Agilent/Keysight 44477A
Agilent / Keysight VXI Modules. Voltage: 250 V DC, Current: 2 A per channel, Channel: 60 W.
- Model
- Agilent / Keysight 44477A
- Calibration
- Available on request
- Price
- $1,250
- Status
- In stock
- RFQ ref
- 44477A
This unit
The Agilent/Keysight 44477A is a VXI plug-in relay module providing seven independent SPDT (Form-C) relays for signal and power switching in automated test systems. It switches up to 2 A at 250 V DC, with maximum per-channel capacity of 60 W or 125 VA, and per-module capacity of 420 W or 875 VA. The module uses armature latching relays to maintain state, with contact resistance below 1 Ohm and thermal offset below 3 µV.
Scan rate reaches 43 channels/second, enabling fast sequential switching operations. The 44477A accommodates dual power configurations: external supplies up to 250 V DC or an internal 5 V DC supply. This flexibility suits applications requiring control of RF, coaxial, microwave components, and mercury relays.
Initial contact resistance below 1 Ohm minimizes signal loss and heat generation. The module integrates directly into Agilent/Keysight VXI mainframes such as the 3499A/B/C series, providing centralized switching control within larger measurement systems.
Technical Specifications
- Relay Type: 7 × SPDT Form-C relays
- Maximum Switching Voltage: 250 V DC
- Maximum Switching Current: 2 A per channel
- Maximum Power per Channel: 60 W, 125 VA
- Maximum Power per Module: 420 W, 875 VA
- Initial Closed Channel Resistance: < 1 Ohm
- Thermal Offset: < 3 µV
- Maximum Scan Rate: 43 channels/second
- Switching Mechanism: Armature latching relay
- Power Supply Options: External (up to 250 V DC) or internal 5 V DC
Key Features
- Armature latching design maintains relay state without continuous power
- Low contact resistance minimizes signal degradation
- Low thermal offset supports precision measurement applications
- High scan rate enables rapid multi-channel switching sequences
- Dual power supply configuration accommodates diverse system architectures
Typical Applications
- RF and microwave device switching
- Coaxial circuit control
- Mercury relay actuation via external power
- Automated test equipment signal routing
- Remote device drive and control
Compatibility & Integration
- VXIbus interface for plug-in integration
- Compatible with Agilent/Keysight VXI mainframes including 3499A/B/C series
- Form factor: VXI plug-in module
- Shipping weight: Approximately 3 lbs
Agilent / Keysight 44477A — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Agilent / Keysight 44477A. Calibration covers all module-specific parameters per manufacturer datasheet, output accuracy and linearity, frequency accuracy, and VXI register and trigger bus compliance. All calibrations ship with a NIST-traceable certificate. Turnaround is typically 1–3 business days after receipt.
Common Agilent / Keysight 44477A faults: relay contact wear, DAC/ADC drift, VXI backplane connector oxidation. Common faults include relay contact wear, DAC or ADC gain drift, and VXI backplane edge connector oxidation. Most modules are repaired at the component level with full post-repair verification in a C-size or D-size mainframe.
Agilent / Keysight 44477A price
This Agilent / Keysight 44477A is listed at $1,250. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Agilent / Keysight 44477A calibration cost
NIST-traceable calibration for the Agilent / Keysight 44477A is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Calibration for this instrument covers all module-specific parameters per manufacturer datasheet, output accuracy and linearity, frequency accuracy, and VXI register and trigger bus compliance. Turnaround is 1 to 3 business days after receipt. See full calibration details →
