FLZ10VB Zener Diode Equivalent & Substitute Parts

Part Overview

The FLZ10VB is a 9.7 V, 500 mW Zener diode manufactured by onsemi in SOD-80 surface mount packaging. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. The FLZ10VB operates across a temperature range of -65°C to 175°C with ±3% voltage tolerance and is suitable for voltage regulation and protection applications in surface mount assemblies.

Substiute Parts

FLZ10VB

onsemiIn Stock: 5201FLZ10VB Datasheet

Current PartRFQ

BZV55-B10,115

NXP SemiconductorsIn Stock: 352854BZV55-B10,115 Datasheet

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BZV55-C10,115

Nexperia USA Inc.In Stock: 11302BZV55-C10,115 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FLZ10VB is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Zener voltage nominal rating within acceptable circuit tolerance
• Power dissipation capacity of 500 mW minimum
• Surface mount package compatibility (SOD-80, DO-213AC, MINI-MELF)
• Operating temperature range coverage of -65°C minimum and 175°C maximum

Identified Substitute Parts:

The BZV55-B10,115 and BZV55-C10,115 are functionally equivalent alternatives. Both are manufactured by NXP Semiconductors / Nexperia USA Inc. and feature identical 500 mW power ratings and compatible SOD-80 surface mount packaging. The nominal Zener voltage of 10 V on these substitutes represents a 0.3 V deviation from the FLZ10VB specification, which falls within typical circuit design tolerances for voltage regulation applications. Both substitute parts maintain active product status and are in current production with substantial inventory availability.

Parameter Comparison

Engineering Selection Recommendations

BZV55-B10,115 Selection Criteria:

The BZV55-B10,115 is recommended for applications requiring tighter voltage tolerance control. This part features ±2% tolerance compared to the FLZ10VB's ±3%, providing improved voltage regulation accuracy. The lower impedance specification of 20 Ohms versus 6.6 Ohms on the original part results in slightly different dynamic response characteristics. The extended operating temperature range to 200°C provides additional thermal margin. This part maintains active product status with substantial inventory availability (352,780 pieces in stock) and full REACH compliance.

BZV55-C10,115 Selection Criteria:

The BZV55-C10,115 is suitable for cost-sensitive applications where voltage tolerance of ±5% is acceptable. This part shares identical electrical performance with the BZV55-B10,115 except for the relaxed tolerance specification. The BZV55-C10,115 is available in Cut Tape and Digi-Reel packaging options and carries RoHS3 compliance certification. Inventory availability is lower (11,289 pieces) compared to the BZV55-B10,115 variant.

Both substitute parts are manufactured by NXP Semiconductors / Nexperia entities, ensuring supply chain continuity and technical support. The 0.3 V nominal voltage difference (10 V versus 9.7 V) is within standard circuit design tolerances for Zener diode applications and does not preclude direct substitution in most voltage regulation and protection circuits.

Frequently Asked Questions (FAQ)

Q: Can the BZV55-B10,115 or BZV55-C10,115 be used as direct replacements for the FLZ10VB?

A: Yes. Both parts are functionally equivalent substitutes. They share identical 500 mW power ratings, compatible SOD-80 surface mount packaging, and overlapping operating temperature ranges. The 0.3 V nominal voltage difference (10 V versus 9.7 V) falls within acceptable tolerances for voltage regulation applications.

Q: What is the significance of the impedance difference between the FLZ10VB (6.6 Ohms) and the substitute parts (20 Ohms)?

A: Impedance affects the dynamic response of the Zener diode under transient conditions. The higher impedance of the substitute parts results in slightly slower voltage regulation response. For most standard voltage regulation and protection applications, this difference is not functionally significant. Circuit-specific analysis is required only for applications with stringent transient response requirements.

Q: How do the tolerance specifications affect substitution?

A: The FLZ10VB specifies ±3% tolerance. The BZV55-B10,115 offers tighter ±2% tolerance, providing improved voltage accuracy. The BZV55-C10,115 specifies ±5% tolerance, which is wider. Selection depends on circuit requirements for voltage regulation precision. Tighter tolerance parts provide better regulation accuracy but may have higher cost implications.

Q: Are the substitute parts available in the same packaging format?

A: Yes. Both BZV55-B10,115 and BZV55-C10,115 are available in DO-213AC, MINI-MELF, and SOD-80 packages, matching the FLZ10VB packaging options. The BZV55-C10,115 is additionally available in Cut Tape and Digi-Reel packaging formats.

Q: What is the difference between the BZV55-B10,115 and BZV55-C10,115?

A: The primary difference is voltage tolerance: BZV55-B10,115 specifies ±2% while BZV55-C10,115 specifies ±5%. All other electrical parameters are identical. The BZV55-C10,115 includes RoHS3 compliance certification. Selection between these variants depends on tolerance requirements and compliance specifications for the target application.

Q: Do the substitute parts support the full operating temperature range of the FLZ10VB?

A: Yes. Both substitute parts support -65°C to 200°C, which exceeds the FLZ10VB range of -65°C to 175°C. The extended upper temperature limit provides additional thermal margin for high-temperature applications.

Q: What is the inventory status of these substitute parts?

A: The BZV55-B10,115 has substantial inventory availability (352,780 pieces in stock). The BZV55-C10,115 has lower availability (11,289 pieces in stock). Both parts maintain active product status with ongoing manufacturing support.