JFW050A1
ABB Power Electronics Inc.
DC DC CONVERTER 5V 50W
Stokta var5440 pcs
84%
1
Enable, Active Low
10A
36V
5V
-
-
-
1.5 kV
-
-
-
Bulk
Through Hole
JFW (50W)
-40°C ~ 100°C
2.40" L x 2.28" W x 0.50" H (61.0mm x 57.9mm x 12.7mm)
75V
Isolated Module
Remote On/Off, OCP, OTP, OVP
ITE (Commercial)
Module
-
50 W
RFQ
VE-JWM-CX
Vicor Corporation
DC DC CONVERTER 10V 75W
Stokta var5370 pcs
90%
1
-
7.5A
18V
10V
-
-
-
3 kV
-
-
VE-JWM
Bulk
Through Hole
VE-J00™ (75W)
-25°C ~ 100°C
2.28" L x 2.40" W x 0.50" H (57.9mm x 70.0mm x 12.7mm)
36V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
75 W
RFQ
LMZ22010TZ
Texas Instruments
IC REG LINEAR SWITCHING REG
Stokta var4650 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-234-CW
Vicor Corporation
DC DC CONVERTER 48V 100W
Stokta var3830 pcs
90%
1
-
2.08A
42V
48V
-
-
-
3 kV
-
-
VE-234
Bulk
Through Hole
VE-200™ (100W)
-25°C ~ 85°C
4.60' L x 2.40' W x 0.50' H (116.8mm x 61.0mm x 12.7mm)
60V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
AM80A-048L-120F18
Artesyn Embedded Power
DC DC CONVERTER 12V 240W
Stokta var5480 pcs
87%
1
-
18A
36V
12V
-
-
-
-
-
-
-
Bulk
Through Hole
AM80A (240W)
-20°C ~ 100°C
4.60" L x 2.40" W x 0.50" H (116.8mm x 61.0mm x 12.7mm)
72V
Non-Isolated PoL Module
Remote On/Off, OTP, OVP
ITE (Commercial)
Module
-
240 W
RFQ
VI-JT2-03
Vicor Corporation
VI-JT2-03 110V/15V 100W
Stokta var56 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-JT2
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VI-B50-CV-05
Vicor Corporation
DC DC CONVERTER 150W
Stokta var4200 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-B50
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VI-B6Y-IV
Vicor Corporation
DC DC CONVERTER 3.3V 99W
Stokta var3730 pcs
90%
1
-
30A
200V
3.3V
-
-
-
3 kV
-
-
VI-B6Y
Bulk
Through Hole
VI-200™ (150W)
-40°C ~ 85°C
4.60' L x 2.40' W x 0.50' H (116.8mm x 61.0mm x 12.7mm)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
99 W
RFQ
VE-263-EV
Vicor Corporation
DC DC CONVERTER 24V 150W
Stokta var125 pcs
88%
1
-
6.25A
200V
24V
-
-
-
3 kV
-
-
VE-263
Bulk
Through Hole
VE-200™ (150W)
-10°C ~ 85°C
4.60" L x 2.40" W x 0.50" H (116.8mm x 61.0mm x 12.7mm)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
LQS30A24-3V3RSJ
Artesyn Embedded Power
DC DC CONVERTER 3.3V 200W
Stokta var4740 pcs
89.5%
1
-
30A
18V
3.3V
-
-
-
2.25 kV
-
-
-
Tray
Surface Mount
LQS (200W)
-40°C ~ 85°C
2.30" L x 1.45" W x 0.28" H (58.4mm x 36.8mm x 7.1mm)
36V
Isolated Module
Remote On/Off, OTP, OVP, SCP, UVLO
ITE (Commercial)
8-SMD Module, 1/4 Brick
-
200 W
RFQ
CW025ABK-M
ABB Power Electronics Inc.
