EL816(X) Optoisolator Equivalent & Substitute Parts

Part Overview

The EL816(X) is an optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides 5000Vrms isolation in a 4-DIP through-hole package, designed for single-channel DC input applications with 50mA output current capability. The part is currently active in production with 5200 units in stock. Substitute parts are identified based on matching electrical isolation ratings, output characteristics, package compatibility, and operational temperature ranges.

Key Parameters

Parameter	Value
Voltage - Isolation	5000Vrms
Number of Channels	1
Output Type	Transistor
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Operating Temperature	-55°C ~ 110°C
Mounting Type	Through Hole
Package / Case	4-DIP (0.300", 7.62mm)
Input Type	DC
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the EL816(X) are qualified based on the following criteria:

Electrical Compatibility Requirements:

Voltage isolation rating of 5000Vrms
Single channel configuration
Transistor output type
Maximum output voltage of 80V
Output current capacity of 50mA
DC input type
Operating temperature range of -55°C to 110°C

Mechanical Compatibility Requirements:

4-DIP package footprint (0.300", 7.62mm)
Through-hole mounting type

Compliance Requirements:

RoHS3 or RoHS Compliant status
Moisture Sensitivity Level 1 (Unlimited)

The substitute parts are grouped into two categories: through-hole 4-DIP variants and surface-mount 4-SMD variants. Through-hole substitutes maintain direct pin-compatible replacement capability. The surface-mount variant requires PCB layout modification but offers equivalent electrical performance.

Parameter Comparison

Parameter	EL816(X)	TLP785(Y,F)	TLP785(F)	TLP785(GR-TP6,F)
Manufacturer	Everlight Electronics	Toshiba Semiconductor	Toshiba Semiconductor	Toshiba Semiconductor
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Number of Channels	1	1	1	1
Current Transfer Ratio (Min)	100% @ 5mA	50% @ 5mA	50% @ 5mA	100% @ 5mA
Current Transfer Ratio (Max)	200% @ 5mA	150% @ 5mA	600% @ 5mA	300% @ 5mA
Rise / Fall Time (Typ)	4µs, 3µs	2µs, 3µs	2µs, 3µs	2µs, 3µs
Voltage - Output (Max)	80V	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.2V	1.15V	1.15V	1.15V
Vce Saturation (Max)	200mV	400mV	400mV	400mV
Operating Temperature	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C
Mounting Type	Through Hole	Through Hole	Through Hole	Surface Mount
Package / Case	4-DIP	4-DIP	4-DIP	4-SMD
RoHS Status	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	RoHS Compliant
Inventory	5200 Pcs	966 Pcs	2332 Pcs	13874 Pcs

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (Through-Hole 4-DIP):

TLP785(F) and TLP785(Y,F) are through-hole 4-DIP alternatives to EL816(X). Both maintain identical package footprint and mounting type. TLP785(F) offers higher maximum current transfer ratio (600% @ 5mA) and lower forward voltage (1.15V typical). TLP785(Y,F) provides narrower current transfer ratio range (50-150% @ 5mA) with identical forward voltage characteristics. Both parts are RoHS compliant and rated for -55°C to 110°C operation.

For Surface-Mount Applications:

TLP785(GR-TP6,F) is a 4-SMD surface-mount variant with identical electrical specifications to the through-hole alternatives. This part requires PCB layout modification and surface-mount assembly processes. Current transfer ratio range is 100-300% @ 5mA. Inventory availability is highest among substitute options at 13874 units.

Compliance Considerations:

All substitute parts maintain RoHS compliance and Moisture Sensitivity Level 1 rating. EL816(X) is ROHS3 compliant; substitute parts are RoHS compliant. Both compliance levels are acceptable for equivalent substitution in this product category.

Frequently Asked Questions (FAQ)

Q: Can TLP785(F) directly replace EL816(X) in existing PCB designs?

A: Yes. TLP785(F) maintains identical 4-DIP through-hole package dimensions (0.300", 7.62mm) and pin configuration. No PCB layout modification is required. Electrical parameters including 5000Vrms isolation, 80V maximum output voltage, and 50mA output current are equivalent.

Q: What is the difference between TLP785(Y,F) and TLP785(F)?

A: Both are 4-DIP through-hole packages with identical physical dimensions and mounting type. The primary difference is current transfer ratio specification: TLP785(Y,F) ranges from 50-150% @ 5mA, while TLP785(F) ranges from 50-600% @ 5mA. Forward voltage and saturation voltage characteristics are identical at 1.15V and 400mV respectively.

Q: Why would I select TLP785(GR-TP6,F) over through-hole alternatives?

A: TLP785(GR-TP6,F) is a surface-mount 4-SMD variant suitable for automated assembly processes. Selection requires PCB redesign for SMD footprint compatibility. Electrical performance is equivalent to through-hole variants. Inventory availability is significantly higher (13874 units).

Q: Are there differences in switching speed between EL816(X) and TLP785 variants?

A: Rise and fall times differ slightly. EL816(X) specifies 4µs rise time and 3µs fall time. All TLP785 variants specify 2µs rise time and 3µs fall time. Both meet the same operating temperature range of -55°C to 110°C.

Q: What is the significance of the Vce Saturation difference?

A: EL816(X) specifies maximum Vce saturation of 200mV, while all TLP785 variants specify 400mV maximum. This parameter affects output voltage drop during transistor saturation. Applications requiring lower saturation voltage should verify circuit tolerance before substitution.

Q: Are all substitute parts RoHS compliant?

A: Yes. EL816(X) is ROHS3 compliant. All TLP785 variants are RoHS compliant. Both compliance standards are acceptable for equivalent component substitution in this category.

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