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Home > Products > Circuit Protection > Fuses > BK1/TDC11-1.25R
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BK1/TDC11-1.25R

In Stock 49118 pcs Reference Price(In US Dollars)
1+
$1.2572
200+
$0.4864
500+
$0.4698
1000+
$0.4623
Manufacturer Part Number:
BK1/TDC11-1.25R
Manufacturer / Brand
Eaton - Electronics Division
Part of Description:
FUSE 1.25A 3AB 3AG
Datasheets:
BK1/TDC11-1.25R.pdf
Lead Free Status / RoHS Status:
RoHS non-compliant
Stock Condition:
New original, 49118 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number BK1/TDC11-1.25R
Manufacturer / Brand Eaton - Electronics Division
Stock Quantity 49118 pcs Stock
Category Circuit Protection > Fuses
Description FUSE 1.25A 3AB 3AG
Lead Free Status / RoHS Status: RoHS non-compliant
Size / Dimension 0.250" Dia x 1.252" L (6.35mm x 31.80mm)
Series -
Package / Case 3AB, 3AG, 1/4" x 1-1/4"
Package Bulk
Mounting Type Requires Holder

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: PayPal@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

Can BK1/TDC11-1.25R be used as a drop-in replacement for another 1.25A 3AB/3AG fuse?
BK1/TDC11-1.25R matches the common 1/4" x 1-1/4" 3AB/3AG cartridge size, so it can physically replace another fuse with the same envelope. For a true drop-in replacement, confirm the voltage rating, time-current characteristic, and interrupting rating of the replacement part. Two 1.25A fuses can protect the same circuit very differently if one opens faster or has a different fault-clearing capability.
What holder do I need for BK1/TDC11-1.25R, and can it be mounted directly on a PCB?
BK1/TDC11-1.25R requires a holder designed for 3AB/3AG cartridge fuses and is not a direct PCB-mount device. In a design-in, check the holder’s current rating, contact material, thermal rise, and creepage/clearance for the system voltage. For equipment subject to vibration, verify clip retention and contact stability, since added resistance at the holder can create heat long before the fuse element opens.
Is BK1/TDC11-1.25R suitable for transformer, motor, or capacitor inrush current?
BK1/TDC11-1.25R can work with inrush-heavy loads only if its time-current behavior matches the startup waveform. For transformer primaries, motor loads, or circuits with large bulk capacitors, compare the startup pulse to the fuse’s melting I²t and published curve. If nuisance opening occurs during normal start-up, the usual fix is to match the fuse curve to the load profile rather than increasing current rating alone.
Can BK1/TDC11-1.25R be used on DC systems as well as AC mains?
BK1/TDC11-1.25R is listed as an AC/DC fuse, but the usable voltage still depends on the complete electrical rating and the fault current in your circuit. For DC applications, confirm that the fuse voltage rating covers the maximum bus voltage and that the interrupting rating is adequate for the worst-case fault, because DC arcs are harder to extinguish than AC arcs.
How do I choose a safe alternative if BK1/TDC11-1.25R is unavailable?
For BK1/TDC11-1.25R, select an alternative only after matching the physical size, 1.25A nominal current, voltage rating, interrupting rating, and time-current profile. Comparable 3AB/3AG cartridge fuses from Eaton, Littelfuse, Bel Fuse, or SIBA may fit mechanically, but the protection behavior can still differ. A part that is physically compatible but electrically faster or slower can change nuisance-blow behavior and fault clearing performance.
What should I check if BK1/TDC11-1.25R will be used in an industrial enclosure with high ambient temperature?
With BK1/TDC11-1.25R, elevated ambient temperature, restricted airflow, and warm fuse holders can reduce operating margin and increase contact heating. Check the derating guidance in the full datasheet and validate the holder temperature rise inside the enclosure. In vibration-prone equipment, also verify contact retention, because micro-motion at the holder can create localized heating before the fuse element opens.
Is BK1/TDC11-1.25R suitable when I need RoHS-compliant production hardware?
BK1/TDC11-1.25R is listed as RoHS non-compliant, so it may not fit a BOM that must meet RoHS or customer environmental requirements. That can affect procurement, export documentation, and product compliance planning. If your design must remain within a restricted-substance program, select a functionally similar compliant 3AB/3AG fuse and confirm the same electrical behavior before releasing the design.
What are the main reliability checks for BK1/TDC11-1.25R in long-term service or replacement programs?
For BK1/TDC11-1.25R, long-term reliability depends less on the fuse element itself and more on the holder, contact plating, thermal cycling, and mechanical stress. In service programs, inspect for discoloration, loose clips, cracked cartridge bodies, and signs of increased contact resistance. If the fuse opens repeatedly, it usually indicates an upstream load or transient issue, so replacing it with a higher current rating without analysis can mask the underlying fault.
Is BK1/TDC11-1.25R appropriate for protecting semiconductors, or should I use a different fuse class?
BK1/TDC11-1.25R can provide branch or equipment protection, but it is not automatically the best choice for very fast semiconductor protection. If your design must protect MOSFETs, rectifiers, or power modules, compare its clearing energy and time-current curve with the device SOA and pick a fuse family intended for low let-through energy if needed. The 3AB/3AG form factor alone does not guarantee protection at the semiconductor level.

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BK1/TDC11-1.25R

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