DTL-2 Copper Aluminum Terminal Lug Wire Connector Cable Crimp Terminals DTL-2-10/16/25/35/50/70/95/120/125/185/240/300/400mm2
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SKU: 14:1254#DTL-2-500;200497261:200000932#1 Piece
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DTL-2 Series Bimetallic Terminal Lug (Copper–Aluminum Compression Connector)
The DTL-2 Series is a bimetallic compression lug engineered for terminating aluminum conductors to copper busbars and terminals in switchgear, transformers, and power distribution equipment. A red copper barrel and white aluminum palm provide a stable Cu–Al transition, ensuring low contact resistance, minimized galvanic interaction, and durable performance under thermal cycling.
Functional Characteristics
- Bimetallic transition: Copper barrel to aluminum palm for Cu–Al interfaces without bimetal pads.
- Low-resistance interface: Controlled surface state (pickled) for stable milli-ohm-level contact.
- Thermal stability: Reduced temperature rise at rated current; suitable for cyclic loads.
- Mechanical integrity: High tensile strength and consistent crimpability over specified conductor ranges.
- Corrosion mitigation: Material pairing and process minimize galvanic corrosion in mixed-metal terminations.
Technical Specifications
- Type
- Compression Lug (Crimp Type)
- Series
- DTL-2
- Material Composition
- Red Copper (barrel) + White Aluminum (palm/pad)
- Manufacturing Process
- Surface Pickling (oxide removal; enhanced bonding and conductivity)
- Surface Condition
- Smooth, anti-oxidation treated, ready for crimping
- Electrical Performance
- Low contact resistance; steady current-carrying capability; reduced thermal rise under rated load
- Chemical Compliance
- No high-concern chemicals; RoHS-oriented materials
- Applications
- Busbar terminations, switchgear, transformers, industrial control panels, utility distribution
Selection Matrix (Typical)
Select the correct DTL-2 lug by conductor cross-section, stud size, and required palm/barrel geometry.
| Model | Conductor Range | Barrel I.D. (Øb) | Palm Hole (Ød) | Palm Width (W) | Barrel Length (L1) | Overall Length (L) | Notes |
|---|---|---|---|---|---|---|---|
| DTL-2-16 | 16 mm² (≈ #5 AWG) | — | M8 / 5/16" | — | — | — | Standard palm; single hole |
| DTL-2-35 | 35 mm² (≈ #2 AWG) | — | M10 / 3/8" | — | — | — | Standard palm; single hole |
| DTL-2-70 | 70 mm² (≈ 2/0 AWG) | — | M12 / 1/2" | — | — | — | Heavy-duty palm |
Tip: Populate the dimensions (Øb, Ød, W, L1, L) per datasheet to capture long-tail searches like “DTL-2 70 mm² M12 dimensions.”
Installation & Interface Guidance
- Use calibrated hex or dieless crimp tooling matched to the conductor cross-section and barrel I.D.
- Prepare aluminum conductors per best practice (oxide removal; inhibitor as required by site spec).
- Ensure flat, clean copper busbar contact; torque hardware to spec using appropriate washers/spacers.
- For outdoor or corrosive environments, apply sealing where specified to limit moisture ingress.
Technical FAQ
When should a DTL-2 bimetallic lug be used?
Whenever an aluminum conductor must terminate on a copper terminal or busbar, to limit galvanic effects and thermal rise.
Does the DTL-2 reduce contact resistance vs. direct Al–Cu contact?
Yes. The controlled Cu–Al interface and pickled surfaces maintain low contact resistance and stable performance in service.
Is the DTL-2 RoHS compliant and free of high-concern chemicals?
Yes. No high-concern chemicals are used; materials are selected with RoHS considerations.
Related Search Terms
Related terms: bimetallic copper aluminum compression lug, DTL-2 series terminal connector, copper to aluminum conductor termination, Cu–Al busbar lug, electrical compression terminal.
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