SIL06C-12SADJ-VJ
Artesyn Embedded Power
DC DC CONVERTER 0.9-5V 30W
В наличност5060 pcs
91%
1
-
6A
10.2V
0.9 ~ 5V
-
-
-
-
-
-
-
Tray
Through Hole
SIL06C (30W)
0°C ~ 80°C
1.20' L x 0.39' W x 0.61' H (30.5mm x 9.8mm x 15.5mm)
13.8V
Non-Isolated PoL Module
Remote On/Off, OCP, SCP
ITE (Commercial)
9-SIP Module
-
30 W
RFQ
VE-J02-CZ
Vicor Corporation
DC DC CONVERTER 15V 25W
В наличност3810 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
PC6-12-3.3
TDK-Lambda Americas Inc
DC DC CONVERTER 3.3V 4W
В наличност4360 pcs
-
1
-
1.2A
9V
3.3V
-
-
-
-
-
-
-
-
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)
18V
Isolated Module
Remote On/Off, OCP
ITE (Commercial)
7-DIP Module
-
4 W
RFQ
VI-B00-MX
Vicor Corporation
DC DC CONVERTER 5V 75W
В наличност4010 pcs
90%
1
-
15A
10V
5V
-
-
-
3 kV
-
-
VI-B00
Bulk
Through Hole
VI-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)
20V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
VI-254-CU-BM
Vicor Corporation
VI-254-CU-BM 150V/48V200W
В наличност69 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-254
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
SQE48T20120-NDBLG
Bel Power Solutions
DC DC CONVERTER 12V 240W
В наличност4110 pcs
94.2%
1
Enable, Active Low
20A
36V
12V
-
-
-
2.25 kV
-
-
-
Bulk
Through Hole
SQE48 (240W)
-40°C ~ 85°C
2.30' L x 0.90' W x 0.50' H (58.4mm x 22.8mm x 12.7mm)
75V
Intermediate Bus Converter
Remote On/Off, OCP, OTP, OVP, UVLO
ITE (Commercial)
Eighth Brick
-
240 W
RFQ
PTH03030WAZT
Texas Instruments
DC DC CONVERTER 0.8-2.5V 75W
В наличност1761 pcs
93%
1
-
30A
2.95V
0.8 ~ 2.5V
-
-
-
-
-
-
PTH03030
Tape & Reel (TR)
Surface Mount
PTH03030W
-40°C ~ 85°C
1.37" L x 1.12" W x 0.38" H (34.8mm x 28.5mm x 9.6mm)
3.65V
Non-Isolated PoL Module
Remote On/Off, OCP, OTP, UVLO
ITE (Commercial)
13-SMD Module
-
-
RFQ
VE-J34-EX
Vicor Corporation
DC DC CONVERTER 48V 75W
В наличност4270 pcs
88%
1
-
1.56A
42V
48V
-
-
-
3 kV
-
-
VE-J34
Bulk
Through Hole
VE-J00™ (75W)
-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
-
75 W
RFQ
VE-2T0-MX
Vicor Corporation
DC DC CONVERTER 5V 75W
В наличност4360 pcs
90%
1
-
15A
66V
5V
-
-
-
3 kV
-
-
VE-2T0
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)
160V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
VE-242-IX
Vicor Corporation
DC DC CONVERTER 15V 75W
В наличност4770 pcs
90%
1
-
5A
55V
15V
-
-
-
3 kV
-
-
VE-242
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)
100V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
AM80A-300L-240F10
Artesyn Embedded Power
DC DC CONVERTER 24V 240W
В наличност5320 pcs
-
1
-
10A
180V
24V
-
-
-
-
-
-
-
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)
400V
Non-Isolated PoL Module
Remote On/Off, OTP, OVP
ITE (Commercial)
Module
-
240 W
RFQ
PP6-24-15
TDK-Lambda Americas Inc
DC DC CONVERTER 15V 6W
В наличност3640 pcs
-
1
-
400mA
18V
15V
-
-
-
-
-
-
-
-
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)
36V
Isolated Module
Remote On/Off, OVP
ITE (Commercial)
4-DIP Module
-
6 W
RFQ
ATH15T033-9SJ
Artesyn Embedded Power
DC DC CONVERTER 0.8-2.5V 66W
В наличност5310 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
LAW005A
ABB Power Electronics Inc.
