CMPZ5247B BK PBFREE Equivalent & Substitute Parts

Part Overview

The CMPZ5247B BK PBFREE is a Zener diode manufactured by Central Semiconductor Corp, rated at 17 V nominal Zener voltage with 350 mW maximum power dissipation. This surface mount component in SOT-23 packaging is designed for voltage regulation and protection applications. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified based on matching electrical specifications and mechanical compatibility within the Zener diode category.

Substiute Parts

CMPZ5247B BK PBFREE

Central Semiconductor CorpIn Stock: 892CMPZ5247B BK PBFREE Datasheet

Current PartRFQ

MMBZ5247BLT1G

onsemiIn Stock: 38416MMBZ5247BLT1G Datasheet

MFR RecommendedRFQ

SZMMBZ5247BLT1G

onsemiIn Stock: 12880SZMMBZ5247BLT1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Primary Matching Criteria:

• Voltage - Zener (Nom): 17 V
• Tolerance: ±5%
• Impedance (Max): 19 Ohms
• Current - Reverse Leakage @ Vr: 100 nA @ 13 V
• Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA
• Operating Temperature Range: -65°C to 150°C
• Package / Case: TO-236-3, SC-59, SOT-23-3
• RoHS Status: ROHS3 Compliant
• MSL Rating: 1 (Unlimited)

Secondary Consideration:

• Power - Max: Substitute parts rated at 225 mW operate within the electrical envelope of the 350 mW main part and are acceptable for applications not requiring maximum power dissipation.

The identified substitutes maintain identical Zener voltage, tolerance, impedance, leakage current, forward voltage, temperature range, and compliance certifications. Packaging and mounting type are identical across all parts.

Parameter Comparison

Engineering Selection Recommendations

MMBZ5247BLT1G (onsemi): This substitute maintains all critical electrical parameters identical to the main part. The 225 mW power rating is lower than the 350 mW specification but operates within the electrical envelope for standard voltage regulation applications. The part is Active status with full RoHS3 compliance and unlimited MSL rating. Packaging is Tape & Reel format, suitable for automated assembly processes.

SZMMBZ5247BLT1G (onsemi): This substitute is electrically identical to MMBZ5247BLT1G and additionally carries Automotive grade qualification with AEC-Q101 certification. Selection of this part is appropriate for applications requiring automotive-grade components. The 225 mW power rating applies the same consideration as MMBZ5247BLT1G.

Both substitute parts are suitable for direct replacement in applications where the 350 mW power dissipation of the main part is not a limiting design requirement. All three parts share identical Zener voltage, tolerance, impedance, leakage current, forward voltage characteristics, temperature range, package type, and compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can MMBZ5247BLT1G replace CMPZ5247B BK PBFREE in all applications?

A: MMBZ5247BLT1G is electrically equivalent for voltage regulation and protection functions. The primary difference is the maximum power dissipation rating: 225 mW versus 350 mW. Substitution is valid for applications where the circuit does not require the full 350 mW dissipation capability. Verify the actual power dissipation requirement in your application before selection.

Q: What is the difference between MMBZ5247BLT1G and SZMMBZ5247BLT1G?

A: Both parts are electrically identical with 17 V Zener voltage, ±5% tolerance, 19 Ohms impedance, and 225 mW power rating. SZMMBZ5247BLT1G carries Automotive grade qualification and AEC-Q101 certification, making it suitable for automotive applications. MMBZ5247BLT1G is the standard industrial-grade equivalent.

Q: Are the package dimensions identical across all three parts?

A: Yes. All three parts use TO-236-3, SC-59, SOT-23-3 package specifications. The physical footprint and pin configuration are identical, enabling direct PCB layout compatibility.

Q: What is the significance of the ±5% tolerance specification?

A: The ±5% tolerance applies to the Zener voltage specification. This means the actual Zener voltage will fall within the range of 16.15 V to 17.85 V. All three parts share this identical tolerance specification.

Q: Does packaging format (Bulk versus Tape & Reel) affect electrical performance?

A: No. Packaging format affects only the delivery and handling method. Bulk and Tape & Reel formats contain identical components with identical electrical specifications. Selection between formats depends on assembly process requirements and inventory management practices.

Q: Are all three parts RoHS3 compliant?

A: Yes. CMPZ5247B BK PBFREE, MMBZ5247BLT1G, and SZMMBZ5247BLT1G all carry ROHS3 Compliant status with MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: What does AEC-Q101 qualification mean for SZMMBZ5247BLT1G?

A: AEC-Q101 is the automotive industry standard qualification for discrete semiconductors. SZMMBZ5247BLT1G meets this qualification, making it suitable for automotive applications requiring certified components. CMPZ5247B BK PBFREE and MMBZ5247BLT1G do not carry this certification.