MMSZ5251B Equivalent & Substitute Parts Reference

Part Overview

The MMSZ5251B is a Zener Diode manufactured by Taiwan Semiconductor Corporation, classified under the "Diodes, Zener" category. It features a nominal Zener voltage of 22 V, a power dissipation rating of 500 mW, and a tolerance of ±5%. The device is packaged in an SOD-123F surface-mount format. Its part status is "Active," allowing for ongoing sourcing in volume. However, identifying substitute models is critical to ensure flexibility in procurement and design-in alternatives, especially for inventory management, supply chain continuity, or multi-sourcing strategies within the same product series.

Substiute Parts

MMSZ5251B

Taiwan Semiconductor CorporationIn Stock: 109008MMSZ5251B Datasheet

Current PartRFQ

MMSZ5251B RHG

Taiwan Semiconductor CorporationIn Stock: 6897MMSZ5251B RHG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for MMSZ5251B are grouped strictly by matching the following defined parameters: Zener voltage (22 V), tolerance (±5%), maximum power dissipation (500 mW), maximum impedance (29 Ohms), reverse leakage current at test voltage (100 nA @ 17 V), package type (SOD-123F), mounting type (surface mount), RoHS and REACH compliance, and operational temperature range. Only parts that align exactly with these characteristics and compliance designations are included in the substitution list.

Parameter Comparison

Engineering Selection Recommendations

Both MMSZ5251B and MMSZ5251B RHG are active products in the "Diodes, Zener" category with identical electrical and mechanical characteristics, compliance certifications (ROHS3, REACH), and ECCN and HTSUS designations. Selection can be confidently made based solely on inventory status, packaging requirements, and required documentation, as all key parameters are matched.

Frequently Asked Questions (FAQ)

Q1: What are the essential criteria for substituting MMSZ5251B Zener Diodes?
Only parts matching the specified Zener voltage, tolerance, power rating, impedance, reverse leakage current, package style, operating temperature range, and compliance must be considered for substitution.

Q2: Is MMSZ5251B RHG compatible as a direct replacement for MMSZ5251B in surface-mount designs?
Yes, MMSZ5251B RHG shares identical electrical and mechanical parameters with MMSZ5251B, including surface-mount SOD-123F package and series designation.

Q3: Are there any compliance or certification differences between MMSZ5251B and the substitute part?
No differences exist; both parts are ROHS3 compliant and REACH unaffected and carry the same ECCN and HTSUS codes.

Q4: Does packaging type affect the selection process between MMSZ5251B and MMSZ5251B RHG?
No, both are supplied in Tape & Reel (TR) packaging and are suitable for automated assembly processes consistent with standard surface-mount device handling.

Q5: How should inventory availability be considered when choosing between MMSZ5251B and its substitute?
Selection should be based on current stock levels, lead times, and supply chain requirements, provided all specified technical and compliance parameters are fulfilled.