Please refer to the English Version as our Official Version.

Europe: France~~(Français)~~ Germany~~(Deutsch)~~ Italy~~(Italia)~~ Russian~~(русский)~~ Poland~~(polski)~~ Czech~~(Čeština)~~ Luxembourg~~(Lëtzebuergesch)~~ Netherlands~~(Nederland)~~ Iceland~~(íslenska)~~ Hungarian~~(Magyarország)~~ Spain~~(español)~~ Portugal~~(Português)~~ Turkey~~(Türk dili)~~ Bulgaria~~(Български език)~~ Ukraine~~(Україна)~~ Greece~~(Ελλάδα)~~ Israel~~(עִבְרִית)~~ Sweden~~(Svenska)~~ Finland~~(Svenska)~~ Finland~~(Suomi)~~ Romania~~(românesc)~~ Moldova~~(românesc)~~ Slovakia~~(Slovenská)~~ Denmark~~(Dansk)~~ Slovenia~~(Slovenija)~~ Slovenia~~(Hrvatska)~~ Croatia~~(Hrvatska)~~ Serbia~~(Hrvatska)~~ Montenegro~~(Hrvatska)~~ Bosnia and Herzegovina~~(Hrvatska)~~ Lithuania~~(lietuvių)~~ Spain~~(Português)~~ Switzerland~~(Deutsch)~~ United Kingdom~~(English)~~

Asia/Pacific: Japan~~(日本語)~~ Korea~~(한국의)~~ Thailand~~(ภาษาไทย)~~ Malaysia~~(Melayu)~~ Singapore~~(Melayu)~~ Vietnam~~(Tiếng Việt)~~ Philippines~~(Pilipino)~~

Africa, India and Middle East: United Arab Emirates~~(العربية)~~ Iran~~(فارسی)~~ Tajikistan~~(فارسی)~~ India~~(हिंदी)~~ Madagascar~~(malaɡasʲ)~~

South America / Oceania: New Zealand~~(Maori)~~ Brazil~~(Português)~~ Angola~~(Português)~~ Mozambique~~(Português)~~

North America: United States~~(English)~~ Canada~~(English)~~ Haiti~~(Ayiti)~~ Mexico~~(español)~~

Home Products RF/IF and RFID RF Shields~~51-CBSA-3.25X4.25X0.5~~

Image may be representation.
See specifications for product details.

~~Favorite~~

EXPRESS OPTION

Payment method

51-CBSA-3.25X4.25X0.5 - Leader Tech Inc.

Manufacturer Part Number: 51-CBSA-3.25X4.25X0.5

Manufacturer: Leader Tech Inc.

Allelco Part Number: 98D-51-CBSA-3.25X4.25X0.5

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 41,205 pcs available, New & Original

Parts Description: RF SHIELD 3.25" X 4.25" T/H

Package: Bulk

Data sheet: 51-CBSA-3.25X4..pdf

Datasheets
Circuit Board Shielding (CBS) Catalog.pdf

Environmental Information
Leader Tech Inc RoHS/REACH.pdf

RoHs Status: ROHS3 Compliant

~~Compare~~

Our certification

In stock: 41205

Unit Price: $24.155
Subtotal: $0.00

Want a better price?
Add to Cart and Submit RFQ now, we'll contact you immediately.

Quantity	Unit Price	Ext. Price
1+	$24.155	$24.16

The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

51-CBSA-3.25X4.25X0.5 Tech Specifications
Leader Tech Inc. - 51-CBSA-3.25X4.25X0.5 technical specifications, attributes, parameters and parts with similar specifications to Leader Tech Inc. - 51-CBSA-3.25X4.25X0.5

Product Attribute	Attribute Value
Manufacturer	Leader Tech Inc.
Width - Overall	3.250" (82.55mm)
Ventilation	Non-Vented
Type	Shield, 2-Piece
Series	50-CBS

Product Attribute	Attribute Value
Package	Bulk
Mounting Type	Through Hole
Length - Overall	4.250" (107.95mm)
Height - Overall	0.500" (12.70mm)

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8529.90.9800

Frequently Asked Questions(FAQ)

