HF3 56 TE Connectivity Relay or Contactor (Other) In Stock
TE Connectivity HF3 56 is a high-frequency SPDT RF relay with a 50 Ω impedance, 140 mW RF power handling, and a 12 V coil voltage, designed for signal routing in microwave and RF switching applications. Its monostable configuration and low insertion loss make it suitable for test instrumentation and wireless system front-ends. Available through global distributors with standard lead times for volume procurement.
- Manufacturer
- TE Connectivity
- Package
- Other
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- HF3 56 Datasheet PDF
- Category
- Relay or Contactor
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- SPDT monostable RF relay with 50 Ω characteristic impedance ensures minimal signal reflection in RF signal path switching at microwave frequencies
- 140 mW RF power handling at 12 V coil drive supports moderate-power signal routing in test equipment and wireless infrastructure switching matrices
- High-frequency design optimized for low insertion loss and high isolation, making it suitable for antenna switching, signal routing, and automated RF test applications
Applications
The HF3 56 RF relay is used in automated RF test systems, spectrum analyzers, and signal generator switching matrices where the 50 Ω SPDT configuration routes microwave signals with low insertion loss and high port isolation. It is also deployed in wireless base station receive paths, software-defined radio front-ends, and antenna diversity switching circuits that require reliable electromechanical RF signal routing. The 12 V coil voltage and 140 mW power rating make it compatible with standard lab instrument control voltages and moderate RF signal levels.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What are the coil voltage, RF power handling, and impedance specifications of the HF3 56 relay?
The TE Connectivity HF3 56 operates with a 12 V coil voltage, handles up to 140 mW of RF power, and presents a 50 Ω characteristic impedance across its signal ports. These specifications make it suitable for moderate-power RF switching in test instrumentation and wireless front-end applications.
Is HF3 56 monostable or bistable, and how does this affect power consumption in switching applications?
The HF3 56 is a monostable (latching-off) relay, meaning it requires continuous 12 V coil energization to maintain the switched state. This draws coil current continuously during the held position, which is a design consideration for battery-powered RF switching systems where power budget is critical. Bistable alternatives would suit sleep-mode scenarios with 0 mW standby draw.
Which RF test and measurement applications commonly use the TE Connectivity HF3 56?
Automated test equipment (ATE) signal routing matrices, VNA switching networks, and spectrum analyzer input multiplexers commonly use the HF3 56 because its 50 Ω impedance and SPDT topology allow clean signal path selection across RF frequency bands, with 140 mW power handling sufficient for typical instrument output levels of +20 dBm or lower.
How does the 50 Ω impedance of HF3 56 affect its integration into RF PCB designs?
Matching the 50 Ω relay impedance to standard RF transmission line widths on FR4 (typically 2.9 mm to 3.2 mm for 50 Ω microstrip at 1.6 mm board thickness) minimizes reflections and VSWR at the relay ports, ensuring signal integrity from DC up to the relay's rated frequency range without additional impedance matching networks.
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Why Buy from FindMyChip
About TE Connectivity
TE Connectivity is a leading electronic component manufacturer. FindMyChip sources TE Connectivity ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
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