FLZ15VB Equivalent & Substitute Parts

Part Overview

The FLZ15VB is a Zener diode manufactured by onsemi, rated at 14.3 V nominal with 500 mW power dissipation in a surface mount SOD-80 package. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. The FLZ15VB serves applications requiring precision voltage regulation and transient suppression in low-power circuits.

Key Parameters

Parameter	Value
Voltage - Zener (Nom) (Vz)	14.3 V
Tolerance	±3%
Power - Max	500 mW
Impedance (Max) (Zzt)	13.3 Ohms
Current - Reverse Leakage @ Vr	133 nA @ 11 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA
Operating Temperature Range	-65°C ~ 175°C
Mounting Type	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the FLZ15VB is determined by the following critical parameters:

Electrical Compatibility Criteria:

Zener voltage within acceptable circuit tolerance (nominal voltage range 14.3 V to 15 V)
Power dissipation rating of 500 mW minimum
Surface mount package configuration (SOD-80 / MINI-MELF / DO-213AC)
Operating temperature range encompassing -65°C to 175°C minimum

Substitute Identification: The BZV55-B15,115 manufactured by Nexperia USA Inc. meets the substitution criteria. This part maintains the same 500 mW power rating, surface mount package family, and operating temperature envelope. The nominal Zener voltage of 15 V represents a 0.7 V differential from the FLZ15VB, which falls within typical circuit tolerance margins for voltage regulation applications. Both components feature identical package designations (DO-213AC, MINI-MELF, SOD-80) and MSL ratings.

Parameter Comparison

Parameter	FLZ15VB (onsemi)	BZV55-B15,115 (Nexperia USA Inc.)
Voltage - Zener (Nom) (Vz)	14.3 V	15 V
Tolerance	±3%	±2%
Power - Max	500 mW	500 mW
Impedance (Max) (Zzt)	13.3 Ohms	30 Ohms
Current - Reverse Leakage @ Vr	133 nA @ 11 V	50 nA @ 10.5 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA	900 mV @ 10 mA
Operating Temperature Range	-65°C ~ 175°C	-65°C ~ 200°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active

Engineering Selection Recommendations

The BZV55-B15,115 is the identified substitute for the obsolete FLZ15VB. Selection of this substitute is supported by the following factors:

Product Status: The BZV55-B15,115 maintains active product status with current manufacturing and distribution, ensuring long-term availability and supply chain continuity compared to the obsolete FLZ15VB.

Compliance and Certifications: Both components share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS codes (8541.10.0050). The BZV55-B15,115 carries RoHS3 compliance certification, providing additional regulatory alignment for modern applications.

Electrical Performance: The BZV55-B15,115 delivers equivalent power handling (500 mW) and surface mount package compatibility. The 15 V nominal Zener voltage represents a 0.7 V increase from the FLZ15VB, which is within acceptable tolerance for most voltage regulation circuits. The improved tolerance specification (±2% versus ±3%) provides enhanced voltage accuracy.

Thermal Capability: The BZV55-B15,115 extends the upper operating temperature limit to 200°C, exceeding the FLZ15VB specification of 175°C and providing additional thermal margin for high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can the BZV55-B15,115 directly replace the FLZ15VB in existing designs?

A: The BZV55-B15,115 is electrically compatible for most applications requiring the FLZ15VB. Both components share identical power ratings (500 mW), package configurations (SOD-80 / MINI-MELF / DO-213AC), and operating temperature minimums (-65°C). The 0.7 V nominal voltage difference (14.3 V to 15 V) is within typical circuit tolerance margins. Circuit validation is required to confirm voltage regulation performance in specific applications.

Q: What are the key differences between these two Zener diodes?

A: The primary differences are: (1) Nominal Zener voltage: FLZ15VB at 14.3 V versus BZV55-B15,115 at 15 V; (2) Voltage tolerance: FLZ15VB at ±3% versus BZV55-B15,115 at ±2%; (3) Impedance: FLZ15VB at 13.3 Ohms maximum versus BZV55-B15,115 at 30 Ohms maximum; (4) Product status: FLZ15VB is obsolete while BZV55-B15,115 is active; (5) Upper operating temperature: FLZ15VB at 175°C versus BZV55-B15,115 at 200°C.

Q: Are the package dimensions identical between these parts?

A: Both components utilize the same package family designations: DO-213AC, MINI-MELF, and SOD-80. Physical footprints and land patterns are compatible for surface mount assembly.

Q: What is the impact of the impedance difference on circuit performance?

A: The BZV55-B15,115 exhibits higher maximum impedance (30 Ohms) compared to the FLZ15VB (13.3 Ohms). This parameter affects transient response and voltage regulation stability. Applications requiring low impedance characteristics for high-frequency transient suppression should evaluate this specification against circuit requirements.

Q: Does the BZV55-B15,115 offer improved reliability compared to the obsolete FLZ15VB?

A: The BZV55-B15,115 maintains active product status with current manufacturing processes and quality control. Both components share identical MSL ratings (1 - Unlimited) and REACH compliance status. The BZV55-B15,115 includes RoHS3 certification, aligning with modern regulatory requirements.

Q: What is the significance of the reverse leakage current difference?

A: The BZV55-B15,115 demonstrates lower reverse leakage current (50 nA @ 10.5 V) compared to the FLZ15VB (133 nA @ 11 V). Lower leakage current reduces standby power consumption and improves circuit efficiency in applications with extended idle periods.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message