DC DC CONVERTER 5V +/-12V 25W
Stokta var4520 pcs
82%
3
Enable, Active High
5A, 1A, 1A
36V
5V
12V
-12V
-
500 V
-
-
-
Bulk
Through Hole
CW025 (25W)
-40°C ~ 100°C
2.80' L x 2.40' W x 0.50' H (71.1mm x 61.0mm x 12.7mm)
75V
Isolated Module
Remote On/Off, OCP, OVP
ITE (Commercial)
10-DIP Module
-
25 W
RFQ
VI-BWZ-CV
Vicor Corporation
DC DC CONVERTER 2V 60W
Stokta var5300 pcs
90%
1
-
30A
18V
2V
-
-
-
3 kV
-
-
VI-BWZ
Bulk
Through Hole
VI-200™ (150W)
-25°C ~ 85°C
4.60' L x 2.40' W x 0.50' H (116.8mm x 61.0mm x 12.7mm)
36V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
60 W
RFQ
VE-234-IV
Vicor Corporation
DC DC CONVERTER 48V 150W
Stokta var4020 pcs
90%
1
-
3.13A
42V
48V
-
-
-
3 kV
-
-
VE-234
Bulk
Through Hole
VE-200™ (150W)
-40°C ~ 85°C
4.60' L x 2.40' W x 0.50' H (116.8mm x 61.0mm x 12.7mm)
60V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VE-J33-CZ
Vicor Corporation
DC DC CONVERTER 24V 25W
Stokta var4760 pcs
90%
1
-
1.04A
42V
24V
-
-
-
3 kV
-
-
VE-J33
Bulk
Through Hole
VE-J00™ (25W)
-25°C ~ 100°C
2.28' L x 2.40' W x 0.50' H (57.9mm x 70.0mm x 12.7mm)
60V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
VI-812058B
Vicor Corporation
DC DC CONVERTER
Stokta var121 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-260-MX
Vicor Corporation
DC DC CONVERTER 5V 75W
Stokta var5350 pcs
90%
1
-
15A
200V
5V
-
-
-
3 kV
-
-
VE-260
Bulk
Through Hole
VE-200™ (75W)
-55°C ~ 85°C
4.60' L x 2.40' W x 0.50' H (116.8mm x 61.0mm x 12.7mm)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
MC010B
ABB Power Electronics Inc.
DC DC CONVERTER 12V 10W
Stokta var4960 pcs
83%
1
-
830mA
18V
12V
-
-
-
500 V
-
-
-
Bulk
Through Hole
MC010 (10W)
-40°C ~ 85°C
2.00" L x 1.60" W x 0.50" H (50.8mm x 40.6mm x 12.7mm)
36V
Isolated Module
OCP, OVP, UVLO
ITE (Commercial)
4-DIP Module
-
10 W
RFQ
EXB30-48S05
Artesyn Embedded Power
DC DC CONVERTER 5V 30W
Stokta var5210 pcs
92%
1
Enable, Active High
6A
36V
5V
-
-
-
1.5 kV
-
-
EXB30
-
Through Hole
EXB30 (30W)
-40°C ~ 85°C
2.40" L x 2.28" W x 0.43" H (61.0mm x 57.9mm x 10.9mm)
75V
Isolated Module
Remote On/Off, OCP, OTP, OVP, SCP, UVLO
ITE (Commercial)
9-DIP Module, 8 Leads
-
30 W
RFQ
PTH04T220WAST
Texas Instruments
DC DC CONVERTER 0.69-3.6V
Stokta var1988 pcs
94%
1
-
16A
2.2V
0.69 ~ 3.6V
-
-
-
-
-
-
PTH04
Tape & Reel (TR)
Surface Mount
PTH04T220W
-40°C ~ 85°C
0.95" L x 0.75" W x 0.36" H (24.1mm x 19.1mm x 9.1mm)
5.5V
Non-Isolated PoL Module
Remote On/Off, OCP, OTP, UVLO
ITE (Commercial)
11-SMD Module
-
-
RFQ
VI-B11-CU
Vicor Corporation
DC DC CONVERTER 12V 200W
Stokta var4480 pcs
90%
1
-
16.67A
21V
12V
-
-
-
3 kV
-
-
VI-B11
Bulk
Through Hole
VI-200™ (200W)
-25°C ~ 85°C
4.60" L x 2.40" W x 0.50" H (116.8mm x 61.0mm x 12.7mm)
32V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
VE-2N4-CX
Vicor Corporation
DC DC CONVERTER 48V 75W
Stokta var4250 pcs
90%
1
-
1.56A
36V
48V
-
-
-
3 kV
-
-
VE-2N4
Bulk
Through Hole
VE-200™ (75W)
-25°C ~ 85°C
4.60' L x 2.40' W x 0.50' H (116.8mm x 61.0mm x 12.7mm)
76V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
PKV3211PI
Flex Power Modules
DC DC CONVERTER 5V 2.5W
Stokta var1270 pcs
82%
1
-
500mA
9V
5V
-
-
-
1.5 kV
CB, CSA, IEC, TUV, UL
62368-1
PKV321
Tray
Through Hole
