PACKAGE

SCHEMATIC

6/15/05

Page 1 of 11

6-PIN DIP RANDOM-PHASE

OPTOISOLATORS TRIAC DRIVERS

(600 VOLT PEAK)

MOC3051-M

MOC3052-M

DESCRIPTION

The MOC3051-M and MOC3052-M consist of a AlGaAs infrared emitting diode optically coupled to a non-zero-crossing silicon
bilateral AC switch (triac). These devices isolate low voltage logic from 115 and 240 Vac lines to provide random phase control of
high current triacs or thyristors. These devices feature greatly enhanced static dv/dt capability to ensure stable switching perfor-
mance of inductive loads.

FEATURES

Excellent I

stability--IR emitting diode has low degradation

High isolation voltage--minimum 7500 peak VAC

Underwriters Laboratory (UL) recognized--File #E90700

600V peak blocking voltage

VDE recognized (File #94766)
- Ordering option V (e.g. MOC3052V-M)

APPLICATIONS

Solenoid/valve controls

Lamp ballasts

Static AC power switch

Interfacing microprocessors to 115 and 240 Vac peripherals

Solid state relay

Incandescent lamp dimmers

Temperature controls

Motor controls

MAIN TERM.

NC*

N/C

*DO NOT CONNECT
(TRIAC SUBSTRATE)

ANODE

CATHODE

6 MAIN TERM.

6/15/05

Page 2 of 11

6-PIN DIP RANDOM-PHASE

OPTOISOLATORS TRIAC DRIVERS

(600 VOLT PEAK)

MOC3051-M

MOC3052-M

ABSOLUTE MAXIMUM RATINGS

= 25°C unless otherwise noted)

Parameters

Symbol

Device

Value

Units

TOTAL DEVICE

Storage Temperature

STG

All

-40 to +150

°C

Operating Temperature

OPR

All

-40 to +85

°C

Lead Solder Temperature

SOL

All

260 for 10 sec

°C

Junction Temperature Range

All

-40 to +100

°C

Isolation Surge Voltage

(3)

(peak AC voltage, 60Hz, 1 sec duration)

ISO

All

7500

Vac(pk)

Total Device Power Dissipation @ 25°C

All

330

Derate above 25°C

4.4

mW/°C

EMITTER

Continuous Forward Current

All

Reverse Voltage

All

Total Power Dissipation 25°C Ambient

All

100

Derate above 25°C

1.33

mW/°C

DETECTOR

Off-State Output Terminal Voltage

DRM

All

600

Peak Repetitive Surge Current (PW = 100 ms, 120 pps)

TSM

All

Total Power Dissipation @ 25°C Ambient

All

300

Derate above 25°C

mW/°C

6/15/05

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6-PIN DIP RANDOM-PHASE

OPTOISOLATORS TRIAC DRIVERS

(600 VOLT PEAK)

MOC3051-M

MOC3052-M

*Typical values at T

= 25°C

Note
1. Test voltage must be applied within dv/dt rating.
2. All devices are guaranteed to trigger at an I

value less than or equal to max I

. Therefore, recommended operating I

lies

between max 15 mA for MOC3051, 10 mA for MOC3052 and absolute max I

(60 mA).

3. Isolation surge votlage, VISO, is an internal device breakdown rating. For this text, pins 1 and 2 are common, and pins 4, 5 and

6 are common.

ELECTRICAL CHARACTERISTICS

= 25°C Unless otherwise specified)

INDIVIDUAL COMPONENT CHARACTERISTICS

Parameters

Test Conditions

Symbol

Device

Min

Typ*

Max

Units

EMITTER

Input Forward Voltage

= 10 mA

All

1.15

1.5

Reverse Leakage Current

= 3 V

All

0.05

100

µA

DETECTOR

Peak Blocking Current, Either Direction

DRM

, I

= 0 (note 1)

DRM

All

100

Peak On-State Voltage, Either Direction

= 100 mA peak, I

= 0

All

1.7

2.5

Critical Rate of Rise of Off-State Voltage

= 0 (figure 7, @400V)

dv/dt

All

1000

V/µs

TRANSFER CHARACTERISTICS

= 25°C Unless otherwise specified.)

