ROPEX RES-403/400VAC Temperature Controller — Part No. 740303

The ROPEX RES-403/400VAC is a discontinued RESISTRON temperature controller used to regulate compatible heat sealing bands in industrial packaging machinery. Manufacturer part number 740303 identifies the version designed for a 400 VAC supply.

Looking for this controller to maintain an existing machine? EMK-Parts focuses on sourcing obsolete and discontinued industrial spare parts. Contact us to check sourcing options for the RES-403/400VAC, including the condition of the available unit, pricing and delivery time.

The RES-403 controls sealing band temperature by measuring changes in electrical resistance, without a separate temperature sensor. AUTOCAL calibration and AUTOTUNE control optimization support consistent operation in compatible heat sealing systems.

Product details

• Manufacturer: ROPEX

• Series: RESISTRON

• Model: RES-403/400VAC

• Manufacturer part number: 740303

• Product lifecycle status: discontinued

• Nominal supply voltage: 400 VAC

• Temperature setting: external potentiometer

• Actual temperature output: 0–10 VDC

• Mounting: 35 mm DIN rail

• Integrated alarm and fault diagnostics

Replacement enquiries

When requesting a replacement, please send a clear photo of the existing controller’s nameplate, including its voltage rating and any MOD designation. Matching the model, modification and machine configuration is essential when selecting a replacement unit.