MMSZ5236B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMSZ5236B-TP is a 7.5 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. Equivalent and substitute parts are identified based on matching electrical characteristics and mechanical compatibility to ensure functional interchangeability in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	7.5	V
Tolerance	±5%	—
Power - Maximum	500	mW
Impedance (Maximum)	6	Ohms
Current - Reverse Leakage @ Vr	3	µA @ 6 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

Substitution of the MMSZ5236B-TP is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 7.5 V nominal
Power dissipation: 500 mW maximum
Package type: SOD-123 surface mount
Operating temperature range: -55°C to 150°C minimum
Voltage tolerance: ±5% or tighter
RoHS3 compliance

Secondary Compatibility Factors:

Impedance (Zzt): 6 Ohms or lower preferred for circuit stability
Reverse leakage current: 3 µA @ 6 V or lower
Forward voltage: 900 mV @ 10 mA maximum

Parts are classified as Direct Substitutes when all primary matching criteria are met with identical or superior electrical performance. Parts are classified as Similar Substitutes when zener voltage and package match but power rating, tolerance, or impedance differ within acceptable application ranges.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Reverse Leakage @ Vr	Package	Temp Range (°C)	Packaging Type
MMSZ5236B-TP	Micro Commercial Co	7.5	±5%	500	6	3 µA @ 6 V	SOD-123	-55 to 150	Tape & Reel
MMSZ4693-E3-08	Vishay General Semiconductor	7.5	±5%	500	—	10 µA @ 5.7 V	SOD-123	-55 to 150	Tape & Reel
MMSZ4693-E3-18	Vishay General Semiconductor	7.5	±5%	500	—	10 µA @ 5.7 V	SOD-123	-55 to 150	Cut Tape & Digi-Reel
MMSZ4693T1G	onsemi	7.5	±5%	500	—	10 µA @ 5.7 V	SOD-123	-55 to 150	Cut Tape & Digi-Reel
MMSZ7V5T1G	onsemi	7.5	±5%	500	15	1 µA @ 5 V	SOD-123	-55 to 150	Tape & Reel
SZMMSZ4693T1G	onsemi	7.5	±5%	500	—	10 µA @ 5.7 V	SOD-123	-55 to 150	Tape & Reel
SZMMSZ7V5T1G	onsemi	7.5	±5%	500	15	1 µA @ 5 V	SOD-123	-55 to 150	Cut Tape & Digi-Reel
BZT52C7V5Q-7-F	Diodes Incorporated	7.5	±6%	370	15	1 µA @ 5 V	SOD-123	-65 to 150	Tape & Reel
BZT52C7V5S-7-F	Diodes Incorporated	7.5	±6%	200	15	700 nA @ 5 V	SOD-323	-65 to 150	Tape & Reel
DDZ7V5B-7	Diodes Incorporated	7.5	±2.5%	310	6	100 nA @ 6 V	SOD-123	-65 to 150	Tape & Reel
DDZ7V5C-7	Diodes Incorporated	7.5	±3%	500	6	100 nA @ 6 V	SOD-123	-65 to 150	Tape & Reel

Engineering Selection Recommendations

Direct Substitutes (Functionally Equivalent):

The following parts meet all primary matching criteria and are direct substitutes for the MMSZ5236B-TP:

MMSZ4693-E3-08 (Vishay): 7.5 V, 500 mW, ±5% tolerance, SOD-123, ROHS3 compliant. Available in Tape & Reel packaging.
MMSZ4693-E3-18 (Vishay): 7.5 V, 500 mW, ±5% tolerance, SOD-123, ROHS3 compliant. Available in Cut Tape & Digi-Reel packaging.
MMSZ4693T1G (onsemi): 7.5 V, 500 mW, ±5% tolerance, SOD-123, ROHS3 compliant. High inventory availability.
MMSZ7V5T1G (onsemi): 7.5 V, 500 mW, ±5% tolerance, SOD-123, ROHS3 compliant. Superior reverse leakage performance (1 µA @ 5 V).
SZMMSZ4693T1G (onsemi): 7.5 V, 500 mW, ±5% tolerance, SOD-123, ROHS3 compliant. AEC-Q101 automotive qualified.
SZMMSZ7V5T1G (onsemi): 7.5 V, 500 mW, ±5% tolerance, SOD-123, ROHS3 compliant. AEC-Q101 automotive qualified with superior reverse leakage performance.

