SMA25 series coaxial fixed attenuator covers frequency from DC to 26.5GHz and features low VSWR, flatness attenuation value and excellent capacity in anti-pulse and anti-burnout etc..
Coaxial fixed attenuators are used in absorbing energy of transmission line, expanding power range and controlling power level, they are also used in accurately measuring power or spectrum of RF microwave transmitters accompany with small power meter, comprehensive tester or spectrum analyzer.
Wide frequency range up to 26.5 GHz
25 W average power and 0.5 kW peak power
Low VSWR and flatness attenuation
50 ohm nominal impedance
Custom designs available for other special attenuation value & accuracy
| SMA25-XX-8 | • Frequency range: DC – 8 GHz • Max. VSWR: 1.20 • Attenuation value: 10, 20, 30, 40 dB (refer to XX) • Accuracy: ±0.4dB for 10 attenuation, ±0.5dB for 20/30/40 attenuation |
| SMA25-XX-12.4 | • Frequency range: DC – 12.4 GHz • Max. VSWR: 1.25 • Attenuation value: 10, 20, 30, 40 dB (refer to XX) • Accuracy: ±0.5dB for 10 attenuation, ±0.8dB for 20/30/40 attenuation |
| SMA25-XX-18 | • Frequency range: DC – 18 GHz • Max. VSWR: 1.30 • Attenuation value: 10, 20, 30, 40 dB (refer to XX) • Accuracy: ±1.0dB |
| SMA25-XX-26.5 | • Frequency range: DC – 26.5 GHz • Max. VSWR: 1.35 • Attenuation value: 10, 20, 30, 40 dB (refer to XX) • Accuracy: ±1.2dB |
| Average Power | 25W average to 25°C ambient temperature, derated linearly to 2.5W @ 125°C |
| Peak Power | 0.5 kW (5μs pulse width with 5% duty cycle) |
| Connector Type | • DC – 8/12.4 GHz: SMA (J,K), 50 ohm • DC – 18/26.5 GHz: SMA, 2.92mm, 50 ohm |
| Connectors | Brass nickel plated |
| Pin | Male: brass gold plated Female: beryllium copper gold plated |
| Housing | Aluminum, Black Anodize |
| Dimension | Ø63 × 47 mm |
| Weight | 115 g |
| Temperature Range | -55°C to +125°C |
| RoHS Complient | Yes |
| Module No. | Item | Description |
| SMA25-XX-8 | Coaxial Fixed Attenuator | DC to 8 GHz, XX refers to the attenuation value which is 10,20,30,40 |
| SMA25-XX-12.4 | Coaxial Fixed Attenuator | DC to 12.4 GHz, XX refers to the attenuation value which is 10,20,30,40 |
| SMA25-XX-18 | Coaxial Fixed Attenuator | DC to 18 GHz, XX refers to the attenuation value which is 10,20,30,40 |
| SMA25-XX-26.5 | Coaxial Fixed Attenuator | DC to 26.5 GHz, XX refers to the attenuation value which is 10,20,30,40 |
