HUM18-63 Miniature Circuit Breaker 63A 1P-4P
The HUM18-63 series is a miniature circuit breaker for AC 50/60Hz systems up to 230/400V, rated 1A–63A. Overload and short-circuit protection with Icu 10kA / Ics 7.5kA breaking capacity. Certified IEC 60898-1, CB, CE, CCC, RoHS. Pole options: 1P, 1P+N, 2P, 3P, 3P+N, 4P. Trip curves: B, C, D. 10,000-cycle electrical life. Top or bottom wiring, TH35-7.5 DIN rail mount.
Standard: IEC 60898-1
Certifications: CB, CE, CCC, RoHS
Rated Current: 1A – 63A
Breaking Capacity: Icu 10kA / Ics 7.5kA
Pole Configurations: 1P, 1P+N, 2P, 3P, 3P+N, 4P
Trip Curves: B, C, D
Mounting: TH35-7.5 DIN Rail
Product Information
HUM18-63 Miniature Circuit Breaker – MCB with 63 Amperes of Distribution Protection
The HUM18-63 series from HUYU Electric provides advanced overcurrent protection for AC 50/60Hz setups, rated at 230/400V with Icu 10kA / Ics 7.5kA. Covering currents from 1A to 63A, this miniature circuit breaker is ideal for residential, commercial, and light industrial applications. Fully compliant with IEC 60898-1 standards, it is certified for CB, CE, CCC, and RoHS requirements worldwide. Featuring six pole configurations (1P, 1P+N, 2P, 3P, 3P+N, 4P) and trip curves in types B, C, and D, it adapts to diverse distribution board layouts. With guaranteed durability: 10,000 electrical and 20,000 mechanical cycles, optional top or bottom wiring, and TH35-7.5 DIN rail compatibility, it delivers reliable long-term operation.
HUYU Electric, a factory-direct manufacturer with over 36 years of engineering expertise, offers competitive OEM/ODM pricing, custom laser branding, and comprehensive compliance documentation. This series serves as a reliable MCB manufacturer alternative suitable for wholesale markets and partnership projects with leading global brands like Schneider, ABB, Hager, Eaton, Siemens, Legrand, Chint, and Havells.
Configurations & MCB Types — B, C, D Curves from 1P to 4P
| Pole | Current Range | Curves | Typical Use |
|---|---|---|---|
| 1P | 1A – 63A | B, C, D | Single-phase lighting & socket circuits |
| 1P+N | 1A – 63A | B, C, D | Single-phase with neutral switching |
| 2P | 1A – 63A | B, C, D | Double pole isolation, 400V single-phase |
| 3P | 1A – 63A | B, C, D | Three-phase motor & distribution |
| 3P+N | 1A – 63A | B, C, D | Three-phase with neutral disconnect |
| 4P | 1A – 63A | B, C, D | Four-pole full isolation |
All HUM18‑63 circuit breakers share the same 10,000A Icu / 7,500A Ics mechanism. Type B protects resistive loads (lighting, heating). Type C protects inductive loads (motors, HVAC). Type D handles high-inrush equipment (transformers, x-ray machines). The series covers every critical MCB type from single pole to 4 pole, available in 1P, 2P, 3P, 4P and anything in between — no need to mix brands.
Why a 63 Amp MCB with 10kA Breaking Capacity Matters
The 63 amp MCB range is designed for peak safety performance. With 10kA Icu / 7.5kA Ics under IEC 60898-1 standards, it is ideal for locations with high fault currents, such as industrial sub-distribution boards and main supply areas. Further reliability is ensured by its 500V insulation and 4kV impulse withstand. Tested to last through 10,000 electrical and 20,000 mechanical cycles, it’s perfect for circuits with frequent switching.
