MMBZ5232BLT3G Equivalent & Substitute Parts

Part Overview

The MMBZ5232BLT3G is a Zener diode manufactured by onsemi, rated at 5.6 V nominal with 225 mW maximum power dissipation in a surface mount SOT-23-3 package. This component is classified as obsolete, indicating discontinuation from the original manufacturer. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this Zener diode specification.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	5.6	V
Tolerance	±5%	—
Power - Max	225	mW
Impedance (Max)	11	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 3 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the MMBZ5232BLT3G are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents maintain identical electrical specifications across all critical parameters: 5.6 V nominal Zener voltage, ±5% tolerance, 225 mW maximum power, 11 Ohms maximum impedance, 5 µA reverse leakage current at 3 V, and 900 mV forward voltage at 10 mA. These parts differ only in packaging format (Cut Tape, Tape & Reel) or product status (Active vs. Obsolete). Parametric equivalents include MMBZ5232BLT1G, SZMMBZ5232BLT1G, and SZMMBZ5232BLT3G.

Similar Parts share the same 5.6 V nominal Zener voltage and operating temperature range but differ in one or more of the following parameters: maximum power dissipation, impedance, reverse leakage current, tolerance, or manufacturer. These parts are suitable for applications where the specified electrical characteristics can accommodate the parameter variations. Similar parts include BZX84-A5V6,215, BZX84-C5V6,235, BZX84C5V6-7-F, MMBZ5232B-7-F, MMBZ5232B-TP, MMBZ5232BQ-7-F, and MMBZ5232C-TP.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Tolerance	Power Max (mW)	Zzt Max (Ohms)	Reverse Leakage (µA)	Product Status	Packaging	Grade
MMBZ5232BLT3G	onsemi	5.6	±5%	225	11	5 @ 3V	Obsolete	Tape & Reel	—
MMBZ5232BLT1G	onsemi	5.6	±5%	225	11	5 @ 3V	Active	Cut Tape & Digi-Reel	—
SZMMBZ5232BLT1G	onsemi	5.6	±5%	225	11	5 @ 3V	Active	Tape & Reel	Automotive
SZMMBZ5232BLT3G	onsemi	5.6	±5%	225	11	5 @ 3V	Active	Tape & Reel	Automotive
BZX84-A5V6,215	Nexperia USA Inc.	5.6	±1%	250	40	1 @ 2V	Active	Tape & Reel	Automotive
BZX84-C5V6,235	Nexperia USA Inc.	5.6	±5%	250	40	1 @ 2V	Active	Tape & Reel	Automotive
BZX84C5V6-7-F	Diodes Incorporated	5.6	±7%	300	40	1 @ 2V	Active	Cut Tape & Digi-Reel	—
MMBZ5232B-7-F	Diodes Incorporated	5.6	±5%	350	11	5 @ 3V	Active	Tape & Reel	—
MMBZ5232B-TP	Micro Commercial Co	5.6	±5%	350	11	5 @ 3V	Active	Tape & Reel	—
MMBZ5232BQ-7-F	Diodes Incorporated	5.6	±5%	350	11	5 @ 3V	Active	Tape & Reel	Automotive
MMBZ5232C-TP	Micro Commercial Co	5.6	±1.96%	350	11	5 @ 3V	Active	Bulk	—

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

MMBZ5232BLT1G and SZMMBZ5232BLT3G are parametric equivalents with identical electrical specifications. MMBZ5232BLT1G is available in Active status with high inventory (134,300 units). SZMMBZ5232BLT3G carries automotive-grade qualification (AEC-Q101) and is also Active status with 18,839 units in stock. Both are ROHS3 compliant. Selection between these should be based on packaging format requirements and automotive qualification necessity.

For Applications Requiring Higher Power Dissipation:

MMBZ5232B-7-F, MMBZ5232B-TP, and MMBZ5232BQ-7-F provide 350 mW maximum power (versus 225 mW), maintaining identical impedance and reverse leakage characteristics. MMBZ5232BQ-7-F includes automotive-grade qualification (AEC-Q101). These are suitable for designs with higher thermal margins or increased power requirements.

