Omron H3FA-A, H3FA-B, H3FA-SA, H3FA-SB, H3FA-AU Datasheet

Solid-state Timer H3FA 1

Solid-state Timer

H3FA

DIP Model Timer for PC Board Use Provides
Contact and Solid-state Output

• Four time ranges are selectable.

Models suffixed -@A@: 1 s, 10 s, 1 min, 10 min.
Models suffixed -@B@: 6 s, 60 s, 6 min, 60 min.

• Timer operation may also be controlled through an external
variable resistor.

• Timer can be cleaned while mounted on a PC Board with the
sealing tape affixed.

• Twenty-four-pin IC socket can be used for mounting the Timer.

• Mountable on a 1-inch pitch rack.
(H 19.5 × W 36.9 × D 17.75 mm)

Model Number Structure

Note: This model number legend includes combinations that are not available. Before ordering, please check the “List of Models” on page 2 for

availability.

1. Time-limit contact

None: Contact outputs (SPST-NO + SPST-NC)
S: Solid-state outputs

2. Time range

A: 1 s to 10 min
B: 6 s to 60 min

3. Operation/resetting system

None: Time-limit operation/power-OFF resetting and external

resetting, Integrating operation/power-OFF resetting and
external resetting

U: Instantaneous operation, time-limit resetting/external

resetting

4. Supply voltage

For contact output models
5DC: 5 V DC
6DC: 6 V DC
12DC: 12 V DC
24DC: 24 V DC
For solid-state output models
5/6DC: 5/6 V DC
12/24DC: 12/24 V DC

123 4

H3FA- @ @ @ @

Please read and understand this catalog before purchasing the products. Please consult OMRON representative if you have any questions or
comments. Refer to “Warranty and Application Considerations” on page 12 and “Safety Precautions” on page 9.

2 Solid-state Timer H3FA

Ordering Information

■ List of Models

Note: The desired operation/resetting system is selected by short-circuiting and opening the specified terminals.

Specifications

■ Time Ranges

Note: 1. The above timing ranges apply when the internal variable resistor of H3FA is used.

2. The external variable resistor may also be used by opening the terminal connected to the internal variable resistor.

3. Wire the appropriate terminal to select a time setting range. Refer to “Rated Time and Terminal Connections” on page 4 for details.

Item Model H3FA-A H3FA-B H3FA-SA H3FA-SB H3FA-AU H3FA-BU H3FA-SAU H3FA-SBU

Operation/resetting
system (See note.)

Time-limit operation/power-OFF resetting and external
resetting,
Integration operation/power-OFF resetting and external
resetting

Instantaneous operation, time-limit resetting/external
resetting

Time-limit contact Contact output

(SPST-NO + SPST-NC)

Solid-state output Contact output

(SPST-NO + SPST-NC)

Solid-state output

Instantaneous
contact

---

Mounting method Surface mounting (with IC socket or direct mounting on PC Board)

Time range 1 s to 10 min 6 s to 60 min 1 s to 10 min 6 s to 60 min 1 s to 10 min 6 s to 60 min 1 s to 10 min 6 s to 60 min

Supply
voltage

5 V DC H3FA-A 5DC H3FA-B 5DC --- --- H3FA-AU

5DC

H3FA-BU
5DC

--- ---

6 V DC H3FA-A 6DC H3FA-B 6DC --- --- H3FA-AU

6DC

--- --- ---

12 V DC H3FA-A

12DC

H3FA-B
12DC

--- --- H3FA-AU
12DC

H3FA-BU
12DC

--- ---

24 V DC H3FA-A

24DC

H3FA-B
24DC

--- --- H3FA-AU
24DC

H3FA-BU
24DC

--- ---

5/6 V DC --- --- H3FA-SA

5/6DC

H3FA-SB
5/6DC

--- --- H3FA-SAU

5/6DC

H3FA-SBU
5/6DC

12/24 V DC --- --- H3FA-SA

12/24DC

H3FA-SB
12/24DC

--- --- H3FA-SAU

12/24DC

H3FA-SBU
12/24DC

Model Rated time Time setting range

H3FA-A 1 s 0.1 to 1 s

H3FA-AU 10 s 1 to 10 s

H3FA-SA 1 min 0.1 to 1 min

H3FA-SAU 10 min 1 to 10 min

H3FA-B 6 s 0.6 to 6 s

H3FA-BU 60 s 6 to 60 s

H3FA-SB 6 min 0.6 to 6 min

H3FA-SBU 60 min 6 to 60 min

Solid-state Timer H3FA 3

■ Ratings

Note: 1. Permissible ripple: 20% max. (3% max. at 5, 6 V DC-operated models)

2. Supply voltage can be selected by short-circuiting (12 V DC) or opening (24 V DC) the specified terminals.

■ Characteristics

Note: 1. Add or subtract 10 ms to the ratings when using a timer with a rated time of 1 s.

2. Applicable to contact output models.

■ Life-test Curve (Reference Values)

Item H3FA-A/ H3FA-B

H3FA-AU/ H3FA-BU

H3FA-SA/ H3FA-SB

H3FA-SAU/ H3FA-SBU

Rated supply voltage 5 V DC, 6V DC, 12V DC, 24 V DC (See note 1.) 5/6 V DC (See note 1.)

12/24 V DC (See notes 1 and 2.)

