Type B
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Type B RCDs – All-Current Sensitive Residual Current Circuit Breakers (RCCB Type B)
Shop our high-quality Type B RCDs (also known as RCD Type B, Type B RCCB, or Type B circuit breakers) – essential for advanced electrical safety in installations with DC components. These all-current sensitive devices detect AC, pulsating DC, and smooth DC fault currents, making them mandatory for EV charging stations, photovoltaic (PV) systems, frequency converters, variable speed drives, medical equipment, and industrial applications.
All models are 4-pole, 10kA breaking capacity, VDE/CE certified, and available in 40A/63A with 30mA (personal protection) or 300mA (fire protection). Competitive prices starting at €99, fast shipping across Germany and the EU, plus exclusive B2B wholesale discounts.
What Makes Type B RCDs Essential?
Standard Type AC or Type A RCDs can be "blinded" by smooth DC residual currents from inverters or chargers, failing to trip. Type B RCDs provide complete protection by detecting:
- Sinusoidal AC currents
- Pulsating DC currents
- Smooth DC currents
- High-frequency currents up to 1000 Hz
This ensures reliable operation and prevents electric shocks or fires in modern systems.
RCD Types Comparison
| RCD Type | AC Currents | Pulsating DC | Smooth DC | High-Frequency | Typical Applications | Required For |
|---|---|---|---|---|---|---|
| Type AC | Yes | No | No | No | Basic household appliances | Simple resistive loads |
| Type A | Yes | Yes | No | Limited | Washing machines, IT equipment | Pulsating DC loads |
| Type B | Yes | Yes | Yes | Up to 1000 Hz | EV chargers, PV inverters, frequency converters | Systems with smooth DC risk |
Our Type B RCD Range
- 40A / 30mA – Ideal for personal protection in EV charging
- 40A / 300mA – Fire protection applications
- 63A / 300mA – Higher load industrial use
- All 4-pole, 10kA, DIN rail mounting
Frequently Asked Questions (FAQ)
- What is a Type B RCD?
- A Type B residual current device detects all types of fault currents (AC, pulsating DC, smooth DC) – essential where standard RCDs fail.
- When do I need a Type B RCD instead of Type A?
- Required for EV chargers without built-in 6mA DC protection, PV systems, frequency converters, medical devices, and any installation with potential smooth DC leakage.
- Is Type B RCD mandatory for EV charging stations?
- Yes, in most cases – especially if the charger lacks integrated RDC-DD (6mA DC detection). Type B ensures full compliance and safety.
- What is the difference between 30mA and 300mA?
- 30mA for personal shock protection (trips faster), 300mA for fire and equipment protection.
- Are your Type B RCDs VDE certified?
- Yes – all models meet VDE, CE, and DIN standards for guaranteed quality.
- How much does a Type B RCD cost?
- Our prices start at €99 for 40A/30mA models – excellent value with B2B discounts available.
B2B advantages: Volume pricing, 0% VAT for EU business customers, fast delivery. Contact us for quotes or technical advice!