MMBZ5236B-TP Equivalent & Substitute Parts

Part Overview

The MMBZ5236B-TP is an active Zener diode manufactured by Micro Commercial Co, designed for voltage regulation and protection applications. This surface mount component operates at a nominal Zener voltage of 7.5 V with 350 mW maximum power dissipation in a SOT-23 package. The part is ROHS3 compliant and REACH unaffected, making it suitable for modern electronic applications requiring environmental compliance.

Substitute parts are identified based on matching critical electrical parameters: nominal Zener voltage, tolerance, impedance characteristics, reverse leakage current, forward voltage drop, and package compatibility. Alternative sources provide equivalent functional performance within the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	7.5	V
Tolerance	±5%	%
Power - Max	350	mW
Impedance (Max)	6	Ohms
Current - Reverse Leakage @ Vr	3	µA @ 6 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-55 to 150	°C
Package / Case	SOT-23-3 (TO-236)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitute parts for the MMBZ5236B-TP are qualified based on the following critical parameters:

Electrical Equivalence Criteria:

Nominal Zener voltage: 7.5 V (exact match required)
Voltage tolerance: ±5% (exact match required)
Impedance (Max): 6 Ohms (exact match required)
Reverse leakage current: 3 µA @ 6 V (exact match required)
Forward voltage drop: 900 mV @ 10 mA (exact match required)

Mechanical & Package Compatibility:

Package type: SOT-23-3 (TO-236) surface mount configuration
Mounting type: Surface mount (identical PCB footprint compatibility)

Compliance & Status:

Product status: Active
RoHS compliance: ROHS3 compliant
REACH status: REACH unaffected

The MMBZ5236BLT1G from onsemi qualifies as a direct substitute based on matching all electrical parameters and package specifications. The primary difference is maximum power dissipation (225 mW versus 350 mW), which represents a derating condition suitable for applications not requiring the full 350 mW specification.

Parameter Comparison

Parameter	MMBZ5236B-TP (Micro Commercial Co)	MMBZ5236BLT1G (onsemi)
Voltage - Zener (Nom)	7.5 V	7.5 V
Tolerance	±5%	±5%
Power - Max	350 mW	225 mW
Impedance (Max)	6 Ohms	6 Ohms
Current - Reverse Leakage @ Vr	3 µA @ 6 V	3 µA @ 6 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature Range	-55°C to 150°C	-65°C to 150°C
Package / Case	SOT-23-3 (TO-236)	SOT-23-3 (TO-236)
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Primary Part: MMBZ5236B-TP

Select the MMBZ5236B-TP when applications require the full 350 mW power dissipation specification. This part is manufactured by Micro Commercial Co and maintains active product status with ROHS3 compliance and REACH unaffected certification.

Substitute Part: MMBZ5236BLT1G

The MMBZ5236BLT1G from onsemi is functionally equivalent for applications operating within 225 mW maximum power dissipation. This substitute maintains identical electrical characteristics (7.5 V nominal, ±5% tolerance, 6 Ohms impedance, 3 µA reverse leakage, 900 mV forward voltage) and package compatibility (SOT-23-3). The extended operating temperature range (-65°C to 150°C versus -55°C to 150°C) provides additional thermal margin in low-temperature environments. Both parts carry ROHS3 compliance and REACH unaffected status, ensuring regulatory equivalence.

Selection between these parts depends on circuit power dissipation requirements. Applications with thermal constraints or lower power budgets benefit from the MMBZ5236BLT1G. Applications requiring maximum power handling capability require the MMBZ5236B-TP.

Frequently Asked Questions (FAQ)

Q: Can MMBZ5236BLT1G replace MMBZ5236B-TP in all applications?

A: The MMBZ5236BLT1G is suitable for applications where circuit power dissipation does not exceed 225 mW. If the design requires the full 350 mW specification, the MMBZ5236B-TP is required. Both parts deliver identical Zener voltage (7.5 V), tolerance (±5%), impedance (6 Ohms), and reverse leakage characteristics (3 µA @ 6 V).

Q: Are the packages physically identical?

A: Yes. Both parts use the SOT-23-3 (TO-236) surface mount package. PCB footprints are identical, and both components mount using standard surface mount assembly processes without modification.

Q: What is the difference in operating temperature range?

A: The MMBZ5236BLT1G operates from -65°C to 150°C, while the MMBZ5236B-TP operates from -55°C to 150°C. The onsemi part provides 10°C additional margin at the lower temperature extreme. Both parts maintain specified electrical characteristics across their respective operating ranges.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both MMBZ5236B-TP and MMBZ5236BLT1G are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: What determines whether a substitute is acceptable?

A: Substitution is based on matching nominal Zener voltage (7.5 V), tolerance (±5%), impedance (6 Ohms maximum), reverse leakage current (3 µA @ 6 V), forward voltage drop (900 mV @ 10 mA), and package type (SOT-23-3). Power dissipation rating is application-dependent; lower ratings are acceptable if circuit design does not exceed that limit.

Q: Can I use MMBZ5236BLT1G if my circuit dissipates 300 mW?

A: No. If circuit analysis indicates 300 mW power dissipation, the MMBZ5236B-TP (350 mW rating) is required. The MMBZ5236BLT1G (225 mW rating) would operate beyond its maximum specification and is not suitable.

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