BZX584C43-V-G-08 Equivalent & Substitute Parts

Part Overview

The BZX584C43-V-G-08 is a 43 V Zener diode rated for 200 mW power dissipation in a surface mount SOD-523 package, manufactured by Vishay General Semiconductor - Diodes Division. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain the 43 V nominal Zener voltage and SOD-523 package configuration while meeting or exceeding the original electrical specifications.

Substiute Parts

BZX584C43-V-G-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 992BZX584C43-V-G-08 Datasheet

Current PartRFQ

BZX585-B43,115

NXP SemiconductorsIn Stock: 12674BZX585-B43,115 Datasheet

DirectRFQ

CMOZ43V TR PBFREE

Central Semiconductor CorpIn Stock: 9778CMOZ43V TR PBFREE Datasheet

DirectRFQ

DDZ9717T-7

Diodes IncorporatedIn Stock: 23396DDZ9717T-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BZX584C43-V-G-08 is determined by the following critical parameters:

Mandatory Matching Criteria:

• Zener voltage: 43 V nominal
• Package type: SOD-523 surface mount
• Operating temperature range: -65°C to 150°C
• Impedance (Max): 150 Ohms
• RoHS3 compliance

Allowable Variation Criteria:

• Power rating: Equal to or greater than 200 mW
• Voltage tolerance: ±5% or tighter
• Reverse leakage current: Equal to or less than specified values

All identified substitute parts meet the mandatory matching criteria. Variations in power dissipation rating and voltage tolerance are acceptable provided they do not degrade circuit performance or introduce incompatibility with the original design specifications.

Parameter Comparison

Engineering Selection Recommendations

BZX585-B43,115 (NXP Semiconductors)

This substitute provides superior performance characteristics with a tighter voltage tolerance of ±2% compared to the original ±5%, and increased power dissipation capability of 300 mW versus 200 mW. The part is in active production status with extensive inventory availability. This option is suitable for applications requiring enhanced voltage regulation precision and thermal margin.

CMOZ43V TR PBFREE (Central Semiconductor Corp)

This substitute maintains the original ±5% voltage tolerance and provides intermediate power dissipation of 250 mW. The part is in active production status and offers ROHS3 compliance. This option provides a direct functional replacement with modest performance enhancement. Note: Reverse leakage current is specified at 50 µA, which is higher than the original specification.

DDZ9717T-7 (Diodes Incorporated)

This substitute is in active production status with the highest inventory availability among all options. Power dissipation is rated at 150 mW, which is below the original 200 mW specification. This option is suitable only for applications where the reduced power rating does not compromise circuit performance. Voltage tolerance and operating temperature range match the original specifications.

All three substitutes are ROHS3 compliant and maintain the SOD-523 package configuration required for direct board-level replacement.

Frequently Asked Questions (FAQ)

Q: Can the BZX585-B43,115 be used as a direct replacement for the BZX584C43-V-G-08?

A: Yes. The BZX585-B43,115 maintains the 43 V nominal Zener voltage, SOD-523 package, and -65°C to 150°C operating temperature range. The improved specifications (±2% tolerance, 300 mW power rating) provide enhanced performance without introducing incompatibility.

Q: What is the significance of the power rating difference between the main part (200 mW) and the DDZ9717T-7 (150 mW)?

A: Power rating indicates maximum continuous power dissipation capability. The DDZ9717T-7 at 150 mW is rated below the original 200 mW specification. Selection of this part requires verification that circuit operating conditions do not exceed 150 mW dissipation to prevent thermal stress and component failure.

Q: Why does the CMOZ43V TR PBFREE show a higher reverse leakage current (50 µA) compared to other options?

A: Reverse leakage current is a specified electrical characteristic that varies by manufacturer design and process. The CMOZ43V TR PBFREE specification of 50 µA at 30.1 V is higher than the 50 nA typical of other options. This difference may affect circuit performance in applications sensitive to leakage current, such as high-impedance analog circuits.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts are supplied in SOD-523 surface mount package configuration, enabling direct board-level replacement without PCB redesign or rework.

Q: What does the "Tape & Reel (TR)" packaging designation indicate?

A: Tape & Reel packaging indicates the component is supplied on continuous carrier tape wound on a reel, suitable for automated assembly processes. The BZX584C43-V-G-08 is supplied in bulk packaging, while CMOZ43V TR PBFREE and DDZ9717T-7 are supplied in Tape & Reel format. Both packaging formats contain identical components; the difference is in supply and handling method.

Q: Can voltage tolerance differences affect circuit performance?

A: Voltage tolerance specifies the allowable deviation from the nominal 43 V Zener voltage. The BZX585-B43,115 with ±2% tolerance provides tighter voltage regulation compared to ±5% options. In precision voltage reference applications, the tighter tolerance may provide improved circuit stability and reduced output variation.