Artesyn Embedded Power(4532)

Compare Image Name Manufacturer Pricing(USD) Quantity Weight(Kg) Size(LxWxH) Part Status Type Series Mount Mounting Type Operating Temperature Packaging Size / Dimension Moisture Sensitivity Level (MSL) Max Operating Temperature Min Operating Temperature Technology Height Seated (Max) RoHS Status Published Datasheet Package / Case Length Height Width Depth Number of Terminations Factory Lead Time Weight Number of Pins Pbfree Code ECCN Code Additional Feature Radiation Hardening Reach Compliance Code Number of Functions Power Rating Voltage - Input (Max) Max Input Voltage Feature Applications Surface Mount Max Power Dissipation Terminal Position Terminal Form Peak Reflow Temperature (Cel) Pin Count Time@Peak Reflow Temperature-Max (s) Qualification Status JESD-30 Code Max Output Current Min Input Voltage Output Power Output Voltage Output Current Isolation Voltage Power (Watts) Number of Outputs Voltage - Output 1 Current - Output 1 Voltage - Isolation Current - Output (Max) Input Voltage-Nom Trim/Adjustable Output Total Power Output-Max Voltage - Output 2 Isolation Efficiency Voltage - Input (Min) Control Features
ALD10F48-6L ALD10F48-6L Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module ALD15 (35W) Through Hole -40°C~85°C Tray 1.30Lx0.90W x 0.34 H 33.0mmx22.9mmx8.6mm 1 (Unlimited) HYBRID RoHS Compliant 2011 8-DIP Module, 1/16 Brick 33.02mm 22.86mm 8 unknown 1 75V Remote On/Off, OCP, OTP, OVP, UVLO ITE (Commercial) NO DUAL PIN/PEG NOT SPECIFIED NOT SPECIFIED R-XDMA-P8 35W 3.3V 1 3.3V 1.5kV 10A 48V YES 33W 90% 36V
ALD25K48-L ALD25K48-L Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module ALD25 (60W) Through Hole Through Hole -40°C~85°C Tray 1.30Lx0.90W x 0.35 H 33.0mmx22.9mmx8.8mm 1 (Unlimited) RoHS Compliant 8-DIP Module, 1/16 Brick 8.89mm 22.9mm 8 EAR99 No 75V Remote On/Off, OCP, OTP, OVP, UVLO ITE (Commercial) 30W 25A 30W 1.2V 25A 60W 1 25A 1.5kV Isolated 83% 36V
ALQ20B48N-6L ALQ20B48N-6L Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module ALQ (240W) Through Hole -40°C~85°C Bulk 2.28Lx1.45W x 0.36 H 28.0mmx36.8mmx9.1mm 1 (Unlimited) HYBRID 8-DIP Module, 1/4 Brick 8 EAR99 1 75V Remote On/Off, OCP, OTP, OVP, UVLO ITE (Commercial) NO DUAL PIN/PEG 8 Not Qualified R-XDMA-P8 12V 240W 1 12V 2.25kV 20A 48V YES 240W 93% 36V
AVE240-48S12B-4 AVE240-48S12B-4 Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module AVE240 (240W) Through Hole -40°C~85°C Tray 2.40Lx2.28W x 0.50 H 61.0mmx57.9mmx12.7mm 1 (Unlimited) 2014 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-ave24048s12b4-datasheets-7121.pdf 9-DIP Module, 1/2 Brick 75V Remote On/Off, OCP, OTP, OVP, UVLO ITE (Commercial) 240W 1 12V 1.5kV 20A 94% 36V
AVE300-48S1V8B-4 AVE300-48S1V8B-4 Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module AVE300 (198W) Through Hole -40°C~85°C Tray 2.40Lx2.28W x 0.37 H 61.0mmx57.9mmx9.5mm 1 (Unlimited) HYBRID RoHS Compliant 2014 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-ave30048s2v54-datasheets-7115.pdf 11-DIP Module, 1/2 Brick 11 DATA CAPTURED FROM 400 LFM 1 75V Remote On/Off, OCP, OTP, OVP, UVLO ITE (Commercial) NO DUAL PIN/PEG NOT SPECIFIED NOT SPECIFIED 1.8V 300W 1 1.8V 1.5kV 60A 48V YES 89% 36V
