EL814S(TB) Optoisolator - Equivalent & Substitute Parts

Part Overview

The EL814S(TB) 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 configuration in a 4-SMD surface mount package. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production needs.

Key Parameters

Parameter	EL814S(TB)
Manufacturer	Everlight Electronics Co Ltd
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Output Type	Transistor
Input Type	AC, DC
Voltage - Output (Max)	80V
Vce Saturation (Max)	200mV
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
Operating Temperature	-55°C ~ 110°C
RoHS Status	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution eligibility for the EL814S(TB) is determined by the following critical parameters:

Mandatory Matching Criteria:

Voltage - Isolation: 5000Vrms
Output Type: Transistor
Number of Channels: 1
Input Type: AC, DC
Package / Case: 4-SMD, Gull Wing
Mounting Type: Surface Mount

Allowable Parameter Variations: Substitute parts may differ in Current Transfer Ratio specifications, Rise/Fall Time characteristics, maximum output voltage, output current capacity, forward voltage, and operating temperature range, provided the mandatory criteria are met and the substitute maintains functional compatibility within the application circuit.

The identified substitute parts LTV-814HS and LTV-814HS-TA1 (both manufactured by Lite-On Inc.) satisfy all mandatory matching criteria and are classified as direct functional equivalents.

Parameter Comparison

Parameter	EL814S(TB)	LTV-814HS	LTV-814HS-TA1
Manufacturer	Everlight Electronics Co Ltd	Lite-On Inc.	Lite-On Inc.
Number of Channels	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms
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
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics	Active	Active
Packaging	Not specified	Tube	Tape & Reel (TR)

Engineering Selection Recommendations

LTV-814HS and LTV-814HS-TA1 Suitability:

Both LTV-814HS variants are active products manufactured by Lite-On Inc. and maintain full compliance with ROHS3 standards. These parts are functionally equivalent to the discontinued EL814S(TB) across all mandatory isolation, channel, package, and mounting specifications.

Packaging Consideration:

LTV-814HS is supplied in Tube packaging, while LTV-814HS-TA1 is supplied in Tape & Reel (TR) format. Selection between these two variants depends on production volume and assembly line requirements rather than electrical performance.

Parameter Differences:

The LTV-814 series exhibits lower maximum output voltage (35V versus 80V) and different current transfer ratio characteristics at higher forward current levels (100mA versus 1mA test conditions). Applications requiring the full 80V output capability of the EL814S(TB) must evaluate circuit-level compatibility with the 35V maximum output of the LTV-814 series.

The LTV-814 series provides faster rise and fall times (4µs and 3µs respectively) compared to the EL814S(TB) (7µs and 11µs), which may benefit high-speed switching applications.

Operating temperature range of the LTV-814 series (-30°C ~ 100°C) is narrower than the EL814S(TB) (-55°C ~ 110°C). Applications requiring extended low-temperature operation below -30°C must confirm compatibility.

Frequently Asked Questions (FAQ)

Q: Can LTV-814HS directly replace EL814S(TB) in all applications?

A: LTV-814HS and LTV-814HS-TA1 are functionally equivalent for isolation voltage, channel count, package type, and mounting configuration. However, circuit-level evaluation is required for applications utilizing the full 80V maximum output voltage specification of the EL814S(TB), as the LTV-814 series is rated to 35V maximum output.

Q: What is the difference between LTV-814HS and LTV-814HS-TA1?

A: Both parts are electrically identical. The difference is packaging format: LTV-814HS is supplied in Tube packaging, while LTV-814HS-TA1 is supplied in Tape & Reel (TR) format. Selection depends on production volume and assembly equipment compatibility.

Q: Are there temperature range limitations when substituting with LTV-814HS?

A: Yes. The LTV-814HS operating temperature range is -30°C ~ 100°C, compared to -55°C ~ 110°C for the EL814S(TB). Applications requiring operation below -30°C or above 100°C must confirm compatibility with the narrower temperature specification.

Q: How do the current transfer ratio specifications differ?

A: The EL814S(TB) specifies Current Transfer Ratio at 1mA input current (20% minimum, 300% maximum), while the LTV-814 series specifies at 100mA input current (20% minimum, 80% maximum). These are measured at different operating points and reflect different device characteristics.

Q: What is the impact of the 35V versus 80V maximum output voltage difference?

A: Applications designed for the full 80V output capability of the EL814S(TB) must evaluate whether the 35V maximum output of the LTV-814 series is sufficient for the circuit design. This is a circuit-level consideration dependent on the specific application requirements.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both LTV-814HS and LTV-814HS-TA1 are ROHS3 compliant, matching the compliance status of the EL814S(TB).

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message