Siemens & Innomotics SIMOTICS XP 1MB5 Explosion-Proof Motors
Brand: Siemens / Innomotics | Series: SIMOTICS XP (1MB55, 1MB58 Heavy-Duty Flameproof Range)
Heavy-Duty Hazardous Area Lineage — Siemens to Innomotics:
The SIMOTICS XP 1MB5 platform represents Siemens' flagship heavy-frame explosion-proof low-voltage motor line engineered specifically for large-capacity installations in hazardous gas and dust environments. Following Siemens' corporate carve-out, the entire 1MB5 hazardous area motor family is now engineered, certified, and manufactured under the independent brand identity Innomotics.
Engineering Protection & Global Safety Certification:
• Maximum Safety in Extreme Zones: Fully certified under international directives including ATEX, IECEx, and China Ex (CCC-Ex) for Zone 1 (Ex db / Ex db eb), Zone 2 (Ex ec), Zone 21 (Ex tb), and Zone 22 (Ex tc).
• High Power Output Across Large Frames: Built on heavy-duty grey cast iron frames (IEC sizes 315, 355, 400, and 450) covering rated capacities from 200 kW up to 1,000 kW and beyond, filling the critical high-power niche in petrochemical refineries, gas transport pipelines, offshore drilling platforms, and underground mining operations.
• Direct Retrofit for Legacy Flameproof Lines: Serves as the modern, high-efficiency (IE3 / IE4) direct replacement for legacy Siemens 1MA8, 1MJ8, and heavy 1LG6 explosion-proof motors, preserving mounting footprints while drastically reducing thermal stress and operational energy costs.
The SIMOTICS XP 1MB5 platform represents Siemens' flagship heavy-frame explosion-proof low-voltage motor line engineered specifically for large-capacity installations in hazardous gas and dust environments. Following Siemens' corporate carve-out, the entire 1MB5 hazardous area motor family is now engineered, certified, and manufactured under the independent brand identity Innomotics.
Engineering Protection & Global Safety Certification:
• Maximum Safety in Extreme Zones: Fully certified under international directives including ATEX, IECEx, and China Ex (CCC-Ex) for Zone 1 (Ex db / Ex db eb), Zone 2 (Ex ec), Zone 21 (Ex tb), and Zone 22 (Ex tc).
• High Power Output Across Large Frames: Built on heavy-duty grey cast iron frames (IEC sizes 315, 355, 400, and 450) covering rated capacities from 200 kW up to 1,000 kW and beyond, filling the critical high-power niche in petrochemical refineries, gas transport pipelines, offshore drilling platforms, and underground mining operations.
• Direct Retrofit for Legacy Flameproof Lines: Serves as the modern, high-efficiency (IE3 / IE4) direct replacement for legacy Siemens 1MA8, 1MJ8, and heavy 1LG6 explosion-proof motors, preserving mounting footprints while drastically reducing thermal stress and operational energy costs.
The Siemens & Innomotics SIMOTICS XP 1MB5 Series is built to provide infallible safety, superior explosion containment, and continuous duty in explosive atmospheres classified under Temperature Classes T1 to T4 and Gas Groups IIA, IIB, and IIC. Designed for direct online (DOL) operation and variable frequency drive (VFD) converter duty up to 690V, 1MB5 motors incorporate reinforced DURIGNIT IR 2000 Class F insulation with Class B temperature rise (80K reserve), flameproof cast-iron terminal boxes, certified pressure-resistant enclosures, standard Pt100 RTDs in stator windings and bearing housings, and IP65/IP66 ingress protection. They are specified worldwide for heavy refinery crude pumps, offshore gas compressors, hydrogen transfer blowers, and large industrial mixers.
