DDZ22CSF-7 Equivalent & Substitute Parts

Part Overview

The DDZ22CSF-7 is an active Zener diode manufactured by Diodes Incorporated, rated at 21.63 V nominal with 500 mW power dissipation in a surface mount SOD-323F package. This component is designed for voltage regulation and protection applications requiring precise Zener voltage characteristics in compact form factors. Substitute parts are identified based on matching electrical specifications, package compatibility, and regulatory compliance to support procurement flexibility and supply chain continuity.

Substiute Parts

DDZ22CSF-7

Diodes IncorporatedIn Stock: 3406DDZ22CSF-7 Datasheet

Current PartRFQ

BZT52C22S-TP

Micro Commercial CoIn Stock: 3731BZT52C22S-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DDZ22CSF-7 is determined by the following critical parameters:

Zener Voltage Matching: The nominal Zener voltage must fall within the application tolerance window. The DDZ22CSF-7 operates at 21.63 V with ±3% tolerance. Substitute parts with nominal Zener voltages of 22 V and ±6% tolerance remain functionally equivalent within typical circuit design margins for voltage regulation applications.

Power Dissipation Capability: The DDZ22CSF-7 is rated for 500 mW maximum power dissipation. Substitute parts with lower power ratings (200 mW) are acceptable only when circuit current and voltage conditions do not exceed the substitute part's thermal limits.

Package Compatibility: Both the main part (SOD-323F) and substitute part (SOD-323) are surface mount packages with compatible footprints and lead configurations, enabling direct board-level substitution.

Regulatory Compliance: All parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, ensuring environmental and supply chain consistency.

Operating Temperature Range: Both the main part and substitute operate across -65°C to 150°C, supporting identical thermal operating conditions.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (DDZ22CSF-7): Use the DDZ22CSF-7 when circuit design requires the full 500 mW power dissipation capability and ±3% Zener voltage tolerance. This part is the specified component and maintains active product status with full manufacturer support.

Substitute Selection (BZT52C22S-TP): The BZT52C22S-TP is a valid substitute when:

• Circuit current and voltage conditions limit power dissipation to 200 mW or below
• Application tolerance permits ±6% Zener voltage variation
• Supply chain constraints or inventory availability necessitate alternative sourcing

Both parts maintain identical operating temperature ranges, forward voltage characteristics, and regulatory compliance (ROHS3, MSL Level 1, REACH Unaffected), ensuring functional equivalence within specified electrical limits.

Frequently Asked Questions (FAQ)

Q: Can the BZT52C22S-TP directly replace the DDZ22CSF-7 in all applications?

A: Direct substitution is valid only when circuit design does not require the full 500 mW power dissipation of the DDZ22CSF-7. The substitute part is rated for 200 mW maximum. Verify that actual circuit current and voltage conditions remain within the 200 mW limit. Additionally, the ±6% tolerance of the substitute part must be acceptable for the application's voltage regulation requirements.

Q: What is the voltage difference between the DDZ22CSF-7 and BZT52C22S-TP?

A: The DDZ22CSF-7 has a nominal Zener voltage of 21.63 V, while the BZT52C22S-TP is rated at 22 V. This represents a 0.37 V difference. Within typical voltage regulation circuit design margins, this difference is acceptable. However, applications requiring precise voltage reference should use the DDZ22CSF-7 with its ±3% tolerance specification.

Q: Are the SOD-323F and SOD-323 packages interchangeable?

A: The SOD-323F and SOD-323 are compatible surface mount packages with equivalent footprints and lead configurations. Both parts can be mounted on the same PCB layout without modification. No package-level redesign is required for substitution.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the DDZ22CSF-7 and BZT52C22S-TP are ROHS3 compliant, carry MSL Level 1 (Unlimited) ratings, and are REACH Unaffected. No regulatory conflicts exist between the two parts.

Q: What is the impedance specification, and is it identical between both parts?

A: Both parts specify a maximum impedance (Zzt) of 55 Ohms. This parameter is identical and does not differentiate the parts for substitution purposes.

Q: How do the reverse leakage currents compare?

A: The DDZ22CSF-7 specifies 70 nA reverse leakage at 20 V, while the BZT52C22S-TP specifies 100 nA at 15.4 V. The substitute exhibits slightly higher leakage current. For applications sensitive to leakage characteristics, the DDZ22CSF-7 is the preferred choice.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -65°C to 150°C. The operating temperature range is identical and does not restrict substitution.

Q: Is the forward voltage specification the same for both parts?

A: Yes. Both the DDZ22CSF-7 and BZT52C22S-TP specify a maximum forward voltage of 900 mV at 10 mA forward current. This parameter is identical between the two parts.