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Siemens Relay LDU 11 523A27 - Burner Controls

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SiemensBurner Controls
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Siemens Relay LDU 11 523A27

Siemens LDU 11 523A27 is a burner control relay for industrial combustion systems, rated 220V to 240V AC with 2.5 VA~ operating power consumption. Features internal fuse T6.3H250V and supports any mounting position…

SKU 3G-CBM-05833

Also listed as: REL 15142 · REL-15142

Brand
Siemens
Item
Relay LDU 11 523A27
Category
Burner Controls
UNSPSC
40101833 — Boiler or heater igniter

Technical Specifications

Siemens
model
LDU11.523A27
fuse internal
T6.3H250V (DIN EN 60127)
supply voltage
220V~ -15% to 240V~ +10%
fuse external max
10A slow
mounting position
any
power consumption test
3.5 VA~
power consumption operation
2.5 VA~
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

Siemens LDU 11 523A27 is a burner control relay for industrial combustion systems, rated 220V to 240V AC with 2.5 VA~ operating power consumption. Features internal fuse T6.3H250V and supports any mounting position, fitting OEM and retrofit applications.

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.

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