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Siemens MICROMASTER 420 VFD 6SE6420-2UD21-5AA1 front view with display and buttons

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Siemens 6SE6420-2UD21-5AA1

by Siemens

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OverviewExperience advanced motor management and energy conservation with the Siemens MICROMASTER 420 Variable Frequency Drive (VFD), model 6SE6420-2UD21-5AA1. This robust 1.5kW VFD provides exceptional precision in speed adjustment for numerous motor-driven processes. Designed for seamless operation within a 380-480V AC power environment, it is the perfect component for industries aiming to boost performance, lower running expenses, and extend machinery life. Its sophisticated architecture includes an accessible interface for simple setup and diagnosis, alongside comprehensive integrated safeguards, ensuring consistent and secure functionality across diverse industrial contexts. From essential production lines to crucial HVAC systems, the MICROMASTER 420 exemplifies Siemens' dedication to pioneering solutions and industrial excellence.Key Features Optimal 1.5kW Output: Ideal for smaller to mid-sized motor applications, delivering efficient and regulated power. Broad Voltage Acceptance (380-480V AC): Guarantees compatibility and steady performance across various industrial electrical pathways. Accurate Motor Governance: Achieve precise speed administration, smooth acceleration, and controlled deceleration for improved process oversight. Extensive Integrated Protection: Offers advanced safeguards against overload, short circuits, and thermal events to shield your motors and VFD. User-Friendly Interface: Simplifies configuration, monitoring, and troubleshooting, reducing operational downtime and complexity. Compact & Modular Construction: Allows for straightforward installation and integration into existing or new control panels, maximizing spatial efficiency. Energy Conservation: Contributes significantly to power savings by tailoring motor speed to demand, decreasing electricity consumption. Technical Specifications Product Category: Variable Frequency Drive (VFD) Part Number: 6SE6420-2UD21-5AA1 Manufacturer: Siemens Series: MICROMASTER 420 Power Rating: 1.5kW (2 HP) Input Voltage: 380-480V AC, 3-phase Output Frequency: 0-650 Hz Control Method: V/f Control, Sensorless Vector Control Cooling System: Air cooling with integrated fan Certifications: Adheres to international norms for motor regulation and industrial automation Applications Industrial Automation Systems: Provides accurate and efficient speed regulation for a wide array of automated machinery and procedures. Pumps & Fan Installations: Ensures energy-efficient performance and gentle, governed starting/stopping, minimizing wear and tear. Conveyor Mechanisms: Delivers precise acceleration and deceleration, vital for material handling and process flow optimization. Manufacturing Equipment: Suitable for various machines needing adjustable speed control, such as blenders, extruders, and textile apparatus. HVAC Implementations: Enhances climate control effectiveness by specifically managing fan and pump speeds in heating, ventilation, and air conditioning uses. General Purpose Motor Management: A versatile option for any situation demanding dependable and customizable motor velocity. Why Choose This Model? Unequaled Dependability: As a Siemens product, the 6SE6420-2UD21-5AA1 is constructed to the highest benchmarks of quality and resilience, assuring enduring operation. Superior Performance: Experience accurate and fluid motor supervision, leading to heightened operational effectiveness and product quality. Cost-Efficient Operation: Substantially reduce energy usage and maintenance expenses through optimized motor handling and robust protection functions. Simple Integration: Its small footprint and modular structure facilitate easy installation and seamless incorporation into diverse industrial setups. Extended Motor Lifespan: Gentle start and stop capabilities, combined with excellent motor safeguarding, prolong the operational life of your valuable motors. Order NowEquip your operations with the Siemens MICROMASTER 420 VFD for unmatched control and efficiency. Contact us today or add to cart to improve your industrial applications.FAQWhat types of motors is the 6SE6420-2UD21-5AA1 compatible with?This VFD is designed for use with a wide range of standard industrial AC induction motors, providing flexible control across various applications.Can I easily integrate this VFD into an existing system?Absolutely. Its compact and modular design, along with a user-friendly interface, makes integration into both new and established control panels straightforward.Does this model help with energy savings?Yes, by precisely optimizing motor speed according to demand, the MICROMASTER 420 significantly contributes to reduced electricity consumption and lower operating costs.What protective features are included?The unit features comprehensive built-in protections including advanced overload, short circuit, and thermal safeguarding to ensure the longevity of both the motor and the VFD itself.

