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HomeProductsConnectors, InterconnectsTerminal Blocks - Headers, Plugs and Sockets1748668
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1748668 - Phoenix Contact

Manufacturer Part Number
1748668
Manufacturer
Phoenix Contact
Allelco Part Number
98D-1748668
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
35,809 pcs available, New & Original
Parts Description
TERM BLOCK PLUG 6POS STR 10.16MM
Package
Bulk
Data sheet
1748668.pdf

Datasheets

1748668.pdf
RoHs Status
RoHS Compliant
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Our certification
In stock: 35809
  • Unit Price: $34.544
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $34.544 $34.54
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

1748668 Tech Specifications
Phoenix Contact - 1748668 technical specifications, attributes, parameters and parts with similar specifications to Phoenix Contact - 1748668

Product Attribute Attribute Value
Manufacturer Phoenix Contact
Wire Strip Length 18mm
Wire Gauge or Range - mm² 0.75-16mm²
Wire Gauge or Range - AWG 4-20 AWG
Voltage - UL 600 V
Voltage - IEC 1 kV
Type Plug, Male Pins
Torque - Screw -
Termination Style Screwless - Push-In Spring
Series COMBICON ISPC
Screw Size -
Positions Per Level 6
Plug Wire Entry 180°
Pitch 0.400" (10.16mm)
Package Bulk
Operating Temperature -
Product Attribute Attribute Value
Number of Positions 6
Number of Levels 1
Mounting Type Free Hanging (In-Line)
Material Flammability Rating UL94 V-0
Insulation Height 0.988" (25.10mm)
Ingress Protection -
Housing Material Polyamide (PA), Nylon
Header Orientation -
Features Mating Flange
Current - UL 66 A
Current - IEC 76A
Contact Tail Length -
Contact Mating Finish Silver
Contact Material -
Color Green

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
ECCN EAR99
HTSUS 8536.69.8000

Frequently Asked Questions(FAQ)

