EM518-AP Equivalent & Substitute Parts

Part Overview

The EM518-AP is a general-purpose rectifier diode rated for 2000 V DC reverse voltage with 1 A average rectified current in a DO-41 through-hole axial package. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. The EM518-AP remains available in inventory but is no longer in active production status, necessitating evaluation of current-generation alternatives that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	2000	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.2	V @ 1 A
Current - Reverse Leakage @ Vr	5	µA @ 2000 V
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Operating Temperature - Junction	-65 to 150	°C
Package / Case	DO-204AL, DO-41, Axial	—
Mounting Type	Through Hole	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the EM518-AP is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 2000 V
Current - Average Rectified (Io): 1 A
Recovery Speed: Standard Recovery >500ns, > 200mA (Io)
Operating Temperature Range: -65°C to 150°C
Current - Reverse Leakage @ Vr: 5 µA @ 2000 V

Mechanical Equivalence Criteria:

Package / Case: DO-204AL, DO-41, Axial
Mounting Type: Through Hole

Compliance Criteria:

RoHS Status: ROHS3 Compliant

The EM518GP-AP meets all specified electrical and mechanical parameters while maintaining full RoHS3 compliance. The primary distinction is product status: EM518GP-AP is active production, whereas EM518-AP is obsolete.

Parameter Comparison

Parameter	EM518-AP	EM518GP-AP	Unit
Manufacturer	Micro Commercial Co	Micro Commercial Co	—
Category	Diodes, Rectifiers	Diodes, Rectifiers	—
Product Status	Obsolete	Active	—
Voltage - DC Reverse (Vr) (Max)	2000	2000	V
Current - Average Rectified (Io)	1	1	A
Voltage - Forward (Vf) (Max) @ If	1.2 @ 1 A	1.25 @ 1 A	V
Current - Reverse Leakage @ Vr	5 @ 2000 V	5 @ 2000 V	µA
Speed	Standard Recovery >500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)	—
Operating Temperature - Junction	-65 to 150	-65 to 150	°C
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	—
Mounting Type	Through Hole	Through Hole	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	—
ECCN	EAR99	EAR99	—
HTSUS	8541.10.0080	8541.10.0080	—

Engineering Selection Recommendations

EM518GP-AP is the direct active-production equivalent for EM518-AP applications. Selection of EM518GP-AP is based on the following factors:

Product Status: EM518GP-AP holds active production status, ensuring long-term availability and supply chain continuity. EM518-AP is obsolete and subject to inventory depletion.

Electrical Compatibility: Both parts maintain identical reverse voltage rating (2000 V), average rectified current (1 A), reverse leakage current (5 µA @ 2000 V), and recovery speed characteristics. Forward voltage specification for EM518GP-AP (1.25 V @ 1 A) is within acceptable tolerance relative to EM518-AP (1.2 V @ 1 A) for general-purpose rectification applications.

Mechanical Compatibility: Both parts use identical DO-41 axial through-hole packaging, enabling direct board-level substitution without layout modification.

Compliance: Both parts maintain ROHS3 compliance, MSL Level 1 (unlimited moisture sensitivity), and identical export classification (EAR99) and tariff codes (HTSUS 8541.10.0080).

Packaging Consideration: EM518GP-AP is supplied in Tape & Box (TB) format, whereas EM518-AP packaging format is not specified. Verify packaging requirements for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can EM518GP-AP directly replace EM518-AP in existing designs?

A: Yes. EM518GP-AP meets all electrical and mechanical specifications of EM518-AP. Both parts share identical reverse voltage (2000 V), average rectified current (1 A), reverse leakage (5 µA @ 2000 V), recovery speed, operating temperature range (-65°C to 150°C), and DO-41 through-hole package configuration. Forward voltage differs by 0.05 V (1.25 V vs. 1.2 V), which is within standard tolerance for general-purpose rectifier applications.

Q: Why is EM518-AP classified as obsolete?

A: EM518-AP is no longer in active production. EM518GP-AP is the current-generation equivalent maintained by Micro Commercial Co for ongoing supply and support.

Q: Are there any compliance differences between EM518-AP and EM518GP-AP?

A: No. Both parts are ROHS3 compliant, carry MSL Level 1 (unlimited), and share identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Q: What is the packaging difference between EM518-AP and EM518GP-AP?

A: EM518GP-AP is supplied in Tape & Box (TB) format. EM518-AP packaging format is not specified in available documentation. Confirm packaging requirements for your assembly process before procurement.

Q: Are both parts suitable for high-temperature applications?

A: Yes. Both EM518-AP and EM518GP-AP support operating junction temperatures from -65°C to 150°C, enabling use in industrial and automotive environments within this thermal range.

Q: What is the reverse leakage current specification?

A: Both parts specify 5 µA maximum reverse leakage current at 2000 V reverse bias, ensuring consistent leakage performance across equivalent designs.

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