## Common ground
All options refer to power distribution units (PDUs) that manage and distribute electrical power, typically in industrial, commercial, or IT environments.
## Options at a glance
**8536.30 – Built-in protection**
- **Defining trait:** Includes integrated circuit breakers or overload protection.
- **Typical examples:** PDU with built-in trip switches, surge-protected distribution board.
- **Best fit when:** Safety and automatic fault interruption are critical (e.g., server rooms, high-load equipment).
**8537.10 – High-voltage distribution with components**
- **Defining trait:** Designed for voltages ≤1,000 V and contains multiple active electrical components (switches, relays, fuses).
- **Typical examples:** Industrial control panels, multi-output distribution systems with monitoring.
- **Best fit when:** The unit integrates multiple functional elements beyond simple power splitting.
**8544.42 – Standard power strip with plug**
- **Defining trait:** Basic PDU with standardized sockets (e.g., IEC 60320) and a plug-end power cable.
- **Typical examples:** Desktop power strips, UPS-compatible wall strips.
- **Best fit when:** Simple, plug-and-use distribution for low-power devices (e.g., office equipment).
## Key differences
| Feature | 8536.30 | 8537.10 | 8544.42 |
|--------------------------|---------------------|-----------------------------|------------------------|
| Protection type | Built-in breaker/overload | None specified (assumed basic) | None specified |
| Voltage level | ≤1,000 V | ≤1,000 V | ≤1,000 V |
| Internal components | Minimal (protection only) | Multiple active elements | None (passive) |
| Use case | Safety-critical | Complex distribution | Simple end-use |
## How to choose
- Does it have a built-in circuit breaker or overload protection? → 8536.30
- Does it contain multiple active components (e.g., relays, switches, fuses)? → 8537.10
- Is it a basic plug-and-use power strip with standard sockets and cable? → 8544.42
## Overlaps & pitfalls
- A PDU with both built-in protection *and* multiple components may fit both 8536.30 and 8537.10.
- 8544.42 is often confused with 8536.30 if it includes surge protection, but lacks active components.
- **Priority:** Choose based on the product’s MAIN function—protection (8536.30), complexity (8537.10), or simplicity (8544.42)