BZX584B12 Equivalent & Substitute Parts

Part Overview

The BZX584B12 is an active-status Zener diode manufactured by Taiwan Semiconductor Corporation, designed for surface mount applications in the SOD-523F package. This 12 V, 150 mW Zener diode with ±2% tolerance serves voltage regulation and protection functions in electronic circuits. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within the specified parameter ranges.

Substiute Parts

BZX584B12

Taiwan Semiconductor CorporationIn Stock: 999BZX584B12 Datasheet

Current PartRFQ

BZX584B12 RSG

Taiwan Semiconductor CorporationIn Stock: 104842BZX584B12 RSG Datasheet

Parametric EquivalentRFQ

BZX584B12HE3-TP

Micro Commercial CoIn Stock: 16745BZX584B12HE3-TP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BZX584B12 are qualified based on matching the following critical electrical and mechanical parameters:

• Voltage - Zener (Nominal): 12 V
• Tolerance: ±2%
• Power - Maximum: 150 mW
• Impedance (Maximum): 25 Ohms
• Current - Reverse Leakage @ Vr: 100 nA @ 8 V
• Operating Temperature Range: -55°C to 150°C (TJ)
• Mounting Type: Surface Mount
• Package / Case: SC-79, SOD-523 or SOD-523F
• RoHS Status: ROHS3 Compliant

All identified substitutes maintain these core parameters, ensuring functional and mechanical interchangeability. Packaging format variations (Tape & Reel versus Cut Tape & Digi-Reel) do not affect electrical performance and represent alternative supply chain options.

Parameter Comparison

Engineering Selection Recommendations

All three parts—BZX584B12, BZX584B12 RSG, and BZX584B12HE3-TP—are active-status components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.

BZX584B12 RSG is supplied by Taiwan Semiconductor Corporation in Cut Tape & Digi-Reel packaging format, offering the same electrical specifications as the primary part with alternative packaging logistics.

BZX584B12HE3-TP is supplied by Micro Commercial Co in Tape & Reel format and carries AEC-Q101 automotive qualification, indicating suitability for automotive-grade applications where enhanced reliability standards are required.

Selection between these substitutes depends on packaging requirements, supply chain preferences, and application-specific qualification needs rather than electrical performance differences.

Frequently Asked Questions (FAQ)

Q: Can BZX584B12 RSG be used as a direct replacement for BZX584B12?

A: Yes. Both parts share identical electrical parameters: 12 V nominal Zener voltage, ±2% tolerance, 150 mW maximum power, 25 Ohms maximum impedance, and 100 nA reverse leakage current at 8 V. The difference is packaging format: BZX584B12 is supplied in Tape & Reel, while BZX584B12 RSG is supplied in Cut Tape & Digi-Reel format.

Q: What is the difference between BZX584B12HE3-TP and the other substitutes?

A: BZX584B12HE3-TP is manufactured by Micro Commercial Co and carries AEC-Q101 automotive qualification. Electrically, it matches the other parts in all critical parameters. The automotive qualification indicates compliance with automotive reliability and testing standards.

Q: Are there package compatibility concerns between SOD-523F and SOD-523?

A: Both designations refer to the same physical package form factor (SC-79). The parts are mechanically and electrically compatible for PCB assembly and circuit operation.

Q: Do all substitutes meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: Which substitute should be selected for automotive applications?

A: BZX584B12HE3-TP carries AEC-Q101 automotive qualification and is the appropriate selection for automotive-grade circuit designs.