DC DC CONVERTER 5V 5W
В наличност3640 pcs
78%
1
-
1A
36V
5V
-
-
-
1.5 kV
-
-
-
Bulk
Through Hole
LAW005 (5W)
-25°C ~ 71°C
1.25' L x 0.80' W x 0.42' H (31.8mm x 20.3mm x 10.7mm)
75V
Isolated Module
OCP, OVP
ITE (Commercial)
Module
-
5 W
RFQ
PPD3-5-1212
TDK-Lambda Americas Inc
DC DC CONVERTER +/-12V 2.88W
В наличност5220 pcs
-
2
-
120mA, 120mA
4.5V
12V
-12V
-
-
-
-
-
-
-
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)
7.2V
Isolated Module
OVP
ITE (Commercial)
5-DIP Module
-
2.88 W
RFQ
VE-26J-EW
Vicor Corporation
DC DC CONVERTER 36V 100W
В наличност5200 pcs
88%
1
-
2.78A
200V
36V
-
-
-
3 kV
-
-
VE-26J
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
VI-B60-34
Vicor Corporation
VI-B60-34 300V/5V 150W
В наличност5360 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-B60
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-2W4-IV
Vicor Corporation
DC DC CONVERTER 48V 150W
В наличност5190 pcs
90%
1
-
3.13A
18V
48V
-
-
-
3 kV
-
-
VE-2W4
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)
36V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
150 W
RFQ
MI-271-IX
Vicor Corporation
DC DC CONVERTER 12V 75W
В наличност71 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-200-MX
Vicor Corporation
DC DC CONVERTER 5V 75W
В наличност3990 pcs
90%
1
-
15A
10V
5V
-
-
-
3 kV
-
-
VE-200
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)
20V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
VE-J22-CX
Vicor Corporation
DC DC CONVERTER 15V 75W
В наличност111 pcs
90%
1
-
5A
21V
15V
-
-
-
3 kV
-
-
VE-J22
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)
56V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
75 W
RFQ
VE-JT2-EW
Vicor Corporation
DC DC CONVERTER 15V 100W
В наличност4360 pcs
88%
1
-
6.67A
66V
15V
-
-
-
3 kV
-
-
VE-JT2
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)
160V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
100 W
RFQ
VI-B6B-CV
Vicor Corporation
DC DC CONVERTER 95V 150W
В наличност5000 pcs
90%
1
-
1.58A
200V
95V
-
-
-
3 kV
-
-
VI-B6B
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
LQS40A48-5V0AJ
Artesyn Embedded Power
DC DC CONVERTER 5V 200W
В наличност5230 pcs
92%
1
-
40A
36V
5V
-
-
-
2.25 kV
-
-
-
Tray
Through Hole
LQS (200W)
-40°C ~ 85°C
-
75V
Isolated Module
Remote On/Off, OTP, OVP, SCP, UVLO
ITE (Commercial)
8-DIP Module, 1/4 Brick
-
200 W
RFQ
EXA40-48S05
Artesyn Embedded Power
DC DC CONVERTER 4.5-5.5V 40W
В наличност4160 pcs
91%
1
-
8A
36V
4.5 ~ 5.5V
-
-
-
-
-
-
-
-
Through Hole
EXA40 (40W)
-40°C ~ 70°C
2.20" L x 2.20" W x 0.35" H (55.9mm x 55.9mm x 8.9mm)
75V
Non-Isolated PoL Module
Remote On/Off, OTP, OVP, SCP, UVLO
ITE (Commercial)
8-DIP Module, 6 Leads
-
40 W
RFQ
VI-B6V-CV
Vicor Corporation
DC DC CONVERTER 5.8V 150W
В наличност5440 pcs
90%
1
-
25.86A
200V
5.8V
-
-
-
3 kV
-
-
VI-B6V
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
PKR4910ASI
