We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

Siemens 3UB81334HW2 IEC Electronic Overload Relay - IEC Electronic Overload Relays
SiemensIEC Electronic Overload Relays

Siemens 3UB81334HW2 IEC Electronic Overload Relay

The SIEMENS Overload Relay is an IEC electronic overload relay with 3 poles and a 1NO/1NC auxiliary contact form. Designed for Frame Size B, it features a maximum voltage rating of 690V AC and screw terminals. This…

SKU 3G-OTH-45161

Brand
Siemens
Item
3UB81334HW2 IEC Electronic Overload Relay
Category
IEC Electronic Overload Relays
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 — 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
3UB81334HW2
Frame Size
B
Compatible Contactors
Frame Size B
Auxiliary Contact Form
1NO/1NC
Maximum Voltage Rating
690V AC
Thermal Units Required
Not Applicable to Electronic Type Overload Relays
Terminal Connection Type
Screw Terminals
Compatible Contactor Series
Class 48 Overload Relays

Technical Documents

No technical documents available for this product.
Request documentation
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

The SIEMENS Overload Relay is an IEC electronic overload relay with 3 poles and a 1NO/1NC auxiliary contact form. Designed for Frame Size B, it features a maximum voltage rating of 690V AC and screw terminals. This electronic type does not require thermal units and is compatible with Class 48 Overload Relays and Frame B contactors.

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 the SIEMENS 3UB81334HW2 overload relay used for?

The SIEMENS 3UB81334HW2 is an IEC electronic overload relay used to protect motors from overcurrent and phase loss. It is designed for Frame Size B contactors and is commonly applied in industrial motor control panels, conveyors, pumps, and HVAC systems where reliable electronic protection is required.

What are the specifications of the SIEMENS 3UB81334HW2 overload relay?

The SIEMENS 3UB81334HW2 is a 3-pole electronic overload relay with a 1NO/1NC auxiliary contact form. It has a maximum voltage rating of 690V AC, uses screw terminals, and is compatible with Frame Size B contactors and Class 48 Overload Relays. No thermal units are required for this electronic type.

Where to buy the SIEMENS 3UB81334HW2 overload relay worldwide?

You can source the SIEMENS 3UB81334HW2 overload relay from 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine Siemens components for industrial applications.

How to select the correct SIEMENS overload relay for a motor?

To select the correct SIEMENS overload relay, match the frame size to your contactor (Frame Size B for the 3UB81334HW2), verify the motor full-load current range, and ensure the auxiliary contact configuration (1NO/1NC) suits your control circuit. Electronic types like this one do not require thermal units and offer adjustable protection settings.

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 iec electronic overload relays. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
SIEMENS Overload Relay: Electronic Protection, 3 Poles, 1NO/1NC, Frame Size B, 13 A – 52 A (MPN 3UB81334FW2)
Siemens
SIEMENS Overload Relay: Electronic Protection, 3 Poles, 1NO/1NC, Frame Size B, 13 A – 52 A (MPN 3UB81334FW2)
SIEMENS Overload Relay: Electronic Protection, 2 Poles, 1NO/1NC, Frame Size A (MPN 3UB88134BB2)
Siemens
SIEMENS Overload Relay: Electronic Protection, 2 Poles, 1NO/1NC, Frame Size A (MPN 3UB88134BB2)
SIEMENS Overload Relay: Electronic Protection, 2 Poles, 1NO/1NC, Frame Size A1 (MPN 3UB88234DW2)
Siemens
SIEMENS Overload Relay: Electronic Protection, 2 Poles, 1NO/1NC, Frame Size A1 (MPN 3UB88234DW2)
SIEMENS Overload Relay: Electronic Protection, 2 Poles, 1NO/1NC, Frame Size A, 0.25 A – 1 A (MPN 3UB88134AB2)
Siemens
SIEMENS Overload Relay: Electronic Protection, 2 Poles, 1NO/1NC, Frame Size A, 0.25 A – 1 A (MPN 3UB88134AB2)
SIEMENS Overload Relay: Electronic Protection, 2 Poles, 1NO/1NC, Frame Size A1, 3 A – 12 A (MPN 3UB88234CW2)
Siemens
SIEMENS Overload Relay: Electronic Protection, 2 Poles, 1NO/1NC, Frame Size A1, 3 A – 12 A (MPN 3UB88234CW2)
SIEMENS Overload Relay: Electronic Protection, 3 Poles, 1NO/1NC, Frame Size A1, 10 A – 40 A (MPN 3UB81234EW2)
Siemens
SIEMENS Overload Relay: Electronic Protection, 3 Poles, 1NO/1NC, Frame Size A1, 10 A – 40 A (MPN 3UB81234EW2)

