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CFUKF455KB4X-R0
Murata Electronics
CERM FILTER 455 KHZ
2530 Pcs New Original In Stock
Ceramic Filter 3-SMD, J-Lead
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*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (477 Ratings)
CFUKF455KB4X-R0
Product Overview
7157849
DiGi Electronics Part Number
CFUKF455KB4X-R0-DGManufacturer
Murata Electronics
CFUKF455KB4X-R0
Description
CERM FILTER 455 KHZInventory
2530 Pcs New Original In Stock
Ceramic Filter 3-SMD, J-Lead
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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365 - Day Quality Guarantee - Every part fully backed.
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CFUKF455KB4X-R0 Technical Specifications
Category
Ceramic Filters
Packaging
-
Series
CFUKF
Product Status
Obsolete
Mounting Type
Surface Mount
Package / Case
3-SMD, J-Lead
Size / Dimension
0.295" L x 0.236" W (7.50mm x 6.00mm)
Height (Max)
0.157" (4.00mm)
Base Product Number
CFUKF
Datasheet & Documents
HTML Datasheet
CFUKF455KB4X-R0-DG
Environmental & Export Classification
Moisture Sensitivity Level (MSL)
5 (48 Hours)
REACH Status
REACH Affected
ECCN
EAR99
HTSUS
8543.70.9860
Additional Information
Other Names
490-7739-6
490-7739-1
490-7739-2
Standard Package
450
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
내구력이 뛰어난 제품이라 강한 사용에도 끄떡없고, 포장도 꼼꼼하게 되어 있어 믿음이 갔어요.
December 02, 2025
寄貨速度快，包裝完整，讓我感受到他們的專業與用心。
December 02, 2025
配送の迅速さと梱包の丁寧さに感動しました。
December 02, 2025
Choosing DiGi Electronics ensures dependable, high-quality products with prompt delivery.
December 02, 2025
The shipping speed is incredible—my items almost always arrive within a day or two, and they hold up well over time.
December 02, 2025
Their customer service exceeds expectations, especially in post-purchase care.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the Murata CFUKF455KB4X-R0 ceramic filter in a new production design given its obsolete status?
Using the Murata CFUKF455KB4X-R0 in new designs carries significant supply chain risk due to its obsolete status. While 2,430 units are in stock, long-term availability is not guaranteed, increasing the risk of production disruption. Engineers should treat this part as a last-resort option for legacy system repairs or very low-volume production. For new designs, evaluate active-replacement alternatives like the TDK CFSB4M500A103 or conduct a redesign using SAW filters or active RC bandpass stages with op-amps. Always secure second-source options and consider lifetime buy strategies when using obsolete components.
How does the Murata CFUKF455KB4X-R0 compare to the TDK CFSB455KB4H in terms of insertion loss and stability for 455 kHz IF filtering applications?
The Murata CFUKF455KB4X-R0 and TDK CFSB455KB4H both target 455 kHz intermediate frequency filtering, but Murata typically offers slightly lower insertion loss (~2.5 dB vs. ~3.0 dB) and tighter center frequency tolerance. However, TDK's device remains in active production, offering better long-term reliability for new designs. Substituting one for the other requires verifying circuit gain margins due to loss differences and checking PCB footprint compatibility—the TDK part has a similar 3-SMD J-lead package but may require minor layout adaptation. Evaluate temperature stability over your operating range, as Murata units can exhibit slightly better drift performance in legacy designs.
Can the Murata CFUKF455KB4X-R0 be hand-soldered reliably during prototyping or repair, and what thermal profile should be followed to avoid damaging the ceramic element?
Yes, the Murata CFUKF455KB4X-R0 can be hand-soldered, but strict thermal controls are needed to avoid cracking the ceramic resonator. The MSL 5 rating (48-hour floor life) means parts must be baked if exposed to humidity before soldering. Use a soldering iron at 300°C maximum with a dwell time under 3 seconds per terminal. Avoid mechanical stress during and after soldering due to the J-lead configuration's fragility. For reflow, follow J-STD-020 with peak temperatures not exceeding 240°C. Always inspect for microcracks post-soldering, as they can shift center frequency or increase insertion loss.
What are the critical layout considerations when integrating the Murata CFUKF455KB4X-R0 into a high-reliability IF stage to maintain its filter characteristics?
To preserve the performance of the Murata CFUKF455KB4X-R0, minimize trace lengths to reduce stray capacitance and inductance that can detune the 455 kHz response. Maintain a solid ground plane underneath the filter but remove copper directly under the body to prevent thermal stress during soldering. Keep high-noise signals (e.g., digital clocks) at least 5 mm away to avoid coupling. Use symmetric, equal-length traces for input and output to maintain balance, and ensure input drive level does not exceed +3 dBm to prevent nonlinear effects. Proper layout prevents frequency shifts and ensures specified bandwidth and rejection are achieved.
What are suitable drop-in replacements for the Murata CFUKF455KB4X-R0 in repair or redesign scenarios where original performance must be maintained?
Direct drop-in replacements for the Murata CFUKF455KB4X-R0 are limited due to its obsolete status. The closest alternatives include the TDK CFSB455KB4H or Syfer 455KHZC180Y, which match the 455 kHz center frequency, ±4 kHz bandwidth, and SMD J-lead footprint. However, verify insertion loss (target <3 dB), impedance (typically 180 Ω), and temperature stability (-10°C to +60°C). Some substitutes may require minor gain adjustment in the preceding IF amplifier stage. For high-volume replacements, consider redesigning with a DSP-based digital filter or an active RC topology for improved consistency and availability.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
CFUKF455KB4X-R0 CAD Models
Murata Electronics CFUKF455KB4X-R0 PCB symbols & footprints
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