Flex Power Modules
DC DC CONVERTER 3.3V 10W
В наличност3790 pcs
80%
1
Enable, Active Low
3A
36V
3.3V
-
-
-
1.5 kV
CB, CSA, IEC, TUV, UL
62368-1
PKR491
Tape & Reel (TR)
Surface Mount
PKR 4000A (15W)
-45°C ~ 110°C (With Derating)
1.88" L x 1.11" W x 0.31" H (47.8mm x 28.1mm x 8.0mm)
75V
Isolated Module
Adjustable Output, Remote On/Off
ITE (Commercial)
18-SMD Module
-
10 W
RFQ
VE-2N4-EY
Vicor Corporation
DC DC CONVERTER 48V 50W
В наличност4200 pcs
88%
1
-
1.04A
36V
48V
-
-
-
3 kV
-
-
VE-2N4
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)
76V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
50 W
RFQ
VE-2N0-CY
Vicor Corporation
DC DC CONVERTER 5V 50W
В наличност138 pcs
90%
1
-
10A
36V
5V
-
-
-
3 kV
-
-
VE-2N0
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)
76V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
50 W
RFQ
PM30-24D15
TDK-Lambda Americas Inc
DC DC CONVERTER +/-15V 30W
В наличност5240 pcs
-
2
-
1A, 1A
18V
15V
-15V
-
-
700 V
-
-
-
-
Through Hole
PM
-40°C ~ 50°C
3.00" L x 2.50" W x 0.33" H (76.2mm x 63.5mm x 8.4mm)
36V
Isolated Module
OVP, SCP
ITE (Commercial)
9-DIP Module, 8 Leads
-
30 W
RFQ
VE-2N0-EW
Vicor Corporation
DC DC CONVERTER 5V 100W
В наличност5370 pcs
88%
1
-
20A
36V
5V
-
-
-
3 kV
-
-
VE-2N0
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)
76V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
VI-230-VX
Vicor Corporation
VI-230-VX 48V/5V 75W SMD
В наличност3910 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VI-230
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-B64-IU-BM
Vicor Corporation
DC DC CONVERTER
В наличност52 pcs
-
-
-
-
-
-
-
-
-
-
-
-
VE-B64
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
AM1L-0505S-FZ
aimtec
DC DC CONVERTER 5V 1W
В наличност5170 pcs
81%
1
-
200mA
4.5V
5V
-
-
-
1 kV
-
-
AM1L
Bulk
Surface Mount
AM1L-FZ (1W)
-40°C ~ 95°C
0.54" L x 0.33" W x 0.31" H (13.6mm x 8.4mm x 7.9mm)
5.5V
Isolated Module
-
ITE (Commercial)
8-SMD Module, 5 Leads
-
1 W
RFQ
VI-B6W-IU
Vicor Corporation
DC DC CONVERTER 5.5V 200W
В наличност62 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
V375A48T600BS2
Vicor Corporation
DC DC CONVERTER 48V 600W
В наличност4310 pcs
88.5%
1
-
12.5A
250V
48V
-
-
-
3 kV
-
-
V375A48T600
Bulk
Through Hole
Maxi (600W)
-40°C ~ 100°C
4.60' L x 2.20' W x 0.54' H (116.8mm x 55.9mm x 13.7mm)
425V
Isolated Module
OVP, UVLO
ITE (Commercial)
Full Brick
-
600 W
RFQ
VE-214-MW
Vicor Corporation
DC DC CONVERTER 48V 100W
В наличност5180 pcs
90%
1
-
2.08A
21V
48V
-
-
-
3 kV
-
-
VE-214
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)
32V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
100 W
RFQ
VE-2T0-CV
Vicor Corporation
DC DC CONVERTER 5V 150W
В наличност4060 pcs
90%
1
-
30A
66V
5V
-
-
-
3 kV
-
-
VE-2T0
Bulk
Through Hole
VE-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
LES20A24-3V3RSJ
Artesyn Embedded Power
