EL1012(TA)-VG Equivalent & Substitute Parts Reference

Part Overview

The EL1012(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 designed for DC input applications requiring galvanic isolation. The part is currently in active production status with 23,761 units in stock.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across isolation voltage, output type, channel configuration, package format, and operating temperature range. Alternative models may be required due to supply constraints, lead time considerations, or specific current transfer ratio requirements for application-specific designs.

Key Parameters

Parameter	Value	Unit
Isolation Voltage	5000	Vrms
Number of Channels	1	—
Output Type	Transistor	—
Input Type	DC	—
Maximum Output Voltage	80	V
Maximum Output Current	50	mA
Package Type	4-SMD, Gull Wing	—
Operating Temperature Range	-55 to 110	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the EL1012(TA)-VG are qualified based on the following mandatory electrical and mechanical parameters:

Primary Compatibility Criteria:

Isolation voltage: 5000Vrms (exact match required)
Number of channels: 1 (single channel only)
Output type: Transistor (no alternative output types)
Input type: DC (no alternative input types)
Package format: 4-SOP surface mount (4-SMD, Gull Wing configuration)
Mounting type: Surface Mount

Secondary Compatibility Parameters:

Maximum output voltage: 70V or 80V (both acceptable for 80V-rated applications)
Maximum output current: 50mA (exact match required)
Vce saturation: 300mV or 400mV (both acceptable)
Current transfer ratio: Variable across substitute models; selection depends on application requirements
Operating temperature range: -55°C to 100°C or -55°C to 110°C (both acceptable for standard industrial applications)

All substitute parts listed maintain ROHS3 compliance and MSL Level 1 rating. Substitutes are drawn exclusively from Vishay Semiconductor Opto Division TCLT and VOL617 series families, which share identical mechanical interfaces and isolation specifications with the EL1012(TA)-VG.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage (Vrms)	CTR Min @ Test Current (%)	CTR Max @ Test Current (%)	Max Output Voltage (V)	Max Output Current (mA)	Vce Sat Max (mV)	Operating Temp (°C)	Packaging
EL1012(TA)-VG	Everlight Electronics	5000	63 @ 10mA	125 @ 10mA	80	50	300	-55 to 110	Tape & Reel
TCLT1000	Vishay Opto	5000	50 @ 5mA	600 @ 5mA	70	50	300	-55 to 100	Tape & Reel
TCLT1002	Vishay Opto	5000	63 @ 10mA	125 @ 10mA	70	50	300	-55 to 100	Cut Tape & Digi-Reel
TCLT1003	Vishay Opto	5000	100 @ 10mA	200 @ 10mA	70	50	300	-55 to 100	Cut Tape & Digi-Reel
TCLT1005	Vishay Opto	5000	50 @ 5mA	150 @ 5mA	70	50	300	-55 to 100	Tape & Reel
TCLT1006	Vishay Opto	5000	100 @ 5mA	300 @ 5mA	70	50	300	-55 to 100	Tape & Reel
TCLT1007	Vishay Opto	5000	80 @ 5mA	160 @ 5mA	70	50	300	-55 to 100	Tape & Reel
TCLT1008	Vishay Opto	5000	130 @ 5mA	260 @ 5mA	70	50	300	-55 to 100	Tape & Reel
TCLT1009	Vishay Opto	5000	200 @ 5mA	400 @ 5mA	70	50	300	-55 to 100	Cut Tape & Digi-Reel
VOL617A-1T	Vishay Opto	5000	40 @ 5mA	80 @ 5mA	80	50	400	-55 to 110	Tape & Reel
VOL617A-1X001T	Vishay Opto	5000	40 @ 5mA	80 @ 5mA	80	50	400	-55 to 110	Tape & Reel

Engineering Selection Recommendations

Direct Electrical Equivalents (Matched CTR Range):

TCLT1002 provides the closest electrical match to EL1012(TA)-VG with identical current transfer ratio specifications (63% minimum, 125% maximum at 10mA). This part is suitable for direct substitution in applications where the 70V maximum output voltage is acceptable. TCLT1002 is available in higher inventory (143,200 units) and maintains ROHS3 compliance with REACH Unaffected status.

