BZT52C4V7S-TP Equivalent & Substitute Parts

Part Overview

The BZT52C4V7S-TP is a 4.7 V Zener diode manufactured by Micro Commercial Co, rated for 200 mW maximum power dissipation in a surface mount SOD-323 package. This component is classified as Active and maintains full RoHS3 compliance with unlimited moisture sensitivity rating (MSL 1). The part is suitable for voltage regulation and protection circuits requiring precise 4.7 V reference voltage with ±6% tolerance. Equivalent and substitute parts are identified based on matching or exceeding electrical performance parameters while maintaining compatible package form factors and operating specifications.

Key Parameters

Parameter	BZT52C4V7S-TP	Unit
Voltage - Zener (Nominal)	4.7	V
Tolerance	±6%	%
Power - Maximum	200	mW
Impedance (Maximum)	80	Ohms
Current - Reverse Leakage @ Vr	3	µA @ 2 V
Voltage - Forward (Maximum) @ If	900	mV @ 10 mA
Operating Temperature Range	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SC-76, SOD-323	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the BZT52C4V7S-TP are classified into two categories based on electrical and mechanical compatibility:

Direct Substitutes (Higher Power Rating): Parts with identical 4.7 V nominal voltage, matching tolerance specifications, and equal or greater power dissipation ratings. These parts maintain the same SOD-323 package footprint and are pin-compatible. Direct substitutes include MM3Z4V7T1G and SZMM3Z4V7T1G, which provide 300 mW power ratings, exceeding the original 200 mW specification while maintaining all other critical parameters.

Similar Substitutes (Package or Parameter Variations): Parts with matching 4.7 V nominal voltage and compatible operating temperature ranges but with variations in power rating, tolerance, package variant (SOD-323F), or impedance characteristics. These parts are functionally equivalent for voltage regulation applications but may require circuit layout verification due to package differences or enhanced performance characteristics.

Key Parameters Determining Substitution:

Voltage - Zener (Nominal): Must equal 4.7 V
Operating Temperature Range: Must cover -65°C to 150°C minimum
Mounting Type: Surface Mount required
Package Compatibility: SOD-323 or SOD-323F variants acceptable
RoHS3 Compliance: Required for environmental standards
Power Rating: Equal or greater than 200 mW acceptable

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance (%)	Power (mW)	Zzt (Ohms)	Package	Status
BZT52C4V7S-TP	Micro Commercial Co	4.7	±6	200	80	SOD-323	Active
MM3Z4V7T1G	onsemi	4.7	±6	300	80	SOD-323	Active
SZMM3Z4V7T1G	onsemi	4.7	±5	300	80	SOD-323	Active
BZT52C4V7SQ-7-F	Diodes Incorporated	4.7	±6.38	200	80	SOD-323	Active
BZX84J-B4V7,115	Nexperia USA Inc.	4.7	±2	550	80	SOD-323F	Active
BZX84J-C4V7,115	Nexperia USA Inc.	4.7	±5	550	80	SOD-323F	Active
DDZ4V7BSF-7	Diodes Incorporated	4.68	±3	500	130	SOD-323F	Discontinued
MM3Z4V7B	onsemi	4.7	±2	200	75	SOD-323F	Active
MM3Z4V7C	Fairchild Semiconductor	4.7	±5	200	75	SOD-323F	Active
MM3Z4V7ST1G	onsemi	4.7	±2	300	80	SOD-323	Active
MMSZ5230BS-7-F	Diodes Incorporated	4.7	±5	200	19	SOD-323	Active

Engineering Selection Recommendations

Direct Replacement (Preferred): MM3Z4V7T1G and MM3Z4V7ST1G are recommended as primary direct substitutes. Both parts maintain identical 4.7 V nominal voltage, matching impedance (80 Ohms), and equivalent operating temperature range. These parts provide increased power dissipation (300 mW versus 200 mW), enabling operation in higher thermal environments without performance degradation. Both are Active status with full RoHS3 compliance and unlimited MSL rating.

Enhanced Tolerance Alternative: SZMM3Z4V7T1G offers improved voltage tolerance (±5% versus ±6%) with automotive-grade qualification (AEC-Q101) and 300 mW power rating. This part is suitable for applications requiring tighter voltage regulation specifications and automotive environmental conditions. Highest inventory availability (1,376,400 units) ensures supply continuity.

