EL1018-VG Equivalent & Substitute Parts

Part Overview

The EL1018-VG is an optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides 5000Vrms isolation with a single channel in a 4-SOP surface mount package. The device is classified as Active product status and is RoHS3 compliant with MSL Level 1 (Unlimited moisture sensitivity).

Substitute parts are identified based on matching core electrical and mechanical parameters: 5000Vrms isolation voltage, single channel configuration, transistor output type, 4-SOP package format, 50mA output current capability, and surface mount gull wing mounting. Alternatives are selected from manufacturers with equivalent product lines and active production status.

Key Parameters

Parameter	Value
Manufacturer Part Number	EL1018-VG
Manufacturer	Everlight Electronics Co Ltd
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Output Type	Transistor
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Package / Case	4-SMD, Gull Wing
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 110°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts are grouped based on strict parameter matching across the following criteria:

Core Matching Parameters:

Voltage - Isolation: 5000Vrms (mandatory)
Number of Channels: 1 (mandatory)
Output Type: Transistor (mandatory)
Package / Case: 4-SMD, Gull Wing (mandatory)
Current - Output / Channel: 50mA (mandatory)
Mounting Type: Surface Mount (mandatory)
Input Type: DC (mandatory)

Secondary Compatibility Parameters:

Vce Saturation (Max): 300mV (standard across all substitutes)
Current - DC Forward (If) (Max): 60mA (standard across all substitutes)
RoHS Status: ROHS3 Compliant (all substitutes)
Moisture Sensitivity Level (MSL): 1 (Unlimited) (all substitutes)
Product Status: Active (all substitutes)

Variable Parameters (Acceptable Variation):

Current Transfer Ratio (Min/Max): Varies by part grade
Turn On / Turn Off Time: Ranges from 4µs to 6µs
Rise / Fall Time: Ranges from 2µs to 4.7µs
Voltage - Output (Max): 70V to 80V
Voltage - Forward (Vf) (Typ): 1.16V to 1.45V
Operating Temperature (Max): 100°C to 110°C

All substitute parts maintain functional equivalence within the optoisolator 5KV transistor output category and are suitable for direct replacement in applications where the EL1018-VG is specified.

Parameter Comparison

Part Number	Manufacturer	Voltage - Isolation	Current Transfer Ratio (Min @ mA)	Current Transfer Ratio (Max @ mA)	Voltage - Output (Max)	Turn On / Turn Off Time (Typ)	Operating Temperature (Max)	Packaging	Inventory
EL1018-VG	Everlight Electronics Co Ltd	5000Vrms	130% @ 5mA	260% @ 5mA	80V	4µs, 3µs	110°C	4-SOP (2.54mm)	1007 Pcs
TCLT1000	Vishay Semiconductor Opto Division	5000Vrms	50% @ 5mA	600% @ 5mA	70V	6µs, 5µs	100°C	Tape & Reel (TR)	7868 Pcs
TCLT1002	Vishay Semiconductor Opto Division	5000Vrms	63% @ 10mA	125% @ 10mA	70V	6µs, 5µs	100°C	Cut Tape (CT) & Digi-Reel®	143200 Pcs
TCLT1003	Vishay Semiconductor Opto Division	5000Vrms	100% @ 10mA	200% @ 10mA	70V	6µs, 5µs	100°C	Cut Tape (CT) & Digi-Reel®	48579 Pcs
TCLT1005	Vishay Semiconductor Opto Division	5000Vrms	50% @ 5mA	150% @ 5mA	70V	6µs, 5µs	100°C	Tape & Reel (TR)	17339 Pcs
TCLT1006	Vishay Semiconductor Opto Division	5000Vrms	100% @ 5mA	300% @ 5mA	70V	6µs, 5µs	100°C	Tape & Reel (TR)	30944 Pcs
TCLT1007	Vishay Semiconductor Opto Division	5000Vrms	80% @ 5mA	160% @ 5mA	70V	6µs, 5µs	100°C	Tape & Reel (TR)	32880 Pcs
TCLT1008	Vishay Semiconductor Opto Division	5000Vrms	130% @ 5mA	260% @ 5mA	70V	6µs, 5µs	100°C	Tape & Reel (TR)	59200 Pcs
TCLT1009	Vishay Semiconductor Opto Division	5000Vrms	200% @ 5mA	400% @ 5mA	70V	6µs, 5µs	100°C	Cut Tape (CT) & Digi-Reel®	39037 Pcs
VOL617A-1X001T	Vishay Semiconductor Opto Division	5000Vrms	40% @ 5mA	80% @ 5mA	80V	6µs, 5.5µs	110°C	Tape & Reel (TR)	2200 Pcs
VOL617A-2X001T	Vishay Semiconductor Opto Division	5000Vrms	63% @ 5mA	125% @ 5mA	80V	6µs, 5.5µs	110°C	Tape & Reel (TR)	28647 Pcs

Engineering Selection Recommendations

Primary Substitute - TCLT1008: TCLT1008 is the closest functional equivalent to EL1018-VG. Both parts share identical Current Transfer Ratio specifications (130% minimum and 260% maximum at 5mA input current). TCLT1008 is manufactured by Vishay Semiconductor Opto Division, an active producer with ROHS3 compliance and MSL Level 1 rating. The part is available in high inventory (59200 Pcs). The primary difference is maximum output voltage (70V versus 80V on EL1018-VG) and operating temperature maximum (100°C versus 110°C). These differences are acceptable for most applications where the EL1018-VG is specified.

