AZ23C12-TP Equivalent & Substitute Parts

Part Overview

The AZ23C12-TP is an active zener diode array manufactured by Micro Commercial Co, configured as a 1 Pair Common Anode design with a nominal zener voltage of 12 V and maximum power dissipation of 300 mW. The device is packaged in SOT-23 surface mount configuration and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). This component is used in voltage regulation and protection circuits requiring precise 12 V reference or clamping functionality. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and manufacturing certifications to support design flexibility and supply chain continuity.

Substiute Parts

AZ23C12-TP

Micro Commercial CoIn Stock: 3696AZ23C12-TP Datasheet

Current PartRFQ

AZ23C12-7-F

Diodes IncorporatedIn Stock: 9351AZ23C12-7-F Datasheet

DirectRFQ

BZB784-C12,115

Nexperia USA Inc.In Stock: 3822BZB784-C12,115 Datasheet

SimilarRFQ

BZB84-C12,215

Nexperia USA Inc.In Stock: 4357BZB84-C12,215 Datasheet

SimilarRFQ

MMBZ12VALT1G

onsemiIn Stock: 65430MMBZ12VALT1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AZ23C12-TP is determined by the following critical parameters:

Primary Matching Criteria:

• Voltage - Zener (Nom): 12 V
• Configuration: 1 Pair Common Anode
• Tolerance: ±5%
• Mounting Type: Surface Mount
• Package / Case: TO-236-3, SC-59, SOT-23-3 (or compatible variants)
• RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

• Power - Max: 300 mW (minimum acceptable for direct substitution)
• Impedance (Max): 20 Ohms (or lower)
• Product Status: Active

Substitute parts are classified into two categories:

Direct Equivalents: Parts with identical electrical specifications, configuration, and package designation. These parts are fully interchangeable without circuit modification.

Similar Substitutes: Parts with matching zener voltage, configuration, and mounting type but with variations in power rating, impedance, package variant, or automotive qualification. These parts require design review to confirm compatibility with application power budget and thermal constraints.

Parameter Comparison

Engineering Selection Recommendations

AZ23C12-7-F (Diodes Incorporated)

This part is a direct equivalent to the AZ23C12-TP. It maintains identical electrical specifications (12 V nominal zener voltage, ±5% tolerance, 300 mW maximum power, 20 Ohms maximum impedance) and configuration (1 Pair Common Anode). The package designation is SOT-23-3, which is compatible with the main part's TO-236-3, SC-59, SOT-23-3 footprint. Operating temperature range is specified (-65°C ~ 150°C), providing defined thermal performance. ROHS3 compliance and MSL 1 rating match the main part. This substitute is suitable for direct replacement in applications where supply of the AZ23C12-TP is constrained.

BZB84-C12,215 (Nexperia USA Inc.)

This part matches the AZ23C12-TP in zener voltage (12 V), tolerance (±5%), power rating (300 mW), configuration (1 Pair Common Anode), and package footprint (TO-236-3, SC-59, SOT-23-3). The impedance specification is 25 Ohms (5 Ohms higher than the main part). This part carries automotive grade designation and AEC-Q100 qualification, indicating suitability for automotive applications. ROHS3 compliance and MSL 1 rating are maintained. The supplier device package is TO-236AB. This substitute is appropriate for applications requiring automotive-qualified components or where automotive supply chain traceability is required.

BZB784-C12,115 (Nexperia USA Inc.)

This part provides 12 V nominal zener voltage and ±5% tolerance matching the main part, but with reduced maximum power rating (180 mW versus 300 mW) and different package type (SOT-323 versus SOT-23-3). The impedance specification is 25 Ohms. This part carries automotive grade designation and AEC-Q100 qualification. The reduced power rating and different package footprint (SC-70, SOT-323) require design verification to confirm thermal and layout compatibility. This substitute is suitable only for applications with lower power dissipation requirements and where SOT-323 package footprint is available.

