The Keysight (Agilent) 44471A is a 10-channel, 1-wire general-purpose relay module designed for use with the 3488A Switch/Control Unit. It features independent SPST latching relays capable of switching up to 250 V, 2 A, and up to 60 W (DC) or 125 VA (AC) per channel. The module includes built-in screw terminal connections and custom terminal pads for adding relay protection networks, making it ideal for DUT power control, external relay actuation, or signal routing.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Screw terminal block |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered via mainframe backplane |
| Operating Temperature | 0 °C to 55 °C |
Topology and Configuration
| Parameter | Value |
|---|---|
| Switch Type | Non-latching Relay |
| Number of Channels | 10 |
| Configuration Topology | 10 independent channels |
| Contact Form | SPST (Single Pole Single Throw) |
| Compatible Mainframes | Agilent HP 3488A Switch/Control Unit |
| Protection Networks | Provisions on-board to add simple RC protection circuits |
Physical and Connection Interface
| Parameter | Value |
|---|---|
| Connector Type | Screw terminal block |
DC Electrical Specifications
| Parameter | Value |
|---|---|
| Maximum Switching Voltage (DC) | 250 V |
| Maximum Switching Current | 2 A |
| Maximum Carry Current | 2 A |
| Maximum Switching Power (per channel, DC) | 60 W |
| Initial Closed Channel Resistance | < 1 Ω |
| Thermal EMF / Offset Voltage | < 4 µV per channel |
AC and RF Electrical Specifications
| Parameter | Value |
|---|---|
| Maximum Switching Voltage (AC) | 250 V |
| Maximum Switching Power (per channel, AC) | 125 VA |
Timing and Switching Dynamics
| Parameter | Value |
|---|---|
| Maximum Scan Rate | 43 channels/sec |
Relay Life and Reliability
| Parameter | Value |
|---|---|
| Mechanical Lifetime (No-Load) | 10^8 cycles |
AC Performance
| Parameter | Value |
|---|---|
| -3 dB Bandwidth | 10 MHz (into 50 Ω) |
| Crosstalk (at 100 kHz) | <-80 dB (into 50 Ω) |
| Crosstalk (at 1 MHz) | <-60 dB (into 50 Ω) |
| Isolation (at 100 kHz) | <-80 dB (into 50 Ω) |
| Isolation (at 1 MHz) | <-60 dB (into 50 Ω) |
Reliability
| Parameter | Value |
|---|---|
| Electrical Lifetime | 10^5 operations (at rated load) |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to +75 °C |
| Operating Humidity | Up to 95% R.H. at 40 °C |
Performance
| Parameter | Value |
|---|---|
| Relay Settling Time | < 20 ms |
| Relay Mechanism | Non-latching |
| DC Isolation Resistance | > 10^10 Ω (at 25 °C, < 40% R.H.) |
| Maximum Terminal-to-Chassis Voltage | 250 V AC rms / 250 V DC |
Inputs & Outputs
| Parameter | Value |
|---|---|
| Terminal Connection | Detachable screw terminal block |
Technology
Electromechanical Latching Relay
Applications
Independent signal switching, DUT power control, attenuator configuration, relay actuation