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SF2186E
RFMi
FILTER, SAW, 1268.52 MHZ, 6SMD
140530 Pcs New Original In Stock
1.26852GHz Frequency General Purpose RF SAW Filter (Surface Acoustic Wave) 1.7dB 38.3MHz Bandwidth 6-SMD, No Lead
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5.0 / 5.0
- (327 Ratings)
SF2186E
Product Overview
9217751
DiGi Electronics Part Number
SF2186E-DGManufacturer
RFMi
SF2186E
Description
FILTER, SAW, 1268.52 MHZ, 6SMDInventory
140530 Pcs New Original In Stock
1.26852GHz Frequency General Purpose RF SAW Filter (Surface Acoustic Wave) 1.7dB 38.3MHz Bandwidth 6-SMD, No Lead
Quantity
Minimum 1
Minimum 1
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SF2186E Technical Specifications
Category
SAW Filters
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Frequency - Center
1.26852GHz
Bandwidth
38.3MHz
Insertion Loss
1.7dB
Ratings
AEC-Q200
Applications
General Purpose
Mounting Type
Surface Mount
Package / Case
6-SMD, No Lead
Height (Max)
0.054" (1.38mm)
Size / Dimension
0.118" L x 0.118" W (3.00mm x 3.00mm)
Base Product Number
SF2186
Datasheet & Documents
Datasheets
Download SF2186E Product Specification (PDF)
HTML Datasheet
SF2186E-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
ECCN
EAR99
HTSUS
8541.60.0060
Additional Information
Other Names
2410-SF2186ETR2
2410-SF2186E
2410-SF2186ETR
Standard Package
1
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Une livraison très rapide avec un emballage recyclable, je suis très satisfait.
Dec 02, 2025
We are always confident in their capacity to supply and assist promptly, thanks to their excellent stock management and support team.
Dec 02, 2025
I commend their ability to manage large stock volumes without issues.
Dec 02, 2025
The item feels solid and well-made, clearly designed to last for a long time.
Dec 02, 2025
Excellent after-sales service that truly cares about customer happiness.
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Frequently Asked Questions (FAQ)
Can the SF2186E SAW filter be used as a drop-in replacement for the EPCOS B39162B4308P810 in a 1.27 GHz GPS L1 front-end design, and what layout or matching adjustments are needed?
The SF2186E is not a direct drop-in replacement for the EPCOS B39162B4308P810 due to differences in center frequency (1.26852 GHz vs. 1.57542 GHz), bandwidth (38.3 MHz vs. 28 MHz), and impedance characteristics. The SF2186E is optimized for narrowband applications around 1.268 GHz, such as certain IoT or industrial telemetry systems, not GPS L1. Attempting to substitute it would result in severe signal attenuation and out-of-band rejection failure. If your system operates near 1.268 GHz, the SF2186E may be suitable, but you must re-optimize the input/output matching network and verify performance with a network analyzer. Always validate with S-parameter simulations and prototype testing before full integration.
What are the key reliability risks when using the SF2186E in automotive environments, and how does its AEC-Q200 rating influence design-in decisions?
Although the SF2186E carries an AEC-Q200 rating—indicating qualification for passive components in automotive applications—it is critical to note that this certification applies only to environmental stress tests (e.g., temperature cycling, humidity), not full system-level EMC or functional safety compliance. The main reliability risk lies in long-term exposure to high vibration and thermal shock, which can affect solder joint integrity due to the 6-SMD no-lead package’s small footprint (3.00mm x 3.00mm). To mitigate this, use robust PCB pad designs with adequate solder fillets, avoid placing the SF2186E near board edges or high-stress zones, and consider underfill if operating in harsh under-hood environments. Always conduct HALT (Highly Accelerated Life Testing) specific to your use case.
How should I handle impedance matching and PCB layout for the SF2186E to minimize insertion loss and ensure stable performance across temperature variations?
The SF2186E has a typical insertion loss of 1.7 dB, but real-world performance can degrade if impedance mismatches occur due to poor layout. Maintain a 50 Ω transmission line from the antenna or LNA to the filter input, using controlled impedance routing with proper ground plane stitching. Avoid vias near the I/O pads and keep trace lengths symmetrical and as short as possible. The no-lead 6-SMD package requires precise solder paste stencil design (recommend 0.1 mm thickness) to prevent tombstoning. Additionally, since SAW filters exhibit temperature-dependent frequency drift (~±20 ppm/°C), ensure your system tolerates a potential ±250 kHz shift over -40°C to +85°C. Use grounded coplanar waveguide structures if operating above 1 GHz to reduce radiation loss.
Is the SF2186E suitable for coexistence with LTE Band 71 (617–698 MHz) or other sub-1 GHz radios on the same PCB, and what filtering precautions are necessary?
The SF2186E operates at 1.26852 GHz with a 38.3 MHz bandwidth, so it provides no meaningful rejection of sub-1 GHz signals like LTE Band 71. However, its high-Q SAW structure can be susceptible to intermodulation distortion or spurious responses if strong out-of-band blockers are present. If co-locating with sub-1 GHz transmitters, ensure sufficient spatial separation (>5 mm recommended) and use additional front-end filtering (e.g., a low-pass or band-pass pre-filter) to attenuate high-power harmonics that could overload the SF2186E’s input. Also, verify receiver sensitivity with conducted tests under simultaneous transmission conditions, as nonlinearities in nearby power amplifiers may generate intermodulation products that fall within the SF2186E’s passband.
What are the risks of substituting the SF2186E with a ceramic or LC filter in a cost-sensitive IoT module, and when is such a trade-off justified?
Replacing the SF2186E with a cheaper ceramic or discrete LC filter introduces significant performance trade-offs: reduced selectivity, higher insertion loss, and poor temperature stability. Ceramic filters typically offer wider bandwidth and lower Q, degrading adjacent-channel rejection—critical in dense RF environments. LC filters require tuning, occupy more board area, and suffer from component tolerance drift over temperature. This substitution may be justified only in ultra-low-cost, non-regulatory, short-range applications (e.g., proprietary 900 MHz ISM bands) where spectral purity is less critical. For standards-compliant designs (e.g., FCC/CE), the SF2186E’s sharp roll-off and stable center frequency ensure reliable operation. Always simulate end-to-end link budget and conduct EMC pre-compliance testing before committing to a lower-performance alternative.
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.
SF2186E CAD Models
RFMi SF2186E PCB symbols & footprints
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