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Home > Products > Circuit Protection > Circuit Breakers > MD2-B-34-620-1-A36-B-C
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MD2-B-34-620-1-A36-B-C

In Stock 660 pcs Reference Price(In US Dollars)
3+
$51.7394
Manufacturer Part Number:
MD2-B-34-620-1-A36-B-C
Manufacturer / Brand
Carling Technologies
Part of Description:
CIRCUIT BREAKER
Datasheets:
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 660 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number MD2-B-34-620-1-A36-B-C
Manufacturer / Brand Carling Technologies
Stock Quantity 660 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, UL1077
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 Bank Information:
Company Name : IC COMPONENTS LTD
Paypal ID: Info@IC-Components.com

BANK TRANSFAR (Telegraphic Transfer)

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

What panel cutout dimensions and mounting constraints should engineers consider when integrating the MD2-B-34-620-1-A36-B-C into a front panel design?
The MD2-B-34-620-1-A36-B-C uses a standard snap-in front panel mounting for the M-Series rocker actuator. Designers typically prepare a rectangular cutout compatible with the miniature housing dimensions to ensure secure retention without additional fasteners. Account for the rocker bezel clearance, including the Rockerguard feature that extends slightly to reduce inadvertent actuation, and verify panel thickness compatibility for proper snap engagement in space-constrained industrial or telecom enclosures.
How does the hydraulic-magnetic delay mechanism of the MD2-B-34-620-1-A36-B-C behave during high inrush current events compared to standard thermal breakers?
The MD2-B-34-620-1-A36-B-C employs a hydraulic-magnetic design with a medium time delay (code 34 for 50/60Hz), allowing it to hold at 100% rated current while providing a controlled trip response above 135% that accommodates moderate inrush without immediate opening. This differs from thermal breakers whose response varies more directly with ambient temperature and may nuisance trip on repetitive surges common in power supply or motor start applications.
Can the MD2-B-34-620-1-A36-B-C be used in a 24V DC industrial control system, and what are the practical voltage and current boundaries?
The MD2-B-34-620-1-A36-B-C is rated for 80 V DC maximum on its two-pole configuration. At 24V DC, it supports the full 20A rating within the series trip circuit, provided the application stays below the interrupting capacity limits. Engineers should confirm the specific delay curve performance at DC, as hydraulic fluid viscosity influences the exact trip timing under lower voltage DC conditions.
What are the key considerations when evaluating the MD2-B-34-620-1-A36-B-C for long-term use in environments with wide ambient temperature swings, such as outdoor telecom enclosures?
The hydraulic-magnetic construction of the MD2-B-34-620-1-A36-B-C maintains relatively stable trip characteristics across temperature variations compared to purely thermal devices, as the magnetic element provides consistent sensing while the hydraulic delay experiences only moderate viscosity-based shifts. Operating range typically spans -40°C to +85°C; in extended exposure scenarios, periodic functional verification helps confirm continued performance alignment with the original design parameters.
When migrating from a single-pole thermal breaker to the two-pole MD2-B-34-620-1-A36-B-C in an AC-powered system, what design adjustments are commonly required?
The MD2-B-34-620-1-A36-B-C provides simultaneous two-pole protection at 250 V AC / 20A, requiring wiring both poles in series or across phases as needed for the application. Designers often need to update panel layout for the wider footprint, ensure terminal compatibility with 0.250” quick-connect tabs or equivalent, and re-verify creepage and clearance distances to maintain isolation in the upgraded assembly.
Is the MD2-B-34-620-1-A36-B-C suitable for applications involving frequent on-off cycling, such as test equipment power distribution?
The wiping contact design in the MD2-B-34-620-1-A36-B-C supports repeated mechanical operation while helping maintain low contact resistance over time. The rocker actuator allows direct manual control, and the hydraulic-magnetic mechanism permits immediate reset after a trip once the fault condition clears, facilitating use in cycling scenarios without extended cool-down periods associated with some thermal alternatives.
What replacement or cross-reference factors arise when substituting the MD2-B-34-620-1-A36-B-C for an older Carling M-Series unit with a different delay code?
Matching the 20A rating, two-pole configuration, and rocker actuator is primary, but the specific delay curve (34: medium for AC/DC 50/60Hz) in the MD2-B-34-620-1-A36-B-C should be compared against the original to ensure comparable inrush tolerance and trip timing. Differences in delay may require validation under actual load profiles to avoid earlier or delayed response in sensitive electronic or inductive circuits.
In a redundant power supply design for medical or industrial equipment, how does the interrupting capacity of the MD2-B-34-620-1-A36-B-C influence fault handling?
The MD2-B-34-620-1-A36-B-C offers an interrupting capacity up to 1,000 amps at rated AC/DC voltages under UL1077. In parallel or redundant setups, this rating determines the maximum prospective short-circuit current the breaker can safely clear without damage, guiding upstream fuse or breaker coordination to protect the overall system integrity.
What terminal and wiring considerations apply when integrating the MD2-B-34-620-1-A36-B-C into a DIN-rail or chassis-mounted assembly with quick-connect terminations?
The MD2-B-34-620-1-A36-B-C typically features 0.250” quick-connect tabs. Proper crimping tools and wire gauge selection (sized for 20A continuous with margin) ensure reliable connections; engineers should also consider vibration resistance in industrial settings and apply appropriate strain relief to prevent mechanical stress on the panel-mounted breaker body over time.
How does the absence of auxiliary contacts on the MD2-B-34-620-1-A36-B-C affect monitoring options in a control panel integration?
Without built-in auxiliary switches, the MD2-B-34-620-1-A36-B-C relies on external sensing methods, such as voltage monitoring across the load side or separate current sensors, for status feedback. This configuration simplifies the base design but may necessitate additional components when remote trip indication or interlock signaling is required in the system architecture.

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