1. Product Identification & Overview

️· Product: SAW (Surface Acoustic Wave) Filter
️· Manufacturer: EPCOS AG
️· Model: B9004
️· Central Frequency: 881.5 MHz
️· Application: Designed for mobile communication (GSM networks) - specifically mentioned GSM850, GSM900, GSM1800, GSM1900.
️· Document Type: Data Sheet

2. Key Specifications & Ratings

️· Operating Temperature Range: -30°C to +85°C (one version listed) and -10°C to +80°C (another version)
️· Storage Temperature Range: -40°C to +85°C
️· DC Voltage: 5V
️· ESD Rating: 100V (machine) / 250V (human body)
️· Input Power: 15 dBm (peak power of GSM signal)

3. Performance Characteristics (Two versions of datasheet specs are provided)

️· Insertion Loss (αmax): 1.9dB (version 1, -30 to +85C) and 1.9dB (version 2, -10 to +80C). The 2nd datasheet mentions a maximum of 2.3dB, with a footnote mentioning 2.5dB at certain temperatures.
️· Amplitude Ripple (∆α): 0.6dB
️· Input VSWR: 1.7
️· Output VSWR: 1.7
️· Common Mode Suppression (Ssc12): 25dB
️· Attenuation (α): Ranges are provided for different frequency bands (0 MHz to 12750 MHz).
️· Impedance: Source impedance of 50 Ohms, Load Impedance of 150 Ohms

4. Important Notes & Conditions

️· The datasheet presents *two* different versions of the specification table, indicating potential variations in performance or operating ranges of the SAW filter.
️· A footnote highlights that the maximum insertion loss can increase to 2.5 dB under specific temperature conditions (+80°C to +85°C).
️· The provided data sheet mentions transfer functions (narrowband and wideband) but doesn't provide detailed characteristics for those.

5. Legal & Contact Information

️· Standard purchase order conditions apply (ZVEI guidelines).
️· Contact EPCOS AG for technical questions, pricing, and availability.
️· A warning about potential hazardous substances is included, requiring contacting EPCOS for more information.