Stearns AC Rectifiers Catalog Page

AC Rectifiers for use with
Armature Actuated Brakes

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Product Overview

Full Wave

Input

NOTE: For brake response times with
and without AC rectifiers see page 97.

Output

A rectifier in which both positive and negative half-cycles
of the incoming (AC) signal are rectified to produce a
unidirectional (DC) current through the load. The DC
output voltage of a full wave rectifier is V
Maximum operating voltage is +10% ofnominal,frequency 50/60 Hz, maximum ambient temperature range of -40°C to 65°C

Half Wave

DC=

.90V

AC

Input

Output

A rectifier in which only alternate half-cycles of the
incoming (AC) signal are rectified to produce a
unidirectional (DC) current through the load. The DC
output voltage of a half wave rectifier is V

DC=

.45V

AC.

Maximum operating voltage is +10% of nominal, frequency 50/60 Hz, maximum ambient temperature range of -40°C to 65°C

Combination Full and Half Wave

Provides option of utilizing either full or half wave rectification
Maximum operating voltage is +10% of nominal, frequency 50/60 Hz.
Maximum ambient temperature range is -40°C to 65°C

TOR-AC Full and Half Wave

Provides coil turn off nearly as fast as DC side switching. Includes line filter for AC drive applications or whenever electrical
filtering is required to protect the rectifier from high-frequency electrical line pulses. Must be switched on/off by a switch in an
AC lead of the TOR-AC. Maximum operating voltage +10% of nominal, frequency 50/60 Hz.
Maximum ambient temperature range is -40°C to 65°C

QuickSet

A rectifier that provides a quick brake response time even when the rectifier is permanently wired
across the windings of an AC motor. The QuickSet Rectifier detects the decaying, motor generated
voltage that occurs when power is removed from the motor circuit, and interrupts brake coil current
in response. QuickSet Rectifiers can be specified full wave or half wave.
Operating voltage is ±10% of nominal, frequency 50/60 Hz.
Maximum ambient temperature range is -40°C to 65°C

QuickSet/QuickRelease

A rectifier that provides a timed, full wave rectified “over-excitation” brake release
function, followed by continuous, half wave rectified brake released “holding” function,

when used in conjunction with an appropriate brake coil voltage rating.
USED AS WATTSAVER: Provides a timed, full wave rectified brake release function, followed by continuous, half wave

rectified brake released “wattsaver” function, when used in conjunction with an appropriate brake coil voltage rating. The
Wattsaver serves to reduce the electrical power consumption and dissipation of the brake in the released state. Operating
voltage is ±10% of nominal,
frequency 50/60 Hz. Maximum

Input

Output

ambient temperature varies by part
number - see information by part number
on following pages.

Bi-Phase Rectifiers

A rectifier that is typically used in single phase, reversing, permanent
split capacitor (PSC) motor applications. A single phase, reversing,
PSC motor typically has two windings of equivalent resistance. The
winding which serves as the main winding is connected directly
across the power line, the winding which serves as the auxiliary
winding is connected in series with a run capacitor across the power
line. The direction of rotation is reversed by interchanging the
function of the two windings. The Bi-Phase Rectifier provides the
same voltage to the brake coil regardless of the direction of rotation
of the motor. The Bi-Phase Rectifier has five leads and comes in
standard response and QuickSet versions. Bi-Phase Rectifiers are
application specific. Please contact factory for more information.

Up

Down

Capacitor

Bi-phase

Rectifier

Module

PSC
Motor

Brake

89

AC Rectifiers Selection

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115 Vac

Input

Voltage

**At 50 Vdc
coil voltage,
this rectifier
can be used
on brake
sizes
72-112.
At 103 Vdc
coil voltage,
this rectifier
can be
used on
brake sizes
72-196. At
all other
listed coil
voltages,
this rectifier
can be used
on any
brakes size.

