FLZ13VB Zener Diode Equivalent & Substitute Parts

Part Overview

The FLZ13VB is a 12.9 V, 500 mW surface mount zener diode manufactured by onsemi in SOD-80 (DO-213AC, MINI-MELF) package. This component is classified as obsolete, indicating discontinuation from the manufacturer. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and ongoing system support.

Substiute Parts

FLZ13VB

onsemiIn Stock: 832FLZ13VB Datasheet

Current PartRFQ

BZV55-B13,115

Nexperia USA Inc.In Stock: 6618BZV55-B13,115 Datasheet

SimilarRFQ

BZV55-C13,115

Nexperia USA Inc.In Stock: 12050BZV55-C13,115 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FLZ13VB is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Zener voltage within acceptable circuit tolerance
• Power dissipation rating equal to or greater than 500 mW
• Operating temperature range encompassing -65°C to 175°C minimum
• Surface mount package compatibility (SOD-80, DO-213AC, MINI-MELF)

Substitute Parts Identified:

The BZV55-B13,115 and BZV55-C13,115 from Nexperia USA Inc. meet the substitution criteria. Both parts operate at 13 V nominal zener voltage with 500 mW power rating and surface mount SOD-80 packaging. The 13 V zener voltage represents a 0.8% deviation from the FLZ13VB nominal 12.9 V specification, which falls within typical circuit design tolerances for voltage regulation and protection applications. Both substitute parts maintain the same package footprint and thermal characteristics required for direct board-level replacement.

Parameter Comparison

Engineering Selection Recommendations

BZV55-B13,115 Selection: This substitute part is recommended for applications requiring tighter voltage tolerance control. The ±2% tolerance specification provides superior voltage regulation accuracy compared to the FLZ13VB ±3% tolerance. The part is active in production with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment. The extended operating temperature range to 200°C provides additional thermal margin beyond the original FLZ13VB specification.

BZV55-C13,115 Selection: This substitute part is suitable for applications where voltage tolerance is less critical. The ±5% tolerance is broader than the FLZ13VB specification but remains acceptable for general voltage regulation and transient protection circuits. This part offers the same active production status and ROHS3 compliance as the BZV55-B13,115. Higher inventory availability (11,959 pcs) compared to BZV55-B13,115 (6,560 pcs) may provide supply chain advantages.

Both substitute parts are manufactured by Nexperia USA Inc., an active supplier with established quality and compliance certifications. The transition from the obsolete FLZ13VB to either BZV55 variant requires circuit validation to confirm the 13 V nominal zener voltage is acceptable within the application's voltage regulation or protection requirements.

Frequently Asked Questions (FAQ)

Q: Can the BZV55-B13,115 and BZV55-C13,115 be used interchangeably with the FLZ13VB?

A: Both parts are direct substitutes from a mechanical and thermal standpoint, sharing identical SOD-80 package geometry and surface mount compatibility. Electrical interchangeability depends on circuit tolerance for the 13 V nominal zener voltage versus the original 12.9 V specification. The BZV55-B13,115 with ±2% tolerance provides closer voltage matching to the FLZ13VB ±3% specification.

Q: What is the voltage difference between the FLZ13VB and substitute parts?

A: The FLZ13VB operates at 12.9 V nominal, while both BZV55 variants operate at 13 V nominal. This represents a 0.8% increase in zener voltage. For voltage regulation applications, this difference is typically within acceptable design margins. For precision voltage reference applications, circuit-level validation is required.

Q: Are the substitute parts available in the same package?

A: Yes. Both BZV55-B13,115 and BZV55-C13,115 are supplied in DO-213AC, MINI-MELF, SOD-80 package configurations, identical to the FLZ13VB. No PCB layout modifications are required for direct substitution.

Q: What is the difference between BZV55-B13,115 and BZV55-C13,115?

A: The primary difference is voltage tolerance specification. The BZV55-B13,115 features ±2% tolerance, while the BZV55-C13,115 features ±5% tolerance. Both parts share identical power rating (500 mW), package type, and operating temperature range. Selection depends on the circuit's voltage tolerance requirements.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both BZV55-B13,115 and BZV55-C13,115 are ROHS3 compliant. The FLZ13VB RoHS status is not specified in available documentation.

Q: What is the operating temperature range for the substitute parts?

A: Both BZV55 variants operate from -65°C to 200°C, which exceeds the FLZ13VB range of -65°C to 175°C. This provides additional thermal margin for high-temperature applications.

Q: Are there inventory considerations for selecting between the two substitute parts?

A: Yes. The BZV55-C13,115 has significantly higher inventory availability (11,959 pcs) compared to BZV55-B13,115 (6,560 pcs). If supply chain continuity is a priority and voltage tolerance permits, the BZV55-C13,115 may be preferred.