Higher Power Applications: BZX84J-C4V7,115 provides 550 mW power dissipation with ±5% tolerance in SOD-323F package variant. This part accommodates circuits with elevated power dissipation requirements while maintaining 4.7 V regulation. Automotive qualification (AEC-Q101) supports automotive applications.

Equivalent Performance (Same Power Rating): BZT52C4V7SQ-7-F and MMSZ5230BS-7-F maintain 200 mW power rating matching the original specification. BZT52C4V7SQ-7-F includes automotive qualification (AEC-Q101). MMSZ5230BS-7-F features significantly lower impedance (19 Ohms versus 80 Ohms), suitable for applications requiring lower dynamic impedance characteristics.

Parts to Avoid: DDZ4V7BSF-7 is discontinued at DiGi Electronics and carries nominal voltage of 4.68 V (outside standard 4.7 V specification), making it unsuitable for direct replacement.

Frequently Asked Questions (FAQ)

Q: Can MM3Z4V7T1G directly replace BZT52C4V7S-TP without circuit modification?

A: Yes. MM3Z4V7T1G is a direct pin-compatible substitute with identical 4.7 V nominal voltage, matching impedance (80 Ohms), and equivalent operating temperature range (-65°C to 150°C). The increased power rating (300 mW versus 200 mW) provides enhanced thermal margin without affecting circuit operation. Both parts use SOD-323 package with identical footprint.

Q: What is the difference between SOD-323 and SOD-323F packages?

A: SOD-323 (SC-76) and SOD-323F (SC-90) are both surface mount packages for small signal diodes with identical electrical performance but different physical dimensions. SOD-323F is slightly larger. Parts specified in SOD-323F package (such as BZX84J-C4V7,115 and MM3Z4V7B) require verification of PCB layout compatibility before substitution. Footprint differences may prevent direct board-level replacement without layout modification.

Q: Is SZMM3Z4V7T1G suitable for automotive applications?

A: Yes. SZMM3Z4V7T1G carries automotive-grade qualification (AEC-Q101) and is rated for automotive environmental conditions. This part is appropriate for automotive circuit designs requiring 4.7 V regulation with improved tolerance (±5%) and 300 mW power dissipation. Standard industrial applications do not require automotive qualification.

Q: Why does MMSZ5230BS-7-F have significantly lower impedance (19 Ohms versus 80 Ohms)?

A: Impedance variation reflects different internal diode construction and doping profiles. Lower impedance (19 Ohms) provides reduced dynamic impedance, resulting in better voltage regulation under varying load conditions. This characteristic is beneficial for applications requiring superior transient response. Circuit performance impact depends on specific application requirements; verification is necessary for critical applications.

Q: Can BZX84J-C4V7,115 be used in place of BZT52C4V7S-TP?

A: BZX84J-C4V7,115 is functionally compatible with matching 4.7 V nominal voltage and ±5% tolerance. However, this part differs in three aspects: (1) higher power rating (550 mW versus 200 mW), (2) SOD-323F package variant requiring PCB layout verification, and (3) higher forward voltage (1.1 V @ 100 mA versus 900 mV @ 10 mA). Use this part only when higher power dissipation is required and package compatibility is confirmed.

Q: What does RoHS3 compliance indicate?

A: RoHS3 compliance certifies that the component meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All listed substitute parts maintain RoHS3 compliance, ensuring environmental and regulatory compatibility with the original BZT52C4V7S-TP specification.

Q: Is tolerance specification critical for voltage regulation applications?

A: Tolerance specification determines the voltage regulation accuracy. BZT52C4V7S-TP specifies ±6% tolerance, resulting in 4.42 V to 4.98 V operating range. Substitutes with tighter tolerance (such as SZMM3Z4V7T1G at ±5%) provide improved regulation accuracy. Substitutes with wider tolerance (such as BZT52C4V7SQ-7-F at ±6.38%) remain within acceptable range for most applications. Circuit design must account for specified tolerance range.

Q: What inventory considerations apply to substitute selection?

A: MM3Z4V7T1G provides 125,300 units in stock, while SZMM3Z4V7T1G offers significantly higher availability (1,376,400 units). Higher inventory availability reduces lead time risk and supports production continuity. BZT52C4V7S-TP maintains 3,809 units in stock. For long-term supply assurance, SZMM3Z4V7T1G is recommended despite automotive-grade specification not being required for standard industrial applications.

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