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FSF-5050 440–446MHz IF SAW Filters, 5×5mm UHF IF

8-SMD, 5.0x5.0

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SAW Filters

FEATURE

FCom Fuji Crystal FSF-5050 440–446 MHz IF SAW filter series covering 440/441/442/446 MHz center frequencies. 5.0×5.0mm SMD package, 50Ω design for UHF IF chains, private networks, industrial RF modules and narrowband wireless receivers.

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Datasheet

Product Description

FSF-5050-440M~446M IF SAW Filter Series

A focused collection of 5.0×5.0mm SMD SAW filters for 440–446 MHz UHF IF selectivity. Built on a 50Ω interface to deliver dependable insertion loss, solid out-of-band rejection and consistent manufacturing performance for narrowband wireless receivers.

Designed for UHF IF chains in private networks, industrial RF modules and professional receiver front ends where channel selectivity and repeatable production performance matter. For program-level optimization, ask for the exact bandwidth/temperature grade that matches your IF plan.

Center Frequencies: 440 / 441 / 442 / 446 MHz Package: 5.0×5.0 mm SMD System Impedance: 50Ω RoHS / Lead Free

Request RFQ / Quote SAW Filter Knowledge Hub

FSF-5050-440M~446M IF SAW filter series, 5×5mm, 50Ω — White background hero for clean product viewing. Actual marking and pin definition follow the shipped revision.

Positioning & Key Design Highlights

The FSF-5050-440M~446M series is part of FCom Fuji Crystal’s UHF IF SAW portfolio, designed to support 440–446 MHz channel selection needs across private networks and industrial narrowband receivers. The 5×5mm footprint helps simplify high-density RF/IF layouts while maintaining stable performance.

Compact 5.0×5.0mm SMD for space-sensitive IF designs.
Typical insertion loss around 1.4–2.3 dB (model-dependent).
Multiple bandwidth and temperature grades for civilian and industrial use.
50Ω source/load design for straightforward system integration.

Typical Applications

UHF private radio / two-way systems
Industrial telemetry, control and data links
Wireless audio and auxiliary communication terminals
Multi-stage receivers requiring narrow IF selectivity

If you need a tailored passband, specific skirt requirements or adjacent center frequencies, we can evaluate customized SAW designs based on your system targets.

Target Systems & Typical IF Placement

Target Systems

UHF private networks and narrowband terminals
Professional wireless receiver IF stages and multi-IF architectures
Industrial RF modules and telemetry/data-link receivers
Receiver chains in test/measurement IF subsystems

If your program references regional channel plans or internal standards, share the blocker scenario and adjacent-channel constraints during RFQ to align skirts and ripple.

Typical IF Placement

In most superheterodyne receivers, an IF SAW filter is placed after the mixer (or first IF amplifier) to provide channel selectivity before high-gain stages and demodulation. Maintaining a controlled 50Ω environment around the filter helps preserve the intended passband shape and rejection.

Keep the filter close to the IF amplifier/mixer, control ground return, and avoid long stubs that can introduce impedance discontinuities.

Key Specs (Snapshot)

Quick reference summary for common frequency points in this collection. Typical values are measured under reference conditions (50Ω source/load, nominal supply chain test setup, typically at room temperature unless otherwise specified). Final shipping specifications follow the latest confirmed FCom documentation.

Series Summary

FSF-5050 440–446MHz IF SAW

Center frequencies: 440 / 441 / 442 / 446 MHz
Package: 5.0×5.0mm SMD (8-pad)
System design impedance: 50Ω
Use case: UHF IF selectivity for narrowband receivers

Supply & Programs

Samples, Volume, Custom

Samples for evaluation (subject to availability)
Volume production for qualified builds
Custom center frequency/BW/skirt/temperature options (feasibility review)

