ER300-AP Equivalent & Substitute Parts

Part Overview

The ER300-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This part is classified as obsolete, making identification of active equivalent and substitute components necessary for ongoing design support and procurement continuity. The ER300-AP operates across a junction temperature range of -55°C to 150°C and meets ROHS3 compliance requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A	mV
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	DO-201AD, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the ER300-AP is determined by strict equivalence across the following electrical and mechanical parameters:

Voltage Rating: DC reverse voltage must equal 50 V
Current Rating: Average rectified current must equal 3 A
Forward Voltage Drop: Maximum forward voltage at rated current must equal 950 mV @ 3 A
Recovery Characteristics: Reverse recovery time must equal 35 ns; speed classification must be Fast Recovery ≤ 500ns, > 200mA
Leakage Current: Reverse leakage current must equal 5 µA @ 50 V
Package: DO-201AD axial through-hole package required
Temperature Range: Operating junction temperature range must span -55°C to 150°C
Compliance: ROHS3 compliance required

All substitute parts listed below meet these criteria without exception. Parametric equivalents are grouped by manufacturer and product status (active vs. obsolete).

Parameter Comparison

Parameter	ER300-AP (Micro Commercial Co)	SF31G A0G (Taiwan Semiconductor)	SF31GHA0G (Taiwan Semiconductor)
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V
Current - Average Rectified (Io)	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 3 A	950 mV @ 3 A	950 mV @ 3 A
Reverse Recovery Time (trr)	35 ns	35 ns	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Package / Case	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial
Mounting Type	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	—	—	AEC-Q101 Qualified

Engineering Selection Recommendations

Primary Substitute: SF31G A0G (Taiwan Semiconductor Corporation)

The SF31G A0G is an active production equivalent that matches all electrical and mechanical parameters of the ER300-AP. This part is currently in active product status with 928 units in stock, providing immediate procurement availability. ROHS3 compliance and identical performance specifications make this the direct functional replacement for general-purpose applications.

Automotive-Grade Alternative: SF31GHA0G (Taiwan Semiconductor Corporation)

The SF31GHA0G is recommended for applications requiring automotive-grade qualification. This variant maintains identical electrical performance to the ER300-AP while adding AEC-Q101 qualification. With 1136 units in stock and active product status, this part is suitable for automotive and high-reliability applications where grade certification is specified. The SF31GHA0G is a superset of the SF31G A0G capabilities.

Both substitute parts are manufactured by Taiwan Semiconductor Corporation and are actively produced, eliminating obsolescence risk associated with the ER300-AP.

Frequently Asked Questions (FAQ)

Q: Can SF31G A0G be used as a direct replacement for ER300-AP?

A: Yes. The SF31G A0G meets all electrical and mechanical parameters of the ER300-AP, including voltage rating (50 V), current rating (3 A), forward voltage drop (950 mV @ 3 A), reverse recovery time (35 ns), leakage current (5 µA @ 50 V), and package type (DO-201AD axial through-hole). Both parts operate across -55°C to 150°C and are ROHS3 compliant.

Q: What is the difference between SF31G A0G and SF31GHA0G?

A: Both parts are parametrically equivalent to the ER300-AP. The SF31GHA0G includes AEC-Q101 automotive qualification, making it suitable for automotive applications where grade certification is required. Electrical performance is identical between the two variants.

Q: Are these substitute parts available in the same package?

A: Yes. Both SF31G A0G and SF31GHA0G use the DO-201AD axial through-hole package, identical to the ER300-AP. No PCB layout or mechanical modifications are required for substitution.

Q: What is the product status of the substitute parts?

A: Both SF31G A0G and SF31GHA0G are in active production status, ensuring long-term availability and supply continuity. The ER300-AP is classified as obsolete.

Q: Do the substitute parts meet RoHS compliance?

A: Yes. Both SF31G A0G and SF31GHA0G are ROHS3 compliant, matching the compliance status of the ER300-AP.

Q: Can I use SF31GHA0G in non-automotive applications?

A: Yes. The SF31GHA0G is a superset of the SF31G A0G with additional automotive qualification. It can be used in any application where the SF31G A0G is suitable, including general-purpose rectification circuits.

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