DZ08 Series Electromagnetic Switches: Drop-in Replacement Guide for KEDU KOA1 / KOA2 / KOA7 / KOA8
DZ08 Series Electromagnetic Switches: Drop-in Replacement Guide for KEDU KOA1 / KOA2 / KOA7 / KOA8
If your machines currently ship with KEDU KOA electromagnetic switches — single-phase and three-phase applications from mixers and saws to pumps and compressors — this application guide from DKLD Dongke Electric explains how the DZ08 series maps model-for-model onto the KOA line, what to verify before switching, and how to qualify samples for mechanical and electrical life before you commit a production line.
Direct answer: Yes — DKLD's DZ08 series is an application-compatible alternative for the KEDU KOA series of electromagnetic switches, covering the KOA1, KOA2, KOA7 and KOA8 application slots: single-phase 16 A 250 V~ and three-phase 380 V applications, including reversing models, with the same mounting specifications, the same control class and EN 61058 certification. Pair the DZ08 model with the KOA application slot on the datasheet — DZ08-2A3 (16 A 250 V~) covers the KOA1/KOA2 slot, the compact DZ08-1A2/1A3/1A4 cover the KOA7 slot, DZ08-3A7 (16 A 250 V~) covers the KOA7 slot, DZ08-4A5 (three-phase 380 V~) covers the KOA8 slot, and the reversing slots are covered by DZ08-4ZA5 (three-phase reversing) and DZ08-3A6 (three-phase reversing with integrated plug). Confirm rating and footprint, then request samples and run your own mechanical and electrical life comparison before production.
Key Points
- Full KOA coverage: the DZ08 series spans the KOA1/KOA2 (single-phase) and KOA7/KOA8 (single-phase and three-phase) application slots in one family.
- Single-phase and three-phase: 16 A 250 V~ models for single-phase slots; 380 V~ three-phase models for KOA8-style applications.
- Reversing variants: DZ08-4ZA5 (three-phase reversing) and DZ08-3A6 (three-phase reversing with integrated plug) cover reversing machinery.
- Same control class: DZ08 keeps the same control class and mounting specification as the KOA incumbents — no panel rework expected, but always confirm the datasheet.
- EN 61058 certified: the DZ08 family is certified under EN 61058, the standard European buyers expect for switch components.
- Qualify before committing: request samples and compare mechanical and electrical life against the incumbent KOA switch on your own test profile.
DZ08 to KEDU KOA Mapping (From the DKLD Product Catalog)
| DZ08 model | Rating / configuration | KEDU KOA counterpart |
|---|---|---|
| DZ08-2A3 | 16 A, 250 V~ | KOA1 / KOA2 |
| DZ08-2A2 / 2A4 | Single-phase variants | KOA1 / KOA2 |
| DZ08-1A2 / 1A3 / 1A4 | Compact type | KOA7 |
| DZ08-3A7 | 16 A, 250 V~ | KOA7 |
| DZ08-4A5 | Three-phase, 380 V~ | KOA8 |
| DZ08-4ZA5 | Three-phase reversing | Reversing slot |
| DZ08-3A6 | Three-phase reversing, integrated plug | Reversing with plug |
| DZ08-2D2 / 2D3 / 2D4 / 2C2 / 2C3 / 2C4 | KOA-series variants | KOA series |
| DZ08-4C5 / 4C6 / 4D5 / 4D6 / 5A / 7 | Extended variants | KOA-series application slots |
Qualification Checklist Before Switching a Machine Line
- Identify the exact incumbent KOA model and its rating on the machine's datasheet.
- Map it to the DZ08 counterpart using the table above; for non-standard KOA variants, confirm the match with DKLD's engineers.
- Verify mounting dimensions, cutout and terminal layout against the incumbent switch.
- Confirm the control class and electrical rating match the motor's start/stop profile.
- Request samples and run a mechanical and electrical life comparison on your own test profile.
- For EU machines, keep the EN 61058 certificate in the component file and update the machine's technical documentation.
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.