PKV 5000
-40°C ~ 95°C (With Derating)
1.25" L x 0.80" W x 0.42" H (31.8mm x 20.3mm x 10.7mm)
36V
Isolated Module
-
ITE (Commercial)
24-DIP Module, 10 Leads
-
2.5 W
RFQ
VE-2W4-MX
Vicor Corporation
DC DC CONVERTER 48V 75W
Stokta var4640 pcs
90%
1
-
1.56A
18V
48V
-
-
-
3 kV
-
-
VE-2W4
Bulk
Through Hole
VE-200™ (75W)
-55°C ~ 85°C
4.60' L x 2.40' W x 0.50' H (116.8mm x 61.0mm x 12.7mm)
36V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
VE-231-MU
Vicor Corporation
DC DC CONVERTER 12V 200W
Stokta var3750 pcs
90%
1
-
16.67A
42V
12V
-
-
-
3 kV
-
-
VE-231
Bulk
Through Hole
VE-200™ (200W)
-55°C ~ 85°C
4.60' L x 2.40' W x 0.50' H (116.8mm x 61.0mm x 12.7mm)
60V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
VI-B51-CV
Vicor Corporation
DC DC CONVERTER 12V 150W
Stokta var3640 pcs
90%
1
-
12.5A
100V
12V
-
-
-
3 kV
-
-
VI-B51
Bulk
Through Hole
VI-200™ (150W)
-25°C ~ 85°C
4.60" L x 2.40" W x 0.50" H (116.8mm x 61.0mm x 12.7mm)
200V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VE-J33-EZ
Vicor Corporation
DC DC CONVERTER 24V 25W
Stokta var3660 pcs
88%
1
-
1.04A
42V
24V
-
-
-
3 kV
-
-
VE-J33
Bulk
Through Hole
VE-J00™ (25W)
-10°C ~ 100°C
2.28" L x 2.40" W x 0.50" H (57.9mm x 70.0mm x 12.7mm)
60V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
VE-JW0-EZ
Vicor Corporation
DC DC CONVERTER 5V 25W
Stokta var153 pcs
88%
1
-
5A
18V
5V
-
-
-
3 kV
-
-
VE-JW0
Bulk
Through Hole
VE-J00™ (25W)
-10°C ~ 100°C
2.28' L x 2.40' W x 0.50' H (57.9mm x 70.0mm x 12.7mm)
36V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
PKB4810PINB
Flex Power Modules
DC DC CONVERTER 3.3V 83W
Stokta var4570 pcs
91.7%
1
Enable, Active Low
25A
36V
3.3V
-
-
-
2.25 kV
CB, CSA, IEC, TUV, UL
62368-1
PKB481
Tray
Through Hole
PKB4000 (90W)
-40°C ~ 120°C (With Derating)
2.30" L x 0.89" W x 0.32" H (58.4mm x 22.7mm x 8.1mm)
75V
Isolated Module
Adjustable Output, Remote On/Off, Remote Sense
ITE (Commercial)
Eighth Brick
Eighth Brick
83 W
RFQ
MI-271-IX
Vicor Corporation
DC DC CONVERTER 12V 75W
Stokta var71 pcs
90%
1
-
6.25A
100V
12V
-
-
-
3 kV
-
-
MI-271
Bulk
Through Hole
MI-200™ (75W)
-40°C ~ 85°C
4.20" L x 2.40" W x 0.50" H (106.7mm x 61.0mm x 12.7mm)
310V
Isolated Module
Remote On/Off, OCP, OTP, OVP
ITE (Commercial)
Full Brick
-
75 W
RFQ
VE-J12-MX
Vicor Corporation
DC DC CONVERTER 15V 75W
Stokta var3660 pcs
90%
1
-
5A
21V
15V
-
-
-
3 kV
-
-
VE-J12
Bulk
Through Hole
VE-J00™ (75W)
-55°C ~ 100°C
2.28' L x 2.40' W x 0.50' H (57.9mm x 70.0mm x 12.7mm)
32V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
75 W
RFQ
PP10-12-15
TDK-Lambda Americas Inc
DC DC CONVERTER 15V 11W
Stokta var4720 pcs
-
1
-
700mA
9V
15V
-
-
-
-
-
-
-
-
Through Hole
PP (10W)
-20°C ~ 71°C (With Derating)
1.85" L x 1.65" W x 0.31" H (47.0mm x 42.0mm x 8.0mm)
18V
Isolated Module
Remote On/Off, OVP, SCP
ITE (Commercial)
4-DIP Module
-
11 W
RFQ
ZY7115LG-T2
Bel Power Solutions
DC DC CONVERTER 0.5-5.5V
Stokta var4580 pcs
-
1
-
15A
3V
0.5 ~ 5.5V
-
-
-
-
-
-
-
Tape & Reel (TR)
Surface Mount
Intelligent POL Converter
-40°C ~ 85°C
1.26" L x 0.39" W x 0.55" H (32.0mm x 10.0mm x 14.0mm)
13.2V
Non-Isolated PoL Module, Digital
-
ITE (Commercial)
Module
-
-
RFQ
CC025ACL-M
ABB Power Electronics Inc.
