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Thyristors
25 Amp Standard & Alternistor (High Commutation) Triacs
Qxx25xx & Qxx25xHx Series
RoHS
Description
This 25 Amp bi-directional solid state switch series is
designed for AC switching and phase control applications
such as motor speed and temperature modulation controls,
lighting controls, and static switching relays.
Standard alternistor triac components operate with
in-phase signals in Quadrants I or III and ONLY unipolar
negative gate pulses for Quadrant II or III. The alternistor
triac will not operate in Quadrant IV.
Agency Approval
Agency
Agency File Number
TO-220L, TO-218K, TO-218J
Main Features
Symbol
IT(RMS)
VDRM/ VRRM
IGT
Value
25
1000
50 or 80
Schematic Symbol
Unit
A
V
mA
MT2
MT1
G
Features & Benefits
• RoHS compliant
• Glass – passivated
junctions
• Voltage capability up
to 1000 V
• S urge capability up
to 250A at 60 Hz
half cycle
Applications
Excellent for AC switching and phase control applications
such as heating, lighting, and motor speed controls.
Typical applications are AC solid-state switches, industrial
power tools, exercise equipment, white goods and
commercial appliances.
Alternistor Triacs (no snubber required) are used in
applications with high inductive loads requiring the highest
commutation performance.
Internally constructed isolated packages are offered for
ease of heat sinking with highest isolation voltage.
Additional Information
Datasheet
Resources
Samples
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/16/18

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Thyristors
25 Amp Standard & Alternistor (High Commutation) Triacs
Absolute Maximum Ratings – Standard Triac
Symbol
Parameter
IT(RMS)
RMS on-state current
ITSM Peak non-repetitive surge current
I2t
di/dt
IGTM
PG(AV)
Tstg
TJ
I2t Value for fusing
Critical rate-of-rise of on-state current
Peak gate current
Average gate power dissipation
Storage temperature range
Operating junction temperature range
Test Conditions
Qxx25R5
Qxx25N5
TC = 85°C
Qxx25R5
Qxx25N5
Qxx25R5
Qxx25N5
full cycle; f = 50Hz;
TJ (initial) = 25°C
full cycle; f = 60Hz;
TJ (initial) = 25°C
tp = 8.3ms
f = 60Hz; TJ =125°C
TJ = 125°C
TJ = 125°C
Qxx25R5
Qxx25N5
Value
25
Unit
A
167
A
200
166
100
2
0.5
-40 to 125
-40 to 125
A2s
A/μs
A
W
°C
°C
Absolute Maximum Ratings – Alternistor Triac
Symbol
Parameter
IT(RMS)
RMS on-state current
ITSM
I2t
di/dt
IGTM
PG(AV)
Tstg
TJ
Note: xx = voltage/10
Peak non-repetitive surge current
I2t Value for fusing
Critical rate-of-rise of on-state current
Peak gate current
Average gate power dissipation
Storage temperature range
Operating junction temperature range
Test Conditions
Qxx25LH5
Qxx25L6
TC = 65°C
Qxx25K6
Qxx25J6
TC = 85°C
Qxx25RH5
Qxx25NH5
Qxx25R6
Qxx25NH6
TC = 95°C
full cycle; f = 50Hz;
TJ (initial) = 25°C
full cycle; f = 60Hz;
TJ (initial) = 25°C
tp = 8.3ms
f = 60Hz; TJ =125°C
TJ = 125°C
TJ = 125°C
Value
Unit
25 A
208
250
260
100
2
0.5
-40 to 125
-40 to 125
A
A2s
A/μs
A
W
°C
°C
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/16/18

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Thyristors
25 Amp Standard & Alternistor (High Commutation) Triacs
Electrical Characteristics (TJ = 25°C, unless otherwise specified) — Standard Triac
Symbol
Test Conditions
IGT VD = 12V; RL = 60 Ω
VGT
VGD
IH
dv/dt
(dv/dt)c
tgt
VD = 12V; RL = 60 Ω
VD = VDRM; RL = 3.3 kΩ ; TJ = 125°C
IT = 400mA (initial)
VD = VDRM; Gate Open; TJ = 125°C
VD = VDRM; Gate Open; TJ = 100°C
(di/dt)c = 13.3 A/ms; TJ = 125°C
IG = 2 x IGT; PW = 15µs; IT = 35.4 A
Quadrant
I – II – III
IV
I – II – III
IV
ALL
400V
600V
800V
1000V
MAX.
TYP.
MAX.
TYP.
MIN.
MAX.
MIN.
MIN.
TYP.
Value
Qxx25R5
Qxx25N5
50
120
1.3
2.5
0.2
100
275
225
200
200
5
4
Unit
mA
V
V
mA
V/μs
V/μs
μs
Electrical Characteristics (TJ = 25°C, unless otherwise specified) — Alternistor Triac
Symbol
Test Conditions
IGT
VGT
VGD
IH
dv/dt
(dv/dt)c
tgt
VD = 12V; RL = 60 Ω
VD = 12V; RL = 60 Ω
VD = VDRM; RL = 3.3 kΩ ; TJ = 125°C
IT = 400mA (initial)
VD = VDRM; Gate Open; TJ = 125°C
VD = VDRM; Gate Open; TJ = 100°C
(di/dt)c = 13.3 A/ms; TJ = 125°C
IG = 2 x IGT; PW = 15µs; IT = 35.4 A
Quadrant
I – II – III
I – II – III
I – II – III
400V
600V
800V
1000V
MAX.
MAX.
MIN.
MAX.
MIN.
MIN.
TYP.
Value
Qxx25RH5
Qxx25LH5
Qxx25NH5
Qxx25R6
Qxx25L6
Qxx25NH6
Qxx25K6
Qxx25J6
50 80
1.3
0.2
50 100
575 600
500 600
400 475
— 400
20 30
35
Unit
mA
V
V
mA
V/μs
V/μs
μs
Static Characteristics
Symbol
Test Conditions
VTM IT = 35.4A; tp = 380 μs
IDRM / IRRM
VDRM / VRRM
Note: xx = voltage/10, x = package
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/16/18
TJ = 25°C
TJ = 100°C
TJ = 125°C
600 – 800V
1000V
600 – 800V
1000V
600 – 800V
MAX.
MAX.
Value
Qxx25R5
Qxx25N5
Qxx25xH5
Qxx25x6
Qxx25NH6
1.8
10
20
500
1000
2000
Unit
V
μA

