Equivalent & Substitute Parts for 1N458A_S00Z

Part Overview

The 1N458A_S00Z is a general-purpose rectifier diode manufactured by onsemi, rated for 150 V DC reverse voltage and 500 mA average rectified current in a DO-35 through-hole package. This component is classified as obsolete, indicating discontinued production and limited availability from original sources. Identification of equivalent substitute parts is necessary to maintain design continuity and ensure procurement of functionally compatible alternatives for new production runs or field replacements.

Substiute Parts

1N458A_S00Z

onsemiIn Stock: 9661N458A_S00Z Datasheet

Current PartRFQ

1N458A

Microchip TechnologyIn Stock: 448451N458A Datasheet

Parametric EquivalentRFQ

1N458A

Microchip TechnologyIn Stock: 448451N458A Datasheet

Parametric EquivalentRFQ

1N458A

Microchip TechnologyIn Stock: 448451N458A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1N458A_S00Z are identified based on the following critical parameters that determine functional compatibility:

Voltage Rating Compatibility: The substitute part must maintain the 150 V DC reverse voltage rating to ensure safe operation within the original circuit design envelope.

Package Compatibility: The substitute part must utilize the DO-35 (DO-204AH) through-hole axial package to ensure mechanical fit and board-level compatibility without design modification.

Forward Voltage Characteristics: The substitute part must maintain the 1 V forward voltage specification at 100 mA to preserve circuit performance and power dissipation characteristics.

Technology Classification: The substitute part must be classified as standard technology to maintain consistency with the original design intent.

The identified substitute part, 1N458A from Microchip Technology, satisfies these core compatibility criteria. However, the substitute exhibits a reduced average rectified current rating of 150 mA compared to the original 500 mA specification. This reduction in current capacity represents a functional limitation that must be evaluated against the actual circuit current requirements.

Parameter Comparison

Engineering Selection Recommendations

The 1N458A from Microchip Technology is the identified parametric equivalent for the obsolete 1N458A_S00Z. This substitute maintains voltage rating, forward voltage characteristics, and package compatibility with the original component.

Product Status Consideration: The original part is classified as obsolete with limited inventory availability. The substitute part is in active production status, ensuring long-term procurement viability and supply chain continuity.

Compliance Status: Both the original and substitute parts carry REACH Unaffected designation. The substitute part is classified as RoHS non-compliant, which should be evaluated against the target application's regulatory requirements.

Current Rating Limitation: The substitute part is rated for 150 mA average rectified current, compared to the original 500 mA specification. Circuit designs operating at currents exceeding 150 mA require evaluation to determine if the reduced current rating is acceptable for the intended application.

Temperature Rating Consideration: The substitute part specifies a maximum junction temperature of 150°C, compared to the original 175°C maximum. Applications requiring operation near the original maximum temperature specification require thermal analysis to confirm compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 1N458A from Microchip Technology be used as a direct replacement for the 1N458A_S00Z?

A: The 1N458A from Microchip Technology is mechanically and electrically compatible for voltage rating, forward voltage, and package configuration. However, the reduced current rating of 150 mA versus the original 500 mA must be verified against actual circuit current requirements before implementation.

Q: What is the significance of the different speed classifications between the original and substitute parts?

A: The original part is classified as standard recovery with >500 ns recovery time at currents greater than 200 mA. The substitute is classified as small signal with recovery characteristics applicable to currents of 200 mA or less. This difference reflects different application categories and should be evaluated for switching frequency and transient response requirements.

Q: Are there any compliance differences between the original and substitute parts?

A: Both parts carry REACH Unaffected status. The substitute part is RoHS non-compliant, whereas the original part's RoHS status is not specified in the provided data. Applications subject to RoHS requirements must confirm compliance status with the substitute manufacturer.

Q: What is the impact of the higher reverse leakage current in the substitute part?

A: The substitute part exhibits reverse leakage of 1 µA at 150 V, compared to 25 nA at 125 V for the original part. This represents approximately 40 times higher leakage current. Applications sensitive to leakage current, such as precision analog circuits or high-impedance measurement circuits, require evaluation to determine if this increase is acceptable.

Q: Does the lower maximum junction temperature of the substitute part affect circuit design?

A: The substitute part specifies a maximum junction temperature of 150°C compared to the original 175°C. Thermal analysis of the circuit application is required to confirm that junction temperature remains below 150°C under worst-case operating conditions, including ambient temperature and power dissipation.

Q: Is the DO-35 package identical between the original and substitute parts?

A: Both parts utilize the DO-35 (DO-204AH) axial through-hole package. Mechanical compatibility is confirmed for board-level integration without design modification.