MMSZ5262B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMSZ5262B-TP is a 51 V, 500 mW surface mount zener diode manufactured by Micro Commercial Co in SOD-123 packaging. This component is classified as an active product and is ROHS3 compliant. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage circuits. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, supply chain continuity, or inventory optimization.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	51	V
Tolerance	±5	%
Power - Maximum	500	mW
Impedance (Maximum)	125	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 39 V
Voltage - Forward (Maximum) @ If	900	mV @ 10 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount
Package / Case	SOD-123
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MMSZ5262B-TP are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters:

Electrical Parameters:

Zener voltage: 51 V nominal
Tolerance: ±5%
Maximum power dissipation: 500 mW
Maximum impedance: 125 Ohms
Reverse leakage current: 100 nA @ 39 V
Forward voltage: 900 mV @ 10 mA
Operating temperature range: -55°C to 150°C

Mechanical Parameters:

Package type: SOD-123 surface mount
Mounting type: Surface mount
Moisture sensitivity level: 1 (Unlimited)

Compliance Parameters:

RoHS3 compliance
REACH unaffected status
ECCN: EAR99
HTSUS: 8541.10.0050

All substitute parts listed match these parameters exactly. The SZMMSZ5262BT1G variant includes additional automotive qualification (AEC-Q101) and automotive-grade designation, making it suitable for applications requiring automotive-level reliability.

Parameter Comparison

Parameter	MMSZ5262B-TP (Micro Commercial Co)	MMSZ5262B-E3-08 (Vishay)	MMSZ5262BT1G (onsemi)	SZMMSZ5262BT1G (onsemi)
Voltage - Zener (Nom)	51 V	51 V	51 V	51 V
Tolerance	±5%	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	125 Ohms	125 Ohms	125 Ohms	125 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 39 V	100 nA @ 39 V	100 nA @ 39 V	100 nA @ 39 V
Voltage - Forward (Max) @ If	900 mV @ 10 mA	Not specified	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-123	SOD-123	SOD-123	SOD-123
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Grade	Standard	Standard	Standard	Automotive
Qualification	Not specified	Not specified	Not specified	AEC-Q101

Engineering Selection Recommendations

MMSZ5262B-E3-08 (Vishay General Semiconductor - Diodes Division)

This substitute is a parametric equivalent with identical electrical specifications and SOD-123 packaging. It is ROHS3 compliant and carries active product status. Selection of this part is appropriate for applications requiring standard industrial-grade zener diode performance with high inventory availability (15,780 pcs).

MMSZ5262BT1G (onsemi)

This substitute is a parametric equivalent with identical electrical specifications and SOD-123 packaging. It is ROHS3 compliant and carries active product status. The part belongs to the MMSZ52xxxT1G series. Selection of this part is appropriate for applications requiring standard industrial-grade zener diode performance with moderate inventory availability (6,200 pcs).

SZMMSZ5262BT1G (onsemi)

This substitute is a parametric equivalent with identical electrical specifications and SOD-123 packaging. It is ROHS3 compliant and carries active product status. This part includes automotive-grade designation and AEC-Q101 qualification, making it suitable for automotive applications requiring enhanced reliability standards. Selection of this part is appropriate for automotive-grade designs or applications requiring AEC-Q101 compliance with high inventory availability (32,100 pcs).

Frequently Asked Questions (FAQ)

Q: Can MMSZ5262B-E3-08 be used as a direct replacement for MMSZ5262B-TP?

A: Yes. Both parts share identical zener voltage (51 V), tolerance (±5%), power rating (500 mW), impedance (125 Ohms), reverse leakage current (100 nA @ 39 V), operating temperature range (-55°C to 150°C), and SOD-123 packaging. Both are ROHS3 compliant with MSL 1 rating.

Q: What is the difference between MMSZ5262BT1G and SZMMSZ5262BT1G?

A: Both parts are parametrically identical in electrical specifications and packaging. The SZMMSZ5262BT1G includes automotive-grade designation and AEC-Q101 qualification, making it suitable for automotive applications. The MMSZ5262BT1G is standard industrial grade.

Q: Are all substitute parts in SOD-123 packaging?

A: Yes. All substitute parts listed use SOD-123 surface mount packaging, identical to the MMSZ5262B-TP.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: Which substitute part has the highest inventory availability?

A: The SZMMSZ5262BT1G has the highest inventory availability at 32,100 pcs in stock.

Q: Can SZMMSZ5262BT1G be used in non-automotive applications?

A: Yes. The SZMMSZ5262BT1G meets all parametric requirements for standard industrial applications. Its automotive qualification and AEC-Q101 certification represent additional compliance capabilities that do not restrict its use in non-automotive designs.

Q: Are forward voltage specifications identical across all parts?

A: The MMSZ5262B-TP, MMSZ5262BT1G, and SZMMSZ5262BT1G all specify 900 mV @ 10 mA forward voltage. The MMSZ5262B-E3-08 does not include forward voltage specification in the provided data.

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

A: All substitute parts operate across the temperature range of -55°C to 150°C, identical to the MMSZ5262B-TP.

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