For Automotive Applications:

SZMMBZ5232BLT1G, SZMMBZ5232BLT3G, BZX84-A5V6,215, BZX84-C5V6,235, and MMBZ5232BQ-7-F all carry AEC-Q101 qualification. Selection depends on specific impedance and tolerance requirements.

For Tighter Tolerance Requirements:

BZX84-A5V6,215 offers ±1% tolerance (versus ±5%) with 250 mW power rating and AEC-Q101 qualification. MMBZ5232C-TP provides ±1.96% tolerance with 350 mW power rating.

All substitute parts listed are ROHS3 compliant, REACH unaffected, and share the same operating temperature range (-65°C to 150°C) or compatible range (-55°C to 150°C for Micro Commercial Co variants).

Frequently Asked Questions (FAQ)

Q: Can MMBZ5232BLT1G directly replace MMBZ5232BLT3G?

A: Yes. MMBZ5232BLT1G is a parametric equivalent with identical electrical specifications: 5.6 V nominal Zener voltage, ±5% tolerance, 225 mW maximum power, 11 Ohms impedance, and 5 µA reverse leakage. The difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and product status (Active versus Obsolete). Both use SOT-23-3 package.

Q: What is the difference between SZMMBZ5232BLT1G and SZMMBZ5232BLT3G?

A: Both are parametric equivalents with identical electrical specifications and automotive-grade qualification (AEC-Q101). The difference is in packaging format: SZMMBZ5232BLT1G is available in Cut Tape & Digi-Reel format, while SZMMBZ5232BLT3G is Tape & Reel. Selection depends on assembly line requirements.

Q: Can I use MMBZ5232B-7-F as a substitute?

A: MMBZ5232B-7-F is a similar part with higher power dissipation (350 mW versus 225 mW). It maintains identical impedance (11 Ohms) and reverse leakage characteristics (5 µA @ 3V). It is suitable for applications where the higher power rating provides additional thermal margin. Electrical performance in the circuit remains equivalent.

Q: What are the key differences between onsemi and Nexperia Zener diodes in this voltage range?

A: BZX84-C5V6,235 (Nexperia) differs from MMBZ5232BLT3G (onsemi) in impedance (40 Ohms versus 11 Ohms), reverse leakage (1 µA @ 2V versus 5 µA @ 3V), and power rating (250 mW versus 225 mW). Both maintain 5.6 V nominal voltage and ±5% tolerance. Nexperia parts include automotive qualification (AEC-Q101).

Q: Is MMBZ5232C-TP suitable for my application?

A: MMBZ5232C-TP offers tighter tolerance (±1.96% versus ±5%) and higher power dissipation (350 mW versus 225 mW) with identical impedance and reverse leakage. It is available in Bulk packaging only. Suitability depends on whether your application requires the tighter tolerance specification and can accommodate bulk packaging format.

Q: Do all substitute parts have the same operating temperature range?

A: Most substitute parts operate from -65°C to 150°C, matching the original MMBZ5232BLT3G. Micro Commercial Co variants (MMBZ5232B-TP and MMBZ5232C-TP) operate from -55°C to 150°C, providing a narrower low-temperature range. Verify compatibility with your application's thermal requirements.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive-grade qualification standard. Parts carrying this qualification (SZMMBZ5232BLT1G, SZMMBZ5232BLT3G, BZX84-A5V6,215, BZX84-C5V6,235, and MMBZ5232BQ-7-F) meet automotive reliability and quality requirements. Use these for automotive applications requiring formal qualification documentation.

Q: Are all listed parts ROHS3 compliant?

A: All parametric equivalent and similar parts listed are ROHS3 compliant, except MMBZ5232BLT3G (original part, status not specified). All are REACH unaffected. Verify compliance documentation with your supplier for specific procurement requirements.

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