BZT52B13-TP Equivalent & Substitute Parts

Part Overview

The BZT52B13-TP is an active-status Zener diode manufactured by Micro Commercial Co, rated at 13 V nominal with 410 mW maximum power dissipation in a surface-mount SOD-123 package. This component is used for voltage regulation and transient protection in electronic circuits. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within specified parameter tolerances and package constraints.

Substiute Parts

BZT52B13-TP

Micro Commercial CoIn Stock: 1154BZT52B13-TP Datasheet

Current PartRFQ

SZMMSZ5243BT1G

onsemiIn Stock: 20495SZMMSZ5243BT1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of Zener diodes is determined by matching the following critical parameters:

1. Nominal Zener Voltage (Vz): Must be identical at 13 V to maintain circuit regulation voltage
2. Package / Case: Must be SOD-123 to ensure mechanical and thermal compatibility with PCB layout
3. Mounting Type: Must be Surface Mount for assembly process compatibility
4. Power Rating: Substitute must meet or exceed the 410 mW requirement for thermal performance
5. Operating Temperature Range: Substitute must cover the application temperature envelope
6. RoHS Compliance: Must maintain ROHS3 Compliant status for regulatory requirements

The SZMMSZ5243BT1G from onsemi meets these substitution criteria with identical nominal voltage, package type, and mounting configuration.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: BZT52B13-TP

The BZT52B13-TP is the specified component with active product status, ROHS3 compliance, and REACH unaffected classification. It provides ±2% voltage tolerance and operates across -55°C to 175°C.

Substitute Part: SZMMSZ5243BT1G

The SZMMSZ5243BT1G from onsemi is a qualified substitute with the following characteristics:

• Identical 13 V nominal Zener voltage
• SOD-123 package compatibility
• Higher power rating (500 mW vs. 410 mW) provides thermal margin
• Lower impedance (13 Ohms vs. 25 Ohms) improves regulation performance
• Active product status with ROHS3 compliance
• AEC-Q101 automotive qualification
• Operating temperature range of -55°C to 150°C (25°C reduction from primary part)

The substitute is suitable for applications where the upper temperature limit of 150°C is acceptable. The ±5% voltage tolerance is wider than the primary part's ±2%, which may require circuit-level evaluation depending on regulation requirements.

Frequently Asked Questions (FAQ)

Q: Can SZMMSZ5243BT1G replace BZT52B13-TP in all applications?

A: The SZMMSZ5243BT1G is mechanically and electrically compatible for applications operating within -55°C to 150°C. Applications requiring operation above 150°C require the primary BZT52B13-TP. The wider ±5% tolerance of the substitute must be evaluated against circuit voltage regulation specifications.

Q: What is the significance of the different impedance values (25 Ohms vs. 13 Ohms)?

A: Lower impedance in the substitute part (13 Ohms) results in better voltage regulation under load changes and reduced output impedance. This is a performance advantage in most applications.

Q: Are both parts RoHS compliant?

A: Yes, both BZT52B13-TP and SZMMSZ5243BT1G are ROHS3 compliant and REACH unaffected.

Q: Does the higher power rating of the substitute affect circuit operation?

A: No. The 500 mW rating of SZMMSZ5243BT1G exceeds the 410 mW requirement of BZT52B13-TP, providing additional thermal margin without affecting electrical performance.

Q: Are there package differences between these parts?

A: Both parts use the SOD-123 surface-mount package with identical pinout and footprint compatibility.

Q: What is the impact of reverse leakage current differences?

A: The substitute exhibits higher reverse leakage (500 nA @ 9.9 V vs. 100 nA @ 10 V). This difference is application-dependent and must be evaluated for circuits sensitive to leakage current, such as precision analog or high-impedance applications.