AVE240C-48S12-4L AVE240C-48S12-4L Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module AVE240 (240W) Through Hole -40°C~85°C Tray 2.40Lx2.28W x 0.50 H 61.0mmx57.9mmx12.7mm 1 (Unlimited) 2014 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-ave240c48s124l-datasheets-7169.pdf 9-DIP Module, 1/2 Brick 75V Remote On/Off, OCP, OTP, OVP, UVLO ITE (Commercial) 240W 1 12V 1.5kV 20A 94.6% 36V
EXB50-48D05-3V3J EXB50-48D05-3V3J Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module EXB50 (50W) Through Hole -40°C~100°C Tray 2.40Lx2.28W x 0.43 H 61.0mmx57.9mmx10.9mm 1 (Unlimited) 2005 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-exb5048d053v3j-datasheets-7187.pdf 9-DIP Module, 8 Leads 75V OTP, OVP, SCP, UVLO ITE (Commercial) 50W 2 5V 1.5kV 7.5A 7.5A 3.3V 89% 36V
LES20A24-1V8RANJ LES20A24-1V8RANJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module Typhoon (100W) Through Hole -40°C~85°C Tray 2.30Lx0.90W x 0.19 H 58.4mmx22.9mmx4.8mm 1 (Unlimited) HYBRID RoHS Compliant 2005 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-les20a243v3rej-datasheets-6953.pdf 8-DIP Module, 1/8 Brick 8 EAR99 1 36V Remote On/Off, OCP, OTP, OVP, SCP, UVLO ITE (Commercial) NO DUAL PIN/PEG Not Qualified R-XDMA-P8 1.8V 100W 1 1.8V 2.25kV 20A 24V YES 91% 18V
EXB30-48S3V3J EXB30-48S3V3J Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module EXB30 (30W) Through Hole -40°C~85°C Tray 2.00Lx1.90W x 0.43 H 50.8mmx48.3mmx10.9mm 1 (Unlimited) HYBRID 2005 /files/artesynembeddedpower-exb3048s05-datasheets-9196.pdf 9-DIP Module, 8 Leads 60.96mm 8 EAR99 unknown 1 75V Remote On/Off, OCP, OTP, SCP, UVLO ITE (Commercial) NO DUAL PIN/PEG R-XDMA-P8 3.3V 30W 1 3.3V 1.5kV 8A 48V YES 26.4W 90% 36V Enable, Active High
LES20A24-3V3RAJ LES20A24-3V3RAJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module Typhoon (100W) Through Hole Through Hole -40°C~85°C Tray 2.30Lx0.90W x 0.19 H 58.4mmx22.9mmx4.8mm 1 (Unlimited) HYBRID RoHS Compliant 2005 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-les20a243v3rej-datasheets-6953.pdf 8-DIP Module, 1/8 Brick 4.826mm 22.9mm 8 16 Weeks 8 EAR99 No 1 36V Remote On/Off, OCP, OTP, OVP, SCP, UVLO ITE (Commercial) 66W DUAL 8 20A 66W 3.3V 20A 100W 1 20A 2.25kV 18V YES Isolated 90% 18V Enable, Active Low
LQS100A48-1V2RANJ LQS100A48-1V2RANJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module LQS (200W) Through Hole -40°C~85°C Tray 2.30Lx1.45W x 0.33 H 58.4mmx36.8mmx8.4mm 1 (Unlimited) HYBRID 7.87mm 2010 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-lqs40a485v0aj-datasheets-7220.pdf 8-DIP Module, 1/4 Brick 58.4mm 36.8mm 8 EAR99 1 75V Remote On/Off, OTP, OVP, SCP, UVLO ITE (Commercial) NO DUAL PIN/PEG NOT SPECIFIED 8 NOT SPECIFIED Not Qualified R-XDMA-P8 1.2V 200W 1 1.2V 2.25kV 100A 48V YES 200W 86% 36V
