Littelfuse Power & Signal Relays 90

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Part	Manufacturer	Relay Type	Mounting Feature	Relay Action	Relay Function	Coil or Input Supply Type	Reference Standard	Dielectric Strength Between Open Contacts	Relay Form	Operate Time	Maximum Contact DC Power Rating (R Load)	Release Time	Insulation Resistance	Coil Power (mW)	Packing Method	Body Length/Diameter	Body Width	Coil Resistance	Sealing	No. of Terminals	Physical Dimension	Body Height	Dielectric Strength Between Coil & Contacts	Maximum Contact DC Rating (R Load)	Maximum Operating Temperature	Maximum DC Coil Current	Minimum Operating Temperature	DC Coil Release Voltage	Maximum DC Contact Current	Termination Type	Nominal Coil Voltage	DC Coil Operate Voltage	Manufacturer Series	Contact Resistance	Input Switching Control Type	PCB Hole Count	Maximum DC Contact Voltage	Additional Features	Terminal Length	Maximum DC Coil Voltage	Contact or Output Supply Type
HE3621A0510	Littelfuse	Power/Signal Relay	Through Hole-Straight Mount	Momentary	SPST	DC	UL	250 Vrms	1 Form A	1 ms	10W@200VDC	1 ms	10 GΩ	50 mW		0.75 in (19.05 mm)	5.08 in (129.032 mm)	500 Ω	Hermetically Sealed	6	0.75 x 0.2 x 0.3 in (19.05 x 5.08 x 7.62 mm)	0.3 in (7.62 mm)	1.5 kVrms	0.5A@200VDC	85 °C (185 °F)	10 mA	-40 °C (-40 °F)	500 mV	500 mA	Solder	5 V	3.75 V		150 mΩ	Random	6	200 V	With Coil Suppressed Diode	0.1181 in (3 mm)	14 V	DC
HE3321A0400	Littelfuse	Power/Signal Relay	Through Hole-Straight Mount	Momentary	SPST	DC	CUL; UL		1 Form A	1 ms	10W@200VDC	1 ms	10 GΩ	50 mW		0.95 in (24.13 mm)	7 in (177.8 mm)	500 Ω	Hermetically Sealed	4	0.95 x 0.276 x 0.291 in (24.13 x 7 x 7.4 mm)	0.291 in (7.4 mm)		0.5A@200VDC	85 °C (185 °F)	10 mA	-40 °C (-40 °F)	500 mV	500 mA	Solder	5 V	3.75 V		150 mΩ	Random	4	200 V		0.1181 in (3 mm)	5 V	DC
HE3321A2400	Littelfuse	Power/Signal Relay	Through Hole-Straight Mount	Momentary	SPST	DC			1 Form A	1 ms	10W@200VDC	1 ms	10 GΩ	288 mW		0.95 in (24.13 mm)	7.62 in (193.548 mm)	2 kΩ	Hermetically Sealed	4	0.95 x 0.3 x 0.335 in (24.13 x 7.62 x 8.51 mm)	0.335 in (8.51 mm)	2.5 kVrms	0.5A@200VDC	85 °C (185 °F)	12 mA	-40 °C (-40 °F)	2 V	500 mA	Solder	24 V	18 V		150 mΩ	Random	4	200 V		0.1181 in (3 mm)	24 V	DC
HE3321A1200	Littelfuse	Power/Signal Relay	Through Hole-Straight Mount	Momentary	SPST	DC			1 Form A	1 ms	10W@200VDC	1 ms	10 GΩ	288 mW		0.95 in (24.13 mm)	7.62 in (193.548 mm)	500 Ω	Hermetically Sealed	4	0.95 x 0.3 x 0.335 in (24.13 x 7.62 x 8.51 mm)	0.335 in (8.51 mm)	2.5 kVrms	0.5A@200VDC	85 °C (185 °F)	24 mA	-40 °C (-40 °F)	1 V	500 mA	Solder	12 V	9 V		150 mΩ	Random	4	200 V		0.1181 in (3 mm)	12 V	DC
90380	Littelfuse	Power/Signal Relay
HE3321C1200	Littelfuse	Power/Signal Relay	Through Hole-Straight Mount	Momentary	SPDT	DC				3 ms		3 ms		288 mW		0.95 in (24.13 mm)	7.62 in (193.548 mm)	500 Ω	Hermetically Sealed		0.95 x 0.3 x 0.335 in (24.13 x 7.62 x 8.51 mm)	0.335 in (8.51 mm)		0.25A@175VDC	85 °C (185 °F)	24 mA	-40 °C (-40 °F)	1 V	250 mA	Solder		9 V					175 V			12 V	DC
HE3321A0500	Littelfuse	Power/Signal Relay	Through Hole-Straight Mount	Momentary	SPST	DC			1 Form A	1 ms	10W@200VDC	1 ms	10 GΩ	50 mW		0.95 in (24.13 mm)	7.62 in (193.548 mm)	500 Ω	Hermetically Sealed	4	0.95 x 0.3 x 0.335 in (24.13 x 7.62 x 8.51 mm)	0.335 in (8.51 mm)	2.5 kVrms	0.5A@200VDC	85 °C (185 °F)	10 mA	-40 °C (-40 °F)	500 mV	500 mA	Solder	5 V	3.75 V		150 mΩ	Random	4	200 V		0.1181 in (3 mm)	5 V	DC
HE3321A1240	Littelfuse	Power/Signal Relay																															HE3321
02040701TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											30 A							020407							12 V
02040707Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											30 A							020407							12 V	DC
HE3351A0500	Littelfuse	Power/Signal Relay	Through Hole-Straight Mount	Momentary	SPST	DC				1 ms		1 ms		200 mW		0.95 in (24.13 mm)	7.62 in (193.548 mm)	125 Ω	Hermetically Sealed		0.95 x 0.3 x 0.335 in (24.13 x 7.62 x 8.51 mm)	0.335 in (8.51 mm)		0.5A@300VDC	85 °C (185 °F)	40 mA	-20 °C (-4 °F)	500 mV	500 mA	Solder		3.75 V					300 V			5 V	DC
02040602TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											10 A							020406							24 V	DC
02040716TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											40 A							020407							12 V	DC
02040607Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											20 A							020406							12 V	DC
HE3321C1240	Littelfuse	Power/Signal Relay																															HE3321
02040603Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											20 A							020406							12 V
02040504Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											40 A							020405							24 V	DC
02040605TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											25 A							020406							12 V	DC
02040610TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											10 A							020406							24 V	DC
02040702Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											20 A							020407							24 V	DC
02040612TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											15 A							020406							24 V	DC
02040708TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											20 A							020407							24 V	DC
HE3321C2440	Littelfuse	Power/Signal Relay																															HE3321
02040607TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											20 A							020406							12 V	DC
02040711Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											30 A							020407							12 V	DC
02040705Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											30 A							020407							12 V	DC
02040706TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											20 A							020407							24 V	DC
02040715TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											40 A							020407							12 V	DC
02040503Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											50 A							020405							24 V	DC
02040704Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											20 A							020407							24 V	DC
02040501Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											70 A							020405							12 V	DC
02040609Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											25 A							020406							12 V	DC
02040601TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											25 A							020406							12 V	DC
02040709TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											30 A							020407							12 V	DC
02040705TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											30 A							020407							12 V	DC
02040605Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											25 A							020406							12 V	DC
02040608Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											15 A							020406							24 V	DC
02040712Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											20 A														24 V
02040504TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											40 A							020405							24 V
02040604Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											15 A							020406							24 V	DC
02040711TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											30 A							020407							12 V	DC
02040708Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											20 A							020407							24 V	DC
02040505TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											30 A							020405							24 V	DC
02040704TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPDT	DC									Bulk											20 A							020407							24 V	DC
02040710TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											20 A							020407							24 V	DC
02040606TXN	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											10 A							020406							24 V	DC
HE3351A2440	Littelfuse	Power/Signal Relay																															HE3351
02040610Z	Littelfuse	Power/Signal Relay	Panel Mount	Momentary	SPST	DC									Bulk											10 A							020406							24 V	DC

