Vishay Semiconductor Opto Division(8828)

Compare Image Name Manufacturer Pricing(USD) Quantity Weight(Kg) Size(LxWxH) Part Status Mount Mounting Type Operating Temperature Packaging Moisture Sensitivity Level (MSL) Max Operating Temperature Min Operating Temperature Input Type RoHS Status Published Datasheet Voltage - Rated DC Package / Case Input Current Height Width Lead Free Factory Lead Time Approval Agency REACH SVHC Number of Pins Lead Pitch Pbfree Code ECCN Code Additional Feature Contact Plating Radiation Hardening Reach Compliance Code Number of Functions JESD-609 Code Terminal Finish Voltage Max Power Dissipation Base Part Number Number of Channels Power Dissipation Number of Elements Subcategory Ambient Temperature Range High Supplier Device Package Data Rate Max Output Voltage Output Voltage Forward Current Forward Voltage Output Type Max Input Current Optoelectronic Device Type Forward Current-Max Rise Time Fall Time (Typ) Configuration Row Spacing Voltage - Isolation Power Dissipation-Max Reverse Breakdown Voltage Reverse Voltage Collector Emitter Breakdown Voltage Collector Emitter Saturation Voltage Collector Emitter Voltage (VCEO) Max Collector Current Voltage - Forward (Vf) (Typ) Rise / Fall Time (Typ) Current - DC Forward (If) (Max) Reverse Voltage (DC) Output Current per Channel Current Transfer Ratio Current - Output / Channel Voltage - Output (Max) Dark Current-Max Current Transfer Ratio (Min) Current Transfer Ratio (Max) Turn On / Turn Off Time (Typ) Vce Saturation (Max)
VOS617A-3T VOS617A-3T Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~110°C Tape & Reel (TR) 1 (Unlimited) DC ROHS3 Compliant 1995 /files/vishaysemiconductoroptodivision-vos617a4x001t-datasheets-7325.pdf 4-SOP (0.173, 4.40mm) 6 Weeks 4 yes EAR99 UL RECOGNIZED No 70mW 1 170mW 1 50mA Transistor 50mA 3μs 3 μs SINGLE 3750Vrms 6V 400mV 80V 50mA 1.18V 3μs 3μs 6V 80V 100% @ 5mA 200% @ 5mA 6μs, 4μs
SFH6206-3T SFH6206-3T Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download PCB, Surface Mount Surface Mount -55°C~100°C Tape & Reel (TR) 1 (Unlimited) AC, DC ROHS3 Compliant /files/vishaysemiconductoroptodivision-sfh620a3x001-datasheets-4684.pdf 4-SMD, Gull Wing 60mA Lead Free 15 Weeks 4 EAR99 UL APPROVED Tin No e3 5V 150mW 1 250mW 1 70V 70V 60mA Transistor 60mA 2s 2 s SINGLE 5300Vrms 6V 400mV 70V 100mA 1.25V 2μs 2μs 50mA 100% @ 10mA 320% @ 10mA 3μs, 2.3μs
SFH615A-3 SFH615A-3 Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download PCB, Through Hole Through Hole -55°C~100°C Tube 1 (Unlimited) 100°C -55°C DC ROHS3 Compliant 2005 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-sfh615a2x006-datasheets-4603.pdf 1.25V 4-DIP (0.300, 7.62mm) 60mA Lead Free 11 Weeks UL No SVHC 4 Tin No 150mW 1 150mW 1 4-DIP 70V 70V 60mA 1.65V Transistor 60mA 3s 14 s 5300Vrms 6V 70V 400mV 70V 100mA 1.35V 2μs 2μs 60mA 6V 50mA 50mA 70V 100% @ 10mA 200% @ 10mA 3μs, 2.3μs 400mV
CNY65AGRST CNY65AGRST Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download PCB, Surface Mount Surface Mount -55°C~85°C Digi-Reel® 4 (72 Hours) DC ROHS3 Compliant 2012 /files/vishaysemiconductoroptodivision-cny64agrst-datasheets-6321.pdf 4-SMD, Gull Wing 50mA Lead Free 10 Weeks Unknown 4 EAR99 UL APPROVED, VDE APPROVED No 250mW 1 250mW 1 32V 32V 75mA Transistor 75mA 2.4μs 2.7 μs SINGLE 13900VDC 5V 300mV 32V 50mA 1.32V 2.4μs 2.7μs 5V 50mA 200nA 100% @ 5mA 300% @ 5mA 5μs, 3μs
VO615A-9X006 VO615A-9X006 Vishay Semiconductor Opto Division $0.36
RFQ

