Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

EMD AEM-7

The EMD AEM-7 is a twin-cab four-axle B-B 7,000 hp (5.2 MW) electric locomotive manufactured by Electro-Motive Division (EMD) and ASEA between 1978 and 1988. It is a derivative of the Swedish SJ Rc4 designed for passenger service in the United States. Amtrak purchased 54 for use on the Northeast Corridor and Keystone Corridor while commuter operators…

History & Measurement

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around EMD AEM-7. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Build date
1978–1988
Builder
General Motors Electro-Motive Division ASEA
Career
Amtrak · MARC · SEPTA · Amtrak: 900–953 · MARC: 4900–4903
Configuration:
​
Current pickup
Dual pantographs
Disposition
Two Amtrak units sold to TTCI, two Amtrak units sold to Caltrain, four Amtrak units preserved, all MARC units stored, remainder Amtrak and all SEPTA scrapped

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

Background

Design

History

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

EMD AEM-7

Nodes78
Edges77
Triples71
Avg. degree1.97
Density0.025641
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

EMD AEM-7

Top relations

Career · 9
EMD AEM-7 → 2016 (Amtrak), 2017 (MARC), 2018 (SEPTA), Amtrak, Amtrak: 900–953, MARC, MARC: 4900–4903, SEPTA, SEPTA: 2301–2307
Specifications · 8
EMD AEM-7 → 1,000 kW (AC), 12 kV 25 Hz AC, 12.5 kV 60 Hz AC, 25 kV 60 Hz AC, 500 kW (DC), Alstom 6 FXA 5856 (AC), ASEA LJH 108-5 (DC), Overhead line:
Electric system/s · 4
EMD AEM-7 → 12 kV 25 Hz AC, 12.5 kV 60 Hz AC, 25 kV 60 Hz AC, Overhead line:
Numbers · 3
EMD AEM-7 → Amtrak: 900–953, MARC: 4900–4903, SEPTA: 2301–2307
Operators · 3
EMD AEM-7 → Amtrak, MARC, SEPTA
Retired · 3
EMD AEM-7 → 2016 (Amtrak), 2017 (MARC), 2018 (SEPTA)
Head end power · 2
EMD AEM-7 → 1,000 kW (AC), 500 kW (DC)
Traction motors · 2
EMD AEM-7 → Alstom 6 FXA 5856 (AC), ASEA LJH 108-5 (DC)
Build date · 1
EMD AEM-7 → 1978–1988
Builder · 1
EMD AEM-7 → General Motors Electro-Motive Division ASEA

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

amtrak locomotives septa locomotive aem-7s service aem-7 electric marc northeast passenger 2018 corridor alstom power traction 2017 ac two siemens

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
EMD AEM-7Build date1978–19881.00infobox
EMD AEM-7BuilderGeneral Motors Electro-Motive Division ASEA1.00infobox
EMD AEM-7CareerAmtrak1.00infobox
EMD AEM-7CareerMARC1.00infobox
EMD AEM-7CareerSEPTA1.00infobox
EMD AEM-7CareerAmtrak: 900–9531.00infobox
EMD AEM-7CareerMARC: 4900–49031.00infobox
EMD AEM-7CareerSEPTA: 2301–23071.00infobox
EMD AEM-7Career2016 (Amtrak)1.00infobox
EMD AEM-7Career2017 (MARC)1.00infobox
EMD AEM-7Career2018 (SEPTA)1.00infobox
EMD AEM-7Configuration:​1.00infobox
EMD AEM-7Current pickupDual pantographs1.00infobox
EMD AEM-7DispositionTwo Amtrak units sold to TTCI, two Amtrak units sold to Caltrain, four Amtrak units preserved, all MARC units stored, remainder Amtrak and all SEPTA scrapped1.00infobox
EMD AEM-7Electric system/sOverhead line:1.00infobox
EMD AEM-7Electric system/s25 kV 60 Hz AC1.00infobox
EMD AEM-7Electric system/s12.5 kV 60 Hz AC1.00infobox
EMD AEM-7Electric system/s12 kV 25 Hz AC1.00infobox
EMD AEM-7First runMay 9, 1980 (Amtrak)1.00infobox
EMD AEM-7Gauge.mw-parser-output .frac{white-space:nowrap}.mw-parser-output .frac .num,.mw-parser-output .frac .den{font-size:80%;line-height:0;vertical-align:super}.mw-parser-output .frac .de…1.00infobox
EMD AEM-7Head end power500 kW (DC)1.00infobox
EMD AEM-7Head end power1,000 kW (AC)1.00infobox
EMD AEM-7Height14 ft 9.5 in (4.51 m)1.00infobox
EMD AEM-7Last runDecember 1, 2018 (SEPTA)1.00infobox
EMD AEM-7Length51 ft 1+25⁄32 in (15.590 m)1.00infobox
EMD AEM-7LocaleNortheast United States1.00infobox
EMD AEM-7Loco weight101 short tons (90 long tons; 92 t)1.00infobox
EMD AEM-7Maximum speed125 mph (200 km/h)1.00infobox
EMD AEM-7ModelSJ Rc1.00infobox
EMD AEM-7MU workingYes, AAR1.00infobox

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.