Switch Cards for Switching Matrices

Product Specifications

Technical details and manufacturing context for Switch Cards

Definition

Switch cards are modular electronic components used within signal switching matrices. They provide the physical interface and control circuitry for routing electrical signals between multiple input and output channels. Each card contains switching elements, signal conditioning circuits, and control logic to establish and manage signal paths. The cards are typically built on FR-4 PCB substrates with copper traces and populated with relays, integrated circuits, resistors, and capacitors. They are available in configurations supporting 4 to 128 channels, with maximum switching voltages from 100 to 250 V AC/DC and currents from 0.5 to 5 A. Contact resistance is specified at ≤50 mΩ, insertion loss at ≤0.5 dB at 1 GHz, and isolation at ≥60 dB at 1 GHz. Operating temperature ranges from -40 to 85 °C, storage from -55 to 125 °C, and relative humidity from 5% to 95% non-condensing. The logic supply voltage is 5 V DC ±5%, with power consumption up to 10 W depending on channel count. Dimensions follow the Eurocard form factor, ranging from 100×160 mm to 233×160 mm, and weight varies from 100 to 500 g. Connector types include SMA and BNC for RF or general-purpose use. These cards are designed to receive control signals from the matrix controller, which activates specific switching elements (typically relays or solid-state switches) to connect input channels to output channels. They provide isolation, impedance matching, and signal integrity maintenance while routing signals. When selecting a switch card, verify the required number of channels, voltage and current ratings, contact resistance, insertion loss, isolation, temperature range, humidity limits, supply voltage, power consumption, dimensions, weight, and connector type against your application. Always confirm model-specific values and standards with the legal manufacturer or supplier, as the figures listed are reference ranges for the product category.

Working Principle

Switch cards operate by receiving control signals from the matrix controller to activate specific switching elements (typically relays or solid-state switches) that connect input channels to output channels. They provide isolation, impedance matching, and signal integrity maintenance while routing signals through the matrix. The control logic on the card decodes commands and drives the appropriate switches, ensuring that only the desired paths are established. The cards also include signal conditioning circuits to maintain signal quality, and they are designed to handle specified voltage and current levels while minimizing contact resistance and insertion loss.

Common Materials

FR-4 PCB substrate, Copper traces, Electronic components (relays, ICs, resistors, capacitors)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Number of Channels	4–128	Determines matrix size
Maximum Switching Voltage	100–250 V AC/DC	Higher voltage requires proper clearance
Maximum Switching Current	0.5–5 A	Affects contact rating
Contact Resistance	≤50 mΩ	Lower is better for signal integrity
Insertion Loss	≤0.5 dB	At 1 GHz
Isolation	≥60 dB	At 1 GHz
Operating Temperature	-40–85 °C	Extended range available
Storage Temperature	-55–125 °C	Non-operating
Relative Humidity	5–95 %	Non-condensing
Supply Voltage	5 ±5% V DC	Logic supply
Power Consumption	≤10 W	Depends on channel count
Dimensions	100×160–233×160 mm	Eurocard form factor
Weight	100–500 g	Varies with configuration
Connector Type	SMA–BNC	RF or general purpose

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Switching Elements
Electromechanical or solid-state devices that physically open/close signal paths

Material: Various (reed relays, electromechanical relays, solid-state switches)
Control Interface
Receives and processes commands from matrix controller

Material: Integrated circuits, connectors
Signal Conditioning Circuitry
Maintains signal integrity through buffering, amplification, or filtering

Material: Operational amplifiers, resistors, capacitors
PCB
Provides physical mounting and electrical connections for all components

Material: FR-4 with copper traces

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Switch Cards.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Signal Switching Matrix

View system integration details

Manufacturers of Switch Cards

Manufacturer profiles associated with Switch Cards.

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Frequently Asked Questions

What are switch cards used for?

Switch cards are used in signal switching matrices to route electrical signals between multiple input and output channels. They are commonly found in test and measurement systems, data acquisition, and communication equipment.

What are the typical channel counts available?

Switch cards are available with channel counts ranging from 4 to 128, depending on the model. The number of channels determines the size of the matrix that can be configured.

What is the maximum switching voltage and current?

The maximum switching voltage is 100 to 250 V AC/DC, and the maximum switching current is 0.5 to 5 A. These values affect the contact rating and must be matched to the application requirements.

How do I verify the performance of a switch card?

Check the contact resistance (≤50 mΩ), insertion loss (≤0.5 dB at 1 GHz), and isolation (≥60 dB at 1 GHz) specifications. Also verify operating temperature, humidity, and supply voltage. Always confirm with the manufacturer for the specific model.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Atmospheric to 1 atm sealed
other spec:	Signal frequency range: DC to 10 GHz, Power supply: 3.3V/5V DC ±5%
temperature:	-40°C to +85°C

Switch Cards

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards