BZX585-B22,115 Equivalent & Substitute Parts

Part Overview

The BZX585-B22,115 is a 22 V, 300 mW Zener diode manufactured by Nexperia USA Inc. in SOD-523 surface mount packaging. This component is classified as Active product status and carries AEC-Q100 automotive qualification with ROHS3 compliance. Equivalent and substitute parts are identified based on matching nominal Zener voltage, power dissipation capability, package compatibility, and operating temperature range. Alternative components may be required due to inventory availability, lead time constraints, or specific application requirements within the allowed electrical and mechanical parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	22	V
Tolerance	±2%	-
Power - Max	300	mW
Impedance (Max)	55	Ohms
Current - Reverse Leakage @ Vr	50 nA @ 15.4 V	-
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 100 mA	-
Operating Temperature	-65°C ~ 150°C	-
Package / Case	SOD-523	-
Mounting Type	Surface Mount	-
Grade	Automotive	-
Qualification	AEC-Q100	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the BZX585-B22,115 is determined by the following critical parameters:

Primary Matching Criteria:

Nominal Zener voltage of 22 V
Surface mount technology with compatible package footprint
Operating temperature range of -65°C to 150°C
ROHS3 compliance and automotive-grade qualification where applicable
Power dissipation capability of 300 mW or greater

Secondary Compatibility Factors:

Zener voltage tolerance (±2% to ±6% acceptable)
Impedance maximum rating (51 to 100 Ohms)
Reverse leakage current specifications
Forward voltage characteristics

Substitute parts are grouped into two categories: Direct SOD-523 Package Equivalents (BZT52C22T-7, BZT52C22T-TP, BZX584C22_R1_00001, NZ9F22VT5G) and Alternative Package Equivalents (EDZVFHT2R22B in EMD2, MM3Z22VB and MM3Z22VC in SOD-323F). All listed substitutes maintain the 22 V nominal Zener voltage and surface mount configuration required for functional compatibility.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Impedance Max	Reverse Leakage @ Vr	Operating Temp	Package	Grade	Qualification
BZX585-B22,115	Nexperia USA Inc.	22 V	±2%	300 mW	55 Ohms	50 nA @ 15.4 V	-65°C ~ 150°C	SOD-523	Automotive	AEC-Q100
BZT52C22T-7	Diodes Incorporated	22 V	±6%	300 mW	55 Ohms	100 nA @ 15.4 V	-65°C ~ 150°C	SOD-523	-	-
BZT52C22T-TP	Micro Commercial Co	22 V	±5%	100 mW	55 Ohms	100 nA @ 15.4 V	-65°C ~ 150°C	SOD-523	-	-
BZX584C22_R1_00001	Panjit International Inc.	22 V	±5%	200 mW	55 Ohms	100 nA @ 15.4 V	-55°C ~ 150°C	SOD-523	-	-
EDZVFHT2R22B	Rohm Semiconductor	22 V	±2.11%	150 mW	100 Ohms	100 nA @ 17 V	-65°C ~ 150°C	EMD2	Automotive	AEC-Q101
MM3Z22VB	onsemi	22 V	±2%	200 mW	51 Ohms	45 nA @ 15.4 V	-65°C ~ 150°C	SOD-323F	-	-
MM3Z22VC	Fairchild Semiconductor	22 V	±5%	200 mW	51 Ohms	45 nA @ 15.4 V	-65°C ~ 150°C	SOD-323F	-	-
NZ9F22VT5G	onsemi	22 V	±5%	250 mW	55 Ohms	100 nA @ 16.8 V	-65°C ~ 150°C	SOD-923	-	-

Engineering Selection Recommendations

Direct Substitutes (SOD-523 Package):

BZT52C22T-7 (Diodes Incorporated) is a direct footprint equivalent with matching 300 mW power rating and SOD-523 package. This part maintains the same operating temperature range and impedance specification. The tolerance widens to ±6% compared to the original ±2%, and reverse leakage increases to 100 nA. This part is suitable for applications where the tighter tolerance of the original is not critical.

