IP12 vs IP21
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP12 and IP21 are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 1 vs 2) and liquid protection (level 2 vs 1). IP12 is rated for > 50 mm — back of hand and dripping water at 15° tilt, while IP21 provides > 12.5 mm — finger and vertically dripping water.
Designed for environments requiring protection against solid objects larger than 50 mm and protection against vertically falling drops of water when the enclosure is tilted up to 15° from its normal position., IP12 is an IEC 60529 code combining solid level 1 with liquid level 2.
Designed for environments requiring protection against solid objects larger than 12.5 mm and protection against vertically falling drops of water. Dripping water shall have no harmful effects., IP21 is an IEC 60529 code combining solid level 2 with liquid level 1.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP12
1 — > 50 mm — Back of Hand
IP21
2 — > 12.5 mm — Finger
Liquid protection (second digit)
IP12
2 — Dripping Water at 15° Tilt
IP21
1 — Vertically Dripping Water
Dust-tight
IP12
No
IP21
No
Water-jet resistant
IP12
No
IP21
No
Submersible
IP12
No
IP21
No
Outdoor suitable
IP12
No
IP21
No
The exact difference (IP12 vs IP21)
Solid protection
IP12
Level 1 — > 50 mm — Back of Hand
IP21
Level 2 — > 12.5 mm — Finger
IP12 provides "> 50 mm — Back of Hand" (level 1), while IP21 provides "> 12.5 mm — Finger" (level 2). IP21 is 1 level higher.
Liquid protection
IP12
Level 2 — Dripping Water at 15° Tilt
IP21
Level 1 — Vertically Dripping Water
IP12 handles 0.3 mm/min drip rate (Dripping Water at 15° Tilt), while IP21 handles 0.1 mm/min drip rate (Vertically Dripping Water). IP12 provides 1 level more liquid protection.
NEMA equivalents
No direct NEMA equivalent.
Recommendation
IP12 and IP21 offer comparable overall protection; choose based on the specific protection dimension (dust vs. water) that matters most for your application.