FSR-5050 SMD SAW Resonator (5.0×5.0 mm)

Q: How do I download the FSR-5050 datasheet?

Click the Download Datasheet button on this page to open the official PDF. If you need a customized type, email FCom@fujicrystal.com with your target frequency and tolerance.

FSR-5050 is a compact SAW resonator designed for high transmit/receive sensitivity and robust environmental resistance (high-temperature resistance and impact resistance). It supports 154–1000 MHz and common sub-GHz ISM frequencies such as 315 MHz, 433.92 MHz, 868 MHz, and 915 MHz. Learn more about SAW Resonator.

154–1000 MHz 5.0×5.0×1.5 mm SMD Standard: 315 / 330 / 370 / 433.92 / 868 / 915 MHz Tolerance @25°C: ±50 / ±75 / ±150 kHz Insertion loss (min): 1.0–1.5 dB −40 to +85°C operation RoHS compatible

Request Quote / Sample Download Datasheet View Specs

Email: FCom@fujicrystal.com (share target frequency, tolerance, and operating temperature range).

FSR-5050 5.0×5.0mm SMD SAW resonator product image

Key Features

Compact 5050 footprint: 5.0×5.0×1.5 mm SMD package for RF modules and industrial wireless.
High transmit and receive sensitivity for stable wireless link performance.
Environmental resistance, including high-temperature resistance and impact resistance.
Wide frequency coverage: 154–1000 MHz with standard ISM-band options.
Flexible tolerance: ±50/±75/±150 kHz at 25°C (or specify).
Low insertion loss (min): 1.0/1.3/1.4/1.5 dB (or specify).
RoHS compatible.

Frequency Range

154–1000 MHz

Package

5.0×5.0×1.5 mm

Common ISM Frequencies

315 / 433.92 / 868 / 915 MHz

Operating Temp

−40 to +85°C

Recommended Applications

Sub-GHz ISM-band RF modules (315 / 433.92 / 868 / 915 MHz)
Automotive RKE (remote keyless entry), remote control Tx/Rx
TPMS and short-range sensor links
Security alarms, access control, telemetry and industrial wireless

Note: final performance depends on matching, PCB layout, and grounding quality around the resonator.

Electrical Specifications

The table below summarizes the FSR-5050 series. For special requirements, contact FCom Fuji Crystal.

Item	Minimum	Typical	Maximum	Unit
Frequency Range (f)	154		1000	MHz
Standard Frequency		315, 330, 370, 433.92, 868, 915		MHz
Frequency Tolerance @25°C (Δf)		±50 / ±75 / ±150, or specify		kHz
Insertion Loss (min) (IL)		1.0 / 1.3 / 1.4 / 1.5, or specify		dB
Turnover Temperature (T0)		25 / 40 / 55		°C
Frequency Temperature Coefficient (FTC)		0.032		ppm/°C
Frequency Aging (first year, \|fA\|)			≤10	ppm/yr
DC Insulation Resistance (any two pins)	1			MΩ
Operating Temperature Range	−40		+85	°C
Storage Temperature Range	−55		+125	°C

Tip: Keep RF traces short, use a continuous RF ground reference, and isolate the resonator from noisy digital nets to minimize parasitics and maintain stability.

Datasheet: Download FSR-5050 PDF

Package & Pinout

Item	Details
Package Size	5.0×5.0×1.5 mm (SMD)
Pin Assignment	Pin 2: Input/Output Pin 6: Output/Input Pins 1, 3, 5, 7: To be grounded Pins 4, 8: Case Ground
Layout Guidance	Use a continuous RF ground reference. Stitch ground pins with multiple vias close to the pads. Keep RF routing short and avoid stubs. Treat case-ground pins as low-impedance ground connections.

Note: Pin 2 and Pin 6 are bidirectional depending on circuit topology. Pins 4 and 8 connect to the metal case and should be tied to a solid RF ground plane.

Design Recommendations

Ground strategy: connect pins 1, 3, 5, 7 to RF ground and add multiple vias around the device for low inductance.
Case ground: tie pins 4 and 8 (case ground) to the same low-impedance ground reference as the RF return path.
Short RF interconnect: minimize trace length between the resonator and RF IC/network; avoid dangling stubs.
EMI isolation: keep away from high-speed clocks and switching regulators; maintain clean reference ground.
Thermal robustness: confirm tolerance target across temperature for your end system (−40 to +85°C).
Custom options: if you need a special frequency/tolerance, share target MHz and kHz requirement via email.

For custom frequency or tighter tolerance, contact: FCom@fujicrystal.com

FAQ

Which standard frequencies are available for FSR-5050?

FSR-5050 covers 154–1000 MHz. Standard frequencies include 315, 330, 370, 433.92, 868, and 915 MHz. Custom frequencies can be specified.

What tolerance options are supported at 25°C?

Typical options are ±50 kHz, ±75 kHz, and ±150 kHz at 25°C. You can also specify a custom tolerance based on frequency and application.

How do I download the datasheet?

Click the Download Datasheet button to open the official PDF. If you need a customized type, email FCom@fujicrystal.com with your target frequency and tolerance.