EL4502M Optoisolator Equivalent & Substitute Parts

Part Overview

The EL4502M is a single-channel optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides 5000Vrms isolation and is designed for DC input applications requiring galvanic isolation in 8-DIP through-hole packages. The part is currently in active production status with 757 units in stock. Equivalent and substitute parts are identified based on matching electrical isolation ratings, channel configuration, output type, package form factor, and operating temperature range to ensure direct functional replacement in circuit applications.

Substiute Parts

EL4502M

Everlight Electronics Co LtdIn Stock: 859EL4502M Datasheet

Current PartRFQ

6N135G

Isocom Components 2004 LTDIn Stock: 9006N135G Datasheet

SimilarRFQ

6N136G

Isocom Components 2004 LTDIn Stock: 10706N136G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EL4502M are qualified based on the following critical parameters that determine functional equivalence:

Isolation Voltage: All substitutes maintain 5000Vrms isolation rating, matching the primary isolation specification.

Channel Configuration: Single-channel topology is preserved across all substitute parts.

Package Form Factor: All substitutes use 8-DIP (0.400", 10.16mm) through-hole packaging, ensuring mechanical and electrical compatibility with existing PCB layouts.

Input Type: DC input specification is maintained across all parts.

Output Type: The EL4502M features transistor output. Substitute parts 6N135G and 6N136G feature transistor with base output, which is functionally compatible for applications requiring base access.

Operating Temperature Range: All substitutes operate within -55°C ~ 100°C, matching the thermal specification.

Voltage and Current Ratings: Maximum output voltage (20V) and per-channel output current (8mA) are identical across all parts.

Compliance: All substitutes maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating.

The substitutes differ in Current Transfer Ratio minimum specifications and output type configuration (base access availability), which may affect circuit design requirements but do not prevent functional substitution in applications where these differences are acceptable.

Parameter Comparison

Engineering Selection Recommendations

EL4502M (Primary Part): Everlight Electronics EL4502M is the original specification component. Current production status is active with 757 units in stock. ROHS3 compliance and MSL Level 1 rating confirm suitability for standard manufacturing environments.

6N136G (Preferred Substitute): Isocom Components 6N136G provides the closest electrical match to the EL4502M. Current Transfer Ratio minimum specification (19% @ 16mA) matches the primary part exactly. Transistor with base output configuration provides additional circuit design flexibility. Active production status with 1042 units in stock ensures availability. ROHS3 compliance and REACH Unaffected status confirm regulatory alignment.

6N135G (Alternative Substitute): Isocom Components 6N135G maintains all critical isolation, package, and thermal specifications. Current Transfer Ratio minimum specification (7% @ 16mA) is lower than the primary part, which may require circuit design verification in applications with tight gain margin requirements. Transistor with base output provides design flexibility. Active production status with 808 units in stock. ROHS3 compliance and REACH Unaffected status confirmed.

All three parts are suitable for direct PCB substitution without layout modification due to identical 8-DIP package specifications. Selection between substitutes depends on Current Transfer Ratio requirements and whether base access is required in the application circuit.

Frequently Asked Questions (FAQ)

Q: Can 6N135G and 6N136G be used interchangeably with EL4502M?

A: Both Isocom parts are functionally compatible substitutes. The primary difference is Current Transfer Ratio minimum specification. 6N136G matches the EL4502M at 19% minimum, while 6N135G specifies 7% minimum. Circuit designs with tight gain margin requirements should use 6N136G. Both parts feature transistor with base output, which is compatible with standard transistor output applications.

Q: What is the significance of "Transistor with Base" output versus standard "Transistor" output?

A: Both output types are functionally equivalent for standard optoisolator applications. Transistor with base output provides access to the base terminal, allowing additional circuit design options such as base current control or biasing adjustments. Standard transistor output applications can use transistor with base parts without modification.

Q: Are all three parts suitable for the same PCB layout?

A: Yes. All three parts use identical 8-DIP (0.400", 10.16mm) through-hole packaging. No PCB layout changes are required for substitution.

Q: What compliance certifications apply to these parts?

A: All three parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating. The Isocom parts (6N135G and 6N136G) are additionally REACH Unaffected. All parts are classified as EAR99 for export control purposes.

Q: Are there inventory differences between the three parts?

A: Yes. Current stock levels are: EL4502M (757 units), 6N135G (808 units), and 6N136G (1042 units). All parts are listed as active production items.

Q: What is the operating temperature range for all three parts?

A: All three parts operate within -55°C ~ 100°C, providing identical thermal performance specifications.

Q: Do the turn-on and turn-off times differ between parts?

A: The EL4502M specifies turn-on/turn-off times of 350ns and 300ns respectively. The Isocom parts (6N135G and 6N136G) do not provide turn-on/turn-off time specifications in the available data. Applications with strict timing requirements should verify compatibility with the Isocom parts through detailed datasheets.