified for dependable termination.
- Compact Footprint: Just 5.2 mm (0.205 in) of spacing per pole helps save panel and enclosure space.
- Rated Voltage (Ur): 1000 V, suitable for demanding solar/PV and industrial power distribution applications per IEC.
- Short-Circuit Current Rating (SCCR): 100 kA for robust fault-current performance.
- Dielectric Strength: 2200 V dielectric test voltage and 8000 V Rated Impulse Withstand Voltage (Uimp).
- Insulation Material: Polyamide construction with UL94 V-0 flammability rating.
- Degree of Protection: Main Terminals IP20 per IEC 60529, IEC 60947-1, and EN 60529.
- DIN Rail Mounting: Mounts on TH35-7.5 (35 x 7.5 mm) or TH35-15 (35 x 15 mm) rail per IEC 60715.
- Finish: Grey color for easy circuit identification.
- Ambient Temperature: Rated for operation and storage from -55°C to +110°C.
Certifications & Compliance
- CB Certified
- UL94 V-0 Flammability Rating
- Compliant with IEC 60529, IEC 60947-1, and EN 60529
- RoHS Compliant per EU Directive 2002/95/EC (August 18, 2005) and amendment
- Resistance to Vibrations Compliant per IEC 60068-2-6
Technical Specifications
- Flammability According to UL94: V-0
- Object Classification Code: X
- Pollution Degree: 3
- Number of Levels: 1
- Connection Type: Screw Clamp
- Rated Voltage (Ur): 1000 V
- Color: Grey
- Insulation Material: Polyamide
Typical Applications
- Solar and Photovoltaic (PV) Installations
- Industrial Control Panels and Cabinets
- Feed-Through Terminal Block Wiring Systems
- DIN Rail Mounted Distribution Assemblies
- Renewable Energy and Power Distribution Systems
Why ABB?
ABB engineers the ZS4-T3 terminal block with CB-certified screw clamp connections, high-temperature Polyamide insulation, and a UL94 V-0 flammability rating to deliver reliable, code-compliant performance in demanding solar and industrial environments. With a 1000 V rating, 100 kA SCCR, and RoHS-compliant construction, this Grey feed-through terminal block is built for durable, space-saving panel wiring you can trust.
Manufacturer Resources
Product Specs
- Product Type:
- Terminal Block
- Product Material:
- Polyamide
- Connection Type:
- Screw Clamp
- Voltage Rating:
- 1000V
- Configuration:
- Feed-Through
- Series:
- 1SNK5
- Department:
- Electrical
- Product Group:
- Wire Connectors & Terminals
- Product Subgroup:
- Terminal Blocks & Strips
ABB 1SNK505020R0000 – Frequently Asked Questions
1) What wire size will the ABB ZS4-T3 terminal block accept?
The ZS4-T3 takes conductors up to 4 mm2, which is 12 AWG, landed without an insulated ferrule (CB certified for that termination). It is a screw clamp connection, so stranded wire seats directly under the clamp. If you are running anything heavier than 12 AWG, this is the wrong block for that circuit.
2) Will the ABB ZS4-T3 mount on the DIN rail already in my enclosure?
It mounts on TH35-7.5 (35 x 7.5 mm) or TH35-15 (35 x 15 mm) rail per IEC 60715. Those are the two standard 35 mm top-hat profiles found in most industrial panels, so existing rail almost always works. It will not clip to G-rail or a 15 mm mini rail.
3) Is the ABB ZS4-T3 rated for solar PV string wiring?
Yes. Rated voltage is 1000 V AC/DC per IEC with an 8000 V rated impulse withstand (Uimp) and a 2200 V dielectric test voltage, which is why ABB calls it out for solar and photovoltaic work alongside general industrial control wiring. Short-circuit current rating is 100 kA.
4) Can the ABB ZS4-T3 handle a high-temperature panel or an outdoor PV combiner?
