The TRANBERG® TEF 9208 is a compact, self-regulating enclosure heater in acid-resistant stainless steel AISI 316L with temperature class T4, for installation inside enclosures rated IP54 or higher in Zone 1, Zone 2 and safe area. It protects electrical and electronic components from freezing, condensation and corrosion, and the self-regulating element reduces its output as the ambient temperature rises, so it cannot overheat. The slim profile suits narrow cabinets, and mounting is four M6 screws. Developed and manufactured at our own factory.
Three versions, 50 to 600 W
Choose by connection: flying lead (50–300 W) for termination in an existing Ex e junction box, junction box (100–600 W) with terminals, cable gland and drain plug fitted, or junction box and thermostat with a built-in ambient air thermostat switching at +5 °C or +15 °C. Nominal output is stated at still air and 0 °C. The 600 W unit is a sandwich model with two heating plates. Need T3 or IP66 on the heater itself? See the TEF 9207. Need 120 V? See the TEF 9209.
Application
- Inside equipment enclosures and cabinets (IP54 or higher), to prevent condensation and provide climatic control
- Frost protection of instruments and electronics
- Zone 1, Zone 2 and safe area: offshore, marine and industrial installations
Features and benefits
- Self-regulating heating element: prevents overheating and saves energy
- Temperature class T4
- Low profile, easy to fit inside cabinets
- AISI 316L / EN 1.4404 housing, low maintenance
- Operational ambient temperature −50 °C to +50 °C, withstands +80 °C de-energised
Technical data (TPS5003 / TPS5004 / TPS5005)
| Ex protection | II 2G Ex 60079-30-1 IIC T4 Gb (flying lead); eb (junction box); eb mb (junction box and thermostat) |
|---|---|
| Nominal voltage | 230 V 50/60 Hz |
| Nominal output | 50–600 W at still air, 0 °C |
| Material | AISI 316L / EN 1.4404 |
| Ingress protection | For use in enclosures with min. IP54 |
| Operational ambient temperature | −50 °C to +50 °C |
| Max. withstand ambient temperature | +50 °C energised, +80 °C de-energised |
| Electrical connection | Flying lead 2.5 mm² (1 or 1.5 m), or junction box with 2+2 × 4 mm², 2 × 2.5 mm² and 3 × 10 mm² PE terminals |
| Cable entries (junction box models) | 1 × TEF E204/622 M25/D2/9 mm, 1 × TEF 7302 M25 drain plug, TEF 650 M20/M25 stopping plugs |
| Thermostat (thermostat models) | Ambient air sensing, switching at +5 °C or +15 °C, hysteresis +5/−5 °C |
| Mounting | 4 × M6 screws; sandwich model with washers in the mounting brackets |
Approvals and certificates
- ATEX: CML 22ATEX3623X
- IECEx: IECEx CML 22.0096X
- UKCA: see certificate
- Datasheets, dimension drawings, certificates and user manual TUM7132 are listed above the table
Installation notes
The supply circuit shall include an electrical protection device according to IEC/EN 60079-30-1 clause 4.3. The free end of a flying lead must be terminated in an Ex e junction box. For heaters with a thermostat, use a max. 16 A circuit breaker with a breaking capacity of at least 1500 A. Never install the junction box models with the box facing upwards.
Optional thermostat
For the flying lead and junction box versions, an external JUMO ExTherm-AT capillary thermostat (part no. 50295391, datasheet TTD6717, −20 to +50 °C, 230 V AC 16 A) can be supplied. Ask us for a quote together with the heater.
