YDCHARGE NACS to CCS1 DC Fast Charging Adapter
High-Current Certified DC Interoperability Solution for OEM & Fleet Integration
UL 2252 Certified
SAE J3400 & J3400/1 Tested
Type 3S Enclosure
The YDCHARGE NACS to CCS1 DC Fast Charging Adapter is a high-current DC interface adapter designed to connect CCS Combo 1 (CCS1) electric vehicles to compatible SAE J3400 / NACS DC charging equipment. Rated at 500 A and 1,000 V DC, it is developed for OEM programs, charging equipment integration, fleet applications, and professional EV charging projects requiring a certified high-power NACS to CCS1 interface solution.
No voltage conversion and no charging-protocol translation required.
Dual-interface monitoring with automatic control-signal interruption under over-temperature.
UL 94 V-0 flame-retardant housing, Type 3S enclosure, and >10,000 no-load mating cycles.
YDCHARGE NACS to CCS1 DC Fast Charging Adapter
Professional High-Current DC Interface Solution for EV Infrastructure & Fleet Operations
UL 2252 Certified
SAE J3400 & J3400/1
Type 3S Enclosure
DC Fast Charging Only
Product Overview & Charging Direction
YDCHARGE NACS to CCS1 DC Fast Charging Adapter provides a high-current physical interface between compatible SAE J3400 / NACS DC charging equipment and electric vehicles equipped with a CCS Combo 1 vehicle inlet. Designed for professional EV charging applications, the adapter supports a rated current of 500 A and a rated voltage of 1,000 V DC. Its high-current contact system, integrated temperature monitoring, and certified enclosure design make it suitable for OEM accessory programs, charging equipment manufacturers, fleet operators, charging infrastructure projects, and vehicle compatibility evaluation.
Core Engineering & Electrical Architecture
500 A High-Current Interface
The adapter is rated for 500 A and 1,000 V DC, providing a high-current interface for compatible DC fast charging applications. As a passive charging adapter, it does not determine the actual charging power delivered to the vehicle. Charging power is controlled by the DC charging equipment and vehicle according to battery voltage, requested current, charging-system limits, thermal conditions, and charging-network control. The adapter therefore should not be assigned a fixed charging power such as 250 kW solely from its current and voltage ratings.
Passive Power-Path Architecture
The adapter functions as a passive DC charging interface between the NACS charging connector and CCS1 vehicle inlet. It does not convert AC power to DC power, convert one DC voltage to another voltage, increase charging power, or act as an independent EV charger. The adapter also does not perform charging-protocol translation. Charging communication is maintained between compatible charging equipment and the vehicle through the applicable interface and communication path.
Dual-Interface Temperature Protection
High-current DC charging requires effective thermal monitoring at the electrical connection points. The adapter integrates temperature sensors at both the NACS interface and the CCS1 interface. During charging, the temperature monitoring system continuously supervises the connection areas. If an over-temperature condition is detected, the protection system interrupts the charging control signal so that the charging session is stopped before continued excessive heating can occur.
Low Contact Resistance System
The conductive contact system is designed for high-current DC charging with a specified contact resistance of no more than 0.5 mΩ. Low contact resistance helps reduce resistive losses and localized heat generation at the high-current interface. Final charging performance still depends on the complete electrical path, including the charging connector, adapter contacts, vehicle inlet, cable assembly, and actual operating current.
Electrical Insulation & Hardware Ratings
≥500 MΩ at 500 V DC
2,500 V AC
1,000 V DC / 500 A
>10,000 No-Load Cycles
The adapter uses a Type 3S enclosure for demanding EV charging environments. The enclosure is designed to provide environmental protection appropriate to the certified Type 3S classification. Housing materials meet UL 94 V-0 flammability requirements. Type 3S should be treated as the certified enclosure classification for this product and should not be converted into an IP rating or another enclosure classification unless separately evaluated and documented.
Important Operational Notice: DC Fast Charging Only
This product is designed for DC fast charging applications only. It must not be used as an adapter for NACS AC Level 1 or Level 2 charging equipment, residential AC wall connectors, or other AC charging applications. It also does not provide vehicle-to-load (V2L), vehicle-to-home (V2H), or other vehicle power-export functions.
Compatibility & Regulatory Compliance
CCS1 Vehicle Side Compatibility
The vehicle side is designed for electric vehicles equipped with a compatible CCS Combo 1 (CCS1) DC vehicle inlet. Physical connector compatibility alone does not guarantee that every CCS1 vehicle can charge from every NACS DC charging station. Successful charging may also depend on vehicle software, charging-station software, communication compatibility, network authorization, and vehicle-manufacturer policies.