Technical Specifications
| Model / Part Number | 1MB5503-3AB43-4AA4 (250 kW, 4-Pole, Frame 315L, IE3 Cast Iron Flameproof Ex db) |
|---|---|
| Brand Lineage | Siemens → Innomotics (100% Authentic European Hazardous Area Supply) |
| Series Designation | SIMOTICS XP 1MB55 (IE3 Premium) | SIMOTICS XP 1MB58 (IE4 Super Premium) |
| Explosion Protection Types | Flameproof Enclosure Ex db / Ex db eb | Increased Safety Ex ec | Dust Ignition Proof Ex tb / Ex tc |
| Hazardous Area Classification | Gas Zones: Zone 1, Zone 2 (Gas Groups IIA, IIB, IIC; T1 - T4) | Dust Zones: Zone 21, Zone 22 (Dust Groups IIIA, IIIB, IIIC) |
| Rated Power Range | 200 kW to 1,000 kW+ (IEC Frame Sizes 315M, 315L, 355, 400, 450) |
| Pole Configurations | 2-Pole (3000 rpm), 4-Pole (1500 rpm), 6-Pole (1000 rpm), 8-Pole (750 rpm) |
| Mounting Executions | IM B3 (Foot), IM B35 (Foot & Flange), IM V1 (Vertical Shaft Down) |
Siemens & Innomotics 1MB5 Heavy Duty Ex Motor Selection Table (4-Pole, 400V/690V)
Procurement selection directory for Siemens & Innomotics SIMOTICS XP 1MB5 Explosion-Proof Motors. Review primary ratings for heavy hazardous area 4-Pole (1500 rpm at 50Hz, 400V/690V) applications. Identify exact IEC frame sizes (315 to 450), rated power in kW, certified explosion protection ratings, and official manufacturer order codes:
| Brand Lineage | Series | Protection Class | Frame Size | Rated Power | Poles | Order Number / Model Code |
|---|---|---|---|---|---|---|
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 315M | 132 kW | 4 | 1MB5503-3AB2□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 315L | 160 kW | 4 | 1MB5503-3AB4□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 315L | 200 kW | 4 | 1MB5503-3AB5□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 315L | 250 kW | 4 | 1MB5503-3AB6□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 355M | 280 kW | 4 | 1MB5503-3BB2□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 355L | 315 kW | 4 | 1MB5503-3BB5□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 355L | 355 kW | 4 | 1MB5503-3BB6□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 400M | 400 kW | 4 | 1MB5503-4AB0□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 400L | 500 kW | 4 | 1MB5503-4AB3□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 400L | 560 kW | 4 | 1MB5503-4AB5□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 450M | 630 kW | 4 | 1MB5503-4BB0□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 450L | 710 kW | 4 | 1MB5503-4BB3□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 450L | 800 kW | 4 | 1MB5503-4BB5□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB55 | Ex db / Ex eb (Zone 1) | 450L | 1000 kW | 4 | 1MB5503-4BB7□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB58 | Ex ec (Zone 2) / IE4 | 315L | 200 kW | 4 | 1MB5803-3AB5□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB58 | Ex ec (Zone 2) / IE4 | 315L | 250 kW | 4 | 1MB5803-3AB6□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB58 | Ex ec (Zone 2) / IE4 | 355L | 315 kW | 4 | 1MB5803-3BB5□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB58 | Ex ec (Zone 2) / IE4 | 400L | 500 kW | 4 | 1MB5803-4AB3□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB58 | Ex ec (Zone 2) / IE4 | 450L | 800 kW | 4 | 1MB5803-4BB5□-□□□□ |
| Siemens / Innomotics | SIMOTICS XP 1MB58 | Ex ec (Zone 2) / IE4 | 450L | 1000 kW | 4 | 1MB5803-4BB7□-□□□□ |
Documentation & Technical Catalogs
SIMOTICS XP 1MB5 Explosion Protection Architecture
Engineering comparison between the primary protection modes available across the 1MB5 heavy platform:
| Explosion Protection Mode | Designation Code | Applicable Hazardous Zones | Target Operating Environment |
|---|---|---|---|
| Flameproof Enclosure | Ex db / Ex db eb | Zone 1 & Zone 2 (Gas Groups IIA, IIB, IIC) | Main refinery crude pumps, chemical reactor drives, offshore gas compressors where flammable gases are likely to occur in normal operation. |
