BZX584B12-TP Equivalent & Substitute Parts

Part Overview

The BZX584B12-TP is an active-status Zener diode manufactured by Micro Commercial Co, designed for voltage regulation and protection applications in surface-mount configurations. This 12 V, 150 mW device operates across the temperature range of -55°C to 150°C and is packaged in the SOD-523 form factor. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and compliance certifications align with the original specification, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	12	V
Tolerance	±2%	—
Power - Max	150	mW
Impedance (Max)	25	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 8 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	SC-79, SOD-523	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the BZX584B12-TP is determined by strict equivalence across the following critical parameters:

Zener Voltage (Vz): 12 V nominal
Tolerance: ±2%
Power Dissipation: 150 mW maximum
Impedance (Zzt): 25 Ohms maximum
Reverse Leakage Current: 100 nA @ 8 V
Forward Voltage: 900 mV @ 10 mA maximum
Operating Temperature Range: -55°C to 150°C
Package: SOD-523 surface-mount form factor
Compliance: ROHS3 Compliant, MSL 1

All identified substitute parts maintain identical electrical specifications and mechanical compatibility. Variations in packaging format (Tape & Reel versus Cut Tape) and manufacturer do not affect functional interchangeability when these core parameters are matched.

Parameter Comparison

Parameter	BZX584B12-TP (Micro Commercial Co)	BZX584B12HE3-TP (Micro Commercial Co)	BZX584B12 RSG (Taiwan Semiconductor)
Voltage - Zener (Nom)	12 V	12 V	12 V
Tolerance	±2%	±2%	±2%
Power - Max	150 mW	150 mW	150 mW
Impedance (Max)	25 Ohms	25 Ohms	25 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 8 V	100 nA @ 8 V	100 nA @ 8 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	Not specified
Operating Temperature	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523
Supplier Device Package	SOD-523	SOD-523	SOD-523F
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
Qualification	Standard	AEC-Q101 Automotive	Not specified

Engineering Selection Recommendations

All three parts maintain active product status and full compliance with ROHS3 and environmental regulations. Selection between BZX584B12-TP, BZX584B12HE3-TP, and BZX584B12 RSG is determined by application requirements and supply chain considerations:

BZX584B12-TP serves as the baseline reference part with standard industrial qualification and Tape & Reel packaging.

BZX584B12HE3-TP is qualified to AEC-Q101 automotive standards, making it suitable for automotive and high-reliability applications requiring automotive-grade component certification. This part is also supplied in Tape & Reel format.

BZX584B12 RSG is manufactured by Taiwan Semiconductor Corporation and supplied in Cut Tape and Digi-Reel® packaging formats, offering alternative sourcing and packaging flexibility. This part does not specify automotive qualification.

All three parts are electrically and mechanically interchangeable for applications where the specified electrical parameters and SOD-523 package are required. Selection should account for supply availability, packaging requirements, and application-specific qualification needs.

Frequently Asked Questions (FAQ)

Q: Can BZX584B12HE3-TP replace BZX584B12-TP in any application?

A: Yes. BZX584B12HE3-TP maintains identical electrical specifications and mechanical compatibility. The AEC-Q101 automotive qualification of BZX584B12HE3-TP is an additional certification that does not restrict its use in standard industrial applications.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging supplies components on continuous carrier tape wound on reels, suitable for high-volume automated assembly. Cut Tape supplies the same components on shorter tape segments. Both formats contain identical components; the difference is in supply format and handling for manufacturing processes.

Q: Are there differences in the SOD-523 and SOD-523F package designations?

A: Both designations refer to the same physical package form factor (SC-79). The "F" suffix in SOD-523F is a supplier-specific designation and does not indicate a functional or dimensional difference. All three parts are mechanically compatible in the same PCB footprint.

Q: Can BZX584B12 RSG be used in automotive applications?

A: BZX584B12 RSG meets all electrical and environmental specifications required for automotive use. However, it does not carry explicit AEC-Q101 automotive qualification. For applications requiring documented automotive qualification, BZX584B12HE3-TP is the appropriate selection.

Q: What inventory considerations apply to these substitutes?

A: BZX584B12-TP has 705 units in stock, BZX584B12HE3-TP has 16,682 units in stock, and BZX584B12 RSG has 104,832 units in stock. Availability and lead time may influence selection when immediate supply is required.

Q: Are all three parts RoHS compliant?

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

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message