Similar Substitutes (Conditional Application):

The following parts share the 7.5 V zener voltage and SOD-123 package but differ in power rating, tolerance, or other parameters:

BZT52C7V5Q-7-F (Diodes Incorporated): 7.5 V, 370 mW, ±6% tolerance, SOD-123, AEC-Q101 automotive qualified. Lower power rating; suitable for applications with reduced power dissipation requirements.
BZT52C7V5S-7-F (Diodes Incorporated): 7.5 V, 200 mW, SOD-323 package. Different package type; not recommended as direct substitute due to SOD-323 form factor.
DDZ7V5B-7 (Diodes Incorporated): 7.5 V, 310 mW, ±2.5% tolerance, SOD-123. Lower power rating and tighter tolerance; suitable for precision voltage reference applications.
DDZ7V5C-7 (Diodes Incorporated): 7.5 V, 500 mW, ±3% tolerance, SOD-123. Equivalent power rating with tighter tolerance and superior reverse leakage performance (100 nA @ 6 V).

All substitute parts listed are ROHS3 compliant and REACH unaffected. Selection should be based on specific application requirements including power dissipation, voltage tolerance, and packaging constraints.

Frequently Asked Questions (FAQ)

Q: Can MMSZ4693T1G replace MMSZ5236B-TP directly?

A: Yes. Both parts have identical zener voltage (7.5 V), power rating (500 mW), tolerance (±5%), and SOD-123 package. Both are ROHS3 compliant and operate across -55°C to 150°C. The primary difference is manufacturer and reverse leakage specification (10 µA @ 5.7 V versus 3 µA @ 6 V).

Q: What is the difference between MMSZ7V5T1G and MMSZ4693T1G?

A: Both are 7.5 V, 500 mW, ±5% tolerance zener diodes in SOD-123 packaging from onsemi. MMSZ7V5T1G has lower reverse leakage current (1 µA @ 5 V) and higher impedance (15 Ohms) compared to MMSZ4693T1G (10 µA @ 5.7 V). MMSZ7V5T1G is preferred for applications requiring lower leakage performance.

Q: Are automotive-qualified parts (SZMMSZ series) interchangeable with standard parts?

A: Yes. SZMMSZ4693T1G and SZMMSZ7V5T1G are AEC-Q101 qualified versions of their standard counterparts. They meet all electrical specifications of the MMSZ5236B-TP and are suitable for both automotive and general industrial applications. Automotive qualification adds process and reliability requirements but does not change functional performance.

Q: Why is BZT52C7V5S-7-F not recommended as a substitute?

A: BZT52C7V5S-7-F uses SOD-323 packaging instead of SOD-123. This different package form factor is not mechanically compatible with circuit boards designed for SOD-123 components. Additionally, the 200 mW power rating is significantly lower than the 500 mW requirement.

Q: Can DDZ7V5C-7 be used instead of MMSZ5236B-TP?

A: Yes, with consideration of tolerance differences. DDZ7V5C-7 has identical 7.5 V zener voltage, 500 mW power rating, and SOD-123 package. However, it has ±3% tolerance (tighter than ±5%) and superior reverse leakage performance (100 nA @ 6 V versus 3 µA @ 6 V). It is suitable for applications requiring higher precision voltage regulation.

Q: What packaging options are available for substitutes?

A: Substitutes are available in Tape & Reel (TR) and Cut Tape & Digi-Reel packaging. MMSZ5236B-TP is supplied in Tape & Reel. MMSZ4693-E3-18, MMSZ4693T1G, and SZMMSZ7V5T1G are available in Cut Tape & Digi-Reel. All other listed substitutes are supplied in Tape & Reel format.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant and REACH unaffected, matching the compliance status of the MMSZ5236B-TP.

Q: What is the significance of impedance (Zzt) differences?

A: Impedance affects voltage regulation stability and transient response. The MMSZ5236B-TP has 6 Ohms impedance. Substitutes with 15 Ohms impedance (MMSZ7V5T1G, SZMMSZ7V5T1G, BZT52C7V5Q-7-F) have higher impedance. For applications requiring tight voltage regulation, lower impedance is preferred. For general voltage clamping applications, higher impedance is acceptable.

Q: What is the difference between reverse leakage specifications at different voltages?

A: Reverse leakage current is measured at specific reverse voltages. MMSZ5236B-TP specifies 3 µA @ 6 V, while some substitutes specify 10 µA @ 5.7 V or 1 µA @ 5 V. Lower leakage current indicates better diode quality and is preferred for precision applications. Measurement voltage differences reflect manufacturer test conditions and do not indicate incompatibility.

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