MMBZ5237B-TP Zener Diode 8.2V 350mW SOT-23 Equivalent & Substitute Parts

Part Overview

The MMBZ5237B-TP is an 8.2 V Zener diode rated for 350 mW maximum power dissipation in a surface mount SOT-23 package. Manufactured by Micro Commercial Co, this component is classified as Active and RoHS3 compliant. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific performance requirements where alternative electrical or mechanical characteristics are acceptable within system design parameters.

Substiute Parts

MMBZ5237B-TP

Micro Commercial CoIn Stock: 1233MMBZ5237B-TP Datasheet

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MMBZ5237B-7-F

Diodes IncorporatedIn Stock: 23466MMBZ5237B-7-F Datasheet

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BZX84B8V2LT1G

onsemiIn Stock: 35274BZX84B8V2LT1G Datasheet

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BZX84C8V2-7-F

Diodes IncorporatedIn Stock: 62490BZX84C8V2-7-F Datasheet

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BZX84C8V2LT1G

onsemiIn Stock: 596373BZX84C8V2LT1G Datasheet

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MMBZ5237BLT1G

onsemiIn Stock: 50239MMBZ5237BLT1G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MMBZ5237B-TP are classified based on electrical and mechanical compatibility within the following criteria:

Primary Substitution Criteria:

• Zener voltage: 8.2 V nominal
• Package type: SOT-23-3 surface mount
• Mounting compatibility: Surface mount
• RoHS3 compliance: Required
• Operating temperature range: Minimum -55°C to 150°C

Electrical Parameter Tolerance: Substitutes are grouped by maximum power rating (350 mW, 300 mW, 250 mW, or 225 mW), impedance characteristics (8 Ohms or 15 Ohms), and voltage tolerance (±2%, ±5%, or ±6%). Parts with lower power ratings or higher impedance values represent reduced performance capability and are suitable only where application power dissipation requirements permit.

Packaging Variation: Substitute parts are available in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats. Both packaging types support identical electrical performance and mechanical fit.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Identical Electrical Performance): MMBZ5237B-7-F (Diodes Incorporated) is a direct equivalent with matching 350 mW power rating, 8 Ohm impedance, and ±5% tolerance. This part extends the operating temperature range to -65°C and maintains all electrical specifications. Selection is appropriate for applications requiring identical performance characteristics with extended low-temperature operation.

Reduced Power Rating Substitutes: BZX84C8V2-7-F, BZX84C8V2LT1G, BZX84B8V2LT1G, and MMBZ5237BLT1G feature reduced maximum power dissipation (300 mW, 250 mW, or 225 mW). These parts are suitable for applications where circuit power dissipation does not exceed the substitute part's rating. All substitute parts maintain the 8.2 V nominal zener voltage and SOT-23-3 package compatibility.

Impedance Variation: BZX84 series parts (BZX84C8V2-7-F, BZX84C8V2LT1G, BZX84B8V2LT1G) feature 15 Ohm maximum impedance compared to 8 Ohm impedance in MMBZ5237 series parts. Higher impedance affects dynamic response characteristics and is acceptable where circuit design accommodates this parameter difference.

Compliance and Status: All listed substitute parts are Active, RoHS3 compliant, and REACH unaffected. All parts support surface mount assembly in SOT-23-3 packages with identical mechanical fit and PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can MMBZ5237B-7-F replace MMBZ5237B-TP in all applications? A: Yes. MMBZ5237B-7-F is electrically and mechanically identical to MMBZ5237B-TP with extended operating temperature range (-65°C to 150°C versus -55°C to 150°C). Direct substitution is supported without circuit modification.

Q: What is the impact of using a lower power-rated substitute such as BZX84C8V2LT1G (250 mW) instead of the original 350 mW part? A: Lower power-rated substitutes are suitable only when circuit power dissipation does not exceed the substitute part's maximum rating. Exceeding the power rating results in component failure. Verify application power dissipation before selection.

Q: Are BZX84 series parts (15 Ohm impedance) compatible with circuits designed for MMBZ5237 series (8 Ohm impedance)? A: BZX84 series parts are mechanically and electrically compatible in SOT-23-3 packages with identical zener voltage. Higher impedance affects transient response and regulation characteristics. Compatibility depends on circuit design tolerance for impedance variation. Verify circuit performance requirements before substitution.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging? A: Both packaging formats contain identical components with different delivery and handling methods. Tape & Reel provides continuous reel format for automated assembly. Cut Tape & Digi-Reel provides individual tape segments or reel format. Electrical and mechanical performance is identical. Selection depends on assembly equipment and inventory management requirements.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts are RoHS3 compliant and REACH unaffected, meeting regulatory requirements for electronic component use in regulated markets.

Q: Can BZX84B8V2LT1G (±2% tolerance) be used where ±5% tolerance is specified? A: Yes. BZX84B8V2LT1G provides tighter voltage tolerance (±2%) than the original specification (±5%), resulting in improved voltage regulation accuracy. This represents enhanced performance and is suitable for applications requiring tighter voltage control.

Q: What is the minimum operating temperature difference between the original part and substitutes? A: MMBZ5237B-TP operates from -55°C to 150°C. All substitute parts extend the minimum operating temperature to -65°C, providing 10°C additional low-temperature capability. This difference is significant only for applications operating below -55°C.