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Siemens DTNF221 Non-Fusible Safety Switch - Non-Fusible Safety Switches
SiemensNon-Fusible Safety Switches

Siemens DTNF221 Non-Fusible Safety Switch

The SIEMENS DTNF221 is a 30 A, single-phase, non-fusible safety switch rated for 240V AC. Housed in a galvanized steel enclosure for indoor use, it provides a reliable disconnect solution for industrial electrical…

SKU 3G-OTH-129127

Also listed as: DTNF 221 · DTNF-221

Brand
Siemens
Item
DTNF221 Non-Fusible Safety Switch
Part Number
DTNF221
Category
Non-Fusible Safety Switches
Available to Order
Also known as:DTNF221Siemens
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Technical Specifications

Siemens
Manufacturer Part Number
DTNF221
Type
30 A, Single Phase, Galvanized Steel, Indoor
AC
240V

Technical Documents

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

Product Description

The SIEMENS DTNF221 is a 30 A, single-phase, non-fusible safety switch rated for 240V AC. Housed in a galvanized steel enclosure for indoor use, it provides a reliable disconnect solution for industrial electrical circuits. 3G Electric interprets your demand for this Siemens safety switch, sourcing it with accountability across our 14 industrial departments.

Frequently Asked Questions

What is the Siemens DTNF221 safety switch used for?

The Siemens DTNF221 is a non-fusible safety switch used to safely disconnect electrical power for maintenance or emergency shutdown in industrial and commercial applications. It is designed for single-phase, 240V AC circuits up to 30 A, providing a visible disconnect means for personnel safety.

What are the specifications of the Siemens DTNF221 safety switch?

The Siemens DTNF221 is a non-fusible safety switch rated for 30 A, single phase, 240V AC. It features a galvanized steel enclosure for indoor use. The manufacturer part number is DTNF221. This switch provides a reliable disconnect for branch circuit protection in industrial settings.

Where to buy the Siemens DTNF221 safety switch worldwide?

You can source the Siemens DTNF221 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; we supply genuine Siemens components for your industrial needs.

How to install the Siemens DTNF221 safety switch?

Install the Siemens DTNF221 safety switch in a dry indoor location on a sturdy surface. Ensure the power is off before wiring. Connect line and load conductors per the wiring diagram on the switch. Use appropriate conduit fittings and torque terminals to manufacturer specs. Always follow local electrical codes.

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
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Siemens Products

3G Electric supplies Siemens non-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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