HE3321A0400
Reed Relay, SPST-NO, 5 VDC, HE3300 Series, Through Hole, 500 ohm, 500 mA
- Manufacturer: LITTELFUSE
- Product type: Reed Relays
- Contact Configuration:SPST-NO; Coil Voltage:5VDC; Product Range:HE3300 Series; Relay Mounting:Through Hole; Coil Resistance:500ohm; Switching Current Max:500mA; Switching Voltage
- SVHC: No SVHC (17-Dec-2014)
- Coil Voltage: 5VDC
- Product Range: HE3300 Series
- Relay Mounting: Through Hole
- Coil Resistance: 500ohm
- Contact Configuration: SPST-NO
- Switching Current Max: 500mA
- Switching Voltage Max: 200VDC
| Delivery and price | |
|---|---|
| Units per pack | 100 |
| Price | 1.11 € |
| Current stock | 10+ |
| Lead time | 30 days |
**Reed Relays** SIL Packaged > HE3300 ## ~~-~~ HE3300 Miniature Single In ~~line Reed Relay~~ ## **Description** The HE3300 is a miniature reed relay in a SIL package with a choice of normally open, normally open high voltage or changeover contacts capable of switching up to 300Vdc at 10W. It is available with 5V, 12V, and 24V coils and has external magnetic shield options. ## **Features** - Miniature single in-line package - External magnetic shield option - High voltage switching version - Normally open and change over contact configurations available ## **Agency Approvals** |**Agency**|**Agency File Number**| |---|---| ||| ||E47258| ## **Benefits** - Single in-line configuration allows high packing densities, minimizing space and cost - Hermetically sealed switching contact is immune to its environment - Lower power coil consumption than • Transfer molded package gives competing electromechanical maximum component protection devices Note: Contact Littelfuse for specific agency approval ratings. ## **Applications** - Security Systems - Automatic Test Equipments ## **Dimensions** - Instrumentation - Telecom Equipments - Process Control Systems **==> picture [471 x 146] intentionally omitted <==** **----- Start of picture text -----**<br> Dimensions in mm (inch) Process Control Systems<br>24.13 24.90<br>W<br>(.950) (.980)<br>0.51 3.00 NOM. 0.51<br>(0.020) (.118) (0.020) 3.00 NOM.(.118) H<br>H a sal Ge<br>0.51 NOM . 0.51 NOM .<br>10.16 NOM. 10.16 NOM.<br>(0.020) (0.020)<br>(.400) (.400) 2.54 NOM. 0.25 NOM.<br>re 20.32 NOM. 20.32 NOM. (.100) (.010)<br>(.800) (.800)<br>Fig. 1: HE3321A, HE3351A Fig. 2: HE3321C Fig. 3: HE3300 (All)<br>**----- End of picture text -----**<br> ## **Table 1: Dimension** |**Relay Type**|**Body Type**|**L**|**W**|**H**| |---|---|---|---|---| ||Transfer Molded|24.13 (.950)|7.00 (.276)|7.40 (.291)| |HE3300|External Shield|24.90 (.980)|7.60 (.299)|7.80 (.307)| © 2016 Littelfuse Revised: 03/04/16 Specifications are subject to change without notice. littelfuse.com **Reed Relays** SIL Packaged > HE3300 **==> picture [93 x 32] intentionally omitted <==** ## ~~-~~ HE3300 Miniature Single In ~~line Reed Relay~~ ## **Table 2: Electrical and Operating Characteristics @ 25°C** **==> picture [506 x 248] intentionally omitted <==** **----- Start of picture text -----**<br> Column Number 1 2 3<br>Form A Form A Form C<br>Contact Type SPST-NO SPST-NO SPST-CO<br>Standard High Voltage Standard<br>Relay Types HE3321A HE3351A HE3321C<br>Power, Switching Watt - max. 10 10 5<br>Voltage, Switching Vdc - max. 200 300 175<br>Contact Rating [1]<br>Current, Switching A - max. 0.5 0.5 0.25<br>Current, Carry A - max. 1.2 1.5 1.5<br>Across Open Contacts Vdc - min. 250 450 200<br>Voltage Hold-off [4]<br>Contacts to Coil Vac - min. 2500 2500 2500<br>Contact, Initial Ω max. 0.150 0.150 0.200<br>Resistance [5] Insulation Across Open Contacts Ω min. 10 [10] 10 [10] 10 [10]<br>Insulation Between Isolated Terminals Ω min. 10 [10] 10 [10] 10 [10 ]<br>Operate Time ms - max. 1.0 1.0 3.0<br>Timing<br>Release Time ms - max. 1.0 1.0 3.0<br>Temperature, Operating °C -40 to +85 -20 to +85 -40 to +85<br>Temperature, Storage °C -40 to +105 -40 to +105 -40 to +105<br>Environmental<br>Vibration Resistance G - max. 10-2000 Hz. 20 20 20<br>Shock Resistance G - max. 11 ms ½ sine 50 50 50<br>**----- End of picture text -----**<br> **Table 3: Coil Characteristics @ 25°C** **==> picture [505 x 222] intentionally omitted <==** **----- Start of picture text -----**<br> Contact Electrical and Nominal Coil Must Must Maximum Top View 2.54mm (0.1") Grid<br>Operating Dimensions Part Number Coil Voltage Resistance Operate Release Coil Voltage Dot on Case: Pin 1<br>Form and Type Characteristics Vdc ±10% Ohms Vdc Vdc Vdc Numbers not printed on case.