MMSZ2V4T1 Equivalent & Substitute Parts

Part Overview

The MMSZ2V4T1 is a Zener diode rated at 2.4 V nominal with 500 mW power dissipation in a surface mount SOD-123 package. Manufactured by onsemi, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for new designs and ongoing production requirements. Substitute parts maintain the core electrical specifications while offering improved availability and compliance status.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	2.4	V
Tolerance	±5	%
Power - Max	500	mW
Impedance (Max)	100	Ohms
Current - Reverse Leakage @ Vr	50	µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount
Package / Case	SOD-123

Substitute Part Grouping Explanation

Substitution of the MMSZ2V4T1 is determined by the following critical parameters:

Voltage - Zener (Nom): 2.4 V
Tolerance: ±5%
Power - Max: 500 mW (or higher)
Impedance (Max): 100 Ohms (or lower)
Current - Reverse Leakage @ Vr: 50 µA @ 1 V
Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA
Operating Temperature Range: -55°C to 150°C (or wider)
Mounting Type: Surface Mount
Package / Case: SOD-123 or SOD-123F (compatible footprints)

Substitute parts are grouped into two categories:

Direct Equivalents (onsemi): Parts MMSZ2V4T1G and SZMMSZ2V4T1G maintain identical electrical specifications and are from the same manufacturer. These parts differ only in packaging format and product status.

Parametric Equivalents (onsemi Automotive Grade): Part SZMMSZ2V4T3G meets all electrical specifications and adds automotive qualification (AEC-Q101).

Similar Equivalent (NXP Semiconductors): Part BZT52H-C2V4,115 maintains the core zener voltage and tolerance but operates at reduced maximum power (375 mW vs. 500 mW) and uses a SOD-123F package variant. This part is suitable for applications where the lower power rating is acceptable.

Parameter Comparison

Parameter	MMSZ2V4T1	MMSZ2V4T1G	SZMMSZ2V4T1G	SZMMSZ2V4T3G	BZT52H-C2V4,115
Manufacturer	onsemi	onsemi	onsemi	onsemi	NXP Semiconductors
Voltage - Zener (Nom)	2.4 V	2.4 V	2.4 V	2.4 V	2.4 V
Tolerance	±5%	±5%	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW	500 mW	375 mW
Impedance (Max)	100 Ohms	100 Ohms	100 Ohms	100 Ohms	85 Ohms
Current - Reverse Leakage @ Vr	50 µA @ 1 V	50 µA @ 1 V	50 µA @ 1 V	50 µA @ 1 V	50 µA @ 1 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	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-65 to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-123	SOD-123	SOD-123	SOD-123	SOD-123F
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified
Automotive Grade	No	No	Yes (AEC-Q101)	Yes (AEC-Q101)	Yes (AEC-Q101)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications)

MMSZ2V4T1G is the primary direct substitute. This part maintains all electrical parameters of the obsolete MMSZ2V4T1 while offering active product status and ROHS3 compliance. It is available in Cut Tape and Digi-Reel packaging formats.

For High-Volume Production

SZMMSZ2V4T1G is recommended for high-volume applications. This part provides identical electrical specifications with automotive-grade qualification (AEC-Q101) and is available in Tape & Reel packaging with significantly higher inventory levels (53,300 pcs).

For Automotive Applications

SZMMSZ2V4T3G is specified for automotive designs requiring AEC-Q101 qualification. This part meets all electrical requirements and carries automotive-grade certification.

For Alternative Sourcing

BZT52H-C2V4,115 from NXP Semiconductors provides an alternative source for the 2.4 V zener specification. This part operates at 375 mW maximum power (compared to 500 mW) and uses the SOD-123F package variant. Selection of this part is appropriate only when the reduced power rating meets circuit requirements. The part carries AEC-Q101 qualification and offers extended low-temperature operation (-65°C minimum vs. -55°C).

Frequently Asked Questions (FAQ)

Q: Can MMSZ2V4T1G be used as a direct replacement for MMSZ2V4T1?

A: Yes. MMSZ2V4T1G maintains identical electrical specifications including zener voltage (2.4 V), tolerance (±5%), power rating (500 mW), impedance (100 Ohms), and operating temperature range (-55°C to 150°C). The primary differences are packaging format and active product status.

Q: What is the difference between MMSZ2V4T1G and SZMMSZ2V4T1G?

A: Both parts are electrically identical. MMSZ2V4T1G is available in Cut Tape and Digi-Reel packaging, while SZMMSZ2V4T1G is supplied in Tape & Reel format and includes automotive-grade qualification (AEC-Q101). SZMMSZ2V4T1G has higher inventory availability.

Q: Is BZT52H-C2V4,115 a suitable replacement?

A: BZT52H-C2V4,115 is a parametric equivalent for applications where the reduced power rating (375 mW vs. 500 mW) is acceptable. The part maintains the 2.4 V zener voltage, ±5% tolerance, and forward voltage specifications. The SOD-123F package is footprint-compatible with SOD-123. This part is suitable for lower-power circuit designs.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 is an automotive-grade qualification standard. Parts SZMMSZ2V4T1G, SZMMSZ2V4T3G, and BZT52H-C2V4,115 carry this certification, making them suitable for automotive applications. The obsolete MMSZ2V4T1 does not carry this qualification.

Q: Are all substitute parts RoHS compliant?

A: MMSZ2V4T1G and SZMMSZ2V4T1G are ROHS3 compliant. The original MMSZ2V4T1 is RoHS non-compliant. BZT52H-C2V4,115 RoHS status is not specified in the provided data.

Q: What packaging formats are available?

A: MMSZ2V4T1G is available in Cut Tape (CT) and Digi-Reel formats. SZMMSZ2V4T1G is supplied in Tape & Reel (TR) format. BZT52H-C2V4,115 is supplied in Bulk packaging. All parts use surface mount technology.

Q: Can SZMMSZ2V4T3G be used in non-automotive applications?

A: Yes. SZMMSZ2V4T3G meets all electrical specifications for general-purpose applications. The automotive-grade qualification and AEC-Q101 certification do not restrict its use in non-automotive designs.

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

A: MMSZ2V4T1, MMSZ2V4T1G, SZMMSZ2V4T1G, and SZMMSZ2V4T3G all operate from -55°C to 150°C. BZT52H-C2V4,115 extends the low-temperature range to -65°C, providing wider temperature coverage.

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