Min: 1

Mult: 1

download Through Hole Through Hole -55°C~110°C Tube 1 (Unlimited) DC ROHS3 Compliant 1995 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-vo615a4x018t-datasheets-4982.pdf 4-DIP (0.400, 10.16mm) 14 Weeks 4 EAR99 UL RECOGNIZED No 70mW 1 70mW 1 70V 70V 60mA Transistor 60mA SINGLE 5000Vrms 6V 300mV 70V 50mA 1.43V 3μs 4.7μs 50mA 200% @ 5mA 400% @ 5mA 6μs, 5μs
SFH6286-2X001T SFH6286-2X001T Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Surface Mount, Through Hole Surface Mount -55°C~100°C Tape & Reel (TR) 1 (Unlimited) 100°C -55°C AC, DC ROHS3 Compliant 1995 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-sfh62862-datasheets-4710.pdf 4-SMD, Gull Wing 6 Weeks 4 No 150mW 1 150mW 1 4-SMD 55V 50mA 1.1V Transistor 50mA 3.5μs 5 μs 5300Vrms 400mV 55V 100mA 1.1V 3.5μs 5μs 50mA 50mA 50mA 55V 63% @ 1mA 200% @ 1mA 6μs, 5.5μs 400mV
SFH6315T SFH6315T Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~100°C Tape & Reel (TR) 1 (Unlimited) DC ROHS3 Compliant 2015 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-sfh6316t-datasheets-9670.pdf 8-SOIC (0.154, 3.90mm Width) 16mA Lead Free 6 Weeks 8 TTL COMPATIBLE, UL APPROVED, VDE APPROVED No 100mW 1 100mW 1 1 Mbps 25V 25V 25mA Transistor with Base 25mA LOGIC IC OUTPUT OPTOCOUPLER SINGLE 4000Vrms 3V 8mA 1.6V 8mA 7% @ 16mA 50% @ 16mA 500ns, 500ns
CNY65ABST CNY65ABST Vishay Semiconductor Opto Division $2.58
RFQ

Min: 1

Mult: 1

download PCB, Surface Mount Surface Mount -55°C~85°C Tape & Reel (TR) 4 (72 Hours) DC ROHS3 Compliant 2011 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-cny64agrst-datasheets-6321.pdf 4-SMD, Gull Wing 50mA Lead Free 8 Weeks Unknown 4 EAR99 UL APPROVED, VDE APPROVED No 250mW 1 250mW 1 32V 32V 75mA Transistor 75mA 2.4μs 2.7 μs SINGLE 13900VDC 5V 300mV 32V 50mA 1.32V 2.4μs 2.7μs 5V 50mA 200nA 80% @ 5mA 240% @ 5mA 5μs, 3μs
VOS617A-4T VOS617A-4T Vishay Semiconductor Opto Division $0.62
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~110°C Tape & Reel (TR) 1 (Unlimited) DC ROHS3 Compliant 1995 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-vos617a4x001t-datasheets-7325.pdf 4-SOIC (0.173, 4.40mm Width) 50mA 11 Weeks 4 yes EAR99 UL RECOGNIZED No 170mW 1 170mW 1 80V 80V 50mA Transistor 50mA SINGLE 3750Vrms 6V 400mV 80V 50mA 1.18V 3μs 3μs 50mA 160% @ 5mA 320% @ 5mA 6μs, 4μs
VOS615A-3X001T VOS615A-3X001T Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~110°C Cut Tape (CT) 1 (Unlimited) 110°C -55°C DC ROHS3 Compliant 1995 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-vos615a3t-datasheets-7071.pdf 4-SOIC (0.173, 4.40mm Width) 50mA 11 Weeks Unknown 4 170mW 1 170mW 1 4-SSOP 80V 50mA 1.5V Transistor 3750Vrms 6V 400mV 80V 50mA 1.2V 3μs 4μs 50mA 50mA 80V 100% @ 10mA 200% @ 10mA 5μs, 5μs 400mV
TCMT1103 TCMT1103 Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download PCB, Surface Mount Surface Mount -40°C~100°C Tape & Reel (TR) 1 (Unlimited) DC ROHS3 Compliant https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-tcmt1101-datasheets-4904.pdf 70V 4-SOIC (0.173, 4.40mm Width) 50mA 7mm Lead Free 6 Weeks Unknown 4 1.27mm EAR99 Tin No 250mW 1 250mW 1 70V 70V 60mA Transistor 60mA 3s 4.7 s 7 mm 3750Vrms 6V 70V 300mV 70V 50mA 1.35V 5.5μs 7μs 50mA 100% @ 10mA 200% @ 10mA 9.5μs, 8.5μs 300mV
ILD217T ILD217T Vishay Semiconductor Opto Division $4.51
RFQ

