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| NS DDZ | |
|---|---|
.jpg) NS DDZ 7618 in 6-car formation near Zwolle | |
 Refurbished second class interior | |
| Manufacturer | Waggonfabrik Talbot, De Dietrich Ferroviaire, and Adtranz |
| Constructed | 1992–1994; 1997–1998 |
| Refurbished | 2009–present |
| Number built | 50 (mDDM) 79 (Bvs) 103 (Bv) 76 (ABv) |
| Formation | Multiple unit: Bvs + ABv + Bv + mDDM (4-car, 448 passengers) ABvs + Bv + ABv + mBs (4-car) ABvs + Bv + ABv + Bv + ABv + mBs (6-car) Push-pull train: Bvs + ABv + Bv + Bv + 1700 (588 passengers) |
| Fleet numbers | 270 7001 – 270 7079 (Bvs); 280 7201 – 280 7302; 280 – 7508 (Bv); 380 7501 – 380 7507; 380 7509 – 380 7977 (ABv) 390 7701 – 390 7750 (mDDM) |
| Capacity | 120 seated (Bvs) 140 seated (Bv) 124 seated (9ABv) 44 seated (mDDM) |
| Operators | Nederlandse Spoorwegen |
| Specifications | |
| Car length | 26,890 mm (88 ft 2+5⁄8 in), Bvs 26,400 mm (86 ft 7+3⁄8 in), Bv and ABv 21,390 mm (70 ft 2+1⁄8 in), mDDM |
| Maximum speed | 140 km/h (87 mph) (service) 160 km/h (99 mph) (design) |
| Weight | 76 t (75 long tons; 84 short tons) (mDDM) 46 t (45.3 long tons; 50.7 short tons) (Bv, ABv) 53 t (52 long tons; 58 short tons) (Bvs) |
| Traction system | ADtranz GTO-VVVF |
| Traction motors | 6× ADtranz 6 FBA 4548A |
| Power output | 2,400 kW (3,200 hp) |
| Gear ratio | 1 : 4.294 |
| Electric system(s) | 1.5 kV DC Catenary (mDDM) |
| Current collector(s) | Pantograph |
| UIC classification | Bo'-Bo'-Bo' (mDDM) 2′2′ (ABv, Bv, Bvs) |
| Coupling system | BSI coupling |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
NS DDZ (Full name: DubbelDekkerZonering) were built by Waggonfabrik Talbot (momentarily a part of Bombardier), De Dietrich Ferroviaire (now Alstom DDF) and Adtranz between 1992 and 1998 and are operated in the Netherlands by Nederlandse Spoorwegen (NS). This class is a type of a power concentrated electric multiple unit and was delivered in two batches as DDM-2 and DDM-3. A trailer cars of this multiple unit can also be operated with a Class 1700 electric locomotive instead of a motor car, forming a push-pull train.
The trains were formerly known as NS DD-AR (full name: Dubbeldeksaggloregiomaterieel) From 2009 the NS DD-AR were modernised to transform them from Sprinter to Intercity.