✅ Tool-free spring clamp connection – saves up to 60% wiring time
✅ Compact modular design for dense cabinet layouts
✅ Vibration-proof, no re-tightening required
✅ 2.5–10 mm² / 24–800 V / Feed-through & PE grounding versions
✅ Compatible with Phoenix / Weidmüller equivalents
The AOSI ST Series Spring-Type DIN Rail Terminal Blocks feature compact design, maintenance-free spring
connections, and high vibration resistance.Each terminal provides stable contact without screw tightening —
ensuring reliability in industrial automation, control panels, and power distribution systems.
The range covers multiple variants: Standard, Multi-Layer, Twin, and Quattro models — all compatible with
universal 35mm DIN rails.Housings are made of flame-retardant PA66 UL94V-0 material, with copper alloy
conductors.Optional PE grounding and HESI isolation versions meet diverse wiring needs in automation control and
renewable energy systems.
Особенности:
Сайт ST standard series supports conductor sizes from 0.2 to 10mm². Each terminal provides a firm, maintenance-free spring clamp connection.
Made of PA66 UL94V-0 flame-retardant housing and copper conductive parts, ensuring reliable long-term performance.
| Модель | Диапазон проводов | Номинальный ток | Rated Voltage |
|---|---|---|---|
| ST2.5 | 0.2–2.5mm² | 20A | 600V |
| ST4 | 0.2–4mm² | 32A | 800V |
| ST6 | 0.2–6mm² | 50A | 600V |
| ST10 | 0.2–10mm² | 65A | 600V |
Each model in the ST series is designed to meet different wiring capacity requirements.
ST2.5 is ideal for small control circuits, while ST4 and ST6 offer higher current handling for power distribution системы.
Сайт ST10 model provides maximum wire capacity up to 10 mm², making it suitable for heavy-duty industrial applications.
All models feature reliable spring clamp technology for vibration-resistant и maintenance-free connections.
The Multi-Layer series includes dual-layer (STTB2.5) and triple-layer (ST2.5-3L) terminals for compact control cabinets.
Each layer is independently connected, supporting multi-signal wiring and saving rail space.
Product Attribute Overview：
| Модель | Layer Type | Диапазон проводов | Номинальный ток | Rated Voltage | Features |
|---|---|---|---|---|---|
| STTB2.5 | Dual-layer | 0.2–2.5mm² | 20A | 300V | Two independent circuits in one block; ideal for compact panels |
| ST2.5-3L | Triple-layer | 0.2–2.5mm² | 28A | 500V | Three separate connection levels for multi-signal distribution |
Сайт ST Multi-Layer series offers high wiring density within limited panel space.
Each layer is fully independent, allowing separate signal or power connections while maintaining clear
organization.
With the same reliable spring clamp mechanism and flame-retardant PA66 housing as the standard ST series,
these terminals ensure durable and vibration-resistant performance in industrial environments.
Two conductors can be inserted at the same point for parallel or loop connections — ideal for multi-signal distribution.
This twin design improves wiring flexibility and reduces the need for additional jumper bridges, making installation more efficient and space-saving.
The Quattro model provides up to four connection points within one terminal, saving space and simplifying parallel wiring.
| Модель | Диапазон проводов | Номинальный ток | Rated Voltage | Features |
|---|---|---|---|---|
| ST2.5-QUATTRO | 0.2–2.5mm² | 20A | 800V | 4-in-1 design for parallel or loop wiring; compact, space-saving structure |
| ST4-QUATTRO | 0.2–4mm² | 32A | 800V | High-density terminal for multi-signal distribution; ideal for compact control panels |
Product Advantages:
Functional Safety and Grounding Reliability
Ground terminal blocks provide a secure, low-resistance path to discharge fault
current, protecting both equipment and personnel.
Сайт ST-PE series connects automatically to the DIN rail, ensuring stable and maintenance-free grounding
without the need for additional accessories.
System Performance and Compliance
By providing consistent protective earthing, the ST-PE series helps reduce electromagnetic interference and stabilize overall system performance. All models are designed and tested in compliance with international installation standards such as IEC and UL, guaranteeing reliable operation in industrial environments.
ST-PE Parameter Details:
| Модель | Диапазон проводов | Номинальный ток | Rated Voltage | Rail Type | Notes |
|---|---|---|---|---|---|
| ST2.5-PE | 0.2–2.5mm² | 20A | 600V | TS35 | PE foot bonds to rail; compact PE for small circuits |
| ST4-PE | 0.2–4mm² | 32A | 800V | TS35 | For medium-current grounding |
| ST6-PE | 0.2–6mm² | 50A | 600V | TS35 | Suited to power distribution grounding |
| STTB2.5-PE | 0.2–2.5mm² | 20A | 300V | TS35 | Dual-layer PE for stacked wiring, saves rail space |
| ST2.5-TWIN-PE | 0.2–2.5mm² | 24A | 800V | TS35 | Twin PE: two conductors in one point |
| ST2.5-QUATTRO-PE | 0.2–2.5mm² | 20A | 800V | TS35 | Quattro PE: four conductors in one terminal |
Fuse-type terminal blocks integrate circuit protection and isolation functions within a compact modular design.
By combining a fuse holder into the base of a standard Клеммный блок для DIN-рейки, the ST-HESI series allows both power
distribution and circuit protection in one unit.
It not only enables fast fuse replacement but also simplifies wiring and ensures safe circuit separation during
maintenance.
When to Use a Fuse Terminal Block?
Typical Variations
Product Features
To ensure safe, standardized, and efficient wiring installation, the ST series terminal blocks can be matched with a full range of compatible accessories.
