PP6-48-12
TDK-Lambda Americas Inc
DC DC CONVERTER 12V 6W
Nan stok5290 pcs
-
1
-
500mA
36V
12V
-
-
-
-
-
-
-
-
Through Hole
PP (6W)
-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)
72V
Isolated Module
Remote On/Off, OVP
ITE (Commercial)
4-DIP Module
-
6 W
RFQ
VE-J61-EZ
Vicor Corporation
DC DC CONVERTER 12V 25W
Nan stok141 pcs
88%
1
-
2.08A
200V
12V
-
-
-
3 kV
-
-
VE-J61
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)
400V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
PC1R5-48-5
TDK-Lambda Americas Inc
DC DC CONVERTER 5V 1.5W
Nan stok5480 pcs
-
1
-
300mA
36V
5V
-
-
-
-
-
-
-
-
Through Hole
PC
-20°C ~ 70°C (With Derating)
1.08" L x 0.61" W x 0.31" H (27.5mm x 15.5mm x 7.8mm)
72V
Isolated Module
OCP
ITE (Commercial)
6-DIP Module
-
1.5 W
RFQ
VE-240-CY
Vicor Corporation
DC DC CONVERTER 5V 50W
Nan stok4700 pcs
90%
1
-
10A
55V
5V
-
-
-
3 kV
-
-
VE-240
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
VE-261-IV
Vicor Corporation
DC DC CONVERTER 12V 150W
Nan stok50 pcs
90%
1
-
12.5A
200V
12V
-
-
-
3 kV
-
-
VE-261
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)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VE-JN3-EZ
Vicor Corporation
DC DC CONVERTER 24V 25W
Nan stok114 pcs
88%
1
-
1.04A
36V
24V
-
-
-
3 kV
-
-
VE-JN3
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)
76V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
VI-BN1-EV
Vicor Corporation
DC DC CONVERTER 12V 150W
Nan stok5280 pcs
88%
1
-
12.5A
36V
12V
-
-
-
3 kV
-
-
VI-BN1
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)
76V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VE-J40-MX
Vicor Corporation
DC DC CONVERTER 5V 75W
Nan stok5150 pcs
90%
1
-
15A
55V
5V
-
-
-
3 kV
-
-
VE-J40
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)
100V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
75 W
RFQ
LW010A
ABB Power Electronics Inc.
DC DC CONVERTER 5V 10W
Nan stok3630 pcs
81%
1
-
2A
36V
5V
-
-
-
1.5 kV
-
-
-
Bulk
Through Hole
LW010 (10W)
-40°C ~ 105°C
2.00' L x 1.00' W x 0.40' H (50.8mm x 25.4mm x 10.2mm)
75V
Isolated Module
OCP, OVP, UVLO
ITE (Commercial)
6-DIP Module
-
10 W
RFQ
VI-262-EU-14
Vicor Corporation
VI-262-EU-14 300/15V 200W SOFT
Nan stok3760 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-262
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-J6Z-IX
Vicor Corporation
DC DC CONVERTER 2V 30W
Nan stok5090 pcs
90%
1
-
15A
200V
2V
-
-
-
3 kV
-
-
VE-J6Z
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)
400V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
30 W
RFQ
VE-JT4-MY
Vicor Corporation
DC DC CONVERTER 48V 50W
Nan stok5430 pcs
90%
1
-
1.04A
66V
48V
-
-
-
3 kV
-
-
VE-JT4
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)
160V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
50 W
RFQ
VE-221-CY
Vicor Corporation
DC DC CONVERTER 12V 50W
Nan stok4660 pcs
90%
1
-
4.17A
21V
12V
-
-
-
3 kV
-
-
VE-221
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)
56V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
50 W
RFQ
ZL9117MAIRZ-T