DC Characteristics

Test Conditions

Symbol

Device

Min

Typ*

Max

Units

LED Trigger Current,
either direction

Main terminal

Voltage = 3V (note 2)

MOC3051-M

MOC3052-M

Holding Current, Either Direction

All

280

µA

6/15/05

Page 4 of 11

6-PIN DIP RANDOM-PHASE

OPTOISOLATORS TRIAC DRIVERS

(600 VOLT PEAK)

MOC3051-M

MOC3052-M

versus Temperature (normalized)

This graph (figure 3) shows the increase of the trigger current
when the device is expected to operate at an ambient tempera-
ture below 25°C. Multiply the normalized I

shown this graph

with the data sheet guaranteed I

Example:
T

= -40°C, I

= 10 mA

@ -40°C = 10 mA x 1.4 = 14 mA

Phase Control Considerations

LED Trigger Current versus PW (normalized)

Random Phase Triac drivers are designed to be phase control-
lable. They may be triggered at any phase angle within the AC

sine wave. Phase control may be accomplished by an AC line
zero cross detector and a variable pulse delay generator which
is synchronized to the zero cross detector. The same task can
be accomplished by a microprocessor which is synchronized
to the AC zero crossing. The phase controlled trigger current
may be a very short pulse which saves energy delivered to the
input LED. LED trigger pulse currents shorter than 100 µs must
have an increased amplitude as shown on Figure 4. This graph
shows the dependency of the trigger current I

versus the

pulse width can be seen on the chart delay t(d) versus the LED
trigger current.

in the graph I

versus (PW) is normalized in respect to the

minimum specified I

for static condition, which is specified in

the device characteristic. The normalized I

has to be multi-

plied with the devices guaranteed static trigger current.

Example:
Guaranteed I

= 10 mA, Trigger pulse width PW = 3 µs

(pulsed) = 10 mA x 5 = 50 mA

Figure. 4 LED Current Required to Trigger vs. LED Pulse Width

Figure. 2 On-State Characteristics

ON-STATE VOLTAGE - V

(V)

-3

-2

-1

ON-ST

E CURRENT - I

(mA)

-800

-600

-400

-200

200

400

600

800

PWin, LED TRIGGER PULSE WIDTH (µs)

100

NORMALIZED TO:

PWin 100 µs

I FT

, NORMALIZED LED

TRIGGER CURRENT

Figure. 3 Trigger Current vs. Ambient Temperature

AMBIENT TEMPERATURE - T

(

-40

-20

100

TRIGGER CURRENT - I

(NORMALIZED)

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

Figure. 1 LED Forward Voltage vs. Forward Current

- LED FORWARD CURRENT (mA)

100

- FOR

ARD

E (V)

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

= -55

= 25

= 100

NORMALIZED TO TA = 25°C

6/15/05

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6-PIN DIP RANDOM-PHASE

OPTOISOLATORS TRIAC DRIVERS

(600 VOLT PEAK)

MOC3051-M

MOC3052-M

Minimum LED Off Time in Phase Control
Applications

In Phase control applications one intends to be able to control
each AC sine half wave from 0 to 180 degrees. Turn on at zero
degrees means full power and turn on at 180 degree means
zero power. This is not quite possible in reality because triac
driver and triac have a fixed turn on time when activated at
zero degrees. At a phase control angle close to 180 degrees
the driver's turn on pulse at the trailing edge of the AC sine
wave must be limited to end 200 ms before AC zero cross as
shown in Figure 5. This assures that the triac driver has time
to switch off. Shorter times may cause loss of control at the
following half cycle.

versus dv/dt

Triac drivers with good noise immunity (dv/dt static) have inter-
nal noise rejection circuits which prevent false triggering of the
device in the event of fast raising line voltage transients. Induc-
tive loads generate a commutating dv/dt that may activate the
triac drivers noise suppression circuits. This prevents the
device from turning on at its specified trigger current. It will in
this case go into the mode of "half waving" of the load. Half
waving of the load may destroy the power triac and the load.

Figure 8 shows the dependency of the triac drivers I

versus

the reapplied voltage rise with a Vp of 400 V. This dv/dt condi-
tion simulates a worst case commutating dv/dt amplitude.

It can be seen that the I

does not change until a commutat-

ing dv/dt reaches 1000 V/ms. The data sheet specified I

therefore applicable for all practical inductive loads and load
factors.

Figure. 7 Leakage Current, I

DRM

vs. Temperature

TA , AMBIENT TEMPERATURE (

-40

-20

100

I DRM

, LEAKA

GE CURRENT (nA)

0.1

100

1000

10000

Figure 5. Minimum Time for LED TurnOff to Zero

Cross of AC Trailing Edge

AC SINE

180

LED PW

LED CURRENT

LED TURN OFF MIN 200

µs

Figure. 6 Holding Current, I

vs. Temperature

TA, AMBIENT TEMPERATURE (

I H

, HOLDING CURRENT (mA)

- 40

0.9

- 30 - 20 -10

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

dv/dt (V/

µs)

0.001

1.5

0.5

10000

NORMALIZED TO:

IFT at 3 V

I FT

, LED

TRIGGER CURRENT

(NORMALIZED)

1.4

1.3

1.2

1.1

0.9

0.8

0.7

0.6

0.01

0.1

100

1000

Figure. 8 LED Trigger Current, I

vs. dv/dt

6/15/05

Page 6 of 11

6-PIN DIP RANDOM-PHASE

OPTOISOLATORS TRIAC DRIVERS

(600 VOLT PEAK)

MOC3051-M

MOC3052-M

t(delay), t(f) versus I

The triac driver's turn on switching speed consists of a turn on
delay time t(d) and a fall time t(f). Figure 9 shows that the delay
time depends on the LED trigger current, while the actual
trigger transition time t(f) stays constant with about one micro
second.