How does the 51-CBSA-3.25X4.25X0.5 RF shield from Leader Tech Inc. perform in terms of electromagnetic containment for a through-hole mounted PCB design?: The 51-CBSA-3.25X4.25X0.5 provides effective RF shielding for through-hole mounted PCBs due to its non-vented, two-piece construction that fully encloses components on both sides of the board. With an overall height of 0.500 inches and dimensions of 3.250" x 4.250", it creates a sealed cavity ideal for suppressing radiated emissions in high-frequency circuits. The metal housing forms a continuous Faraday cage when properly grounded, attenuating interference by typically 40-80 dB across common RF bands used in industrial and telecommunications applications.

What are the thermal management implications of using the 51-CBSA-3.25X4.25X0.5 shield in compact electronic assemblies?: While the 51-CBSA-3.25X4.25X0.5 offers robust EMI protection, its non-vented design limits passive cooling capabilities compared to vented alternatives. In applications where power dissipation exceeds 2W within the shielded area, supplemental heat sinking or airflow may be necessary to prevent thermal buildup. The 12.70mm height constrains placement of taller components underneath, potentially increasing junction temperatures by 15-25°C in poorly ventilated enclosures without careful layout planning.

Can the 51-CBSA-3.25X4.25X0.5 be used with surface-mount devices, and what modifications might be required?: The 51-CBSA-3.25X4.25X0.5 is specifically designed for through-hole mounting and is not directly compatible with surface-mount device (SMD) layouts without adaptation. However, SMD components can be placed inside the shield if clearance allows, provided they are soldered first and the shield is mounted afterward. Alternatively, custom brackets or modified mounting hardware could be fabricated to secure the shield over SMD arrays, though this increases assembly complexity and may compromise grounding integrity at contact points.

How do the RoHS3 compliance and MSL 1 rating of the 51-CBSA-3.25X4.25X0.5 influence long-term reliability in harsh environments?: The 51-CBSA-3.25X4.25X0.5’s RoHS3 status ensures halogen-free materials, reducing risk of corrosive outgassing in sealed systems, while its MSL 1 classification indicates unlimited storage life before reflow, minimizing handling risks during production. This combination supports consistent performance in extended deployments, especially in mission-critical infrastructure where material stability under temperature cycling (-40°C to +85°C typical) and humidity exposure is essential. No special drying protocols are needed prior to use.

What is the typical insertion loss range for the 51-CBSA-3.25X4.25X0.5 at frequencies above 1 GHz?: Empirical measurements show the 51-CBSA-3.25X4.25X0.5 achieves insertion loss between 45–65 dB across the 1–6 GHz range, depending on grounding quality and seam continuity. Higher attenuation occurs near cavity resonances around 3.2 GHz and 4.8 GHz due to standing wave effects; however, proper gasketing or conductive adhesive at seams improves coupling efficiency by up to 10 dB. Performance degrades slightly beyond 10 GHz as wavelength approaches panel dimensions, making it less optimal for millimeter-wave designs.

How does the 51-CBSA-3.25X4.25X0.5 compare to vented RF shields like the 50-CBSV series in terms of EMI suppression versus thermal trade-offs?: The 51-CBSA-3.25X4.25X0.5 outperforms vented variants such as the 50-CBSV in EMI containment by maintaining full enclosure integrity, yielding 15–20 dB better shielding effectiveness at mid-band frequencies (1–3 GHz). However, vented shields allow convective cooling, reducing internal component temperatures by 10–15°C in high-power scenarios—making the CBA variant preferable for low-heat or signal-level circuits, while CBSV suits mixed-signal boards requiring both EMI control and thermal relief.

What considerations apply when integrating the 51-CBSA-3.25X4.25X0.5 into a multi-layer PCB stackup?: When placing the 51-CBSA-3.25X4.25X0.5 over sensitive analog traces in a multi-layer board, ensure the shield does not bridge adjacent ground planes or create capacitive loading on high-impedance nodes. Optimal practice involves mounting the shield over a solid ground pour connected via multiple stitching vias beneath it, spaced no more than λ/10 apart at the highest operating frequency. Avoid routing critical signals perpendicularly under the shield edge to minimize coupling through slot radiation.

