Clearance Creepage: ipc pcb
pcb ext uncoated 31 50V to pcb internal 0 15V
Minimum electrical clearance and creepage distances per IEC 60664-1:2020 (insulation coordination for low-voltage equipment up to 1000V AC / 1500V DC) and IPC-2221B (PCB conductor spacing). Indexed by insulation type (functional, basic, supplementary, reinforced, double, ipc_pcb), pollution degree (1–3), overvoltage category (I–IV), and working voltage (V). Clearance is shortest air-path distance; creepage is shortest surface-path distance. Critical for PCB layout, enclosure design, and product safety compliance (CE, UL, CSA).
| insulation type | record id | application note | clearance mm (mm) | standard | working voltage V (V) |
|---|---|---|---|---|---|
| ipc pcb | pcb ext uncoated 31 50V | B2 external uncoated; 31-50V" | 0.6 | IPC-2221B | 40 |
| ipc pcb | pcb ext uncoated 51 100V | B2 external uncoated; 51-100V" | 0.6 | IPC-2221B | 75 |
| ipc pcb | pcb internal 0 15V | B1 internal conductors 0-15V; any board layer" | 0.05 | IPC-2221B | 7.5 |
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