The delay time is important in very short pulsed operation
because it demands a higher trigger current at very short
trigger pulses. This dependency is shown in the graph I

versus LED PW.

The turn on transition time t(f) combined with the power triac's
turn on time is important to the power dissipation of this
device.

1. The mercury wetted relay provides a high speed repeated

pulse to the D.U.T.

2. 100x scope probes are used, to allow high speeds and

voltages.

3. The worst-case condition for static dv/dt is established by

triggering the D.U.T. with a normal LED input current, then
removing the current. The variable R

TEST

allows the dv/dt to

be gradually increased until the D.U.T. continues to trigger
in response to the applied voltage pulse, even after the LED
current has been removed. The dv/dt is then decreased
until the D.U.T. stops triggering.

is measured at this

point and recorded.

SCOPE

IFT

VTM

t(d)

t(f)

ZERO CROSS

DETECTOR

EXT. SYNC

Vout

FUNCTION

GENERATOR

PHASE CTRL.
PW CTRL.
PERIOD CTRL.
Vo AMPL. CTRL.

IFT

VTM

10 k

DUT

100

ISOL. TRANSF.

115 VAC

Figure 9. Delay Time, t(d), and Fall Time, t(f),

vs. LED Trigger Current

, LED TRIGGER CURRENT (mA)

100

0.1

t(delay)

AND t(fall) (

)

t(f)

t(d)

Figure 10. Static dv/dt Test Circuit

+400

Vdc

PULSE

INPUT

RTEST

CTEST

R = 1 k

MERCURY

WETTED

RELAY

D.U.T.

X100

SCOPE
PROBE

APPLIED VOLTAGE

WAVEFORM

Vmax = 400 V

dv/dt =

0.63 V

252 V

0 VOLTS

6/15/05

Page 7 of 11

6-PIN DIP RANDOM-PHASE

OPTOISOLATORS TRIAC DRIVERS

(600 VOLT PEAK)

MOC3051-M

MOC3052-M

APPLICATIONS GUIDE

Basic Triac Driver Circuit

The new random phase triac driver family MOC3052-M and
MOC3051-M are very immune to static dv/dt which allows
snubberless operations in all applications where external
generated noise in the AC line is below its guaranteed dv/dt
withstand capability. For these applications a snubber circuit is
not necessary when a noise insensitive power triac is used.
Figure 11 shows the circuit diagram. The triac driver is directly
connected to the triac main terminal 2 and a series Resistor R
which limits the current to the triac driver. Current limiting
resistor R must have a minimum value which restricts the
current into the driver to maximum 1A.

R = Vp AC/I

max rep. = Vp AC/1A

The power dissipation of this current limiting resistor and the
triac driver is very small because the power triac carries the
load current as soon as the current through driver and current
limiting resistor reaches the trigger current of the power triac.
The switching transition times for the driver is only one micro
second and for power triacs typical four micro seconds.

Triac Driver Circuit for Noisy Environments

When the transient rate of rise and amplitude are expected to
exceed the power triacs and triac drivers maximum ratings a
snubber circuit as shown in Figure 12 is recommended. Fast
transients are slowed by the R-C snubber and excessive
amplitudes are clipped by the Metal Oxide Varistor MOV.

Triac Driver Circuit for Extremely Noisy Environments,

specified in the noise standards IEEE472 and IEC255-4.

Industrial control applications do specify a maximum transient
noise dv/dt and peak voltage which is superimposed onto the
AC line voltage. In order to pass this environment noise test a
modified snubber network as shown in Figure 13 is recom-
mended.

Figure 11. Basic Driver Circuit

Figure 12. Triac Driver Circuit for Noisy Environments

Figure 13. Triac Driver Circuit for Extremely Noisy

Environments

VCC

RET.

RLED

TRIAC DRIVER

POWER TRIAC

AC LINE

LOAD

CONTROL

TRIAC DRIVER

POWER TRIAC

RLED

VCC

RET.

CONTROL

MOV

LOAD

AC LINE

TRIAC DRIVER

POWER TRIAC

MOV

LOAD

AC LINE

VCC

RET.

CONTROL

RLED

RLED = (VCC - V F LED - V sat Q)/IFT
R = Vp AC line/ITSM

Typical Snubber values RS = 33 , CS = 0.01 µF
MOV (Metal Oxide Varistor) protects triac and
driver from transient overvoltages >VDRM max.