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PRODUCT DETAILS

Siemens 6SE6420-2UD21-5AA1

Overview

This is a genuine Siemens component from the Variable Frequency Drives family. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.

Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.

Key Features

  • Genuine Siemens catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader Siemens automation ecosystem
  • Engineered to integrate inside Variable Frequency Drives installations

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Siemens equipment. Where applicable, confirm:

  • Input/output voltage and current rating
  • Communication protocol and network role
  • Mounting form factor and footprint
  • Operating temperature, humidity, and IP rating
  • Required certifications (UL, CE, ATEX, marine, etc.)

Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.

Replacement Information

Three ways to source this part through PalmPartsSolution:

  1. Exact replacement — same Siemens catalog number, new or refurbished, tested and warrantied
  2. Form-fit-function equivalent — alternate revision or build that drops in without code changes
  3. Engineered migration — current-generation Siemens platform with documented conversion notes for the Variable Frequency Drives family

Contact our engineering team if you need help choosing between these tracks.

Technical Specifications

  • Product Category: Variable Frequency Drive (VFD)
  • Part Number: 6SE6420-2UD21-5AA1
  • Manufacturer: Siemens
  • Series: MICROMASTER 420
  • Power Rating: 1.5kW (2 HP)
  • Input Voltage: 380-480V AC, 3-phase
  • Output Frequency: 0-650 Hz
  • Control Method: V/f Control, Sensorless Vector Control
  • Cooling System: Air cooling with integrated fan
  • Certifications: Adheres to international norms for motor regulation and industrial automation

Applications

  • Industrial Automation Systems: Provides accurate and efficient speed regulation for a wide array of automated machinery and procedures.
  • Pumps & Fan Installations: Ensures energy-efficient performance and gentle, governed starting/stopping, minimizing wear and tear.
  • Conveyor Mechanisms: Delivers precise acceleration and deceleration, vital for material handling and process flow optimization.
  • Manufacturing Equipment: Suitable for various machines needing adjustable speed control, such as blenders, extruders, and textile apparatus.
  • HVAC Implementations: Enhances climate control effectiveness by specifically managing fan and pump speeds in heating, ventilation, and air conditioning uses.
  • General Purpose Motor Management: A versatile option for any situation demanding dependable and customizable motor velocity.

Why Choose the 6SE6420-2UD21-5AA1?

  • Unequaled Dependability: As a Siemens product, the 6SE6420-2UD21-5AA1 is constructed to the highest benchmarks of quality and resilience, assuring enduring operation.
  • Superior Performance: Experience accurate and fluid motor supervision, leading to heightened operational effectiveness and product quality.
  • Cost-Efficient Operation: Substantially reduce energy usage and maintenance expenses through optimized motor handling and robust protection functions.
  • Simple Integration: Its small footprint and modular structure facilitate easy installation and seamless incorporation into diverse industrial setups.
  • Extended Motor Lifespan: Gentle start and stop capabilities, combined with excellent motor safeguarding, prolong the operational life of your valuable motors.

Availability & Shipping

  • In stock: 6SE6420-2UD21-5AA1 ready for immediate dispatch from our Florida warehouse.
  • Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
  • Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
  • Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
  • Buy with confidence: Every 6SE6420-2UD21-5AA1 ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Siemens

This VFD is designed for use with a wide range of standard industrial AC induction motors, providing flexible control across various applications.

Machine down? We ship parts the same day.

New, surplus, and refurbished Siemens inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.

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PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.

Product Condition & Firmware

All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.

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