J599HV High-Voltage, High-Current Circular Connectors, up to 300 A
Up to 300 A · 3500 V withstanding · IP65 · HV interlock option
High-Voltage & High-Current Circular Connectors
Compact circular connectors for high-voltage, high-power circuits — J599HV carries up to 300 A per contact at 3500 V withstanding voltage, sealed to IP65, and bayonet KH contacts carry up to 800 A.
Electric drives, battery systems and power electronics need connectors that carry hundreds of amps at high voltage in a small, sealed and shielded package, and that stay locked under vibration.
Our J599HV series combines 38999-style threaded coupling with large power contacts from 80 A to 300 A, 3500 V withstanding voltage, IP65 sealing, EMI shielding and an optional high-voltage interlock. Crimp, solder and bolted contacts are available, with straight, 90° or 45° backshells.
For bayonet power connections, XCD carries 25 to 300 A per contact on hyperboloid sockets, and KH packs contacts from 5 A up to 800 A into a compact bayonet shell, with a hermetic through-bulkhead version. 38999 Series III-type power connectors carry 33 to 225 A per contact with solder-cup or crimp terminations.
Compare series
| Series | Current rating | Withstanding voltage | Contacts | Temperature | Rated voltage | Mating cycles |
|---|---|---|---|---|---|---|
| J599HV | 80–300 A per contact | 3500 V | 1 to 4 | −55 to +175 °C | ||
| GJB599 power | 33–225 A | 1500 V | Size 10 to 4/0 | −65 to +200 °C | ||
| XCD | 25 to 300 A | 1 to 9 | −55 to +150 °C | 500 V (1500 V test) | 500 | |
| KH | 5 to 800 A | 1500 V | −55 to +150 °C | 400 V at sea level | 500 |
38999 Series III-Type Power Connectors, 33 to 225 A
33–225 A · 38999 Series III shell · marine grade
XCD Bayonet Power Connectors, 25 to 300 A per Contact
Power contacts 25–300 A · hyperboloid sockets · bayonet
KH High-Current Circular Connectors, 5 to 800 A
5–800 A per contact · 400 V · 30 layouts · hermetic bulkhead version
How to choose
Current per contact
On J599HV, choose the contact size from the current: size 6 (80 A) to size 4/0 (300 A). KH contacts run from 5 A to 800 A. Allow for ambient temperature and cable size.
Voltage
State your working voltage. J599HV is tested at 3500 V withstanding voltage; each series page states its own test voltage.
Interlock
Choose the 02 version if your system needs a high-voltage interlock loop.
Termination and cable exit
Crimp, solder or bolted contacts; straight, 90° or 45° backshells to suit the installation space.
Options beyond the standard connector
38999-type signal connectors
Pair power with J599 Series III signal connectors.
Subsea power, 250 A
SHX34 single-contact underwater power connector.
Frequently asked questions
Do you make custom high-voltage connectors?
Yes. Contact counts, contact sizes and backshells can be customized. Send us your voltage, current, cable size and space envelope.
What is the lead time?
Samples typically take 4–8 weeks and production orders 4–8 weeks. Send us your requirement and we will confirm the lead time with the quotation.
From sample to production
Send your requirements
Part number, drawing, pin-out or a short description of your application.
Configuration and quote
Our engineers match the configuration and reply with a drawing and quotation.
Samples
Samples are built to order. The minimum order quantity is 10 pieces, and samples and production orders each take 4–8 weeks. Third-party testing to your specification is available on request.
Your approval
You test the samples in your own equipment and approve them.
Series production
Production follows the approved sample configuration, with machining, molding, plating and assembly in our own Shenyang factory.
Need a quote or a drawing?
Send your part number, pin-out or drawing. Every inquiry is acknowledged by email within 1 business day, and an engineer follows up with a matched configuration, drawing or quotation.