MMBZ12VALT1G (onsemi)

This part is classified as a Transient Voltage Suppressor (TVS) diode rather than a standard zener diode array. It features 2 unidirectional channels, reverse standoff voltage of 8.5 V, and breakdown voltage minimum of 11.4 V. Peak pulse power is 40 W with peak pulse current of 2.35 A. The package is SOT-23-3 (TO-236), which is compatible with the main part's footprint. Operating temperature range is -55°C ~ 150°C. ROHS3 compliance and MSL 1 rating are maintained. This part is functionally distinct from the AZ23C12-TP due to its TVS classification and different electrical characteristics. Substitution requires circuit-level analysis to confirm that TVS clamping behavior and unidirectional channel configuration are compatible with the intended application.

Frequently Asked Questions (FAQ)

Q: Can AZ23C12-7-F be used as a direct replacement for AZ23C12-TP?

A: Yes. The AZ23C12-7-F maintains identical zener voltage (12 V), tolerance (±5%), power rating (300 mW), impedance (20 Ohms maximum), and configuration (1 Pair Common Anode). The package footprint is compatible (SOT-23-3 is equivalent to TO-236-3, SC-59, SOT-23-3). No circuit modification is required.

Q: What is the difference between BZB84-C12,215 and BZB784-C12,115?

A: Both parts provide 12 V zener voltage and ±5% tolerance. BZB84-C12,215 has 300 mW maximum power and SOT-23-3 package (TO-236AB supplier package). BZB784-C12,115 has 180 mW maximum power and SOT-323 package. The impedance of BZB784-C12,115 is 25 Ohms versus 25 Ohms for BZB84-C12,215. BZB84-C12,215 is suitable for applications matching the AZ23C12-TP power budget, while BZB784-C12,115 requires lower power dissipation.

Q: Are the Nexperia parts (BZB84-C12,215 and BZB784-C12,115) suitable for automotive applications?

A: Yes. Both Nexperia parts carry automotive grade designation and AEC-Q100 qualification. These certifications indicate compliance with automotive reliability and quality standards. Selection between these parts depends on package type and power rating requirements.

Q: Why is MMBZ12VALT1G listed as a substitute if it is a TVS diode?

A: MMBZ12VALT1G is listed because it shares the same package footprint (SOT-23-3) and operates at similar voltage levels. However, it is functionally distinct as a TVS diode with unidirectional channels and different electrical characteristics (reverse standoff 8.5 V, breakdown minimum 11.4 V, peak pulse power 40 W). Substitution of MMBZ12VALT1G for the AZ23C12-TP requires circuit-level analysis to confirm that TVS clamping behavior is compatible with the application. This part is not a direct equivalent.

Q: What does the impedance specification mean for zener diode selection?

A: Impedance (Zzt) represents the dynamic impedance of the zener diode at a specified test current. Lower impedance indicates better voltage regulation and lower output impedance. The AZ23C12-TP and AZ23C12-7-F both specify 20 Ohms maximum impedance, while the Nexperia parts specify 25 Ohms. For applications requiring tight voltage regulation, the lower impedance of the Micro Commercial Co and Diodes Incorporated parts is preferred.

Q: Can I use BZB784-C12,115 in place of AZ23C12-TP if my application has lower power requirements?

A: BZB784-C12,115 can be used only if the application power dissipation is confirmed to be below 180 mW. The different package type (SOT-323 versus SOT-23-3) requires verification that the PCB footprint and thermal management are compatible. Design review is necessary before substitution.

Q: What is the significance of the operating temperature range specification?

A: Operating temperature range defines the thermal limits within which the component maintains specified electrical performance. AZ23C12-7-F specifies -65°C ~ 150°C, and MMBZ12VALT1G specifies -55°C ~ 150°C. The main part (AZ23C12-TP) does not provide an operating temperature specification in the available data. For applications with defined thermal requirements, parts with specified operating temperature ranges provide documented performance boundaries.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. All parts listed (AZ23C12-7-F, BZB784-C12,115, BZB84-C12,215, and MMBZ12VALT1G) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. This ensures compatibility with lead-free manufacturing processes and storage requirements.