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Siemens Safety Switch: Fusible, 30 A, Three Phase, 240V AC, Galvanized Steel - Fusible Safety Switches
SiemensFusible Safety Switches

Siemens Safety Switch: Fusible, 30 A, Three Phase, 240V AC, Galvanized Steel

The SIEMENS DTF321 is a 30 A, three-phase fusible safety switch rated for 240V AC, housed in galvanized steel for indoor use. 3G Electric interprets this demand and delivers it across 14 industrial departments, with…

SKU 3G-OTH-28495

Brand
Siemens
Item
Safety Switch: Fusible, 30 A, Three Phase, 240V AC, Galvanized Steel
Category
Fusible Safety Switches
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Technical Specifications

Siemens
Manufacturer Part Number
DTF321
Type
30 A, Three Phase, Galvanized Steel, Indoor
AC
240V
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS DTF321 is a 30 A, three-phase fusible safety switch rated for 240V AC, housed in galvanized steel for indoor use. 3G Electric interprets this demand and delivers it across 14 industrial departments, with specialist depth in controls as an authorised distributor alongside brands like ABB and Schneider.

Frequently Asked Questions

What is the SIEMENS DTF321 safety switch used for?

The SIEMENS DTF321 is a fusible safety switch designed for indoor industrial applications. It provides a visible disconnect means for three-phase electrical circuits up to 240V AC and 30 A, ensuring safe maintenance and isolation in manufacturing, HVAC, and commercial facilities.

What are the specifications of the SIEMENS DTF321 safety switch?

The SIEMENS DTF321 is a 30 A, three-phase, fusible safety switch rated for 240V AC. It features a galvanized steel enclosure for indoor use. The manufacturer part number is DTF321, and it is built by Siemens for reliable circuit isolation and overcurrent protection.

Where to buy the SIEMENS DTF321 safety switch worldwide?

You can source the SIEMENS DTF321 safety switch through 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 on this Siemens fusible safety switch.

How to install the SIEMENS DTF321 safety switch?

Install the SIEMENS DTF321 safety switch by mounting the galvanized steel enclosure on a sturdy indoor surface. Ensure the circuit is de-energized, connect three-phase conductors to the line and load terminals per local codes, and verify proper fuse sizing for 240V AC operation. Always 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 fusible safety switches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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