VE-210-MX
Vicor Corporation
DC DC CONVERTER 5V 75W
In stock3600 pcs
90%
1
-
15A
21V
5V
-
-
-
3 kV
-
-
VE-210
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)
32V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
VE-2N0-MU
Vicor Corporation
DC DC CONVERTER 5V 200W
In stock5400 pcs
90%
1
-
40A
36V
5V
-
-
-
3 kV
-
-
VE-2N0
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)
76V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
VE-J0L-CX
Vicor Corporation
DC DC CONVERTER 28V 75W
In stock94 pcs
90%
1
-
2.68A
10V
28V
-
-
-
3 kV
-
-
VE-J0L
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)
20V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
75 W
RFQ
VI-B6F-EU
Vicor Corporation
DC DC CONVERTER 72V 200W
In stock89 pcs
88%
1
-
2.78A
200V
72V
-
-
-
3 kV
-
-
VI-B6F
Bulk
Through Hole
VI-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)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
PTH04040WAZ
Artesyn Embedded Power
DC DC CONVERTER 0.8-2.5V 150W
In stock618 pcs
93%
1
-
60A
2.95V
0.8 ~ 2.5V
-
-
-
-
-
-
PTH04040
Tray
Surface Mount
PTH04040W (150W)
-40°C ~ 85°C
2.05" L x 1.05" W x 0.37" H (51.9mm x 26.5mm x 9.4mm)
5.5V
Non-Isolated PoL Module
Remote On/Off, OCP, OTP, UVLO
ITE (Commercial)
20-SMD Module
-
150 W
RFQ
VE-2T3-MV
Vicor Corporation
DC DC CONVERTER 24V 150W
In stock5090 pcs
90%
1
-
6.25A
66V
24V
-
-
-
3 kV
-
-
VE-2T3
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)
160V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VE-250-CX
Vicor Corporation
DC DC CONVERTER 5V 75W
In stock105 pcs
90%
1
-
15A
100V
5V
-
-
-
3 kV
-
-
VE-250
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)
200V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
MC005B
ABB Power Electronics Inc.
DC DC CONVERTER 12V 5W
In stock5210 pcs
81%
1
-
420mA
18V
12V
-
-
-
500 V
-
-
-
Bulk
Through Hole
MC005 (5W)
-40°C ~ 85°C
2.00' L x 1.10' W x 0.46' H (50.8mm x 27.9mm x 11.7mm)
36V
Isolated Module
OCP, OVP, SCP
ITE (Commercial)
4-DIP Module
-
5 W
RFQ
DAS50F24
Cosel USA, Inc.
DC DC CONVERTER 24V 50W
In stock4970 pcs
82%
1
-
2.1A
88V
24V
-
-
-
-
-
-
-
Box
Through Hole
DAS (50W)
-10°C ~ 85°C (With Derating)
4.53" L x 2.28" W x 0.50" H (115.0mm x 58.0mm x 12.7mm)
370V
Isolated PoE Module
-
ITE (Commercial)
12-DIP Module
-
50 W
RFQ
VE-263-CY
Vicor Corporation
DC DC CONVERTER 24V 50W
In stock82 pcs
90%
1
-
2.08A
200V
24V
-
-
-
3 kV
-
-
VE-263
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)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
50 W
RFQ
VE-271-MW
Vicor Corporation
DC DC CONVERTER 12V 100W
In stock3740 pcs
90%
1
-
8.33A
100V
12V
-
-
-
3 kV
-
-
VE-271
Bulk
Through Hole
VE-200™ (100W)
-55°C ~ 85°C
4.60" L x 2.40" W x 0.50" H (116.8mm x 61.0mm x 12.7mm)
375V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
SIL15C-05SADJ-H
Artesyn Embedded Power
DC DC CONVERTER 0.9-3.3V 50W
In stock4460 pcs
89%
1
-
15A
4.5V
0.9 ~ 3.3V
-
-
-
-
-
-
-
Bulk
Through Hole, Right Angle
SIL15C (75W)
0°C ~ 80°C
1.20' L x 1.10' W x 0.48' H (30.5mm x 27.9mm x 12.2mm)
