MM5Z22VT1G Equivalent & Substitute Parts

Part Overview

The MM5Z22VT1G is a Zener Diode rated at 22 V nominal voltage with 500 mW maximum power dissipation, manufactured by onsemi in the SOD-523 surface mount package. This part is classified as obsolete, making equivalent and substitute components necessary for new designs and ongoing production requirements. The 22 V Zener voltage rating with ±5.7% tolerance and SOD-523 packaging define the primary functional parameters for substitution eligibility.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	22	V
Tolerance	±5.7%	%
Power - Max	500	mW
Impedance (Max)	55	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 15.4 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount
Package / Case	SOD-523

Substitute Part Grouping Explanation

Substitution eligibility for the MM5Z22VT1G is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 22 V nominal
Package compatibility: SOD-523 (SC-79) or equivalent surface mount packages
Operating temperature range: -65°C to 150°C minimum
Impedance (Max): 55 Ohms or lower
Reverse leakage current: 50 nA @ 15.4 V or lower

Power Rating Considerations: Substitute parts may have equal or lower maximum power ratings than the 500 mW specification. Parts with reduced power ratings (300 mW, 350 mW, 100 mW, 150 mW) are acceptable substitutes when circuit design permits lower power dissipation capability.

Tolerance Variations: Zener voltage tolerance ranges from ±2% to ±6% across substitute options. Tighter tolerances (±2%) provide improved voltage regulation accuracy compared to the original ±5.7% specification.

Package Variations: While SOD-523 remains the primary package, SOD-323 variants are included as substitutes due to compatible surface mount characteristics and electrical equivalence at the 22 V rating.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Vr Leakage	Package	Status
MM5Z22VT1G	onsemi	22 V	±5.7%	500 mW	55 Ω	50 nA @ 15.4 V	SOD-523	Obsolete
MM3Z22VT1G	onsemi	22 V	±5%	300 mW	55 Ω	50 nA @ 15.4 V	SOD-323	Active
BZT52C22T-7	Diodes Incorporated	22 V	±6%	300 mW	55 Ω	100 nA @ 15.4 V	SOD-523	Active
BZT52C22T-TP	Micro Commercial Co	22 V	±5%	100 mW	55 Ω	100 nA @ 15.4 V	SOD-523	Active
BZT585B22T-7	Diodes Incorporated	22 V	±2%	350 mW	55 Ω	50 nA @ 15.4 V	SOD-523	Active
BZX585-B22,115	Nexperia USA Inc.	22 V	±2%	300 mW	55 Ω	50 nA @ 15.4 V	SOD-523	Active
BZX585-C22,115	Nexperia USA Inc.	22 V	±5%	300 mW	55 Ω	50 nA @ 15.4 V	SOD-523	Active
BZX84J-B22,115	NXP USA Inc.	22 V	±2%	550 mW	25 Ω	50 nA @ 15.4 V	SOD-323F	Active
CZRU52C22	Comchip Technology	22 V	±5%	150 mW	55 Ω	100 nA @ 17 V	0603/SOD-523F	Active
CZRUR52C22	Comchip Technology	22 V	±5%	150 mW	55 Ω	100 nA @ 17 V	0603/SOD-523F	Active

Engineering Selection Recommendations

Direct Replacement (Same Package, Active Status): BZT52C22T-7 (Diodes Incorporated) and BZX585-C22,115 (Nexperia USA Inc.) are direct SOD-523 package replacements with active product status. Both maintain the 22 V nominal voltage and 55 Ohm impedance specification. BZX585-C22,115 carries AEC-Q100 automotive qualification, suitable for applications requiring automotive-grade components.

Higher Power Capability: BZX84J-B22,115 (NXP USA Inc.) provides 550 mW power rating in SOD-323F package with ±2% tolerance and AEC-Q101 automotive qualification. This part offers superior impedance performance (25 Ohms) and is suitable for applications requiring higher power dissipation or tighter voltage regulation.

Lower Power Applications: BZT52C22T-TP (Micro Commercial Co), CZRU52C22, and CZRUR52C22 (Comchip Technology) are suitable for circuits with reduced power requirements (100 mW to 150 mW). These parts maintain the 22 V specification and are active products with RoHS3 compliance.

Alternative Package (SOD-323): MM3Z22VT1G (onsemi) provides a 300 mW rated alternative in SOD-323 package with ±5% tolerance. This part maintains onsemi manufacturing continuity and is an active product with RoHS3 compliance.

Compliance Considerations: All substitute parts listed carry RoHS3 compliance and REACH Unaffected status. Parts designated with AEC-Q100 or AEC-Q101 qualification (BZX585-B22,115, BZX585-C22,115, BZX84J-B22,115) are suitable for automotive applications requiring formal qualification documentation.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with lower power rating than the original 500 mW specification?

A: Yes, provided the circuit design operates within the lower power dissipation limit. Verify that the maximum power dissipation in your application does not exceed the substitute part's rating. Parts rated at 300 mW, 350 mW, 150 mW, and 100 mW are acceptable substitutes when circuit conditions permit.

Q: What is the significance of the ±2% tolerance variants compared to the original ±5.7%?

A: Tighter tolerance specifications (±2%) provide improved voltage regulation accuracy and reduced variation across production batches. Parts such as BZT585B22T-7, BZX585-B22,115, and BZX84J-B22,115 offer this enhanced tolerance performance for applications requiring precise voltage reference characteristics.

Q: Are SOD-323 package parts compatible with SOD-523 footprints?

A: No. SOD-323 and SOD-523 are distinct surface mount packages with different physical dimensions and pin configurations. PCB layout and footprint design must accommodate the specific package type. MM3Z22VT1G (SOD-323) and BZX84J-B22,115 (SOD-323F) require SOD-323 compatible footprints.

Q: Which substitute parts carry automotive qualification?

A: BZX585-B22,115, BZX585-C22,115 (both AEC-Q100 qualified), and BZX84J-B22,115 (AEC-Q101 qualified) are designated for automotive applications. These parts are manufactured by Nexperia USA Inc. and NXP USA Inc. with formal automotive qualification documentation.

Q: What is the difference between impedance (Zzt) values of 55 Ohms and 25 Ohms?

A: Impedance (Zzt) represents the dynamic impedance of the Zener diode at the specified test current. Lower impedance (25 Ohms in BZX84J-B22,115) indicates superior voltage regulation performance and reduced voltage variation under load changes. Higher impedance (55 Ohms) is acceptable for general-purpose voltage regulation applications.

Q: Can I substitute CZRU52C24 (24 V) for the MM5Z22VT1G (22 V)?

A: No. CZRU52C24 is rated at 24 V nominal voltage, which differs from the required 22 V specification. Voltage substitution is not permitted. Only parts with 22 V nominal Zener voltage are acceptable substitutes.

Q: Are all listed substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance status. The original MM5Z22VT1G does not specify RoHS status, but all active substitute options meet current RoHS3 requirements.

Q: What is the operating temperature range for substitute parts?

A: Most substitute parts maintain the -65°C to 150°C operating temperature range of the original part. CZRU52C22 and CZRUR52C22 (Comchip Technology) operate within -55°C to 125°C, which is a narrower range. Verify temperature requirements for your specific application before selection.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message