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JWDrive supplies MICROMASTER 4xx (420/430/440) parts for Siemens systems worldwide — quote within 24 hours, worldwide dispatch in 3–7 days. This series is discontinued by the manufacturer; we source remaining stock and propose functional replacements when originals run out.
6SE6 4xx drives Discontinued series — sourced & supported
The MICROMASTER 4xx (420/430/440) series is a discontinued family of variable frequency drives by Siemens, known for its robust performance in industrial applications. It is commonly used in pump, fan, and conveyor systems for precise speed and torque control.
How we support this series
Send us any part number from this series — CPU, I/O module, drive, terminal or sensor. You get a quote in 24 hours with lead time, warranty, and — when the original is obsolete or over long lead time — a functional replacement proposal matched on specs, mounting and communication.
Discontinued, obsolete or overpriced part? Our engineers propose functional replacements that keep your line running — same function, matched specs, faster delivery.
Selection help, retrofit and migration guidance for legacy platforms — from Siemens S5 to S7-1500, from PLC-5 to CompactLogix. We speak your automation language.
Stocked items dispatch within 2 business days of payment confirmation, tracked worldwide by DHL, FedEx or air freight. Consolidated packing for mixed parts lists.