DC DC CONVERTER 5V +/-15V 25W
Stokta var4910 pcs
82%
3
Enable, Active High
5A, 830mA, 830mA
18V
5V
15V
-15V
-
500 V
-
-
-
Bulk
Through Hole
CC025 (25W)
-40°C ~ 100°C
2.80" L x 2.40" W x 0.50" H (71.1mm x 61.0mm x 12.7mm)
36V
Isolated Module
Remote On/Off, OCP, OVP
ITE (Commercial)
10-DIP Module
-
25 W
RFQ
VE-242-IU
Vicor Corporation
DC DC CONVERTER 15V 200W
Stokta var3920 pcs
90%
1
-
13.33A
55V
15V
-
-
-
3 kV
-
-
VE-242
Bulk
Through Hole
VE-200™ (200W)
-40°C ~ 85°C
4.60' L x 2.40' W x 0.50' H (116.8mm x 61.0mm x 12.7mm)
100V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
VE-261-IW
Vicor Corporation
DC DC CONVERTER 12V 100W
Stokta var4980 pcs
90%
1
-
8.33A
200V
12V
-
-
-
3 kV
-
-
VE-261
Bulk
Through Hole
VE-200™ (100W)
-40°C ~ 85°C
4.60' L x 2.40' W x 0.50' H (116.8mm x 61.0mm x 12.7mm)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
VE-220-CW
Vicor Corporation
DC DC CONVERTER 5V 100W
Stokta var135 pcs
90%
1
-
20A
21V
5V
-
-
-
3 kV
-
-
VE-220
Bulk
Through Hole
VE-200™ (100W)
-25°C ~ 85°C
4.60' L x 2.40' W x 0.50' H (116.8mm x 61.0mm x 12.7mm)
56V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
VI-B6H-CV
Vicor Corporation
DC DC CONVERTER 52V 150W
Stokta var4260 pcs
90%
1
-
2.88A
200V
52V
-
-
-
3 kV
-
-
VI-B6H
Bulk
Through Hole
VI-200™ (150W)
-25°C ~ 85°C
4.60" L x 2.40" W x 0.50" H (116.8mm x 61.0mm x 12.7mm)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VE-J73-MX
Vicor Corporation
DC DC CONVERTER 24V 75W
Stokta var5300 pcs
90%
1
-
3.13A
100V
24V
-
-
-
3 kV
-
-
VE-J73
Bulk
Through Hole
VE-J00™ (75W)
-55°C ~ 100°C
2.28" L x 2.40" W x 0.50" H (57.9mm x 70.0mm x 12.7mm)
375V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
75 W
RFQ
VE-214-EY
Vicor Corporation
DC DC CONVERTER 48V 50W
Stokta var3800 pcs
88%
1
-
1.04A
21V
48V
-
-
-
3 kV
-
-
VE-214
Bulk
Through Hole
VE-200™ (50W)
-10°C ~ 85°C
4.60" L x 2.40" W x 0.50" H (116.8mm x 61.0mm x 12.7mm)
32V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
50 W
RFQ
PPD1R5-48-1212
TDK-Lambda Americas Inc
DC DC CONVERTER +/-12V 1.44W
Stokta var4200 pcs
-
2
-
60mA, 60mA
32V
12V
-12V
-
-
-
-
-
-
-
Through Hole
PP (1.5W)
-20°C ~ 71°C (With Derating)
1.30" L x 0.83" W x 0.31" H (33.0mm x 21.0mm x 8.0mm)
63V
Isolated Module
OVP
ITE (Commercial)
5-DIP Module
-
1.44 W
RFQ
VI-J60-07
Vicor Corporation
VI-J60-07 300V/5V 75W SMD
Stokta var132 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-J60
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
SIP20C-05S2V5
Artesyn Embedded Power