5.5V
Non-Isolated PoL Module
Remote On/Off, OCP, SCP
ITE (Commercial)
13-SIP Module
-
50 W
RFQ
MI-J22-IY-03
Vicor Corporation
MI-J22-IY-03 28V/15V 50W
In stock91 pcs
-
-
-
-
-
-
-
-
-
-
-
-
MI-J22
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-J52-MY
Vicor Corporation
DC DC CONVERTER 15V 50W
In stock4620 pcs
90%
1
-
3.33A
100V
15V
-
-
-
3 kV
-
-
VE-J52
Bulk
Through Hole
VE-J00™ (50W)
-55°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
-
50 W
RFQ
VE-J61-CX
Vicor Corporation
DC DC CONVERTER 12V 75W
In stock129 pcs
90%
1
-
6.25A
200V
12V
-
-
-
3 kV
-
-
VE-J61
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)
400V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
75 W
RFQ
VE-JN3-IX
Vicor Corporation
DC DC CONVERTER 24V 75W
In stock65 pcs
90%
1
-
3.13A
36V
24V
-
-
-
3 kV
-
-
VE-JN3
Bulk
Through Hole
VE-J00™ (75W)
-40°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
VI-811762B
Vicor Corporation
M 180/375/300 6.8V/ 20A
In stock4890 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VI-711583B
Vicor Corporation
C 105/220/143 5.2V/ 16.1A
In stock4990 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
CCN-0512DF
TDK-Lambda Americas Inc
DC DC CONVERTER +/-12V 6W
In stock5480 pcs
76%
2
-
250mA, 250mA
4.5V
12V
-12V
-
-
500 V
-
-
-
Bulk
Through Hole
CCN (6W)
-20°C ~ 70°C (With Derating)
1.61" L x 1.02" W x 0.33" H (40.9mm x 25.9mm x 8.4mm)
9V
Isolated Module
OCP
ITE (Commercial)
7-DIP Module
-
6 W
RFQ
VE-JT1-CX
Vicor Corporation
DC DC CONVERTER 12V 75W
In stock118 pcs
90%
1
-
6.25A
66V
12V
-
-
-
3 kV
-
-
VE-JT1
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)
160V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
75 W
RFQ
VE-2T2-EY
Vicor Corporation
DC DC CONVERTER 15V 50W
In stock3680 pcs
88%
1
-
3.33A
66V
15V
-
-
-
3 kV
-
-
VE-2T2
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)
160V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
50 W
RFQ
PPD3-48-1515
TDK-Lambda Americas Inc
DC DC CONVERTER +/-15V 3W
In stock5180 pcs
-
2
-
100mA, 100mA
32V
15V
-15V
-
-
-
-
-
-
-
Through Hole
PP (3W)
-20°C ~ 71°C (With Derating)
1.85" L x 1.10" W x 0.31" H (47.0mm x 28.0mm x 8.0mm)
63V
Isolated Module
OVP
ITE (Commercial)
5-DIP Module
-
3 W
RFQ
VI-2N0-IV-08
Vicor Corporation
VI-2N0-IV-08 48V/5V 150W
In stock78 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-2N0
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VI-2WF-IV-B1
Vicor Corporation
DC DC CONVERTER 72V 150W
In stock56 pcs
90%
1
-
2.08A
18V
72V
-
-
-
3 kV
-
-
VI-2WF
Bulk
Through Hole
VI-200™ (150W)
-40°C ~ 85°C
4.60" L x 2.40" W x 1.07" H (116.8mm x 61.0mm x 27.1mm)
36V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
HBS050ZH-A
Bel Power Solutions
DC DC CONVERTER 12V 50W
In stock4780 pcs
85%
1
Enable, Active High
4.2A
34V
12V
-
-
-
1.5 kV
-
-
-
Bulk
Through Hole
HBS (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, SCP
ITE (Commercial)
9-DIP Module
-
50 W
RFQ
VE-J02-CZ
Vicor Corporation
DC DC CONVERTER 15V 25W
In stock3810 pcs
90%
1
