EL814S1(TA) Equivalent & Substitute Parts

Part Overview

The EL814S1(TA) is a 5000Vrms optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides galvanic isolation for AC and DC input signals with a single-channel transistor output configuration in a 4-SMD surface mount package.

The EL814S1(TA) is discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute parts must maintain electrical compatibility across isolation voltage, input/output characteristics, and thermal operating range.

Key Parameters

Parameter	Value
Voltage - Isolation	5000Vrms
Number of Channels	1
Output Type	Transistor
Input Type	AC, DC
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
Vce Saturation (Max)	200mV
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the EL814S1(TA) are identified based on the following critical parameters:

Mandatory Matching Criteria:

Voltage - Isolation: 5000Vrms
Number of Channels: 1
Output Type: Transistor
Input Type: AC, DC
Package / Case: 4-SMD, Gull Wing
Mounting Type: Surface Mount
Vce Saturation (Max): 200mV
RoHS Status: ROHS3 Compliant

Substitute Parts Identified:

The LTV-814HS and LTV-814HS-TA1 (both manufactured by Lite-On Inc.) meet all mandatory matching criteria. These parts differ from the main part in packaging format (Tube and Tape & Reel respectively) and certain electrical performance characteristics, but maintain functional equivalence for the specified isolation and switching requirements.

Parameter Comparison

Parameter	EL814S1(TA)	LTV-814HS	LTV-814HS-TA1
Manufacturer	Everlight Electronics Co Ltd	Lite-On Inc.	Lite-On Inc.
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms
Number of Channels	1	1	1
Output Type	Transistor	Transistor	Transistor
Input Type	AC, DC	AC, DC	AC, DC
Voltage - Output (Max)	80V	35V	35V
Current Transfer Ratio (Min)	20% @ 1mA	20% @ 100mA	20% @ 100mA
Current Transfer Ratio (Max)	300% @ 1mA	80% @ 100mA	80% @ 100mA
Rise / Fall Time (Typ)	7µs, 11µs	4µs, 3µs	4µs, 3µs
Voltage - Forward (Vf) (Typ)	1.2V	1.4V	1.4V
Current - DC Forward (If) (Max)	60 mA	150 mA	150 mA
Vce Saturation (Max)	200mV	200mV	200mV
Operating Temperature	-55°C ~ 110°C	-30°C ~ 100°C	-30°C ~ 100°C
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
Packaging Format	Not specified	Tube	Tape & Reel (TR)
Product Status	Discontinued at DiGi Electronics	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

LTV-814HS (Tube Packaging): This substitute is suitable for applications where the EL814S1(TA) is no longer available. The LTV-814HS maintains the same isolation voltage, package footprint, and saturation voltage. The component is in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Inventory availability is 16,958 pieces.

LTV-814HS-TA1 (Tape & Reel Packaging): This variant provides the same electrical and compliance characteristics as the LTV-814HS but in Tape & Reel format suitable for automated assembly processes. Product status is active with 2,200 pieces in stock. ROHS3 compliance and REACH Unaffected status are confirmed.

Selection Basis: Both substitute parts are selected based on active product status, ROHS3 compliance certification, and matching isolation voltage and package specifications. The LTV-814HS-TA1 is recommended for high-volume production requiring automated component placement. The LTV-814HS is suitable for lower-volume applications or manual assembly processes.

Frequently Asked Questions (FAQ)

Q: Can LTV-814HS or LTV-814HS-TA1 be used as direct replacements for EL814S1(TA)?

A: Both LTV-814HS and LTV-814HS-TA1 are functionally equivalent substitutes. They maintain the same 5000Vrms isolation voltage, single-channel transistor output, 4-SMD gull wing package footprint, and 200mV maximum saturation voltage. The primary differences are packaging format (Tube vs. Tape & Reel) and operating temperature range (-30°C to 100°C versus -55°C to 110°C).

Q: What are the key electrical differences between EL814S1(TA) and the substitute parts?

A: The EL814S1(TA) has a maximum output voltage of 80V compared to 35V for the LTV-814HS and LTV-814HS-TA1. The EL814S1(TA) exhibits higher current transfer ratio (300% maximum at 1mA) versus 80% maximum at 100mA for the substitutes. The LTV-814HS variants have faster rise and fall times (4µs and 3µs respectively) compared to the EL814S1(TA) (7µs and 11µs).

Q: Are there packaging considerations when selecting between LTV-814HS and LTV-814HS-TA1?

A: The LTV-814HS is supplied in Tube packaging, suitable for manual component handling and lower-volume applications. The LTV-814HS-TA1 is supplied in Tape & Reel format, designed for automated pick-and-place assembly equipment. Selection depends on production volume and assembly methodology.

Q: Do the substitute parts meet the same compliance standards as the EL814S1(TA)?

A: Both LTV-814HS and LTV-814HS-TA1 are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the EL814S1(TA) compliance profile. The LTV-814HS-TA1 additionally confirms REACH Unaffected status.

Q: What is the operating temperature range difference, and does it affect substitution?

A: The EL814S1(TA) operates from -55°C to 110°C, while both LTV-814HS variants operate from -30°C to 100°C. Applications requiring operation below -30°C or above 100°C cannot use the substitute parts. Applications within the -30°C to 100°C range are compatible with both the original and substitute components.

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