ABB RT5/32 is a compact unpolarised transil-diode surge suppressor for 12–32 V DC conventional contactor coils, providing rapid voltage clipping and high-frequency interference attenuation.
£48.76
The ABB RT5/32, order code 1SBN050020R1000, is a compact transil-diode surge suppressor designed to protect DC-operated contactor control circuits from transient overvoltages. It reduces voltage peaks generated when an energised contactor coil is switched off, helping protect electronic devices, insulation and sensitive control components.
Switching an inductive contactor coil releases stored electromagnetic energy that can produce steep, high-voltage surges. The RT5/32 provides very fast voltage clipping to attenuate steep wavefronts and high-frequency interference while offering good energy absorption for reliable industrial control-system protection.
Designed for conventional DC contactors with a rated control circuit voltage of 12–32 V DC, the RT5/32 uses an unpolarised suppression circuit for straightforward installation. It clips onto the top or side of a compatible ABB contactor or contactor relay without changing the host device’s overall dimensions.
Contactor coils are inductive loads that store electromagnetic energy while energised. When the coil circuit opens, this energy can generate a steep transient voltage capable of disrupting electronic controls, degrading insulation or damaging sensitive circuit components.
The ABB RT5/32 uses a transil diode to clamp the resulting voltage peak rapidly and attenuate high-frequency interference. Its unpolarised design, good energy absorption and compact clip-on mounting make it suitable for protecting low-voltage DC contactor circuits in industrial automation equipment.
| Manufacturer | ABB |
|---|---|
| Series | RT5 |
| Model | RT5/32 |
| Order code | 1SBN050020R1000 |
| Product type | Contactor coil surge suppressor |
| Suppression component | Transil diode |
| Rated control circuit voltage | 12–32 V DC |
| Polarity | Unpolarised |
| Mounting type | Clip-on top or side mounting |
| Compatible devices | ASL09, ASL12, ASL16, VASL09, VASL12, VASL16, NSL and GAE75 |
| Operating temperature | −20 to +70 °C |
| Dimensions (W × H × D) | 30.25 × 10.5 × 32.4 mm |
| Weight | 0.015 kg |
| EAN | 3471522121608 |
The RT5/32 suppresses transient overvoltages generated when a DC-operated contactor coil is switched off, helping protect control-system components and reduce electrical interference.
The surge suppressor is designed for contactor control circuits rated from 12–32 V DC.
The RT5/32 uses a transil diode to provide rapid voltage clipping and attenuate steep transient wavefronts and high-frequency interference.
No. The RT5/32 uses an unpolarised suppression system, simplifying its installation in compatible DC contactor circuits.
The suppressor clips onto the top or side of a compatible ABB contactor or contactor relay without changing the host device’s overall dimensions.
ABB RT5 surge suppressors provide rapid and dependable transient-voltage control for DC contactor coils, helping protect industrial automation equipment and improve control-system reliability.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...