-
1.67A
10V
15V
-
-
-
3 kV
-
-
VE-J02
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)
20V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
VE-220-IX
Vicor Corporation
DC DC CONVERTER 5V 75W
In stock3710 pcs
90%
1
-
15A
21V
5V
-
-
-
3 kV
-
-
VE-220
Bulk
Through Hole
VE-200™ (75W)
-40°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
VE-J21-MZ
Vicor Corporation
DC DC CONVERTER 12V 25W
In stock3620 pcs
90%
1
-
2.08A
21V
12V
-
-
-
3 kV
-
-
VE-J21
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)
56V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
VE-262-IY
Vicor Corporation
DC DC CONVERTER 15V 50W
In stock5490 pcs
90%
1
-
3.33A
200V
15V
-
-
-
3 kV
-
-
VE-262
Bulk
Through Hole
VE-200™ (50W)
-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
-
50 W
RFQ
SQ48S08060-NS00
Bel Power Solutions
DC DC CONVERTER 6V 48W
In stock3620 pcs
89%
1
Enable, Active Low
8A
36V
6V
-
-
-
2 kV
-
-
-
Bulk
Surface Mount
SemiQ™ SQ48
-40°C ~ 85°C
2.30" L x 0.90" W x 0.26" H (58.4mm x 22.9mm x 6.6mm)
75V
Isolated Module
Remote On/Off, OCP, OTP, OVP, UVLO
ITE (Commercial)
8-SMD Module, 1/8 Brick
-
48 W
RFQ
EXB50-48D05-3V3
Artesyn Embedded Power
DC DC CONVERTER 5V 3.3V 50W
In stock5440 pcs
89%
2
-
7.5A, 7.5A
36V
5V
3.3V
-
-
1.5 kV
-
-
EXB50
-
Through Hole
EXB50 (50W)
-40°C ~ 100°C
2.40" L x 2.28" W x 0.43" H (61.0mm x 57.9mm x 10.9mm)
75V
Isolated Module
OTP, OVP, SCP, UVLO
ITE (Commercial)
9-DIP Module, 8 Leads
-
50 W
RFQ
VE-J3Z-CW
Vicor Corporation
DC DC CONVERTER 2V 40W
In stock3880 pcs
90%
1
-
20A
42V
2V
-
-
-
3 kV
-
-
VE-J3Z
Bulk
Through Hole
VE-J00™ (100W)
-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
-
40 W
RFQ
VI-BTL-EV
Vicor Corporation
DC DC CONVERTER 28V 150W
In stock3790 pcs
88%
1
-
1.79A
66V
28V
-
-
-
3 kV
-
-
VI-BTL
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)
160V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VE-BNM-CU
Vicor Corporation
DC DC CONVERTER 10V 200W
In stock3990 pcs
90%
1
-
20A
36V
10V
-
-
-
3 kV
-
-
VE-BNM
Bulk
Through Hole
VE-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)
76V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
LTM4608EV#PBF
Linear Technology
LTM4608 - Power Module with Trac
In stock4100 pcs
-
1
-
8A
2.7V
0.6 ~ 5V
-
-
-
-
-
-
-
Bulk
Surface Mount
µModule®
-40°C ~ 85°C
0.59" L x 0.35" W x 0.12" H (15.0mm x 9.0mm x 3.0mm)
5.5V
Non-Isolated PoL Module
Adjustable Output
ITE (Commercial)
68-BLGA Module
68-LGA (15x9)
-
RFQ
VI-BWP-CV
Vicor Corporation
DC DC CONVERTER 13.8V 150W
In stock5360 pcs
90%
1
-
10.87A
18V
13.8V
-
-
-
3 kV
-
-
VI-BWP
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
VI-B7L-MW
Vicor Corporation
DC DC CONVERTER 28V 100W
In stock49 pcs
90%
1
-
3.57A
100V
28V
-
-
-
3 kV
-
-
VI-B7L
Bulk
Through Hole
VI-200™ (100W)
-55°C ~ 85°C
4.60" L x 2.40" W x 0.50" H (116.8mm x 61.0mm x 12.7mm)
375V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
VI-711320B
Vicor Corporation
H 18/ 36/ 24 2V/ 7A
In stock61 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
CCN-4805SF