Available Center Frequencies & Detailed Specifications

FCom Part Number	Center Freq. (MHz)	Insertion Loss (dB)	Bandwidth Indicator	Recommended Temp. Grade	Notes
FSF-5050-440M	440	Typ. 1.4 / Max. 2.8	3 dB BW: Min. 19 / Typ. 23.3 MHz	-40 to +85°C	Common UHF IF reference point
FSF-5050-441M	441	ILmin Typ. 1.5 / Max. 2.8	2 dB BW: Min. 15–19 / Typ. 22.3 MHz	0 to +50°C or -40 to +85°C	Flexible options for bandwidth/temperature planning
FSF-5050-442M	442	Typ. 1.5 / Max. 3.0	1 dB BW: Min. 16 / Typ. 20 MHz	-40/-55 to +85°C	Suitable for harsher outdoor environments
FSF-5050-446M	446	(Fc ±4MHz) Typ. 2.3 / Max. 4.5	Amplitude ripple: Typ. 0.3 / Max. 2.5 dB	Project-dependent	Targeted channel selectivity around 446 MHz

Matching / Impedance

Integrating into a 50Ω IF Chain

Keep impedance continuity across microstrip/stripline transitions.
Verify return loss when paired with high-gain IF amplifiers.
Use minimal L/C trimming only if board-level results call for it.

Reliability

Temperature Planning & Production Consistency

Choose extended temperature grades for outdoor/industrial terminals.
Validate drift and skirt performance during EVT/DVT.
We can support batch trend data to help tighten your design margin.

Ordering Code / Options

Standard Frequency Points

FSF-5050-440M
FSF-5050-441M
FSF-5050-442M
FSF-5050-446M

Common Program Options

Temperature grade selection (standard vs extended)
Bandwidth / ripple alignment to channel plan
Skirt / out-of-band rejection targets (system-driven)
Documentation support (program-dependent)

Selection Path / Upgrade Options

Use the path below to converge quickly from “frequency plan” to “qualified part number,” then expand to adjacent IF points if your architecture changes.

Lock IF plan and center frequency (440/441/442/446MHz)
Confirm required passband BW/ripple and blocker scenario
Pick temperature grade for the end environment
Validate on board (impedance, return loss, skirts) and finalize BOM

Nearby UHF IF collections for upgrade paths: 433–435MHz, 458.5MHz, 460–465MHz, 470–475MHz.

Documents & Downloads

FSF-5050 IF SAW filter package outline, 5.0×5.0mm

Package outline (reference). Confirm pad definition and marking per datasheet revision.

Datasheets

Contact / RFQ

Certifications: ISO9001 View, ISO14001 View.

FAQ

Which center frequencies are covered by this series?

This collection centers on 440, 441, 442 and 446 MHz for common UHF IF channel plans. Adjacent frequencies and tailored bandwidth targets can be evaluated for custom requirements.

What applications are these filters designed for?

They are well suited to UHF private networks, two-way radios, industrial telemetry/control, wireless audio links and multi-stage receivers requiring stable narrowband IF selectivity.

Do I need an extra matching network?

Most designs can integrate these parts directly in a 50Ω IF chain. For unusual board environments or amplifier interfaces, small L/C adjustments based on measurement results can further improve passband and rejection performance.

How do I choose between 440/441/442/446 MHz?

Align your choice with your IF architecture and channel plan, then confirm bandwidth and temperature needs. Extended-temperature options are recommended for outdoor and high-reliability terminals.

Is there a public price list? What is the MOQ?

There is no fixed public price list for all configurations. MOQ and pricing depend on part number, temperature grade, and program requirements. Please send your target spec and quantity for a formal RFQ.

Can I get samples and what is the typical lead time?

Samples are available for evaluation subject to part availability. Lead time varies by model and order quantity; contact us with the exact part number and demand plan to confirm the current schedule.

Can you customize bandwidth, skirts or temperature grade?

Yes. Custom center frequency, bandwidth, skirt targets and temperature options can be evaluated. Provide your IF plan, required BW/ripple, blocker scenario and mechanical constraints for feasibility review.

Do you provide test reports or compliance documentation?

On request, we can support shipment documentation and inspection information appropriate to your program (such as lot traceability and key electrical checks per datasheet conditions). Please specify what you need during RFQ.

Need a More Precise UHF IF Filtering Solution?

FCom Fuji Crystal supports additional FSF-5050 IF frequency points and customization for skirt targets, group delay control and package variants to help you refine your receiver design.

Contact / RFQ More SAW Applications

Technical support: sales and AEs can help confirm IF placement, matching approach and validation flow (VNA/receiver tests) to reduce integration risk.

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