More from Siemens

View all Siemens parts
IEC electronic overload relay for motor protection against overload and phase imbalance. Rated 1 A to 4 A, 690 V AC, with 1 normally open and 1 normally closed auxiliary contact. Designed for frame size S00 contactors, with screw terminal connections. Suitable for industrial motor control applications requiring electronic overload protection
Siemens
IEC electronic overload relay for motor protection against overload and phase imbalance. Rated 1 A to 4 A, 690 V AC, with 1 normally open and 1 normally closed auxiliary contact. Designed for frame size S00 contactors, with screw terminal connections. Suitable for industrial motor control applications requiring electronic overload protection
IEC electronic overload relay for motor protection against overcurrent and phase loss. Three-pole design with 1 normally open and 1 normally closed auxiliary contact. Rated for 690V AC, with screw terminal connections. Compatible with Frame Size A contactors and Class 48 overload relays. No thermal units required
Siemens
IEC electronic overload relay for motor protection against overcurrent and phase loss. Three-pole design with 1 normally open and 1 normally closed auxiliary contact. Rated for 690V AC, with screw terminal connections. Compatible with Frame Size A contactors and Class 48 overload relays. No thermal units required
IEC electronic overload relay with 3 poles, 1 normally open and 1 normally closed auxiliary contact. Rated for 690V AC, with screw terminals. Designed for use with Frame Size A1 contactors and Class 48 overload relays. No thermal units required
Siemens
IEC electronic overload relay with 3 poles, 1 normally open and 1 normally closed auxiliary contact. Rated for 690V AC, with screw terminals. Designed for use with Frame Size A1 contactors and Class 48 overload relays. No thermal units required
IEC electronic overload relay for motor protection against overcurrent and phase loss. Three-pole design with screw terminals, auxiliary contact form 1NO/1NC, and maximum voltage rating of 690V AC. Compatible with Frame Size B contactors and Class 14 starters. No thermal units required
Siemens
IEC electronic overload relay for motor protection against overcurrent and phase loss. Three-pole design with screw terminals, auxiliary contact form 1NO/1NC, and maximum voltage rating of 690V AC. Compatible with Frame Size B contactors and Class 14 starters. No thermal units required
IEC electronic overload relay for motor protection in industrial control panels. Three-pole device with screw terminals, rated 690V AC, adjustable current range 3 A to 12 A. Features 1NO/1NC auxiliary contacts and is compatible with SIRIUS contactors of frame size S00. No thermal units required
Siemens
IEC electronic overload relay for motor protection in industrial control panels. Three-pole device with screw terminals, rated 690V AC, adjustable current range 3 A to 12 A. Features 1NO/1NC auxiliary contacts and is compatible with SIRIUS contactors of frame size S00. No thermal units required
IEC electronic overload relay for motor protection, rated 50 A to 200 A at 1000V AC. Frame size S6 with screw terminals and 1NO/1NC auxiliary contacts. Compatible with SIRIUS contactors of same frame size. No thermal units required; electronic type provides overcurrent and phase imbalance protection in industrial motor control applications
Siemens
IEC electronic overload relay for motor protection, rated 50 A to 200 A at 1000V AC. Frame size S6 with screw terminals and 1NO/1NC auxiliary contacts. Compatible with SIRIUS contactors of same frame size. No thermal units required; electronic type provides overcurrent and phase imbalance protection in industrial motor control applications
IEC electronic overload relay for motor protection. Three-pole unit with screw terminals, rated 3 A to 12 A, 690V AC maximum. Frame size S0 with 1NO/1NC auxiliary contacts. Suitable for use with SIRIUS contactors of same frame size in industrial motor control applications
Siemens
IEC electronic overload relay for motor protection. Three-pole unit with screw terminals, rated 3 A to 12 A, 690V AC maximum. Frame size S0 with 1NO/1NC auxiliary contacts. Suitable for use with SIRIUS contactors of same frame size in industrial motor control applications
IEC electronic overload relay for three-phase motor protection against overcurrent and phase loss. Three poles, frame size A1, current range 5.5 A to 22 A. Auxiliary contact form 1NO/1NC, maximum voltage rating 690V AC, screw terminals. Compatible with Class 14 Starters and frame size A1 contactors. No thermal units required
Siemens
IEC electronic overload relay for three-phase motor protection against overcurrent and phase loss. Three poles, frame size A1, current range 5.5 A to 22 A. Auxiliary contact form 1NO/1NC, maximum voltage rating 690V AC, screw terminals. Compatible with Class 14 Starters and frame size A1 contactors. No thermal units required