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Specifications

BrandMIRO (Miro Electric / Zhejiang Mingrong)
ModelsRX1 / RX2 (dimensionally and functionally identical)
FunctionSpring-pin mechanical striker + integrated auxiliary microswitch signals fuse operation
MountingAlongside fuse link, under end-cap screws (DIN 43653-style), adjustable base
StandardsDIN 43653 mounting interface
Output UsePLC input, alarm annunciator, shunt trip or interlock circuit
Product TypeFuse striker alarm indicator for NH-type (knife-blade contact) fuse links
Rated VoltageAC 50 Hz, 1000 V insulation voltage
Auxiliary Contacts1 NO + 1 NC microswitch (dry contact)
Typical ApplicationsDrives, rectifier stacks, UPS, soft starters, converter panels, MCCs, distribution boards
Compatible Fuse SizesNH000 through NH4 (all NH knife-blade contact fuse sizes)

Compatible With

NH-type (knife-blade contact) fuse links sizes NH000-NH4NH fuse bases and switch-disconnectors with striker pin provisionPairs stocked: Mersen Protistor PC32UD/URD seriesSiemens SITOR 3NE seriesEaton Bussmann 170M series

Description

Sourced and supplied by Al Imran Enterprises, Lahore, Pakistan. The MIRO RX1/RX2 is a fuse striker alarm indicator rated for AC 50 Hz service up to 1000 V insulation voltage. It is NOT a fuse link -- it is the mechanical striker/monitoring accessory that mounts on NH-type (knife-blade contact) fuse links from sizes NH000 through NH4 and converts the fuse operation into an electrical alarm signal. When a fast-acting semiconductor fuse or general-purpose NH fuse operates, nothing may look different from outside the enclosure. The RX1/RX2 sits alongside the fuse link and clamps under the link's end-cap screws (DIN 43653-style fixing). The moment the fuse element melts, the unit's spring-loaded pin fires and trips an integrated auxiliary microswitch -- typically 1 NO + 1 NC dry contact -- that your PLC, annunciation relay or trip circuit sees instantly. The adjustable base accommodates minor dimensional variation between NH fuse families. Typical duties include AC side monitoring of variable frequency drives, DC drives, rectifier stacks, UPS systems and soft starters running at 690 V class and above, where fast fuse-blow detection protects downstream silicon and cuts fault-finding from hours to minutes. Also suitable for general NH fuse alarm and interlock circuits in switchboards, MCCs and distribution panels. We hold these strikers in physical stock together with the NH semiconductor fuse links they pair with, including Protistor and SITOR-class links from Mersen, Siemens and Eaton. Wiring takes minutes: the microswitch terminals land on standard screw connections and the dry contact drops straight into any 24 V PLC input or relay coil. Tell us the fuse family you are protecting and we will confirm mounting fitment and supply the matched pair. Contact us for pricing, lead times, and technical compatibility checks.

RX1/RX2-1000V — Frequently Asked Questions

What does the RX1 / RX2 striker actually do?▾
It converts the mechanical operation of a semiconductor fuse into an electrical signal: a spring-loaded pin fires when the fuse element melts and trips an integrated microswitch (typically 1 NO + 1 NC) wired to your PLC, annunciator or trip circuit.
How is it mounted?▾
The unit sits parallel to the fuse link and clamps beneath the link's end-cap screws - the classic DIN 43653-style striker position used on square-body ultra-rapid fuse links. An adjustable base absorbs small dimensional differences.
What voltage rating does it cover?▾
It is rated for AC 50 Hz service up to 1000 V, which suits 690/700 V class drive, rectifier, UPS and soft-start installations using high-speed semiconductor fuses.
Is this the branded item shown in your photos?▾
Yes. Our physical stock carries the maker label 菩熔电器 (Miro Electric) and ships exactly as photographed; we verify the nameplate on every unit before dispatch.
Do you supply the matching square-body fuse links too?▾
Yes. We stock 690/700 V class ultra-rapid links from Mersen, Siemens and Eaton and can ship link and striker together so the protection pair stays matched.

Need it urgently?

We specialize in hard-to-find parts. Contact us directly for expedited sourcing of RX1/RX2-1000V.

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