MMSZ5233B-7 Zener Diode Equivalent & Substitute Parts

Part Overview

The MMSZ5233B-7 is a 6 V, 500 mW Zener diode manufactured by Diodes Incorporated in SOD-123 surface mount packaging. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives within acceptable parameter tolerances for Zener diode applications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	6	V
Tolerance	±5	%
Power - Maximum	500	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	-65 to 150	°C
Mounting Type	Surface Mount
Package / Case	SOD-123

Substitute Part Grouping Explanation

Substitution of the MMSZ5233B-7 is determined by the following critical parameters:

Electrical Specifications:

Zener voltage (Vz): 6 V nominal with ±5% tolerance
Power dissipation: 500 mW maximum
Impedance: 7 Ohms maximum
Reverse leakage current: 5 µA @ 3.5 V
Forward voltage: 900 mV maximum @ 10 mA
Operating temperature range: -65°C to 150°C

Mechanical Specifications:

Package type: SOD-123 or SOD-123F (compatible variants)
Mounting: Surface mount

Parts are grouped into two categories:

Parametric Equivalents: Parts with identical electrical specifications and compatible packaging (SOD-123).

Manufacturer Recommended Substitutes: Parts with minor variations in electrical parameters (such as Zener voltage tolerance or impedance) or package variants (SOD-123F) that remain functionally compatible within the application's design margins.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Tolerance (%)	Power (mW)	Zzt (Ohms)	Leakage @ Vr (µA)	Vf Max (mV)	Temp Range (°C)	Package	Product Status
MMSZ5233B-7	Diodes Incorporated	6	±5	500	7	5 @ 3.5 V	900 @ 10 mA	-65 to 150	SOD-123	Discontinued
MMSZ5233B-7-F	Diodes Incorporated	6	±5	500	7	5 @ 3.5 V	900 @ 10 mA	-65 to 150	SOD-123	Active
MMSZ5233B-TP	Micro Commercial Co	6	±5	500	7	5 @ 3.5 V	900 @ 10 mA	-55 to 150	SOD-123	Active
MMSZ5233BT1G	onsemi	6	±5	500	7	5 @ 3.5 V	900 @ 10 mA	-55 to 150	SOD-123	Active
SZMMSZ5233BT1G	onsemi	6	±5	500	7	5 @ 3.5 V	900 @ 10 mA	-55 to 150	SOD-123	Active
CMHZ5233B TR PBFREE	Central Semiconductor Corp	6	±5	500	7	5 @ 3.5 V	900 @ 10 mA	-65 to 150	SOD-123	Active
BZT52H-C6V2,115	Nexperia USA Inc.	6.2	±5	375	10	3 @ 4 V	900 @ 10 mA	-65 to 150	SOD-123F	Active
NZH6V2B,115	Nexperia USA Inc.	6.2	±3	500	10	5 @ 3 V	900 @ 10 mA	-55 to 150	SOD-123F	Active

Engineering Selection Recommendations

Primary Selection - Parametric Equivalents:

The MMSZ5233B-7-F (Diodes Incorporated) is the direct parametric equivalent with identical electrical specifications and is currently in active product status. This part maintains full compatibility with the original MMSZ5233B-7 design.

The CMHZ5233B TR PBFREE (Central Semiconductor Corp) provides identical electrical parameters and extends the operating temperature range to -65°C, matching the original part's lower temperature limit.

Secondary Selection - Full Electrical Equivalents:

The MMSZ5233BT1G (onsemi) and SZMMSZ5233BT1G (onsemi) maintain all electrical specifications with identical Zener voltage, power rating, and impedance. The SZMMSZ5233BT1G includes automotive-grade qualification (AEC-Q101) for applications requiring automotive compliance.

The MMSZ5233B-TP (Micro Commercial Co) provides identical electrical specifications with a narrower operating temperature range (-55°C to 150°C), suitable for applications not requiring the full -65°C lower limit.

Alternative Selection - Functional Substitutes:

The BZT52H-C6V2,115 (Nexperia USA Inc.) operates at 6.2 V nominal with reduced power rating (375 mW) and is packaged in SOD-123F. This part is suitable for applications where the 0.2 V higher Zener voltage and lower power dissipation are acceptable.

The NZH6V2B,115 (Nexperia USA Inc.) operates at 6.2 V nominal with ±3% tolerance (tighter than the original ±5%) and maintains the 500 mW power rating. This part includes automotive-grade qualification (AEC-Q100) and is packaged in SOD-123F.

Compliance Considerations:

All recommended substitute parts are RoHS3 compliant and REACH unaffected. The SZMMSZ5233BT1G and NZH6V2B,115 include automotive-grade qualifications for applications requiring AEC certification.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5233B-7-F be used as a direct replacement for MMSZ5233B-7?

A: Yes. The MMSZ5233B-7-F is a parametric equivalent with identical electrical specifications (6 V, 500 mW, ±5% tolerance) and compatible SOD-123 packaging. The primary difference is product status (active versus discontinued) and packaging format (Cut Tape & Digi-Reel versus standard).

Q: What is the difference between SOD-123 and SOD-123F packaging?

A: Both are surface mount packages with identical electrical performance. SOD-123F is a variant designation used by some manufacturers. Parts in either package are mechanically and electrically compatible for standard PCB assembly processes.

Q: Can I use BZT52H-C6V2,115 in place of MMSZ5233B-7?

A: BZT52H-C6V2,115 is a functional substitute with a 6.2 V nominal Zener voltage (compared to 6 V) and reduced power rating (375 mW versus 500 mW). This part is suitable only if the application design margins accommodate the 0.2 V higher voltage and lower power dissipation.

Q: What is the significance of the automotive-grade qualifications on SZMMSZ5233BT1G and NZH6V2B,115?

A: Automotive-grade qualifications (AEC-Q101 and AEC-Q100) indicate these parts meet automotive industry reliability and testing standards. These parts are required for applications in automotive systems or other applications with equivalent reliability requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitute parts are RoHS3 compliant. The original MMSZ5233B-7 is RoHS non-compliant, making the active substitutes preferable for new designs and production requiring RoHS compliance.

Q: What is the operating temperature difference between MMSZ5233B-TP and MMSZ5233B-7?

A: MMSZ5233B-TP operates from -55°C to 150°C, while MMSZ5233B-7 operates from -65°C to 150°C. The MMSZ5233B-TP is suitable for applications not requiring operation below -55°C.

Q: How do impedance differences affect substitution?

A: Impedance (Zzt) affects the Zener diode's dynamic resistance and voltage regulation characteristics. The original part specifies 7 Ohms maximum. Substitute parts with higher impedance (such as BZT52H-C6V2,115 and NZH6V2B,115 at 10 Ohms) may exhibit slightly different voltage regulation performance and should be evaluated in the specific circuit application.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message