Renesas Electronics America Inc
DC DC CONVERTER 0.6-3.6V 61W
Nan stok3850 pcs
-
1
-
17A
4.5V
0.6 ~ 3.6V
-
-
-
-
-
-
ZL9117
Tape & Reel (TR)
Surface Mount
ZL9117M
-40°C ~ 85°C
0.59' L x 0.59' W x 0.14' H (15.0mm x 15.0mm x 3.5mm)
13.2V
Non-Isolated PoL Module, Digital
OCP, OTP, OVP, UVLO
ITE (Commercial)
21-PowerBQFN Module
21-QFN (15x15)
-
RFQ
VI-810424B
Vicor Corporation
DC DC CONVERTER
Nan stok149 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-240-EU
Vicor Corporation
DC DC CONVERTER 5V 200W
Nan stok5110 pcs
88%
1
-
40A
55V
5V
-
-
-
3 kV
-
-
VE-240
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)
100V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
200 W
RFQ
X15-48S03/P
TDK-Lambda Americas Inc
DC DC CONVERTER 3.3V 10W
Nan stok4390 pcs
79%
1
-
3A
36V
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)
75V
Isolated Module
Remote On/Off, OVP, SCP
ITE (Commercial)
6-DIP Module
-
10 W
RFQ
VE-JNY-IZ
Vicor Corporation
DC DC CONVERTER 3.3V 17W
Nan stok4630 pcs
90%
1
-
5A
36V
3.3V
-
-
-
3 kV
-
-
VE-JNY
Bulk
Through Hole
VE-J00™ (25W)
-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
-
17 W
RFQ
VE-243-EY
Vicor Corporation
DC DC CONVERTER 24V 50W
Nan stok5430 pcs
88%
1
-
2.08A
55V
24V
-
-
-
3 kV
-
-
VE-243
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)
100V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
50 W
RFQ
VE-J41-EY
Vicor Corporation
DC DC CONVERTER 12V 50W
Nan stok144 pcs
88%
1
-
4.17A
55V
12V
-
-
-
3 kV
-
-
VE-J41
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)
100V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
50 W
RFQ
TPS8268090SIPR
Texas Instruments
DC DC CONVERTER 0.9V
Nan stok18844 pcs
90%
1
-
1.6A
2.5V
0.9V
-
-
-
-
-
-
TPS8268090
Tape & Reel (TR)
Surface Mount
MicroSip™
-40°C ~ 85°C
0.11" L x 0.09" W x 0.04" H (2.9mm x 2.3mm x 1.0mm)
5.5V
Non-Isolated PoL Module
Remote On/Off, OCP, OTP, UVLO
ITE (Commercial)
9-SMD Module
9-USIP
-
RFQ
VE-2W0-MV
Vicor Corporation
DC DC CONVERTER 5V 150W
Nan stok4290 pcs
90%
1
-
30A
18V
5V
-
-
-
3 kV
-
-
VE-2W0
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
VE-26Z-IU
Vicor Corporation
DC DC CONVERTER 2V 80W
Nan stok4780 pcs
90%
1
-
80A
200V
2V
-
-
-
3 kV
-
-
VE-26Z
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
-
80 W
RFQ
VI-BW0-MV
Vicor Corporation
DC DC CONVERTER 5V 150W
Nan stok41 pcs
90%
1
-
30A
18V
5V
-
-
-
3 kV
-
-
VI-BW0
Bulk
Through Hole
VI-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
VE-2T4-MY
Vicor Corporation
DC DC CONVERTER 48V 50W
Nan stok5330 pcs
90%
1
-
1.04A
66V
48V
-
-
-
3 kV
-
-
VE-2T4
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)
160V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
50 W
RFQ
VI-BNH-CU
Vicor Corporation
DC DC CONVERTER 52V 200W
Nan stok5270 pcs
90%
1
-
3.85A
36V
52V
-
-
-
3 kV
-
-
VI-BNH
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
VI-2T4-04
Vicor Corporation
VI-2T4-04 122V/48V 168W S
Nan stok4820 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-2T4
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-210-EV