Operating voltage range 5 V DC: 90% to 110% of rated supply voltage

6, 12, 24 V DC: 85% to 110% of rated supply voltage

5/6 V DC: 90% to 110% of rated supply voltage
12/24 V DC: 85% to 110% of rated supply voltage

Power consumption 5, 6 V DC: approx. 230 mW

12 V DC: approx. 270 mW
24 V DC: approx. 330 mW

5/6 V DC: approx. 80 mW
12 V DC: approx. 100 mW
24 V DC: approx. 240 mW

Control outputs Contact output: SPST-NO + SPST-NC,

3 A at 250 V AC with resistive load,
Minimum applied load: 10 mA at 5 V DC
(Failure level: P, reference value)

Solid-state output: 150 mA max. at 30 V DC
Residual voltage: 1.0 V max.

Ambient temperature Operating:

−10°C to 55°C (with no icing)

Storage:

−25°C to 65°C (with no icing)

Ambient humidity 35% to 85%

X

Mean X/Mean value × 100 ≤ 20 (%) max.

Where,

Accuracy of operating time ±0.5% FS max. (See note 1.)

Setting error 0 to 30 % FS max. (at 20°C , at rated voltage)

Reset time 10 ms max.

Influence of voltage ±1% FS max. (2% FS max. for 5, 6, 5/6 V DC-operated models)

Influence of temperature ±5% FS max. (See note 1.)

Insulation resistance 100 M

Ω min. (at 500 V DC)

Dielectric strength 1,500 V AC, 50/60 Hz for 1 min (between control output and operating circuit) (See note 2.)

1,000 V AC, 50/60 Hz for 1 min (between contacts not located next to each other) (See note 2.)

Vibration resistance Destruction: 10 to 55 Hz with 0.375-mm single amplitude in 3 directions for 1 hour each

Malfunction: 10 to 55 Hz with 0.25-mm single amplitude in 3 directions for 10 minutes each

Shock resistance

Destruction: 1,000 m/s

2

3 times each in 6 directions

Malfunction: 100 m/s

2

3 times each in 6 directions

Life expectancy Mechanical: 10,000,000 operations min. (under no load at 1,800 operations/h)

Electrical: 100,000 operations min. (3 A at 250 V AC, resistive load at 1,800 operations/h)

Approved safety standards UL508, CSA C22.2 No.14

Weight Contact output models: approx. 15 g

Solid-state output models: approx. 10 g

1,000

700
500

300

100

70
50

30

10

5

01234

Load current

(A)

7

24 VDC L/R=7 ms

24 VDC cosφ=1

250 VAC cosφ=1250 VAC cosφ=0.4

Switching operations (x10

4

)

4 Solid-state Timer H3FA

Connections

■ Block Diagrams

Note: All diagrams are views from the top.

H3FA-A, H3FA-B, H3FA-SA, H3FA-SB

When the input voltage is applied, the CR oscillator circuit in the
Timer starts to oscillate via the power supply circuit, the counter
circuit counts up to the preset setting, and an output signal is
produced. A transistor amplifies this signal to drive the load.

The voltage across the H3FA-SA and -SB (solid-state output loads)
is the load input voltage minus the residual voltage when the
transistor turns ON.

H3FA-AU, H3FA-BU, H3FA-SAU, H3FA-SBU

■ Rated Time and Terminal Connections

Note: 1. Short-circuit terminals 21 and 22 when using the internal variable resistor of H3FA.

2. An external resistor can also be used by opening terminals 21 and 22. When using an external resistor (1 M

Ω for H3FA-A/-SA, 3 MΩ for H3FA-B/

-SB), connect it between terminals 21 and 23.

Model Terminal connection

H3FA-A/-SA/-AU/-SAU 1 s 10 s 1 min 10 min

H3FA-B/-SB/-BU/-SBU 6 s 60 s 6 min 60 min

Power
supply

For the external resistor
For the internal variable

resistor

Power supply

circuit

Voltage stabili-

zer circuit

CR oscillator

circuit

Counter circuit

Output amplifier

circuit

Reset circuit

Reset input

Time range

selector

Contact output (NO contact for

time-limit operation)

Contact output (NC contact for

time-limit operation)

Power
supply

For the external resistor
For the internal variable

resistor

Power supply

circuit

Voltage stabili-

zer circuit

CR oscillator

circuit

Counter circuit

Output amplifier

circuit

Reset circuit

Reset input

5 to 24 V DC

Time range selector

Load

Short for 12 V DC
Open for 24 V DC (See note.)

Contact Output Solid-state Output

10: Solid-state output terminal
12: Terminal for the internal load surge absorbing diode

Note: When using 12/24 V DC

-operated models.

Power
supply

For the external resistor
For the internal variable resistor

Power supply

circuit

Voltage stabili-

zer circuit

CR oscillator

circuit

Counter circuit

Output amplifier

circuit

Reset circuit

Start circuit

Power
supply

For the external resistor

For the internal variable resistor

Power supply

circuit

Voltage stabili-

zer circuit

CR oscillator

circuit

Counter circuit

Output amplifier

circuit

Reset circuit

Start circuit

5 to 24 V DC

Load

150 mA max.
Load surge­absorbing diode

Short for 12 V DC
Open for 24 V DC (See note.)

Solid-state OutputContact Output

Note: When using a 12/24 V DC-operated model.

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