Specifications
| Product Model | HUM18-63 Miniature Circuit Breaker |
| Standard | IEC 60898-1 |
| Certifications | CB, CE, CCC, RoHS |
| Poles | 1P, 1P+N, 2P, 3P, 3P+N, 4P |
| Rated Current (A) | 1, 2, 3, 4, 6, 10, 16, 20, 25, 32, 40, 50, 63 |
| Rated Voltage | AC 230/400V (1P); AC 230V (1P+N); AC 400V (2P, 3P, 3P+N, 4P) |
| Frequency | 50/60Hz |
| Breaking Capacity Icu | 10,000A (10kA) |
| Breaking Capacity Ics | 7,500A (7.5kA) |
| Insulation Voltage Ui | 500V |
| Impulse Withstand Voltage | 4kV |
| Tripping Curve | Type B, C, D |
| Electrical Operations | 10,000 cycles |
| Mechanical Life | 20,000 cycles |
| Operating Temperature | -5°C ~ +45°C |
| Max. Wiring | 25mm² |
| Incoming Method | Top or bottom |
| Mounting | TH35-7.5 DIN Rail |
| MOQ | 2,000 pcs per item |
Get Factory-Direct Miniature Circuit Breaker Pricing
Full range 1P to 4P, B/C/D curves, 1A–63A. OEM branding, IEC/CE/CB/CCC documentation included. Request your wholesale quotation today.
MOQ 2,000 pcs • IEC 60898-1 / CB / CE / CCC / RoHS • Worldwide Shipping
Factory-Direct OEM/ODM Supply for Wholesale Partners
Your Source for Miniature Circuit Breakers
The HUM18‑63 series fills the higher-breaking-capacity MCB segment in your catalog. With CB, CE, CCC, and RoHS certifications, it meets regulatory requirements across Asia, Europe, and beyond. OEM laser marking, custom packaging, and full test documentation are standard for volume partners.
How to Choose the Right MCB — Current, Curve & Pole
A practical guide to selecting the HUM18‑63 miniature circuit breaker for your installation.
1. Current Rating – Match Your Load
The HUM18‑63 covers 1A to 63A. Lighting and control circuits: 1A–10A. Socket outlets: 16A–20A. Air conditioners, water heaters, and small motors: 25A–63A. Derate for ambient temperature: at 40°C, derate to ~90%. When multiple MCBs are placed side-by-side, apply a 0.8–0.9 grouping factor.
2. Trip Curve – B, C, or D?
Type B (3–5× In) for resistive loads — incandescent lighting, electric heating. Type C (5–10× In) for standard inductive loads — motors, pumps, HVAC. Type D (10–20× In) for high-inrush equipment — large transformers, industrial motors, x-ray machines. Refer to the tripping characteristic curve below for precise time-current behavior.
3. Number of Poles – System Topology
1P for single-phase protection. 1P+N adds neutral switching. 2P for two-pole isolation on 400V circuits. 3P and 3P+N for three-phase networks. 4P for complete disconnection. All share identical per-pole width.
4. Installation Notes
Mounts on TH35‑7.5 DIN rail, accepts 25mm² conductors with 2.0 N·m torque. Operates from -5°C to +45°C up to 2000m altitude. Pollution degree 2.
Frequently Asked Questions
What is the purpose of a miniature circuit breaker?
A miniature circuit breaker (MCB) automatically switches off an electrical circuit during overload or short-circuit conditions. It protects wiring and connected equipment from excessive current and prevents fire hazards. Unlike a fuse, it can be reset after tripping.
What is the difference between a mini circuit breaker and a regular circuit breaker?
The terms are often interchangeable. “Miniature circuit breaker” typically refers to modular DIN rail-mounted devices rated up to 125A, used in final distribution panels. “Regular circuit breaker” may refer to larger molded case circuit breakers (MCCBs) with higher ratings for main distribution.
What is the difference between a main circuit breaker and a miniature circuit breaker?
A main circuit breaker sits at the origin of an installation and isolates the entire panel. A miniature circuit breaker protects an individual branch circuit. The HUM18‑63 is a miniature circuit breaker designed for branch protection; its 10kA rating also allows use as a sub-main in certain configurations.
Is a miniature circuit breaker good?
Yes. A quality miniature circuit breaker that complies with IEC 60898-1 provides dependable overload and short-circuit protection for many years. The HUM18‑63 is backed by a 20,000-cycle mechanical life and full international certifications, making it a reliable choice for residential and commercial applications.
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