Recommended snubber to pass IEEE472 and IEC255-4 noise tests
RS = 47 W, CS = 0.01 mF

6/15/05

Page 8 of 11

6-PIN DIP RANDOM-PHASE

OPTOISOLATORS TRIAC DRIVERS

(600 VOLT PEAK)

MOC3051-M

MOC3052-M

NOTE
All dimensions are in inches (millimeters)

Package Dimensions (Through Hole)

Package Dimensions (Surface Mount)

Package Dimensions (0.4" Lead Spacing)

Recommended Pad Layout for

Surface Mount Leadform

0.350 (8.89)
0.320 (8.13)

0.260 (6.60)
0.240 (6.10)

0.320 (8.13)

0.070 (1.77)
0.040 (1.02)

0.014 (0.36)
0.010 (0.25)

0.200 (5.08)
0.115 (2.93)

0.100 (2.54)
0.015 (0.38)

0.020 (0.50)
0.016 (0.41)

0.100 (2.54)

0.012 (0.30)

Pin 1 ID

Seating Plane

0.350 (8.89)
0.320 (8.13)

0.260 (6.60)
0.240 (6.10)

0.390 (9.90)
0.332 (8.43)

0.070 (1.77)
0.040 (1.02)

0.014 (0.36)
0.010 (0.25)

0.320 (8.13)

0.035 (0.88)
0.012 (0.30)

0.012 (0.30)
0.008 (0.20)

0.200 (5.08)
0.115 (2.93)

0.025 (0.63)
0.020 (0.51)

0.020 (0.50)
0.016 (0.41)

0.100 [2.54]

Seating Plane

Pin 1 ID

0.350 (8.89)
0.320 (8.13)

0.260 (6.60)
0.240 (6.10)

0.070 (1.77)

Seating Plane

0.040 (1.02)

0.014 (0.36)
0.010 (0.25)

0.200 (5.08)
0.115 (2.93)

0.020 (0.50)
0.016 (0.41)

0.100 [2.54]

0.100 (2.54)
0.015 (0.38)

0.012 (0.30)
0.008 (0.21)

0.425 (10.80)
0.400 (10.16)

Pin 1 ID

0.070 (1.78)

0.060 (1.52)

0.030 (0.76)

0.100 (2.54)

0.305 (7.75)

0.425 (10.79)

6/15/05

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6-PIN DIP RANDOM-PHASE

OPTOISOLATORS TRIAC DRIVERS

(600 VOLT PEAK)

MOC3051-M

MOC3052-M

ORDERING INFORMATION

MARKING INFORMATION

Option

Order Entry Identifier

Description

Surface Mount Lead Bend

SR2

Surface Mount; Tape and reel

0.4" Lead Spacing

300

VDE 0884

300W

VDE 0884, 0.4" Lead Spacing

SR2V

VDE 0884, Surface Mount

3SD

SR2V

VDE 0884, Surface Mount, Tape & Reel

MOC3051

V X YY Q

*Note Parts that do not have the `V' option (see definition 3 above) that are marked with
date code `325' or earlier are marked in portrait format.

Definitions

Fairchild logo

Device number

VDE mark (Note: Only appears on parts ordered with VDE
option See order entry table)

One digit year code, e.g., `3'

Two digit work week ranging from `01' to `53'

Assembly package code

6/15/05

Page 10 of 11

6-PIN DIP RANDOM-PHASE

OPTOISOLATORS TRIAC DRIVERS

(600 VOLT PEAK)

MOC3051-M

MOC3052-M

Reflow Profile (White Package, -M Suffix)

Carrier Tape Specifications

4.0

± 0.1

Ø1.5 MIN

User Direction of Feed

2.0

± 0.05

1.75

± 0.10

11.5

± 1.0

24.0

± 0.3

12.0

± 0.1

0.30

± 0.05

21.0

± 0.1

4.5

± 0.20

0.1 MAX

10.1

± 0.20

9.1

± 0.20

Ø1.5

± 0.1/-0

300

280

260

240

220

200

180

160

140

120

100

°C

Time (s)

180

120

270

260

°C

>245

°C = 42 Sec

Time above

183

°C = 90 Sec

360

1.822

°C/Sec Ramp up rate

33 Sec

LIFE SUPPORT POLICY
FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:

1. Life support devices or systems are devices or systems

which, (a) are intended for surgical implant into the body, or
(b) support or sustain life, and (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
result in a significant injury of the user.

2. A critical component in any component of a life support

device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.

DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO
ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME
ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;
NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

6/15/05

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6-PIN DIP RANDOM-PHASE

OPTOISOLATORS TRIAC DRIVERS

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MOC3051-M

MOC3052-M

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ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: MOC3051-M