DDZ22DS-7 Equivalent & Substitute Parts

Part Overview

The DDZ22DS-7 is a 22 V Zener diode manufactured by Diodes Incorporated, rated for 200 mW power dissipation in a surface mount SOD-323 package. This component is classified as Active and is ROHS3 compliant. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage circuits. Substitute parts may be required due to inventory availability, lead time constraints, package preferences, or application-specific performance requirements while maintaining electrical compatibility within defined tolerance ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	22	V
Tolerance	±2.5%	—
Power - Maximum	200	mW
Impedance (Maximum)	30	Ohms
Current - Reverse Leakage @ Vr	50 nA @ 17 V	—
Operating Temperature Range	-65°C to 150°C	—
Mounting Type	Surface Mount	—
Package	SOD-323 (SC-76)	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the DDZ22DS-7 is determined by the following critical parameters: nominal Zener voltage (22 V), power rating capability, package type, and tolerance specification. All substitute parts listed maintain the 22 V nominal Zener voltage and surface mount configuration. Substitutes are grouped into two primary categories based on package type: SOD-323 package substitutes and SOD-123 package substitutes.

SOD-323 Package Substitutes maintain identical package geometry and are direct mechanical replacements. These include BZX384-B22,115 and BZX384C22-E3-08, which provide equal or greater power ratings (300 mW and 200 mW respectively) with tighter or equivalent voltage tolerance.

SOD-123 Package Substitutes offer higher power ratings (200 mW to 500 mW) but require PCB layout modification due to different package dimensions. These include BZT52B22-E3-08, BZT52C22-E3-08, BZT52C22-TP, CMHZ5251B TR PBFREE, MMSZ4708-E3-08, MMSZ4708T1G, MMSZ5251B-E3-08, and MMSZ5251B-TP.

All substitute parts are Active status, ROHS3 compliant, and maintain unlimited moisture sensitivity level (MSL 1).

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Impedance (Max)	Reverse Leakage @ Vr	Temp Range	Package	Status
DDZ22DS-7	Diodes Incorporated	22 V	±2.5%	200 mW	30 Ω	50 nA @ 17 V	-65°C to 150°C	SOD-323	Active
BZT52B22-E3-08	Vishay General Semiconductor	22 V	±2%	410 mW	55 Ω	100 nA @ 17 V	-55°C to 150°C	SOD-123	Active
BZT52C22-E3-08	Vishay General Semiconductor	22 V	±5%	410 mW	55 Ω	100 nA @ 17 V	-55°C to 150°C	SOD-123	Active
BZT52C22-TP	Micro Commercial Co	22 V	±6%	200 mW	55 Ω	100 nA @ 15.4 V	-65°C to 150°C	SOD-123	Active
BZX384-B22,115	Nexperia USA Inc.	22 V	±2%	300 mW	55 Ω	50 nA @ 15.4 V	-65°C to 150°C	SOD-323	Active
BZX384C22-E3-08	Vishay General Semiconductor	22 V	±5%	200 mW	55 Ω	50 nA @ 15.4 V	-55°C to 150°C	SOD-323	Active
CMHZ5251B TR PBFREE	Central Semiconductor Corp	22 V	±5%	500 mW	29 Ω	100 nA @ 17 V	-55°C to 150°C	SOD-123	Active
MMSZ4708-E3-08	Vishay General Semiconductor	22 V	±5%	500 mW	—	10 nA @ 16.7 V	-55°C to 150°C	SOD-123	Active
MMSZ4708T1G	onsemi	22 V	±5%	500 mW	—	10 nA @ 16.7 V	-55°C to 150°C	SOD-123	Active
MMSZ5251B-E3-08	Vishay General Semiconductor	22 V	±5%	500 mW	29 Ω	100 nA @ 17 V	-55°C to 150°C	SOD-123	Active
MMSZ5251B-TP	Micro Commercial Co	22 V	±5%	500 mW	29 Ω	100 nA @ 17 V	-55°C to 150°C	SOD-123	Active

Engineering Selection Recommendations

Direct Package Replacement (SOD-323): For applications requiring no PCB layout modification, BZX384-B22,115 and BZX384C22-E3-08 are direct mechanical substitutes. BZX384-B22,115 provides increased power handling (300 mW) with ±2% tolerance and maintains the -65°C to 150°C operating range. BZX384C22-E3-08 matches the original 200 mW power rating with ±5% tolerance but operates to -55°C minimum.

