AA10U-048L-033S
Artesyn Embedded Power
DC DC CONVERTER 3.3V 10W
Trong kho5270 pcs
82%
1
-
2.42A
18V
3.3V
-
-
-
1.5 kV
-
-
-
Bulk
Through Hole
AA10U (10W)
-40°C ~ 75°C
2.00' L x 1.00' W x 0.38' H (50.8mm x 25.4mm x 9.7mm)
75V
Isolated Module
OVP, SCP
ITE (Commercial)
5-DIP Module
-
10 W
RFQ
VE-JW3-IW
Vicor Corporation
DC DC CONVERTER 24V 100W
Trong kho84 pcs
90%
1
-
4.17A
18V
24V
-
-
-
3 kV
-
-
VE-JW3
Bulk
Through Hole
VE-J00™ (100W)
-40°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
-
100 W
RFQ
VE-J43-MZ
Vicor Corporation
DC DC CONVERTER 24V 25W
Trong kho3970 pcs
90%
1
-
1.04A
55V
24V
-
-
-
3 kV
-
-
VE-J43
Bulk
Through Hole
VE-J00™ (25W)
-55°C ~ 100°C
2.28' L x 2.40' W x 0.50' H (57.9mm x 70.0mm x 12.7mm)
100V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
VI-710844B
Vicor Corporation
H 180/375/300 5V/ 20A
Trong kho88 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-224-MX
Vicor Corporation
DC DC CONVERTER 48V 75W
Trong kho5330 pcs
90%
1
-
1.56A
21V
48V
-
-
-
3 kV
-
-
VE-224
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)
56V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
VI-B6D-CU
Vicor Corporation
DC DC CONVERTER 85V 200W
Trong kho4020 pcs
90%
1
-
2.35A
200V
85V
-
-
-
3 kV
-
-
VI-B6D
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)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
VI-BNL-CW
Vicor Corporation
DC DC CONVERTER 28V 100W
Trong kho5320 pcs
90%
1
-
3.57A
36V
28V
-
-
-
3 kV
-
-
VI-BNL
Bulk
Through Hole
VI-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)
76V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
EXB30-48S3V3
Artesyn Embedded Power
DC DC CONVERTER 3.3V 26W
Trong kho4470 pcs
90%
1
Enable, Active High
8A
36V
3.3V
-
-
-
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
-
26 W
RFQ
HBD060ZGE-A8
Bel Power Solutions
DC DC CONVERTER 5V 3.3V 60W
Trong kho4830 pcs
79%
2
Enable, Active High
12A, 15A
34V
5V
3.3V
-
-
1.5 kV
-
-
-
Bulk
Through Hole
HBD (60W)
-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, OTP, OVP, SCP
ITE (Commercial)
10-DIP Module
-
60 W
RFQ
VE-211-MU
Vicor Corporation
DC DC CONVERTER 12V 200W
Trong kho4960 pcs
90%
1
-
16.67A
21V
12V
-
-
-
3 kV
-
-
VE-211
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)
32V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
LW020A1
ABB Power Electronics Inc.
