DFLZ22-7 Equivalent & Substitute Parts

Part Overview

The DFLZ22-7 is a Zener diode rated at 22 V nominal voltage with 1 W maximum power dissipation, manufactured by Diodes Incorporated in the PowerDI™ 123 surface mount package. This component is classified as Active and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance can be achieved within the specified tolerance and operating parameters while maintaining compatibility with the application circuit requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	22	V
Tolerance	±6%	%
Power - Max	1	W
Impedance (Max)	15	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 16 V
Voltage - Forward (Max) @ If	1.2	V @ 200 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	PowerDI™ 123	—

Substitute Part Grouping Explanation

Substitution of the DFLZ22-7 is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage nominal value: 22 V
Tolerance band: ±6% or tighter
Power dissipation capability: minimum 1 W for direct substitution
Surface mount technology compatibility
Operating temperature range: -55°C to 150°C minimum

Secondary Compatibility Factors:

Impedance characteristics (Zzt)
Reverse leakage current specifications
Forward voltage characteristics
Package footprint and lead configuration
RoHS and REACH compliance status

The identified substitute parts meet the primary matching criteria for zener voltage and tolerance. However, differences in power rating, package type, and impedance characteristics must be evaluated against specific application requirements.

Parameter Comparison

Parameter	DFLZ22-7 (Main)	BZT52H-C22,115	NZH22C,115
Manufacturer	Diodes Incorporated	Nexperia USA Inc.	Nexperia USA Inc.
Voltage - Zener (Nom)	22 V	22 V	22 V
Tolerance	±6%	±5%	±3%
Power - Max	1 W	375 mW	500 mW
Impedance (Max)	15 Ohms	25 Ohms	30 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 16 V	50 nA @ 15.4 V	40 nA @ 17 V
Voltage - Forward (Max) @ If	1.2 V @ 200 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature Range	-55 to 150 °C	-65 to 150 °C	-55 to 150 °C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	PowerDI™ 123	SOD-123F	SOD-123F
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

DFLZ22-7 (Diodes Incorporated)

Primary selection for applications requiring 1 W power dissipation in the PowerDI™ 123 package. Active product status with full ROHS3 compliance and REACH unaffected designation. Suitable for high-power zener regulation circuits.

BZT52H-C22,115 (Nexperia USA Inc.)

Automotive-grade substitute with AEC-Q101 qualification. Power rating of 375 mW limits application to lower-power circuits. SOD-123F package requires PCB layout modification from PowerDI™ 123. Tighter tolerance (±5%) and lower reverse leakage current (50 nA @ 15.4 V) provide improved voltage regulation stability. Operating temperature range extends to -65°C.

NZH22C,115 (Nexperia USA Inc.)

Automotive-grade substitute with AEC-Q100 qualification. Power rating of 500 mW provides intermediate capability between the main part and BZT52H-C22,115. SOD-123F package requires PCB layout modification. Tightest tolerance specification (±3%) and lowest reverse leakage current (40 nA @ 17 V) deliver superior voltage regulation performance. Operating temperature range matches the main part at -55°C to 150°C.

Frequently Asked Questions (FAQ)

Q: Can BZT52H-C22,115 directly replace DFLZ22-7 in all applications?

A: BZT52H-C22,115 is electrically compatible for zener voltage and tolerance specifications. However, the 375 mW power rating is 62.5% lower than the 1 W rating of DFLZ22-7. Applications requiring sustained power dissipation above 375 mW will experience thermal stress. Additionally, the SOD-123F package differs from PowerDI™ 123, requiring PCB footprint modification.

Q: What is the primary difference between BZT52H-C22,115 and NZH22C,115?

A: Both parts share the same 22 V zener voltage and SOD-123F package. NZH22C,115 provides 500 mW power rating versus 375 mW for BZT52H-C22,115, and features tighter tolerance (±3% versus ±5%) with lower reverse leakage current (40 nA versus 50 nA). NZH22C,115 is qualified to AEC-Q100 while BZT52H-C22,115 is qualified to AEC-Q101.

Q: Are package changes between PowerDI™ 123 and SOD-123F significant?

A: Yes. PowerDI™ 123 and SOD-123F are distinct surface mount packages with different footprints, lead configurations, and thermal characteristics. PCB layout redesign is required when substituting between these packages. Verify pad dimensions and thermal performance requirements before implementation.

Q: Which substitute part offers the best voltage regulation performance?

A: NZH22C,115 provides the tightest tolerance specification (±3%) and lowest reverse leakage current (40 nA @ 17 V), resulting in superior voltage regulation stability and reduced temperature drift compared to both DFLZ22-7 and BZT52H-C22,115.

Q: Are all three parts compliant with automotive standards?

A: DFLZ22-7 carries no automotive qualification. BZT52H-C22,115 is qualified to AEC-Q101. NZH22C,115 is qualified to AEC-Q100. Applications requiring automotive-grade components must select either BZT52H-C22,115 or NZH22C,115.

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

A: Impedance (Zzt) affects dynamic resistance and voltage regulation under load transients. DFLZ22-7 specifies 15 Ohms maximum, while BZT52H-C22,115 specifies 25 Ohms and NZH22C,115 specifies 30 Ohms. Higher impedance results in greater voltage variation during current changes. Applications sensitive to voltage ripple or transient response require evaluation of impedance specifications.

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