These accessories simplify panel wiring, improve identification, enhance grounding safety, and ensure consistent installation quality.
Accessory Display
| Аксессуар | Описание | Compatible Models |
|---|---|---|
| FBS Series – Connecting Bridge | Electrically bridges multiple terminal blocks for common potential distribution. Available in 2/3/4/5/10 poles. | ST2.5 / ST4 / ST6 / ST10 / STTB2.5 / ST2.5-TWIN / ST2.5-QUATTRO |
| ZB Marking Strip | Standard snap-on marking strip for clear terminal identification; customizable with printed numbers. | ST Series terminals, HESI, PE series |
| ZBFM5 / ZB10 – Marker Tags | Compact single-position tags for marking individual terminals or small groups. | ST2.5 / ST4 / ST6 / ST10 |
| UK-B2 / UK-B1 – Marking Base | Holds label plates or printed name tags; provides a clean labeling surface in control cabinets. | All ST terminals mounted on DIN rail |
| D Series – End Plates (D-ST2.5 / D-ST4 / D-ST6 / D-ST10) | Close the open sides of terminal blocks to ensure insulation and protection; available for single, twin, and multi-layer models. | ST2.5 / ST4 / ST6 / ST10 / STTB2.5 / ST2.5-TWIN / ST2.5-3L |
| Guide Rail (TS35 / G-type) | Standard 35 mm DIN rail for mounting all terminal blocks, made of steel or aluminum. | Universal |
| USLKG2.5 / USLKG4 – Ground Terminal | Provides secure PE grounding on the DIN rail; yellow-green color for visual identification. | ST Series, compatible with same wire range |
| Cold-Pressed Ferrules | Protect stranded wires from damage and ensure reliable screw or spring connections. | Universal |
| Nylon Cable Ties | Used for neat wire bundling inside panels and junction boxes. | Universal |
Accessory Highlights
Compatibility Note
Explore more AOSI connection solutions that complement the Spring-Cage Type Terminal Blocks:
AOSI ST Series terminal blocks are widely used in industrial automation, control panels, power distribution systems, and renewable energy equipment.
Their compact spring structure ensures stable, maintenance-free wiring even under vibration, temperature changes, or confined installation spaces.
Сайт ST push-in terminal block allows tool-free wire insertion for solid or ferruled conductors.
Its spring clamp design ensures quick connection, vibration resistance, and long-term reliability.
Follow the steps below to complete installation safely and efficiently.
Step 1 – Prepare the Wire
Action:
Prepare the conductor, terminal block, and screwdriver for installation.
💡 Наконечник: Ensure the terminal block is mounted securely on the DIN rail before wiring.
Step 2 – Open the Clamp
Action:
Insert the screwdriver into the square operating hole of the terminal block to open the spring clamp.
💡 Наконечник: The spring clamp will expand automatically once the screwdriver is pressed in.
Step 3 – Insert the Wire
Action:
Insert the prepared wire straight into the round hole of the terminal while holding the screwdriver in place.
💡 Наконечник: Make sure the wire is fully inserted to ensure reliable contact.
Step 4 – Complete the Wiring
Action:
Remove the screwdriver — the spring clamp will automatically close and secure the conductor in place.
💡 Наконечник:Gently pull the wire to confirm it’s firmly connected.
✅ Installation Complete
Ваш ST Push-in DIN Rail Terminal Block is now securely wired and ready for use in control, signal, or power distribution circuits.
From plastic injection and metal stamping to assembly and testing — all production steps are completed in-house.
This ensures stable quality, faster delivery, and flexible customization according to your project needs.
AOSI terminal blocks meet international standards such as UL, CE, VDE, RoHS, and CQC.
Each product undergoes 100% inspection for contact pressure, dielectric strength, and thermal endurance.
With 10+ years of export experience, AOSI delivers to over 30 countries across Asia, Europe, and the Americas.
We provide fast quotation, stable logistics, and technical support to help you keep projects on schedule.
AOSI supports OEM/ODM with flexible color, pitch, and logo customization.
Our R&D team ensures compatibility and performance that align with your application requirements.
AOSI has built long-term partnerships with automation, energy, and control system integrators worldwide.
Our terminals are widely applied in industrial automation, power distribution, and renewable energy systems.
We provide samples for free, you just need to tell us what you need
A spring-clamp terminal that lets you insert solid or ferruled stranded wires directly—tool-free—on a 35 mm DIN rail.
Solid conductors and ferruled fine-stranded wires push in directly. Non-ferruled stranded wires can be inserted by pressing the orange actuator.
Yes—TS35 DIN rail, ZB marking strips, FBS jumper bridges, end plates (D-series), and PE grounding versions.
Housing is PA66 UL94V-0; conductive parts are copper alloy. Operating temp typically −40 °C to +105 °C (check datasheet for your model).
Models are designed to comply with global standards such as UL/CE/RoHS; specific certificates depend on the model—ask us for the files.
Faster wiring, consistent contact force, vibration-resistant, and essentially maintenance-free (no re-tightening).
Typical models: ST2.5 (0.2–2.5 mm² / 24 A), ST4 (0.5–4 mm² / 32 A), ST6 (0.5–6 mm² / 41 A), ST10 (0.75–10 mm² / 57 A).
Yes, as long as the pitch/series matches; many users mix signal (ST), PE ground (ST-PE), twin/quattro, and multi-layer units on one rail.
Press the orange actuator downward with a screwdriver and pull the conductor out gently.
Common models are stocked (small MOQ available). Custom colors/logo or special pitches are made-to-order; typical lead time 7–15 working days.
В течение 24 часов
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