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Siemens Relay LME 21 350C2 - Burner Controls
SiemensBurner Controls

Siemens Relay LME 21 350C2

Siemens LME 21 350C2 is a burner control relay for small to medium gas or gas/oil burners with intermittent operation. It provides flame supervision via ionization probe or QRA flame probe with AGQ3 device, serving…

SKU 3G-CBM-05843

Brand
Siemens
Item
Relay LME 21 350C2
Part Number
350C2
Category
Burner Controls
UNSPSC
40101833 — Boiler or heater igniter
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Siemens
Manufacturer Part Number
350C2
operation
Intermittent
application
Gas or gas/oil burners, single or two-stage, small to medium power
product type
Burner control relay
flame supervision
Ionization probe or QRA flame probe with AGQ3 device

Technical Documents

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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

Siemens LME 21 350C2 is a burner control relay for small to medium gas or gas/oil burners with intermittent operation. It provides flame supervision via ionization probe or QRA flame probe with AGQ3 device, serving single or two-stage combustion applications in industrial heating systems.

Frequently Asked Questions

What is the Siemens LME 21 350C2 burner control relay used for?

The Siemens LME 21 350C2 is a burner control relay used for flame supervision and safety control in small to medium gas or gas/oil burners with intermittent operation. It supports single or two-stage combustion applications in industrial heating systems, using an ionization probe or QRA flame probe with AGQ3 device.

What are the specifications of the Siemens LME 21 350C2?

The Siemens LME 21 350C2 is an intermittent-operation burner control relay for gas or gas/oil burners, single or two-stage, small to medium power. It provides flame supervision via ionization probe or QRA flame probe with AGQ3 device. It includes under-voltage detection, air pressure monitoring, remote electrical reset, and multi-color fault display.

Where to buy the Siemens LME 21 350C2 in Singapore?

You can source the Siemens LME 21 350C2 burner control relay through 3G Electric in Singapore. We handle logistics, customs clearance, and delivery to your facility, providing technical support for industrial heating applications. Contact us for availability and lead time on this Siemens burner control relay.

How to install the Siemens LME 21 350C2 burner control relay?

Installation of the Siemens LME 21 350C2 must be performed by qualified specialists only. Before wiring, isolate the system from the main power supply and ensure it cannot be re-energized accidentally. Do not open, modify, or tamper with the device. Follow the manufacturer's datasheet for proper mounting and connection.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks
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Siemens Products

3G Electric supplies Siemens burner controls. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
This Siemens SIRIUS 3RT safety contactor is rated 150 A with 3 poles and a coil voltage of 23-26V AC/DC. It is designed for use in emergency-stop and safety circuits to safely disconnect machinery. No integrated surge suppression is included. Typical applications include industrial automation, conveyor systems, and process control
Siemens
This Siemens SIRIUS 3RT safety contactor is rated 150 A with 3 poles and a coil voltage of 23-26V AC/DC. It is designed for use in emergency-stop and safety circuits to safely disconnect machinery. No integrated surge suppression is included. Typical applications include industrial automation, conveyor systems, and process control
3-pole IEC magnetic contactor rated 16 A at 120V AC, part of the SIRIUS 3RT safety contactor series. Designed for safety-related switching and isolation in industrial machinery safety circuits, such as emergency stop and guard door monitoring. No integrated surge suppression
Siemens
3-pole IEC magnetic contactor rated 16 A at 120V AC, part of the SIRIUS 3RT safety contactor series. Designed for safety-related switching and isolation in industrial machinery safety circuits, such as emergency stop and guard door monitoring. No integrated surge suppression
This Siemens SIRIUS 3RT safety contactor is a 3-pole IEC magnetic contactor rated for 120V AC coil voltage and 96 A. It is designed for use in safety-related automation systems, such as emergency-stop circuits and machinery safety applications, to ensure reliable switching of motors and other loads. The contactor does not include integrated surge suppression
Siemens
This Siemens SIRIUS 3RT safety contactor is a 3-pole IEC magnetic contactor rated for 120V AC coil voltage and 96 A. It is designed for use in safety-related automation systems, such as emergency-stop circuits and machinery safety applications, to ensure reliable switching of motors and other loads. The contactor does not include integrated surge suppression

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