MMBZ5233B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMBZ5233B-TP is a 6 V, 350 mW surface mount zener diode manufactured by Micro Commercial Co, packaged in SOT-23 (TO-236-3) configuration. This component is classified as Active and maintains full RoHS3 compliance. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage circuits in electronic systems. Alternative equivalent and substitute parts may be required due to inventory availability, supply chain considerations, or specific application requirements such as extended temperature ranges or automotive qualification.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	6	V
Tolerance	±5	%
Power - Maximum	350	mW
Impedance (Maximum)	7	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 3.5 V
Voltage - Forward (Maximum) @ If	900	mV @ 10 mA
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Surface Mount
Package / Case	SOT-23-3 (TO-236-3, SC-59)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the MMBZ5233B-TP are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Upgrade Substitutes): Parts that maintain identical electrical specifications across all critical parameters including nominal zener voltage (6 V), tolerance (±5%), impedance (7 Ohms maximum), reverse leakage current (5 µA @ 3.5 V), and forward voltage (900 mV @ 10 mA). These parts are interchangeable in applications where the original MMBZ5233B-TP is specified. Direct equivalents include CMPZ5233B TR PBFREE and MMBZ5233B-7-F. These parts may offer extended operating temperature ranges (-65°C to 150°C versus -55°C to 150°C) and enhanced moisture sensitivity ratings.

Similar Parts (Functional Alternatives): Parts that share the same nominal zener voltage (6 V), tolerance (±5%), impedance (7 Ohms maximum), and reverse leakage characteristics but differ in maximum power dissipation or package configuration. These include MMBZ5233BLT1G and SZMMBZ5233BLT1G (225 mW maximum power in SOT-23-3 package) and MMBZ5233BTS-7-F (200 mW maximum power in SOT-363 array configuration). Similar parts are suitable for applications where the specified power rating of the original part exceeds actual circuit requirements.

Substitution eligibility is determined by matching the following critical parameters: nominal zener voltage, voltage tolerance, impedance, reverse leakage current, and forward voltage characteristics. Package compatibility and operating temperature range are secondary considerations dependent on application constraints.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Ir @ Vr	Vf (Max) @ If	Temp Range	Package	Status
MMBZ5233B-TP	Micro Commercial Co	6 V	±5%	350 mW	7 Ω	5 µA @ 3.5 V	900 mV @ 10 mA	-55 to 150°C	SOT-23-3	Active
CMPZ5233B TR PBFREE	Central Semiconductor Corp	6 V	±5%	350 mW	7 Ω	5 µA @ 3.5 V	900 mV @ 10 mA	-65 to 150°C	SOT-23-3	Active
MMBZ5233B-7-F	Diodes Incorporated	6 V	±5%	350 mW	7 Ω	5 µA @ 3.5 V	900 mV @ 10 mA	-65 to 150°C	SOT-23-3	Active
MMBZ5233BLT1G	onsemi	6 V	±5%	225 mW	7 Ω	5 µA @ 3.5 V	900 mV @ 10 mA	-65 to 150°C	SOT-23-3	Active
MMBZ5233BTS-7-F	Diodes Incorporated	6 V	±5%	200 mW	7 Ω	5 µA @ 3.5 V	900 mV @ 10 mA	-65 to 150°C	SOT-363	Active
SZMMBZ5233BLT1G	onsemi	6 V	±5%	225 mW	7 Ω	5 µA @ 3.5 V	900 mV @ 10 mA	-65 to 150°C	SOT-23-3	Active

Engineering Selection Recommendations

Direct Equivalent Selection: CMPZ5233B TR PBFREE and MMBZ5233B-7-F are direct electrical equivalents to the MMBZ5233B-TP. Both parts maintain 350 mW power dissipation and all critical electrical parameters. Both are RoHS3 compliant with REACH Unaffected status. MMBZ5233B-7-F offers extended lower temperature operation (-65°C versus -55°C) and is manufactured by Diodes Incorporated with Moisture Sensitivity Level 1 (Unlimited). CMPZ5233B TR PBFREE is manufactured by Central Semiconductor Corp and similarly provides extended temperature range with MSL 1 rating. Selection between these direct equivalents depends on supply chain availability and manufacturer preference.

