EL1018(TA)-VG Equivalent & Substitute Parts

Part Overview

The EL1018(TA)-VG is a 5000Vrms optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This single-channel device operates in the 4-SOP (2.54mm) surface mount package and is classified as Active product status. The component provides galvanic isolation suitable for applications requiring high voltage isolation with DC input control and transistor output switching capability. Substitute parts are identified based on matching isolation voltage, package type, output configuration, and electrical performance parameters within acceptable operational ranges.

Key Parameters

Parameter	Value	Unit
Isolation Voltage	5000	Vrms
Number of Channels	1	—
Output Type	Transistor	—
Package Type	4-SOP (2.54mm), Gull Wing	—
Current Transfer Ratio (Min)	130%	@ 5mA
Current Transfer Ratio (Max)	260%	@ 5mA
Maximum Output Voltage	80	V
Output Current per Channel	50	mA
Operating Temperature Range	-55 to 110	°C
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the EL1018(TA)-VG are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Isolation voltage: 5000Vrms (mandatory)
Number of channels: 1 (mandatory)
Output type: Transistor (mandatory)
Package configuration: 4-SOP, Gull Wing surface mount (mandatory)
Input type: DC (mandatory)

Secondary Performance Parameters:

Current Transfer Ratio range at specified test current
Maximum output voltage capability
Output current rating (50mA per channel)
Vce saturation voltage
Turn-on/turn-off switching times
Rise/fall times
Operating temperature range

Substitutes are classified into two groups based on Current Transfer Ratio specifications at 5mA test current, which directly affects circuit performance and design margins. Parts with CTR specifications matching or exceeding the EL1018(TA)-VG range (130%-260% @ 5mA) provide direct functional replacement. Parts with different CTR specifications at different test currents (10mA) or alternative CTR ranges require circuit-level evaluation but maintain electrical isolation and switching functionality within the 4-SOP package footprint.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage (Vrms)	CTR Min @ Test Current	CTR Max @ Test Current	Max Output Voltage (V)	Output Current (mA)	Vce Sat (mV)	Temp Range (°C)	Package
EL1018(TA)-VG	Everlight Electronics	5000	130% @ 5mA	260% @ 5mA	80	50	300	-55 to 110	4-SOP (2.54mm)
TCLT1000	Vishay Semiconductor Opto	5000	50% @ 5mA	600% @ 5mA	70	50	300	-55 to 100	4-SOP
TCLT1002	Vishay Semiconductor Opto	5000	63% @ 10mA	125% @ 10mA	70	50	300	-55 to 100	4-SOP
TCLT1003	Vishay Semiconductor Opto	5000	100% @ 10mA	200% @ 10mA	70	50	300	-55 to 100	4-SOP
TCLT1005	Vishay Semiconductor Opto	5000	50% @ 5mA	150% @ 5mA	70	50	300	-55 to 100	4-SOP
TCLT1006	Vishay Semiconductor Opto	5000	100% @ 5mA	300% @ 5mA	70	50	300	-55 to 100	4-SOP
TCLT1007	Vishay Semiconductor Opto	5000	80% @ 5mA	160% @ 5mA	70	50	300	-55 to 100	4-SOP
TCLT1008	Vishay Semiconductor Opto	5000	130% @ 5mA	260% @ 5mA	70	50	300	-55 to 100	4-SOP
TCLT1009	Vishay Semiconductor Opto	5000	200% @ 5mA	400% @ 5mA	70	50	300	-55 to 100	4-SOP
VOL617A-1X001T	Vishay Semiconductor Opto	5000	40% @ 5mA	80% @ 5mA	80	50	400	-55 to 110	4-SOP
VOL617A-2X001T	Vishay Semiconductor Opto	5000	63% @ 5mA	125% @ 5mA	80	50	400	-55 to 110	4-SOP

Engineering Selection Recommendations

Direct Functional Equivalent:

TCLT1008 provides identical Current Transfer Ratio specifications (130%-260% @ 5mA) to the EL1018(TA)-VG. Both parts maintain 5000Vrms isolation, single-channel transistor output, 4-SOP package configuration, and 50mA output current capability. TCLT1008 is manufactured by Vishay Semiconductor Opto Division and carries Active product status with ROHS3 compliance and unlimited moisture sensitivity rating. The primary design difference is maximum output voltage (70V versus 80V) and operating temperature upper limit (100°C versus 110°C). Selection of TCLT1008 is appropriate for applications where the 70V output voltage ceiling and 100°C maximum temperature are within system requirements.

