HE722A0500 LITTELFUSE Relay or Contactor (Other) In Stock
Littelfuse HE722A0500 is a DPST-NO reed relay with a 5 Vdc coil, 200 Ω coil resistance, and 500 mA switching current capacity rated up to 200 Vdc. It features 125 mW coil power consumption in a compact 19.05 mm × 7.22 mm body. Available in stock with worldwide shipping.
- Manufacturer
- LITTELFUSE
- Package
- Other
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- HE722A0500 Datasheet PDF
- Category
- Relay or Contactor
- Price
- From $2.0000(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of HE722A0500?
- 5 Vdc nominal coil voltage with 200 Ω resistance drawing only 25 mA for low-power control circuit compatibility
- 500 mA maximum switching current at up to 200 Vdc enabling versatile signal and low-voltage power switching
- DPST-NO contact configuration providing 2 independent normally-open switching channels in a single package
- Compact 19.05 mm × 7.22 mm × 5.5 mm body ideal for board-level integration in test equipment
- 125 mW coil power and 0.5 Vdc release voltage ensuring fast, reliable operation across automated test systems
What is HE722A0500 used for?
The HE722A0500 reed relay is commonly deployed in automated test equipment (ATE), medical diagnostic instruments, and data acquisition systems where low-power, high-isolation signal switching at up to 200 Vdc and 500 mA is required. Its DPST-NO configuration enables simultaneous switching of 2 signal paths, simplifying multiplexer designs. The relay also suits telecommunications switching matrices and security alarm panels requiring fast, bounce-free switching with minimal coil power consumption of 125 mW.
What are the specifications of HE722A0500?
| YTEOL | 0 |
| Body Breadth | 7.22mm |
| Body Height | 5.5mm |
| Body Length or Diameter | 19.05mm |
| Coil Current(DC)-Max | 0.025A |
| Coil Operate Voltage(DC) | 3.75V |
| Coil Power | 125mW |
| Coil Release Voltage(DC) | 0.5V |
| Coil Resistance | 200Ω |
| Coil Voltage(DC)-Max | 12V |
| Coil Voltage-Nom | 5V |
| Coil/Input Supply Type | DC |
| Contact (AC) Max Rating R Load | 0.35A@140VAC |
| Contact Current(AC)-Max | 0.35A |
| Contact Current(DC)-Max | 0.5A |
| Contact (DC) Max Power Rating R Load | 10W@200VDC |
| Contact (DC) Max Rating R Load | 0.5A@200VDC |
| Contact Resistance | 150mΩ |
| Contact Voltage(AC)-Max | 140V |
| Contact Voltage(DC)-Max | 200V |
| Contact/Output Supply Type | AC/DC |
| Input Switching Control Type | Random |
| Insulation Resistance | 10000000000Ω |
| Mounting Feature | THROUGH HOLE-STRAIGHT |
| Operate Time | 1ms |
| Packing Method | BULK |
| Reference Standard | CUL; UL |
| Relay Action | MOMENTARY |
| Relay Form | 2 FORM A |
| Relay Function | DPST |
| Relay Type | DRY REED RELAY |
| Release Time | 1ms |
| Sealing | HERMETICALLY SEALED |
| Surface Mount | NO |
| Terminal Length | 0.002999745999491999inch |
| Termination Type | SOLDER |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8536.49.00.50 |
Where can I find the HE722A0500 datasheet?
HE722A0500 Datasheet DownloadOfficial datasheet from LITTELFUSE
What are equivalent replacements for HE722A0500?
Compatible alternatives and drop-in replacements for HE722A0500:
Frequently Asked Questions
What coil voltage and contact switching ratings does the HE722A0500 support?
The HE722A0500 operates with a 5 Vdc nominal coil voltage (3.75 V operate, 0.5 V release) and a 200 Ω coil resistance drawing 25 mA at rated voltage. The DPST-NO contacts handle up to 500 mA switching current at a maximum of 200 Vdc, covering both signal-level and low-voltage power switching in ATE and instrumentation designs.
How does the DPST-NO contact configuration of HE722A0500 benefit multi-channel switching designs?
The DPST-NO (double-pole single-throw normally-open) configuration provides 2 independent normally-open switching channels that close simultaneously when the 5 Vdc coil is energized. This allows engineers to switch 2 signal paths or differential lines with a single relay, reducing component count and simplifying PCB routing in multiplexed measurement systems handling signals up to 200 Vdc.
What is the physical size of HE722A0500 and how does it fit on a standard PCB?
The HE722A0500 measures 19.05 mm in length, 7.22 mm in breadth, and 5.5 mm in height. Its through-hole or SIL-style footprint occupies a moderate PCB area, and the 19 mm body length requires sufficient clearance in relay grid layouts. Engineers designing ATE cards typically allocate a 20 mm × 8 mm keepout zone per relay to accommodate the body and lead spacing.
Can the HE722A0500 coil be driven from a 3.3 V microcontroller output or does it need a driver circuit?
The HE722A0500 has a coil operate voltage of 3.75 Vdc minimum, so a 3.3 V GPIO output is marginally below the guaranteed pull-in threshold. A 5 V supply with a simple NPN transistor driver (e.g., 2N2222 with 1 kΩ base resistor) is the recommended approach, since the coil draws 25 mA at 5 V — well within standard transistor saturation capabilities — while a flyback diode across the 200 Ω coil protects the driver from inductive kickback.
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Why Buy from FindMyChip
About LITTELFUSE
LITTELFUSE is a leading electronic component manufacturer. FindMyChip sources LITTELFUSE ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
More from LITTELFUSE
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $3.0800 | $3.08 |
| 100+ | $2.3100 | $231.00 |
| 1000+ | $2.0000 | $2000.00 |
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