EL817(M)(B))-V Optoisolator Equivalent & Substitute Parts

Part Overview

The EL817(M)(B))-V is an optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides galvanic isolation up to 5000Vrms and is designed for applications requiring DC input control with transistor output switching. The part is currently in active production status with 871 pieces available in new original inventory.

Substitute parts are identified when equivalent electrical performance, isolation rating, output characteristics, and mechanical compatibility are maintained across the specified parameter range. This reference enables component selection flexibility while preserving circuit functionality and reliability.

Key Parameters

Parameter	Value	Unit
Voltage - Isolation	5000	Vrms
Number of Channels	1	—
Current Transfer Ratio (Min)	130	% @ 5mA
Current Transfer Ratio (Max)	260	% @ 5mA
Output Type	Transistor	—
Voltage - Output (Max)	35	V
Current - Output / Channel	50	mA
Vce Saturation (Max)	200	mV
Operating Temperature Range	-55 to 110	°C
Package / Case	4-DIP (0.400", 10.16mm)	—
Mounting Type	Through Hole	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the EL817(M)(B))-V is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Voltage isolation rating: 5000Vrms (mandatory match)
Number of channels: 1 (mandatory match)
Current transfer ratio range: 130% to 260% @ 5mA (mandatory match)
Output type: Transistor (mandatory match)
Maximum output voltage: 35V (mandatory match)
Maximum output current per channel: 50mA (mandatory match)
Vce saturation: 200mV maximum (mandatory match)

Mechanical Equivalence Criteria:

Package type: 4-DIP form factor (mandatory match)
Mounting method: Through Hole (mandatory match)
Physical dimensions: 0.400" / 10.16mm (mandatory match)

Compliance Criteria:

RoHS3 compliance status (mandatory match)
Operating temperature range: -55°C to 110°C (mandatory match)

The substitute part 140817141210 (Würth Elektronik WL-OCPT series) meets all mandatory electrical, mechanical, and compliance criteria and is therefore classified as a parametric equivalent.

Parameter Comparison

Parameter	EL817(M)(B))-V (Everlight)	140817141210 (Würth Elektronik)	Match Status
Voltage - Isolation	5000 Vrms	5000 Vrms	Equivalent
Number of Channels	1	1	Equivalent
Current Transfer Ratio (Min)	130% @ 5mA	130% @ 5mA	Equivalent
Current Transfer Ratio (Max)	260% @ 5mA	260% @ 5mA	Equivalent
Output Type	Transistor	Transistor	Equivalent
Voltage - Output (Max)	35 V	35 V	Equivalent
Current - Output / Channel	50 mA	50 mA	Equivalent
Voltage - Forward (Vf) (Typ)	1.2 V	1.24 V	Within tolerance
Current - DC Forward (If) (Max)	60 mA	60 mA	Equivalent
Vce Saturation (Max)	200 mV	200 mV	Equivalent
Rise / Fall Time (Typ)	4µs, 3µs	3µs, 4µs	Equivalent
Operating Temperature	-55°C to 110°C	-55°C to 110°C	Equivalent
Package / Case	4-DIP (0.400", 10.16mm)	4-DIP (0.400", 10.16mm)	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

Primary Selection (EL817(M)(B))-V):

Active production status with established supply chain
871 pieces in new original inventory
ROHS3 compliant
Moisture sensitivity level 1 (unlimited shelf life)

Substitute Selection (140817141210):

Active production status with established supply chain
1069 pieces in new original inventory
ROHS3 compliant
Moisture sensitivity level 1 (unlimited shelf life)
REACH unaffected status documented
Würth Elektronik WL-OCPT series designation

Both parts satisfy all mandatory electrical, mechanical, and compliance requirements. Selection between these parts is based on availability, supply chain preference, and inventory position. No performance degradation occurs when substituting between these components within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can the 140817141210 directly replace the EL817(M)(B))-V in existing designs?

A: Yes. Both components share identical electrical specifications for isolation voltage (5000Vrms), current transfer ratio (130-260% @ 5mA), output voltage (35V max), output current (50mA), and saturation voltage (200mV max). Both use the 4-DIP through-hole package with identical physical dimensions. No circuit modifications are required.

Q: Are there differences in rise and fall times between these parts?

A: Rise and fall times are specified as 4µs and 3µs for the EL817(M)(B))-V, and 3µs and 4µs for the 140817141210. These values are within equivalent performance ranges for typical optoisolator applications and do not constitute a functional difference.

Q: What is the significance of the forward voltage difference (1.2V vs 1.24V)?

A: The forward voltage difference of 0.04V is within normal manufacturing tolerance for optoisolator LED inputs. This variation does not affect circuit operation when input current is controlled within the specified 60mA maximum rating.

Q: Are both parts suitable for long-term storage?

A: Yes. Both components have moisture sensitivity level 1 (unlimited), indicating no time-dependent moisture absorption concerns. Storage conditions should follow standard electronic component guidelines.

Q: What compliance certifications apply to both parts?

A: Both the EL817(M)(B))-V and 140817141210 are ROHS3 compliant. The 140817141210 additionally carries REACH unaffected status. Both are classified under ECCN EAR99 and HTSUS 8541.49.8000.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. Identical 4-DIP package dimensions (0.400" / 10.16mm) and through-hole mounting ensure direct PCB footprint compatibility. No layout modifications are necessary when substituting between these components.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message