KEDU KJD18 vs DKLD DZ05: Three-Phase 400V Electromagnetic Switch Replacement Guide
KEDU KJD18 vs DKLD DZ05: Three-Phase 400 V Electromagnetic Switch Replacement Guide
Machines built with a KEDU KJD18 three-phase electromagnetic switch — drilling machines, stationary power tools, saws, pumps and compressors — eventually need a second source. This replacement guide from DKLD Dongke Electric compares the KJD18 application slot with the DKLD DZ05 series: the two are treated as interchangeable in the European aftermarket, and the certified ratings are listed below so you can qualify the swap.
Direct answer: Yes — the DKLD DZ05 series is an application-compatible alternative for the KEDU KJD series (e.g. KJD18) three-phase 400 V application slot. German electrical distributor kahlhorn.com lists the KJD18 explicitly as a "replacement for DKLD DZ05 (Yue Qing Dongke Electric)", confirming the two families are treated as interchangeable in the European market. On ratings, the DZ05B offers AC-3 10 A at 400 V~ (vs KJD18's AC-3 7.5 A) in an IP55 enclosure (vs IP54 front-side), both certified to EN 60947 with TÜV/CE, and both provide undervoltage (power-loss) restart prevention — the machine stays off until manually restarted. The DZ05D covers three-phase reversing duty, matching the KJD18-2's two-direction control. As with any changeover, confirm the installation dimensions and terminal wiring against your machine before production.
KJD18 vs DZ05B: Parameter Comparison
| Specification | DKLD DZ05B | KEDU KJD18 |
|---|---|---|
| Standard | TÜV (EN 60947) | TÜV / CE (EN 60947) |
| Rated voltage | 400 V~ | 400 V~, 50 Hz |
| Rated current | AC-3 10 A | AC-3 7.5 A (AC-1 13.5 A) |
| Degree of protection | IP55 | IP54 (front side) |
| Poles / terminals | Three-phase | 3 poles N/O, 7 terminals (6× 6.3×0.8 mm + A1 coil contact) |
| Undervoltage / restart prevention | Yes | Yes (zero-voltage release) |
| Reversing variant | DZ05D (three-phase reversing) | KJD18-2 (two-direction control) |
| Mechanical life | 50,000 cycles | Per KEDU catalog |
Applications
| Machine type | Why an EN 60947 three-phase switch |
|---|---|
| Drilling machines | Frequent start/stop under load; restart prevention after power loss |
| Stationary power tools (saws, grinders) | Positive coil-held contacts survive vibration; remote stop via external coil contact (A1) |
| Pumps, compressors, small industrial machinery | Three-phase 400 V motor duty with undervoltage protection |
Wiring & Qualification Notes
On the KJD18 seven-terminal layout, the switch is connected to the mains on terminals 1, 3 and 5, motor side on 2, 4 and 6, with an external coil contact A1 for remote triggering (emergency stop, limit switch or thermal contact). The DZ05 series provides the same control class with the same EN 60947 basis. When qualifying a changeover, request the DZ05 datasheet and a sample, and verify: mounting cut-out dimensions (distributors warn that KEDU designation is not always unambiguous), terminal assignment, and coil voltage (400 V~) match.
FAQ
Can DKLD DZ05 replace a KEDU KJD18?
Yes, on electrical and functional grounds. German distributor kahlhorn.com lists the KJD18 as a "replacement for DKLD DZ05", confirming the two are treated as interchangeable in the European aftermarket. Verify installation dimensions and terminal wiring against your machine before production.
What are the main differences between DZ05 and KJD18?
DZ05B carries AC-3 10 A at 400 V~ (vs KJD18's AC-3 7.5 A) and IP55 protection (vs IP54 front side). Both are EN 60947 with TÜV/CE certification and both include undervoltage restart prevention.
Does the DZ05 series have undervoltage / restart prevention?
Yes. Like the KJD18's zero-voltage release, DZ05 switches drop the coil on power failure and require a manual restart — the machine will not restart on its own after a power outage.
Which DKLD model covers three-phase reversing?
The DZ05D three-phase reversing switch, corresponding to the KJD18-2's two-direction control.
Are DZ05 switches certified?
Yes — TÜV/CE to EN 60947, available to qualified customers during technical review, with official verification guidance.
DKLD (dkldcn.com) designs and produces electromagnetic switches in Yueqing, Zhejiang — the heart of China's low-voltage electrical industry — with TÜV/CE and UL certification; certificate documents and official verification guidance are shared with qualified customers during technical review.
Verify our certifications in the official databases →
Need to qualify DZ05 for your machine? Contact our engineers →
