MMSZ5233C-TP Equivalent & Substitute Parts

Part Overview

The MMSZ5233C-TP is a 6 V, 500 mW Zener diode manufactured by Micro Commercial Co, designed for surface mount applications in the SOD-123 package. This component operates across a temperature range of -55°C to 150°C and features a ±2% tolerance on the nominal Zener voltage. The part is currently in active production status with 1030 units in stock.

Equivalent and substitute parts are identified when component availability changes, supply chain disruptions occur, or design flexibility is required for manufacturing optimization. Substitute Zener diodes must maintain electrical compatibility within the specified voltage, power dissipation, and impedance parameters while conforming to the same physical package standard.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	6	V
Tolerance	±2%	—
Power - Max	500	mW
Impedance (Max)	7	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 3.5 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOD-123	—

Substitute Part Grouping Explanation

Substitution of the MMSZ5233C-TP is determined by the following critical parameters:

Primary Matching Criteria:

Nominal Zener voltage: 6 V
Maximum power dissipation: 500 mW
Package type: SOD-123 surface mount
Maximum impedance: 7 Ohms
Forward voltage: 900 mV @ 10 mA
Reverse leakage current: 5 µA @ 3.5 V

Tolerance Consideration: The MMSZ5233C-TP specifies ±2% tolerance on Zener voltage. Substitute parts with ±5% tolerance remain functionally compatible in applications where the tighter tolerance is not a circuit-critical requirement. The nominal voltage remains 6 V across all qualified substitutes.

Temperature Range: The MMSZ5233C-TP operates from -55°C to 150°C. Substitute parts must support this range or a superset thereof to ensure thermal compatibility.

Packaging Format: All substitute parts maintain the SOD-123 package specification, ensuring mechanical and thermal compatibility with existing PCB layouts and assembly processes.

Parameter Comparison

Parameter	MMSZ5233C-TP (Micro Commercial Co)	CMHZ5233B TR PBFREE (Central Semiconductor)	MMSZ5233BT1G (onsemi)	SZMMSZ5233BT1G (onsemi)	SZMMSZ5234BT1G (onsemi)	SZMMSZ5235BT1G (onsemi)
Voltage - Zener (Nom)	6 V	6 V	6 V	6 V	6.2 V	6.8 V
Tolerance	±2%	±5%	±5%	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	7 Ohms	7 Ohms	7 Ohms	7 Ohms	7 Ohms	5 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 3.5 V	5 µA @ 3.5 V	5 µA @ 3.5 V	5 µA @ 3.5 V	5 µA @ 4 V	3 µA @ 5 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	900 mV @ 10 mA
Operating Temperature	-55 to 150°C	-65 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C	-55 to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-123	SOD-123	SOD-123	SOD-123	SOD-123	SOD-123
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	Not specified	Not specified	Not specified	AEC-Q101	AEC-Q101	AEC-Q101

Engineering Selection Recommendations

Direct Substitutes (6 V Nominal Zener Voltage):

The CMHZ5233B TR PBFREE, MMSZ5233BT1G, and SZMMSZ5233BT1G are direct electrical equivalents to the MMSZ5233C-TP, maintaining the 6 V nominal Zener voltage and 500 mW power rating. These parts are suitable for applications where the ±2% tolerance specification of the original part can be relaxed to ±5%. All three parts are in active production status with substantial inventory availability.

The SZMMSZ5233BT1G offers additional value through AEC-Q101 automotive qualification, making it suitable for automotive and high-reliability applications. The CMHZ5233B TR PBFREE provides an extended lower operating temperature limit of -65°C, beneficial for extreme cold-weather applications.

Alternative Voltage Selections (Non-Direct Substitutes):

The SZMMSZ5234BT1G (6.2 V) and SZMMSZ5235BT1G (6.8 V) are not direct substitutes due to differing nominal Zener voltages. These parts are selected only when circuit design permits operation at higher voltage levels. Both parts maintain the 500 mW power rating and SOD-123 package, with AEC-Q101 automotive qualification. The SZMMSZ5235BT1G exhibits superior impedance characteristics (5 Ohms maximum) and lower reverse leakage current (3 µA @ 5 V), providing enhanced performance in precision voltage regulation applications.

Compliance and Certification:

All onsemi substitute parts (MMSZ5233BT1G, SZMMSZ5233BT1G, SZMMSZ5234BT1G, SZMMSZ5235BT1G) carry ROHS3 compliance certification. The CMHZ5233B TR PBFREE from Central Semiconductor also meets ROHS3 requirements. The SZMMSZ series parts include AEC-Q101 automotive qualification, appropriate for applications requiring automotive-grade reliability standards.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5233BT1G replace MMSZ5233C-TP directly?

A: Yes. Both parts maintain 6 V nominal Zener voltage, 500 mW power dissipation, and SOD-123 package specifications. The primary difference is tolerance: MMSZ5233BT1G specifies ±5% versus the ±2% of MMSZ5233C-TP. Direct substitution is valid for applications where ±5% tolerance is acceptable.

Q: What is the difference between SZMMSZ5233BT1G and MMSZ5233BT1G?

A: Both parts share identical electrical specifications (6 V, 500 mW, ±5% tolerance, SOD-123 package). The SZMMSZ5233BT1G carries AEC-Q101 automotive qualification and is designated for automotive-grade applications. Selection depends on whether automotive qualification is required for the end application.

Q: Can SZMMSZ5234BT1G or SZMMSZ5235BT1G be used as substitutes?

A: These parts are not direct substitutes due to different nominal Zener voltages (6.2 V and 6.8 V respectively). They are selected only when circuit design specifications permit operation at these higher voltage levels. Verify circuit voltage requirements before selection.

Q: What packaging formats are available for these substitutes?

A: MMSZ5233C-TP is supplied in Bulk packaging. Substitute parts are available in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats. Verify packaging compatibility with assembly equipment and procurement requirements before ordering.

Q: Are all substitute parts RoHS compliant?

A: All onsemi and Central Semiconductor substitute parts listed are ROHS3 compliant. The original MMSZ5233C-TP does not specify RoHS status in the provided data. Confirm RoHS compliance requirements with your procurement or quality department.

Q: Which substitute offers the best performance for precision voltage regulation?

A: The SZMMSZ5235BT1G provides superior impedance characteristics (5 Ohms maximum versus 7 Ohms) and lower reverse leakage current (3 µA @ 5 V versus 5 µA @ 3.5 V). However, this part operates at 6.8 V nominal voltage and is suitable only for applications designed for this voltage level.

Q: What is the inventory status of substitute parts?

A: SZMMSZ5235BT1G has the highest inventory (155,100 units), followed by MMSZ5233BT1G (47,100 units) and SZMMSZ5234BT1G (34,021 units). SZMMSZ5233BT1G has 30,300 units available, and CMHZ5233B TR PBFREE has 9,088 units in stock. Verify current availability with your supplier before finalizing procurement decisions.

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