BZT52C33S RRG Equivalent & Substitute Parts

Part Overview

The BZT52C33S RRG is a 33 V Zener diode rated for 200 mW power dissipation in a surface mount SOD-323F package. Manufactured by Taiwan Semiconductor Corporation, this component is classified as Active and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications including nominal Zener voltage, power rating, package type, and operating temperature range. Alternative sources and tolerance variants are available to support procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	33	V
Tolerance	±5%	—
Power - Max	200	mW
Impedance (Max)	80	Ohms
Current - Reverse Leakage @ Vr	45	nA @ 23 V
Voltage - Forward (Vf) (Max) @ If	1	V @ 10 mA
Operating Temperature	-65 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	SC-90, SOD-323F	—

Substitute Part Grouping Explanation

Substitution eligibility for the BZT52C33S RRG is determined by the following critical parameters:

Primary Matching Criteria:

Nominal Zener voltage: 33 V
Maximum power dissipation: 200 mW
Package type: SOD-323F (SC-90)
Mounting type: Surface Mount
Operating temperature range: -65°C to 150°C

Secondary Compatibility Factors:

Tolerance: ±5% (primary specification); ±2% tolerance variants are acceptable as tighter tolerance represents improved performance
Impedance (Max): 80 Ohms (primary); 75 Ohms is acceptable as lower impedance is within acceptable range
Reverse leakage current: 45 nA @ 23 V
Forward voltage: 1 V @ 10 mA

All identified substitute parts meet or exceed the primary matching criteria. Tolerance and impedance variations are within acceptable engineering margins for Zener diode applications.

Parameter Comparison

Parameter	BZT52C33S RRG	BZT52B33S R9G	BZT52C33S R9G	MM3Z33VC	MM3Z33VB
Manufacturer	Taiwan Semiconductor	Taiwan Semiconductor	Taiwan Semiconductor	Fairchild Semiconductor	onsemi
Voltage - Zener (Nom)	33 V	33 V	33 V	33 V	33 V
Tolerance	±5%	±2%	±5%	±5%	±2%
Power - Max	200 mW	200 mW	200 mW	200 mW	200 mW
Impedance (Max)	80 Ohms	80 Ohms	80 Ohms	75 Ohms	75 Ohms
Current - Reverse Leakage @ Vr	45 nA @ 23 V	45 nA @ 23 V	45 nA @ 23 V	45 nA @ 23 V	45 nA @ 23 V
Voltage - Forward (Vf) (Max) @ If	1 V @ 10 mA	1 V @ 10 mA	1 V @ 10 mA	1 V @ 10 mA	1 V @ 10 mA
Operating Temperature	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-323F	SOD-323F	SOD-323F	SOD-323F	SOD-323F
Product Status	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

BZT52B33S R9G (Taiwan Semiconductor) This part is a parametric equivalent with tighter tolerance specification (±2% versus ±5%). All electrical and thermal parameters are identical to the main part. ROHS3 compliance and Active product status confirm suitability for new designs. This variant is preferred when tighter voltage tolerance is required.

BZT52C33S R9G (Taiwan Semiconductor) This part is a direct equivalent with identical specifications including ±5% tolerance. Manufactured by the same supplier as the main part, it provides a direct alternative with the same electrical performance. ROHS3 compliance and Active product status confirm suitability. This variant is preferred for direct replacement applications.

MM3Z33VC (Fairchild Semiconductor) This part is a direct manufacturer equivalent with matching 33 V nominal voltage and 200 mW power rating. Impedance specification is 75 Ohms (lower than the 80 Ohm maximum of the main part), which is acceptable. All other electrical parameters match. Product Status is Active. RoHS compliance status is not specified in available data.

MM3Z33VB (onsemi) This part is a similar manufacturer equivalent with tighter tolerance specification (±2% versus ±5%). Impedance specification is 75 Ohms (lower than the 80 Ohm maximum of the main part), which is acceptable. All other electrical parameters match. ROHS3 compliance and Active product status confirm suitability. This variant is preferred when tighter voltage tolerance is required from an alternative manufacturer.

Frequently Asked Questions (FAQ)

Q: Can BZT52B33S R9G be used as a direct replacement for BZT52C33S RRG?

A: Yes. Both parts share identical nominal Zener voltage (33 V), power rating (200 mW), impedance (80 Ohms), and operating temperature range (-65°C to 150°C). The BZT52B33S R9G features tighter tolerance (±2% versus ±5%), which represents improved performance. Both are manufactured by Taiwan Semiconductor Corporation and are ROHS3 compliant.

Q: What is the difference between the tolerance specifications?

A: The main part BZT52C33S RRG has ±5% tolerance, meaning the actual Zener voltage will be between 31.35 V and 34.65 V. The BZT52B33S R9G and MM3Z33VB have ±2% tolerance, resulting in a tighter range of 32.34 V to 33.66 V. Tighter tolerance provides more precise voltage regulation but does not affect functional compatibility.

Q: Are all substitute parts available in the same package?

A: Yes. All identified substitute parts use the SOD-323F package (SC-90), which is the same surface mount package as the main part. This ensures mechanical and electrical compatibility with existing PCB layouts.

Q: Can I use MM3Z33VC or MM3Z33VB if my design requires ROHS3 compliance?

A: MM3Z33VB is confirmed ROHS3 compliant. MM3Z33VC RoHS compliance status is not specified in available data. For applications requiring documented ROHS3 compliance, MM3Z33VB is the preferred alternative from a different manufacturer.

Q: What is the significance of the impedance difference between 80 Ohms and 75 Ohms?

A: Both values are within acceptable operating parameters for Zener diodes in this voltage and power class. The 75 Ohm impedance of MM3Z33VC and MM3Z33VB represents slightly lower dynamic impedance, which is acceptable and does not create compatibility issues. The difference is negligible for typical circuit applications.

Q: Are all substitute parts currently in stock?

A: Inventory status is provided for reference: BZT52C33S RRG (608 Pcs), BZT52B33S R9G (10,879 Pcs), BZT52C33S R9G (10,944 Pcs), MM3Z33VC (15,435 Pcs), and MM3Z33VB (5,912 Pcs). Inventory levels are subject to change and should be verified at time of procurement.

Q: Can I mix different substitute parts in the same production run?

A: All substitute parts meet the same electrical specifications for nominal Zener voltage, power rating, and operating temperature. However, tolerance differences should be considered for applications requiring consistent voltage regulation. For critical applications, using a single part number throughout a production run is recommended to ensure uniform performance characteristics.

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