EXB3L1 100 RCCB – 100A 30mA 100mA 300mA,2P/4P,Type AC/A
The EXB3L1-100 is a residual current circuit breaker (RCCB) rated 16A–100A for AC 240V (2P) or 415V (4P) circuits. Provides earth leakage protection only — no overcurrent function. Residual current sensitivity: 10mA, 30mA, 100mA, 300mA. Type AC/A. 10kA conditional short-circuit rating. Wide operating range: -35°C to +70°C. 50mm² wiring capacity, 3.5 N·m torque. IP40 in enclosure. TH35-7.5 DIN rail mount.
Standards: IEC 61008-1, GB/T 16916.1
Rated Current: 16A – 100A
Residual Current: 10mA, 30mA, 100mA, 300mA
Conditional Short-Circuit: 10kA
Poles: 2P, 4P
Type: AC, A
Wiring: 50mm², 3.5 N·m
Mounting: TH35-7.5 DIN Rail
Product Information
EXB3L1-100 RCCB – No Overcurrent Protection to Earth Leakage Protection (up to 100A)
If the circuit already has over-current protection – by means of an MCB (Miniature Circuit Breaker) or a fuse – then adding earth leakage detection into the circuit will not necessitate the use of an RCBO (Residual Current Circuit Breaker with Overcurrent Protection). The HUYU Electric EXB3L1-100 is a dedicated residual current circuit breaker (RCCB); it is an RCCB that has the ability to detect earth leakage (residual) current and will safely disconnect the circuit without providing overload or short-circuit protection.
The EXB3L1-100 is available in 16A to 100A ratings (2-pole at 240V and 4-pole at 415V), complies with all IEC 61008-1 and GB/T 16916 (exposure to residual current up to 300mA for both Type A and Type AC RCCBs).
The primary difference between the EXB3L1-100 and the smaller type RCCBs is in its physical characteristics; the terminals of the EXB3L1-100 will accommodate conductors of up to 50mm² at 80A and 100A with a torque of 3.5 N·m. The EXB3L1-100 has a conditional short-circuit rating of 10kA, so it will be suitable to be used in installations where there is a high prospective fault current, as long as there is the appropriate coordination of the upstream overcurrent protection.
The EXB3L1-100 has an operating range of -35ºC to +70ºC and an IP40 rating in an enclosure, so it can be used in outdoor distribution kiosks and plant rooms. For distributors carrying RCCBs from Schneider, ABB, Chint, Hager, Eaton, Siemens, Legrand or Havells, HUYU Electric distributes factory-direct OEM/ODM pricing with private labeling and full documentation. This product is a pure residual current circuit breaker. If paired with either an MCB or fuse, it will provide complete protection to the circuit in which it is installed.
2P and 4P RCCB Configuration and Sensitivity Options from 10mA to 300mA
| Pole | Rated Current | Options for IΔn | Residual Types | Voltage | Application |
|---|---|---|---|---|---|
| 2P | 16A – 100A | 10, 30, 100, 300 mA | AC, A | AC 240V | Single-phase main incomer; Earth-leakage on sub-mains. |
| 4P | 16A – 100A | 10, 30, 100, 300 mA | AC, A | AC 415V | Three-phase; main incomer; Three-phase earth protection with RCCB. |
All models have a 10kA conditional short-circuit rating and can be ordered as Type AC (sinusoidal leakage) or Type A (sinusoidal + pulsating DC leakage). The 10mA sensitivity is for circuits where there is a requirement for the very low leakage threshold; the standard sensitivity of 30mA is for providing shock protection to personnel; 100mA is for providing protection to the equipment and for providing fire protection to the building; 300mA is for providing fire protection to the building. The RCCB circuit breaker only detects leakage; it does not provide overcurrent; overcurrent protection must be provided either downstream or upstream from the RCCB circuit breaker.
When to Choose RCCB vs. RCBO for Protection from Earth Leakage Only
A typical electric RCCB (like the EXB3L1-100) detects an earth leakage condition (i.e., earth leakage) and trips to isolate the circuit when the actual residual current reaches a pre-defined threshold. However, it does not incorporate a thermal or magnetic trip unit that would trip for the occurrence of an overcurrent condition, which allows it to be used in situations where the overcurrent protection is already provided for the circuit in question, such as being downstream of an MCCB protecting a busbar or as an incoming main earth leakage device for multiple independently fused serving circuits. While an RCBO provides both overcurrent and earth leakage protection in one device, an RCCB may be used to provide earth leakage protection for multiple circuits when it is installed upstream of multiple MCBs. In many residential and commercial buildings, the residual current device (RCD) is installed as a two-pole (2P) or four-pole (4P) switchboard as part of the consumer unit to provide an earth leakage protection device for all downstream circuits and MCBs/p will provide overcurrent protection for each serving branch or circuit.
Technical Information
| Model No. | EXB3L1-100 |
| Type | Residual Current Operated Circuit Breaker (Magnetic) |
| Standards | IEC 61008-1, GB/T 16916.1 |
| Poles | 2P, 4P |
| Rated Current In(A) | 16, 25, 32, 40, 50, 63, 80, 100 |
| Rated Voltage Ue | AC 240V (2P); AC 415V (4P) |
| Frequency | 50/60Hz |
| Residual Current Type | Type AC, Type A |
| Residual Current IΔn(mA) | 10(16–40A), 30, 100, 300 |
| Conditional Short-Circuit Inc | 10,000A (10kA) |
| Residual Conditional S.C. | 10,000A (10kA) |
| Making & Breaking Im | 1,000A |
| Insulation Voltage Ui | 500V |
| Impulse Withstand Uimp | 4kV |
| Electrical Life | 10,000 cycles |
| Mechanical Life | 20,000 cycles |
| Operating Temperature | -35°C ~ +70°C |
| Max. Wiring | 50mm² |
| Max. Torque | 3.5 N·m |
| Incoming Method | Top-in, bottom-out |
| Mounting | TH35-7.5 DIN Rail |
| Protection Degree | IP20 (direct); IP40 (in enclosure) |
| MOQ | 2,000 pcs per item |
Source 100A RCCB at Factory-Direct Pricing
2P & 4P, 16A–100A, 10mA/30mA/100mA/300mA. Type AC/A. 10kA conditional. 50mm² terminals, 3.5 N·m. -35°C to +70°C. OEM branding and complete documentation. Request a wholesale quotation today.
