Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
Siemens Relay LFL 1.635 110V - Burner Controls
SiemensBurner Controls

Siemens Relay LFL 1.635 110V

Siemens LFL 1.635 is a burner control relay for gas, oil, or dual-fuel burners in medium to large power applications, operating at 110V with UV probe and ionization probe flame supervision for reliable combustion…

SKU 3G-CBM-05839

Brand
Siemens
Item
Relay LFL 1.635 110V
Category
Burner Controls
UNSPSC
40101833 — Boiler or heater igniter
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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
voltage
110V
application
Gas, oil or dual-fuel burners, medium to large power
product type
Burner control relay
flame supervision
UV probe QRA and ionization probe

Technical Documents

(1)
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

Siemens LFL 1.635 is a burner control relay for gas, oil, or dual-fuel burners in medium to large power applications, operating at 110V with UV probe and ionization probe flame supervision for reliable combustion monitoring.

Frequently Asked Questions

What is the Siemens LFL 1.635 110V burner control relay used for?

The Siemens LFL 1.635 is a burner control relay for gas, oil, or dual-fuel burners in medium to large power applications. It provides flame supervision using a UV probe QRA and ionization probe, suitable for intermittent operation and multi-stage or modulating burners in industrial heating systems.

What are the specifications of the Siemens LFL 1.635 110V?

The Siemens LFL 1.635 operates at 110V and is designed for gas, oil, or dual-fuel burners in medium to large power applications. It features flame supervision via UV probe QRA and ionization probe, and is intended for intermittent operation with at least one shutdown every 24 hours.

Where to buy Siemens LFL 1.635 110V in Singapore?

3G Electric supplies the Siemens LFL 1.635 110V burner control relay to Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this Siemens burner control relay for your industrial combustion system.

How to install the Siemens LFL 1.635 110V burner control relay?

Installation must be performed by qualified personnel only. Disconnect power before working on terminals, verify wiring compliance, and do not open the device. The reset button should be operated by hand only with force ≤10 N, and not held for more than 10 seconds to avoid damage.

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
Not sure this is the right part? Photo-identify it

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.

You might also need

Gas Trains & Valves Ignition Transformers Burner Controls Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
Relay LFL 1.333 110V
Siemens
Relay LFL 1.333 110V
Relay LFL 1.622 110V
Siemens
Relay LFL 1.622 110V
Relay LFL 1.322 110v
Siemens
Relay LFL 1.322 110v
Relay LFL 1.635
Siemens
Relay LFL 1.635
Relay LFL 1.335
Siemens
Relay LFL 1.335
Relay LFL 1.133
Siemens
Relay LFL 1.133

More from Siemens

View all Siemens parts
Cell QRB1A-A068B70B
Siemens
Cell QRB1A-A068B70B
Adapter KF8896
Siemens
Adapter KF8896
Relay LAL 2.14
Siemens
Relay LAL 2.14
Cell QRB1A-A150B70A
Siemens
Cell QRB1A-A150B70A
Relay LFL 1.335 110V
Siemens
Relay LFL 1.335 110V
Relay LFL 1.333
Siemens
Relay LFL 1.333
Siemens
Siemens
Flange for QRB1 (A)
Relay LFL 1.322
Siemens
Relay LFL 1.322

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first