TB 4 EI Essential Series Terminal Block Supplier
Product Introduction
The TB 4 EI Essential Series Terminal Block is a robust, high-performance wiring solution designed for secure electrical connections in industrial control panels, power distribution boards, and automation systems. Engineered using premium-grade polyamide, the TB 4 EI series ensures excellent electrical conductivity, mechanical strength, and long-term reliability. Its compact DIN-rail–mountable design, combined with multiple colour options, makes it ideal for organized wiring, phase identification, and streamlined panel assembly. United Machinery is trusted by industries for suppling of high-quality TB 4 EI Essential Series Terminal Block West Bengal, Bihar, Odisha, Chhattisgarh, Jharkhand, Maharashtra, Rajasthan, Haryana, Madhya Pradesh, Gujarat, Assam, Tripura, Andhra Pradesh, Meghalaya, Karnataka, Manipur, Tamil Nadu, Hyderabad, Saudi Arabia & UAE with fast delivery, expert assistance, and unbeatable value. Whether used in machinery, automation, or building electrical systems, the TB 4 EI series delivers consistent performance even in demanding environments.
Where You Can Use TB 4 EI Terminal Blocks
The TB 4 EI Essential Series is suitable for a wide range of applications, including:
- Industrial control panels
- Motor control centers (MCC)
- Power distribution boards
- Machine automation systems
- HVAC & building management systems
- PLC input/output panels
- Solar & renewable energy panels
- Instrumentation & process control panels
- Electrical junction and interface boxes
Benefits of Using TB 4 EI Terminal Blocks
- Higher Current Capacity
Supports up to 4 mm² conductors, ideal for higher load circuits and medium-power wiring. - Safe & Secure Connections
Vibration-resistant clamping ensures stable performance in industrial environments. - Colour-Coded Models
Reduces wiring errors, improves troubleshooting speed, and enhances circuit identification. - Space-Efficient DIN Rail Mounting
Allows neat and structured wiring layouts, saving assembly time. - Durable PA66 Body
High insulation strength, heat resistance, and flame-retardant properties. - Easy Marking System
Clear marking slots for simple circuit labeling and maintenance documentation.
Technical Chart
Parameter | Typical Specification |
Conductor Size | 0.5–4 mm² (solid/stranded) |
Rated Current | 32 A (approx.) |
Rated Voltage | 600–800 V (depending on model) |
Insulation Material | PA66, flame-retardant |
Connection Type | Screw clamp |
Strip Length | 9–11 mm |
Mounting | DIN Rail (TS35) |
Operating Temperature | -40°C to +105°C |
Flammability Rating | UL 94 V-0 (typical) |
Colour Options | Natural, RD, YE, BK, BU, GN |
Detailed Types of TB 4 EI Essential Series Terminal Blocks
TB 4 EI – 3246023 (Standard Grey/Natural)
This is the standard universal terminal block widely used in control panels and distribution boards.
It provides excellent mechanical strength, reliable screw clamping, and high insulation properties.
Ideal for general-purpose power and control wiring up to 4 mm² conductors.
TB 4 EI RD (Red) – 3000855
The red colour variant is commonly used for:
- Phase identification (R-Phase)
- Positive DC circuits
- Emergency or safety circuits
Its bright colour improves visibility and ensures fast troubleshooting during maintenance.
TB 4 EI YE (Yellow) – 3000856
The yellow model is typically used for:
- Special control signals
- Interlock circuits
- Warning or caution-related wiring
It helps separate sensitive circuits from the main power lines.
TB 4 EI BK (Black) – 3000857
Black colour terminal blocks are preferred for:
- AC power lines
- Auxiliary power circuits
- Industrial automation wiring
Black terminals offer a professional look and are typically used to group power-related circuits.
TB 4 EI BU (Blue) – 3246722
Blue terminal blocks are the industry standard for:
- Neutral (N) wiring
- Return paths in control circuits
- Instrumentation reference points
The colour coding helps electricians quickly identify neutral lines inside dense wiring panels.
TB 4 EI GN (Green) – 3246723
Green variants are primarily used for:
- Earth / Ground (PE) connections
- Protective earth return paths
- Safety grounding circuits
These variants make it easy to organize wiring by phase, signal type, safety circuits, or application.
