MM3Z24VT1 Equivalent & Substitute Parts

Part Overview

The MM3Z24VT1 is a Zener diode rated at 24 V nominal voltage with 200 mW maximum power dissipation in a surface mount SOD-323 package. Manufactured by onsemi, this component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications. Active alternatives with identical or superior electrical characteristics are available from multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	24	V
Tolerance	±6%	-
Power - Max	200	mW
Impedance (Max)	70	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 16.8 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature Range	-65 to 150	°C
Package / Case	SC-76, SOD-323	-
Mounting Type	Surface Mount	-

Substitute Part Grouping Explanation

Substitution of the MM3Z24VT1 is determined by the following critical parameters: nominal Zener voltage (24 V), maximum power dissipation capability, impedance characteristics, reverse leakage current specifications, forward voltage drop, operating temperature range, and package form factor. Substitute parts must maintain compatibility across these electrical and mechanical specifications to ensure functional equivalence in circuit applications.

The substitute parts are grouped into the following categories:

Direct Manufacturer Upgrade: MM3Z24VT1G offers the same electrical characteristics as the main part with increased power rating (300 mW versus 200 mW) and active product status.

Parametric Equivalents: BZT52C24S-TP and BZT52C24S-7-F provide identical electrical specifications to the MM3Z24VT1 with active product status and RoHS3 compliance.

Similar Substitute: CZRF52C24 maintains the 24 V Zener voltage and 200 mW power rating with minor variations in tolerance (±5% versus ±6%), impedance (80 Ohms versus 70 Ohms), and operating temperature range (-55°C to 125°C versus -65°C to 150°C), but uses an alternative package designation (1005/SOD-323F).

Parameter Comparison

Parameter	MM3Z24VT1	MM3Z24VT1G	BZT52C24S-TP	BZT52C24S-7-F	CZRF52C24
Manufacturer	onsemi	onsemi	Micro Commercial Co	Diodes Incorporated	Comchip Technology
Voltage - Zener (Nom)	24 V	24 V	24 V	24 V	24 V
Tolerance	±6%	±6%	±6%	±6%	±5%
Power - Max	200 mW	300 mW	200 mW	200 mW	200 mW
Impedance (Max)	70 Ohms	70 Ohms	70 Ohms	70 Ohms	80 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 16.8 V	50 nA @ 16.8 V	100 nA @ 16.8 V	100 nA @ 16.8 V	100 nA @ 18 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature Range	-65 to 150 °C	-65 to 150 °C	-65 to 150 °C	-65 to 150 °C	-55 to 125 °C
Package / Case	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323	1005 (2512 Metric)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MM3Z24VT1G (onsemi): This part represents the direct manufacturer upgrade path. It maintains identical electrical specifications to the MM3Z24VT1 while offering increased power dissipation (300 mW), active product status, and RoHS3 compliance. The same SOD-323 package ensures direct PCB compatibility without layout modifications. This option is preferred for designs requiring manufacturer continuity and maximum thermal headroom.

BZT52C24S-TP (Micro Commercial Co): This parametric equivalent provides identical electrical characteristics to the MM3Z24VT1 with active product status and RoHS3 compliance. The 70 Ohm impedance and 200 mW power rating match the original specification exactly. High inventory availability (52,804 pcs) supports production requirements. SOD-323 package compatibility eliminates redesign requirements.

BZT52C24S-7-F (Diodes Incorporated): This parametric equivalent offers identical electrical specifications with active product status and RoHS3 compliance. Reverse leakage current specification (100 nA @ 16.8 V) is slightly higher than the original part but remains within acceptable circuit performance parameters. SOD-323 package ensures direct substitution capability.

CZRF52C24 (Comchip Technology): This similar substitute maintains the 24 V Zener voltage and 200 mW power rating with active product status and RoHS3 compliance. The ±5% tolerance provides tighter voltage regulation compared to the ±6% specification of the original part. The 1005/SOD-323F package designation indicates a different form factor (2512 Metric) that may require PCB layout evaluation for footprint compatibility. Operating temperature range (-55°C to 125°C) is narrower than the original specification (-65°C to 150°C), requiring thermal environment verification for applications operating at temperature extremes.

Frequently Asked Questions (FAQ)

Q: Can MM3Z24VT1G be used as a direct replacement for MM3Z24VT1?

A: Yes. MM3Z24VT1G maintains identical Zener voltage (24 V), tolerance (±6%), forward voltage drop (900 mV @ 10 mA), impedance (70 Ohms), and operating temperature range (-65°C to 150°C). The increased power rating (300 mW versus 200 mW) provides additional thermal margin. Both parts use the SOD-323 package with identical pinout and footprint.

Q: What is the difference between BZT52C24S-TP and BZT52C24S-7-F?

A: Both parts are parametric equivalents with identical Zener voltage (24 V), tolerance (±6%), power rating (200 mW), impedance (70 Ohms), and operating temperature range (-65°C to 150°C). The primary difference is manufacturer designation and packaging format. Both are functionally equivalent for circuit applications and use the SOD-323 package.

Q: Is CZRF52C24 compatible with the original MM3Z24VT1 design?

A: CZRF52C24 maintains the 24 V Zener voltage and 200 mW power rating, making it electrically compatible for most applications. However, three factors require evaluation: (1) The package designation (1005/SOD-323F) differs from the standard SOD-323, requiring PCB footprint verification; (2) The operating temperature range (-55°C to 125°C) is narrower than the original (-65°C to 150°C), necessitating thermal environment assessment; (3) The impedance is 80 Ohms versus 70 Ohms, which may affect voltage regulation characteristics in high-impedance circuit configurations.

Q: Why is the MM3Z24VT1 listed as obsolete?

A: The MM3Z24VT1 is classified as obsolete product status by onsemi. Active alternatives with equivalent or superior electrical characteristics are available from multiple manufacturers, including the direct upgrade MM3Z24VT1G from the same manufacturer.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Nominal Zener voltage (24 V); (2) Voltage tolerance (±6% or tighter); (3) Maximum power dissipation (200 mW or higher); (4) Impedance characteristics (70 Ohms or lower); (5) Reverse leakage current specifications; (6) Forward voltage drop (900 mV @ 10 mA); (7) Operating temperature range (-65°C to 150°C or wider); (8) Package form factor (SOD-323 or compatible footprint).

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed (MM3Z24VT1G, BZT52C24S-TP, BZT52C24S-7-F, and CZRF52C24) are RoHS3 compliant. The original MM3Z24VT1 is RoHS non-compliant. Substitution with any of these parts satisfies RoHS3 regulatory requirements for new designs and production.

Q: Can I use a higher power-rated part like MM3Z24VT1G in a circuit designed for 200 mW?

A: Yes. The MM3Z24VT1G with 300 mW power rating is suitable for circuits designed for 200 mW operation. The higher power rating provides additional thermal margin and does not degrade circuit performance. All other electrical parameters remain identical to the original specification.

Q: What inventory considerations apply to these substitute parts?

A: MM3Z24VT1G has 20,100 pcs in stock; BZT52C24S-TP has 52,804 pcs in stock; BZT52C24S-7-F has 20,374 pcs in stock; CZRF52C24 has 1,129 pcs in stock. All parts are available as new original components. BZT52C24S-TP offers the highest inventory availability for high-volume production requirements.

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