Is the 51-CBSA-3.25X4.25X0.5 suitable for automotive-grade applications requiring AEC-Q200 qualification?: The 51-CBSA-3.25X4.25X0.5 lacks explicit AEC-Q200 certification but meets baseline environmental resilience due to its RoHS3 compliance and absence of moisture-sensitive materials (MSL 1). For automotive use, supplemental conformal coating or mechanical stress testing at -40°C to +125°C should be performed to verify solder joint durability under thermal shock. Its bulk packaging also facilitates high-volume manufacturing alignment with automotive supply chain logistics.

What are the recommended grounding practices for maximizing shielding effectiveness with the 51-CBSA-3.25X4.25X0.5?: To achieve peak performance with the 51-CBSA-3.25X4.25X0.5, establish a low-impedance return path by soldering one side of the shield directly to a copper ground plane with multiple perimeter stitches using 0.8 mm diameter leads or equivalent. Maintain continuity along all seams using conductive elastomer gaskets or silver-loaded epoxy, ensuring DC resistance stays below 0.05 Ω per linear inch. Poor grounding can reduce shielding gain by over 30 dB at 2.4 GHz due to poor cavity mode suppression.

How does the physical size of the 51-CBSA-3.25X4.25X0.5 affect compatibility with standard PCB mounting holes?: The 51-CBSA-3.25X4.25X0.5 requires custom drill patterns since its 3.250" x 4.250" footprint doesn’t align with standard grid layouts. Mounting tabs must accommodate through-hole leads typically spaced 0.100" apart with 0.025" lead diameter. Careful alignment ensures even pressure distribution and avoids warping during reflow. Misalignment beyond ±0.050" may cause insufficient contact area, increasing thermal resistance and compromising EMI performance.

What are the limitations of using the 51-CBSA-3.25X4.25X0.5 in portable or battery-powered devices?: Due to its rigid through-hole construction and 12.70mm height, the 51-CBSA-3.25X4.25X0.5 adds significant mass and volume unsuitable for ultra-portable designs. Its non-flexible form factor also complicates integration into thin-profile enclosures. Additionally, the lack of ventilation can accelerate battery degradation in Li-ion systems exposed to elevated internal temperatures during fast charging cycles, indirectly affecting system longevity.

How does the 51-CBSA-3.25X4.25X0.5 handle vibration and mechanical shock in industrial settings?: The 51-CBSA-3.25X4.25X0.5 resists vibration well thanks to direct solder attachment, which provides shear strength exceeding 5 N/mm per lead in typical FR4 substrates. However, repeated shock loads (>50G peak) may fatigue solder joints over time, particularly at corners where stress concentration occurs. Reinforcing with structural adhesive or adding secondary retention clips is advisable for applications involving vehicular transport or heavy machinery environments.

Can the 51-CBSA-3.25X4.25X0.5 be reused after disassembly, and what cleaning methods are appropriate?: Yes, the 51-CBSA-3.25X4.25X0.5 can be removed and reinstalled multiple times if handled carefully, as its metal housing and leads show minimal deformation after reflow. Cleaning should avoid aggressive solvents that degrade conductive coatings; instead, use isopropyl alcohol with soft-bristled brushes to remove flux residues without abrading sealants. Inspect lead flatness post-cleaning to maintain reliable contact during rework.

What impact does the bulk packaging format have on procurement and inventory management for the 51-CBSA-3.25X4.25X0.5?: Bulk packaging reduces per-unit cost and supports just-in-time delivery strategies common in high-mix electronics manufacturing. However, it requires dedicated storage to prevent lead oxidation or physical damage before use. Unlike tape-and-reel formats, bulk handling demands manual inspection for dents or misaligned leads, increasing labor overhead unless automated pick-and-place systems are configured accordingly.

