Description
Overview
The Eaton Bussmann 170M5812D belongs to the globally trusted 170M Series of high speed square body semiconductor fuses, designed specifically to protect power semiconductor devices where conventional fuses are too slow. Rated at 630 A and 690 V AC with a 200 kA breaking capacity, this Class aR fuse conforms to IEC 60269-4 and is housed in a DIN 43620 DIN 2 format body with knife blade contacts for secure, low-resistance mounting. The dual indicator (Type D) provides immediate visual confirmation of a blown fuse, reducing diagnostic time on the shop floor.
Key Features
- 630 A Current Rating — handles high continuous load currents in large power converter and drive systems
- 690 V AC Rated Voltage — compatible with standard industrial three-phase 690 V distribution networks
- 200 kA Interrupt Rating — exceptional breaking capacity protects against high prospective fault currents
- Class aR Rating — current-limiting action specifically optimised for semiconductor device protection
- DIN 43620 DIN 2 Format with Knife Blade Contacts — standardised body ensures drop-in compatibility with DIN-rated fuse holders and busbars
- Dual Indicator Type D — two-point visual fault indication enables fast fault localisation without instruments
- IEC 60269-4 Certified — independently verified performance for semiconductor protection applications
- CE Marked and RoHS Compliant — meets European safety and environmental directives for global project use
- Ultra-Fast Clearing Speed — limits I²t energy let-through to protect thyristors, IGBTs, diodes, and MOSFETs from thermal damage
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 170M5812D |
| Series | Bussmann 170M |
| Amperage Rating | 630 A |
| Rated Voltage AC | 690 V |
| Interrupt Rating | 200 kA |
| Breaking Capacity | 200 kA |
| Fuse Class | Class aR |
| Construction / Format | DIN 43620 DIN 2, Knife Blade Contacts |
| Fuse Indicator | Dual Indicator (Type D) |
| Standard | IEC 60269-4 |
| Compliances | CE Marked, RoHS Compliant |
| Certifications | IEC Rated |
| Application | Semiconductor protection, DC common bus, DC drives, power converters, rectifiers, VFDs, soft starters, thyristor stacks |
Applications & Selection Guide
The 170M5812D is the preferred choice for protecting power semiconductor modules in high-current industrial applications. Its Class aR rating means it is designed exclusively for semiconductor protection — not for general circuit protection — making it ideal for DC common bus architectures, variable frequency drives (VFDs), soft starters, thyristor stacks, rectifier bridges, and IGBT-based power converters operating at 690 V. The 200 kA interrupt rating ensures safe fault clearance even in high-impedance industrial installations where prospective fault currents are large.
In the Indian industrial context, this fuse is widely specified in steel rolling mills, paper and pulp plants, water treatment facilities, chemical process industries, and large HVAC installations across manufacturing hubs including Coimbatore, Chennai, Pune, and Ahmedabad. Panel builders and OEMs designing drives panels, MCC panels, and power converter cabinets will find the DIN 43620 DIN 2 knife blade format integrates cleanly with standard DIN-rated fuse switch disconnectors.
When selecting between 170M Series ratings, always match the fuse I²t let-through value to the semiconductor device’s published withstand I²t. For 630 A loads on 690 V AC systems with 200 kA prospective fault current, the 170M5812D provides a reliable, standards-compliant solution. Contact Shansen Enterprises for application-specific selection guidance and coordination studies.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — genuine products with full manufacturer traceability
- 100% genuine Eaton Bussmann stock supplied with warranty
- Pan-India delivery to all major industrial cities and project sites
- WhatsApp technical support for product selection, cross-referencing, and application queries
- Bulk pricing available for panel builders, OEMs, EPC contractors, and system integrators
Compatible Products & Accessories
- Eaton Bussmann 170M Series fuse holders and fuse switch disconnectors (DIN 43620 DIN 2 compatible)
- Eaton Bussmann 170M Series fuses — adjacent ampere ratings (500 A, 710 A) for drive panel coordination
- DIN 43620 knife blade contact busbars and mounting hardware
- Eaton Bussmann fuse indicator monitoring modules for remote blown-fuse signalling
- Semiconductor-grade heat shrink and insulation sleeves for knife blade terminations
- Eaton motor protection circuit breakers and contactors for upstream coordination
Frequently Asked Questions
What does Class aR mean for the Eaton Bussmann 170M5812D?
Class aR (current-limiting, semiconductor protection range) indicates that the fuse is specifically engineered to protect semiconductor devices by clearing faults within a partial cycle, limiting the I²t energy let-through to levels that delicate devices such as thyristors, IGBTs, and diodes can survive. Unlike Class gG general-purpose fuses, Class aR fuses do not provide overload protection and are always used in conjunction with upstream overcurrent protective devices. The 170M5812D must be applied strictly for semiconductor protection duties as defined in IEC 60269-4.
What is the interrupt rating of the 170M5812D and why does it matter?
The 170M5812D has an interrupt rating of 200 kA, meaning it can safely clear fault currents up to 200,000 amperes without rupturing or causing collateral damage. In industrial installations fed from large transformers or with low system impedance — common in Indian steel, petrochemical, and large manufacturing plants — prospective fault currents can be very high. A 200 kA interrupt rating ensures the fuse remains the weakest link in the protection chain and clears reliably under worst-case fault conditions.
Is the 170M5812D suitable for VFD and soft starter input protection in India?
Yes. The 170M5812D is specifically recommended for semiconductor input and output protection in variable frequency drives (VFDs) and soft starters. At 630 A and 690 V AC, it covers large drive ratings commonly used in Indian industries such as pumps, fans, compressors, and conveyor systems. Always verify the fuse I²t rating against the drive manufacturer’s specified semiconductor withstand I²t to ensure coordinated protection. Shansen Enterprises can assist with drive-to-fuse coordination for projects across India.
What fuse holder or fuse switch disconnector is compatible with the 170M5812D?
The 170M5812D is manufactured to DIN 43620 DIN 2 format with knife blade contacts. It is compatible with Eaton Bussmann DIN 43620 DIN 2 fuse holders, fuse switch disconnectors, and busbar-mounted fuse bases designed for this body size. Always confirm the contact spacing, blade dimensions, and current rating of the holder match the DIN 2 specification before installation. Shansen Enterprises can recommend and supply compatible holders alongside the fuse.
What does the dual indicator (Type D) on the 170M5812D do?
The dual indicator (Type D) provides two independent visual trip indicators — typically striker pins or flags — that protrude or change state when the fuse element clears. This allows technicians to identify a blown fuse quickly during panel inspection without using test instruments. Some installations also wire the indicators to remote monitoring circuits or auxiliary contacts to generate an alarm or shutdown signal when the fuse operates, improving system availability and reducing mean time to repair.
How do I order the Eaton Bussmann 170M5812D from Shansen Enterprises?
You can request a quotation directly from Shansen Enterprises by clicking the WhatsApp button on this page or by sending an email with the catalog number 170M5812D and your required quantity. Our team will respond with pricing, availability, and delivery lead time for your location anywhere in India. For bulk orders, panel builder accounts, or project-specific requirements in Coimbatore or other cities, please mention your project details so we can offer the best pricing and logistics support.