Min: 1

Mult: 1

download PCB, Surface Mount Surface Mount -55°C~100°C Tape & Reel (TR) 1 (Unlimited) 100°C -55°C DC ROHS3 Compliant 2004 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-ild217t-datasheets-6887.pdf 1.2V 8-SOIC (0.154, 3.90mm Width) 10mA 3.5mm Lead Free 6 Weeks UL Unknown 8 Tin No 300mW 2 300mW 2 100°C 8-SOIC 70V 70V 30mA 1.2V Transistor 30mA 4000Vrms 6V 6V 70V 400mV 70V 1.2V 3μs 4.7μs 30mA 6V 120 % 70V 100% @ 1mA 6μs, 5μs 400mV
IL300-E-X009T IL300-E-X009T Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~100°C Tape & Reel (TR) 1 (Unlimited) DC ROHS3 Compliant 1995 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-il300defgx016-datasheets-4936.pdf 8-SMD, Gull Wing 32 Weeks unknown e3 Matte Tin (Sn) 1 1 Optocoupler - Transistor Outputs 500mV Photovoltaic, Linearized OPTOELECTRONIC DEVICE 0.06A 5300Vrms 0.05W 1.25V 1μs 1μs 60mA 70μA Typ
IL300-F-X017T IL300-F-X017T Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~100°C Tape & Reel (TR) 1 (Unlimited) DC ROHS3 Compliant 1995 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-il300defgx016-datasheets-4936.pdf 8-SMD, Gull Wing Lead Free 37 Weeks 8 yes No 1 e3 Matte Tin (Sn) 210mW 1 210mW 1 Optocoupler - Transistor Outputs 500mV 60mA Photovoltaic, Linearized 60mA OPTOELECTRONIC DEVICE 1.75μs 1.75 μs DUAL, SIMULTANEOUS OPERATION 5300Vrms 5V 1.25V 1μs 1μs 5V 1.1 % 70μA Typ
4N26-X009T 4N26-X009T Vishay Semiconductor Opto Division $0.73
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~100°C Tape & Reel (TR) 1 (Unlimited) 100°C -55°C DC ROHS3 Compliant 2014 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-4n25x009-datasheets-5561.pdf 6-SMD, Gull Wing Lead Free 11 Weeks 6 No 150mW 4N26 1 150mW 1 6-SMD 70V 60mA 1.36V Transistor with Base 60mA 5000Vrms 6V 500mV 70V 100mA 1.36V 2μs 2μs 60mA 50mA 50 % 50mA 70V 20% @ 10mA 500mV
ILD615-4 ILD615-4 Vishay Semiconductor Opto Division $1.59
RFQ

Min: 1

Mult: 1

download Through Hole Through Hole -55°C~100°C Tube 1 (Unlimited) 100°C -55°C DC ROHS3 Compliant 2014 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-ilq6151-datasheets-4795.pdf 1.15V 8-DIP (0.300, 7.62mm) 10mA 6 Weeks Unknown 8 No 400mW 2 500mW 2 8-DIP 70V 70V 60mA 1.3V Transistor 60mA 5300Vrms 6V 70V 50mA 1.15V 2μs 2μs 60mA 50mA 50mA 70V 160% @ 10mA 320% @ 10mA 3μs, 2.3μs
CNY17F-1X006 CNY17F-1X006 Vishay Semiconductor Opto Division $0.61
RFQ

