Phoenix DFMC/DFK Series PCB Terminal Blocks Selection Guide
Phoenix DFMC/DFK series products are high-density PCB terminal blocks covering 1.5mm²–16mm² wire cross-sections and 3.5mm–10.16mm pitches. The series includes DFMC (1.5mm², 3.5mm pitch dedicated) and DFK (multi-spec sub-series: DFK-PC/DFK-MSTB/DFK-MC) products, with diverse terminal types (ST/STF/G/GF) and structural designs (LR left-right wiring). They are widely used in compact automation equipment, instrumentation, and control panel high-density wiring scenarios.
1. Core Model Classification & Product Descriptions
The series is categorized by sub-series characteristics for clear matching of wire spec and installation requirements:
1.1 DFMC Series (1.5mm², 3.5mm Pitch, High-density Wiring)
Unified 1.5mm² wire compatibility and 3.5mm ultra-narrow pitch, optimized for micro-signal circuit high-density layout; LR suffix = left-right dual-direction wiring design, suitable for narrow PCB spaces.
| Product Code | Model | Key Features | Application Scenarios |
|---|---|---|---|
| 1790289 | DFMC 1,5/20-ST-3,5 | 20-pole, screw terminal (ST), 3.5mm pitch | Ultra-high-density 20-channel micro-signal circuit connection |
| 1790661 | DFMC 1,5/20-ST-3,5-LR | 20-pole, ST terminal, left-right wiring | Narrow-space ultra-high-density signal circuit layout |
| 1790399 | DFMC 1,5/12-STF-3,5 | 12-pole, spring terminal (STF), tool-free wiring | High-efficiency assembly of 12-channel signal circuits |
| 1790111 | DFMC 1,5/ 3-ST-3,5 | 3-pole, ST terminal, basic model | Small-channel micro-signal circuit connection |
1.2 DFK Series (Multi-spec Sub-series, Diversified Application)
1.2.1 DFK-PC Sub-series (4/5/16mm², 7.62/10.16mm Pitch, Medium-power Circuits)
Covers medium-large wire specs, matching low-medium power control circuit connection needs.
| Product Code | Model | Key Features | Application Scenarios |
|---|---|---|---|
| 1716687 | DFK-PC 5/ 9-STF-7,62 | 5mm², 9-pole, STF terminal, 7.62mm pitch | Medium-power 9-channel control circuit quick wiring |
| 1828113 | DFK-PC 4/ 6-G-7,62-LOE | 4mm², 6-pole, grid terminal (G), 7.62mm pitch | Stable signal transmission for 6-channel control circuits |
| 1703496 | DFK-PC 16/ 6-STF-10,16 | 16mm², 6-pole, STF terminal, 10.16mm pitch | High-current 6-channel power circuit quick assembly |
1.2.2 DFK-MSTB/MSTBA Sub-series (2.5mm², 5.08mm Pitch, Signal Circuit Specialized)
G/GF grid terminal design, optimized for low-current precision signal transmission; GF = grid spring terminal, combining grid stability and spring quick wiring.
| Product Code | Model | Key Features | Application Scenarios |
|---|---|---|---|
| 0707374 | DFK-MSTB 2,5/16-G-5,08 | 2.5mm², 16-pole, G terminal, 5.08mm pitch | High-density 16-channel precision signal circuit connection |
| 0710303 | DFK-MSTB 2,5/15-GF-5.08 | 2.5mm², 15-pole, GF terminal, 5.08mm pitch | High-efficiency assembly of 15-channel precision signal circuits |
| 1899003 | DFK-MSTBA 2,5/ 4-GF-5,08 | 2.5mm², 4-pole, GF terminal, 5.08mm pitch | Small-channel precision signal quick wiring |
1.2.3 DFK-MC Sub-series (1.5mm², 3.81mm Pitch, Compact Signal Circuits)
3.81mm narrow pitch, GF terminal exclusive, for ultra-compact equipment signal circuit connection.
