Danfoss RT121E mechanical vacuum pressure switch with bellows sensing element, single-pole double-throw (SPDT) gold contact and auto reset, ATEX Category 2 Zone 1 certified. Regulating range -1 to 0 bar; G 3/8 male pressure connection (ISO 228-1); enclosure IP66. Danfoss code number 017-618466.
| Brand | Danfoss |
| Model | RT121E pressure switch |
| Code number | 017-618466 |
| Regulating range (Pe) | -1 to 0 bar |
| Maximum working pressure | 7 bar (100 psig) |
| Contact function | SPDT gold (single-pole double-throw) |
| Reset | Auto |
| Differential | 0.09 to 0.4 bar (adjustable) |
| Pressure sensing element | bellows |
| Pressure connection | G 3/8 male (ISO 228-1) |
| Enclosure | IP66 |
| Ambient temperature range | -20 to +65 degC (-4 to +149 degF) |
| Cable entry | 2 x Pg 13.5 |
| Hazardous-area | ATEX Category 2, Zone 1 |
| Intrinsically safe contact load | Ci=0.5 nF; Ii=0.5 A; Li=0.2 uH; Pi=1 W; Ui=29 V |
| Maximum test pressure | 8 bar (116 psig) |
| Standards | EN 60947-4, EN 60947-5 |
| Approvals | CE, EAC, ATEX |
| Product type | RT121E |
| Product group | Switches and thermostats |
| Max. test pressure | 116.0 psig |
| Max. test pressure Pe | 8.0 bar |
| Max. working pressure | 7.0 bar |
| CE mark | Yes |
| REACH candidate-list substances | Lead (CAS no. 7439-92-1) |
| Net weight | 0.858 kg |
| EAN | 5702428046558 |
| Contact rating | Ci=0.5 nF; Ii=0.5 A; Li=0.2 uH; Pi=1 W; Ui=29 V |
| EEE category | 5 small equipment (any external dimension < 50 cm) |
| Electrical conn | |
| Male/Female | Female |
| Electrical connection | Screwed cable entry |
| Electrical connection size | 2xPg 13.5 |
| Electrical connection standard | DIN 40430 |
| Electrical spec. standard | EN 60947-4/-5 |
| EN 60947 electrical properties | Insulation: 400V; Pollution degree: 3; Rated impulse voltage: 4 kV; Short circuit prot, fuse: 10A |
| EN 60947 wiring properties | Flex, ferrules: 0.2-1.5 mm2; Flex, no ferrules: 0.2-2.5 mm2; Solid/stranded: 0.2-2.5 mm2 |
| Enclosure rating IP | IP66 |
| EX Sales text | -20C<ta<+65C; II 2G Ex ia IIC T6...T1 Gb |
| In scope of WEEE | Yes |
| Pressure connection size | 3/8 |
| Material | Bellows sensing element |
| Pressure rating | 7 bar |
| Temperature range | -20 to +65 degC |
| IP rating | IP66 |
| Primary standard | EN 60947-5 |
| Thread standard | ISO 228-1 |
| MOQ | 1 |
G 3/8 male (ISO 228-1) pressure connection. Confirm range and reset type against application.