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Home > Products > Circuit Protection > Circuit Breakers > MD2-B-34-620-3-A16-2-E
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MD2-B-34-620-3-A16-2-E

In Stock 757 pcs Reference Price(In US Dollars)
2+
$48.6317
Manufacturer Part Number:
MD2-B-34-620-3-A16-2-E
Manufacturer / Brand
Carling Technologies
Part of Description:
CIRCUIT BREAKER
Datasheets:
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 757 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number MD2-B-34-620-3-A16-2-E
Manufacturer / Brand Carling Technologies
Stock Quantity 757 pcs Stock
Category Circuit Protection > Circuit Breakers
Description CIRCUIT BREAKER
Lead Free Status / RoHS Status: ROHS3 Compliant
Voltage Rating - DC 80 V
Voltage Rating - AC 250 V
Series M
Package Bulk
Number of Poles 2
Mounting Type Panel Mount
Illumination Voltage (Nominal) -
Illumination None
Current Rating (Amps) 20A
Breaker Type Magnetic (Hydraulic Delay)
Approval Agency CCC, CSA, TUV, UL
Actuator Type Rocker

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



We accept the payment terms: Telegraphic Transfer(T/T), Credit Card, PayPal and Western Union.

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Paypal ID: Info@IC-Components.com

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Payment For Telegraphic Transfers:
Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
Beneficiary Bank SWIFT : COMMHKHK
Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

Can MD2-B-34-620-3-A16-2-E be used on loads with high inrush current, such as motors, transformers, or large capacitive inputs?
Yes, MD2-B-34-620-3-A16-2-E is a magnetic (hydraulic delay) breaker, so it is generally better suited to loads with short start-up surges than a fast-acting thermal device. For design-in, check that the startup pulse is brief enough to avoid nuisance tripping and that the steady-state current stays within the application’s expected operating profile. If the load has repeated or prolonged inrush events, validate the trip behavior in the actual enclosure and ambient temperature.
How should I wire the two poles on MD2-B-34-620-3-A16-2-E in a 2-wire AC or DC system?
MD2-B-34-620-3-A16-2-E can be used to open two conductors simultaneously, which is useful when you want both sides of a circuit disconnected for service or fault isolation. In AC systems, that may mean switching line and neutral in a suitable architecture; in DC systems, confirm the polarity scheme and the system’s grounding arrangement before wiring. If the application requires only single-conductor protection, verify that a 2-pole device still matches the intended coordination strategy and local wiring rules.
Is MD2-B-34-620-3-A16-2-E a practical replacement for a fuse in a panel design?
MD2-B-34-620-3-A16-2-E can replace a fuse when you want resettable branch-circuit protection and operator-visible switching in one device. The trade-off is that a circuit breaker usually has a different trip profile and may not clear very fast fault energy as aggressively as a semiconductor fuse. For electronic loads, confirm that downstream components can tolerate the let-through energy and that the protection scheme still coordinates with the available fault current.
What should I verify before replacing an existing panel breaker with MD2-B-34-620-3-A16-2-E?
Before substituting MD2-B-34-620-3-A16-2-E, check the panel cutout, mounting depth, terminal style, actuator orientation, and the required pole count. Also confirm that the replacement keeps the same operating logic for ON/OFF indication and that the new breaker fits the existing wiring harness without strain or rework. If the original part had illumination or a different rocker geometry, the panel artwork and bezel clearance may need to be updated.
Is MD2-B-34-620-3-A16-2-E suitable for 80 VDC battery or telecom power systems?
MD2-B-34-620-3-A16-2-E can be used in DC systems up to its rated voltage, but the real check is the maximum voltage that can appear under all operating conditions, including charging transients and fault recovery behavior. DC interruption is more demanding than AC because the arc does not pass through a zero-crossing, so make sure the installation does not exceed the breaker’s DC interrupting context. For battery-backed systems, validate performance at the highest state-of-charge voltage, not only at nominal voltage.
Does the lack of illumination on MD2-B-34-620-3-A16-2-E affect integration in a control panel?
MD2-B-34-620-3-A16-2-E does not need a lamp supply or extra wiring for indicator power, which simplifies the panel and reduces points of failure. The trade-off is that there is no built-in illuminated status, so many designs add a separate pilot light, HMI indicator, or PLC input if operator visibility is needed. That separation can also make maintenance easier because the breaker function is independent of the indication circuit.
What reliability factors should I consider for industrial use of MD2-B-34-620-3-A16-2-E?
For long-term industrial service, MD2-B-34-620-3-A16-2-E should be evaluated for vibration, panel temperature, contamination, and switching frequency. Hydraulic-delay breakers can perform well in harsh environments, but repeated thermal cycling, poor ventilation, or dust ingress around the actuator can change how the mechanism feels and operates over time. Periodic functional checks and proper enclosure design help keep the protection behavior consistent.
Are there direct alternatives to MD2-B-34-620-3-A16-2-E from Carling or other brands if I need a migration path?
A migration from MD2-B-34-620-3-A16-2-E is usually safest within the same Carling M-series family or with another panel-mount hydraulic-magnetic breaker that matches the same pole count, actuator style, current rating, and voltage class. When comparing alternatives from brands such as Eaton, Sensata, or Schurter, check not only the nameplate ratings but also the trip curve, mounting envelope, terminal interface, and agency approvals. A part that looks similar can still behave differently under motor starting, repetitive overload, or DC interruption.
Is MD2-B-34-620-3-A16-2-E a good choice for semiconductor protection or other very fast fault-clearing needs?
MD2-B-34-620-3-A16-2-E is generally better as branch overcurrent protection than as primary protection for sensitive semiconductors that require extremely fast fault clearing. Hydraulic-delay breakers are designed to ride through short surges, which can be useful for inductive loads but may leave more let-through energy than a specialized fuse in a hard short. If the downstream device has a low surge tolerance, coordinate MD2-B-34-620-3-A16-2-E with a faster protective element closer to the component.

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