EL817M(D)-V Optoisolator Equivalent & Substitute Parts

Part Overview

The EL817M(D)-V is an 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 package. The part is currently active in production with 953 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring optoisolation in DC input circuits with transistor output stages.

Substiute Parts

EL817M(D)-V

Everlight Electronics Co LtdIn Stock: 1042EL817M(D)-V Datasheet

Current PartRFQ

140817141410

Würth ElektronikIn Stock: 956140817141410 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the EL817M(D)-V is determined by strict equivalence across the following critical parameters:

Isolation Voltage: 5000Vrms isolation rating is the primary functional requirement for galvanic separation in the application circuit.

Channel Configuration: Single channel (1 channel) limits substitutes to single-channel optoisolators only.

Current Transfer Ratio: Minimum 300% and maximum 600% @ 5mA defines the optical coupling efficiency and input-to-output signal transfer characteristics.

Output Stage Type: Transistor output configuration determines the switching behavior and load-driving capability.

Maximum Output Voltage & Current: 35V maximum output voltage and 50mA per channel output current establish the load-handling specifications.

Saturation Voltage: 200mV maximum Vce saturation defines the on-state voltage drop across the output transistor.

Package & Mounting: 4-DIP through-hole package with 0.400" (10.16mm) body dimensions ensures mechanical and electrical compatibility with existing PCB layouts.

Temperature Range: -55°C to 110°C operating temperature establishes environmental operating limits.

Compliance: ROHS3 compliance and active product status ensure regulatory alignment and supply availability.

The substitute part 140817141410 (Würth Elektronik WL-OCPT series) meets all these criteria within the specified tolerances.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - EL817M(D)-V (Everlight Electronics): Active product status with 953 units in current inventory. ROHS3 compliant. Established supply chain availability.

Substitute Selection - 140817141410 (Würth Elektronik WL-OCPT): Active product status with 936 units in current inventory. ROHS3 compliant with additional REACH Unaffected certification. Parametrically equivalent across all critical electrical and mechanical specifications. Forward voltage (Vf) of 1.24V is within acceptable tolerance relative to the 1.2V typical value of the primary part. Rise and fall times are transposed (3µs rise vs. 4µs rise on primary) but remain within equivalent performance envelope for DC input optoisolation applications.

Both parts are suitable for direct substitution in applications requiring single-channel optoisolation at 5000Vrms with transistor output in 4-DIP through-hole packages. Selection between the two should be based on procurement lead time, inventory availability, and supplier relationship requirements.

Frequently Asked Questions (FAQ)

Q: Can the 140817141410 be used as a direct replacement for the EL817M(D)-V?

A: Yes. The 140817141410 meets all critical electrical and mechanical parameters specified for the EL817M(D)-V. Both parts provide 5000Vrms isolation, single-channel transistor output, 300-600% current transfer ratio, 35V maximum output voltage, 50mA output current, and identical 4-DIP through-hole packaging. The parts are parametrically equivalent.

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

A: The EL817M(D)-V specifies 4µs rise time and 3µs fall time. The 140817141410 specifies 3µs rise time and 4µs fall time. Both configurations are within the same performance envelope for DC input optoisolation circuits and do not affect functional compatibility.

Q: What is the significance of the forward voltage (Vf) difference?

A: The EL817M(D)-V has a typical forward voltage of 1.2V, while the 140817141410 is 1.24V. This 0.04V difference is negligible in DC input circuits and does not impact circuit operation or component selection.

Q: Are both parts ROHS3 compliant?

A: Yes. Both the EL817M(D)-V and 140817141410 are ROHS3 compliant. The 140817141410 additionally carries REACH Unaffected certification.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. Both parts use identical 4-DIP through-hole packaging with 0.400" (10.16mm) body dimensions and the same pin configuration. No PCB layout modifications are required for substitution.

Q: What is the operating temperature range for both parts?

A: Both the EL817M(D)-V and 140817141410 operate across -55°C to 110°C, providing equivalent thermal performance specifications.

Q: Are there any electrical parameter differences that would affect circuit design?

A: No. All critical electrical parameters—isolation voltage, current transfer ratio, output voltage and current ratings, and saturation voltage—are identical between the two parts. Circuit design remains unchanged.