Vicor Corporation
DC DC CONVERTER 5V 150W
Nan stok122 pcs
88%
1
-
30A
21V
5V
-
-
-
3 kV
-
-
VE-210
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)
32V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
VI-2T2-01
Vicor Corporation
VI-2T2-01 110V/15V 150W
Nan stok70 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-2T2
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
PH300S48-5
TDK-Lambda Americas Inc
DC DC CONVERTER 5V 250W
Nan stok4360 pcs
-
1
-
50A
36V
5V
-
-
-
-
-
-
-
-
Through Hole
PH-S (300W)
-20°C ~ 100°C
3.39" L x 1.61" W x 0.50" H (86.1mm x 40.9mm x 12.7mm)
76V
Isolated Module
Remote On/Off, OCP, OTP, OVP
ITE (Commercial)
Module
-
250 W
RFQ
VE-J04-MZ
Vicor Corporation
DC DC CONVERTER 48V 25W
Nan stok3850 pcs
90%
1
-
521mA
10V
48V
-
-
-
3 kV
-
-
VE-J04
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)
20V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ
PMC8818TS
Flex Power Modules
DC DC CONVERTER 0.75-5.5V 88W
Nan stok3115 pcs
94.90%
1
Enable, Active High
16A
8.3V
0.75 ~ 5.5V
-
-
-
-
CB, CSA, IEC, TUV, UL
62368-1
PMC881
Tape & Reel (TR)
Surface Mount
PMC 8818
-45°C ~ 115°C (With Derating)
1.30" L x 0.53" W x 0.32" H (33.0mm x 13.5mm x 8.3mm)
16V
Non-Isolated PoL Module
Adjustable Output, Remote On/Off, Remote Sense
ITE (Commercial)
6-SMD Module
-
88 W
RFQ
VE-J63-IW
Vicor Corporation
DC DC CONVERTER 24V 100W
Nan stok71 pcs
90%
1
-
4.17A
200V
24V
-
-
-
3 kV
-
-
VE-J63
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
PPD3-12-1515
TDK-Lambda Americas Inc
DC DC CONVERTER +/-15V 3W
Nan stok4880 pcs
-
2
-
100mA, 100mA
8V
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)
16.5V
Isolated Module
OVP
ITE (Commercial)
5-DIP Module
-
3 W
RFQ
VE-J03-CX
Vicor Corporation
DC DC CONVERTER 24V 75W
Nan stok114 pcs
90%
1
-
3.13A
10V
24V
-
-
-
3 kV
-
-
VE-J03
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
VE-272-IY
Vicor Corporation
DC DC CONVERTER 15V 50W
Nan stok4640 pcs
90%
1
-
3.33A
100V
15V
-
-
-
3 kV
-
-
VE-272
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)
375V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
50 W
RFQ
ATH15T033-9SJ
Artesyn Embedded Power
DC DC CONVERTER 0.8-2.5V 66W
Nan stok5310 pcs
93%
1
-
15A
3V
0.8 ~ 2.5V
-
-
-
-
-
-
-
Tray
Surface Mount
ATH15 (66W)
-40°C ~ 85°C
1.37" L x 0.62" W x 0.38" H (34.8mm x 15.8mm x 9.6mm)
3.6V
Non-Isolated PoL Module
Remote On/Off, OCP, UVLO
ITE (Commercial)
10-SMD Module
-
66 W
RFQ
VE-JN1-EY
Vicor Corporation
DC DC CONVERTER 12V 50W
Nan stok109 pcs
88%
1
-
4.17A
36V
12V
-
-
-
3 kV
-
-
VE-JN1
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)
76V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
50 W
RFQ
QHW100Y1
ABB Power Electronics Inc.
DC DC CONVERTER 1.8V 36W
Nan stok5090 pcs
82%
1
Enable, Active Low
20A
36V
1.8V
-
-
-
1.5 kV
-
-
QWH100
Bulk
Through Hole
QHW (100W)
-40°C ~ 100°C
2.28" L x 1.45" W x 0.50" H (57.9mm x 36.8mm x 12.7mm)
75V
Isolated Module
Remote On/Off, OCP, OTP, OVP
ITE (Commercial)
8-DIP Module
-
36 W
RFQ
LW010CL
ABB Power Electronics Inc.