Min: 1

Mult: 1

download Through Hole Through Hole -55°C~110°C Tube 1 (Unlimited) DC ROHS3 Compliant 1995 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-cny17f3x001-datasheets-4554.pdf 6-DIP (0.300, 7.62mm) 11 Weeks 6 yes EAR99 UL RECOGNIZED No e3 Matte Tin (Sn) 150mW 1 150mW 1 70V 60mA Transistor 60mA SINGLE 5000Vrms 6V 400mV 70V 100mA 1.39V 2μs 2μs 50mA 50nA 40% @ 10mA 80% @ 10mA 3μs, 2.3μs
SFH6106-2 SFH6106-2 Vishay Semiconductor Opto Division $0.72
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~100°C Tube 1 (Unlimited) 100°C -55°C DC ROHS3 Compliant 2014 /files/vishaysemiconductoroptodivision-sfh61064-datasheets-4576.pdf 1.25V 4-SMD, Gull Wing 60mA 6 Weeks No SVHC 4 No 150mW 1 150mW 1 4-SMD 70V 70V 60mA 1.65V Transistor 60mA 5300Vrms 6V 400mV 70V 100mA 1.25V 2μs 2μs 60mA 6V 50mA 50mA 70V 63% @ 10mA 125% @ 10mA 3μs, 2.3μs 400mV
4N25-X009T 4N25-X009T Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~100°C Tape & Reel (TR) 1 (Unlimited) 100°C -55°C DC ROHS3 Compliant 2015 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-4n25x009-datasheets-5561.pdf 6-SMD, Gull Wing Lead Free 11 Weeks 6 Tin No 150mW 4N25 1 150mW 1 6-SMD 70V 60mA 1.36V Transistor with Base 60mA 5000Vrms 6V 500mV 70V 100mA 1.36V 2μs 2μs 60mA 50mA 50 % 50mA 70V 20% @ 10mA 500mV
SFH690CT SFH690CT Vishay Semiconductor Opto Division $0.62
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~100°C Tape & Reel (TR) 1 (Unlimited) 100°C -55°C DC ROHS3 Compliant 1995 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-sfh690at3-datasheets-8073.pdf 4-SMD, Gull Wing 6 Weeks 4 No 150mW 1 150mW 1 4-SOP (2.54mm) 70V 50mA 1.4V Transistor 50mA 3750Vrms 6V 300mV 70V 100mA 1.15V 3μs 4μs 50mA 50mA 50mA 70V 100% @ 5mA 200% @ 5mA 5μs, 3μs 300mV
VOS618AT VOS618AT Vishay Semiconductor Opto Division $0.72
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~110°C Tape & Reel (TR) 1 (Unlimited) DC ROHS3 Compliant 2013 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-vos618a3t-datasheets-8401.pdf 4-SOIC (0.173, 4.40mm Width) 50mA 11 Weeks Unknown 4 yes EAR99 UL RECOGNIZED 170mW 1 170mW 1 80V 80V 50mA Transistor SINGLE 3750Vrms 6V 400mV 80V 50mA 1.1V 5μs 7μs 50mA 50% @ 1mA 600% @ 1mA 5μs, 8μs
SFH6106-4X001T SFH6106-4X001T Vishay Semiconductor Opto Division $0.91
RFQ

Min: 1

Mult: 1

download Surface Mount, Through Hole Surface Mount -55°C~100°C Tape & Reel (TR) 1 (Unlimited) DC ROHS3 Compliant 1995 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-sfh61064-datasheets-4576.pdf 4-SMD, Gull Wing 6 Weeks 4 yes EAR99 UL APPROVED, VDE APPROVED No e3 Matte Tin (Sn) 150mW 1 150mW 1 70V 60mA Transistor 60mA 4μs 15 μs SINGLE 5300Vrms 6V 400mV 70V 100mA 1.25V 2μs 2μs 50mA 160% @ 10mA 320% @ 10mA 3μs, 2.3μs
H11B3 H11B3 Vishay Semiconductor Opto Division $14.40
RFQ

Min: 1

Mult: 1

download Through Hole -55°C~100°C Tube 1 (Unlimited) DC ROHS3 Compliant 2001 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-h11b2-datasheets-3709.pdf 1.1V 6-DIP (0.300, 7.62mm) 60mA 6 Weeks 6 1 6-DIP 30V Darlington with Base 5300Vrms 1.1V 60mA 100mA 25V 100% @ 1mA 5μs, 30μs 1V
IL2 IL2 Vishay Semiconductor Opto Division $5.68
RFQ

