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Phoenix Contact MSTB 2.5/3-ST-5.08 PCB Connector (Order No.: 1757022) is a universal connector based on the COMBICON MSTB 2.5 plug-in system. It belongs to the MSTB 2.5/.. -ST product series. Its core function is to provide stable interface between PCB boards and external conductors, widely applicable in industrial automation, instrumentation, power control equipment, and other scenarios to meet signal and power transmission requirements for medium-to-low power circuits.
Tin-plated contact surfaces with a nominal cross-sectional area of 2.5 mm² ensure low contact resistance transmission at 12 A current and 320 V voltage, minimizing heat generation and signal loss to meet mid-to-low power circuit requirements.
The screw connection design with tension sleeves enhances wire retention stability, preventing connection loosening due to environmental factors like vibration and improving long-term operational reliability.
The 5.08 mm standard pin pitch and 1-row 3-position structure align with common industrial PCB layouts, facilitating compatibility with devices of the same specification.
The 0° connection orientation simplifies PCB installation routing, eliminating the need for additional angle adjustments and reducing assembly complexity.
The green appearance enables quick identification in multi-connector scenarios, improving maintenance and troubleshooting efficiency.
Operating temperature range spans -40°C to +100°C, with storage range from -40°C to +70°C, adapting to extreme temperatures in industrial environments.
Complies with RoHS environmental standards, featuring UL 94 V0 flame-retardant insulation material to meet industrial equipment safety and eco-compliance requirements.
Leveraging standardized design and stable performance, this connector is primarily used in the following scenarios:
| Product type | PCB connector |
| Product family | MSTB 2,5/..-ST |
| Product line | COMBICON Connectors M |
| Type | Standard |
| Number of positions | 3 |
| Pitch | 5.08 mm |
| Number of connections | 3 |
| Number of rows | 1 |
| Number of potentials | 3 |
| Mounting type | without |
| Nominal current IN | 12 A |
| Nominal voltage UN | 320 V |
| Contact resistance | 1.3 mΩ |
| Rated voltage (III/3) | 250 V |
| Rated surge voltage (III/3) | 4 kV |
| Rated voltage (III/2) | 320 V |
| Rated surge voltage (III/2) | 4 kV |
| Rated voltage (II/2) | 630 V |
| Rated surge voltage (II/2) | 4 kV |
| Connector system | COMBICON MSTB 2,5 |
| Nominal cross section | 2.5 mm² |
| Contact connection type | Socket |
| Note | WEEE/RoHS-compliant, free of whiskers according to IEC 60068-2-82/JEDEC JESD 201 |
| Contact material | Cu alloy |
| Surface characteristics | hot-dip tin-plated |
| Metal surface terminal point | Tin (5 - 7 µm Sn) |
| Metal surface contact area | Tin (5 - 7 µm Sn) |
| Color (Housing) | green (6021) |
| Insulating material | PA |
| Insulating material group | I |
| CTI according to IEC 60112 | 600 |
| Flammability rating | V0 |
| Glow wire flammability index GWFI | 850 |
| Glow wire ignition temperature GWIT | 775 |
| Temperature for ball pressure test | 125 °C |
| Width [w] | 15.24 mm |
| Height [h] | 15 mm |
| Length [l] | 18.3 mm |
| Specification | IEC 60068-2-6:2007-12 |
| Frequency | 10 - 150 - 10 Hz |
| Sweep speed | 1 octave/min |
| Amplitude | 0.35 mm (10 Hz ... 60.1 Hz) |
| Acceleration | 5g (60.1 Hz ... 150 Hz) |
| Test duration per axis | 2.5 h |
| Test directions | X-, Y- and Z-axis |
Models: Phoenixcontact MSTB 2,5/ 3-ST-5,08 - PCB connector 1757022
| Item number | 1757022 |
| Packing unit | 100 pc |
| Minimum order quantity | 100 pc |
| Weight per piece (including packing) | 5.16 g |
| Weight per piece (excluding packing) | 5.153 g |
| Customs tariff number | 85366990 |
| Country of origin | CN |