DC DC CONVERTER +/-15V 10W
Nan stok5080 pcs
80%
2
-
330mA, 330mA
36V
15V
-15V
-
-
1.5 kV
-
-
-
Bulk
Through Hole
LW010 (10W)
-40°C ~ 105°C
2.00' L x 1.00' W x 0.40' H (50.8mm x 25.4mm x 10.2mm)
75V
Isolated Module
OCP, OVP, UVLO
ITE (Commercial)
6-DIP Module
-
10 W
RFQ
VI-B54-MW
Vicor Corporation
DC DC CONVERTER 48V 100W
Nan stok33 pcs
90%
1
-
2.08A
100V
48V
-
-
-
3 kV
-
-
VI-B54
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)
200V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
PTH03010YAH
Texas Instruments
DC DC CONVERTER 0.55-1.8V
Nan stok4480 pcs
88%
1
-
15A
2.95V
0.55 ~ 1.8V
-
-
-
-
-
-
PTH03
Tray
Through Hole
PTH03010Y
-40°C ~ 85°C
1.37' L x 0.62' W x 0.35' H (34.8mm x 15.7mm x 8.9mm)
3.65V
Non-Isolated PoL Module
-
ITE (Commercial)
10-DIP Module
-
-
RFQ
VE-221-MX
Vicor Corporation
DC DC CONVERTER 12V 75W
Nan stok4250 pcs
90%
1
-
6.25A
21V
12V
-
-
-
3 kV
-
-
VE-221
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-BW3-IW
Vicor Corporation
DC DC CONVERTER 24V 100W
Nan stok5270 pcs
90%
1
-
4.17A
18V
24V
-
-
-
3 kV
-
-
VI-BW3
Bulk
Through Hole
VI-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)
36V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
MI-B2L-MW
Vicor Corporation
MI-B2L-MW 28V/28V 100W
Nan stok3980 pcs
-
-
-
-
-
-
-
-
-
-
-
-
MI-B2L
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-2N0-CW
Vicor Corporation
DC DC CONVERTER 5V 100W
Nan stok3870 pcs
90%
1
-
20A
36V
5V
-
-
-
3 kV
-
-
VE-2N0
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)
76V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
VE-262-EW
Vicor Corporation
DC DC CONVERTER 15V 100W
Nan stok4690 pcs
88%
1
-
6.67A
200V
15V
-
-
-
3 kV
-
-
VE-262
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)
400V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
AXH010A0F9-SR
ABB Power Electronics Inc.
DC DC CONVERTER 3.3V 33W
Nan stok5470 pcs
95%
1
Enable, Active Low
10A
3V
3.3V
-
-
-
-
-
-
-
Tape & Reel (TR)
Through Hole
Austin Lynx™
-40°C ~ 85°C
2.00" L x 0.32" W x 0.50" H (50.8mm x 8.1mm x 12.7mm)
5.5V
Non-Isolated PoL Module
Remote On/Off, OCP, OTP
ITE (Commercial)
11-SIP Module
-
33 W
RFQ
PC6-24-12
TDK-Lambda Americas Inc
DC DC CONVERTER 12V 6W
Nan stok4240 pcs
-
1
-
500mA
18V
12V
-
-
-
-
-
-
-
-
Through Hole
PC
-20°C ~ 70°C (With Derating)
1.60" L x 1.00" W x 0.33" H (40.6mm x 25.4mm x 8.5mm)
36V
Isolated Module
Remote On/Off, OCP
ITE (Commercial)
7-DIP Module
-
6 W
RFQ
VE-J43-CZ
Vicor Corporation
DC DC CONVERTER 24V 25W
Nan stok145 pcs
90%
1
-
1.04A
55V
24V
-
-
-
3 kV
-
-
VE-J43
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)
100V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
25 W
RFQ