Min: 1

Mult: 1

download Through Hole Through Hole -40°C~100°C Tube 1 (Unlimited) 100°C -40°C DC ROHS3 Compliant https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-il2x009t-datasheets-6120.pdf 1.25V 6-DIP (0.300, 7.62mm) 60mA Unknown 6 No 250mW 1 250mW 1 6-DIP 70V 70V 60mA 1.65V Transistor with Base 60mA 5300Vrms 6V 250mV 70V 400mA 1.25V 2.6μs 2.2μs 60mA 50mA 50mA 70V 100% @ 10mA 500% @ 10mA 1.2μs, 2.3μs 250mV (Typ)
TCLT1010 TCLT1010 Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~110°C Tape & Reel (TR) 1 (Unlimited) 110°C -55°C DC ROHS3 Compliant 2016 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-tclt1013-datasheets-4990.pdf 4-SMD, Gull Wing 6 Weeks 4 No 250mW 1 250mW 1 4-LSOP (2.54mm) 70V 60mA 1.25V Transistor 60mA 5000Vrms 6V 300mV 70V 50mA 1.25V 3μs 4.7μs 60mA 50mA 50mA 70V 50% @ 5mA 600% @ 5mA 6μs, 5μs 300mV
TCLT1111 TCLT1111 Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~110°C Tape & Reel (TR) 1 (Unlimited) DC ROHS3 Compliant 2016 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-tclt1113-datasheets-8196.pdf 6-SOIC (0.295, 7.50mm Width), 5 Leads 6 Weeks yes EAR99 UL RECOGNIZED No e3 Matte Tin (Sn) 250mW 1 1 Optocoupler - Transistor Outputs 70V Transistor with Base 60mA TRANSISTOR OUTPUT OPTOCOUPLER 0.06A SINGLE 5000Vrms 300mV 300mV 50mA 1.25V 3μs 4.7μs 60mA 50mA 40% @ 10mA 80% @ 10mA 6μs, 5μs
SFH615A-2X001 SFH615A-2X001 Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Through Hole Through Hole -55°C~100°C Tube 1 (Unlimited) 100°C -55°C DC ROHS3 Compliant 1995 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-sfh615a2x006-datasheets-4603.pdf 4-DIP (0.400, 10.16mm) 11 Weeks 4 No 150mW 1 150mW 1 4-DIP 70V 60mA 1.35V Transistor 60mA 5300Vrms 6V 400mV 70V 100mA 1.35V 2μs 2μs 60mA 50mA 50mA 70V 63% @ 10mA 125% @ 10mA 3μs, 2.3μs 400mV
4N26-X017T 4N26-X017T Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~100°C Tape & Reel (TR) 1 (Unlimited) DC ROHS3 Compliant 2012 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-4n25x009-datasheets-5561.pdf 6-SMD, Gull Wing Lead Free 11 Weeks 6 EAR99 No 150mW 4N26 1 150mW 1 Optocoupler - Transistor Outputs 70V 60mA Transistor with Base 60mA 5000Vrms 6V 500mV 70V 100mA 1.36V 2μs 2μs 50mA 50 % 20% @ 10mA
CNY117F-3X001 CNY117F-3X001 Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Through Hole Through Hole -55°C~110°C Tube 1 (Unlimited) DC ROHS3 Compliant 2016 https://pdf.utmel.com/r/datasheets/vishaysemiconductoroptodivision-cny117f3x016-datasheets-4504.pdf 6-DIP (0.300, 7.62mm) 11 Weeks 6 No 150mW 1 150mW 70V 60mA Transistor 60mA 5000Vrms 6V 400mV 70V 100mA 1.39V 2μs 2μs 50mA 100% @ 10mA 200% @ 10mA 3μs, 2.3μs
SFH615AY-X018T SFH615AY-X018T Vishay Semiconductor Opto Division
RFQ

Min: 1

Mult: 1

download Surface Mount Surface Mount -55°C~100°C Tape & Reel (TR) 1 (Unlimited) DC ROHS3 Compliant 1995 /files/vishaysemiconductoroptodivision-sfh615agrx017-datasheets-5842.pdf 4-SMD, Gull Wing 6 Weeks 4 EAR99 No e3 Matte Tin (Sn) 150mW 1 150mW 1 70V 60mA Transistor 60mA 5300Vrms 6V 400mV 70V 100mA 1.25V 50mA 50% @ 5mA 150% @ 5mA 2μs, 25μs

In Stock

Please send RFQ , we will respond immediately.