VE-J34-MW
Vicor Corporation
DC DC CONVERTER 48V 100W
I lager3820 pcs
90%
1
-
2.08A
42V
48V
-
-
-
3 kV
-
-
VE-J34
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)
60V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
100 W
RFQ
VI-BT0-CV
Vicor Corporation
DC DC CONVERTER 5V 150W
I lager4010 pcs
90%
1
-
10A
66V
5V
-
-
-
3 kV
-
-
VI-BT0
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)
160V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VI-201-26
Vicor Corporation
VI-201-26 12V/12V 75W
I lager4860 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-201
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-J31-IY
Vicor Corporation
DC DC CONVERTER 12V 50W
I lager76 pcs
90%
1
-
4.17A
42V
12V
-
-
-
3 kV
-
-
VE-J31
Bulk
Through Hole
VE-J00™ (50W)
-40°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
-
50 W
RFQ
VE-J6L-MZ
Vicor Corporation
DC DC CONVERTER 28V 25W
I lager4980 pcs
90%
1
-
893mA
200V
28V
-
-
-
3 kV
-
-
VE-J6L
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)
400V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
VE-912494B
Vicor Corporation
C 40/ 80/ 53 15V/ 28.3A
I lager58 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-211-IV
Vicor Corporation
DC DC CONVERTER 12V 150W
I lager4180 pcs
90%
1
-
12.5A
21V
12V
-
-
-
3 kV
-
-
VE-211
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)
32V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VE-254-IW
Vicor Corporation
DC DC CONVERTER 48V 100W
I lager5010 pcs
90%
1
-
2.08A
100V
48V
-
-
-
3 kV
-
-
VE-254
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)
200V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
CXA20-48D05J
Artesyn Embedded Power
DC DC CONVERTER +/-5V 20W
I lager3620 pcs
84%
2
-
2A, 2A
18V
5V
-5V
-
-
1.5 kV
-
-
-
Bulk
Through Hole
CXA20 (20W)
-40°C ~ 60°C
2.00' L x 1.60' W x 0.41' H (50.8mm x 40.6mm x 10.5mm)
75V
Isolated Module
Remote On/Off, OCP, OTP, OVP, SCP, UVLO
ITE (Commercial)
8-DIP Module, 7 Leads
-
20 W
RFQ
VE-J31-MW
Vicor Corporation
DC DC CONVERTER 12V 100W
I lager3740 pcs
90%
1
-
8.33A
42V
12V
-
-
-
3 kV
-
-
VE-J31
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)
60V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
100 W
RFQ
AK60A-024L-050F10G
Artesyn Embedded Power
DC DC CONVERTER 5V 50W
I lager4190 pcs
83%
1
-
10A
18V
5V
-
-
-
-
-
-
-
-
Through Hole
AK60A (60W)
-40°C ~ 100°C
2.40" L x 2.30" W x 0.50" H (61.0mm x 58.4mm x 12.7mm)
36V
Non-Isolated PoL Module
Remote On/Off, OCP, OVP, SCP
ITE (Commercial)
Module
-
50 W
RFQ
VE-J60-CZ
Vicor Corporation
DC DC CONVERTER 5V 25W
I lager110 pcs
90%
1
-
5A
200V
5V
-
-
-
3 kV
-
-
VE-J60
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)
400V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
VI-231-EU-BM
Vicor Corporation
VI-231-EU-BM 48V/15V 200W
I lager119 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-231
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-JN3-EW
Vicor Corporation
DC DC CONVERTER 24V 100W
I lager153 pcs
88%
1
-
4.17A
36V
24V
-
-
-
3 kV
-
-
VE-JN3
Bulk
Through Hole
VE-J00™ (100W)
-10°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
-
100 W
RFQ
VE-224-MY
Vicor Corporation
DC DC CONVERTER 48V 50W
I lager3820 pcs
90%
1
-
1.04A
21V
48V
-
-
-
3 kV
-
-
VE-224
Bulk
Through Hole
VE-200™ (50W)
-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
-
50 W
RFQ
PCD3-24-1212
TDK-Lambda Americas Inc
DC DC CONVERTER +/-12V 3W
I lager3610 pcs
-
2
-
125mA, 125mA
18V
12V
-12V
-
-
-
-
-
-
-
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)
36V
Isolated Module
OCP
ITE (Commercial)
6-DIP Module
-
3 W
RFQ
VI-711729B
Vicor Corporation
H 150/350/270 7.5V/ 13.3A
I lager105 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-J62-IW
Vicor Corporation
DC DC CONVERTER 15V 100W
I lager77 pcs
90%
1
-
6.67A
200V
15V
-
-
-
3 kV
-
-
VE-J62
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)
