Solid State Relays Specifications

Performance


	Input Voltage Type
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	AC		The relay uses an AC input voltage.
	DC		The relay uses a DC input voltage.
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	Input (Pick-up) Voltage Range		This is the range of voltages that, when applied across the input terminals, maintain an "on" condition across the output terminal. This parameter is also used to define the absolute limits of input voltage that relays can withstand without damage. Input voltage range is known as must-operate, pick-up, or turn-on voltage.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Dropout Voltage		The dropout voltage is the voltage applied to the input at or below which the output is guaranteed to be in the off state. Dropout voltage is also known as the must-release or turn-off voltage. It is considered to be the "noise immunity" level of the relay.
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	Input Current Range		This is the range of input currents over which relays are designed to operate.
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	Output Voltage Type
	Your choices are...
	AC		The relay can be operated with an AC source output voltage.
	DC		The relay can be operated with a DC source output voltage.
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	Maximum Current		This is the maximum continuous current allowable across the relay output terminals under the specified heat dissipation and ambient temperature conditions. Generally, AC current is specified in RMS units. Maximum current is also known as the maximum switching voltage range, or the maximum switching current.
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	Load Voltage		This is the output supply voltage range in which the relay normally operates. Generally, AC voltage is specified in RMS units. Load voltage is also known as the maximum switching voltage range, and/or as line voltage.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Turn-on Switching
	Your choices are...
	Instant ON		Devices immediately turn-on the load when the pickup voltage is present. Instant-on is used to control inductive loads.
	Peak Switching		Peak switching turns-on the load when the control voltage is present and the voltage is at the peak. It is used to control heavy-duty inductive loads.
	Random Turn-on		Random turn-on is important particularly for inductive loads (transformers, etc.).
	Zero Switching		Devices switch at the point where the AC load voltage or current passes through zero as it changes polarity. Zero switching is used to control resistive loads.
	Other		Other unlisted or proprietary turn-on switching methods.
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Additional Specs


	Output Device
	Your choices are...
	MOSFET		Metal-oxide field-effect transistors (MOSFET) have an insulating layer between the gate electrode. This channel is a metal-oxide layer.
	Bipolar Transistor (BJT)		Bipolar junction transistors (BJT) are three-terminal devices in which the base current controls the emitter-to-collector current.
	SCR		Silicone controlled rectifiers (SCR) are three-terminal devices that act as a gated diode. The gate terminal is used to turn-on the device, allowing current to pass from cathode to anode.
	Triac		Triacs are bi-directional, gate-controlled thyristors. They are similar to SCRs, but can conduct in both directions. Triacs provide full-wave control of AC power.
	Other		Other unlisted output devices.
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	Switch Configuration
	Your choices are...
	Form A		Form A is SPST-NO.
	Form B		Form B is SPST-NC.
	Form C		Form C is SPDT-CO.
	Other		Other unlisted switch configurations.
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	Features
	Your choices are...
	Analog Switching		Devices have a built-in synchronizing circuit that controls the amount of output voltage as a function of the input voltage. Analog switching is used for resistive loads in closed loop applications.
	Built-in Heat Sink		The relay has an embedded heat sink for thermal protection.
	Internal Snubber		Applying an above-rating voltage at the output side could destroy the relay or cause it to malfunction. The snubber circuit absorbs and suppresses impulse noise.
	Over-current Protection		The relay has an integrated over-current protection circuit.
	Over-voltage Protection		The relay has an integrated over-voltage protection circuit. The relay's load-power supplies require adequate protection against over-voltage errors from various causes.
	Reverse Protection		Reverse protection is used to safeguard DC input relays from damage. If the polarity is reversed accidentally and the voltage does not exceed the rated value, the relay will not be damaged.
	TTL Compatible		The relay can accept or produce transistor-transistor logic (TTL), or compatible TTL signals.
	Visual Indicator		The relay has visual indicator such as a light-emitting diode (LED).
	Other		Other unlisted or proprietary features.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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