DC DC CONVERTER 2.5V 15W
Stokta var4300 pcs
82%
1
-
6A
4.5V
2.5V
-
-
-
-
-
-
-
Bulk
Through Hole
SIP20C (20W)
-25°C ~ 85°C
2.50' L x 0.23' W x 0.55' H (63.5mm x 5.8mm x 14.0mm)
5.5V
Non-Isolated PoL Module
Remote On/Off, OTP, OVP, SCP, UVLO
ITE (Commercial)
11-SIP Module
-
15 W
RFQ
MI-J52-IA
Vicor Corporation
DC DC CONVERTER 15V 10W
Stokta var5010 pcs
90%
1
-
667mA
100V
15V
-
-
-
3 kV
-
-
MI-J52
Bulk
Through Hole
MI-J00™ (10W)
-40°C ~ 85°C
2.40" L x 2.28" W x 0.50" H (61.0mm x 57.9mm x 12.7mm)
210V
Isolated Module
Remote On/Off, OCP, OTP, OVP
ITE (Commercial)
9-DIP Module
-
10 W
RFQ
PKV3313PI
Flex Power Modules
DC DC CONVERTER 12V 3W
Stokta var1770 pcs
82%
1
-
250mA
9V
12V
-
-
-
1.5 kV
CB, CSA, IEC, TUV, UL
62368-1
PKV331
Tray
Through Hole
PKV (3W)
-40°C ~ 95°C (With Derating)
1.25" L x 0.80" W x 0.42" H (31.8mm x 20.3mm x 10.7mm)
36V
Isolated Module
-
ITE (Commercial)
24-DIP Module, 10 Leads
-
3 W
RFQ
VI-B5L-IV
Vicor Corporation
DC DC CONVERTER 28V 150W
Stokta var4260 pcs
90%
1
-
5.36A
100V
28V
-
-
-
3 kV
-
-
VI-B5L
Bulk
Through Hole
VI-200™ (150W)
-40°C ~ 85°C
4.60' L x 2.40' W x 0.50' H (116.8mm x 61.0mm x 12.7mm)
200V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VE-2W3-MV
Vicor Corporation
DC DC CONVERTER 24V 150W
Stokta var4080 pcs
90%
1
-
6.25A
18V
24V
-
-
-
3 kV
-
-
VE-2W3
Bulk
Through Hole
VE-200™ (150W)
-55°C ~ 85°C
4.60" L x 2.40" W x 0.50" H (116.8mm x 61.0mm x 12.7mm)
36V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
CCK-1203SF
TDK-Lambda Americas Inc
DC DC CONVERTER 3.3V 1.32W
Stokta var5350 pcs
70%
1
-
400mA
9V
3.3V
-
-
-
500 V
-
-
-
Bulk
Through Hole
CCK (1.5W)
-20°C ~ 70°C (With Derating)
1.10" L x 0.63" W x 0.31" H (27.9mm x 16.0mm x 7.9mm)
18V
Isolated Module
OCP
ITE (Commercial)
6-DIP Module
-
1.32 W
RFQ
PP1R5-48-5
TDK-Lambda Americas Inc
DC DC CONVERTER 5V 1.5W
Stokta var4210 pcs
-
1
-
300mA
36V
5V
-
-
-
-
-
-
-
-
Through Hole
PP (1.5W)
-20°C ~ 71°C (With Derating)
1.30" L x 0.83" W x 0.31" H (33.0mm x 21.0mm x 8.0mm)
72V
Isolated Module
Remote On/Off, OVP
ITE (Commercial)
4-DIP Module
-
1.5 W
RFQ
MI-J70-01
Vicor Corporation
MI-J70-01 165V/5V 50W
Stokta var5190 pcs
-
-
-
-
-
-
-
-
-
-
-
-
MI-J70
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-J12-EZ
Vicor Corporation
DC DC CONVERTER 15V 25W
Stokta var5260 pcs
88%
1
-
1.67A
21V
15V
-
-
-
3 kV
-
-
VE-J12
Bulk
Through Hole
VE-J00™ (25W)
-10°C ~ 100°C
2.28" L x 2.40" W x 0.50" H (57.9mm x 70.0mm x 12.7mm)
32V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