DC DC CONVERTER 5V 20W
Trong kho3720 pcs
81%
1
Enable, Active Low
4A
36V
5V
-
-
-
1.5 kV
-
-
-
Bulk
Through Hole
LW020 (20W)
-40°C ~ 110°C
2.00' L x 2.00' W x 0.39' H (50.8mm x 50.8mm x 9.9mm)
75V
Isolated Module
Remote On/Off, OCP, OVP
ITE (Commercial)
8-DIP Module
-
20 W
RFQ
V24B28C200BS
Vicor Corporation
DC DC CONVERTER 28V 200W
Trong kho5350 pcs
87%
1
-
7.14A
18V
28V
-
-
-
3 kV
-
-
V24B28C200
Bulk
Through Hole
MINI (200W)
-20°C ~ 100°C
2.28' L x 2.20' W x 0.50' H (57.9mm x 55.9mm x 12.7mm)
36V
Isolated Module
OVP, UVLO
ITE (Commercial)
9-DIP Module
-
200 W
RFQ
VE-244-CY
Vicor Corporation
DC DC CONVERTER 48V 50W
Trong kho5100 pcs
90%
1
-
1.04A
55V
48V
-
-
-
3 kV
-
-
-
Bulk
Through Hole
VE-200™ (50W)
-25°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
-
50 W
RFQ
X15-24S12/N
TDK-Lambda Americas Inc
DC DC CONVERTER 12V 15W
Trong kho4030 pcs
76%
1
-
1.25A
18V
12V
-
-
-
1.5 kV
-
-
-
-
Through Hole
X15 (15W)
-40°C ~ 105°C (With Derating)
2.00" L x 1.00" W x 0.38" H (50.8mm x 25.4mm x 9.7mm)
36V
Isolated Module
Remote On/Off, OVP, SCP
ITE (Commercial)
6-DIP Module
-
15 W
RFQ
VE-251-EU
Vicor Corporation
DC DC CONVERTER 12V 200W
Trong kho122 pcs
88%
1
-
16.67A
100V
12V
-
-
-
3 kV
-
-
VE-251
Bulk
Through Hole
VE-200™ (200W)
-10°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
-
200 W
RFQ
VI-B6W-IU
Vicor Corporation
DC DC CONVERTER 5.5V 200W
Trong kho62 pcs
90%
1
-
36.36A
200V
5.5V
-
-
-
3 kV
-
-
VI-B6W
Bulk
Through Hole
VI-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)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
VE-J64-CY
Vicor Corporation
DC DC CONVERTER 48V 50W
Trong kho94 pcs
90%
1
-
1.04A
200V
48V
-
-
-
3 kV
-
-
VE-J64
Bulk
Through Hole
VE-J00™ (50W)
-25°C ~ 100°C
2.28' L x 2.40' W x 0.50' H (57.9mm x 70.0mm x 12.7mm)
400V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
50 W
RFQ
VI-B6Z-IU
Vicor Corporation
DC DC CONVERTER 2V 80W
Trong kho3840 pcs
90%
1
-
40A
200V
2V
-
-
-
3 kV
-
-
VI-B6Z
Bulk
Through Hole
VI-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)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
80 W
RFQ
MW005C
ABB Power Electronics Inc.
DC DC CONVERTER 15V 5W
Trong kho5070 pcs
82%
1
-
330mA
36V
15V
-
-
-
500 V
-
-
-
-
Through Hole
MW005 (5W)
-40°C ~ 85°C
2.00' L x 1.10' W x 0.46' H (50.8mm x 27.9mm x 11.7mm)
75V
Isolated Module
OCP, OVP
ITE (Commercial)
4-DIP Module
-
5 W
RFQ
VI-J01-33
Vicor Corporation
VI-J01-33 24V/8V 32W
Trong kho3790 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-J01
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-JT0-EY
Vicor Corporation
DC DC CONVERTER 5V 50W
Trong kho136 pcs
88%
1
-
10A
66V
5V
-
-
-
3 kV
-
-
VE-JT0
Bulk
Through Hole
VE-J00™ (50W)
-10°C ~ 100°C
2.28" L x 2.40" W x 0.50" H (57.9mm x 70.0mm x 12.7mm)
160V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
50 W
RFQ
QD48T033050-NCB0
Bel Power Solutions
DC DC CONVERTER 3.3V 5V 100W
Trong kho4000 pcs
88%
2
Enable, Active Low
15A, 10A
36V
3.3V
5V
-
-
2 kV
-
-
QD48T033050
Bulk
Through Hole
QD48
-40°C ~ 85°C
2.30' L x 1.45' W x 0.50' H (58.4mm x 36.8mm x 12.7mm)
75V
Isolated Module
Remote On/Off, OCP, OTP, OVP, UVLO
ITE (Commercial)
7-DIP Module, 1/4 Brick
-
100 W
RFQ
PMH8918LP
Flex Power Modules
DC DC CONVERTER 0.8-1.8V 32W
Trong kho5290 pcs
89.5%
1
Enable, Active Low
18A
10.8V
0.8 ~ 1.8V
-
-
-
-
CB, CSA, IEC, TUV, UL
62368-1
-
Tray
Through Hole
PMH 8000 (99W)
-40°C ~ 85°C (With Derating)
1.49" L x 0.87" W x 0.35" H (38.0mm x 22.1mm x 9.0mm)
13.2V
Non-Isolated PoL Module
