BZT52C20S RRG Equivalent & Substitute Parts

Part Overview

The BZT52C20S RRG is a 20 V Zener diode manufactured by Taiwan Semiconductor Corporation, rated for 200 mW power dissipation in a surface mount SOD-323F package. This component is classified as Active and is ROHS3 compliant. The part operates across a temperature range of -65°C to 150°C and features ±5% voltage tolerance with a maximum impedance of 55 Ohms.

Equivalent and substitute parts are identified to address inventory availability, packaging format requirements, tolerance specifications, or alternative manufacturer sourcing while maintaining electrical and mechanical compatibility within the specified parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	20	V
Tolerance	±5%	—
Power - Maximum	200	mW
Impedance (Maximum)	55	Ohms
Current - Reverse Leakage @ Vr	45	nA @ 14 V
Voltage - Forward (Maximum) @ If	1	V @ 10 mA
Operating Temperature Range	-65 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	SC-90, SOD-323F	—

Substitute Part Grouping Explanation

Substitute parts for the BZT52C20S RRG are grouped based on electrical parameter compatibility and mechanical interchangeability. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - Zener (Nominal): 20 V (exact match required)
Power - Maximum: 200 mW (exact match required)
Package / Case: SOD-323F (exact match required)
Mounting Type: Surface Mount (exact match required)

Secondary Parameters Allowing Variation:

Tolerance: ±2% to ±5% (tighter tolerance acceptable)
Impedance (Maximum): 51 to 85 Ohms (within operational limits)
Current - Reverse Leakage: 45 to 100 nA (within acceptable range)
Operating Temperature Range: -55°C to 150°C minimum (BZT52C20S RRG operates -65°C to 150°C)

Substitute parts are classified as Parametric Equivalent, Direct Manufacturer, or Similar based on the degree of parameter alignment with the main part.

Parameter Comparison

Parameter	BZT52C20S RRG	BZT52B20S R9G	BZT52C20S R9G	MM3Z20VC	MM3Z20VB	UDZSTE-1720B
Manufacturer	Taiwan Semiconductor	Taiwan Semiconductor	Taiwan Semiconductor	Fairchild Semiconductor	onsemi	Rohm Semiconductor
Voltage - Zener (Nom)	20 V	20 V	20 V	20 V	20 V	20 V
Tolerance	±5%	±2%	±5%	±5%	±2%	±2%
Power - Max	200 mW	200 mW	200 mW	200 mW	200 mW	200 mW
Impedance (Max)	55 Ohms	55 Ohms	55 Ohms	51 Ohms	51 Ohms	85 Ohms
Current - Reverse Leakage @ Vr	45 nA @ 14 V	45 nA @ 14 V	45 nA @ 14 V	45 nA @ 14 V	45 nA @ 14 V	100 nA @ 15 V
Voltage - Forward (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	-55 to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-323F	SOD-323F	SOD-323F	SOD-323F	SOD-323F	SOD-323F
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	—	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

BZT52B20S R9G (Parametric Equivalent)

This part is a direct parametric equivalent with tighter tolerance specification (±2% versus ±5%). Electrical characteristics are identical to the main part. Both are manufactured by Taiwan Semiconductor Corporation and share identical impedance, leakage current, and temperature range specifications. This part is ROHS3 compliant and carries MSL 1 rating. Packaging format differs (Cut Tape & Digi-Reel® versus Tape & Reel), which may affect procurement and assembly workflows.

BZT52C20S R9G (Parametric Equivalent)

This part maintains identical electrical specifications to the BZT52C20S RRG, including ±5% tolerance, 55 Ohm impedance, and 45 nA reverse leakage current. Both are manufactured by Taiwan Semiconductor Corporation with identical operating temperature range and ROHS3 compliance. The primary difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). This part is suitable for direct substitution where packaging format is compatible with assembly requirements.

MM3Z20VC (Direct Manufacturer Equivalent)

This Fairchild Semiconductor part meets all critical electrical parameters: 20 V nominal voltage, 200 mW power rating, and SOD-323F package. Impedance specification is 51 Ohms, which is within acceptable operational limits. Reverse leakage current matches at 45 nA @ 14 V. Operating temperature range is -65°C to 150°C. Packaging format is Bulk. ECCN and HTSUS classifications match the main part.

