| Year | February 1938 |
| Vehicle Type | Heavy Self-Propelled Infantry Gun |
| Origin & Designer | Germany/Alkett |
| Numbers Produced | 38 |
| Crew | 4 (Commander, Gunner, Loader & Driver) |
| Main Armament | 1 x 150mm L/11 sIG 33 Infantry Gun |
| Main Armament | [@sponson_traverse] |
| Elevation | -4° to +75° |
| Turret Traverse | [@turret_traverse] |
| Gun Traverse | 25° |
| Gun Mount | [@gun_mounts] |
| Maximum Range | [@maximum_range] |
| Armour Penetration | [@armour_penetration] |
| Gun Sight | Rblf36 |
| Secondary Armament | [@secondary_armament] |
| Smoke Discharger | [@smoke_discharger] |
| Ammunition Carried | 25 x 150mm |
| Height | 3.35m |
| Width | 2.06m |
| Length | 4.67m |
| Combat Weight | 8.500 kg |
| Ground Clearance | 0.29m |
| Fording Depth | 0.58m |
| Trench Crossing | 1.40m |
| Obstacle Clearance | 0.36m |
| Climbing Ability | 30° |
| Radio | FuG Spr. F |
| Armour | Hull Front: 13mm Hull Sides: 13mm Hull Rear: 13mm Hull Top: 6mm Hull Bottom: 6mm Gun Compartment: Gun Mantle: None Front: 10mm Sides: 10mm Rear: Open Top: Open |
| Engine | Maybach NL 38 TR (Petrol) |
| Transmission | 5 Forward & 1 Reverse |
| Maximum Road Range | 140 km |
| Maximum Cross Country Range | 115 km |
| Maximum Water Range | [@maximum_water_range] |
| Maximum Road Speed | 34 kph |
| Maximum Cross Country Speed | 13 kph |
| Maximum Water Speed | [@maximum_water_speed] |
| Variants | [@variants] |
| Notes | The sIG33 Ausf B was Germany’s first attempt to mount the sIG33 infantry gun on an AFV carriage. The sIG33 infantry gun was notoriously heavy and this conversion was to provide mobile infantry with a gun what could keep up with the forward elements. The platform was a Panzer I Ausf B with the turret and upper half of the superstructure were removed and an armoured box was provided to shield the gun crew from small arms fire. The howitzer was fitted wheels and all to the vehicle. Because of the small size of the armoured box, no provision was made to carry ammunition and the weight caused many breakdowns. Never the less the vehicle saw action during the Blitzkrieg attacks through France, Belgium and Holland and later in the Balkan and Russia. |