KUPO Power / Selection guide
PowerFit 500A vs 800A
Choose the right connection.
Compare current ratings, contact materials and cable terminations. Then match the connector to your equipment, installation and documented operating conditions.
01 / Start with the connection
Two ratings. Different assembly requirements.
PowerFit 500A and 800A are single-pole connector ranges with line source, line drain, panel source and panel drain formats. Current rating is the starting point. The cable termination, source or drain role, and exact product configuration also matter.
150mm² set-screw line connection
PowerFit 500A uses silver-plated brass contacts and is rated 500A Maximum.
- Line drain: double set screws for 150mm² cable.
- Panel source: M12 threaded post.
- IP67 rating while mated.
400mm² crimp line connection
PowerFit 800A uses silver-plated copper contacts and is rated 800A Maximum.
- Line drain: crimp for 400mm² cable.
- Panel source: M12 threaded post.
- IP67 rating while mated.
Select the complete assembly. A connector's maximum rating does not, by itself, establish the allowable current of an installed cable assembly. Confirm the cable, termination, ambient conditions and duty with the project engineer and KUPO.
02 / Side-by-side
The differences that help you select
The values below come from the KUPO 2026 V1 datasheets listed at the end of this guide. Line-termination details refer to the line-drain models and panel details to the panel-source models.
| Selection factor | PowerFit 500A | PowerFit 800A |
|---|---|---|
| Amperage rating | 500A Maximum | 800A Maximum |
| Voltage rating | 1000V AC/DC Maximum | 1000V AC/DC Maximum |
| Contact material | Brass (silver-plated) | Copper (silver-plated) |
| Line-drain termination | Double Set Screws (for 150mm² cable) | Crimp (for 400mm² cable) |
| Panel-source termination | M12 threaded post | M12 threaded post |
| Connection | Push-and-twist; key release mechanism on the panel source | Push-and-twist; key release mechanism on the panel source |
| Ingress protection | IP67 rating while mated | IP67 rating while mated |
| Mating cycle | 500 | 500 |
| Body flammability | UL94-V0 (body material rating) | UL94-V0 (body material rating) |
Check the exact item datasheet for cable-gland fit, assembly instructions and dimensional requirements.
03 / Make your selection
Four checks before specifying a connector
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Define the electrical requirement
Provide the operating current, voltage, load profile and expected ambient temperature. For a requirement above the 500A maximum rating, evaluate the 800A range with KUPO. Suitability still depends on the complete assembly and operating conditions.
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Match the cable and termination
Specify conductor cross-section and cable outside diameter. The 500A line drain uses a set-screw termination for 150mm² cable; the 800A line drain uses a crimp termination for 400mm² cable. Confirm the gland, bushing and assembly requirements for the ordered item.
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Choose the connection format
Select line or panel mounting, then source or drain. Identify the mating connector and the required phase, neutral or protective-earth marking. Confirm the exact pair and mounting dimensions before ordering a replacement.
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Review evidence for the project
Check the item datasheet, relevant certification scope and available test reports. For long operating periods, a warm enclosure or a different cable size, request a configuration review instead of extending a laboratory result to the new installation.
04 / Test evidence
Measured performance, with the conditions attached
KUPO's temperature-rise reports document a panel-source to line-drain assembly for each rating. Both reports record a three-hour test and a PASS assessment for their documented setup.
500A assembly test
503A recorded test current
150mm² cable
25.0°C ambient temperature
3 hours test duration
800A assembly test
807A recorded test current
400mm² cable
27.0°C ambient temperature
3 hours test duration
The assemblies, cable sizes and ambient temperatures differ. These tests do not establish a like-for-like thermal ranking, a derating curve, or an unlimited continuous-duty rating. The recorded test currents do not replace the datasheet ratings.
05 / Application planning
Start with the load, wherever the power is needed
Generator connections, event power distribution, industrial equipment and load-bank testing are application contexts for discussing a PowerFit installation. An application name alone does not decide between 500A and 800A.
Generators and temporary power
Bring the generator output requirement, distribution layout, cable specification and expected run time to the selection discussion.
Explore temporary powerIndustrial equipment and test systems
Identify the equipment interface, operating load, enclosure conditions and termination requirements so KUPO can review the proposed connection.
Discuss an equipment integration06 / Common questions
What to confirm before you order
Is 500A only for short runs, and 800A for continuous operation?
No. The datasheets rate the ranges at 500A maximum and 800A maximum, and both temperature-rise reports describe three-hour tests. Selection for prolonged operation requires a review of the actual assembly, load and environment.
Can PowerFit mate with P3 or ITT connectors?
Confirm the exact counterpart model with KUPO before specifying a mixed-brand connection. A similar appearance or nominal current rating is not sufficient evidence of compatibility. Request confirmation of mating geometry, keying, electrical ratings and the applicable certification scope.
What do the datasheets say about certification?
PowerFit 500A and 800A are TÜV Rheinland certified to IEC 61984, hold CB and UKCA certificates, and are CE marked and RoHS and REACH compliant. Request the certificate copies for your project. PowerFit is not UL listed; UL94-V0 is the flammability rating of the body material.
Does IP67 apply to a disconnected connector?
No. The datasheets state “IP67 rating while mated.” Confirm the required protection arrangements for unmated connections with KUPO.
Can I use a different cable size or termination?
Check the exact ordered item with KUPO. This comparison covers a 150mm² set-screw line drain and a 400mm² crimp line drain. The test results apply to their documented assemblies and do not establish performance for other cable sizes.