DFLZ5V1-TP Zener Diode 5.1V 1W Equivalent & Substitute Parts

Part Overview

The DFLZ5V1-TP is a 5.1 V, 1 W surface mount zener diode manufactured by Micro Commercial Co in SOD-123FL packaging. This component is designed for voltage regulation and protection applications requiring precise zener voltage characteristics at elevated power dissipation levels. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching core electrical parameters: nominal zener voltage, package compatibility, surface mount technology, and operating temperature range. Alternative sources provide design flexibility, supply chain redundancy, and procurement options while maintaining functional equivalence within specified tolerance bands.

Key Parameters

Parameter	Value	Unit	Specification Basis
Voltage - Zener (Nom)	5.1	V	Primary functional specification
Power - Max	1	W	Thermal and dissipation rating
Tolerance	±5%	%	Voltage accuracy band
Package / Case	SOD-123F	—	Physical and electrical interface
Mounting Type	Surface Mount	—	Assembly technology
Operating Temperature	-55°C ~ 150°C	°C	Functional range (TJ)
RoHS Status	ROHS3 Compliant	—	Environmental compliance

Substitute Part Grouping Explanation

Substitution eligibility for the DFLZ5V1-TP is determined by the following criteria:

Primary Matching Parameters:

Nominal zener voltage of 5.1 V (core functional requirement)
SOD-123F package compatibility (physical and electrical interface)
Surface mount technology (assembly compatibility)
Operating temperature range encompassing or exceeding -55°C to 150°C
RoHS3 compliance (regulatory alignment)

Secondary Consideration Parameters:

Zener voltage tolerance within acceptable design margins
Power dissipation rating (minimum 1 W for direct substitution; lower ratings require application review)
Impedance and leakage characteristics (application-dependent)

The substitute part BZT52HC5V1WF-7 meets all primary matching parameters and maintains functional equivalence for standard voltage regulation and protection applications.

Parameter Comparison

Parameter	DFLZ5V1-TP (Main)	BZT52HC5V1WF-7 (Substitute)	Unit
Manufacturer	Micro Commercial Co	Diodes Incorporated	—
Voltage - Zener (Nom)	5.1	5.1	V
Tolerance	±5%	±5.88%	%
Power - Max	1	0.375	W
Impedance (Max)	7	60	Ohms
Current - Reverse Leakage @ Vr	10 µA @ 1 V	2 µA @ 2 V	µA
Voltage - Forward (Vf) (Max)	1.2 V @ 200 mA	900 mV @ 10 mA	V @ mA
Operating Temperature	-55°C ~ 150°C	-65°C ~ 150°C	°C
Package / Case	SOD-123F	SOD-123F	—
Mounting Type	Surface Mount	Surface Mount	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	—
Product Status	Active	Active	—
Qualification	—	AEC-Q101	—

Engineering Selection Recommendations

DFLZ5V1-TP (Primary Selection):

Specified for applications requiring 1 W maximum power dissipation
Standard industrial-grade zener diode with Active product status
RoHS3 compliant with unlimited moisture sensitivity rating
Suitable for general-purpose voltage regulation and transient protection circuits

BZT52HC5V1WF-7 (Substitute Selection):

Automotive-grade component with AEC-Q101 qualification
Specified for applications with maximum 375 mW power dissipation
Extended lower operating temperature limit (-65°C vs. -55°C)
RoHS3 compliant with unlimited moisture sensitivity rating
Lower impedance tolerance (60 Ohms vs. 7 Ohms) and reduced reverse leakage current

Selection Criteria:

Use DFLZ5V1-TP for standard industrial applications requiring full 1 W dissipation capability
Use BZT52HC5V1WF-7 for automotive applications, extended temperature range requirements, or when AEC-Q101 qualification is mandated
Verify application power dissipation does not exceed 375 mW when substituting with BZT52HC5V1WF-7
Both parts maintain identical 5.1 V nominal zener voltage and SOD-123F package compatibility

Frequently Asked Questions (FAQ)

Q: Can BZT52HC5V1WF-7 directly replace DFLZ5V1-TP in all applications?

A: Direct substitution is valid for applications where power dissipation does not exceed 375 mW. The DFLZ5V1-TP is rated for 1 W maximum dissipation, while BZT52HC5V1WF-7 is rated for 375 mW. Verify circuit power requirements before substitution.

Q: Are the package dimensions identical between these parts?

A: Both parts use SOD-123F package. Physical dimensions and PCB footprints are compatible for direct board-level substitution.

Q: What is the difference in zener voltage tolerance between these parts?

A: DFLZ5V1-TP specifies ±5% tolerance, while BZT52HC5V1WF-7 specifies ±5.88% tolerance. Both maintain 5.1 V nominal voltage. Applications with tight voltage regulation requirements should account for the wider tolerance band of the substitute part.

Q: Why does BZT52HC5V1WF-7 have AEC-Q101 qualification?

A: AEC-Q101 is an automotive industry qualification standard. BZT52HC5V1WF-7 is designed and tested for automotive applications, providing additional reliability assurance for vehicle-grade circuits.

Q: Can DFLZ5V1-TP be used in automotive applications?

A: DFLZ5V1-TP is industrial-grade without automotive qualification. For automotive applications requiring AEC-Q101 compliance, use BZT52HC5V1WF-7.

Q: What is the impedance difference and does it affect circuit performance?

A: DFLZ5V1-TP specifies 7 Ohms maximum impedance; BZT52HC5V1WF-7 specifies 60 Ohms maximum. Higher impedance affects voltage regulation response under load transients. Applications requiring fast transient response should use the lower impedance DFLZ5V1-TP.

Q: Are both parts RoHS3 compliant?

A: Yes, both DFLZ5V1-TP and BZT52HC5V1WF-7 are RoHS3 compliant with REACH Unaffected status.

Q: What is the operating temperature range difference?

A: DFLZ5V1-TP operates from -55°C to 150°C. BZT52HC5V1WF-7 operates from -65°C to 150°C, providing 10°C additional low-temperature capability.

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