Power & Signal Relays

Power and signal relays are electromechanical switches that are used to control power circuits and signal circuits respectively. Power relays are designed to handle higher voltages and currents, typically in the range of several hundred volts and amperes. They are commonly used in industrial and automotive applications to switch on/off motors, heaters, lights, and other high-power loads. Signal relays, on the other hand, are designed to handle lower voltages and currents, typically in the range of several volts and milliamperes. They are commonly used in electronic equipment such as computers, telecommunications equipment, and consumer electronics to switch on/off signals, data, and low-power loads.

Power and signal relays come in different types and configurations depending on the specific application requirements. Some common types include electromechanical relays, reed relays, solid-state relays, and latching relays. Electromechanical relays use a mechanical switching mechanism, typically a set of contacts that move to make or break an electrical circuit. Reed relays use a set of magnetically activated contacts that are enclosed in a sealed glass tube. Solid-state relays use a semiconductor device to switch on/off the load. Latching relays use a magnetic field to hold the contacts in either the open or closed position, eliminating the need for continuous power to maintain the relay's state.

Power and signal relays play a critical role in the overall performance and reliability of electrical and electronic systems. The selection of the appropriate relay for a given application is crucial to ensure proper operation, safety, and longevity of the system. Factors to consider when selecting a relay include the load current and voltage, switching frequency, contact rating, switching speed, contact bounce, and environmental conditions such as temperature, humidity, and vibration. Proper maintenance and testing of relays are also important to ensure their continued performance and reliability over time.