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Thyristors
25 Amp Standard & Alternistor (High Commutation) Triacs
Thermal Resistances
Symbol
Parameter
Rθ(J-C)
Junction to case (AC)
Rθ(J-A)
Junction to ambient
Note: xx = voltage/10, y = sensitivity
Qxx25R5 / Qxx25N5
Qxx25R6 / Qxx25NH6
Qxx25RH5 / Qxx25NH5
Qxx25L6 / Qxx25LH5
Qxx25K6 / Qxx25J6
Qxx25Ry
Qxx25L6 / Qxx25LH5
Value
0.89
2.0
1.32
45
50
Unit
°C/W
°C/W
Figure 1: Normalized DC Gate Trigger Current
vs. Junction Temperature
2.5
2.0
1.5
1.0
0.5
0.0
-40
-15 10 35 60 85
Junction Temperature (TJ) -- (°C)
110 125
Figure 3: Normalized DC Holding Current
vs. Junction Temperature
2.0
1.5
1.0
0.5
0.0
-40
-15 10 35 60 85
Junction Temperature (TJ) -- (ºC)
110 125
Figure 2: N ormalized DC Gate Trigger Voltage
vs. Junction Temperature
2.0
1.5
1.0
0.5
0.0
-40
-15 10 35 60 85
Junction Temperature (TJ) -- (ºC)
110 125
Figure 4: O n-State Current vs. On-State
Voltage (Typical)
90
TJ = 25°C
80
70 Qxx25P5/Qxx25R6
Qxx25L6/Qxx25NH6
60
Qxx25K6/Qxx25J6
Qxx25RH5/Qxx25LH5
Qxx25NH5
50
40
30
20
Qxx25R5
Qxx25N5
10
0
0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7
Instantaneous On-state Voltage (vT) – Volts
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/16/18

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Thyristors
25 Amp Standard & Alternistor (High Commutation) Triacs
Figure 5: Power Dissipation (Typical) vs. RMS
On-State Current
35
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
30 CONDUCTION ANGLE: 360°
25
Qxx25R5
Qxx25N5
20
15
Qxx25P5/Qxx25R6
Qxx25L6/Qxx25NH6
10 Qxx25K6/Qxx25J6
Qxx25RH5/Qxx25LH5
Qxx25NH5
5
0
0 5 10 15 20 25
RMS On-State Current [IT(RMS)] -- Amps
Figure 6: M aximum Allowable Case Temperature
vs. RMS On-State Current
130
Qxx25R6
120
Qxx25NH6
Qxx25RH5
Qxx25NH5
Qxx25R5
Qxx25N5
110
Qxx25K6
Qxx25J6
100
90 Qxx25L6
Qxx25LH5
80
Qxx25P5
70
60
50
0
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 360°
5 10 15 20
RMS On-State Current [IT(RMS)] - Amps
25
30
Figure 7: Maximum Allowable Ambient Temperature vs. RMS On-State Current (TO-220 packages only)
120
100
80
60
40
20
0
0.0
CURRENT WAVEFORM: Sinusoidal
LOAD: Resistive or Inductive
CONDUCTION ANGLE: 360°
FREE AIR RATING
0.5 1.0 1.5 2.0
RMS On-State Current [IT(RMS)] -- Amps
2.5
Figure 8: Surge Peak On-State Current vs. Number of Cycles
1000
Qxx25P5/Qxx25R6
Qxx25L6/Qxx25NH6
Qxx25K6/Qxx25J6
Qxx25RH5/Qxx25LH5
Qxx25NH5
100
Qxx25R5
Qxx25N5
SUPPLY FREQUENCY: 60 Hz Sinusoidal
LOAD: Resistive
RMS On-State Current: [IT(RMS)]: Maximum Rated Value at
Specified Case Temperature
Notes:
1. G ate control may be lost during and immediately
following surge current interval.
2. O verload may not be repeated until junction
temperature has returned to steady-state
rated value.
10
1 10 100
Surge Current Duration -- Full Cycles
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/16/18
1000