YQM3838F

SAW Filters | SMD 3838 Ceramic SMD SAW Bandpass Filter

Core Advantages

• High Power Headroom: Larger cavity space vs. 3030 package, higher RF power tolerance for high-power TX paths without saturation or distortion.
• Superior Anti-Interference: High out-of-band rejection effectively blocks WiFi, 2.4GHz spurious signals, improving receiver sensitivity in harsh electromagnetic environments.
• Flexible Multi-Pin Options: Available in 6-Pin universal and 8-Pin differential I/O versions, directly compatible with both single-ended and differential circuit designs.
• Multi-Grade Selection: Three product tiers — Consumer, Industrial, Automotive — covering everything from commercial to in-vehicle harsh-condition applications in one stop.

Product Introduction

The SMD3838 is a 3.8×3.8mm ceramic SMD SAW bandpass filter, available in mainstream 6-Pin and 8-Pin pin configurations. Frequency coverage spans 300MHz to 2500MHz, with primary frequencies at 315 / 433.92 / 868 / 915 / 1575MHz. Features standard 50Ω impedance and full SMT reflow solder compatibility. The larger cavity compared to 3030 packages delivers greater power headroom and stronger anti-interference performance.

Alternative Products and Reasons

• Qualcomm (USA) — B39 Series: B39431B3790Z810, B39311B3768Z810 and other 8-Pin SMD 3838 package models.
• TST / TAISAW (Taiwan) — TA/TZ Series: TA0381A, TB0316A, TB0205A and other 8-Pin SMD 3838 package models.
• EPSON (Japan) — FS Series: FS-335 (automotive-grade 3838 flagship).
• Abracon LLC (USA) — AFS434S3-T, AFS869S3-T, 6-SMD 3838 package models.

PIN-TO-PIN Compatible: Dimensions, pin layout, and PCB pad footprint are fully identical to imported original parts. Customers can drop-in SMD replacement without any PCB redesign.

Key Features

• Package Dimensions: 3.8×3.8×1.4~1.6mm, 6-Pin / 8-Pin SMD, tape-and-reel mass production, standard PCB pad layout.
• Electrical Performance: Insertion loss 2.2~3.8dB, passband ripple ≤1.8dB, out-of-band rejection 40~60dB, bandwidth options of 6 / 10 / 15 / 20MHz with custom support.
• Frequency Range: 300MHz~2500MHz, full coverage of ISM, GNSS, Sub-GHz communication bands.
• Temperature Stability: Consumer grade -20°C~+70°C; Industrial / Automotive grade -40°C~+125°C, temperature drift ≤6ppm/°C.
• Power Advantage: Larger cavity with higher input power tolerance than 3030 package; stronger ESD and surge immunity.
• Environmental Compliance: RoHS, REACH compliant; automotive-grade models certified to AEC-Q200; standard 50Ω input/output, no external matching circuit required.

Applications

• Automotive Electronics: Automotive RKE remote keys, TPMS tire pressure TX/RX, in-vehicle GPS/BeiDou navigation modules, smart window RF, vehicle anti-theft systems (315/433MHz).
• Industrial IoT & Wireless Telemetry: Industrial wireless data modules, LoRa gateways, smart utility metering (water/gas/electricity), downhole industrial RF, outdoor sensors (868/915MHz EU/US ISM).
• Security & Remote Control: High-power garage door remotes, industrial roller shutter controllers, building access control, IR alarm host RF receiver front-ends.
• Satellite Navigation & Positioning: GPS/BeiDou modules, RTK surveying receivers, drone navigation modules (1575.42MHz L1).
• Short-Range Communications: High-power Bluetooth modules, data radios, compact private-network two-way radio RF filtering.

Certifications

RoHS, REACH compliant; automotive-grade models AEC-Q200 certified.

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