DC DC CONVERTER 3.3V 100W
В наличност5280 pcs
90%
1
Enable, Active Low
20A
18V
3.3V
-
-
-
2.25 kV
-
-
-
Tray
Surface Mount
Typhoon (100W)
-40°C ~ 85°C
2.30' L x 0.90' W x 0.28' H (58.4mm x 22.9mm x 7.1mm)
36V
Isolated Module
Remote On/Off, OCP, OTP, OVP, SCP, UVLO
ITE (Commercial)
8-SMD Module, 1/8 Brick
-
100 W
RFQ
VE-J52-MW
Vicor Corporation
DC DC CONVERTER 15V 100W
В наличност3900 pcs
90%
1
-
6.67A
100V
15V
-
-
-
3 kV
-
-
VE-J52
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-J3Z-CW
Vicor Corporation
DC DC CONVERTER 2V 40W
В наличност3880 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
VE-274-IX
Vicor Corporation
DC DC CONVERTER 48V 75W
В наличност5260 pcs
90%
1
-
1.56A
100V
48V
-
-
-
3 kV
-
-
VE-274
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)
375V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
75 W
RFQ
AL60A-300L-120F09
Artesyn Embedded Power
DC DC CONVERTER 12V 120W
В наличност4210 pcs
85%
1
-
9A
180V
12V
-
-
-
-
-
-
-
-
Through Hole
AL60A (120W)
-
2.40' L x 2.30' W x 0.50' H (61.0mm x 58.4mm x 12.7mm)
400V
Isolated Module
Remote On/Off, OTP, OVP
ITE (Commercial)
Module
-
120 W
RFQ
VE-J40-MY
Vicor Corporation
DC DC CONVERTER 5V 50W
В наличност4450 pcs
90%
1
-
10A
55V
5V
-
-
-
3 kV
-
-
VE-J40
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)
100V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
50 W
RFQ
VE-233-EX
Vicor Corporation
DC DC CONVERTER 24V 75W
В наличност5090 pcs
88%
1
-
3.13A
42V
24V
-
-
-
3 kV
-
-
VE-233
Bulk
Through Hole
VE-200™ (75W)
-10°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
AK45C-048L-033F20HAN
Artesyn Embedded Power
DC DC CONVERTER 3.3V 100W
В наличност5300 pcs
86%
1
-
20A
36V
3.3V
-
-
-
-
-
-
-
Bulk
Through Hole
AK45C (100W)
-40°C ~ 100°C
2.30" L x 1.45" W x 0.50" H (58.4mm x 36.8mm x 12.7mm)
75V
Non-Isolated PoL Module
Remote On/Off, OCP, OTP, OVP, UVLO
ITE (Commercial)
10-DIP Module
-
100 W
RFQ
VI-810424B
Vicor Corporation
DC DC CONVERTER
В наличност149 pcs
-
-
-
-
-
-
-
-
-
-
-
-
-
Bulk
-
*
-
-
-
-
-
-
-
-
-
RFQ
VE-J51-CY
Vicor Corporation
DC DC CONVERTER 12V 50W
В наличност140 pcs
90%
1
-
4.17A
100V
12V
-
-
-
3 kV
-
-
VE-J51
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)
200V
Isolated Module
OCP, SCP
ITE (Commercial)
Half Brick
-
50 W
RFQ
VE-2N1-IY
Vicor Corporation
DC DC CONVERTER 12V 50W
В наличност3860 pcs
90%
1
-
4.17A
36V
12V
-
-
-
3 kV
-
-
VE-2N1
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)
76V
Isolated Module
OCP, OTP, OVP, SCP
ITE (Commercial)
Full Brick
-
50 W
RFQ
LQS50A48-1V5RENJ
Artesyn Embedded Power
DC DC CONVERTER 1.5V 200W
В наличност3610 pcs
89.5%
1
-
50A
36V
1.5V
-
-
-
2.25 kV
-
-
-
Tray
Through Hole
LQS (200W)
-40°C ~ 85°C
2.30' L x 1.45' W x 0.41' H (58.4mm x 36.8mm x 10.4mm)
75V
Isolated Module
Remote On/Off, OTP, OVP, SCP, UVLO
ITE (Commercial)
8-DIP Module, 1/4 Brick
-
200 W
RFQ