Littelfuse-HE3321A1200

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  

• External magnetic shield option  

• Miniature single in-line package  

• High voltage switching version  

• Normally open and change over  

contact configurations available  

Benefits  

• Single in-line configuration allows  

high packing densities, minimizing  

space and cost  

Agency Approvals  

• Hermetically sealed switching  

contact is immune to its  

environment  

Agency  

Agency File Number  

• Lower power coil consumption than  

competing electromechanical  

devices  

• Transfer molded package gives  

maximum component protection  

E47258  

Note: Contact Littelfuse for specific agency approval ratings.  

Applications  

• Security Systems  

• Telecom Equipments  

• Process Control Systems  

• Automatic Test Equipments  

• Instrumentation  

Dimensions  

Dimensions in mm (inch)  

24.13  

(.950)  

24.90  

(.980)  

W

0.51  

0.51  

3.00 NOM.  

(.

1

18)  

3.00 NOM.  

(0.020)  

(0.020)  

H

(.

1

18)  

0.51 NOM.  

(0.020)  

0.51 NOM.  

(0.020)  

10.16 NOM.  

(.400)  

20.32 NOM.  

(.800)  

10.16 NOM.  

(.400)  

20.32 NOM.  

(.800)  

2.54 NOM.  

(.100)  

0.25 NOM.  

(.010)  

Fig. 1: HE3321A, HE3351A  

Fig. 2: HE3321C  

Fig. 3: HE3300 (All)  

Table 1: Dimension  

Relay Type  

Body Type  

L

W

H

Transfer Molded  

External Shield  

24.13 (.950)  

24.90 (.980)  

7.00 (.276)  

7.60 (.299)  

7.40 (.291)  

7.80 (.307)  

HE3300  

© 2016 Littelfuse  

Revised: 03/04/16  

littelfuse.com  

Specifications are subject to change without notice.  

Reed Relays  

SIL Packaged > HE3300  

HE3300 Miniature Single In-line Reed Relay  

Table 2: Electrical and Operating Characteristics @ 25°C  

Column Number  

1

2

3

Form A  

SPST-NO  

Standard  

Form A  

SPST-NO  

Form C  

SPST-CO  

Standard  

Contact Type  

Relay Types  

High Voltage  

HE3321A  

HE3351A  

HE3321C  

Power, Switching  

Voltage, Switching  

Current, Switching  

Current, Carry  

Watt – max.  

Vdc – max.  

A – max.  

10  

200  

0.5  

1.2  

10  

300  

0.5  

1.5  

5

175  

0.25  

1.5  

Contact Rating

1  

A – max.  

Across Open Contacts  

Contacts to Coil  

Vdc – min.  

Vac – min.  

250  

450  

200  

Voltage Hold-off

4  

Resistance

5  

Timing  

2500  

2500  

2500  

Contact, Initial  

Insulation Across Open Contacts  

Insulation Between Isolated Terminals  

Ω max.  

Ω min.  

Ω min.  

0.150  

10

10  

0.150  

10

10  

0.200  

10

10  

10

10  

10

10  

10

10  

Operate Time  

Release Time  

ms – max.  

ms – max.  

1.0  

1.0  

1.0  

1.0  

3.0  

3.0  

Temperature, Operating  

Temperature, Storage  

Vibration Resistance  

Shock Resistance  

°C  

-40 to +85  

-40 to +105  

20  

-20 to +85  

-40 to +105  

20  

-40 to +85  

-40 to +105  

20  

°C  

Environmental  

G – max. 10-2000 Hz.  

G – max. 11 ms ½ sine  

50  

50  

50  

Table 3: Coil Characteristics @ 25°C  

Electrical and  

Contact  

Nominal  

Coil  

Must  

Operate  

Vdc  

Must  

Maximum  

Top View 2.54mm (ꢀ.1″) Grid  

Dot on Case: Pin 1  

Numbers not printed on case.  

Operating  

Dimensions  

Part Number  

Coil Voltage

 

Resistance  

Release Coil

 

Voltage  

Form and Type  

Characteristics  

Vdc  

1ꢀ0 Ohms  

Vdc  

Vdc  

HE3321A0400  

HE3321A1200  

HE3321A2400  

5

500  

500  

3.75  

9.0  

0.5  

1.0  

2.0  

22  

22  

44  

1

2

3

4

1A  

SPST-NO  

See Table 2  

Column 1  

See  

Figure 1  

12  

24  

2000  

18.0  

HE3321C0500  

HE3321C1200  

HE3321C2400  

5

125  

500  

3.75  

9.0  

0.5  

1.0  

2.0  

11  

22  

44  

1

2

3

5

4

1C  

SPDT-CO  

See Table 2  

Column 3  

See  

Figure 2  

12  

24  

2000  

18.0  

HE3351A0500  

HE3351A1200  

HE3351A2400  

5

125  

500  

3.75  

9.0  

0.5  

1.0  

2.0  

11  

22  

44  

1

2

3

4

1A  

See Table 2  

Column 2  

See  

Figure 1  

SPST-NO  

High Voltage  

12  

24  

2000  

18.0  

© 2016 Littelfuse  

Revised: 03/04/16  

littelfuse.com  

Specifications are subject to change without notice.  

Reed Relays  

SIL Packaged > HE3300  

HE3300 Miniature Single In-line Reed Relay  

Part Numbering System  

HE3300 PCB L

A

YOUT (Bottom View)  

HE33XX – X – XX – XX  

HE3321A  

HE3351A  

HE3321C  

0.80 HOLE Ø(.032)  

Model Number  

HE3321 – Standard  

HE3351 – High Voltage  

5.08 TYP (.200)  

Contac

t

T

y

pe  

A – Form A (SPS

T

–

NO)  

C – Form C (SPD

T

–

CO)  

10.16 (.400)  

20.32 (.800)  

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  

littelfuse.com  

Specifications are subject to change without notice.