<br>HE3321A0400 5 500 3.75 0.5 22 1 2 3 4<br>1A See Table 2 See<br>HE3321A1200 12 500 9.0 1.0 22<br>SPST-NO Column 1 Figure 1<br>HE3321A2400 24 2000 18.0 2.0 44<br>HE3321C0500 5 125 3.75 0.5 11 1 2 3 5 4<br>1C See Table 2 See<br>HE3321C1200 12 500 9.0 1.0 22<br>SPDT-CO Column 3 Figure 2<br>HE3321C2400 24 2000 18.0 2.0 44<br>HE3351A0500 5 125 3.75 0.5 11 1 2 3 4<br>1A<br>See Table 2 See<br>SPST-NO HE3351A1200 12 500 9.0 1.0 22<br>Column 2 Figure 1<br>High Voltage<br>HE3351A2400 24 2000 18.0 2.0 44<br>**----- End of picture text -----**<br> © 2016 Littelfuse Revised: 03/04/16 Specifications are subject to change without notice. littelfuse.com **Reed Relays** SIL Packaged > HE3300 **==> picture [93 x 32] intentionally omitted <==** **==> picture [93 x 32] intentionally omitted <==** ## ~~-~~ HE3300 Miniature Single In ~~line Reed Relay~~ ## **HE3300 PCB LAYOUT (Bottom View)** ## **Part Numbering System** **==> picture [238 x 212] intentionally omitted <==** **----- Start of picture text -----**<br> HE33XX - X - XX - XX<br>Model Number<br>HE3321 - Standard<br>HE3351 - High Voltage<br>Contact Type<br>A - Form A (SPST-NO)<br>C - Form C (SPDT-CO)<br>Standard Coil<br>04 - 5 Volt<br>12 - 12 Volt<br>24 - 24 Volt<br>General Options<br>00 - No Options<br>40 - External Magnetic Shield<br>**----- End of picture text -----**<br> |**HE3321A**|**HE3321A**|**HE3321A**|**HE3321A**||||||**HE3**|**3XX**|**- X**|**- XX**|**- XX**| |---|---|---|---|---|---|---|---|---|---|---|---|---|---| |**HE3351A**||||||**HE3321C**|||||||| |0.80 HOLE Ø(.032)|||||||||||||| ||||||||||**Model Number**||||| |5.08 TYP (.200)|||||||||HE3321 - Standard<br>HE3351 - High Voltage||||| |10.16 (.400)||20.32 (.800)|||||||**Contact Type**<br>A - Form A (SPST-NO)||||| ||||||||||C - Form C (SPDT-CO)||||| |||||||2.54 (.100)|||**Standard Coil**||||| ||||||||||04 - 5 Volt||||| ||||||||||12 - 12 Volt||||| ||||||||||24 - 24 Volt||||| ||||||||||**General Options**||||| ||||||||||00 - No Options||||| ||||||||||40 - External Magnetic Shield||||| ||||||||||Note: Not all combinations of Part Number suffixes are available.||||| ||||||||||Contact Littelfuse for details.||||| |**Packaging**|||||||||||||| |**Packaging**|**Option**|||**Packaging Specification**||||**Quantity**|**Quantity & Packaging Code**||**Taping Width**||| |Bulk||||||Bulk||500|N/A|||N/A|| © 2016 Littelfuse Revised: 03/04/16 Specifications are subject to change without notice. littelfuse.com
Updated at June 5, 2026
Founded in 1927 and headquartered in Chicago, Illinois, Littelfuse is a premier global manufacturer of circuit protection, power control, and sensing technologies. Widely recognized for pioneering the first small, fast-acting protective fuse, the company has grown into an industry leader whose highly reliable components are essential to modern industrial, transportation, and consumer electronics applications worldwide. At the core of the Littelfuse portfolio is an expansive and industry-leading range of circuit protection solutions. This encompasses a massive selection of traditional fuses, fuse holders, and resettable PTC thermistor fuses designed to safely interrupt overcurrent conditions. To defend against electrical overstress, Littelfuse also provides advanced transient voltage suppression (TVS) technologies, including thousands of specialized TVS diodes, TVS varistors, and gas discharge tubes (GDTs) that ensure robust defense against voltage spikes and environmental hazards. Beyond its foundational protection components, Littelfuse manufactures a diverse array of discrete semiconductors, sensors, and switching devices. Engineers rely on their high-performance thyristors, including TRIACs and SCRs, alongside power-efficient Schottky diodes and MOSFETs for demanding power control applications. Complemented by precision proximity sensors and highly reliable reed and solid-state relays, Littelfuse delivers the critical building blocks required for secure, efficient, and complete system design.
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