HE3621A1210
Reed Relay, SPST-NO, 12 VDC, HE3600 Series, Through Hole, 1 kohm, 500 mA
- Manufacturer: LITTELFUSE
- Product type: Reed Relays
- Contact Configuration:SPST-NO; Coil Voltage:12VDC; Product Range:HE3600 Series; Relay Mounting:Through Hole; Coil Resistance:1kohm; Switching Current Max:500mA; Switching Voltage Ma
- SVHC: Boric acid (14-Jun-2023)
- Coil Voltage: 12VDC
- Product Range: HE3600 Series
- Relay Mounting: Through Hole
- Coil Resistance: 1kohm
- Contact Configuration: SPST-NO
- Switching Current Max: 500mA
- Switching Voltage Max: 200V
| Delivery and price | |
|---|---|
| Units per pack | 100 |
| Price | 1.5 € |
| Current stock | 10+ |
| Lead time | 30 days |
**Reed Relays** SIL Packaged > HE3600 ## ~~-~~ HE3600 Miniature Single In ~~line Reed Relay~~ ## **Description** The HE3600 is a miniature reed relay in a SIL package with a normally open contacts capable of switching up to 200Vdc at 10W. It is available with 5V, 12V, and 24V coils and has external magnetic shield and diode suppressed coil options. ## **Features** - Miniature single in-line package - Optional coil suppression diode to protect coil drive circuits - RoHS Compliant - External magnetic shield option - Diode suppression option - Normally open contact version ## **Agency Approvals** |**Agency**|**Agency File Number**| |---|---| |Wks|E47258| ## **Benefits** - Sub-miniature size and single in line • Lower power coil consumption than configuration allows very high competing electromechanical packing densities, minimizing space devices and cost • Hermetically sealed switching - Hermetically sealed switching contact is immune to the effects of its environment - Transfer molded package gives maximum component protection Note: Contact Littelfuse for specific agency approval ratings. ## **Applications** ## **Dimensions** - Security Systems Dimensions in mm (inch) - Telecom Equipment - Process Control Systems **==> picture [312 x 160] intentionally omitted <==** **----- Start of picture text -----**<br> 19.70<br>(.776)<br>W<br>0.51<br>(0.020) H<br>PeU iu | as<br>0.51 NOM.<br>0.25 NOM.<br>(0.020) 3.00NOM. (.010)<br>(.118)<br>3 PITCHES OF<br>5.08 NOM.<br>T ART<br>(.200)<br>**----- End of picture text -----**<br> - Automatic Test Equipment - Instrumentation ## **Table 1: Dimension** |**Relay Type**|**Body Type**|**L**|**W**|**H**| |---|---|---|---|---| ||Transfer Molded|19.05 (.750)|5.08 (.200)|7.45 (.293)| |HE3600|External Shield|19.70 (.776)|5.65 (.222)|7.87 (.310)| © 2016 Littelfuse Revised: 03/04/16 Specifications are subject to change without notice. littelfuse.com **Reed Relays** SIL Packaged > HE3600 **==> picture [93 x 32] intentionally omitted <==** ## ~~-~~ HE3600 Miniature Single In ~~line Reed Relay~~ ## **Table 2: Electrical and Operating Characteristics @ 25°C** **==> picture [507 x 261] intentionally omitted <==** **----- Start of picture text -----**<br> Column Number 1<br>Form A<br>Contact Type SPST-NO<br>Standard<br>Relay Types HE3621A<br>Power, Switching Watt - max. 10<br>Voltage, Switching Vdc - max. 200<br>Contact Rating [1]<br>Current, Switching A - max. 0.5<br>Current, Carry A - max. 1.2<br>Across Open Contacts Vdc - min. 250<br>Voltage Hold-off [4] Contacts to Coil Vac - min. 1500<br>Between Isolated Terminals Vac - min. 1500<br>Contact, Initial Ω max. 0.150<br>Resistance [5] Insulation Across Open Contacts Ω min. 10 [10]<br>Insulation Between Isolated Terminals Ω min. 10 [10]<br>Operate Time ms - max. 1.0<br>Timing<br>Release Time ms - max. 1.0<br>Temperature, Operating °C -40 to +85<br>Temperature, Storage °C -40 to +105<br>Environmental<br>Vibration Resistance G - max. 10-2000 Hz. 20<br>Shock Resistance G - max. 11 ms ½ sine 50<br>**----- End of picture text -----**<br> ## **Table 3: Coil Characteristics @ 25°C** |**Contact**<br>**Form and Type**|**Electrical and**<br>**Operating**<br>**Characteristics**||**Dimensions**|**Part Number**|**Nominal**<br>**Coil Voltage**<br>**Vdc**<br>5|**Coil**<br>**Resistance**<br>**±10% Ohms**<br>500|**Must**<br>**Operate**<br>**Vdc**<br>3.75|**Must**<br>**Release**<br>**Vdc**<br>0.5|**Maximum**<br>**Coil Voltage**<br>**Vdc**<br>14|**Maximum**<br>**Coil Voltage**<br>**Vdc**<br>14||**Top View 2.54mm (0.1") Grid**<br>**Dot on Case: Pin 1**<br>**Numbers not printed on case.**|**Top View 2.54mm (0.1") Grid**<br>**Dot on Case: Pin 1**<br>**Numbers not printed on case.**|**Top View 2.54mm (0.1") Grid**<br>**Dot on Case: Pin 1**<br>**Numbers not printed on case.**|**Top View 2.54mm (0.1") Grid**<br>**Dot on Case: Pin 1**<br>**Numbers not printed on case.**|**Top View 2.54mm (0.1") Grid**<br>**Dot on Case: Pin 1**<br>**Numbers not printed on case.**|**Top View 2.54mm (0.1") Grid**<br>**Dot on Case: Pin 1**<br>**Numbers not printed on case.**|**Top View 2.54mm (0.1") Grid**<br>**Dot on Case: Pin 1**<br>**Numbers not printed on case.**|**Top View 2.54mm (0.1") Grid**<br>**Dot on Case: Pin 1**<br>**Numbers not printed on case.**|**Top View 2.54mm (0.1") Grid**<br>**Dot on Case: Pin 1**<br>**Numbers not printed on case.**|| |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| |1A<br>SPST-NO|See Table 2|See Table 1||HE3621|12|1000|8.0|1.0||22|||**1**<br>**2**<br>**+**|||**3**||**4**|||| ||||||24|2150|16.0|2.0||31|||||||||||| ||||||||||||||||||||||| © 2016 Littelfuse Revised: 03/04/16 Specifications are subject to change without notice. littelfuse.com **Reed Relays** SIL Packaged > HE3600 **==> picture [93 x 32] intentionally omitted <==** **==> picture [93 x 32] intentionally omitted <==** ## ~~-~~ HE3600 Miniature Single In ~~line Reed Relay~~ ## **HE3600 PCB LAYOUT (Bottom View)** ## **Part Numbering System** **==> picture [248 x 218] intentionally omitted <==** **----- Start of picture text -----**<br> HE3600 - X - XX - X<br>Model Number<br>HE3621 - Standard<br>Contact Type<br>A - Form A (SPST-NO)<br>Standard Coil<br>05 - 5 Volt<br>12 - 12 Volt<br>24 - 24 Volt<br>General Options<br>00 - No Options<br>10 - Diode Supressed Coil<br>40 - External Magnetic Shield<br>50 - Ext. Magnetic Shield and Diode<br>**----- End of picture text -----**<br> ||||Ø0.80|Ø0.80||||**E3600 **|**- X**|**- XX **|**- X**| |---|---|---|---|---|---|---|---|---|---|---|---| ||||(.032) HOLE||||||||| |5.08||TYP|||||||||| ||(.200)||10.16<br>(.400)||||**Model Number**<br>HE3621 - Standard||||| ||||||15.24<br>(.600)||**Contact Type**<br>A - Form A (SPST-NO)||||| ||||||||**Standard Coil**||||| ||||||||05 - 5 Volt||||| ||||||||12 - 12 Volt||||| ||||||||24 - 24 Volt||||| ||||||||**General Options**||||| ||||||||00 - No Options||||| ||||||||10 - Diode Supressed Coil||||| ||||||||40 - External Magnetic Shield||||| ||||||||50 - Ext. Magnetic Shield and Diode||||| ||||||||Note: Not all combinations of Part Number suffxes are available. Contact Littelfuse for details||||| |**Packaging**|||||||||||| |**Packaging**|**Option**||**Packaging Specification**||||**Quantity**<br>**Quantity & Packaging Code**|**Taping Width**|||| |Bulk||||Bulk|||1000/5000<br>N/A||N/A||| Note: Not all combinations of Part Number suffixes are available. Contact Littelfuse for details. © 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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