| Product Code | Model | Key Features | Application Scenarios |
|---|---|---|---|
| 1829413 | DFK-MC 1,5/10-GF-3,81 | 1.5mm², 10-pole, GF terminal, 3.81mm pitch | Ultra-compact 10-channel signal circuit quick wiring |
| 1829400 | DFK-MC 1,5/ 9-GF-3,81 | 1.5mm², 9-pole, GF terminal, 3.81mm pitch | Ultra-compact 9-channel signal circuit connection |
1.2.4 Special Accessories & Modules
| Product Code | Model | Key Features | Application Scenarios |
|---|---|---|---|
| 2818795 | D-FM-A/RJ45-BB | RJ45 interface adapter module | Terminal block-RJ45 port signal conversion |
| 0708263 | DFK-MSTB-SS | MSTB series terminal block accessory | Function expansion of DFK-MSTB terminals |
| 5030172 | DFK-MSTB-R | MSTB series terminal block accessory | Installation fixing of DFK-MSTB terminals |
2. Quick Interpretation of Model Naming Rules
| Naming Segment | Meaning | Explanation |
|---|---|---|
| DFMC/DFK | Series Identifier | - DFMC: 1.5mm² dedicated, 3.5mm pitch high-density terminal block- DFK: Multi-spec series, including DFK-PC/DFK-MSTB/DFK-MC sub-series |
| X (1.5/2.5/4/5/16) | Wire Cross-section | Compatible wire size (mm²), determines current-carrying capacity |
| /Y (2/3/4...20) | Pole Count | Number of connection channels, higher Y = higher wiring density |
| -ST/-STF/-G/-GF | Terminal Type | - ST: Screw terminal, manual tightening, stable clamping for long-term use- STF: Spring terminal, tool-free quick wiring, high assembly efficiency- G: Grid terminal, optimized for low-current precision signal transmission- GF: Grid spring terminal, combines grid stability and spring quick wiring |
| -P (3.5/3.81/5.08/7.62/10.16) | Pitch | Distance between adjacent poles (mm); smaller pitch = higher wiring density |
| -LR | Wiring Direction | Left-right dual-direction wiring, suitable for narrow PCB space layout |
| -LOE | Special Function | Enhanced insulation performance, for high-safety signal circuit scenarios |
3. Core Advantages of DFMC/DFK Series Products
- Ultra-high Density Wiring CapabilityDFMC series 3.5mm ultra-narrow pitch supports up to 20-pole high-density layout; DFK-MC series 3.81mm pitch realizes ultra-compact signal circuit wiring, maximizing space utilization in small equipment.
- Diversified Terminal Type OptionsST/STF/G/GF four terminal types match different needs: ST for stable long-term operation, STF for high-efficiency assembly, G/GF for precision signal transmission.
- Flexible Structural DesignDFMC series LR left-right wiring adapts to narrow PCB spaces; DFK sub-series cover multiple wire specs and pitches, meeting the connection needs of micro-signal to high-current circuits.
- Strong Signal Transmission StabilityG/GF grid terminal models optimize contact structure, reducing signal attenuation and interference, suitable for high-precision instrumentation and sensor signal circuits.
4. Product Selection Suggestions
- Select by Wire Cross-section & Current Requirements
- For 1.5mm² micro-signal circuits: Choose DFMC series (e.g., 1790289, 1790399) or DFK-MC series (e.g., 1829413).
- For 2.5mm² precision signal circuits: Select DFK-MSTB/MSTBA series G/GF terminal models (e.g., 0707374, 0710303).
- For 4–16mm² medium-high power circuits: Adopt DFK-PC series models (e.g., 1716687, 1703496).
- Select by Terminal Type & Assembly Efficiency
- For stable long-term operation (e.g., industrial control panels): Choose ST terminal models (e.g., DFMC 1,5/20-ST-3,5).
- For high-efficiency mass production (e.g., automation equipment assembly): Select STF/GF terminal models (e.g., 1790399, 0710303).
- For precision signal transmission (e.g., sensor, instrumentation): Use G/GF terminal models (e.g., 1828113, 0707374).
- Select by Installation Space Requirements
- For ultra-narrow PCB space: Choose DFMC series LR left-right wiring models (e.g., 1790661, 1790616).
- For standard installation space: Select non-LR models (e.g., 1790289, 1716687).
Phoenix DFMC/DFK Series PCB Terminal Blocks Selection Guide
Created on：2026-01-23 09:59
