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Home > Products > Circuit Protection > Circuit Breakers > MD2-B-34-620-1-A35-B-C
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MD2-B-34-620-1-A35-B-C

In Stock 1084 pcs Reference Price(In US Dollars)
3+
$34.9688
Manufacturer Part Number:
MD2-B-34-620-1-A35-B-C
Manufacturer / Brand
Carling Technologies
Part of Description:
CIRCUIT BREAKER
Datasheets:
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 1084 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-A35-B-C
Manufacturer / Brand Carling Technologies
Stock Quantity 1084 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 are the key integration constraints when mounting the Carling Technologies MD2-B-34-620-1-A35-B-C in a panel for a 2-pole application?
The MD2-B-34-620-1-A35-B-C is designed for front panel snap-in or bushing mounting with a rocker actuator. Engineers must ensure the panel cutout matches the standard dimensions for M-Series 2-pole rockers, typically around 33.76 x 37.08 mm, and account for the overall package depth of approximately 48 mm to clear internal wiring and adjacent components. The 2-pole configuration requires proper alignment of both poles for simultaneous actuation.
How does the hydraulic-magnetic delay mechanism of the MD2-B-34-620-1-A35-B-C affect inrush current handling during integration with switching power supplies or motor loads?
The magnetic (hydraulic delay) design in the MD2-B-34-620-1-A35-B-C provides consistent trip characteristics that tolerate moderate inrush currents better than purely thermal devices in many cases, as the delay is achieved through fluid damping of the core rather than bimetallic heating. For design-in, select the specific delay curve (medium in this variant) and verify against the load's inrush profile using Carling's time-delay curves to avoid nuisance tripping while ensuring protection at 135% or greater of the 20A rating.
Can the Carling Technologies MD2-B-34-620-1-A35-B-C be used in applications with significant ambient temperature variation, such as outdoor industrial enclosures?
Hydraulic-magnetic breakers like the MD2-B-34-620-1-A35-B-C maintain relatively stable trip points across wide temperature ranges because the delay relies on magnetic force and fluid viscosity rather than ambient-dependent bimetallic expansion. This behavior supports use in environments from sub-zero to elevated temperatures where thermal-magnetic alternatives may shift their overload trip thresholds.
What design considerations arise when replacing a thermal-magnetic circuit breaker with the Carling Technologies MD2-B-34-620-1-A35-B-C in an existing industrial control panel?
When migrating to the MD2-B-34-620-1-A35-B-C, note that its hydraulic-magnetic operation delivers more temperature-independent performance compared to thermal-magnetic types, which can result in different overload response times. Panel cutout compatibility, rocker actuator orientation, and terminal style (typically 0.250" tabs) should be verified, along with confirming that the 20A rating and 250VAC/80VDC limits align with the original circuit requirements.
Is the MD2-B-34-620-1-A35-B-C suitable for DC-only applications at voltages approaching its maximum rating?
The MD2-B-34-620-1-A35-B-C carries an 80V DC rating for the 2-pole configuration. In DC systems, arc extinction is more challenging than in AC, so designers should stay well below this limit or add appropriate derating when switching inductive DC loads to ensure reliable interruption within the breaker's capabilities.
What factors should be evaluated when considering the MD2-B-34-620-1-A35-B-C for long-term use in vibration-prone environments like transportation or marine equipment?
The M-Series construction, including the wiping contact mechanism, contributes to contact reliability over repeated cycles. The hydraulic-magnetic principle offers good resistance to vibration effects on the trip mechanism compared to devices relying solely on mechanical thermal elements, supporting extended operation in such conditions when the panel mounting is secured properly.
How do I determine if the Carling Technologies MD2-B-34-620-1-A35-B-C can serve as a direct replacement for similar 20A 2-pole M-Series breakers with different delay codes or actuator options?
Compatibility with other M-Series variants depends on matching the current rating (20A), pole count, voltage ratings, and mounting footprint. The MD2-B-34-620-1-A35-B-C uses a specific medium delay and rocker style; changing to a different delay curve may alter inrush tolerance, while actuator variations require confirming the panel aesthetics and actuation force without affecting the core magnetic-hydraulic trip behavior.
What are the practical limits for using the MD2-B-34-620-1-A35-B-C in high-interrupting-capacity scenarios or alongside upstream protection?
The MD2-B-34-620-1-A35-B-C is UL 1077 recognized with interrupting capacities typically up to 1,000A in AC applications (lower in some DC or certified limits). In systems with available fault current exceeding this, coordination with upstream branch or feeder protection is necessary to ensure the breaker operates within its tested limits without damage.
When integrating the Carling Technologies MD2-B-34-620-1-A35-B-C into a mixed AC/DC control system, what wiring and polarity considerations apply?
For the 2-pole MD2-B-34-620-1-A35-B-C, both poles should be utilized appropriately for the circuit configuration. In DC applications, observe correct polarity where applicable and ensure the combined voltage across poles does not exceed the 80V DC rating, while AC operation up to 250V leverages the breaker's sinusoidal current interruption characteristics.
What reliability aspects come into play for the MD2-B-34-620-1-A35-B-C in continuous industrial operation with frequent on/off cycling?
The rocker actuator and internal wiping contacts in the MD2-B-34-620-1-A35-B-C are engineered for repeated mechanical operation. Hydraulic-magnetic technology avoids the cumulative fatigue sometimes seen in thermal elements under varying loads, contributing to consistent performance over many cycles when operated within the 20A continuous rating and approved environmental conditions.

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