400V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
100 W
RFQ
VE-213-EU
Vicor Corporation
DC DC CONVERTER 24V 200W
I lager125 pcs
88%
1
-
8.33A
21V
24V
-
-
-
3 kV
-
-
VE-213
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)
32V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
VE-J12-EY
Vicor Corporation
DC DC CONVERTER 15V 50W
I lager5260 pcs
88%
1
-
3.33A
21V
15V
-
-
-
3 kV
-
-
VE-J12
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)
32V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
50 W
RFQ
VE-251-EY
Vicor Corporation
DC DC CONVERTER 12V 50W
I lager5170 pcs
88%
1
-
4.17A
100V
12V
-
-
-
3 kV
-
-
VE-251
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)
200V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
50 W
RFQ
VI-241-08
Vicor Corporation
VI-241-08 48V/12V 36W
I lager3960 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-241
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-JW4-MW
Vicor Corporation
DC DC CONVERTER 48V 100W
I lager4510 pcs
90%
1
-
2.08A
18V
48V
-
-
-
3 kV
-
-
VE-JW4
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)
36V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
100 W
RFQ
PT6465A
Texas Instruments
DC DC CONVERTER 1.5V
I lager4260 pcs
88%
1
-
14A
4.5V
1.5V
-
-
-
-
-
-
PT6465
Tray
Through Hole, Right Angle
Excalibur™ PT6460
-40°C ~ 85°C
-
5.5V
Non-Isolated PoL Module
-
ITE (Commercial)
12-SIP Module
-
-
RFQ
PTH05060YAZ
Artesyn Embedded Power
DC DC CONVERTER 0.55-1.8V 18W
I lager3960 pcs
86%
1
-
10A
4.5V
0.55 ~ 1.8V
-
-
-
-
-
-
-
Tray
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)
5.5V
Non-Isolated PoL Module
Remote On/Off, OCP, UVLO
ITE (Commercial)
10-SMD Module, 7 Leads
-
18 W
RFQ
VE-244-IV
Vicor Corporation
DC DC CONVERTER 48V 150W
I lager4250 pcs
90%
1
-
3.13A
55V
48V
-
-
-
3 kV
-
-
VE-244
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)
100V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VI-BNT-CU
Vicor Corporation
DC DC CONVERTER 6.5V 200W
I lager3980 pcs
90%
1
-
30.77A
36V
6.5V
-
-
-
3 kV
-
-
VI-BNT
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)
76V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
BXA30-48D05-F
Artesyn Embedded Power
DC DC CONVERTER +/-5V 30W
I lager4850 pcs
80%
2
-
2.5A, 2.5A
36V
5V
-5V
-
-
1.5 kV
-
-
-
Bulk
Through Hole
BXA30 (30W)
-25°C ~ 100°C
3.02" L x 2.41" W x 0.52" H (76.3mm x 61.1mm x 13.3mm)
75V
Isolated Module
Remote On/Off, OVP, SCP
ITE (Commercial)
8-DIP Module
-
30 W
RFQ
ZL9006MIRZ
Renesas Electronics America Inc
DC DC CONVERTER 0.6-3.3V 20W
I lager5100 pcs
-
1
-
6A
4.5V
0.6 ~ 3.3V
-
-
-
-
-
-
ZL9006
Tray
Surface Mount
ZL9006M
-40°C ~ 85°C
0.68' L x 0.45' W x 0.10' H (17.2mm x 11.5mm x 2.5mm)
13.2V
Non-Isolated PoL Module, Digital
OCP, OTP, OVP, UVLO
ITE (Commercial)
32-SMD Module
-
-
RFQ
VE-254-MV
Vicor Corporation
DC DC CONVERTER 48V 150W
I lager27 pcs
90%
1
-
3.13A
100V
48V
-
-
-
3 kV
-
-
VE-254
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)
200V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VE-JT4-CW
Vicor Corporation
DC DC CONVERTER 48V 100W
I lager110 pcs
90%
1
-
2.08A
66V
48V
-
-
-
3 kV
-
-
VE-JT4
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)
160V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
100 W
RFQ
VI-B6Z-IU
Vicor Corporation
DC DC CONVERTER 2V 80W
I lager3840 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
VE-JW0-MZ
Vicor Corporation
DC DC CONVERTER 5V 25W
I lager3730 pcs
90%
1
-
5A
18V
5V
-
-
-
3 kV
-
-
VE-JW0
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)
36V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
BXB75-48D3V3-2V5FH
Artesyn Embedded Power
DC DC CONVERTER 3.3V 2.5V 60W
I lager4000 pcs
74%
2
-
15A, 15A
36V
3.3V
2.5V
-
-
1.5 kV
-
-
-
Bulk
Through Hole
BXB75 (75W)
-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, UVLO
ITE (Commercial)
10-DIP Module
-
60 W