Operating and storage range is -55 C to +110 C, which covers rooftop combiner boxes and unconditioned plant rooms. The body is polyamide with a UL94 V-0 flammability rating, and it is compliant with IEC 60068-2-6 for vibration resistance. Protection at the main terminals is IP20 per IEC 60529, so it needs to live inside an enclosure, not on open air.
5) What is the closest alternative to the ABB ZS4-T3 terminal block for feed-through panel wiring?
The Eaton XBT XB Series IEC terminal block is the nearest feed-through alternative, rated 800V and described as a wide feed-through design. The ABB ZS4-T3 is also a feed-through configuration but carries a 1000V rating and uses screw clamp connection, so if the panel drawing calls for 1000V on solar or PV circuits, stay with the ZS4-T3; for 800V IEC control wiring the Eaton XB is a workable swap.
6) What colors does the ABB ZS4-T3 terminal block come in?
Two: Grey (part 1SNK512010R0000) and Blue (part 1SNK505020R0000). The usual panel convention is grey for general power and phase conductors and blue for neutral or DC negative, which lets you identify circuits at a glance without extra marking.
7) What is the difference between a feed-through terminal block like the ZS4-T3 and a motor-starter feed terminal block?
The ZS4-T3 is a single-level feed-through block: one conductor in, one out, no switching or protection, used to land and distribute field wiring on a DIN rail. That is a different job from a power-distribution block like the Square D TeSys GV2 top feed terminal block, which is a 3-pole 63A/690V unit built to feed TeSys D and TeSys U starters. If you are branching supply to multiple motor starters, the GV2 block is the right type; if you are terminating field wiring in a control panel, the ZS4-T3 is.
8) What is another IEC feed-through terminal block if I need a wider block than the ABB ZS4-T3?
The Eaton XBT XB Series IEC terminal block is an 800V wide feed-through unit, so it is the wider-body option when the ZS4-T3's 5.2 mm pitch is too tight for the conductor you are landing. Trade-off is voltage: the Eaton is listed at 800V against 1000V on the ZS4-T3, so it is not a drop-in for a 1000 V PV string.
9) Is the Eaton 10250TA62 a substitute for the ABB ZS4-T3?
It is not. The Eaton 10250TA62 belongs to the 10250T heavy-duty pushbutton line and is a terminal block for 30.5mm pushbutton and operator devices mounted through a panel door. The ABB ZS4-T3 is a DIN rail mounted feed-through block on TH35-7.5 or TH35-15 rail for in-panel conductor terminations. If you are wiring a pilot device, the Eaton part is the right family; if you are landing conductors on a rail, it is not.
10) Which terminal block should I specify for a 690V motor starter feed instead of the ABB ZS4-T3?
For feeding a TeSys D or TeSys U starter, the Square D GV1G09 TeSys GV2 top feed terminal block is purpose-built for that job at 3-pole, 63A, 690V. The ABB ZS4-T3 is a 1000V screw clamp feed-through block for individual conductor terminations and is not a starter power feed accessory.
11) Is the ABB ZS4-T3 RoHS compliant for a spec-driven job?
It is RoHS compliant per EU Directive 2002/95/EC and its amendment, CB certified, and built to IEC 60947-1, IEC 60529 and EN 60529. Pollution degree is 3, which suits industrial environments with conductive dust or condensation rather than clean-room-only installs.
12) I need color-coded blocks for neutral runs - does the ABB ZS4-T3 cover that, or do I need a different brand?
No need to switch brands. The ZS4-T3 feed-through block is stocked in both Grey and Blue, so you can color-code neutral or common circuits within the same 1SNK5 family and keep one screw clamp termination style across the panel. Neither the Eaton XB Series nor the Square D TeSys GV2 blocks in the comparable range are offered as a matched color pair for that purpose.
How fast can I get the ABB 1SNK505020R0000 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the ABB 1SNK505020R0000 come with a warranty?
Absolutely. The ABB 1SNK505020R0000 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 1SNK505020R0000?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the ABB 1SNK505020R0000 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.