Extended Temperature Range Compatibility:

VOL617A-1T and VOL617A-1X001T maintain the full -55°C to 110°C operating temperature range of the EL1012(TA)-VG and support 80V maximum output voltage. These parts are suitable for applications requiring extended high-temperature operation. Current transfer ratio ranges (40% to 80% at 5mA) differ from the main part and must be evaluated against circuit requirements.

High Current Transfer Ratio Alternatives:

TCLT1008 (130% to 260% CTR at 5mA) and TCLT1009 (200% to 400% CTR at 5mA) are suitable for applications requiring higher gain characteristics. These parts operate within the -55°C to 100°C range and maintain 70V output voltage specification.

Low Current Transfer Ratio Alternatives:

TCLT1000 (50% to 600% CTR at 5mA) and TCLT1005 (50% to 150% CTR at 5mA) provide lower minimum gain specifications and are suitable for applications with relaxed current transfer ratio requirements.

All substitute parts maintain single-channel configuration, 5000Vrms isolation, 50mA output current, and 4-SOP surface mount package compatibility. Selection must be based on specific current transfer ratio requirements, maximum output voltage tolerance, and operating temperature constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can TCLT1002 replace EL1012(TA)-VG in all applications?

A: TCLT1002 is electrically equivalent with matching current transfer ratio specifications (63% to 125% at 10mA) and identical isolation voltage, output current, and package format. The maximum output voltage is 70V compared to 80V on the EL1012(TA)-VG. Substitution is valid for applications where 70V output voltage is sufficient. Operating temperature range is -55°C to 100°C versus -55°C to 110°C on the main part.

Q: What is the difference between TCLT1008 and EL1012(TA)-VG?

A: TCLT1008 has a higher current transfer ratio range (130% to 260% at 5mA) compared to EL1012(TA)-VG (63% to 125% at 10mA). Both maintain 5000Vrms isolation, 50mA output current, and 4-SOP package format. TCLT1008 operates to 100°C maximum versus 110°C for the main part. TCLT1008 is suitable for applications requiring higher gain but must be evaluated for circuit compatibility.

Q: Are VOL617A-1T and VOL617A-1X001T interchangeable?

A: VOL617A-1T and VOL617A-1X001T have identical electrical specifications and both support the full -55°C to 110°C operating temperature range with 80V maximum output voltage. Both are packaged in Tape & Reel format. These parts are functionally interchangeable for applications requiring extended temperature operation.

Q: What packaging options are available for substitutes?

A: Substitute parts are available in Tape & Reel (TR) and Cut Tape & Digi-Reel packaging formats. TCLT1002, TCLT1003, and TCLT1009 are supplied in Cut Tape & Digi-Reel format. All other substitutes use Tape & Reel packaging. Package selection depends on manufacturing process requirements and component handling systems.

Q: How do current transfer ratio specifications affect substitution?

A: Current transfer ratio (CTR) determines the optical coupling efficiency between input LED and output transistor. The EL1012(TA)-VG specifies 63% to 125% CTR at 10mA input current. Substitute parts with different CTR ranges (such as TCLT1000 at 50% to 600% or TCLT1008 at 130% to 260%) require circuit re-evaluation to ensure proper signal transfer and switching characteristics. CTR is tested at different input currents (5mA or 10mA) across different part families.

Q: Is the EL1012(TA)-VG compatible with 70V output voltage applications?

A: The EL1012(TA)-VG is rated for 80V maximum output voltage. It is suitable for 70V applications. However, most Vishay TCLT substitutes are rated for 70V maximum output voltage. For applications requiring 80V operation, VOL617A-1T or VOL617A-1X001T are recommended as they maintain the 80V specification.

Q: What is the significance of Vce saturation differences?

A: Vce saturation (collector-emitter saturation voltage) affects output voltage swing and power dissipation. EL1012(TA)-VG specifies 300mV maximum Vce saturation. Most TCLT substitutes also specify 300mV. VOL617A series parts specify 400mV maximum Vce saturation, resulting in slightly higher saturation voltage and increased power dissipation in switching applications.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts maintain ROHS3 compliance. Moisture Sensitivity Level is MSL 1 (Unlimited) across all parts, indicating no moisture sensitivity restrictions during storage or handling.

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