LQS40A48-5V0AKJ LQS40A48-5V0AKJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module LQS (200W) Through Hole -40°C~85°C Tray 2.30Lx1.45W x 0.33 H 58.4mmx36.8mmx8.4mm 1 (Unlimited) HYBRID 7.87mm 2010 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-lqs40a485v0aj-datasheets-7220.pdf 8-DIP Module, 1/4 Brick 58.4mm 36.8mm 10 EAR99 1 75V Remote On/Off, OTP, OVP, SCP, UVLO ITE (Commercial) NO DUAL PIN/PEG 10 Not Qualified 5V 200W 1 5V 2.25kV 40A 48V YES 200W 92% 36V
LQS100A48-1V8RANJ LQS100A48-1V8RANJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module LQS (200W) Through Hole Through Hole -40°C~85°C Tray 2.30Lx1.45W x 0.33 H 58.4mmx36.8mmx8.4mm 1 (Unlimited) HYBRID RoHS Compliant 2010 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-lqs40a485v0aj-datasheets-7220.pdf 8-DIP Module, 1/4 Brick 58.4mm 8.382mm 36.8mm 8 37.000012g 10 EAR99 No 1 75V Remote On/Off, OTP, OVP, SCP, UVLO ITE (Commercial) 180W DUAL PIN/PEG 8 R-XDMA-P8 100A 180W 1.8V 100A 200W 1 100A 2.25kV 48V YES 200W 89.5% 36V
LQS100A48-1V8REKJ LQS100A48-1V8REKJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module LQS (200W) Through Hole -40°C~85°C Tray 2.30Lx1.45W x 0.41 H 58.4mmx36.8mmx10.4mm 1 (Unlimited) HYBRID 8.89mm 2010 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-lqs40a485v0aj-datasheets-7220.pdf 8-DIP Module, 1/4 Brick 58.4mm 36.8mm 8 EAR99 1 75V Remote On/Off, OTP, OVP, SCP, UVLO ITE (Commercial) NO DUAL PIN/PEG 8 Not Qualified R-XDMA-P8 1.8V 200W 1 1.8V 2.25kV 100A 48V YES 200W 89.5% 36V
LQS40A48-5V0EKJ LQS40A48-5V0EKJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module LQS (200W) Through Hole -40°C~85°C Tray 2.30Lx1.45W x 0.41 H 58.4mmx36.8mmx10.4mm 1 (Unlimited) HYBRID 8.89mm 2010 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-lqs40a485v0aj-datasheets-7220.pdf 8-DIP Module, 1/4 Brick 58.4mm 36.8mm 10 EAR99 1 75V Remote On/Off, OTP, OVP, SCP, UVLO ITE (Commercial) NO DUAL PIN/PEG 10 Not Qualified 5V 200W 1 5V 2.25kV 40A 48V YES 200W 92% 36V
LQS50A48-3V3AJ LQS50A48-3V3AJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module LQS (200W) Through Hole Through Hole -40°C~85°C Tray 2.30Lx1.45W x 0.33 H 58.4mmx36.8mmx8.4mm 1 (Unlimited) HYBRID RoHS Compliant 2010 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-lqs40a485v0aj-datasheets-7220.pdf 8-DIP Module, 1/4 Brick 8.382mm 8 37.000012g 8 EAR99 No 1 75V Remote On/Off, OTP, OVP, SCP, UVLO ITE (Commercial) 165W DUAL PIN/PEG 8 50A 165W 3.3V 50A 200W 1 50A 2.25kV 48V YES 200W 91% 36V
LQS50A48-2V5EJ LQS50A48-2V5EJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module LQS (200W) Through Hole Through Hole -40°C~85°C Tray 2.30Lx1.45W x 0.41 H 58.4mmx36.8mmx10.4mm 1 (Unlimited) HYBRID RoHS Compliant 2010 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-lqs40a485v0aj-datasheets-7220.pdf 8-DIP Module, 1/4 Brick 10.414mm 8 16 Weeks 8 EAR99 unknown 1 75V Remote On/Off, OTP, OVP, SCP, UVLO ITE (Commercial) 125W DUAL PIN/PEG NOT SPECIFIED 8 NOT SPECIFIED Not Qualified 50A 125W 2.5V 50A 200W 1 50A 2.25kV 48V YES 200W 90% 36V
