3RV20111CA20 | MPCB 1.8 – 2.5 A, Standard Release, O/L & S/C, Size S00 – Siemens

Name: Siemens MPCB 1.8-2.5A S00 | 3RV20111CA20 Motor Protector
Brand: Siemens
SKU: 3RV20111CA20
Price: 4642.00 INR
Availability: InStock

SKU: 3RV20111CA20

Original price was: ₹10,550.00.Current price is: ₹4,642.00. Excl. GST

15 People watching this product now!

Order protection

Buy with complete confidence.

We back each order with genuine supply, on-time dispatch and GST or commercial invoicing as required.

Buyer protection on every order

Global DeliveryShipped pan-India and to export markets.

On-Time DeliveryPacked and dispatched on schedule.

100% OriginalFrom brand-authorised channels only.

GST InvoiceCompliant, ITC-ready tax invoice.

Secure PaymentEncrypted, trusted payment gateways.

Also included Dedicated account manager Technical support Bulk & business pricing 3-day replacement

📋 Technical Specifications

Parameter	Value
Brand	Siemens
Part Number / SKU	3RV20111CA20
Category	Motor Protection Circuit Breaker (MPCB)
Series / Model	3RV
Current Rating	1.8–2.5 A
Standard	IEC 60947-4-1, IEC 60947-2
Certifications	BIS certified, CE, cULus (select models)

⚡ Key Features

Continuously adjustable current range 1.8–2.5 A — dial to the motor’s exact nameplate full-load current (FLC) for optimum overload protection without nuisance tripping.
Combined thermal and magnetic protection in one device — single MPCB replaces a separate motor-rated MCB plus thermal overload relay, saving DIN rail space and inter-device wiring.
Phase-loss and phase-unbalance detection — trips within seconds of a phase failure, protecting the motor from the severe overheating that single-phasing causes within minutes.
Manual reset only — operator must acknowledge and reset the MPCB after a trip, preventing automatic restart that could damage the motor or driven machinery.
Manufactured to IEC 60947-4-1 and IEC 60947-2 — complies with the applicable Indian BIS and IEC international standards for this product category.
BIS certified, CE, cULus (select models) — meets Indian regulatory requirements for use in government, commercial, and industrial electrical installations.
Genuine authorised Siemens product — sourced directly from the official distribution network with full manufacturer traceability and warranty.
GST invoice provided for India orders — valid for corporate procurement, government project orders, and public tender supply via myelectric.in.
Worldwide export available — UAE, Singapore, UK, USA, Sri Lanka & more. Contact +91 94814 00316 for bulk pricing and international shipping.

❓ Frequently Asked Questions

Q: How do I set the 1.8–2.5 A adjustable range on the 3RV20111CA20 for my motor?

A: Turn the setting dial to the motor’s nameplate full-load current (FLC) — the FLC must fall within the 1.8–2.5 A range of this device. Setting it at the motor FLC (not the maximum of the range) gives correct overload trip timing while still riding through normal starting inrush. If the motor FLC is outside this range, select the adjacent rating in the same series.

Q: What is the trip class of the 3RV20111CA20 and what motor starting time does it allow?

A: MPCBs are typically rated Class 10 (trips in ≤10 seconds at 7.2× setting current), suitable for normal motors with DOL starting times up to 10 seconds. Heavy-duty motors (large fans, centrifuges, compressors) with longer starting times may need Class 20 or Class 30 protection — check the starting time against the motor’s speed-torque curve and select accordingly.

Q: Can the 3RV20111CA20 replace a contactor + overload relay combination in a motor circuit?

A: The 3RV20111CA20 provides motor short-circuit protection and overload protection in one device — but it cannot make/break motor current under normal operational switching (that is the contactor’s role). For motor starters requiring on/off switching, the 3RV20111CA20 is used as the upstream protection device with a contactor for switching. Some MPCB series include a direct handle for manual starting of small motors without a separate contactor.

Q: Which Siemens accessories are compatible with the 3RV20111CA20?

A: The Siemens 3RV series supports snap-on accessories including auxiliary contacts (OF), alarm contacts (SD), shunt trip coils (MX), undervoltage releases (MN), and comb busbars. Accessories are series-specific — always verify compatibility using the Siemens product catalogue before ordering. myelectric.in can advise on the correct accessory part numbers for the 3RV20111CA20.

Q: What is the difference between a Motor Protection Circuit Breaker (MPCB) and a standard MCB — and why use the 3RV20111CA20?

A: A standard MCB protects against overload and short-circuit only. A Motor Protection Circuit Breaker (MPCB) adds adjustable thermal overload matched to motor FLC, Class 10/20 trip curves for motor starting inrush, and phase-loss sensitivity — making it the correct device for motor branch circuits where a standard MCB would either nuisance-trip on motor starting or fail to protect adequately against slow overloads. Choose the 3RV20111CA20 when the application specifically requires motor protection circuit breaker (mpcb) characteristics.