RFQ
VE-240-EW
Vicor Corporation
DC DC CONVERTER 5V 100W
I lager5090 pcs
88%
1
-
20A
55V
5V
-
-
-
3 kV
-
-
VE-240
Bulk
Through Hole
VE-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)
100V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
VE-26Y-IU
Vicor Corporation
DC DC CONVERTER 3.3V 132W
I lager57 pcs
90%
1
-
132A
200V
3.3V
-
-
-
3 kV
-
-
VE-26Y
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)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
132 W
RFQ
VE-J11-MY
Vicor Corporation
DC DC CONVERTER 12V 50W
I lager5380 pcs
90%
1
-
4.17A
21V
12V
-
-
-
3 kV
-
-
VE-J11
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)
32V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
50 W
RFQ
MI-J23-MZ
Vicor Corporation
DC DC CONVERTER 24V 25W
I lager4830 pcs
90%
1
-
1.04A
18V
24V
-
-
-
3 kV
-
-
MI-J23
Bulk
Through Hole
MI-J00™ (25W)
-55°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
AM80A-048L-033F50
Artesyn Embedded Power
DC DC CONVERTER 3.3V 240W
I lager4700 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
PTH03020WAST
Texas Instruments
DC DC CONVERTER 0.8-2.5V
I lager1238 pcs
95%
1
-
22A
2.95V
0.8 ~ 2.5V
-
-
-
-
-
-
PTH03020
Tape & Reel (TR)
Surface Mount
PTH03020W
-40°C ~ 85°C
1.50" L x 0.87" W x 0.38" H (38.1mm x 22.1mm x 9.7mm)
3.65V
Non-Isolated PoL Module
Remote On/Off, OCP, UVLO
ITE (Commercial)
10-SMD Module
-
-
RFQ
MI-J22-IA-S
Vicor Corporation
DC DC CONVERTER 15V 10W
I lager74 pcs
90%
1
-
667mA
18V
15V
-
-
-
3 kV
-
-
MI-J22
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)
50V
Isolated Module
Remote On/Off, OCP, OTP, OVP
ITE (Commercial)
9-DIP Module
-
10 W
RFQ
VE-J3Z-IX
Vicor Corporation
DC DC CONVERTER 2V 30W
I lager4260 pcs
90%
1
-
15A
42V
2V
-
-
-
3 kV
-
-
VE-J3Z
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)
60V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
30 W
RFQ
VE-JTR-IX
Vicor Corporation
DC DC CONVERTER 7.5V 75W
I lager5060 pcs
90%
1
-
10A
66V
7.5V
-
-
-
3 kV
-
-
VE-JTR
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)
160V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
75 W
RFQ
BMR4570104/001
Flex Power Modules
DC DC CONVERTER 12V 264W
I lager818 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
LES015ZG
Bel Power Solutions
DC DC CONVERTER 5V 15W
I lager4130 pcs
83%
1
Enable, Active High
3A
36V
5V
-
-
-
1.5 kV
-
-
-
Bulk
Through Hole
LES (15W)
-40°C ~ 100°C
2.00' L x 1.00' W x 0.40' H (50.8mm x 25.4mm x 10.2mm)
75V
Isolated Module
Remote On/Off, OCP, OVP, SCP
ITE (Commercial)
6-DIP Module
-
15 W
RFQ
VI-BW4-CW
Vicor Corporation
DC DC CONVERTER 48V 100W
I lager5370 pcs
90%
1
-
2.08A
18V
48V
-
-
-
3 kV
-
-
VI-BW4
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)
36V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
VE-JT2-CZ
Vicor Corporation
DC DC CONVERTER 15V 25W
I lager123 pcs
90%
1
-
1.67A
66V
15V
-
-
-
3 kV
-
-
VE-JT2
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)
160V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
PKM4511EPI
Flex Power Modules
DC DC CONVERTER 5V 50W
I lager4210 pcs
90.5%
1
Enable, Active Low
10A
36V
5V
-
-
-
1.5 kV
CB, CSA, IEC, TUV, UL
62368-1
-
Tray
Through Hole
PKM 4000E (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)
75V
Isolated Module
Adjustable Output, Remote On/Off, Remote Sense
ITE (Commercial)
Quarter Brick
Quarter Brick
50 W
RFQ
AXA005A0X-SR
ABB Power Electronics Inc.
DC DC CONVERTER 0.8-5.5V 27W
I lager3870 pcs
89%
1
Enable, Active Low
5A
10V
0.8 ~ 5.5V
-
-
-
-
-
-
-
Tape & Reel (TR)
Surface Mount
Austin MicroLynx™
-40°C ~ 85°C
0.80' L x 0.35' W x 0.29' H (20.3mm x 8.9mm x 7.2mm)
14V
Non-Isolated PoL Module
Remote On/Off, OCP, OTP, UVLO
ITE (Commercial)
5-SMD Module
-
27 W
RFQ
LW020A8
ABB Power Electronics Inc.
DC DC CONVERTER 5V 20W
I lager3680 pcs
81%
1
Enable, Active High
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