LQS50A48-1V8RENJ LQS50A48-1V8RENJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module LQS (200W) Through Hole -40°C~85°C Tray 2.30Lx1.45W x 0.41 H 58.4mmx36.8mmx10.4mm 1 (Unlimited) HYBRID 8.89mm 2010 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-lqs40a485v0aj-datasheets-7220.pdf 8-DIP Module, 1/4 Brick 58.4mm 36.8mm 8 EAR99 1 75V Remote On/Off, OTP, OVP, SCP, UVLO ITE (Commercial) NO DUAL PIN/PEG NOT SPECIFIED 8 NOT SPECIFIED Not Qualified R-XDMA-P8 1.8V 200W 1 1.8V 2.25kV 50A 48V YES 200W 90.4% 36V
LQS80A48-1V5RAJ LQS80A48-1V5RAJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module LQS (200W) Through Hole Through Hole -40°C~85°C Tray 2.30Lx1.45W x 0.33 H 58.4mmx36.8mmx8.4mm 1 (Unlimited) HYBRID RoHS Compliant 2010 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-lqs40a485v0aj-datasheets-7220.pdf 8-DIP Module, 1/4 Brick 58.4mm 8.382mm 36.8mm 8 37.000012g 10 EAR99 No 1 75V Remote On/Off, OTP, OVP, SCP, UVLO ITE (Commercial) 120W DUAL PIN/PEG 8 R-XDMA-P8 80A 120W 1.5V 80A 200W 1 80A 2.25kV 48V YES 200W 88.8% 36V
LQS80A48-2V5ANJ LQS80A48-2V5ANJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module LQS (200W) Through Hole -40°C~85°C Tray 2.30Lx1.45W x 0.33 H 58.4mmx36.8mmx8.4mm 1 (Unlimited) HYBRID 7.87mm 2010 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-lqs40a485v0aj-datasheets-7220.pdf 8-DIP Module, 1/4 Brick 58.4mm 36.8mm 8 EAR99 1 75V Remote On/Off, OTP, OVP, SCP, UVLO ITE (Commercial) NO DUAL PIN/PEG 8 Not Qualified R-XDMA-P8 2.5V 200W 1 2.5V 2.25kV 80A 48V YES 200W 91% 36V
PTH03060YAZT PTH03060YAZT Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Non-Isolated PoL Module PTHxx060Y (18W) Surface Mount -40°C~85°C Tape & Reel (TR) 1.00Lx0.62W x 0.35 H 25.3mmx15.8mmx9.0mm 1 (Unlimited) HYBRID 2009 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-pth05060yad-datasheets-3766.pdf 10-SMD Module, 7 Leads 10 EAR99 1 3.65V Remote On/Off, OCP, UVLO ITE (Commercial) NO DUAL UNSPECIFIED Not Qualified 18W 1 0.55V~1.8V 10A 3.3V NO 86% 2.95V
PTH12050YAZ PTH12050YAZ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Non-Isolated PoL Module PTHxx050Y (10.8W) Surface Mount Surface Mount -40°C~85°C Tray 0.87Lx0.50W x 0.34 H 22.1mmx12.7mmx8.5mm 1 (Unlimited) HYBRID RoHS Compliant 2009 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-pth05050yad-datasheets-3787.pdf 6-SMD Module 8.636mm 12.57mm 6 6 EAR99 No 1 13.2V Remote On/Off, OCP, UVLO ITE (Commercial) 11W DUAL UNSPECIFIED 6A 10.8W 1.8V 6A 1 0.55V~1.8V 6A 12V NO Non-Isolated 85% 10.8V
SIL15C-05SADJ-VJ SIL15C-05SADJ-VJ Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Non-Isolated PoL Module SIL15C (75W) Through Hole Through Hole 0°C~80°C Tray 1.20Lx0.40W x 1.10 H 30.5mmx10.2mmx27.9mm 1 (Unlimited) 80°C 0°C RoHS Compliant 2005 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-sil15c12sadjvj-datasheets-9696.pdf 11-SIP Module 30.48mm 27.94mm 10.16mm 11 No 5.5V 5.5V Remote On/Off, OCP, SCP ITE (Commercial) 50W 15A 4.5V 50W 3.3V 15A 2.25kV 50W 1 0.9V~3.3V 15A 15A 89% 4.5V
PTV12010WAH PTV12010WAH Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Non-Isolated PoL Module PTV12010 (44W) Through Hole Through Hole -40°C~85°C Tray 0.90Lx0.33W x 0.40 H 22.9mmx8.4mmx10.2mm 1 (Unlimited) HYBRID RoHS Compliant 2005 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-ptv12010wad-datasheets-5500.pdf 8-SIP Module 10.16mm 8.38mm 8 8 EAR99 No 1 13.2V Remote On/Off, OCP, UVLO ITE (Commercial) 44W SINGLE PIN/PEG 8A 44W 5.5V 8A 1 1.2V~5.5V 8A 12V YES Non-Isolated 92% 10.8V
