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{{Infobox automobile
| name = Proterra Catalyst
| image = [[File:0016Proterra B39electric bus leaving Eastgate P&R (22998410693).jpg|250px]]<br/>[[File:DARTDLinkSAN Airport Inter-Terminal Shuttle Proterra Catalyst BE35 SAN Terminal 2 (52226306222).jpg|250px]]
| caption = Top: A Catalyst BE40 operated by [[MTAKing RegionalCounty Bus OperationsMetro]]<br/>Bottom: A Catalyst BE35 operated by [[DallasSan AreaDiego RapidInternational TransitAirport]]
| manufacturer = [[Proterra (bus manufacturer)|Proterra]]
| aka =
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| motor = {{Unbulleted list|[[UQM Technologies]] PP220 (original)<ref name=Altoona-BE40/>|[[UQM Technologies]] SPM250-130-2 (ProDrive)<ref name=Altoona-PD>{{cite report |url=http://apps.altoonabustest.psu.edu/buses/502 |title=Federal Transit Bus Test, Proterra CAT35PD |publisher=Bus Testing and Research Center |date=January 2019}}</ref>|2×[[Parker Hannifin]] GVM310-125 (DuoPower)<ref name=Altoona-DP>{{cite report |url=http://apps.altoonabustest.psu.edu/buses/519 |title=Federal Transit Bus Test, Proterra CAT40DP |publisher=Bus Testing and Research Center |date=September 2020}}</ref>}}
}}
The '''Proterra Catalyst''' is a [[batteryBattery electric bus|battery-electric]] [[Low-floor bus|low-floor]] [[transit bus]] that was built by [[Proterra (bus manufacturer)|Proterra]] from 2014 to 2020. The second generation of Proterra's battery-electric buses, it succeeded the earlier [[Proterra EcoRide|EcoRide]] as the company's flagship product.
 
== History ==
{{Unreferenced section|date=July 2024}}
In 2014 Proterra introduced the Catalyst, a fast-charge 100% electric bus to replace the EcoRide BE35. The bus was built on the EcoRide's design and engineering and delivered a longer, lighter and more fuel-efficient bus. The second-generation bus measures either {{convert|42|ft|abbr=on||1}} or {{convert|36|feet|abbr=on||1}} and weighs approximately {{convert|27000|lb|kg|abbr=on}}. The bus is built from lightweight, durable carbon composite. The overall lower weight helps reduce wear and tear on streets. It has no tailpipe and runs virtually silent.
 
== Specifications ==
With the on-route fast charging system, the Catalyst can be operated continuously, 24/7, without the need to head to the depot for lengthy charge times. Catalyst buses equipped with the Fast Charge (FC) battery pack can charge at a rate of up to 500&nbsp;kW.<ref name=Catalyst-intro>{{cite web |url=http://louisianacleanfuels.org/images/meeting/041416/LAF_Presentations/proterra.pdf |title=Proterra Catalyst Platform Introduction |date=April 14, 2016 |publisher=Louisiana Alternative Fuels Conference & Expo |accessdate=July 13, 2018}}</ref> The company added a {{convert|35|ft|4=1|abbr=on}} model of the Catalyst to its product line in October 2015.
 
Catalyst is a modular system, offered with two different lengths, two different drivetrains, and seven different batteries, depending on the required passenger capacity, speed (hill performance),<ref>{{cite web |url=https://www.proterra.com/wp-content/uploads/2017/10/DT_PERF_HC-1.pdf |title=Proterra 40 Foot Bus drivetrain performance |author= |date= |publisher=Proterra |accessdate=July 12, 2018}}</ref> and range, respectively.<ref name=ProterraSpecs>{{cite web |url=https://www.proterra.com/products/35-foot-catalyst/ |title=The Proterra Catalyst 35-foot transit vehicle |author= |date= |publisher=Proterra |accessdate=July 12, 2018}}</ref>
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== Replacement ==
{{Unreferenced section|date=July 2024}}{{Main|Proterra ZX5}}
On September 15, 2020, Proterra announced the replacement to the Catalyst, the ZX5. The ZX5 40' replaced the BE40 and the ZX5 35' replaced the BE35. [[Edmonton Transit Service]] was the launch customer, ordering 40 ZX5 40' buses.
 
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File:KCM 4602 (Proterra) charging at Eastgate P&R (25452679844).jpg|Catalyst instrument panel
File:King County Metro Proterra Catalyst (25075359016).jpg|Additional driver's controls
File:Proterra 20 MTA.jpg|Front interior of Proterra Catalyst (MTA NYCT Spec)
File:Proterra 20 MTA rear.jpg|Rear interior of Proterra Catalyst (MTA NYCT Spec)
File:Proterra_852_PANYNJ.jpg|[[Port Authority of New York and New Jersey]] Proterra Catalyst
</gallery>