EL815 Optoisolator Equivalent & Substitute Parts

Part Overview

The EL815 is an active optoisolator manufactured by Everlight Electronics Co Ltd, designed for high-voltage isolation applications. This component features Darlington output configuration with 5000Vrms isolation voltage rating and is housed in a 4-DIP through-hole package. The part is currently in active production status with 1390 units in stock.

Substitute parts are identified when equivalent electrical and mechanical parameters are available from alternative manufacturers, enabling procurement flexibility and supply chain continuity without redesign requirements.

Key Parameters

Parameter	Value
Part Number	EL815
Manufacturer	Everlight Electronics Co Ltd
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	600% @ 1mA
Current Transfer Ratio (Max)	7500% @ 1mA
Output Type	Darlington
Voltage - Output (Max)	35V
Current - Output / Channel	80mA
Vce Saturation (Max)	1V
Operating Temperature	-55°C ~ 110°C
Package / Case	4-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the EL815 optoisolator is determined by the following critical parameters:

Electrical Equivalence Criteria:

Voltage isolation rating: 5000Vrms (exact match required)
Number of channels: 1 (exact match required)
Output configuration: Darlington (exact match required)
Current transfer ratio range: 600% to 7500% @ 1mA (exact match required)
Maximum output voltage: 35V (exact match required)
Maximum output current per channel: 80mA (exact match required)
Vce saturation: 1V maximum (exact match required)

Mechanical Equivalence Criteria:

Package type: 4-DIP (0.300", 7.62mm) (exact match required)
Mounting type: Through Hole (exact match required)

Compliance Criteria:

RoHS3 compliance status (required for regulated applications)
Product status: Active (current production availability)

The LTV-815 manufactured by Lite-On Inc. meets all electrical and mechanical equivalence criteria and maintains active product status with RoHS3 compliance.

Parameter Comparison

Parameter	EL815 (Everlight)	LTV-815 (Lite-On)	Match Status
Number of Channels	1	1	Equivalent
Voltage - Isolation	5000Vrms	5000Vrms	Equivalent
Current Transfer Ratio (Min)	600% @ 1mA	600% @ 1mA	Equivalent
Current Transfer Ratio (Max)	7500% @ 1mA	7500% @ 1mA	Equivalent
Output Type	Darlington	Darlington	Equivalent
Voltage - Output (Max)	35V	35V	Equivalent
Current - Output / Channel	80mA	80mA	Equivalent
Voltage - Forward (Vf) (Typ)	1.2V	1.2V	Equivalent
Vce Saturation (Max)	1V	1V	Equivalent
Rise / Fall Time (Typ)	60µs, 53µs	60µs, 53µs	Equivalent
Package / Case	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Operating Temperature	-55°C ~ 110°C	-30°C ~ 100°C	EL815 has wider range
Current - DC Forward (If) (Max)	60 mA	50 mA	EL815 rated higher
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

Primary Selection (EL815 - Everlight Electronics): The EL815 is the specified component with active production status and ROHS3 compliance. This part provides the widest operating temperature range (-55°C to 110°C) and higher maximum DC forward current rating (60 mA), making it suitable for applications requiring extended temperature performance or higher input current margins.

Substitute Selection (LTV-815 - Lite-On Inc.): The LTV-815 is a direct electrical and mechanical equivalent with identical isolation voltage, channel configuration, output type, and current transfer ratio specifications. This part maintains active production status and ROHS3 compliance. The operating temperature range (-30°C to 100°C) is narrower than the EL815, and the maximum DC forward current is rated at 50 mA. The LTV-815 is suitable for applications within its specified temperature range where the input current requirement does not exceed 50 mA.

Both parts are suitable for direct substitution in 4-DIP through-hole PCB designs requiring 5000Vrms isolation with Darlington output configuration, provided application temperature and input current requirements fall within the respective part specifications.

Frequently Asked Questions (FAQ)

Q: Can the LTV-815 be used as a direct replacement for the EL815 in all applications?

A: The LTV-815 is electrically and mechanically equivalent to the EL815 for all specified parameters. However, application-specific requirements must be verified. The LTV-815 operating temperature range (-30°C to 100°C) is narrower than the EL815 (-55°C to 110°C). Applications requiring operation below -30°C or above 100°C must use the EL815. Additionally, the LTV-815 maximum DC forward current is 50 mA compared to 60 mA for the EL815; applications requiring input current above 50 mA must use the EL815.

Q: Are both parts pin-compatible?

A: Yes. Both the EL815 and LTV-815 use identical 4-DIP (0.300", 7.62mm) through-hole packaging with the same pin configuration. No PCB layout modifications are required for substitution.

Q: What is the isolation voltage rating, and is it the same for both parts?

A: Both parts provide 5000Vrms isolation voltage rating. This specification is identical across both components.

Q: Are both parts RoHS compliant?

A: Yes. Both the EL815 and LTV-815 are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components.

Q: What is the current transfer ratio specification?

A: Both parts specify a current transfer ratio range of 600% minimum to 7500% maximum at 1 mA input current. This parameter is identical for both components.

Q: Can these parts be used in high-temperature applications?

A: The EL815 supports operation from -55°C to 110°C, making it suitable for extended high-temperature applications. The LTV-815 supports operation from -30°C to 100°C. Application temperature requirements must be verified against the selected part's operating range.

Q: What is the maximum output current per channel?

A: Both parts are rated for 80 mA maximum output current per channel. This specification is identical for both components.

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