Is the Siemens Relay LFL 1.635 available from 3G Electric?

Yes — 3G Electric supplies genuine Siemens products with in-stock availability on common SKUs and worldwide shipping.

How do I get a quote for the Siemens Relay LFL 1.635?

Click "Request a Quote" on this page or add the product to your RFQ cart. Our engineers will respond within 24 hours with pricing, lead times, and technical recommendations.

Does 3G Electric provide technical support for burner controls?

Yes, our team of experienced engineers provides full technical support including product selection, installation guidance, commissioning, and after-sales service for all burner controls we distribute.

SiemensBurner Controls

Siemens Relay LFL 1.635

Siemens LFL1.635 is a burner control safety relay for gas, oil, or dual-fuel burners with UV probe or ionization flame monitoring. It supports modulating and multi-stage burner operation with integrated air damper…

SKU 3G-CBM-05825

Also listed as: REL 15122 · REL-15122

Brand

Siemens

Item

Relay LFL 1.635

Technical Specifications

Siemens

type

Burner control safety relay 

model

LFL1.635 

features

Air damper control, modulating/multi-stage burner support 

application

Gas, oil, or dual-fuel burners 

flame monitoring

UV probe QRA or ionization 

View Full Spec Sheet

Technical Documents

(2)

Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.

Talk to an engineer

Ask a question

Siemens Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

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

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.

Browse all Siemens products →Contact our engineers →