Description
Overview
The Eaton Bussmann 170M3423 is a high speed square body semiconductor fuse rated at 630 A and 690 V AC, engineered specifically for the protection of solid-state power devices in demanding industrial drives and converter applications. Part of the proven Bussmann 170M Series, this Class aR fuse delivers an interrupt rating of 200 kA, ensuring reliable and rapid fault clearance before semiconductor junction damage can occur. Its 1×BN/50 bolt-in format enables straightforward panel integration in compact and high-density switchgear assemblies.
Key Features
- 630 A Current Rating — Handles high continuous load currents in heavy-duty semiconductor drive circuits without nuisance operation.
- 690 V AC Voltage Rating — Rated for standard industrial 690 V AC supply systems widely used in Indian manufacturing plants and process industries.
- 200 kA Breaking Capacity — Provides extremely high fault current interruption, protecting expensive power semiconductors even under severe short-circuit conditions.
- Class aR Fuse Classification — Optimised exclusively for semiconductor protection with a fast-acting characteristic that clears faults before I²t damage to thyristors or diodes.
- 1×BN/50 Square Body Format — Compact bolt-in construction simplifies installation and replacement in standard semiconductor fuse holders and bus bar assemblies.
- IEC 60269-4 Compliant — Meets international standards for high speed fuses used in semiconductor equipment, ensuring global acceptance.
- CE Marked and RoHS Compliant — Satisfies European regulatory requirements; safe for use in environmentally conscious manufacturing environments.
- IEC Rated and UL/CSA Listed — Dual certification supports installations governed by multiple national and international standards across India and export markets.
- No Fuse Indicator — Clean, minimal construction reduces cost and complexity where external monitoring or relay-based protection is already in place.
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 170M3423 |
| Series | Bussmann 170M |
| Amperage Rating | 630 A |
| Voltage Rating (AC) | 690 V |
| Interrupt Rating | 200 kA |
| Breaking Capacity | 200 kA |
| Fuse Class | Class aR |
| Fuse Type | High Speed Square Body |
| Construction | Square body 1×BN/50 format, bolt-in connections |
| Fuse Indicator | None |
| Standard | IEC 60269-4 |
| Compliances | CE Marked, RoHS Compliant |
| Certifications | IEC Rated, UL/CSA Listed |
| Application | Semiconductor protection, DC common bus, DC drives, power converters, rectifiers, VFDs, soft starters, thyristor stacks |
Applications & Selection Guide
The 170M3423 is the preferred choice for engineers specifying semiconductor protection in variable frequency drives (VFDs), soft starters, DC common bus systems, rectifier bridges, and thyristor stacks operating on 690 V AC supplies. Its Class aR rating means it is purpose-built for semiconductor-only protection — it should be used in conjunction with upstream gG or gL fuses or circuit breakers that handle overload protection for the broader circuit, as aR fuses do not provide full range overcurrent protection on their own.
In Indian industrial applications, the 170M3423 is widely specified for large motor drive panels, steel plant thyristor converters, textile mill VFD cabinets, cement plant drive systems, and renewable energy power conditioning equipment. The 690 V rating aligns directly with the 660–690 V AC bus systems common in high-power process industry installations across Tamil Nadu, Maharashtra, Gujarat, and other manufacturing hubs.
When selecting this fuse, verify that the continuous current drawn by the semiconductor device does not exceed 630 A and that the prospective short-circuit current at the point of installation is within the 200 kA breaking capacity. Always confirm compatibility with the fuse holder mechanical format (1×BN/50 bolt-in) and consult Shansen Enterprises for I²t coordination data if matching with upstream protective devices.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — guaranteed genuine Bussmann product with full traceability
- 100% genuine products supplied with manufacturer warranty and documentation
- Pan-India delivery including Tamil Nadu, Karnataka, Andhra Pradesh, Maharashtra, Gujarat, and all other states
- WhatsApp technical support for product selection, I²t coordination, and fuse holder matching
- Competitive bulk pricing for panel builders, OEMs, EPC contractors, and system integrators
Compatible Products & Accessories
- Eaton Bussmann 170M Series fuse holders and DIN rail mounting bases for 1×BN/50 format
- Eaton Bussmann 170M Series bus bar adaptors and isolation links
- Upstream gG class branch circuit fuses for full range overcurrent protection coordination
- Eaton Bussmann fuse monitoring and blown fuse indication modules
- Eaton Din rail and panel mount fuse holders compatible with 170M square body format
- Eaton Bussmann 170M Series companion fuses for three-phase rectifier and thyristor bridge configurations
Frequently Asked Questions
What does Class aR mean for the 170M3423 fuse?
Class aR denotes a partial range current-limiting fuse optimised exclusively for the protection of semiconductor devices such as thyristors, diodes, SCRs, and IGBTs. Unlike general purpose gG fuses, an aR fuse is designed to open extremely quickly at high fault currents, limiting the I²t energy let-through to a level that the semiconductor junction can survive. The 170M3423 must always be paired with an upstream overcurrent protective device (such as a gG fuse or MCCB) that handles overload and low-level short-circuit protection for the rest of the circuit.
Is the 170M3423 suitable for DC applications such as DC common bus drives?
Yes. The Eaton Bussmann 170M3423 is explicitly rated for DC common bus and DC drive protection applications. The 170M Series is a well-established choice for DC semiconductor protection in industrial drives, rectifier assemblies, and regenerative converter systems. For DC voltage ratings and derating factors specific to your application, consult the Eaton Bussmann 170M Series datasheet or contact Shansen Enterprises for application engineering support.
What is the fuse holder or mounting format required for the 170M3423?
The 170M3423 uses a 1×BN/50 square body bolt-in format. This is a standardised high speed semiconductor fuse body size, and it must be installed in a compatible Eaton Bussmann fuse holder or bus bar mounting system designed for the 1×BN/50 form factor. Using an incompatible holder can compromise electrical contact quality, thermal performance, and safety. Shansen Enterprises can supply both the fuse and the correct matching holder — contact us to confirm the complete assembly for your panel design.
Does the 170M3423 carry UL and CSA certification in addition to IEC?
Yes. The Eaton Bussmann 170M3423 is IEC rated and UL/CSA listed, making it suitable for installations that must comply with North American standards in addition to the IEC 60269-4 standard. This dual certification is valuable for Indian OEMs and exporters who build panels for international markets or for projects with multinational EPC specifications requiring both IEC and UL compliance.
How does the 200 kA interrupt rating of the 170M3423 compare to standard industrial fuses?
The 200 kA interrupt rating of the 170M3423 is significantly higher than the 80–100 kA ratings typical of standard LV general purpose fuses. This high breaking capacity is necessary in high-power semiconductor installations — such as large DC drives, thyristor converters, and industrial rectifiers — where the available fault current at the semiconductor terminals can be very high due to low source impedance. Specifying a fuse with adequate interrupt rating is a critical safety requirement; the 170M3423’s 200 kA rating covers the vast majority of industrial power systems encountered in India.
How do I order the Eaton Bussmann 170M3423 from Shansen Enterprises?
You can request a quote for the Eaton Bussmann 170M3423 directly from Shansen Enterprises by clicking the WhatsApp button on this page or by emailing us through the contact form. Please mention the catalog number 170M3423, the quantity required, and your delivery location anywhere in India. Our team in Coimbatore will confirm availability, lead time, and pricing promptly. Bulk orders for panel builders and OEMs are welcome, and we provide proper GST invoices with full manufacturer documentation.
