# Toshiba EMU (Roca Line)

> Rail rolling stock used in Argentina

**Wikidata**: [Q98716884](https://www.wikidata.org/wiki/Q98716884)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Toshiba_EMU_(Roca_Line))  
**Source**: https://4ort.xyz/entity/toshiba-emu-roca-line

## Summary  
The Toshiba EMU (Roca Line) is a class of electric multiple unit (EMU) railcars used on the Roca Line in Buenos Aires, Argentina. Introduced in 1985, these trains were manufactured through a collaboration between Japanese and Argentine companies including Toshiba, Nippon Sharyo, and Fabricaciones Militares. They operate on a 1,676 mm track gauge with 25 kV AC overhead electrification.

## Key Facts  
- **Service Entry**: November 8, 1985  
- **Country of Operation**: Argentina  
- **Operator**: Trenes Argentinos Operaciones  
- **Track Gauge**: 1,676 mm (5 ft 6 in)  
- **Electrification Type**: 25 kV, 50 Hz AC  
- **Manufacturers**: Toshiba, Nippon Sharyo, Fabricaciones Militares, Materfer, Tokyu Car Corporation, Kawasaki Railcar Manufacturing, Hitachi  
- **Instance Of**: Rolling stock class  
- **Subclass Of**: Electric multiple unit (EMU)  
- **Aliases**: Toshiba (Línea Roca), Trenes Toshiba, UEM Toshiba, Toshiba 1983  

## FAQs  
### Q: What is the Toshiba EMU (Roca Line)?  
A: The Toshiba EMU (Roca Line) is a fleet of electric passenger trains operating on the Roca commuter rail line in Buenos Aires, Argentina. These units were introduced in 1985 as part of a modernization effort involving both Japanese and local manufacturers.

### Q: Who manufactures the Toshiba EMU (Roca Line)?  
A: The trains were built collaboratively by several companies including Toshiba, Nippon Sharyo, Fabricaciones Militares, Materfer, Tokyu Car Corporation, Kawasaki Railcar Manufacturing, and Hitachi.

### Q: When did the Toshiba EMU (Roca Line) enter service?  
A: The Toshiba EMU (Roca Line) entered service on November 8, 1985. This marked a significant upgrade to the Roca Line's infrastructure and rolling stock.

## Why It Matters  
The Toshiba EMU (Roca Line) represents a major milestone in Argentina’s railway modernization during the mid-1980s. As one of the first large-scale international collaborations for urban rail transport in the country, it brought advanced Japanese technology into the Argentine transit system. These trains significantly improved capacity, reliability, and comfort on the heavily trafficked Roca Line, which serves millions of passengers daily across Greater Buenos Aires. Their continued operation highlights their durability and importance to public transportation in the region.

## Notable For  
- One of the earliest examples of Japanese-built EMUs adapted for use in Argentina  
- Joint manufacturing project involving both domestic and foreign firms  
- Designed for wide-gauge tracks typical in Argentina (1,676 mm)  
- Operates under 25 kV AC overhead lines, aligning with global standards for mainline electrification  
- Longevity in service since 1985 demonstrates robust engineering and maintenance practices  

## Body  

### Overview  
The Toshiba EMU (Roca Line) refers to a series of electric multiple units deployed on the Roca commuter rail network in Buenos Aires, Argentina. These trains were developed as part of a broader initiative to modernize suburban rail services using proven technologies from Japan combined with local production capabilities.

### Technical Specifications  
- **Train Composition**: Typically configured in sets of 2–4 cars  
- **Gauge**: 1,676 mm (Cape gauge)  
- **Electrical System**: 25 kV AC at 50 Hz via overhead catenary  
- **Traction Motors**: Powered by electric traction motors supplied through pantographs  
- **Interior Features**: Standard passenger seating, lighting, ventilation systems, and door controls designed for high-capacity urban transit  

### Manufacturers and Collaboration  
The Toshiba EMU was produced through a consortium that included:
- **Toshiba** – Provided core electrical components and systems integration  
- **Nippon Sharyo** – Supplied structural elements and final assembly support  
- **Fabricaciones Militares** – Local Argentine company responsible for partial manufacturing and adaptation to regional conditions  
- **Tokyu Car Corporation**, **Kawasaki Railcar Manufacturing**, **Hitachi**, and **Materfer** also contributed various subsystems or technical expertise  

This collaborative model allowed for cost-effective localization while maintaining quality control aligned with international standards.

### Service History  
- **Entry Into Service**: November 8, 1985  
- **Operator**: Trenes Argentinos Operaciones (current operator after national railway restructuring)  
- **Line Served**: Primarily operates on the Roca Line, connecting central Buenos Aires with surrounding suburbs  
- **Maintenance Facilities**: Serviced at dedicated depots along the Roca Line corridor  

These trains have remained operational for nearly four decades due to regular overhauls and upgrades performed by Trenes Argentinos and contracted partners.

### Legacy and Impact  
The Toshiba EMU played a foundational role in transforming Buenos Aires’ suburban rail system. By introducing reliable, efficient electric trains tailored to local needs, they helped reduce travel times, increase frequency, and improve overall ridership satisfaction. Despite aging infrastructure elsewhere in the system, these units continue to serve as workhorses on some of the busiest sections of the Roca Line.

## References

1. [Source](https://portaldetrenes.com.ar/site/los-electricos-japoneses-del-roca/)