NZ9F16VT5G Equivalent & Substitute Parts

Part Overview

The NZ9F16VT5G is a Zener diode manufactured by onsemi, rated at 16 V nominal voltage with 250 mW maximum power dissipation in a surface mount SOD-923 package. This component is classified as Active and is ROHS3 compliant. Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging is required for design modifications, or when different electrical tolerances are needed for specific circuit requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	16	V
Tolerance	±5%	-
Power - Max	250	mW
Impedance (Max)	50	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 12 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	SOD-923	-

Substitute Part Grouping Explanation

Substitution of the NZ9F16VT5G is determined by the following critical parameters: nominal Zener voltage (16 V), maximum power dissipation capability, voltage tolerance, and surface mount package compatibility. All substitute parts listed maintain the 16 V nominal Zener voltage specification. Substitutes are grouped based on power rating and package type.

Group 1: Higher Power Rating, Alternative Package (SOD-523)

BZX585-B16,115 and BZX585-C16,115 provide 300 mW maximum power dissipation compared to the 250 mW of the main part, with improved impedance characteristics (40 Ohms vs. 50 Ohms). These parts use the SOD-523 package instead of SOD-923.

Group 2: Equivalent Power Rating, Alternative Package (DFN1006-2)

BZX884-C16,315 maintains the 250 mW power rating and ±5% tolerance but uses a DFN1006-2 package (SOD-882 case). This part is classified as Obsolete and is not ROHS3 compliant.

Parameter Comparison

Parameter	NZ9F16VT5G	BZX585-B16,115	BZX585-C16,115	BZX884-C16,315
Manufacturer	onsemi	Nexperia USA Inc.	NXP USA Inc.	NXP Semiconductors
Voltage - Zener (Nom)	16 V	16 V	16 V	16 V
Tolerance	±5%	±2%	±5%	±5%
Power - Max	250 mW	300 mW	300 mW	250 mW
Impedance (Max)	50 Ohms	40 Ohms	40 Ohms	40 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 12 V	50 nA @ 11.2 V	50 nA @ 11.2 V	50 nA @ 11.2 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	1.1 V @ 100 mA	1.1 V @ 100 mA	900 mV @ 10 mA
Operating Temperature	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C
Package / Case	SOD-923	SOD-523	SOD-523	SOD-882
Product Status	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant

Engineering Selection Recommendations

BZX585-B16,115 (Nexperia USA Inc.) This substitute is suitable for applications requiring tighter voltage tolerance (±2% vs. ±5%) and higher power dissipation capability (300 mW vs. 250 mW). The part is Active, ROHS3 compliant, and carries AEC-Q101 automotive qualification. The SOD-523 package requires PCB layout modification from the original SOD-923 design. Lower reverse leakage current (50 nA vs. 100 nA) provides improved performance in low-current applications.

BZX585-C16,115 (NXP USA Inc.) This substitute maintains the ±5% tolerance specification of the main part while providing 300 mW power dissipation and improved impedance characteristics. The part is Active and ROHS3 compliant. The SOD-523 package requires PCB layout modification. This option is suitable when higher power capability is needed without tolerance tightening.

BZX884-C16,315 (NXP Semiconductors) This substitute maintains the 250 mW power rating and ±5% tolerance but is classified as Obsolete and is not ROHS3 compliant. The DFN1006-2 package (SOD-882) differs from the original SOD-923. This part is not recommended for new designs due to obsolete status and non-compliance with current environmental standards.

Frequently Asked Questions (FAQ)

Q: Can BZX585-B16,115 and BZX585-C16,115 be used interchangeably with NZ9F16VT5G? A: Both BZX585 series parts are electrically compatible as 16 V Zener diodes with equivalent or superior specifications. However, they use the SOD-523 package instead of SOD-923, requiring PCB layout changes. The primary difference between the two BZX585 variants is tolerance: BZX585-B16,115 offers ±2% tolerance while BZX585-C16,115 maintains ±5% tolerance matching the original part.

Q: What are the package differences between these substitute parts? A: The NZ9F16VT5G uses SOD-923 packaging. BZX585-B16,115 and BZX585-C16,115 use SOD-523 packaging (SC-79 case). BZX884-C16,315 uses DFN1006-2 packaging (SOD-882 case). Each package has different footprint dimensions and land patterns, requiring circuit board redesign for physical substitution.

Q: Why does BZX884-C16,315 show as Obsolete? A: BZX884-C16,315 is classified as Obsolete by the manufacturer and does not meet current ROHS3 compliance requirements. This part should not be selected for new product designs or long-term production applications.

Q: What is the significance of the impedance difference between the main part and substitutes? A: The NZ9F16VT5G has 50 Ohms maximum impedance, while BZX585 and BZX884 series parts have 40 Ohms maximum impedance. Lower impedance provides better voltage regulation and faster transient response in Zener diode applications. This represents an improvement in performance characteristics.

Q: Are all substitute parts ROHS3 compliant? A: BZX585-B16,115, BZX585-C16,115, and NZ9F16VT5G are all ROHS3 compliant. BZX884-C16,315 is not ROHS3 compliant and is classified as RoHS non-compliant, making it unsuitable for applications requiring environmental compliance.

Q: What is the difference in reverse leakage current specifications? A: The NZ9F16VT5G specifies 100 nA reverse leakage at 12 V, while BZX585-B16,115 and BZX585-C16,115 specify 50 nA at 11.2 V. Lower reverse leakage current indicates better diode quality and reduced power consumption in standby conditions.

Q: Can I use a higher power-rated substitute in a circuit designed for 250 mW? A: Yes. BZX585-B16,115 and BZX585-C16,115 with 300 mW ratings are suitable for circuits designed for 250 mW operation. The higher power rating provides additional thermal margin and does not negatively affect circuit performance when the actual power dissipation remains within the original 250 mW specification.

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