TDK-Lambda Americas Inc
DC DC CONVERTER 5V 6W
In stock3660 pcs
80%
1
-
1.2A
36V
5V
-
-
-
500 V
-
-
-
Bulk
Through Hole
CCN (6W)
-20°C ~ 70°C (With Derating)
1.61" L x 1.02" W x 0.33" H (40.9mm x 25.9mm x 8.4mm)
72V
Isolated Module
OCP
ITE (Commercial)
7-DIP Module
-
6 W
RFQ
PKM2510EPI
Flex Power Modules
DC DC CONVERTER 3.3V 50W
In stock5150 pcs
89%
1
Enable, Active Low
15A
18V
3.3V
-
-
-
1.5 kV
CB, CSA, IEC, TUV, UL
62368-1
-
Tray
Through Hole
PKM 2000E (50W)
-40°C ~ 110°C (With Derating)
2.28" L x 1.45" W x 0.33" H (57.9mm x 36.8mm x 8.5mm)
36V
Isolated Module
Adjustable Output, Remote On/Off, Remote Sense
ITE (Commercial)
Quarter Brick
Quarter Brick
50 W
RFQ
BWS1205
Bel Power Solutions
DC DC CONVERTER 5V 3W
In stock5460 pcs
70%
1
-
500mA
9V
5V
-
-
-
500 V
-
-
-
Bulk
Through Hole
BWS (3W)
-25°C ~ 85°C
1.25' L x 0.80' W x 0.52' H (31.8mm x 20.3mm x 13.2mm)
18V
Isolated Module
SCP
ITE (Commercial)
24-DIP Module, 8 Leads
-
3 W
RFQ
SMT12F-05W3V3
Artesyn Embedded Power
DC DC CONVERTER 0.9-3.3V 31W
In stock4430 pcs
95%
1
-
12A
3V
0.9 ~ 3.3V
-
-
-
-
-
-
-
Tray
Surface Mount
SMT12F (31W)
-40°C ~ 85°C
0.63" L x 0.52" W x 0.31" H (16.0mm x 13.2mm x 7.9mm)
5.5V
Non-Isolated PoL Module
Remote On/Off, OTP, SCP
ITE (Commercial)
10-SMD Module
-
31 W
RFQ
CCK-1205SF
TDK-Lambda Americas Inc
DC DC CONVERTER 5V 1.5W
In stock4720 pcs
73%
1
-
300mA
9V
5V
-
-
-
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
-
1.5 W
RFQ
BMR4570104/001
Flex Power Modules
DC DC CONVERTER 12V 264W
In stock818 pcs
95.2%
1
Enable, Active Low
22A
36V
12V
-
-
-
2.25 kV
CB, CSA, IEC, TUV, UL
62368-1
BMR457
Tray
Through Hole
BMR457 (300W)
-40°C ~ 125°C (With Derating)
2.30" L x 0.89" W x 0.52" H (58.4mm x 22.7mm x 13.2mm)
75V
Intermediate Bus Converter, Digital
Adjustable Output, Baseplate, PMBus™, Remote On/Off, Remote Sense
ITE (Commercial)
Eighth Brick
Eighth Brick
264 W
RFQ
VE-J53-IX
Vicor Corporation
DC DC CONVERTER 24V 75W
In stock83 pcs
90%
1
-
3.13A
100V
24V
-
-
-
3 kV
-
-
VE-J53
Bulk
Through Hole
VE-J00™ (75W)
-40°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
X15-24S03/PT
TDK-Lambda Americas Inc
DC DC CONVERTER 3.3V 10W
In stock4390 pcs
77%
1
-
3A
18V
3.3V
-
-
-
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
-
10 W
RFQ
V72A36T400BN2
Vicor Corporation
DC DC CONVERTER 36V 400W
In stock4020 pcs
88%
1
-
11.11A
43V
36V
-
-
-
3 kV
-
-
V72A36T400
Bulk
Through Hole
Maxi (400W)
-40°C ~ 100°C
4.60' L x 2.20' W x 0.62' H (116.8mm x 55.9mm x 15.7mm)
110V
Isolated Module
OVP, UVLO
ITE (Commercial)
Full Brick
-
400 W
RFQ
X10-24S03
TDK-Lambda Americas Inc
DC DC CONVERTER 3.3V 8W
In stock3710 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
VE-J50-MW
Vicor Corporation
DC DC CONVERTER 5V 100W
In stock4190 pcs
90%
1
-
20A
100V
5V
-
-
-
3 kV
-
-
VE-J50
Bulk
Through Hole
VE-J00™ (100W)
-55°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
-
100 W
RFQ
VE-2W4-MX
Vicor Corporation
DC DC CONVERTER 48V 75W
In stock4640 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