MOQ 2,000 pcs • IEC 61008-1 / GB/T 16916.1 • Worldwide Shipping
OEM/ODM Supply – RCCB for Wholesale & Project Buyers
EXB3L1-100 – A Dedicated Residual Current Circuit Breaker for Main and Sub-Main Protection
If your customers currently install RCCBs or ELCBs from Schneider, ABB, Chint, Hager, Eaton, Siemens, Legrand, or Havells, the EXB3L1-100 offers equivalent IEC 61008-1 compliance in a robust 100A frame. With magnetic residual current tripping, Type AC/A detection, and 10mA to 300mA sensitivity options, it covers applications from residential main incomer protection to equipment-level leakage detection in industrial boards. The 50mm² terminal capacity and 3.5 N·m torque accommodate large conductors, while the -35°C to +70°C range suits harsh environments. OEM laser marking, private-label packaging, and complete test documentation are standard for volume orders.
RCCB Selection – Current Rating, Sensitivity, & Type
This document is intended to assist you with your selection of the EXB3L1-100 for main incomers, sub-mains and equipment leakage protection.
1. Selecting the Current Rating
The EXB3L1-100 is available in eight steps with current ratings ranging from 16 Amps to 100 Amps. For a residential main incomer powered by 100 Amps, select the 100A 2 pole device. Three-phase sub-mains for commercial applications can be typically 63A or 80A and will use a 4 pole device.
Note: The current rating on an RCCB (EXB3L1-100) will apply to the load current that the device can safely carry continuously (i.e., this is not a trip threshold over current as is typical on an RCBO). MCB, MCCB, or fuse must provide overcurrent protection and must be upstream of the RCCB.
2. Selecting the Residual Current (IΔn)
30mA is recommended for personnel shock prevention circuits (e.g., bathroom circuits and socket). Use 100mA for multiple downstream circuits that will have higher overall leakage (a 30mA RCCB may nuisance trip if more than one circuit is being protected). 300mA is recommended for fire protection on the main incomer and 10mA is used for very low earth leakage thresholds (16-40A rating such as hospital or laboratory equipment feeds).
3. Type AC or Type A?
TYPE AC or TYPE A refers to the two different RCCB types. Type AC only detects pure sinusoidal earth leakage (standard for non-inductive load circuits—resistive loads, motors, and general loads). TYPE A detects pulsating DC earth leakage from rectifiers, inverters, and switch-mode power supplies. Specify TYPE A when your downstream circuits include LED drivers, electronic appliance controls, or variable speed drives. EXB3L1-100 offers both types in the same device family.
4. RCCB vs RCBO vs ELCB – What do you need?
- RCCB (Residual Current Circuit Breaker) provides detection of earth leakage only (no overcurrent protection) and is used in conjunction with MCB/MCCB or fuses to provide required overcurrent protection.
- RCBO (Residual Current Breaker with Overcurrent) provides expanded circuit protection by combining both earth leakage and overcurrent protection in one device. Use for circuit protection on an individual basis, as space and fault isolation are of high importance.
- ELCB (Earth Leakage Circuit Breaker): This is an older term and could be voltage or current operated devices. The EXB3L1-100 is a current operated RCCB that conforms to the IEC 61008-1, which is the modern standard for earth leakage protection devices. For RCBO options, see HUYU’s EXB3LE and HUM18LE series.
Frequently Asked Questions
What is an RCBO?
An RCBO (residual current breaker with overcurrent) is the combination of a circuit breaker (MCB) and RCD (shock) protection in one device. The RCBO provides protection against overload, short circuit, and earth leakage. This differs from the EXPBL1-100 RCCB which provides only earth fault detection and must be fitted separately with an overload device.
Disadvantages of RCBO?
RCBOs are more expensive for a given circuit than a shared RCCB protecting a bank of MCBs. They also use more space on the DIN rail than a shared RCCB/MCB arrangement. In installations where the isolation of individual circuits is not important, then a single RCCB protecting multiple MCBs (which the EXB3L1-100 has been designed for) may be more cost-effective and use less space.
What is the difference between RCBO and circuit breaker?
A standard circuit breaker (MCB) provides only overload protection. An RCBO provides both overload and earth fault protection. The EXB3L1-100 is neither because it is an RCCB and it provides no overload protection. It must be installed with a circuit breaker or fuse to provide overload protection. The selection between RCCB, RCBO, and MCB depends on the type of installation and the protection strategy.
Which is better? RCBO or RCCB?
Neither RCBO nor RCCB is universally better; they are both designed for different applications. RCBO provides individual protection on each circuit: one device provides both overload and earth fault protection at a single point in the circuit, so one circuit fault will not affect another. An RCCB offers protection to all circuits from earth leakage; however, an RCCB will not provide overload protection, so overload devices must be separate. Use an RCCB if you require overall earth leakage protection and you have already provided overload protection; use an RCBO when individual circuit protection or isolation is more important.
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