MMBZ5230BT-7-F Equivalent & Substitute Parts

Part Overview

The MMBZ5230BT-7-F is a 4.7 V Zener diode manufactured by Diodes Incorporated, rated for 150 mW maximum power dissipation in a surface mount SOT-523 package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design requirements necessitate alternative package configurations or enhanced electrical specifications while maintaining functional compatibility within the 4.7 V Zener voltage classification.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	4.7	V
Tolerance	±5%	—
Power - Maximum	150	mW
Impedance (Maximum)	19	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 2 V
Voltage - Forward (Maximum) @ If	900	mV @ 10 mA
Operating Temperature Range	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOT-523	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the MMBZ5230BT-7-F is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage nominal value: 4.7 V (exact match required)
Mounting type: Surface Mount (all substitutes maintain this requirement)
RoHS compliance: ROHS3 Compliant (all substitutes meet this standard)
Operating temperature range: Minimum -65°C to maximum 150°C or higher
Forward voltage: 900 mV @ 10 mA (all substitutes match this specification)

Secondary Compatibility Factors:

Power rating: Minimum 150 mW (substitutes may exceed this rating)
Impedance: Maximum 80 Ohms (substitutes may differ from 19 Ohms)
Reverse leakage current: Maximum 5 µA @ 2 V (substitutes may be lower)
Package configuration: SOT-523, SOT-323, TO-236AB, or DFN1006-2 (form factor dependent on application)

All substitute parts maintain the 4.7 V Zener voltage specification and surface mount configuration, ensuring functional equivalence in voltage regulation applications.

Parameter Comparison

Parameter	MMBZ5230BT-7-F	BZX84C4V7W-7-F	BZX84-A4V7,215	BZX884-C4V7,315
Manufacturer	Diodes Incorporated	Diodes Incorporated	Nexperia USA Inc.	Nexperia USA Inc.
Voltage - Zener (Nom)	4.7 V	4.7 V	4.7 V	4.7 V
Tolerance	±5%	±6%	±1%	±5%
Power - Max	150 mW	200 mW	250 mW	250 mW
Impedance (Max)	19 Ohms	80 Ohms	80 Ohms	80 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 2 V	3 µA @ 2 V	3 µA @ 2 V	3 µA @ 2 V
Voltage - Forward (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C	-65°C ~ 125°C	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOT-523	SOT-323 (SC-70)	TO-236AB (SC-59, SOT-23-3)	DFN1006-2 (SOD-882)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

BZX84C4V7W-7-F (Diodes Incorporated)

This substitute maintains manufacturer continuity with Diodes Incorporated and provides increased power rating (200 mW versus 150 mW). The SOT-323 package offers a compact alternative to SOT-523. Operating temperature range extends to -65°C to 125°C, which covers standard industrial applications. This part is suitable for applications where the original SOT-523 footprint can be accommodated by SOT-323 layout or where higher power dissipation capability is beneficial.

BZX84-A4V7,215 (Nexperia USA Inc.)

This substitute provides the tightest voltage tolerance (±1%) and highest power rating (250 mW) among all options. The TO-236AB package (SOT-23-3) is widely used in consumer and industrial applications. Operating temperature range matches the original specification (-65°C to 150°C). This part carries AEC-Q101 automotive qualification, indicating enhanced reliability for demanding environments. Selection of this part is appropriate when superior voltage accuracy and thermal performance are required.

BZX884-C4V7,315 (Nexperia USA Inc.)

This substitute offers the smallest package footprint (DFN1006-2/SOD-882) with 250 mW power rating and full operating temperature range (-65°C to 150°C). AEC-Q100 automotive qualification is provided. This part is optimal for space-constrained applications requiring high reliability and automotive-grade performance.

All substitute parts maintain ROHS3 compliance, unlimited moisture sensitivity level (MSL 1), and Active product status, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the MMBZ5230BT-7-F be directly replaced with BZX84C4V7W-7-F?

A: Direct replacement is functionally possible for voltage regulation applications. Both parts maintain 4.7 V Zener voltage and 900 mV forward voltage specifications. The primary consideration is package footprint: SOT-523 versus SOT-323. PCB layout compatibility must be verified before substitution.

Q: What is the difference between ±5% and ±1% tolerance specifications?

A: Tolerance indicates the acceptable deviation from the nominal 4.7 V Zener voltage. The MMBZ5230BT-7-F allows ±5% deviation (4.465 V to 4.935 V), while BZX84-A4V7,215 allows ±1% deviation (4.653 V to 4.747 V). Applications requiring tighter voltage regulation benefit from the ±1% specification.

Q: Are all substitute parts suitable for automotive applications?

A: BZX84-A4V7,215 and BZX884-C4V7,315 carry automotive qualifications (AEC-Q101 and AEC-Q100 respectively). BZX84C4V7W-7-F does not list automotive qualification. Automotive application requirements must be verified against design specifications.

Q: What is the significance of the 150 mW power rating difference?

A: Power rating indicates maximum heat dissipation capability. The MMBZ5230BT-7-F is rated for 150 mW, while substitutes range from 200 mW to 250 mW. Higher power ratings provide thermal margin in applications with elevated current or ambient temperature conditions. Applications operating near the 150 mW limit benefit from higher-rated substitutes.

Q: Can package size affect circuit performance?

A: Package size does not affect electrical performance of the Zener diode itself. However, package selection impacts PCB layout, thermal dissipation characteristics, and assembly compatibility. SOT-523 is the smallest package, followed by SOT-323, DFN1006-2, and TO-236AB. Layout constraints and thermal requirements determine appropriate package selection.

Q: What is the operating temperature range significance?

A: The MMBZ5230BT-7-F operates from -65°C to 150°C. BZX84C4V7W-7-F operates to 125°C maximum. Applications in high-temperature environments (above 125°C) require the original part or BZX84-A4V7,215 and BZX884-C4V7,315, which both extend to 150°C.

Q: Are all parts RoHS3 compliant?

A: Yes, all parts listed (MMBZ5230BT-7-F, BZX84C4V7W-7-F, BZX84-A4V7,215, and BZX884-C4V7,315) are ROHS3 compliant and carry unlimited moisture sensitivity level (MSL 1), ensuring regulatory compliance and storage flexibility.

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