Higher Power Capability (SOD-123): Applications requiring enhanced thermal performance or higher power dissipation capacity can utilize SOD-123 package substitutes. MMSZ4708-E3-08 and MMSZ4708T1G both provide 500 mW rating with superior reverse leakage characteristics (10 nA @ 16.7 V). MMSZ5251B-E3-08 and MMSZ5251B-TP offer 500 mW with impedance matching the original part (29 Ω).

Matched Tolerance Selection: For applications sensitive to voltage tolerance, BZT52B22-E3-08 provides ±2% tolerance in SOD-123 package. BZT52C22-TP maintains the original -65°C to 150°C temperature range in SOD-123 package with 200 mW power rating.

All substitute parts maintain ROHS3 compliance, unlimited moisture sensitivity level, and Active product status consistent with the original DDZ22DS-7.

Frequently Asked Questions (FAQ)

Q: Can I substitute a SOD-123 package part for the SOD-323 original?

A: SOD-123 and SOD-323 packages have different physical dimensions and pin spacing. Substitution requires PCB layout modification. Direct mechanical replacement without layout changes is only possible with other SOD-323 package parts: BZX384-B22,115 or BZX384C22-E3-08.

Q: What is the significance of the ±2.5% tolerance on the original DDZ22DS-7?

A: Tolerance specifies the accuracy of the nominal 22 V Zener voltage. The ±2.5% tolerance means the actual voltage will be between 21.45 V and 22.55 V. Substitute parts with ±2%, ±5%, or ±6% tolerance may be acceptable depending on circuit requirements. Tighter tolerance (±2%) provides better voltage regulation; wider tolerance (±5%, ±6%) may be acceptable in less critical applications.

Q: Why do some substitute parts have higher power ratings?

A: Higher power ratings (410 mW, 500 mW) indicate greater thermal dissipation capability. These parts can handle higher current loads without exceeding maximum junction temperature. Selection depends on actual circuit power requirements. Oversizing power rating does not degrade performance in lower-power applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and maintain unlimited moisture sensitivity level (MSL 1), matching the original DDZ22DS-7 compliance status.

Q: What is the difference between impedance values of 30 Ω and 55 Ω?

A: Impedance (Zzt) affects dynamic resistance and voltage regulation characteristics. Lower impedance (30 Ω) provides better voltage stability under load changes. Substitute parts with 55 Ω impedance are acceptable for most applications but may exhibit slightly higher voltage variation with current changes.

Q: Can I use MMSZ4708T1G as a direct replacement?

A: MMSZ4708T1G is electrically compatible (22 V, ±5%, 500 mW, SOD-123 package) but requires PCB layout modification due to different package type. It offers superior reverse leakage performance (10 nA @ 16.7 V) compared to the original (50 nA @ 17 V).

Q: What is the operating temperature range difference between -55°C and -65°C minimum?

A: The original DDZ22DS-7 operates to -65°C minimum. Some substitutes (BZT52B22-E3-08, BZT52C22-E3-08, CMHZ5251B TR PBFREE, MMSZ4708-E3-08, MMSZ4708T1G, MMSZ5251B-E3-08, MMSZ5251B-TP) have -55°C minimum. Selection depends on application environment. For applications requiring operation below -55°C, use BZT52C22-TP, BZX384-B22,115, or BZX384C22-E3-08.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message