Siemens 6ES5498-1AB11 | SIMATIC S5 Arc Suppression Module

The Siemens 6ES5498-1AB11 protects digital output contacts from inductive load damage. This arc suppression module connects directly across solenoids, relays, or contactor coils. It limits voltage spikes generated during switching operations. Consequently, you can extend the service life of your output modules significantly. This device works with both AC and DC loads without additional components.

Technical Specifications Overview

Parameter	Detailed Specification
Model	Siemens 6ES5498-1AB11
Category	SIMATIC S5 Arc Suppression Module / Snubber
Number of Channels	1 (single load protection)
Load Voltage Range (AC)	24V to 230V AC
Load Voltage Range (DC)	24V to 110V DC
Maximum Load Current	5 A (continuous)
Suppression Type	RC (resistor-capacitor network)
Resistor Value	100 Ω (typical)
Capacitor Value	0.1 µF (typical)
Connection Type	Two-wire screw terminal
Dimensions (approx.)	45 mm x 35 mm x 20 mm
Weight	0.03 kg (30 grams)
Energy Absorption	Dissipates inductive flyback energy as heat
Operating Temperature	-20°C to 70°C

Functional Features and Protection Benefits

The Siemens 6ES5498-1AB11 mounts directly across your inductive load terminals. This simple connection requires no additional wiring or external components. The RC network absorbs high-voltage spikes and limits voltage rise rates. Furthermore, the module reduces electromagnetic interference from frequent switching operations.

You should install this suppressor on every inductive load connected to transistor outputs. Relays, solenoids, and small motors all benefit from arc suppression. The module does not affect normal load operation or switching speed noticeably. Moreover, the compact housing fits easily inside crowded junction boxes.

Installation Guidelines and Application Notes

First, disconnect power from your control circuit completely. Next, identify the inductive load you want to protect. Then, connect the Siemens 6ES5498-1AB11 across the load terminals in parallel. Finally, secure the module using adhesive tape or a mounting bracket.

The two-wire design makes polarity irrelevant for AC applications. For DC circuits, connect the module with any orientation. You can use one suppressor per output channel for maximum protection. However, a single module can protect multiple loads switching simultaneously.

This arc suppression module works best with the Siemens 6ES5451-4UA14 output card. It also protects relay contacts on mixed I/O modules. The passive design requires no external power supply at all. You should replace the module if you see physical damage or melting signs.