EL814 Optoisolator Equivalent & Substitute Parts

Part Overview

The EL814 is an active optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides galvanic isolation up to 5000Vrms with a single channel configuration in a 4-DIP through-hole package. The device accepts both AC and DC input signals and delivers transistor-based output suitable for logic-level switching applications.

The EL814 maintains active product status with substantial inventory availability. Substitute parts are identified based on matching isolation voltage, channel count, package type, and output characteristics to ensure functional equivalence in circuit applications.

Key Parameters

Parameter	Value
Isolation Voltage	5000Vrms
Number of Channels	1
Output Type	Transistor
Input Type	AC, DC
Package Type	4-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Current Transfer Ratio (Min)	20% @ 1mA
Current Transfer Ratio (Max)	300% @ 1mA
Operating Temperature Range	-55°C ~ 110°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the EL814 are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Isolation voltage: 5000Vrms
Channel configuration: 1 channel
Output type: Transistor
Package: 4-DIP through-hole
Input compatibility: AC/DC capable
Current transfer ratio range: 20% to 300% @ 1mA

Secondary Compatibility Factors:

Operating temperature range (minimum -30°C or lower acceptable)
Vce saturation characteristics (200mV maximum)
Forward voltage (1.2V typical)
RoHS3 compliance
MSL rating of 1

The LTV-814 manufactured by Lite-On Inc. meets all primary matching criteria and maintains compatibility across secondary factors, establishing it as a direct substitute for the EL814 in applications requiring 5kV isolation with single-channel transistor output in 4-DIP packaging.

Parameter Comparison

Parameter	EL814 (Everlight)	LTV-814 (Lite-On)	Compatibility
Isolation Voltage	5000Vrms	5000Vrms	Matched
Number of Channels	1	1	Matched
Output Type	Transistor	Transistor	Matched
Input Type	AC, DC	AC, DC	Matched
Package / Case	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	Matched
Mounting Type	Through Hole	Through Hole	Matched
Current Transfer Ratio (Min)	20% @ 1mA	20% @ 1mA	Matched
Current Transfer Ratio (Max)	300% @ 1mA	300% @ 1mA	Matched
Rise / Fall Time (Typ)	7µs, 11µs	4µs, 3µs	LTV-814 faster
Voltage - Output (Max)	80V	35V	EL814 higher rating
Current - Output / Channel	Not specified	50mA	LTV-814 specified
Voltage - Forward (Vf) (Typ)	1.2V	1.2V	Matched
Current - DC Forward (If) (Max)	60mA	50mA	EL814 higher rating
Vce Saturation (Max)	200mV	200mV	Matched
Operating Temperature	-55°C ~ 110°C	-30°C ~ 110°C	EL814 wider range
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Matched

Engineering Selection Recommendations

EL814 (Everlight Electronics) is the primary component choice when:

Operating temperature range must extend to -55°C minimum
Maximum output voltage rating of 80V is required
Maximum forward current of 60mA is required
Slower switching response (7µs rise, 11µs fall) is acceptable

LTV-814 (Lite-On Inc.) is a suitable substitute when:

Operating temperature minimum of -30°C is sufficient
Output voltage requirement does not exceed 35V
Output current requirement does not exceed 50mA
Faster switching response (4µs rise, 3µs fall) is beneficial
Component availability or supply chain considerations favor Lite-On sourcing

Both parts maintain ROHS3 compliance and MSL rating of 1, ensuring compatibility with standard manufacturing and storage protocols. Both are active products with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the LTV-814 replace the EL814 in all applications?

A: The LTV-814 is a functional substitute for applications where the operating temperature range of -30°C to 110°C is acceptable and output voltage does not exceed 35V. Applications requiring -55°C operation or 80V output capability require the EL814.

Q: What are the key differences between these optoisolators?

A: The primary differences are operating temperature range (EL814 extends to -55°C), maximum output voltage (EL814 rated 80V versus LTV-814 at 35V), maximum forward current (EL814 at 60mA versus LTV-814 at 50mA), and switching speed (LTV-814 is faster with 4µs/3µs rise/fall times versus EL814 at 7µs/11µs).

Q: Are the packages physically identical?

A: Both the EL814 and LTV-814 use 4-DIP through-hole packages with 0.300" (7.62mm) spacing, ensuring identical PCB footprint and mounting compatibility.

Q: Do both parts meet the same compliance standards?

A: Both the EL814 and LTV-814 are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity level), meeting equivalent environmental and regulatory requirements.

Q: Which part should be selected for new designs?

A: Component selection depends on specific application requirements. Verify that the operating temperature range, maximum output voltage, and switching speed requirements of the application are met by the selected part before implementation.

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