FLZ11VC Equivalent & Substitute Parts

Part Overview

The FLZ11VC is a Zener diode manufactured by onsemi, rated at 11 V nominal with 500 mW power dissipation in a surface mount SOD-80 package. This component is classified as obsolete, indicating discontinued production and limited availability from original sources. Identification of equivalent substitute parts is necessary to maintain design continuity and ensure procurement of functionally compatible alternatives for new production runs or field replacements.

Substiute Parts

FLZ11VC

onsemiIn Stock: 2351FLZ11VC Datasheet

Current PartRFQ

BZV55-C11,135

NXP USA Inc.In Stock: 161148BZV55-C11,135 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FLZ11VC is determined by the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

• Nominal Zener voltage: 11 V (primary functional requirement)
• Power dissipation rating: 500 mW (thermal design constraint)
• Package type: SOD-80 / DO-213AC / MINI-MELF (mechanical and thermal interface)
• Mounting technology: Surface Mount (PCB assembly compatibility)

Acceptable Variation Ranges:

• Zener voltage tolerance: ±3% to ±5% (both within standard Zener diode specifications)
• Impedance: up to 20 Ohms (acceptable for voltage regulation applications)
• Reverse leakage current: up to 133 nA @ 8 V (low-leakage performance)
• Operating temperature: -65°C minimum to 175°C minimum (thermal envelope compatibility)

The BZV55-C11,135 manufactured by NXP USA Inc. meets all substitution criteria through equivalent electrical ratings and identical package geometry.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: BZV55-C11,135

The BZV55-C11,135 is the direct functional equivalent for the obsolete FLZ11VC. Selection of this substitute is based on the following factors:

• Electrical Equivalence: Identical 11 V nominal Zener voltage and 500 mW power rating ensure circuit performance parity.
• Package Compatibility: Identical SOD-80 / DO-213AC / MINI-MELF package geometry permits direct PCB footprint substitution without layout modification.
• Product Availability: Active production status with 161,099 units in stock ensures reliable procurement for current and future production requirements.
• Compliance Alignment: Both components share identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications, maintaining regulatory consistency.
• Temperature Performance: Extended operating range (-65 to 200°C) of the BZV55-C11,135 provides thermal margin beyond the original FLZ11VC specification (-65 to 175°C).

Tolerance Consideration: The BZV55-C11,135 tolerance of ±5% is wider than the FLZ11VC tolerance of ±3%. Circuit designs dependent on tighter voltage regulation should verify that ±5% tolerance remains within acceptable operating margins.

Frequently Asked Questions (FAQ)

Q: Can the BZV55-C11,135 be used as a direct replacement for the FLZ11VC without PCB modification?

A: Yes. Both components use identical SOD-80 / DO-213AC / MINI-MELF package geometry and surface mount technology. No PCB footprint or layout changes are required.

Q: What is the significance of the tolerance difference between ±3% and ±5%?

A: Tolerance defines the acceptable range of Zener voltage around the nominal 11 V rating. The FLZ11VC maintains 10.67 V to 11.33 V, while the BZV55-C11,135 maintains 10.45 V to 11.55 V. Circuit designs must confirm that the wider ±5% tolerance of the substitute remains within system voltage regulation requirements.

Q: Are there differences in impedance between these parts?

A: Yes. The FLZ11VC specifies 8.5 Ohms maximum impedance, while the BZV55-C11,135 specifies 20 Ohms maximum. Higher impedance results in slightly increased output impedance in voltage regulation applications. Designs with stringent impedance requirements should evaluate this parameter against circuit specifications.

Q: Does the operating temperature range difference affect substitution?

A: The BZV55-C11,135 extends to 200°C maximum, compared to 175°C for the FLZ11VC. This provides additional thermal margin and is compatible with all applications designed for the original part. No derating is required.

Q: What is the reverse leakage current difference?

A: The FLZ11VC specifies 133 nA @ 8 V, while the BZV55-C11,135 specifies 100 nA @ 8 V. The substitute exhibits lower leakage, which is advantageous for low-power applications and does not introduce compatibility issues.

Q: Are both components RoHS and REACH compliant?

A: The FLZ11VC is REACH Unaffected. Compliance documentation for the BZV55-C11,135 should be verified with the supplier for specific application requirements.

Q: What is the difference in forward voltage specifications?

A: The FLZ11VC specifies 1.2 V @ 200 mA, while the BZV55-C11,135 specifies 900 mV @ 10 mA. These measurements are taken at different current levels and are not directly comparable. Both values are within typical Zener diode forward voltage ranges and do not affect substitution compatibility.