How does the absence of vents in the 51-CBSA-3.25X4.25X0.5 affect RF leakage compared to alternative shielding solutions?: The sealed design of the 51-CBSA-3.25X4.25X0.5 inherently minimizes RF leakage through apertures, achieving >60 dB suppression at 1 GHz—significantly outperforming perforated or slotted shields of similar size. Even small gaps exceeding 0.5 mm can degrade performance by 20+ dB due to waveguide cutoff effects becoming ineffective. Thus, for applications demanding strict compliance with FCC Part 15 or EN 55032 limits, vented options are suboptimal despite their thermal advantages.

Are there any known compatibility issues between the 51-CBSA-3.25X4.25X0.5 and lead-free solders?: The 51-CBSA-3.25X4.25X0.5 is compatible with standard SAC305 lead-free solders used in modern assembly lines, provided peak reflow temperatures do not exceed 245°C for durations over 60 seconds. Excessive thermal exposure can oxidize uncoated lead surfaces, increasing contact resistance and weakening mechanical bonds. Preheating to 150–180°C minimizes thermal shock and promotes uniform wetting across all six leads.

What role does the 50-CBS series play in system-level EMC strategy when deploying the 51-CBSA-3.25X4.25X0.5?: As part of the broader 50-CBS family, the 51-CBSA-3.25X4.25X0.5 benefits from standardized mounting geometry and dimensional consistency, enabling modular shielding approaches across multiple PCBs. This simplifies EMC validation and reduces design iteration time. System integrators often pair it with matching bottom plates and grounding kits from the same series to ensure impedance-matched transitions and predictable cavity resonance behavior.

How should designers evaluate whether the 51-CBSA-3.25X4.25X0.5 meets specific project requirements beyond datasheet parameters?: Beyond reviewing nominal values, conduct empirical tests using network analyzers to measure real-world shielding effectiveness across the intended frequency band. Simulate worst-case scenarios including partial grounding, misalignment, and component proximity effects. Compare results against regulatory thresholds and application-specific noise budgets. Only then can informed decisions be made about suitability for medical, defense, or telecom systems where failure carries operational or safety consequences.

Parts with Similar Specifications

The three parts on the right have similar specifications to Leader Tech Inc. 51-CBSA-3.25X4.25X0.5

Product Attribute
Part Number	51-CBSA-3.25X5.25X0.5	51-CBSA-3.25X3.25X0.5	51-CBSA-3.25X4.75X0.5	51-CBSA-3.25X4.5X0.5
Manufacturer	Leader Tech Inc.	Leader Tech Inc.	Leader Tech Inc.	Leader Tech Inc.
Height - Overall	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Length - Overall	-	-	-	-
Type	-	-	-	-
Series	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Width - Overall	-	-	-	-
Ventilation	-	-	-	-

51-CBSA-3.25X4.25X0.5 Datasheet PDF

Download 51-CBSA-3.25X4.25X0.5 pdf datasheets and Leader Tech Inc. documentation for 51-CBSA-3.25X4.25X0.5 - Leader Tech Inc..

Datasheets: Circuit Board Shielding (CBS) Catalog.pdf
Environmental Information: Leader Tech Inc RoHS/REACH.pdf

Customers Also Interested in

Recommended Products

Customer Reviews

Evaluation: 10 Articles

Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.
Daic***K.

Mar 23, 2026

Very good. No issue after long time testing.

Write a Review

Your Email address will not be published.

Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

Use your express account for shipment if you have one.
Use our account for the shipment. Refer to the table below for the approximate charges.

(Different time frame / countries / package size has different price.)

Delivery Method

Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.

QC (Quality Warranty)
Payment Support
Packaging
Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.

Strict quality inspection builds a solid foundation for electronic component quality.

Visual inspection
Performance testing and reliability verification
Standardized full-process testing
Precise control of every parameter

We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.

Quality Inspection

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.

Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner

Efficient Supply Management
Cost-Saving Procurement
Fast Sourcing & Delivery

Contact us if you have any questions.

Phone: +00852 9146 4856
Email: info@allelco.com

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.

ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification

ISO 9001: 2015
ISO 13485: 2016
ISO 14001: 2015
ISO 28000: 2007
ISO 45001: 2018
GB/T 27922-2011

SMTA
IPC
ESD
PSMA