| Increased Safety (Non-Sparking) | Ex ec | Zone 2 (Gas Groups IIA, IIB, IIC) | Secondary process areas, industrial fan drives, and pipeline pumping stations where explosive atmospheres occur only abnormally and briefly. |
| Dust Ignition Protection | Ex tb / Ex tc | Zone 21 & Zone 22 (Dust Groups IIIA, IIIB, IIIC) | Grain terminals, coal-handling conveyor plants, pharmaceutical bulk material handling, and pulverizing mills with combustible dust atmospheres. |
Legacy Siemens 1MA8 / 1MJ8 to SIMOTICS XP 1MB5 Direct Retrofit Guide
Discontinued large frame Siemens flameproof motors (1MA8, 1MJ8, 1LG6 Ex) can be replaced directly by modern Innomotics 1MB5 units. Review the 1-to-1 mechanical fitment and safety enhancements:
| Legacy Siemens Ex Model | Obsolescence / Certificate Risk | Direct Modern 1MB5 Replacement | Protection Rating | Mechanical Fit & Retrofit Engineering Notes |
|---|---|---|---|---|
| Siemens 1MJ8 315 / 355 Frame | Expired local flameproof certificates; high energy loss | SIMOTICS XP 1MB5503 Flameproof 100% Drop-In | Ex db / Ex db eb (IE3) | Exact match for shaft extension diameter, centerline height, and B3 foot mounting bolt centers. |
| Siemens 1MA8 Increased Safety | Limited thermal protection under modern variable speed drives | SIMOTICS XP 1MB5503 / 1MB5803 VFD Certified | Ex ec / Ex eb (IE3/IE4) | Certified for inverter duty (VFD) with reinforced insulation and certified thermal monitoring sensors. |
| Siemens 1LA8 / 1LG6 with Ex-Kit | Non-standard modular retrofits lacking updated ATEX/IECEx files | SIMOTICS XP 1MB5 Factory Certified Global Certified | Zone 1 / 2 / 21 / 22 | Full factory documentation, original flameproof test certificates, and global customs acceptance. |
Hazardous Area Technical Selection & Project Sourcing by WeDrive
WE DRIVE HONGKONG LIMITED provides technical sourcing, safety certificate verification, and global supply for the complete Siemens & Innomotics SIMOTICS XP 1MB5 Heavy Explosion-Proof Motor platform. Whether your project requires foot-mounted flameproof pumps (1MB5503 B3), vertical flange-mounted mixer drives (1MB5503 V1), extreme low-temperature executions down to -50°C, or specialized stainless-steel terminal boxes with auxiliary sensor entries, our technical team verifies all engineering parameters against plant zone classifications.
Upgrading legacy 1MJ8 or 1MA8 series flameproof motors to 1MB5 units ensures 100% mechanical interchangeability on existing foundations, lower internal temperature rises, and full compliance with updated ATEX 2014/34/EU and IECEx safety standards without costly plinth alterations. Submit your current motor nameplate photograph or 16-digit order code (e.g., 1MB5503-3AB43-4AA4-Z), and our technical sales engineers will deliver an authentic OEM quotation with complete certification documents.
Upgrading legacy 1MJ8 or 1MA8 series flameproof motors to 1MB5 units ensures 100% mechanical interchangeability on existing foundations, lower internal temperature rises, and full compliance with updated ATEX 2014/34/EU and IECEx safety standards without costly plinth alterations. Submit your current motor nameplate photograph or 16-digit order code (e.g., 1MB5503-3AB43-4AA4-Z), and our technical sales engineers will deliver an authentic OEM quotation with complete certification documents.
Core Benchmark Model Standard Configurations
- 1MB5503-3AB0 (110 kW Zone 1 Ex db)
- 1MB5503-3AB2 (132 kW Zone 1 Ex db)
- 1MB5503-3AB4 (160 kW Zone 1 Ex db)
- 1MB5503-3AB5 (200 kW Zone 1 Ex db)
- 1MB5503-3AB6 (250 kW Zone 1 Ex db)
- 1MB5503-3BB2 (280 kW Zone 1 Ex db)
- 1MB5503-3BB5 (315 kW Zone 1 Ex db)
- 1MB5503-3BB6 (355 kW Zone 1 Ex db)
- 1MB5503-4AB0 (400 kW Zone 1 Ex db)
- 1MB5503-4AB3 (500 kW Zone 1 Ex db)
- 1MB5503-4AB5 (560 kW Zone 1 Ex db)
- 1MB5503-4BB0 (630 kW Zone 1 Ex db)
- 1MB5503-4BB3 (710 kW Zone 1 Ex db)
- 1MB5503-4BB5 (800 kW Zone 1 Ex db)
- 1MB5503-4BB7 (1000 kW Zone 1 Ex db)
- 1MB5803-3AB5 (200 kW Zone 2 Ex ec)
- 1MB5803-3BB5 (315 kW Zone 2 Ex ec)
- 1MB5803-4AB3 (500 kW Zone 2 Ex ec)
- 1MB5 B3 Foot Mounted Flameproof
- 1MB5 V1 Vertical Shaft Down Motor
