ABB 5SDF1045H0002 3BHL000986P3002 Press-Pack Freewheeling Diode Module
Purchase Attributes：Original, Brand New
Service Attributes
▷ Stock & Logistics：Fast Delivery
▷ After-sales Guarantee：12 Months Warranty
Compatible System: GE EX2100 Generator Static Excitation Cabinet,
Core Function: IGCT reverse current absorption
Total Assembly Weight: ~2.3 kg
ABB 5SDF1045H0002 + 3BHL000986P3002 Press-Pack Freewheeling Diode Module For GE EX2100 Excitation & MV Converters
Manufacturer: ABB Hitachi Energy Semiconductors
Dual Part Number: Diode Chip:5SDF1045H0002 / Mount Assembly Frame:3BHL000986P3002
Matching Power Device: 5SHY3545L0010 IGCT + 3BHB013088R0001 GDU Gate Driver
Compatible System: GE EX2100 Generator Static Excitation Cabinet, ABB ACS6000 Medium Voltage Drives
Type: 4500V Press-Pack Fast Soft Recovery Freewheeling Diode Complete Stack Assembly
Core Function: IGCT reverse current absorption, rectifier bridge power conversion, overvoltage suppression, unit stack modular assembly
1. Product Overview
5SDF1045H0002 is ABB 4500V StakPak press-pack fast soft recovery freewheeling diode, matched with dedicated assembly frame 3BHL000986P3002 as a complete power stack unit. It is always paired with 5SHY3545L0010 snubberless IGCT to form a full power bridge arm for medium voltage power converters.
The press-pack ceramic sealed design eliminates internal solder layers, delivering superior thermal cycling reliability; the device fails in short-circuit mode to avoid generator loss-of-field runaway risks in power plant excitation systems. Soft recovery characteristic drastically reduces switching reverse recovery losses, lowering cabinet heat generation under continuous 24/7 heavy load operation.
Mainly deployed in GE EX2100 static excitation converters for gas/steam turbine generators, also used in ABB ACS6000 medium voltage variable frequency drives. Water cooling design supports 1000A continuous rated current operation. ABB stopped original new production, refurbished and surplus modules are mainstream spare parts for power plant retrofit maintenance.
2. Full Electrical Specifications
• Device Type: Fast Soft Recovery Freewheeling Press-Pack Diode
• Repetitive Reverse Voltage VRRM: 4500 V
• Average Forward Current IFAV @85℃: 1000 A
• Non-repetitive Surge Current IFSM (10ms): 28 kA
• Forward Voltage Drop VF @1000A,25℃: ~1.85 V
• Recovery Characteristic: Low Qrr soft recovery, optimized for 0~2kHz switching frequency
• Cooling Method: Forced water cooling base plate (integrated in 3BHL000986P3002 frame)
• Operating Junction Temperature Tj: -40℃ ~ +125℃
• Packaging: Hermetic ceramic StakPak press-pack, short-circuit fail-safe mode
• Total Assembly Weight: ~2.3 kg
• Certifications: IEC 62477, UL power generation industrial power semiconductor standard
3. On-stack Hardware Layout
1. Core power diode chip: 5SDF1045H0002 circular StakPak press-pack silicon wafer
2. Complete mounting assembly: 3BHL000986P3002 (water cooling base, copper bus bar terminals, insulation support fixture, compression clamp)
3. High-current laminated copper busbar for DC bridge circuit connection
4. Standard positioning structure for parallel stacking with IGCT power stacks
5. Sealed ceramic housing for long-term high voltage insulation and moisture resistance
4. System Matching Hardware Chain (EX2100 Generator Excitation)
• IS215UCVEH2AF / DS200SDCCG5AHD: Turbine & Excitation Main Control CPU
• Fiber optic cable: Transmit PWM excitation gating pulses to IGCT GDU board
• 3BHB013088R0001 GDU Gate Drive Unit: IGCT pulse amplification & fault detection
• 5SHY3545L0010 IGCT main power switching device
• 5SDF1045H0002 + 3BHL000986P3002 freewheeling diode stack: reverse current absorption & rectifier arm
• Generator rotor excitation winding: converter DC output load
• Full signal chain: Main CPU PWM command → Fiber → GDU → IGCT switch; inductive reverse current diverted through 5SDF1045H0002 diode to suppress overvoltage, realize rectifier/inverter four-quadrant excitation regulation
• Platform Separation: Exclusive ABB medium voltage power semiconductor stack, incompatible with GE low voltage I/O boards, Siemens SPPA-T3000, Honeywell Ovation DCS hardware
5. Typical Industrial Application Scenarios
• Combined-cycle gas/steam turbine GE EX2100 excitation cabinet: Freewheeling & rectifier diode for four-quadrant generator AVR voltage & reactive power control
• Coal-fired large generator excitation system: Suppress rotor inductive overvoltage during unit trip de-excitation, protect IGCT power switches
• ABB ACS6000 medium voltage mine & steel mill drives: Rectifier bridge arm diode for motor four-quadrant speed regulation
• Wind farm grid-connected VSC converter: Bidirectional energy conversion freewheeling protection for high-power power stacks
ABB Hitachi Energy © 5SDF1045H0002 + 3BHL000986P3002 Press-Pack Freewheeling Diode Stack For Power Plant Excitation & Medium Voltage Drives
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