BZT52C22T-TP (Micro Commercial Co) provides SOD-523 package compatibility but with reduced power rating of 100 mW. This substitute is applicable only in circuits where power dissipation does not exceed 100 mW. The operating temperature range and impedance match the original specification.

BZX584C22_R1_00001 (Panjit International Inc.) offers SOD-523 package compatibility with 200 mW power rating. The operating temperature minimum is -55°C, which is 10°C higher than the original specification. This part is suitable for applications not requiring the full -65°C lower temperature limit.

NZ9F22VT5G (onsemi) maintains 250 mW power capability in SOD-923 package. This part is compatible with the original operating temperature range but requires PCB layout adjustment due to different package footprint.

Alternative Package Substitutes:

EDZVFHT2R22B (Rohm Semiconductor) is an automotive-grade part with AEC-Q101 qualification in EMD2 package. Power rating is 150 mW with ±2.11% tolerance. This part requires PCB redesign for the different package footprint but maintains automotive qualification.

MM3Z22VB (onsemi) and MM3Z22VC (Fairchild Semiconductor) are SOD-323F package alternatives with 200 mW power rating. Both maintain the -65°C to 150°C operating range. MM3Z22VB offers ±2% tolerance matching the original, while MM3Z22VC provides ±5% tolerance. These parts require PCB layout modification due to different package geometry.

Compliance Status:

All substitute parts maintain ROHS3 compliance and EAR99 export classification. Parts with automotive qualification (EDZVFHT2R22B with AEC-Q101) are suitable for automotive applications requiring formal qualification documentation.

Frequently Asked Questions (FAQ)

Q: Can BZT52C22T-7 replace BZX585-B22,115 in all applications?

A: BZT52C22T-7 is a direct SOD-523 package equivalent with matching 300 mW power rating and operating temperature range. The primary difference is the widened tolerance specification (±6% versus ±2%). Substitution is valid for applications where the tighter tolerance of the original is not a circuit requirement.

Q: What is the impact of using BZT52C22T-TP with 100 mW power rating instead of 300 mW?

A: BZT52C22T-TP is suitable only for circuits where the Zener diode dissipates 100 mW or less. If the application requires higher power dissipation capability, this part will exceed its maximum power rating and may fail. Verify circuit power requirements before substitution.

Q: Are MM3Z22VB and MM3Z22VC direct drop-in replacements?

A: MM3Z22VB and MM3Z22VC use SOD-323F package instead of SOD-523, requiring PCB layout modification. The footprints are not compatible without redesign. Both parts maintain the 22 V nominal voltage and -65°C to 150°C operating range. MM3Z22VB matches the original ±2% tolerance, while MM3Z22VC has ±5% tolerance.

Q: What is the difference between AEC-Q100 and AEC-Q101 qualifications?

A: AEC-Q100 applies to discrete semiconductors including Zener diodes. AEC-Q101 applies to optoelectronic devices. EDZVFHT2R22B carries AEC-Q101 qualification. For automotive applications requiring AEC-Q100 qualification specifically, the original BZX585-B22,115 is the appropriate choice.

Q: Can NZ9F22VT5G be used in place of BZX585-B22,115?

A: NZ9F22VT5G maintains the 22 V nominal voltage and -65°C to 150°C operating range with 250 mW power capability. However, the SOD-923 package footprint differs from SOD-523, requiring PCB redesign. Electrical performance is compatible, but physical layout modification is necessary.

Q: Why does BZX584C22_R1_00001 have a higher minimum operating temperature?

A: BZX584C22_R1_00001 specifies -55°C minimum operating temperature compared to -65°C for the original. This 10°C difference reflects the device's design specifications. Substitution is valid only for applications where the circuit operates above -55°C.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts maintain ROHS3 compliance status, matching the original BZX585-B22,115 environmental compliance requirement.

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