Phoenix ST 4 Series Industrial Terminal Blocks Product Selection Guide
In industrial medium-low power control, multi-channel signal collection, and circuit status monitoring scenarios, Phoenix ST 4 series terminal blocks are widely used for their rich functional configuration, 4mm² wire compatibility, and reliable industrial-grade performance. This guide sorts out the product codes, models, and detailed descriptions of the series to help you quickly select suitable terminal blocks for 4mm² circuit connection requirements.
1. Core Model List (With Product Descriptions)
| Product Code | Product Model | Product Description |
|---|---|---|
| Basic & Color-coded Models | ||
| 3031364 | ST 4 | ST 4 series basic terminal block, compatible with 4mm² wires, cost-effective for general medium-low power circuit connection (e.g., control panel wiring, motor auxiliary circuits) |
| 3031377 | ST 4 BU | ST 4 series terminal block, blue (BU) appearance, facilitating identification of control/signal circuits in 4mm² mixed wiring systems |
| 3037135 | ST 4 OG | ST 4 series terminal block, orange (OG) appearance, dedicated to marking alarm, emergency stop, or fault signal circuits in 4mm² systems |
| Multi-circuit Configuration Models (TWIN/QUATTRO) | ||
| Double-circuit (TWIN) Models | ||
| 3031393 | ST 4-TWIN | ST 4 series double-circuit terminal block, integrating two 4mm² circuits in one unit, saving 50% of control cabinet installation space, suitable for dual-circuit parallel wiring |
| 3031403 | ST 4-TWIN BU | ST 4 series double-circuit terminal block, blue appearance, convenient for identifying dual-circuit control signal groups in 4mm² systems |
| 3037355 | ST 4-TWIN OG | ST 4 series double-circuit terminal block, orange appearance, used for marking dual-circuit alarm signal groups in 4mm² systems |
| 3031416 | ST 4-TWIN-PE | ST 4 series double-circuit terminal block with PE protective grounding function, enhancing electrical safety of dual 4mm² medium-low power circuits |
| Four-circuit (QUATTRO) Models | ||
| 3031445 | ST 4-QUATTRO | ST 4 series four-circuit terminal block, compact design, suitable for high-density 4mm² multi-channel signal circuit wiring (e.g., multi-sensor signal collection) |
| 3031458 | ST 4-QUATTRO BU | ST 4 series four-circuit terminal block, blue appearance, facilitating identification of four-channel control signal groups in 4mm² systems |
| 3031461 | ST 4-QUATTRO-PE | ST 4 series four-circuit terminal block with PE grounding function, ensuring safety of 4mm² multi-channel signal circuit systems |
| 3037782 | ST 4-QUATTRO-DIO 1N 5408/L-R | ST 4 series four-circuit terminal block with 1N 5408 diode protection (L-R direction), preventing reverse current damage to inductive loads in 4mm² multi-channel circuits |
| 3037795 | ST 4-QUATTRO-DIO 1N 5408/R-L | ST 4 series four-circuit terminal block with 1N 5408 diode protection (R-L direction), reverse current protection for 4mm² multi-channel circuits in opposite direction |
| 3042845 | ST 4-QUATTRO/2P | ST 4 series four-circuit terminal block with 2P dual-circuit derived function, suitable for 4mm² multi-channel circuit shunting |
| Derived Circuit Models (/1P/2P) | ||
| 3042719 | ST 4/1P | ST 4 series terminal block with 1P single-circuit derived function, realizing one-input one-output branch wiring for 4mm² circuits |
| 3042735 | ST 4/2P | ST 4 series terminal block with 2P dual-circuit derived function, suitable for one-input two-output branch wiring of 4mm² circuits (e.g., signal distribution) |
| Status Monitoring Models (HESI/HESILED/HESILA) | ||
| Basic Indicator (HESI) Models | ||
| 3036369 | ST 4-HESI (5X20) | ST 4 series terminal block with basic HESI indicator (5×20 size), cost-effective status monitoring for 4mm² general circuits |
| 3039887 | ST 4-HESI (5X20) BU | ST 4 series terminal block with HESI indicator (5×20 size) + blue appearance, suitable for status monitoring of 4mm² control signal circuits |
| 3039890 | ST 4-HESI (5X20) GY/GY | ST 4 series terminal block with HESI indicator (5×20 size) + gray-gray (GY/GY) appearance, ideal for neutral circuit status monitoring in 4mm² AC systems |
| 3036385 | ST 4-HESI (6,3X32) | ST 4 series terminal block with HESI indicator (6.3×32 large size), clearer status display for long-distance monitoring of 4mm² circuits |
| LED Indicator (HESILED) Models | ||
| 3036547 | ST 4-HESILED 24 (5X20) | ST 4 series terminal block with 24V LED indicator (5×20 size), visual monitoring of 24V control circuit status in 4mm² systems |
| 3038765 | ST 4-HESILED 24 (6,3X32) | ST 4 series terminal block with 24V LED indicator (6.3×32 size), brighter display for 24V 4mm² circuit status monitoring |
| 3036550 | ST 4-HESILED 60 (5X20) | ST 4 series terminal block with 60V LED indicator (5×20 size), suitable for 60V medium-voltage 4mm² circuit status display |
| 3035182 | ST 4-HESILED 60 (6,3X32) | ST 4 series terminal block with 60V LED indicator (6.3×32 size), long-distance visual monitoring of 60V 4mm² circuit status |
| High-voltage Indicator (HESILA) Models | ||
| 3036563 | ST 4-HESILA 250 (5X20) | ST 4 series terminal block with 250V high-voltage indicator (5×20 size), status monitoring for 250V 4mm² high-voltage circuits |
| 3038778 | ST 4-HESILA 250 (6,3X32) | ST 4 series terminal block with 250V high-voltage indicator (6.3×32 size), clearer display for 250V 4mm² high-voltage circuit status |