Automotive-Grade Selection: SZMMBZ5233BLT1G is qualified to AEC-Q101 automotive standards and is suitable for applications requiring automotive-grade components. This part maintains the same electrical specifications as MMBZ5233BLT1G but with automotive qualification. Power rating is 225 mW, which is lower than the original 350 mW specification.

Lower Power Alternative Selection: MMBZ5233BLT1G and SZMMBZ5233BLT1G both provide 225 mW maximum power dissipation in SOT-23-3 package. These parts are suitable for applications where circuit power requirements do not exceed 225 mW. Both offer extended temperature range (-65°C to 150°C) and MSL 1 rating.

Array Configuration Alternative: MMBZ5233BTS-7-F is a three-independent-diode array in SOT-363 package with 200 mW per diode. This part is suitable for applications requiring multiple zener diodes in a compact footprint, provided that individual diode power dissipation does not exceed 200 mW.

All substitute parts maintain RoHS3 compliance and REACH Unaffected status consistent with the original MMBZ5233B-TP specification.

Frequently Asked Questions (FAQ)

Q: Can CMPZ5233B TR PBFREE be used as a direct replacement for MMBZ5233B-TP?

A: Yes. CMPZ5233B TR PBFREE is a direct electrical equivalent with identical nominal zener voltage (6 V), tolerance (±5%), maximum power (350 mW), impedance (7 Ohms), reverse leakage current (5 µA @ 3.5 V), and forward voltage (900 mV @ 10 mA). Both are packaged in SOT-23-3 and are RoHS3 compliant. The substitute offers extended operating temperature range (-65°C to 150°C) and MSL 1 rating.

Q: What is the difference between MMBZ5233B-7-F and MMBZ5233B-TP?

A: MMBZ5233B-7-F is manufactured by Diodes Incorporated and maintains identical electrical specifications to MMBZ5233B-TP. The primary differences are extended lower operating temperature (-65°C versus -55°C) and MSL 1 moisture sensitivity rating. Both parts are packaged in SOT-23-3 and rated for 350 mW maximum power dissipation.

Q: Can MMBZ5233BLT1G replace MMBZ5233B-TP in all applications?

A: MMBZ5233BLT1G is electrically compatible for zener voltage, tolerance, impedance, and leakage characteristics. However, maximum power dissipation is 225 mW compared to 350 mW for the original part. This part is suitable only for applications where actual power dissipation does not exceed 225 mW. Both parts use SOT-23-3 package and support extended temperature range (-65°C to 150°C).

Q: Is SZMMBZ5233BLT1G suitable for automotive applications?

A: Yes. SZMMBZ5233BLT1G is qualified to AEC-Q101 automotive standards and is suitable for automotive applications. Electrical specifications match MMBZ5233BLT1G with 6 V nominal zener voltage, ±5% tolerance, 225 mW maximum power, and SOT-23-3 package. Operating temperature range is -65°C to 150°C.

Q: What is the advantage of MMBZ5233BTS-7-F over single-diode alternatives?

A: MMBZ5233BTS-7-F integrates three independent zener diodes in a single SOT-363 package, reducing board space and component count for applications requiring multiple 6 V zener diodes. Each diode is rated for 200 mW maximum power dissipation. This configuration is suitable for multi-channel protection or reference circuits where individual diode power requirements do not exceed 200 mW.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (CMPZ5233B TR PBFREE, MMBZ5233B-7-F, MMBZ5233BLT1G, MMBZ5233BTS-7-F, and SZMMBZ5233BLT1G) are RoHS3 compliant and REACH Unaffected, consistent with the original MMBZ5233B-TP specification.

Q: What is the difference between SOT-23-3 and SOT-363 packages?

A: SOT-23-3 is a three-lead single-diode package used for MMBZ5233B-TP and most substitute parts. SOT-363 is a six-lead package used for MMBZ5233BTS-7-F, which contains three independent diodes. SOT-363 provides a more compact footprint for applications requiring multiple diodes but requires different PCB layout and routing.

Q: Can MMBZ5233BTS-7-F be used in place of MMBZ5233B-TP in existing circuit designs?

A: MMBZ5233BTS-7-F is not a direct pin-compatible replacement due to different package configuration (SOT-363 versus SOT-23-3). PCB layout and routing modifications are required. Additionally, maximum power per diode is 200 mW versus 350 mW for the original part. This part is suitable only for new designs or redesigns where the array configuration and lower power rating are acceptable.

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