Emergency Stop Switch Selection Guide: ISO 13850 Compliance for Power Tools & Machinery
Emergency Stop Switch Selection Guide: ISO 13850 Compliance for Power Tools & Machinery
An emergency stop is the one component on a machine that must work every single time, for the entire life of the equipment. This selection guide from DKLD Dongke Electric explains what ISO 13850 and IEC 60947-5-5 actually require of an E-stop switch, and how to specify the right electromagnetic switch for power tools, woodworking machines, mixers and industrial equipment.
Direct answer: Choose an emergency stop switch that (1) is a manually actuated, latching (push-pull or twist-release) device per ISO 13850, (2) is rated for the motor current it interrupts — for power tools typically 10 A or higher at 250 V~, (3) has an IP rating matched to the working environment (IP55 for dusty or washdown conditions), and (4) is certified to EN 61058 / IEC 60947-5-5 for the EU or UL 61058 for North America. See the official ISO 13850:2015 standard (Safety of machinery — Emergency stop function) for the full actuator and latching requirements, and IEC 60947-5-5 for positive opening of contacts. DKLD's DZ04-2D and DZ-6-2M series cover exactly this profile, with TÜV/CE and UL (cRUus) variants.
Key Points
- ISO 13850 requires E-stop actuators to be red with a yellow background, mushroom-head or palm type, and latching — the machine must not restart until the device is manually released.
- An E-stop is a risk-reduction measure, not a substitute for a guard or a main disconnect; it must stop the dangerous motion without creating new hazards.
- For single-phase power tools, a double-pole electromagnetic switch interrupts both poles — important for live-wire safety and for compliance-minded OEM buyers.
- Power-loss restart prevention (undervoltage protection) is a separate, increasingly demanded feature: the machine must not auto-restart after a power outage or voltage dip.
- IP55 (dust-protected, water-jet protected) is the practical minimum for woodworking, concrete, food-processing and outdoor equipment.
- Verify the switch's certificate covers your exact model and rating in the official registers (TÜV Certipedia; UL Product iQ) before production.
DKLD E-Stop Switch Family: Quick Comparison
| Model | Application | Rating | Protection | Certification |
|---|---|---|---|---|
| DZ04-2D | Power tools, single-phase machines | 10 A, 250 V~ | IP55 | TÜV + CE (EN 61058) |
| DZ04-1 | Push-button E-stop with mounting plate | 10 A class | IP55 | TÜV + CE |
| DZ05B | Power tools & industrial equipment | Motor-rated | IP55 | TÜV + CE |
| DZ07D / DZ07H | Motor control, large STOP panel option | AC-3 rated (12 A @ 400 V~ class) | IP55 | TÜV + CE |
| DZ-6-2M / LDZ-6-2M | Double-pole E-stop + restart prevention | 16(15) A, 250 V~ / 18 A, 127 V~ | IP55 | TÜV/CE (EN 61058, EN 60947) · cRUus (UL 61058) |
ISO 13850 Requirements Checklist
- Red actuator on yellow background — no other color coding on the actuator.
- Latching action: once pressed, it stays open until deliberately released (twist, pull, or key).
- Direct opening operation where required (positive opening of the contacts per IEC 60947-5-5).
- Accessible from the hazard area without reaching over the machine.
- Restart must require a separate, deliberate action — never automatic.
Specifying E-Stop for Your OEM Project
Send DKLD your motor type (single-phase or three-phase), operating voltage, locked-rotor/starting current and enclosure requirement — DKLD's engineers match the switch family (DZ04, DZ05, DZ07 or DZ-6), confirm the certification scope, and provide samples for endurance testing before you commit tooling. For North America, specify the LDZ (cRUus, UL 61058) variants.
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.