Adjustable Output, Remote On/Off, Remote Sense
ITE (Commercial)
10-DIP Module
-
32 W
RFQ
VI-B51-CV
Vicor Corporation
DC DC CONVERTER 12V 150W
Trong kho3640 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
X10-24S03
TDK-Lambda Americas Inc
DC DC CONVERTER 3.3V 8W
Trong kho3710 pcs
78%
1
-
2.42A
18V
3.3V
-
-
-
1.5 kV
-
-
-
-
Through Hole
X10 (10W)
-40°C ~ 105°C (With Derating)
2.00" L x 1.00" W x 0.38" H (50.8mm x 25.4mm x 9.7mm)
36V
Isolated Module
Remote On/Off, OVP, SCP
ITE (Commercial)
6-DIP Module
-
8 W
RFQ
48IMR6-05-2
Bel Power Solutions
DC DC CONVERTER 5V 6W
Trong kho4130 pcs
82%
1
-
1A
36V
5V
-
-
-
500 V
-
-
-
Bulk
Through Hole
IMR (6W)
-10°C ~ 50°C
2.00' L x 2.00' W x 0.48' H (50.8mm x 50.8mm x 12.2mm)
72V
Isolated Module
OCP, SCP
ITE (Commercial)
5-DIP Module
-
6 W
RFQ
BM80A-300L-033F90
Artesyn Embedded Power
DC DC CONVERTER 3.3V 300W
Trong kho4920 pcs
-
1
-
90A
180V
3.3V
-
-
-
-
-
-
-
-
Through Hole
BM80A (300W)
-20°C ~ 85°C
4.60" L x 2.40" W x 0.50" H (116.8mm x 61.0mm x 12.7mm)
400V
Non-Isolated PoL Module
Remote On/Off, OTP, OVP
ITE (Commercial)
Module
-
300 W
RFQ
AM80A-048L-033F50
Artesyn Embedded Power
DC DC CONVERTER 3.3V 240W
Trong kho4700 pcs
-
1
-
50A
36V
3.3V
-
-
-
-
-
-
-
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
VE-JN2-CX
Vicor Corporation
DC DC CONVERTER 15V 75W
Trong kho4180 pcs
90%
1
-
5A
36V
15V
-
-
-
3 kV
-
-
VE-JN2
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)
76V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
75 W
RFQ
PPD1R5-5-1212
TDK-Lambda Americas Inc
DC DC CONVERTER +/-12V 1.44W
Trong kho3880 pcs
-
2
-
60mA, 60mA
4.5V
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)
7.2V
Isolated Module
OVP
ITE (Commercial)
5-DIP Module
-
1.44 W
RFQ
VI-BW3-06
Vicor Corporation
VI-BW3-06 24V / 24V 100W
Trong kho4430 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-BW3
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-2W3-CX
Vicor Corporation
DC DC CONVERTER 24V 75W
Trong kho97 pcs
90%
1
-
3.13A
18V
24V
-
-
-
3 kV
-
-
VE-2W3
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)
36V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
VE-233-CX
Vicor Corporation
DC DC CONVERTER 24V 75W
Trong kho5220 pcs
90%
1
-
3.13A
42V
24V
-
-
-
3 kV
-
-
VE-233
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)
60V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
PTH12060YAZT
Artesyn Embedded Power
DC DC CONVERTER 0.55-1.8V 18W
Trong kho5040 pcs
83%
1
-
10A
10.8V
0.55 ~ 1.8V
-
-
-
-
-
-
-
Tape & Reel (TR)
Surface Mount
PTHxx060Y (18W)
-40°C ~ 85°C
1.00' L x 0.62' W x 0.35' H (25.3mm x 15.8mm x 9.0mm)
13.2V
Non-Isolated PoL Module
Remote On/Off, OCP, UVLO
ITE (Commercial)
10-SMD Module, 7 Leads
-
18 W
RFQ
VE-J54-CX
Vicor Corporation
DC DC CONVERTER 48V 75W
Trong kho5170 pcs
90%
1
-
1.56A
100V
48V
-
-
-
3 kV
-
-
VE-J54
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)
200V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
75 W
RFQ
PC3-12-5
TDK-Lambda Americas Inc
DC DC CONVERTER 5V 3W
Trong kho4360 pcs
-
1
-
600mA
9V
5V
-
-
-
-
-
-
-
-
Through Hole
PC
-20°C ~ 70°C (With Derating)
1.09" L x 0.78" W x 0.33" H (27.8mm x 19.8mm x 8.5mm)
18V
Isolated Module
OCP
ITE (Commercial)
6-DIP Module
-
3 W
RFQ
PP1R5-5-12
TDK-Lambda Americas Inc
DC DC CONVERTER 12V 1.44W
Trong kho4150 pcs
-
1
-
120mA
4.5V
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)
7.2V
Isolated Module
Remote On/Off, OVP
ITE (Commercial)
4-DIP Module
-
1.44 W
RFQ
MC010A
ABB Power Electronics Inc.
