siemens
Siemens SENTRON 3NH HRC Fuse
Model: 3NH3030
4-hour response · Pricing in SAR · Delivery across all KSA regions
3NH3030 — Siemens SENTRON 3NH HRC Fuse
The Siemens SENTRON 3NH HRC (High Rupturing Capacity) NH-type fuse link is the industrial standard for blade-contact short-circuit protection in LV distribution boards, motor control centres, and transformer secondary protection across Saudi Arabia. The 3NH ceramic-body fuse provides breaking capacities up to 120 kA at 500 V AC in the gG (general purpose) characteristic that protects cables against both overload and short-circuit. Covering 2 A to 1250 A in six NH sizes (000, 00, 0, 1, 2, 3), the 3NH addresses all LV distribution protection requirements from branch circuit through to main incomer fusing in large industrial switchboards.
The 3NH ceramic arc quenching body with quartz sand fill absorbs arc energy when the element melts, containing the arc within the cartridge and safely achieving the 120 kA breaking capacity rating. The integral striker mechanism provides a visual blown-fuse indicator — a spring-loaded plunger that protrudes from the end cap when the element melts — allowing identification by visual inspection without probing live circuits. Striker contact outputs on fuse holders can activate blown-fuse alarm relays for unmanned distribution rooms.
In Saudi Arabia, 3NH HRC fuses are the standard short-circuit protection device in industrial fuse switchboards, LV switchgear fuse drawers, and motor feeder fuse panels at ARAMCO, SABIC, NWC, and SEC facilities. They are specified in Siemens SIVACON S8 switchgear fuse compartments and SENTRON fuse combination switches (3KL, 3KX series). Panel builders across Saudi Arabia stock 3NH in common ratings for fast-turnaround MCC and switchboard assembly.
Razz Middle East maintains comprehensive 3NH HRC fuse stock in all sizes and current ratings for immediate delivery throughout Saudi Arabia.
Technical Specifications
Full specifications for the 3NH3030
- Current Range
- 2–1250 A
- Voltage
- 500 V AC
- Characteristics
- gG, gM, gR (semiconductor)
- Sizes
- NH000, NH00, NH0, NH1, NH2, NH3
- Breaking Capacity
- 120 kA at 500 V AC
- Body
- Ceramic with quartz sand fill
- Indicator
- Integral striker mechanism
- Standard
- IEC 60269-1 and -2
Key Features & Benefits
- Ceramic body with quartz sand arc-quench fill achieves 120 kA breaking capacity, safely containing arc energy during short-circuit without external arc flash risk.
- Integral striker mechanism provides visible blown-fuse indication — the plunger protrudes from the end cap when the element melts — enabling identification without probing live circuits.
- Three current-time characteristics — gG general purpose, gM motor protection, gR semiconductor — cover standard LV protection application requirements from a single product family.
- Six NH sizes (000 to 3) from 2 A to 1250 A with standardised blade contact dimensions per DIN 43620 ensure interchangeability between fuse holders from different manufacturers.
- Striker contact output enables external blown-fuse alarm relay activation, providing automatic fault notification in unmanned industrial distribution rooms.
- Temperature coefficient compensation maintains tripping accuracy across the full ambient temperature range in Saudi Arabia's hot outdoor distribution rooms.
- 120 kA breaking capacity covers the highest prospective fault currents in LV systems close to large distribution transformers in Saudi petrochemical and utility power networks.
Industrial Applications in Saudi Arabia
- Industrial fuse switchboard protection at ARAMCO and SABIC LV distribution boards, where 3NH gG fuses provide main upstream short-circuit protection for downstream MCCBs and contactors.
- SIVACON S8 LV switchgear fuse drawer protection for feeder and motor circuits at large industrial switchboards in Jubail and Yanbu.
- Transformer secondary protection at site distribution transformers in MODON industrial estates, where 3NH fuses provide fast, energy-limiting fault clearance protecting transformer windings.
- Motor circuit protection in existing LV fuse-board-based motor control systems, where 3NH gM fuses accommodate the motor starting characteristic while protecting against locked-rotor conditions.
- Semiconductor protection for VFD input fusing, where 3NH gR fast-acting fuses provide the low I²t energy-limiting characteristic required to protect power semiconductor devices.
- Main incomer fusing for temporary power supplies at Vision 2030 construction projects, where NH3 and NH2 high-current fuses protect portable LV distribution equipment.
- Panel builder stock for MCC and switchboard assembly throughout the Kingdom, where 3NH fuses are standard components in fuse drawer and fuse switch assembly kits.
Industrial Supplier in Saudi Arabia
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Frequently Asked Questions — 3NH3030
Common questions from buyers in Saudi Arabia and the GCC