We Supply Across India and International
- West Bengal
- Bihar
- Odisha
- Chhattisgarh
- Jharkhand:Ranchi
- Maharashtra:Mumbai, Pune, Nagpur, Aurangabad
- Rajasthan:Jaipur
- Haryana:Faridabad
- Madhya Pradesh:Bhopal, Indore
- Gujarat:Ahmedabad, Surat, Vadodara
- Assam
- Tripura:Agartala
- Andhra Pradesh:Visakhapatnam
- Meghalaya
- Karnataka:Bengaluru
- Manipur:Imphal
- Tamil Nadu:Chennai, Coimbatore
- Hyderabad
- International Supply:
- Saudi Arabia:Al Jubail, Jeddah, Riyadh, Al Khobar
- UAE:Abu Dhabi, Dubai, Ruwais, Umm Al Quwain
Why United Machinery is the Preferred Supplier in India, Saudi Arabia & UAE
- Wide Distribution Networkcovering major Indian states and international deliveries.
- Assured Genuine Productswith verified part numbers and guaranteed quality.
- Strong Technical Expertisehelping customers select the right terminal block for their panel requirement.
- Bulk Stock Availabilityensures quicker dispatch and reduced delivery time.
- Competitive Pricingfor OEMs, panel builders, contractors, and industrial clients.
- Reliable After-Sales Supportfor technical issues, replacements, and product guidance.
Spring-cage protective conductor terminal block, number of connections: 2, connection method: Spring-cage connection, Rated cross section: 2.5 mm2, cross section: 0.08 mm2 – 4 mm2, mounting type: NS 35/7,5, NS 35/15, color: green-yellow
Applications & Use-Cases
Where the ST 2.5 series spring terminal blocks shine:
- Control panels and switchgear: For signal and power wiring where frequent servicing might occur and you need fast reliable wiring.
- Automation and machine building: When machines operate in high-vibration environments (for example conveyors, motors) and screw terminals may loosen — spring terminals maintain contact.
- Process plants / instrumentation: Because of reliability in harsh environments and guarantee of consistent contact pressure.
- Feed-through and compact designs: The ST/ STTB versions offer double-level options, twin feed-through, and compact width for space-savings in dense panel layouts.
- Grounding and protective conductor (PE) sections: The STTB 2.5-PE / PE/N versions provide dedicated protective conductor terminals with spring connection.
Service Locations
- West Bengal
- Bihar
- Odisha
- Chhattisgarh
- Jharkhand:Ranchi
- Maharashtra:Mumbai, Pune, Nagpur, Aurangabad
- Rajasthan:Jaipur
- Haryana:Faridabad
- Madhya Pradesh:Bhopal, Indore
- Gujarat:Ahmedabad, Surat, Vadodara
- Assam
- Tripura:Agartala
- Andhra Pradesh:Visakhapatnam
- Meghalaya
- Karnataka:Bengaluru
- Manipur:Imphal
- Tamil Nadu:Chennai, Coimbatore
- Hyderabad
- International Supply:
- Saudi Arabia:Al Jubail, Jeddah, Riyadh, Al Khobar
- UAE:Abu Dhabi, Dubai, Ruwais, Umm Al Quwain
Why United Machinery is Your Best Supplier for ST 2.5 Spring Terminal Blocks
- Genuine Phoenix Contact parts: We guarantee authentic Phoenix Contact ST 2.5 series components, avoiding knock-offs or grey market.
- Wide regional coverage: Serving all major states in India (West Bengal, Bihar, Odisha, Chhattisgarh, Jharkhand, Maharashtra, Rajasthan, Haryana, Madhya Pradesh, Gujarat, Assam, Tripura, Andhra Pradesh, Meghalaya, Karnataka, Manipur, Tamil Nadu, Hyderabad) plus the Middle East (Saudi Arabia: Al Jubail, Jeddah, Riyadh, Al Khobar; UAE: Abu Dhabi, Dubai, Ruwais, Umm Al Quwain).
- Technical support: Our team can advise which variant of ST 2.5 series fits your panel layout, wire size, current/voltage requirement, and whether you need standard feed-through or protective conductor type.
- Stock and logistics: We maintain stock and offer prompt shipping across India + GCC, facilitating quick turnaround.
- Bulk & project supply capability: Whether you’re ordering for a machine build, automation OEM or MRO, we handle volume and provide competitive pricing.
- Documentation & compliance: We can supply datasheets, certificates of conformity, part number cross-references, ensuring your purchase meets audit and project requirements.
