MMSZ5243B Equivalent & Substitute Parts Reference

Part Overview

The MMSZ5243B is a surface-mount Zener diode in the SOD-123F package, designed for voltage regulation and surge protection applications. As an active product within the Diodes, Zener category, it features a nominal Zener voltage of 13 V, a maximum power dissipation of 500 mW, and a tolerance of ±5%. Sourcing alternative models is required for design flexibility, supply assurance, and inventory management when equivalent electrical and mechanical characteristics are mandatory.

Substiute Parts

MMSZ5243B

Taiwan Semiconductor CorporationIn Stock: 47327MMSZ5243B Datasheet

Current PartRFQ

MMSZ5243B RHG

Taiwan Semiconductor CorporationIn Stock: 7090MMSZ5243B RHG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are identified strictly by matching all principal electrical and mechanical parameters: Zener voltage (13 V nominal), voltage tolerance (±5%), maximum power dissipation (500 mW), maximum impedance (13 Ohms), maximum reverse leakage current (500 nA @ 9.9 V), operating temperature range (-65°C ~ 150°C), surface mount configuration, and SOD-123F package. These parameters ensure full interchangeability within the product category.

Parameter Comparison

Engineering Selection Recommendations

Both MMSZ5243B and the substitute MMSZ5243B RHG are active status, RoHS3 compliant, REACH unaffected, with matching electrical and mechanical specifications. Selection may be based on inventory availability and supply considerations, without concern for product status or compliance discrepancies.

Frequently Asked Questions (FAQ)

Q: What are the main criteria for substituting MMSZ5243B in circuit designs?
A: Substitute parts must match in Zener voltage (13 V), tolerance (±5%), maximum power dissipation (500 mW), maximum impedance (13 Ohms), reverse leakage current (500 nA @ 9.9 V), package (SOD-123F), mounting type, and compliance status.

Q: Can MMSZ5243B RHG be used interchangeably with MMSZ5243B in the same PCB footprint?
A: Yes. Both MMSZ5243B and MMSZ5243B RHG share the SOD-123F surface mount package and have identical key parameters.

Q: Are there any differences in operating temperature or environmental compliance between these Zener diode substitutes?
A: No. Both parts operate from -65°C to 150°C and are RoHS3 compliant and REACH unaffected.

Q: How do I ensure package compatibility when selecting a substitute Zener diode?
A: Only select substitutes with the same package/case code (SOD-123F) and surface mount configuration as the original MMSZ5243B.

Q: Is there a risk to electrical performance or reliability when using the listed substitutes?
A: No, when all principal electrical and mechanical parameters are matched as detailed here, direct substitution is supported for qualified parts in this product category.