DC DC CONVERTER 5V 10W
Trong kho3780 pcs
80%
1
-
2A
18V
5V
-
-
-
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
VE-911001B
Vicor Corporation
C 36/ 75/ 48 12V/ 22A
Trong kho5080 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
MI-J2Y-IZ
Vicor Corporation
DC DC CONVERTER 3.3V 25W
Trong kho94 pcs
90%
1
-
5A
18V
3.3V
-
-
-
3 kV
-
-
MI-J2Y
Bulk
Through Hole
MI-J00™ (25W)
-40°C ~ 85°C
2.40' L x 2.28' W x 0.50' H (61.0mm x 57.9mm x 12.7mm)
50V
Isolated Module
Remote On/Off, OCP, OTP, OVP
ITE (Commercial)
9-DIP Module
-
25 W
RFQ
VE-2N4-EV
Vicor Corporation
DC DC CONVERTER 48V 150W
Trong kho143 pcs
88%
1
-
3.13A
36V
48V
-
-
-
3 kV
-
-
VE-2N4
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)
76V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
AEV02C48
Artesyn Embedded Power
DC DC CONVERTER 15V 25W
Trong kho4610 pcs
86%
1
-
1.7A
36V
15V
-
-
-
500 V
-
-
-
Bulk
Through Hole
AEV02 (25W)
-25°C ~ 90°C
2.56" L x 1.97" W x 0.33" H (65.0mm x 50.0mm x 8.5mm)
72V
Isolated Module
Remote On/Off, OVP, SCP, UVLO
ITE (Commercial)
6-DIP Module
-
25 W
RFQ
VI-B6K-CU
Vicor Corporation
DC DC CONVERTER 40V 200W
Trong kho5070 pcs
90%
1
-
5A
200V
40V
-
-
-
3 kV
-
-
VI-B6K
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)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
VI-BW3-EV
Vicor Corporation
DC DC CONVERTER 24V 150W
Trong kho91 pcs
88%
1
-
6.25A
18V
24V
-
-
-
3 kV
-
-
VI-BW3
Bulk
Through Hole
VI-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)
36V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
PMN8118UWP
Flex Power Modules
DC DC CONVERTER 0.7-3.6V 108W
Trong kho2361 pcs
92.6%
1
Enable, Active Low
30A
5.5V
0.7 ~ 3.6V
-
-
-
-
CB, CSA, IEC, TUV, UL
62368-1
PMN811
Tray
Through Hole
PMN 8000 (108W)
-40°C ~ 85°C (With Derating)
1.37" L x 0.62" W x 0.33" H (34.8mm x 15.8mm x 8.5mm)
14V
Non-Isolated PoL Module
Adjustable Output, Remote On/Off, Remote Sense
ITE (Commercial)
14-DIP Module
-
108 W
RFQ
VI-B10-IU
Vicor Corporation
DC DC CONVERTER 5V 200W
Trong kho66 pcs
90%
1
-
40A
21V
5V
-
-
-
3 kV
-
-
VI-B10
Bulk
Through Hole
VI-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)
32V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
VI-B2L-EW
Vicor Corporation
DC DC CONVERTER 28V 100W
Trong kho3910 pcs
88%
1
-
3.57A
21V
28V
-
-
-
3 kV
-
-
VI-B2L
Bulk
Through Hole
VI-200™ (100W)
-10°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-910080B
Vicor Corporation
C 210/375/300 15V/ 26.7A
Trong kho3900 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VI-J24-04
Vicor Corporation
VI-J24-04 36V/55V 66W SMD
Trong kho4360 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-J24
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VI-BW0-CV
Vicor Corporation
DC DC CONVERTER 5V 150W
Trong kho126 pcs
90%
1
-
30A
18V
5V
-
-
-
3 kV
-
-
VI-BW0
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
-
150 W
RFQ