AEO25K48N-6L AEO25K48N-6L Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module AEO (66W) Through Hole Through Hole -40°C~100°C Bulk 2.30Lx0.90W x 0.32 H 58.4mmx22.9mmx8.1mm 1 (Unlimited) HYBRID RoHS Compliant 2008 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-aeo10b48nl-datasheets-1411.pdf 8-DIP Module, 1/8 Brick 8.128mm 8 8 yes EAR99 No 1 30W 75V Remote On/Off, OCP, OTP, OVP, UVLO ITE (Commercial) 30W UNSPECIFIED PIN/PEG 8 25A 30W 1.2V 25A 120W 1 25A 1.5kV 48V YES 66W 85.5% 36V
AEO40Y48-L AEO40Y48-L Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module AEO (100W) Through Hole Through Hole -40°C~100°C Bulk 2.30Lx0.90W x 0.32 H 58.4mmx22.9mmx8.1mm 1 (Unlimited) HYBRID RoHS Compliant 2008 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-aeo10b48nl-datasheets-1411.pdf 8-DIP Module, 1/8 Brick 8.128mm 8 8 yes EAR99 No 1 75V Remote On/Off, OCP, OTP, OVP, UVLO ITE (Commercial) 72W DUAL PIN/PEG 8 40A 72W 1.8V 40A 120W 1 40A 1.5kV 48V YES 88% 36V
AEO10B48-6L AEO10B48-6L Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module AEO (100W) Through Hole -40°C~100°C Bulk 2.30Lx0.90W x 0.32 H 58.4mmx22.9mmx8.1mm 1 (Unlimited) HYBRID RoHS Compliant 2008 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-aeo10b48nl-datasheets-1411.pdf 8-DIP Module, 1/8 Brick 8 1 75V Remote On/Off, OCP, OTP, OVP, UVLO ITE (Commercial) NO DUAL PIN/PEG NOT SPECIFIED 8 NOT SPECIFIED Not Qualified R-XDMA-P8 12V 120W 1 12V 1.5kV 10A 48V YES 93% 36V
AGQ100-48S1V8B-4 AGQ100-48S1V8B-4 Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module AGQ100 (100W) Through Hole -40°C~85°C Tray 2.28Lx1.45W x 0.50 H 57.9mmx36.8mmx12.7mm 1 (Unlimited) RoHS Compliant 2011 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-agq10048s1v8p4-datasheets-8890.pdf 8-DIP Module, 1/4 Brick 75V Remote On/Off, OCP, OTP, OVP, UVLO ITE (Commercial) NOT SPECIFIED NOT SPECIFIED 100W 1 1.8V 2kV 25A 89% 36V Enable, Active Low
AGQ100-48S1V2PB-4 AGQ100-48S1V2PB-4 Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module AGQ100 (100W) Through Hole -40°C~85°C Tray 2.28Lx1.45W x 0.50 H 57.9mmx36.8mmx12.7mm 1 (Unlimited) RoHS Compliant 2011 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-agq10048s1v8p4-datasheets-8890.pdf 8-DIP Module, 1/4 Brick 75V Remote On/Off, OCP, OTP, OVP, UVLO ITE (Commercial) NOT SPECIFIED NOT SPECIFIED 100W 1 1.2V 2kV 30A 87% 36V Enable, Active High
AEQ20B48N-6L AEQ20B48N-6L Artesyn Embedded Power
RFQ

Min: 1

Mult: 1

download Isolated Module AEQ20 (240W) Through Hole -40°C~85°C Bulk 2.30Lx1.45W x 0.43 H 58.4mmx36.8mmx10.8mm 1 (Unlimited) HYBRID 2008 https://pdf.utmel.com/r/datasheets/artesynembeddedpower-aeq20b48nl-datasheets-8723.pdf 8-DIP Module, 1/4 Brick 8 EAR99 1 75V Remote On/Off, OCP, OTP, OVP, UVLO ITE (Commercial) NO DUAL PIN/PEG 8 Not Qualified R-XDMA-P8 12V 240W 1 12V 2.25kV 20A 48V YES 240W 93% 36V

In Stock

Please send RFQ , we will respond immediately.