Description
Overview
The Eaton Bussmann 170M3819D belongs to the renowned 170M Series of high speed square body semiconductor fuses, engineered specifically to protect thyristors, IGBTs, diodes, and other sensitive power semiconductor devices. Rated at 400 A and 690 V AC with a 200 kA breaking capacity, this fuse meets IEC 60269-4 standards and carries CE and RoHS compliance. Its DIN 43620 DIN 1 knife blade construction and dual Type D fuse indicator make it a robust, field-serviceable solution for high-power industrial installations across India.
Key Features
- 400 A Current Rating — handles high continuous load currents in power conversion systems without nuisance tripping
- 690 V AC Voltage Rating — suitable for standard industrial 3-phase 690 V distribution networks common in Indian plants
- 200 kA Interrupt Rating — exceptional breaking capacity provides maximum protection under worst-case fault conditions
- Class aR Semiconductor Protection — specifically designed for the fast-acting, partial-range protection of semiconductor devices that general-purpose fuses cannot provide
- DIN 43620 DIN 1 Knife Blade Construction — standardized form factor enables direct replacement and interchangeability within compatible DIN 1 fuse holders
- Dual Fuse Indicator (Type D) — provides visual and remote signaling of fuse operation, reducing troubleshooting time in panel maintenance
- IEC 60269-4 Compliant — meets international semiconductor fuse standards ensuring predictable and validated protection coordination
- CE Marked and RoHS Compliant — meets European safety directives and restricts hazardous substances, supporting green manufacturing initiatives
- Ultra-Low Let-Through Energy (I²t) — minimizes thermal and mechanical stress on connected semiconductor components during fault clearing
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 170M3819D |
| Series | Bussmann 170M |
| Amperage Rating | 400 A |
| Voltage Rating (AC) | 690 V |
| Interrupt Rating | 200 kA |
| Breaking Capacity | 200 kA |
| Fuse Class | Class aR |
| Construction / Form Factor | DIN 43620 DIN 1, 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 170M3819D is the correct choice when you need to protect power semiconductor assemblies operating at up to 400 A on 690 V AC industrial supplies. Its Class aR rating means it is designed exclusively for semiconductor protection — it clears faults in a fraction of a cycle, well before the semiconductor junction temperature can reach destructive levels. This makes it the preferred fuse for DC common bus drives, multi-axis servo systems, large rectifier bridges, and thyristor-controlled power supplies used extensively in Indian steel, cement, paper, textile, and water treatment industries.
When selecting this fuse for VFD or soft starter input protection, verify that the fuse holder or fuse base is rated for DIN 43620 DIN 1 format knife blade contacts and can accommodate the physical dimensions of the 170M Series body. The dual Type D indicator simplifies preventive maintenance routines by allowing operators to confirm fuse status both visually at the panel and remotely via a microswitch signal to a PLC or SCADA system.
For panel builders and OEMs in Coimbatore and across India designing drive panels, rectifier cabinets, or power converter assemblies, the 170M3819D offers a proven, globally certified protection solution. Shansen Enterprises stocks and supplies 170M Series fuses with fast turnaround, making it straightforward to maintain production uptime and meet delivery schedules on industrial projects.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner in Coimbatore — 100% genuine Bussmann products with full manufacturer traceability
- 100% genuine products supplied with warranty and original Eaton documentation
- Pan-India delivery — orders shipped to all major cities and industrial zones across India
- WhatsApp technical support — get wiring, selection, and coordination guidance before you buy
- Bulk pricing for panel builders, OEMs, and EPC contractors — contact us for volume quotes
Compatible Products & Accessories
- Eaton Bussmann 170M Series DIN 1 Fuse Holders and Fuse Bases (compatible with DIN 43620 knife blade format)
- Eaton Bussmann 170M Series Fuse Indicator Microswitch Accessories (Type D remote signaling)
- Eaton Bussmann 170M Series companion fuses at adjacent current ratings (350 A, 450 A, 500 A) for system coordination
- Eaton Bussmann BS88 Low Voltage Fuse Links for upstream branch circuit protection
- DIN rail mounted fuse monitoring relay modules compatible with Type D dual indicators
- Eaton drive protection fuse coordination guides for VFD and soft starter panel design
Frequently Asked Questions
What does Class aR mean and why is it required for semiconductor protection?
Class aR (aR = current limiting, partial range) fuses are designed specifically to protect semiconductor devices such as thyristors, IGBTs, and diodes. Unlike general-purpose gG fuses, aR fuses operate in a very short time window — typically within a half cycle of a fault — limiting the let-through energy (I²t) to a level that the semiconductor junction can survive. General-purpose fuses are too slow and allow enough energy through to destroy expensive power semiconductors. The 170M3819D Class aR rating ensures it will clear faults before the semiconductor reaches its rated I²t withstand threshold.
Is the 170M3819D suitable for DC bus protection in VFD panels?
Yes. The Eaton Bussmann 170M3819D is explicitly rated and applied for DC common bus and DC drive protection. When used on the DC bus of a VFD panel, verify the DC voltage rating of the specific fuse — consult the Eaton 170M Series datasheet or contact Shansen Enterprises for confirmation of the DC voltage capability of this catalog number before installation in a DC application.
What is the significance of the DIN 43620 DIN 1 form factor?
DIN 43620 DIN 1 defines the physical dimensions and knife blade contact geometry of the fuse body. This standardized format ensures that the 170M3819D fits directly into any fuse holder or fuse base designed for DIN 1 square body fuses, enabling straightforward replacement of equivalent-sized fuses from other manufacturers. It also guarantees consistent contact pressure and thermal performance across installations. Always confirm your existing fuse holder is rated for DIN 1 format before ordering.
What does the dual Type D fuse indicator on the 170M3819D do?
The dual Type D fuse indicator provides two methods of blown-fuse detection. The first is a visual indicator — a pin or flag that extends from the fuse body when the fuse has operated, visible through a panel window or on inspection. The second is an electrical microswitch output that can be wired to a PLC input, alarm relay, or SCADA system for remote monitoring. This combination significantly reduces fault diagnosis time in large drive panels and enables automated shutdown sequences to protect downstream equipment.
Can the 170M3819D replace other brands of DIN 1 format 400 A 690 V semiconductor fuses?
The 170M3819D can often replace equivalent DIN 43620 DIN 1 format semiconductor fuses from other manufacturers at 400 A and 690 V AC, provided the I²t characteristics, physical dimensions, and indicator type are compatible with your specific application and fuse holder. It is strongly recommended to cross-reference the I²t let-through energy values and melting characteristics before substituting fuses in a semiconductor protection circuit. Contact Shansen Enterprises with your existing fuse catalog number for a verified cross-reference.
How do I order the Eaton Bussmann 170M3819D from Shansen Enterprises?
Ordering the Eaton Bussmann 170M3819D from Shansen Enterprises is straightforward. Use the WhatsApp button on this page to send your inquiry directly — include the catalog number 170M3819D, required quantity, and delivery location. Alternatively, use the email quote button or visit shansenenterprises.com to contact our team. We serve customers across Coimbatore, Chennai, Bengaluru, Mumbai, Pune, Hyderabad, and all major industrial locations in India. Bulk orders and project-based procurement for panel builders and EPC contractors are welcome.