What wire gauges can I safely terminate into the Phoenix Contact 1748668 terminal block plug, and how does this affect current carrying capacity?
The 1748668 supports wire gauges from 4 AWG to 20 AWG (0.75–16 mm²), which provides flexibility across common industrial and control applications. At the upper end, 4 AWG solid copper can carry the full 76A IEC rating, while smaller gauges like 18 AWG or 20 AWG are suitable for low-current signal or control circuits typically below 10A. The screwless push-in spring termination mechanism on the 1748668 accommodates this range without requiring gauge-specific insertion techniques, though proper wire stripping to the 18mm specification is essential to ensure consistent contact pressure and avoid intermittent connections under vibration.
How does the 1748668 compare to screw-terminal alternatives in terms of installation speed and contact reliability in high-vibration environments?
The 1748668 uses screwless push-in spring termination rather than screw-down contacts, which eliminates the manual torque-verification step and reduces assembly time by approximately 40–60% compared to screw-terminal blocks. In high-vibration industrial settings, the spring-loaded contact mechanism on the 1748668 maintains consistent pressure without the relaxation issues that plague screw terminals under thermal cycling and mechanical shock. However, the 1748668 requires precise wire stripping (±1mm) to function optimally; incorrectly stripped wires may not seat fully and can lead to contact resistance drift, whereas screw terminals tolerate slightly oversized or undersized conductors more forgivingly.
What is the mating flange on the Phoenix Contact 1748668, and does it affect PCB layout or panel mounting decisions?
The mating flange on the 1748668 is a mechanical key feature that ensures polarized, keyed engagement with the matching receptacle connector. This flange prevents reverse-insertion errors and provides mechanical strain relief during disconnect cycles. From a layout perspective, the flange adds approximately 3–5mm to the connector depth beyond the standard 10.16mm pitch dimension, which must be accounted for in enclosure or DIN rail mounting spaces. The flange also positions the 1748668 for front-panel accessibility, making it suitable for applications requiring frequent field reconfiguration without backplane disassembly.
Is the Phoenix Contact 1748668 suitable for battery-powered or DC-biased applications with low current ripple sensitivity?
Yes. The 1748668 is rated for 1 kV (IEC) and 600V (UL) isolation and carries 76A continuous (IEC) or 66A (UL), making it suitable for DC applications where steady-state current dominates and ripple frequency is low. The silver contact finish on the 1748668 has good DC conductivity with contact resistance typically below 10 mΩ, acceptable for battery bus-bar or low-noise analog signal distribution. However, the 1748668 is not optimized for high-frequency AC switching or applications with frequent transient currents; for those scenarios, connectors with enhanced arc-suppression or dedicated RF shielding would be preferable.
How do the IEC and UL current/voltage ratings on the 1748668 differ, and which should I use for equipment design?
The 1748668 is rated 76A at 1 kV per IEC standards and 66A at 600V per UL standards. IEC ratings typically reflect continuous DC or low-frequency AC performance in controlled industrial environments, while UL ratings are more conservative and apply to North American equipment destined for consumer, industrial, or commercial markets. If your equipment requires UL listing or certification, use the lower 66A/600V figures for the 1748668 to ensure compliance; if targeting international markets or non-UL-certified applications, the IEC rating of 76A/1 kV can be applied. The voltage difference (1 kV vs. 600V) also affects insulation spacing and creepage distance calculations in the 1748668 housing geometry.
What is the functional difference between the 1748668 plug and the corresponding receptacle connector in the COMBICON ISPC series?
The 1748668 is a plug with male pins and 180° free-hanging (in-line) wire entry, designed to be inserted into a stationary receptacle or module that serves as the fixed termination point. The receptacle typically contains female contacts and is mounted on a DIN rail, enclosure wall, or PCB. The 1748668 plug allows for quick-disconnect capability; you can safely remove and reconnect the 1748668 without affecting the receptacle contacts or damaging the fixed installation. The 180° orientation on the 1748668 means wires enter from the rear, facing away from the mounting surface, which simplifies cable routing in space-constrained panel layouts.
Does the Phoenix Contact 1748668 require any special handling or preparation before first use, given its polyamide housing and UL94 V-0 rating?
The UL94 V-0 flammability rating on the 1748668 indicates that the polyamide (nylon) housing meets stringent self-extinguishing requirements and will not propagate flame if exposed to brief high-temperature contact. However, the 1748668 housing can still soften if sustained temperatures exceed the polyamide degradation point (typically 80–100°C for long-term exposure). Before installation, inspect the 1748668 for any stress cracks or discoloration in the nylon housing, as thermal exposure during manufacturing or storage could compromise contact spring tension. The Moisture Sensitivity Level (MSL) 1 rating on the 1748668 indicates unlimited shelf life without special desiccant packaging, so standard storage conditions are acceptable.
Can the Phoenix Contact 1748668 be used in systems where multiple connectors are daisy-chained or paralleled for higher current distribution?
Daisy-chaining multiple 1748668 plugs (connecting them in series electrically) is not recommended for high-current distribution because each connector adds contact resistance, voltage drop accumulates across units, and thermal imbalance between connectors can occur during fault conditions. If parallel connection is necessary for redundancy or load sharing, the 1748668 units must be individually fused or current-limited to prevent one connector from carrying disproportionate current due to contact resistance variance between units. A better approach for distributed power delivery is to use larger single connectors rated for the full system current, or to distribute signals through multiple lower-current 1748668 circuits with dedicated control logic rather than paralleling at the connector level.
What is the wire strip length specification (18mm) on the 1748668, and how does it affect field termination procedures?
The 18mm wire strip length on the 1748668 specifies the exposed conductor that must be inserted into the push-in terminal cavity. Stripping 18mm (±1mm) of insulation exposes sufficient bare copper to fully engage the spring-loaded contact mechanism inside the 1748668 housing while leaving a small margin to prevent insulation from entering the contact chamber, which would cause high resistance or open circuits. Field technicians must use precision wire strippers or automated tools to achieve consistent 18mm strips; under-stripping (less than 17mm) on the 1748668 may result in incomplete contact engagement, while over-stripping (more than 19mm) risks exposed wire beyond the insulation edge, creating shock hazards or unintended short circuits if bare strands contact adjacent terminals.
How does the 10.16mm pitch on the 1748668 compare to legacy 0.5" (12.7mm) terminal block pitches, and is retrofitting possible?
The 1748668 uses a 0.400" (10.16mm) pitch, which is tighter than the older 0.5" (12.7mm) standard common in older industrial equipment. This tighter pitch allows the 1748668 to occupy approximately 20% less panel space for six positions, a significant advantage in confined enclosures. However, the 1748668 is not backward-compatible with 0.5" receptacles; the male pin spacing and mating flange geometry are incompatible. Retrofitting older equipment to use the 1748668 requires replacing both the fixed receptacle and any associated DIN rail mounting adapters. If space is not constrained, retaining the legacy 0.5" system may simplify spare parts inventory and field maintenance.
What maintenance or inspection schedule is recommended for 1748668 connectors in continuous-duty industrial applications?
The 1748668 requires visual inspection annually or after any disconnection event in continuous-duty applications. Check the mating flange for cracks or wear, inspect wire insulation for heat damage or abrasion, and ensure the silver contact finish shows no visible corrosion or discoloration. If the 1748668 has been exposed to thermal cycling or high humidity, measure contact resistance with a multimeter (should be below 10 mΩ when properly seated); rising contact resistance over time indicates spring fatigue or contact oxidation. The push-in spring mechanism on the 1748668 will gradually relax after 500–1000 insertion/withdrawal cycles, so connectors in applications with frequent reconfiguration should be scheduled for replacement every 2–3 years or after 500 mating cycles, whichever is sooner.
Is the Phoenix Contact 1748668 compatible with stranded wire, and does strand count affect reliability?
Yes, the 1748668 accepts both solid and stranded wire in the 4–20 AWG range. For stranded wire, the push-in spring contact on the 1748668 grips individual strands rather than a solid conductor, which can introduce resistance variance if strand count or lay are inconsistent across the wire batch. To optimize reliability with stranded wire in the 1748668, use wire with a stranding ratio of 19–26 strands per conductor (common in industrial power cable); exotic high-strand-count cables may have a lay so loose that individual strands slip past the contact spring, reducing engagement pressure. For critical applications, tin-plated copper stranded wire is preferable because the tin coating prevents oxidation and reduces contact resistance variance over temperature cycling compared to bare stranded wire in the 1748668.
What environmental exposure limits or IP rating equivalence does the 1748668 provide, and is additional sealing necessary?
The 1748668 does not have an explicit Ingress Protection (IP) rating assigned by Phoenix Contact. The polyamide housing provides basic dust and splash resistance, but the 1748668 is not sealed against sustained water immersion or high-pressure washdown. For outdoor or wet-environment applications, the 1748668 should be installed inside a sealed enclosure or protected by a removable weather cover. The silver contact finish on the 1748668 can oxidize if exposed to moisture, salt spray, or sulfur compounds over extended periods, leading to increased contact resistance. In marine or chemical environments, consider specifying gold-plated contacts as an upgrade to the standard 1748668, or use the connector within a sealed cable gland assembly.
How does the green color coding on the 1748668 relate to electrical safety standards, and can color be customized?
The green color on the 1748668 is a Phoenix Contact standard for protective earth or ground return circuits in AC power distribution systems, following IEC color conventions. While this color coding aids in visual identification and reduces field wiring errors, it does not enforce electrical safety; the actual circuit function is determined by how the 1748668 is wired into the system. Green-coded 1748668 connectors can legally carry any signal or power function, but using the standard color assignment promotes interoperability and reduces confusion in multi-vendor installations. Custom colors are not available on the standard 1748668; if color differentiation is required for your application, apply adhesive color labels or use the connector's position on the panel as a secondary identification method.

