BZT52C22-13 Equivalent & Substitute Parts

Part Overview

The BZT52C22-13 is a Zener diode rated at 22 V nominal voltage with 500 mW maximum power dissipation in a surface mount SOD-123 package. Manufactured by Diodes Incorporated, this component is designed for voltage regulation and protection applications in electronic circuits. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components to maintain design continuity and support ongoing production requirements.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	22 V
Tolerance	±6%
Power - Max	500 mW
Impedance (Max)	55 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 15.4 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	SOD-123

Substitute Part Grouping Explanation

Substitution of the BZT52C22-13 is determined by strict equivalence across the following critical parameters: nominal Zener voltage (22 V), maximum power dissipation (500 mW), package type (SOD-123), mounting configuration (surface mount), and operating temperature range (-65°C to 150°C minimum). Tolerance, impedance, reverse leakage current, and forward voltage characteristics must remain within acceptable ranges to ensure functional compatibility.

Substitute parts are grouped into three categories:

Parametric Equivalents: Parts with identical or superior electrical specifications and active product status, offering direct replacement capability.

Upgrade Alternatives: Parts with reduced power ratings or modified specifications that may be suitable for applications with lower power requirements.

Manufacturer Recommended Alternatives: Parts from alternative manufacturers meeting or exceeding the original specifications with active availability and compliance certifications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power - Max	Zzt (Max)	Vf (Max) @ If	Operating Temp	Package	Product Status	RoHS Status
BZT52C22-13	Diodes Incorporated	22 V	±6%	500 mW	55 Ohms	900 mV @ 10 mA	-65°C ~ 150°C	SOD-123	Discontinued	Non-compliant
BZT52C22-13-F	Diodes Incorporated	22 V	±6%	500 mW	55 Ohms	900 mV @ 10 mA	-65°C ~ 150°C	SOD-123	Active	ROHS3 Compliant
BZT52C22-7-F	Diodes Incorporated	22 V	±6%	500 mW	55 Ohms	900 mV @ 10 mA	-65°C ~ 150°C	SOD-123	Active	ROHS3 Compliant
BZT52C22-TP	Micro Commercial Co	22 V	±6%	200 mW	55 Ohms	900 mV @ 10 mA	-65°C ~ 150°C	SOD-123	Active	ROHS3 Compliant
MMSZ5251BT1G	onsemi	22 V	±5%	500 mW	29 Ohms	900 mV @ 10 mA	-55°C ~ 150°C	SOD-123	Active	ROHS3 Compliant
SZMMSZ22T1G	onsemi	22 V	±5%	500 mW	55 Ohms	900 mV @ 10 mA	-55°C ~ 150°C	SOD-123	Active	ROHS3 Compliant
BZT52C22	Taiwan Semiconductor Corporation	22 V	±5%	500 mW	55 Ohms	1 V @ 10 mA	-65°C ~ 150°C	SOD-123F	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement)

BZT52C22-13-F and BZT52C22-7-F from Diodes Incorporated are direct parametric equivalents with identical electrical specifications to the BZT52C22-13. Both parts are active products with ROHS3 compliance and maintain the same 22 V nominal voltage, ±6% tolerance, 500 mW power rating, and SOD-123 package configuration. The primary distinction between these parts is packaging format (Tape & Reel) and supplier designation. BZT52C22-7-F offers significantly higher inventory availability (41,300 units) compared to BZT52C22-13-F (756 units).

Alternative Equivalents (Enhanced Specifications)

MMSZ5251BT1G from onsemi provides equivalent 22 V, 500 mW performance with improved impedance characteristics (29 Ohms versus 55 Ohms) and tighter tolerance (±5% versus ±6%). This part operates across a reduced temperature range (-55°C to 150°C) and is available in Cut Tape and Digi-Reel packaging. SZMMSZ22T1G from onsemi offers identical impedance and power specifications with automotive-grade qualification (AEC-Q101) and reduced reverse leakage current (50 nA versus 100 nA), suitable for applications requiring enhanced reliability.

Reduced Power Alternative

BZT52C22-TP from Micro Commercial Co maintains 22 V nominal voltage and SOD-123 package compatibility but operates at 200 mW maximum power dissipation. This part is suitable only for applications with lower power requirements and should not be used as a direct replacement in designs requiring full 500 mW capability.

Package Variant Consideration

BZT52C22 from Taiwan Semiconductor Corporation uses SOD-123F package variant rather than standard SOD-123. Verify PCB footprint compatibility before selection, as package geometry differences may affect board-level assembly.

Frequently Asked Questions (FAQ)

Q: Can BZT52C22-13-F directly replace BZT52C22-13?

A: Yes. BZT52C22-13-F is a parametric equivalent with identical electrical specifications (22 V, ±6%, 500 mW, SOD-123). The primary difference is product status (active versus discontinued) and packaging format (Tape & Reel). Both parts are functionally interchangeable in circuit applications.

Q: What is the difference between BZT52C22-13-F and BZT52C22-7-F?

A: Both parts are parametric equivalents from Diodes Incorporated with identical electrical specifications. The designation suffix (-13-F versus -7-F) indicates different supplier or manufacturing lot codes. BZT52C22-7-F has substantially higher inventory availability (41,300 units versus 756 units).

Q: Can MMSZ5251BT1G replace BZT52C22-13?

A: MMSZ5251BT1G is functionally compatible with improved specifications: tighter tolerance (±5% versus ±6%), lower impedance (29 Ohms versus 55 Ohms), and equivalent power rating (500 mW). The operating temperature range is reduced (-55°C to 150°C versus -65°C to 150°C). Verify application temperature requirements before substitution.

Q: Is BZT52C22-TP a suitable replacement?

A: BZT52C22-TP maintains 22 V voltage and SOD-123 package compatibility but operates at 200 mW maximum power versus 500 mW. This part is suitable only for applications with confirmed lower power requirements. Do not use as a direct replacement in designs requiring full 500 mW dissipation capability.

Q: What is the significance of the SOD-123F package variant?

A: BZT52C22 from Taiwan Semiconductor Corporation uses SOD-123F package, which has different physical dimensions than standard SOD-123. Verify PCB footprint compatibility with design documentation before selection. SOD-123F is not interchangeable with SOD-123 at the board level.

Q: Why does SZMMSZ22T1G have automotive qualification?

A: SZMMSZ22T1G carries AEC-Q101 automotive qualification and reduced reverse leakage current (50 nA versus 100 nA), indicating enhanced reliability screening and performance consistency. This part is suitable for automotive and high-reliability applications.

Q: What packaging formats are available for equivalent parts?

A: Substitute parts are available in Tape & Reel (TR), Cut Tape (CT), and Digi-Reel formats. Verify packaging compatibility with assembly equipment and procurement requirements. Tape & Reel format is standard for high-volume production; Cut Tape is suitable for lower-volume or prototype applications.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed (BZT52C22-13-F, BZT52C22-7-F, BZT52C22-TP, MMSZ5251BT1G, SZMMSZ22T1G, and BZT52C22) are ROHS3 compliant. The original BZT52C22-13 is RoHS non-compliant. Compliance status is critical for applications subject to RoHS regulations.

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