Extended Temperature Range Equivalent:

VOL617A-2X001T maintains the -55°C to 110°C operating temperature range matching the EL1018(TA)-VG and provides 80V maximum output voltage. Current Transfer Ratio specification is 63%-125% @ 5mA, which falls below the EL1018(TA)-VG range. VOL617A-2X001T is suitable for applications requiring extended high-temperature operation where the lower CTR specification does not compromise circuit performance margins.

Alternative CTR Specifications:

TCLT1006 provides 100%-300% @ 5mA CTR range, encompassing the EL1018(TA)-VG specification band. TCLT1009 offers 200%-400% @ 5mA, providing higher current transfer efficiency. Both maintain 5000Vrms isolation, single-channel configuration, and 4-SOP package. These alternatives are suitable where higher CTR performance improves circuit efficiency or reduces input current requirements.

All substitute parts listed carry Active product status, ROHS3 compliance, and unlimited moisture sensitivity rating (MSL 1), matching the regulatory and environmental classification of the EL1018(TA)-VG.

Frequently Asked Questions (FAQ)

Q: Can TCLT1008 replace EL1018(TA)-VG in all applications?

A: TCLT1008 provides identical Current Transfer Ratio specifications and maintains 5000Vrms isolation with single-channel transistor output in 4-SOP package. The primary differences are maximum output voltage (70V versus 80V) and operating temperature upper limit (100°C versus 110°C). Substitution is valid for applications where these specifications are within design margins.

Q: What is the significance of Current Transfer Ratio (CTR) in optoisolator selection?

A: Current Transfer Ratio defines the ratio of output collector current to input LED current. Higher CTR values reduce required input current for a given output current, improving circuit efficiency and reducing input drive requirements. The EL1018(TA)-VG specifies 130%-260% @ 5mA. Substitute parts with different CTR ranges require circuit-level evaluation to confirm adequate output current delivery at specified input drive levels.

Q: Why do some substitute parts specify CTR at 10mA instead of 5mA?

A: TCLT1002 and TCLT1003 specify Current Transfer Ratio at 10mA input current rather than 5mA. This represents a different test condition and does not directly compare to the EL1018(TA)-VG 5mA specification. Circuit designers must evaluate whether the 10mA test condition aligns with actual circuit operating points or if alternative parts with 5mA specifications are required.

Q: Are all substitute parts pin-compatible with EL1018(TA)-VG?

A: All listed substitute parts maintain 4-SOP package configuration with Gull Wing surface mount leads. Physical footprint and pin spacing are compatible. However, electrical performance differences (CTR, output voltage, saturation voltage) may require circuit design adjustments. Mechanical compatibility does not guarantee electrical interchangeability without circuit analysis.

Q: What is the difference between TCLT and VOL617 series optoisolators?

A: Both TCLT and VOL617 series provide 5000Vrms isolation in 4-SOP packages. TCLT series parts specify maximum output voltage of 70V, while VOL617A series specifies 80V. VOL617A series also specifies higher Vce saturation voltage (400mV versus 300mV). Selection depends on circuit output voltage requirements and saturation voltage tolerance.

Q: Can I use TCLT1009 where EL1018(TA)-VG is specified?

A: TCLT1009 provides 200%-400% @ 5mA Current Transfer Ratio, which exceeds the EL1018(TA)-VG specification band (130%-260%). Higher CTR improves circuit efficiency and reduces input current requirements. Substitution is valid where the higher CTR does not cause circuit instability or excessive output current. Circuit-level evaluation is required to confirm compatibility with input drive circuitry and output load characteristics.

Q: What compliance certifications apply to all substitute parts?

A: All listed substitute parts carry ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). These certifications match the EL1018(TA)-VG environmental and regulatory classification, ensuring compatibility with manufacturing processes and end-use environmental requirements.

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