... 3) On-off temperature difference: 3°C- 10°C 4) Fitting size:28±0.25mm5) Rated at 16A/250V ... pin. 8) Insulation resistance≥100MΩ9)Control type: mechanical temperature controller 10)Contact resistance:≤50MΩ 11) Operating life: ≥ 100, ... )WHD-85 B,E,F,H 30-85°C ≤4.5°C ±5°C 300-3000 (50)WHD-93 ... B,E,F,H 30-93°C≤4.5°C ±5°C 300-3000 (45)WHD-110 ... B,E,F,H 30-110°C ≤4.5°C ±5°C 300-3000 (40)WHD-250 ...