MM3Z20VB (Similar Equivalent)

This onsemi part provides 20 V nominal voltage and 200 mW power dissipation in SOD-323F package with tighter ±2% tolerance. Impedance is specified at 51 Ohms. Reverse leakage current is 45 nA @ 14 V. Operating temperature range is -65°C to 150°C. The part is ROHS3 compliant with MSL 1 rating. Packaging is Tape & Reel format.

UDZSTE-1720B (Similar Equivalent)

This Rohm Semiconductor part meets the 20 V nominal voltage and 200 mW power requirements in SOD-323F package with ±2% tolerance. Impedance specification is 85 Ohms, which exceeds the main part specification but remains within acceptable operational parameters. Reverse leakage current is specified at 100 nA @ 15 V, which is higher than the main part. Operating temperature range is -55°C to 150°C, which does not extend to the -65°C lower limit of the main part. Supplier device package is UMD2. The part is ROHS3 compliant with MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can BZT52B20S R9G be used as a direct replacement for BZT52C20S RRG?

A: Yes. Both parts share identical nominal voltage (20 V), power rating (200 mW), impedance (55 Ohms), reverse leakage current (45 nA @ 14 V), forward voltage (1 V @ 10 mA), and operating temperature range (-65°C to 150°C). The BZT52B20S R9G features tighter tolerance (±2% versus ±5%), which is acceptable for applications requiring the ±5% specification. Both are manufactured by Taiwan Semiconductor Corporation and packaged in SOD-323F. Packaging format differs (Cut Tape & Digi-Reel® versus Tape & Reel).

Q: What is the difference between BZT52C20S RRG and BZT52C20S R9G?

A: These parts are electrically identical, with both manufactured by Taiwan Semiconductor Corporation. Both feature 20 V nominal voltage, ±5% tolerance, 200 mW power rating, 55 Ohm impedance, and -65°C to 150°C operating temperature. The primary difference is packaging format: BZT52C20S RRG is supplied in Tape & Reel (TR) format, while BZT52C20S R9G is supplied in Cut Tape (CT) & Digi-Reel® format.

Q: Are MM3Z20VC and MM3Z20VB interchangeable with BZT52C20S RRG?

A: Both MM3Z20VC (Fairchild Semiconductor) and MM3Z20VB (onsemi) meet the critical electrical parameters: 20 V nominal voltage, 200 mW power rating, and SOD-323F package. Impedance values are 51 Ohms for both, which is lower than the main part's 55 Ohms but within acceptable operational limits. Reverse leakage current is 45 nA @ 14 V for both. Operating temperature ranges are -65°C to 150°C. Both parts are suitable for substitution where manufacturer sourcing flexibility is required.

Q: Why does UDZSTE-1720B have different impedance and leakage specifications?

A: UDZSTE-1720B is manufactured by Rohm Semiconductor and features different internal design characteristics. Impedance is specified at 85 Ohms (versus 55 Ohms for the main part), and reverse leakage current is 100 nA @ 15 V (versus 45 nA @ 14 V). These differences reflect the Rohm design approach but remain within acceptable operational parameters for 20 V, 200 mW Zener diode applications. The operating temperature range is -55°C to 150°C, which does not extend to the -65°C lower limit of the main part.

Q: What packaging formats are available for these substitute parts?

A: BZT52C20S RRG is supplied in Tape & Reel (TR) format. Substitute parts are available in multiple formats: BZT52B20S R9G and BZT52C20S R9G are supplied in Cut Tape (CT) & Digi-Reel® format; MM3Z20VC is supplied in Bulk format; MM3Z20VB is supplied in Tape & Reel (TR) format; UDZSTE-1720B is supplied in Cut Tape (CT) & Digi-Reel® format. Packaging format selection depends on assembly equipment compatibility and procurement requirements.

Q: Are all substitute parts ROHS3 compliant?

A: BZT52B20S R9G, BZT52C20S R9G, MM3Z20VB, and UDZSTE-1720B are explicitly specified as ROHS3 compliant. MM3Z20VC does not include RoHS status in the provided specifications. All parts carry REACH Unaffected or REACH Unaffected status where specified, and all are classified under ECCN EAR99 and HTSUS 8541.10.0050.

Q: Can UDZSTE-1720B be used in applications requiring -65°C operation?

A: No. UDZSTE-1720B is specified for operating temperature range of -55°C to 150°C, which does not extend to the -65°C lower limit required by the BZT52C20S RRG specification. Applications requiring -65°C operation must use BZT52C20S RRG, BZT52B20S R9G, BZT52C20S R9G, MM3Z20VC, or MM3Z20VB.

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