HER203-AP Equivalent & Substitute Parts

Part Overview

The HER203-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 200 V DC reverse voltage and 2 A average rectified current in a DO-15 through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across a junction temperature range of -55°C to 150°C and complies with RoHS3 standards.

Substiute Parts

HER203-AP

Micro Commercial CoIn Stock: 769HER203-AP Datasheet

Current PartRFQ

PR1503-T

Diodes IncorporatedIn Stock: 787PR1503-T Datasheet

SimilarRFQ

HER203G A0G

Taiwan Semiconductor CorporationIn Stock: 8401HER203G A0G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the HER203-AP is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): 200 V minimum
• Current - Average Rectified (Io): 2 A minimum
• Mounting Type: Through Hole
• Package / Case: DO-15 or DO-204AC compatible
• Technology: Standard rectifier diode

Substitution Categories:

Parametric Equivalent: HER203G A0G matches all primary electrical specifications (200 V, 2 A) with identical forward voltage and reverse recovery time. This part is manufactured by Taiwan Semiconductor Corporation and carries active product status with higher inventory availability.

Functional Substitute: PR1503-T is rated for 200 V reverse voltage but with reduced average rectified current of 1.5 A. This part is suitable for applications where the 2 A current rating is not fully utilized. The forward voltage is slightly elevated at 1.2 V @ 1.5 A, and reverse recovery time is extended to 150 ns. This part is manufactured by Diodes Incorporated with active product status.

Parameter Comparison

Engineering Selection Recommendations

HER203G A0G (Parametric Equivalent - Recommended Primary Choice)

The HER203G A0G is the direct parametric equivalent for the obsolete HER203-AP. This part maintains identical electrical specifications across all critical parameters: 200 V reverse voltage, 2 A average rectified current, 1 V forward voltage at 2 A, and 50 ns reverse recovery time. The part carries active product status from Taiwan Semiconductor Corporation, ensuring long-term availability and supply chain continuity. RoHS3 compliance and unlimited moisture sensitivity level (MSL 1) match the original specification. Higher inventory availability (8349 pieces) supports immediate procurement requirements.

PR1503-T (Functional Substitute - Application-Dependent)

The PR1503-T from Diodes Incorporated is suitable for applications where the full 2 A current rating of the HER203-AP is not required. This part maintains the 200 V reverse voltage rating and RoHS3 compliance. The reduced current rating of 1.5 A, elevated forward voltage of 1.2 V @ 1.5 A, and extended reverse recovery time of 150 ns represent trade-offs that must be evaluated against specific circuit requirements. Active product status and extended operating temperature range (-65°C to 150°C) provide additional design flexibility. This substitute is appropriate only when circuit analysis confirms that 1.5 A average rectified current is sufficient.

Frequently Asked Questions (FAQ)

Q: Can HER203G A0G be used as a direct replacement for HER203-AP?

A: Yes. The HER203G A0G is a parametric equivalent with identical voltage, current, forward voltage, and reverse recovery time specifications. Both parts are rated for 200 V, 2 A, with 1 V forward voltage at 2 A and 50 ns reverse recovery time. The part is pin-compatible in DO-15 through-hole applications.

Q: What are the limitations of using PR1503-T as a substitute?

A: The PR1503-T has a reduced average rectified current rating of 1.5 A compared to the 2 A rating of HER203-AP. Forward voltage is higher at 1.2 V @ 1.5 A versus 1 V @ 2 A. Reverse recovery time is extended to 150 ns versus 50 ns. These differences require circuit analysis to confirm compatibility with the intended application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both HER203G A0G and PR1503-T are RoHS3 compliant, matching the compliance status of the original HER203-AP.

Q: What is the difference between DO-15 and DO-204AC packaging?

A: DO-15 and DO-204AC are equivalent designations for the same axial through-hole package format. Both terms refer to the same physical package used in these rectifier diodes.

Q: Does the operating temperature range affect substitution?

A: The HER203-AP and HER203G A0G both operate from -55°C to 150°C. The PR1503-T extends the lower temperature limit to -65°C. If the application requires operation below -55°C, PR1503-T provides additional margin. For standard applications within -55°C to 150°C, all three parts are equivalent in this parameter.

Q: What packaging formats are available for these parts?

A: HER203G A0G is supplied in Cut Tape (CT) format. PR1503-T is supplied in Tape & Reel (TR) format. Both formats are suitable for through-hole assembly; packaging selection depends on production volume and assembly equipment compatibility.

Q: Is the HER203-AP still available for procurement?

A: The HER203-AP is classified as obsolete. While 717 pieces are reported in stock, long-term availability cannot be assured. HER203G A0G (8349 pieces in stock) with active product status is the recommended alternative for new designs and ongoing procurement.