NACS Equipment Compatibility
The charging-equipment side is designed to accept a compatible SAE J3400 / NACS DC charging connector. The adapter should only be used where the charging equipment operator and vehicle manufacturer permit the use of the applicable third-party adapter. Access to individual charging networks can be controlled through software, vehicle identification, account authorization, or network policy.
UL 2252 Certified EV Adapter
The adapter is certified to UL 2252 (Adapters for Use with Electric Vehicle Couplers) for the applicable product configuration. UL 2252 addresses EV charging adapters used to convert the physical interface configuration between charging equipment and a vehicle while maintaining the required charging communication path. Certification covers 500 A rated current and 1,000 V DC rated voltage.
SAE J3400 & J3400/1 Validation
The adapter has been tested and validated to applicable SAE J3400 and SAE J3400/1 requirements. SAE J3400 defines the North American Charging System conductive charging interface, while SAE J3400/1 addresses the safety and performance considerations associated with adapters between SAE J3400 and SAE J1772 / CCS1 charging interfaces.
OEM & ODM Adapter Project Support
YDCHARGE supports OEM and ODM cooperation for NACS to CCS1 DC fast charging adapter programs. Project support includes private labeling, logo application, custom packaging design, product labeling, application validation, sample evaluation, and volume project pricing.
*Note for certified products: Any customization that affects electrical construction, housing material, contact system, temperature protection, labeling, or other certification-controlled characteristics must remain within the applicable certification file or be evaluated before mass production.
Technical Specifications
| System Overview & Architecture | |
|---|---|
| Product Type | NACS to CCS1 DC Fast Charging Adapter |
| Charging Direction | Compatible NACS DC charging equipment → Adapter → CCS1 vehicle inlet |
| NACS Interface | SAE J3400 / NACS DC charging interface |
| Vehicle Interface | CCS Combo 1 / CCS1 |
| Adapter Architecture | Passive DC charging interface adapter |
| Power Conversion | None |
| Voltage Conversion | None |
| Protocol Translation | None |
| Charging Mode | DC charging only |
| AC Charging | Not supported |
| OEM/ODM Support | Supported |
| Electrical & Thermal Performance | |
| Rated Current | 500 A |
| Rated Voltage | 1,000 V DC |
| Temperature Monitoring | Dual temperature sensors, monitoring both NACS and CCS1 interfaces |
| Over-Temperature Protection | Charging control signal interruption when an over-temperature condition is detected |
| Insulation Resistance | ≥500 MΩ at 500 V DC |
| Dielectric Withstand Voltage | 2,500 V |
| Contact Resistance | ≤0.5 mΩ |
| Mechanical, Environmental & Compliance | |
| Housing Flammability | UL 94 V-0 |
| Enclosure Type | Type 3S |
| Operating Temperature | −30°C to +50°C |
| Mechanical Life | >10,000 no-load mating cycles |
| Certification | UL 2252 certified |
| Standards / Validation | SAE J3400 and SAE J3400/1 tested and validated |
Application Scenarios
OEM EV Charging Accessory Programs
The adapter can be supplied for OEM and private-label EV charging accessory projects that require a certified NACS to CCS1 DC charging interface. Certification-controlled construction should be maintained when branding, labeling or packaging is customized.
Charging Equipment Integration and Validation
EVSE manufacturers, charging system integrators and charging-network engineering teams can use the adapter in compatible SAE J3400 to CCS1 DC charging applications where third-party adapter deployment is permitted. The target charging equipment and vehicle combination should be validated before commercial deployment.
Fleet Charging Applications
Fleet operators managing CCS1 vehicles can evaluate the adapter for compatible NACS DC charging infrastructure where the applicable vehicle manufacturer and charging network authorize adapter use.
Vehicle and Charging-System Testing
The adapter can support engineering evaluation, interoperability testing, vehicle validation and charging-system development involving compatible NACS DC charging equipment and CCS1 vehicle platforms.
B2B Distribution and Private Label Programs
YDCHARGE supports distributors, charging accessory brands and EVSE companies with OEM/ODM supply, branded packaging, product labeling, samples and volume production.
NACS to CCS1 DC Fast Charging Adapter FAQs
Frequently Asked Questions for B2B, OEM/ODM & Engineering Integration