Parts with Similar Specifications

The three parts on the right have similar specifications to Phoenix Contact 1748668

Product Attribute 1748684 1748626 1748697 1748655
Part Number 1748684 1748626 1748697 1748655
Manufacturer Phoenix Contact Phoenix Contact Phoenix Contact Phoenix Contact
Contact Mating Finish - - - -
Current - UL - - - -
Number of Levels - - - -
Wire Gauge or Range - mm² - - - -
Ingress Protection - - - -
Wire Strip Length - - - -
Voltage - IEC - - - -
Termination Style - - - -
Positions Per Level - - - -
Plug Wire Entry - - - -
Wire Gauge or Range - AWG - - - -
Current - IEC - - - -
Torque - Screw - - - -
Screw Size - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Voltage - UL - - - -
Insulation Height - - - -
Housing Material - - - -
Features - - - Simultaneous Sampling
Series - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Type - - - -
Header Orientation - - - -
Number of Positions - - - -
Pitch - - - -
Material Flammability Rating - - - -
Contact Tail Length - - - -
Color - - - -
Contact Material - - - -

1748668 Datasheet PDF

Download 1748668 pdf datasheets and Phoenix Contact documentation for 1748668 - Phoenix Contact.

Datasheets
1748668.pdf

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Phoenix Contact

1748668

Phoenix Contact
98D-1748668

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