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Siemens Auxiliary Switch: 1NO/1NC - Siemens Auxiliary Contacts
SiemensSiemens Auxiliary Contacts

Siemens Auxiliary Switch: 1NO/1NC

Siemens Siemens Auxiliary Contacts.

SKU 3G-OTH-38635

Brand
Siemens
Item
Auxiliary Switch: 1NO/1NC
Category
Siemens Auxiliary Contacts
Available to Order
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

Siemens
Manufacturer Part Number
49CE42SPDT

Technical Documents

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

Product Description

Siemens Siemens Auxiliary Contacts.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is a Siemens auxiliary switch used for?

A Siemens auxiliary switch like the 49CE42SPDT provides remote status feedback for contactors, relays, or circuit breakers. It signals open/closed positions to control panels, PLCs, or alarms in industrial automation, HVAC, and power distribution systems.

What are the specifications of the Siemens 49CE42SPDT auxiliary switch?

The Siemens 49CE42SPDT auxiliary switch is a 1NO/1NC configuration rated for 90 A max current (AC). It is a SPDT (single-pole double-throw) contact block designed for use with Siemens contactors and motor starters.

Where to buy Siemens auxiliary switches worldwide?

3G Electric supplies Siemens auxiliary switches like the 49CE42SPDT to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this genuine Siemens part.

How to install a Siemens auxiliary switch on a contactor?

Mount the Siemens auxiliary switch onto the designated slot on the contactor or relay. Ensure the switch aligns with the actuator. Wire the NO and NC terminals per your control circuit diagram. Always de-energize equipment before installation and follow Siemens guidelines.

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 siemens auxiliary contacts. 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
SIEMENS Auxiliary Switch: 2NC, 60 A Max Current (AC) (MPN 49ACR8)
Siemens
SIEMENS Auxiliary Switch: 2NC, 60 A Max Current (AC) (MPN 49ACR8)
SIEMENS Auxiliary Contact: 1NO/1NC, 10 A Max Current (AC), Side Mount, Side-Mounted (MPN 49AB11)
Siemens
SIEMENS Auxiliary Contact: 1NO/1NC, 10 A Max Current (AC), Side Mount, Side-Mounted (MPN 49AB11)
SIEMENS Auxiliary Switch: 1NO, Front Mount, Front-Mounted (MPN 3RH1921-GDC-2.5A)
Siemens
SIEMENS Auxiliary Switch: 1NO, Front Mount, Front-Mounted (MPN 3RH1921-GDC-2.5A)
SIEMENS Auxiliary Switch: 1NO/1NC, Side Mount, Side-Mounted (MPN 3RH1921-1KA11)
Siemens
SIEMENS Auxiliary Switch: 1NO/1NC, Side Mount, Side-Mounted (MPN 3RH1921-1KA11)
Front-mounted auxiliary contact block with 2 normally open and 2 normally closed contacts. Designed for Frame Size S0 and compatible with SIRIUS 3RT1 contactors. Used to add signal or control contacts for monitoring motor starters, status indication, or interlocking in industrial control panels
Siemens
Front-mounted auxiliary contact block with 2 normally open and 2 normally closed contacts. Designed for Frame Size S0 and compatible with SIRIUS 3RT1 contactors. Used to add signal or control contacts for monitoring motor starters, status indication, or interlocking in industrial control panels
Front-mounted auxiliary contact block for SIRIUS 3RT2 contactors. Provides 2 normally open and 2 normally closed contacts rated at 10 A AC. Used for adding signaling or control contacts in motor control and automation systems
Siemens
Front-mounted auxiliary contact block for SIRIUS 3RT2 contactors. Provides 2 normally open and 2 normally closed contacts rated at 10 A AC. Used for adding signaling or control contacts in motor control and automation systems

More from Siemens

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Front-mounted auxiliary contact block with 2 normally open and 2 normally closed contacts. Designed for use with SIRIUS 3RT2 contactors of frame size S2. Provides additional switching contacts for signaling, interlocking, or status feedback in motor control and automation systems
Siemens
Front-mounted auxiliary contact block with 2 normally open and 2 normally closed contacts. Designed for use with SIRIUS 3RT2 contactors of frame size S2. Provides additional switching contacts for signaling, interlocking, or status feedback in motor control and automation systems
This auxiliary contact block is designed for use with Siemens SIRIUS 3RV2 motor starter protectors. It provides additional switching contacts for monitoring and control functions in motor control panels, enabling status signaling, interlocks, or remote alarms
Siemens
This auxiliary contact block is designed for use with Siemens SIRIUS 3RV2 motor starter protectors. It provides additional switching contacts for monitoring and control functions in motor control panels, enabling status signaling, interlocks, or remote alarms
Auxiliary contact block with 2 normally open and 2 normally closed contacts, rated for 60 A AC. Used to signal the position of a main switching device in industrial control panels and motor control centers, enabling remote status indication and automation
Siemens
Auxiliary contact block with 2 normally open and 2 normally closed contacts, rated for 60 A AC. Used to signal the position of a main switching device in industrial control panels and motor control centers, enabling remote status indication and automation
Siemens auxiliary switch with one normally open and one normally closed contact, rated for 60 A AC maximum current. Designed for integration with contactors and relays in industrial control panels and motor starters to provide status feedback or interlocking signals
Siemens
Siemens auxiliary switch with one normally open and one normally closed contact, rated for 60 A AC maximum current. Designed for integration with contactors and relays in industrial control panels and motor starters to provide status feedback or interlocking signals
Auxiliary contact block with 2 normally open (2NO) contacts for use with SIRIUS 3RV2 Motor Starter Protectors. Provides switching functionality for status feedback, remote signaling, or interlocking in motor control systems
Siemens
Auxiliary contact block with 2 normally open (2NO) contacts for use with SIRIUS 3RV2 Motor Starter Protectors. Provides switching functionality for status feedback, remote signaling, or interlocking in motor control systems
Front-mounted auxiliary contact block with 2 normally open and 2 normally closed contacts. Designed for frame size S00 and compatible with SIRIUS 3RT2 series contactors. Used to signal contactor status, interlock circuits, or control auxiliary loads in motor control and automation systems
Siemens
Front-mounted auxiliary contact block with 2 normally open and 2 normally closed contacts. Designed for frame size S00 and compatible with SIRIUS 3RT2 series contactors. Used to signal contactor status, interlock circuits, or control auxiliary loads in motor control and automation systems
Front-mounted auxiliary contact block with 2 normally open (2NO) contacts, designed for use with SIRIUS 3RA6 Compact Starters. Provides additional control or signaling circuits in industrial motor control applications
Siemens
Front-mounted auxiliary contact block with 2 normally open (2NO) contacts, designed for use with SIRIUS 3RA6 Compact Starters. Provides additional control or signaling circuits in industrial motor control applications
Side-mounted auxiliary contact block with one normally open and one normally closed contact. Designed for Frame Size S00 and compatible with SIRIUS 3RT2 contactors. Used to add signal or control contacts for monitoring and interlocking in motor control applications
Siemens
Side-mounted auxiliary contact block with one normally open and one normally closed contact. Designed for Frame Size S00 and compatible with SIRIUS 3RT2 contactors. Used to add signal or control contacts for monitoring and interlocking in motor control applications