MMBZ5248BW-TP Zener Diode 18V 200mW Equivalent & Substitute Parts

Part Overview

The MMBZ5248BW-TP is an 18V, 200mW Zener diode manufactured by Micro Commercial Co in SOT-323 surface mount packaging. This component is classified as an active product and is ROHS3 compliant. Substitute parts are identified based on matching electrical specifications including nominal Zener voltage, power dissipation rating, impedance characteristics, and reverse leakage current. Alternative part numbers may be required due to inventory availability, manufacturer preference, or supply chain optimization while maintaining equivalent circuit performance.

Substiute Parts

MMBZ5248BW-TP

Micro Commercial CoIn Stock: 965MMBZ5248BW-TP Datasheet

Current PartRFQ

MMBZ5248BW-7-F

Diodes IncorporatedIn Stock: 36203MMBZ5248BW-7-F Datasheet

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MMBZ5248BT-7-F

Diodes IncorporatedIn Stock: 4464MMBZ5248BT-7-F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MMBZ5248BW-TP are classified based on electrical parameter equivalence. The primary substitution criteria are:

Direct Electrical Equivalents: Parts sharing identical nominal Zener voltage (18V), tolerance (±5%), maximum power dissipation (200mW), impedance (21 Ohms maximum), reverse leakage current (100nA @ 14V), and forward voltage characteristics (900mV @ 10mA) are classified as direct substitutes. These parts maintain full functional interchangeability in circuit applications.

Similar Parts with Parameter Variance: Parts matching the core Zener voltage and tolerance specifications but differing in power rating or package configuration are classified as similar alternatives. These parts require circuit-level evaluation to confirm suitability based on thermal and spatial constraints.

The MMBZ5248BW-TP operates across a temperature range of -55°C to 150°C. Substitute parts may extend this range while maintaining all other electrical specifications. Package compatibility (SOT-323 versus SOT-523) and power dissipation ratings are critical selection factors for mechanical and thermal integration.

Parameter Comparison

Engineering Selection Recommendations

MMBZ5248BW-7-F (Diodes Incorporated): This part is a direct electrical equivalent to the MMBZ5248BW-TP with identical power rating (200mW), impedance (21 Ohms), and package configuration (SOT-323). The operating temperature range extends to -65°C, providing enhanced low-temperature performance. Both parts are ROHS3 compliant and REACH unaffected. This substitute maintains full functional interchangeability with identical PCB footprint and thermal characteristics.

MMBZ5248BT-7-F (Diodes Incorporated): This part shares the core electrical specifications (18V nominal, ±5% tolerance, 21 Ohms impedance) but operates at a reduced maximum power dissipation of 150mW compared to the 200mW rating of the main part. The package configuration differs (SOT-523 versus SOT-323), resulting in different PCB footprint and lead spacing. This part is suitable for applications where the 150mW power rating is sufficient and the SOT-523 package is compatible with board layout. Both parts are ROHS3 compliant and REACH unaffected with extended temperature range to -65°C.

Frequently Asked Questions (FAQ)

Q: Can MMBZ5248BW-7-F be used as a direct replacement for MMBZ5248BW-TP?

A: Yes. The MMBZ5248BW-7-F is a direct electrical equivalent with identical Zener voltage (18V), power rating (200mW), impedance (21 Ohms), and SOT-323 package. Both parts share the same PCB footprint and thermal characteristics. The extended temperature range (-65°C to 150°C) of the MMBZ5248BW-7-F provides additional operational margin.

Q: What is the key difference between MMBZ5248BW-7-F and MMBZ5248BT-7-F?

A: The primary differences are power dissipation rating and package type. MMBZ5248BW-7-F is rated for 200mW in SOT-323 packaging, while MMBZ5248BT-7-F is rated for 150mW in SOT-523 packaging. Both maintain identical Zener voltage (18V), tolerance (±5%), and impedance (21 Ohms) specifications. The SOT-523 package has a different footprint and lead configuration than SOT-323.

Q: Is MMBZ5248BT-7-F suitable for applications requiring 200mW power dissipation?

A: No. The MMBZ5248BT-7-F is rated for a maximum of 150mW power dissipation. Applications requiring sustained 200mW operation must use parts rated for that power level, such as MMBZ5248BW-TP or MMBZ5248BW-7-F.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. MMBZ5248BW-TP, MMBZ5248BW-7-F, and MMBZ5248BT-7-F are all ROHS3 compliant and REACH unaffected.

Q: What is the impact of the different operating temperature ranges?

A: MMBZ5248BW-TP operates from -55°C to 150°C, while both MMBZ5248BW-7-F and MMBZ5248BT-7-F operate from -65°C to 150°C. The extended lower temperature limit of the substitute parts provides additional operational margin in cold environment applications. The upper temperature limit remains identical at 150°C across all parts.

Q: Can PCB layout be reused when substituting MMBZ5248BW-7-F for MMBZ5248BW-TP?

A: Yes. Both parts use identical SOT-323 packaging with the same PCB footprint and lead spacing. PCB layout and assembly processes require no modification.

Q: Can PCB layout be reused when substituting MMBZ5248BT-7-F for MMBZ5248BW-TP?

A: No. MMBZ5248BT-7-F uses SOT-523 packaging, which has a different footprint and lead configuration than the SOT-323 package of MMBZ5248BW-TP. PCB layout modification is required for this substitution.