SurLok Plus® | Compression Lug
Quick Lock and Press-to-Release Design, Plastic, RADSOK® Technology
SurLok Plus™ compression lugs deliver high-performance, reliable connections for EVs, energy storage, industrial equipment, and high-voltage power distribution systems. The quick lock and press-to-release design enables fast, tool-free installation, while RADSOK® technology ensures low resistance and high current performance in demanding environments.
At a Glance
- Up to 500A
- Current Rating
- 1000V / 1500V DC
- Voltage Rating
- IP67 / IP6K9K
- Sealed (Mated)
- -40°C to 125°C
- Temperature Range
- UL1977 / UL94 V-0 / TÜV / RoHS / REACH
- Certified
Key Features
Engineer Benefits
RADSOK® Contact Technology
Amphenol's RADSOK® technology delivers low contact resistance and high stability. The stamped and formed grid structure maximizes surface area for efficient current distribution and long-term reliability.
- Lower resistance and less heat rise
- Higher current capacity in a smaller package
- Longer service life and improved reliability
Quick Lock and Press-to-Release Design
Press-to-release mechanism allows for fast, tool-free connections and disconnections, significantly reducing assembly time and maintenance intervals.
- Faster installation and lower labor time
- No tools required for connect/disconnect
- Simplified servicing and maintenance
Touch-Proof Housing
Housing design protects against accidental contact with live components. The optional HVIL (High Voltage Interlock) and EMI shielding ensure operator safety in high-voltage applications.
- Improved operator safety
- Meets high-voltage system requirements
- EMI shielding helps maintain system integrity
Multiple Mounting Options
Available in inline plug, 90° rotating plug, and panel mount configurations for flexible installation in a wide variety of system layouts.
- Design flexibility for tight or custom spaces
- Supports a wide range of mounting needs
- Simplifies integration into existing systems
Durable & Environmental Protection
Rugged plastic housing offers resistance to dust, water, chemicals, and harsh environments. Rated IP67/IP6K9K when mated.
- Withstands harsh industrial environments
- Reliable performance in wet and dusty conditions
- Long-term durability and reduced downtime
HVIL & EMI Options Available
Optional High Voltage Interlock Loop (HVIL) and EMI shielding help improve system safety and protect against electromagnetic interference.
- Meets functional safety requirements
- Protects sensitive electronics from EMI
- Improves overall system reliability
Applications
Alternative Energy
Datacom/Telecom
eMobility
Energy Storage
Factory Automation
Heavy Equipment
Power Distribution
Rail Mass Transit
Solar
Engineer Tips
High Vibration Environments
SurLok Plus™ is ideal for applications exposed to constant vibration and shock.
Field Serviceability
Quick lock and press-to-release design reduces downtime and simplifies field maintenance.
EV & ESS Safety
Use HVIL versions in electric vehicle and energy storage systems to meet safety requirements.
High-Noise Applications
Choose EMI shielding options to help protect sensitive electronics in high-noise environments.
Frequently Asked Questions
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Technical Highlights
- Rated Voltage: 1000V DC and 1500V DC options
- Current Rating: 500A to 500A
- Ingress Protection: IP67 or IP6K9K, depending on size and mating
- Operating Temperature: -40°C to 125°C
- Touch Proof: IP2X
- Rotating Plug: 360° rotating plug for flexible cable installations
- Float-in Plug: ±30%
- EMI: Optional EMI shielding (Al) (self-extinguishing)
- Certification: UL1977, TÜV ≥PFG1942, RoHS, and REACH compliant
- Durability: Rated for over 100 mating cycles
- Cable Range: 2.5 mm² to 150 mm²
- Keyway Options: Multiple keying configurations for secure mating
- Connection Type: Compression lug via RADSOK® technology
- Material: Thermoplastic housing, copper alloy conductors
Specifications
| Voltage | 1000V / 1500V DC |
|---|---|
| Current Rating | Up to 500 amps |
| Number of contacts | 1 |
| EMI | Optional (8mm/14mm) |
| HVIL | Optional (8mm/14mm) |
| Certifications | UL1977/4128, TÜV 2PfG2740 |
| Touch proof | IP2X |
| Cable O.D. | Ø4.8mm ~ 28mm |
|---|---|
| Mating cycles | 100+ |
| Wire size (mm²) | 2.5 mm² ~ 150 mm² |
| Keyway | Multiple |
| Locking element | Spring / Secondary Lock |
| Contact plating | Silver over nickel |
|---|---|
| Contacts | Copper alloy |
| Sealing components | Silicone |
| EMI components | Aluminum |
| Shell | Thermoplastic |
| Temperature range | -40 °C ~ 125 °C (1500V DC) | -40 °C ~ 105 °C (1000V DC) |
|---|---|
| Flammability | UL94 V-0 |
| Protection class | IP67 / IP6K9K |
| RoHS | Yes |
| REACH | Yes |
Documents
Catalogs & Brochures
| Resource | Download |
|---|---|
| SurLok Plus Catalog |
Other Documents
| Resource | Download |
|---|---|
| Application White Paper | |
| Assembly Instructions | |
| Surlok Plus Sop 1 |
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