| Special Function Models (HEDI/FSI/C/TG/MT) | ||
| 3035140 | ST 4-HEDI | ST 4 series terminal block with HEDI signal isolation function, reducing electromagnetic interference in 4mm² high-precision signal circuits |
| 3035221 | ST 4-HEDI BU | ST 4 series terminal block with HEDI signal isolation function + blue appearance, suitable for 4mm² high-precision control signal circuit isolation |
| 3036372 | ST 4-FSI/C | ST 4 series terminal block with FSI/C customized control function, tailored for specific 4mm² control circuit scenarios |
| 3036505 | ST 4-FSI/C-LED 24 | ST 4 series terminal block with FSI/C function + 24V LED indicator, visual monitoring of 24V customized control circuit status in 4mm² systems |
| 3038367 | ST 4-TG | ST 4 series terminal block with TG test point function, enabling on-site circuit testing without wire disconnection, suitable for key 4mm² circuit maintenance |
| 3038875 | ST 4-MT | ST 4 series terminal block with MT marking function, easy to label circuit information for later maintenance of 4mm² complex wiring systems |
2. Quick Interpretation of Model Naming Rules
| Naming Segment | Meaning | Explanation |
|---|---|---|
| ST 4 | Series prefix | Phoenix ST series terminal blocks, compatible with 4mm² wires, for medium-low power industrial circuit connection |
| -TWIN/-QUATTRO | Circuit configuration | - -TWIN: Double-circuit integration, space-saving for dual-circuit parallel wiring- -QUATTRO: Four-circuit integration, for high-density multi-channel wiring |
| -PE | Safety function | Protective grounding function, mandatory for electrical safety in industrial circuit systems |
| -DIO 1N 5408/L-R/R-L | Protection function | 1N 5408 diode reverse current protection, L-R/R-L represents the direction of current protection |
| /1P/2P | Derived function | 1P = single-circuit shunting; 2P = dual-circuit shunting, realizing branch wiring of main circuits |
| -HESI/-HESILED/-HESILA | Indicator function | - -HESI: Basic indicator, cost-effective circuit status monitoring- -HESILED: LED indicator (24V/60V), visual status display- -HESILA: High-voltage indicator (250V), for high-voltage circuit monitoring |
| (5X20)/(6,3X32) | Indicator size | Indicator dimensions; larger sizes (6.3×32) provide clearer display for long-distance monitoring |
| -HEDI | Signal function | Signal isolation function, reducing electromagnetic interference for high-precision signal circuits |
| -FSI/C | Custom function | Customized control function, tailored for specific industrial control scenarios |
| -TG | Maintenance function | Test point function, supporting on-site circuit testing without disconnection |
| -MT | Identification function | Marking function, facilitating circuit information management and maintenance |
| BU/OG/GY | Color suffix | Color coding for circuit identification: BU (blue) = control/signal; OG (orange) = alarm/emergency; GY (gray) = neutral |
3. Core Advantages of Phoenix ST 4 Series Terminal Blocks
- Diversified Circuit ConfigurationCovers double-circuit (TWIN) and four-circuit (QUATTRO) models, meeting both dual-circuit parallel and multi-channel high-density wiring needs, and supports 1P/2P branch shunting for flexible circuit design.
- Integrated Safety & Monitoring FunctionsIntegrates PE grounding, diode reverse current protection, signal isolation, and multi-type indicator functions, realizing full-link protection and status monitoring of 4mm² circuits, improving system reliability.
- Clear Circuit IdentificationProvides blue, orange, gray color coding options, distinguishing control signals, alarm signals, and neutral circuits at a glance, reducing wiring errors in complex systems by 40%+.
- Space-saving & Easy MaintenanceTWIN/QUATTRO multi-circuit models save 50% of installation space; TG test point models support on-site testing without wire disconnection, reducing maintenance downtime.
- Strong Scenario AdaptabilityCovers general control, multi-channel signal collection, high-precision signal isolation, and high-voltage circuit monitoring scenarios, suitable for manufacturing, automation, and power distribution industries.
4. Product Selection Suggestions
- Select by Circuit Quantity & Density
- For single-circuit 4mm² wiring: Choose basic ST 4 models (e.g., 3031364, 3031377).
- For dual-circuit parallel wiring: Select ST 4-TWIN series models (e.g., 3031393, 3031416).
- For four-channel high-density wiring: Adopt ST 4-QUATTRO series models (e.g., 3031445, 3037782).
- For branch shunting needs: Use ST 4/1P or ST 4/2P derived models.
- Select by Functional Requirements
- For electrical safety: Prioritize models with -PE suffix (e.g., 3031416, 3031461) or -DIO diode protection models (e.g., 3037782).
- For circuit status monitoring: Choose indicator models (e.g., 24V HESILED: 3036547; 250V HESILA: 3036563).
- For high-precision signal transmission: Select -HEDI signal isolation models (e.g., 3035140, 3035221).
- For maintenance convenience: Adopt -TG test point models (e.g., 3038367) or -MT marking models (e.g., 3038875).
- Select by Circuit Identification Needs
- For control/signal circuits: Choose blue (BU) models (e.g., 3031377, 3031403).
- For alarm/emergency circuits: Select orange (OG) models (e.g., 3037135, 3037355).
- For neutral circuits: Use gray (GY) models (e.g., 3039890).
Phoenix ST 4 Series Industrial Terminal Blocks Product Selection Guide
Created on：2026-01-14 11:04
