BZX84J-C16,115 Equivalent & Substitute Parts

Part Overview

The BZX84J-C16,115 is a 16 V, 550 mW Zener diode manufactured by Nexperia USA Inc. in SOD-323F surface mount package. This component is classified as Active product status and carries automotive-grade qualification under AEC-Q101. The device is designed for voltage regulation and protection applications requiring precise 16 V reference voltage with ±5% tolerance.

Substitute parts are identified when equivalent electrical performance can be achieved through alternative manufacturers while maintaining critical functional parameters: nominal Zener voltage, power dissipation capability, operating temperature range, and surface mount packaging compatibility. Substitutes may differ in package form factor (SOD-523 vs. SOD-323F), impedance characteristics, and voltage tolerance specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	16	V
Tolerance	±5	%
Power - Max	550	mW
Impedance (Max)	20	Ohms
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount
Package / Case	SOD-323F
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution logic for the BZX84J-C16,115 is based on the following critical parameters:

Primary Matching Criteria:

Nominal Zener voltage: 16 V
Operating temperature range: -65°C to 150°C
Surface mount mounting type
Automotive grade classification
AEC-Q101 qualification

Secondary Compatibility Factors:

Power dissipation: 500 mW to 550 mW range
Voltage tolerance: ±5% to ±6%
Impedance: 20 to 40 Ohms
Reverse leakage current: 50 nA @ 11.2 V

Package Consideration: The primary substitute MM5Z16VT1G and SZMM5Z16VT1G utilize SOD-523 package instead of SOD-323F. Both packages are surface mount configurations with different physical footprints. SOD-523 is smaller than SOD-323F, requiring PCB layout verification before substitution.

Parts with different nominal Zener voltages (10 V, 18 V, 24 V, 27 V, 3 V, 3.3 V, 4.7 V) are listed for reference but do not qualify as direct substitutes due to voltage specification mismatch.

Parameter Comparison

Parameter	BZX84J-C16,115	MM5Z16VT1G	SZMM5Z16VT1G
Manufacturer	Nexperia USA Inc.	onsemi	onsemi
Voltage - Zener (Nom)	16 V	16 V	16 V
Tolerance	±5%	±5.6%	±6%
Power - Max	550 mW	500 mW	500 mW
Impedance (Max)	20 Ohms	40 Ohms	40 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 11.2 V	50 nA @ 11.2 V	50 nA @ 11.2 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 100 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-65°C to 150°C	-65°C to 150°C	-65°C to 150°C
Grade	Automotive	Not specified	Automotive
Qualification	AEC-Q101	Not specified	AEC-Q101
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-323F	SOD-523	SOD-523
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Substitute - SZMM5Z16VT1G (onsemi):

SZMM5Z16VT1G is the primary equivalent substitute for BZX84J-C16,115. Both devices share identical nominal Zener voltage (16 V), operating temperature range (-65°C to 150°C), automotive grade classification, and AEC-Q101 qualification. The substitute maintains 50 nA reverse leakage current at 11.2 V, matching the original specification. Power dissipation differs by 50 mW (500 mW vs. 550 mW), which is acceptable for most applications within the 16 V regulation class. Impedance increases from 20 Ohms to 40 Ohms; this parameter change requires circuit analysis to confirm acceptable performance in the target application. Voltage tolerance widens from ±5% to ±6%, introducing 0.96 V maximum deviation versus 0.80 V for the original part. Package transition from SOD-323F to SOD-523 requires PCB layout modification due to different footprint dimensions.

Secondary Substitute - MM5Z16VT1G (onsemi):

MM5Z16VT1G provides 16 V Zener voltage with 500 mW power rating and SOD-523 package. This part lacks specified automotive grade and AEC-Q101 qualification, limiting applicability to non-automotive applications. Impedance specification of 40 Ohms and ±5.6% tolerance are comparable to SZMM5Z16VT1G. Forward voltage specification differs (900 mV @ 10 mA vs. 1.1 V @ 100 mA), reflecting different test conditions rather than functional incompatibility.

Non-Substitutable Parts Listed:

Parts with alternative Zener voltages (SZMM5Z10VT1G, SZMM5Z18VT1G, SZMM5Z24VT1G, SZMM5Z27VT1G, SZMM5Z3V0T1G, SZMM5Z3V3T1G, SZMM5Z4V7ST1G, SZMM5Z4V7ST5G) do not qualify as substitutes due to voltage specification mismatch. These parts are included in the reference list for applications requiring alternative voltage regulation points.

Frequently Asked Questions (FAQ)

Q: Can SZMM5Z16VT1G replace BZX84J-C16,115 in automotive applications?

A: Yes. SZMM5Z16VT1G maintains automotive grade classification and AEC-Q101 qualification identical to the original part. Both operate across -65°C to 150°C temperature range with matching 16 V nominal Zener voltage and 50 nA reverse leakage specification. PCB layout modification is required due to SOD-523 package footprint difference from SOD-323F.

Q: What is the impact of impedance change from 20 Ohms to 40 Ohms?

A: Impedance (Zzt) affects dynamic resistance and voltage regulation stability under load transients. The 20 Ohm increase in maximum impedance may impact circuit performance in applications with stringent voltage ripple requirements. Circuit simulation or bench testing is necessary to confirm acceptable performance in the specific application.

Q: Why does MM5Z16VT1G lack automotive qualification?

A: MM5Z16VT1G is not specified with automotive grade or AEC-Q101 qualification. This part is suitable for industrial and consumer applications but does not meet automotive reliability and qualification standards required for vehicle-mounted systems.

Q: Are SOD-323F and SOD-523 packages interchangeable?

A: No. SOD-323F and SOD-523 are distinct surface mount packages with different physical dimensions and PCB footprints. SOD-523 is smaller than SOD-323F. PCB layout redesign is required to accommodate the alternative package. Verify land pattern compatibility with your PCB design tools before component selection.

Q: What is the significance of voltage tolerance change from ±5% to ±6%?

A: Tolerance specification defines the maximum deviation from nominal Zener voltage across temperature and manufacturing variation. BZX84J-C16,115 tolerance of ±5% permits maximum deviation of ±0.80 V (15.2 V to 16.8 V). SZMM5Z16VT1G tolerance of ±6% permits ±0.96 V deviation (15.04 V to 16.96 V). Applications with tight voltage regulation requirements must account for this 0.16 V additional tolerance band.

Q: Is RoHS3 compliance maintained across all substitutes?

A: Yes. BZX84J-C16,115, MM5Z16VT1G, and SZMM5Z16VT1G all carry ROHS3 Compliant status. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level.

Q: Can parts with different Zener voltages be used as substitutes?

A: No. Zener voltage is the primary functional parameter. Parts with alternative voltages (3 V, 3.3 V, 4.7 V, 10 V, 18 V, 24 V, 27 V) perform different voltage regulation functions and are not substitutable for 16 V applications. These parts are listed for reference only when alternative voltage regulation points are required.

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