Secondary Substitutes - TCLT1006 and TCLT1007: TCLT1006 and TCLT1007 provide alternative Current Transfer Ratio grades (100-300% and 80-160% respectively at 5mA). Both maintain 5000Vrms isolation, 50mA output current, and 4-SOP package compatibility. These parts are suitable when the specific CTR grade of EL1018-VG is not critical to circuit operation. TCLT1006 offers higher inventory availability (30944 Pcs) and TCLT1007 provides moderate inventory (32880 Pcs).

Extended Temperature Range Option - VOL617A-2X001T: VOL617A-2X001T maintains the full operating temperature range of EL1018-VG (-55°C to 110°C) and provides 80V maximum output voltage matching the original part. Current Transfer Ratio is 63-125% at 5mA, which differs from the EL1018-VG specification. This part is selected when extended temperature performance is required and CTR variation is acceptable.

High Inventory Availability - TCLT1002 and TCLT1003: TCLT1002 (143200 Pcs) and TCLT1003 (48579 Pcs) offer exceptional inventory levels. These parts operate at different CTR specifications measured at 10mA input current rather than 5mA. Selection of these parts requires confirmation that the application circuit operates at the specified input current level.

All recommended substitutes maintain Active product status, ROHS3 compliance, and MSL Level 1 rating consistent with the EL1018-VG.

Frequently Asked Questions (FAQ)

Q: Can TCLT1008 directly replace EL1018-VG in all applications?

A: TCLT1008 is functionally equivalent for applications where maximum output voltage of 70V and operating temperature maximum of 100°C are acceptable. The identical Current Transfer Ratio specification (130-260% at 5mA) ensures matching optical coupling performance. Applications requiring 80V output capability or operation above 100°C require alternative selection.

Q: What is the difference between Current Transfer Ratio specifications at 5mA versus 10mA?

A: Current Transfer Ratio (CTR) is measured at a specified input LED current. Parts specified at 5mA input current (EL1018-VG, TCLT1006, TCLT1008) have different CTR values than parts specified at 10mA input current (TCLT1002, TCLT1003). The measurement current directly affects the reported CTR percentage. Selection must match the application circuit's input current design point.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts use 4-SOP package format with gull wing leads suitable for surface mount assembly. Packaging options vary: some are supplied in Tape & Reel (TR), others in Cut Tape (CT) & Digi-Reel®. The physical component dimensions and PCB footprint remain compatible across all listed substitutes.

Q: Which substitute offers the best inventory availability?

A: TCLT1002 provides the highest inventory level at 143200 Pcs. TCLT1003 offers 48579 Pcs and TCLT1009 provides 39037 Pcs. These high-inventory options are suitable when CTR grade variation is acceptable for the application.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range affects substitution suitability. EL1018-VG operates to 110°C maximum, while most TCLT series parts operate to 100°C maximum. VOL617A series parts maintain the 110°C maximum. Applications requiring operation above 100°C must select VOL617A-1X001T or VOL617A-2X001T.

Q: What is the significance of Vce Saturation specification in substitution?

A: Vce Saturation (maximum collector-emitter saturation voltage) is 300mV across all listed substitutes except VOL617A series parts which specify 400mV maximum. This parameter affects output voltage swing and power dissipation. The 300mV specification is standard for TCLT series parts and acceptable for most applications.

Q: Can VOL617A parts substitute for TCLT parts?

A: VOL617A-1X001T and VOL617A-2X001T are functionally compatible substitutes with different Current Transfer Ratio grades and higher Vce Saturation (400mV). These parts are selected when extended temperature range (-55°C to 110°C) and 80V output voltage are required. The higher Vce Saturation may affect circuit performance in applications with tight output voltage specifications.

Q: How does Current Transfer Ratio affect circuit design?

A: Current Transfer Ratio determines the optical coupling efficiency between input LED and output transistor. Higher CTR (e.g., TCLT1009 at 200-400%) requires less input current for a given output current. Lower CTR (e.g., VOL617A-1X001T at 40-80%) requires higher input current. Circuit design must account for the selected part's CTR specification to ensure adequate output current drive capability.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts are RoHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the EL1018-VG specification. This ensures compatibility with modern manufacturing processes and environmental regulations.

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