230 Vac

Input

Voltage

**At 50 Vdc
coil voltage,
this rectifier
can be used
on brake
sizes
72-112.
At 103 Vdc
coil voltage,
this rectifier
can be used
on brake
sizes 72-196.
At all other
listed coil
voltages, this
rectifier can
be used on
any brakes
size.

Full Wave

Brake Sizes Part Number

72-196 412029101K 115 103 K or J

ALL 412029201K 115 103 K or J

ALL 412029203K 115 103 K or J

AC

Input

50/60 Hz

DC

Output

Voltage/Letter

Designation

Combination Full and Half Wave

Brake Sizes Part Number

** 412049101K

AC

Input

115/230
460/575

DC

Output

50/103
207/259
414/517

Brake Coil Voltage/

Letter Designation

50 Vdc = G 103 Vdc = K
207 Vdc = M 259 Vdc = S
414 Vdc = B 517 Vdc = A

Quick Set/Quick Release or 103 Vdc Wattsaver

Brake Sizes Part Number

72-112 412019611K 115

AC

Input

DC

Output

103 Vdc

over-excitation

50 Vdc

Sustaining

Brake Coil Voltage/

Letter Designation

Full Wave

Brake Sizes Part Number

ALL 412029101K 230 207 M

ALL 412029201K 230 207 M

ALL 412029203K 230 207 M

AC

Input

50/60 Hz

DC

Output

Brake Coil

Voltage/Letter

Designation

Combination Full and Half Wave

Brake Sizes Part Number

** 412049101K

AC

Input

115/230
460/575

DC

Output

50/103
207/259
414/517

Brake Coil Voltage/

Letter Designation

50 Vdc = G 103 Vdc = K

207 Vdc = M 259 Vdc = S

414 Vdc = B 517 Vdc = A

TOR-AC Rectifier with Line Filter, Full Wave

Brake Sizes Part Number

ALL

412029401K
412029402K

AC

Input

50/60 Hz

230 207 M ac side only

DC

Output

Brake Coil Voltage/

Letter Designation

QuickSet

Brake Sizes Part Number

ALL 412029601K 230 207 M

AC

Input

50/60 Hz

DC

Output

Brake Coil Voltage/

Letter Designation

QuickSet/QuickRelease or 205 Vdc Wattsaver

Brake

Part Number

Sizes

72-230 412029301K 65

Ambient

Temp

Max

AC

Input

50/60 Hz

o

C 230

DC

Output

207 Vdc

over-excitation

103 Vdc

sustaining

Brake Coil Voltage/

Letter Designation

Brake Coil

G

K or J

Switching Connection

ac or dc side or connect

across motor terminals

ac or dc side or connect

across motor terminals

ac or dc side or connect

across motor terminals

Switching Connection

ac or dc side or

connect across

motor terminals

Switching Connection

ac side only or
connect across

motor terminals

Switching Connection

ac or dc side or connect

across motor terminals

ac or dc side or connect

across motor terminals

ac or dc side or connect

across motor terminals

Switching Connection

ac or dc side or

connect across

motor terminals

Switching Connection

Switching Connection

NONE-connect

across motor

terminals

Switching Connection

ac side only or
connect across
motor terminals

ac leads

dc terminal block
ac terminal block

dc terminal block

ac leads
dc leads

ac terminal block
dc terminal block

ac terminal block
dc terminal block

ac leads

dc terminal block
ac terminal block

dc terminal block

ac leads
dc leads

ac terminal block
dc terminal block

Terminals
Leadwires

ac terminal block
dc terminal block

ac terminal block
dc terminal block

Max

Current

(amps)

.8

1.6

1.6

Max

Current

(amps)

.8

Max

Current

(amps)

2.0

1.0

Max

Current

(amps)

.8

1.6

1.6

Max

Current

(amps)

.8

Max

Current

(amps)

.6

Max

Current

(amps)

.6

Max Current

(amps)

2.0

1.0

90