DDZ11CSF-7 Equivalent & Substitute Parts

Part Overview

The DDZ11CSF-7 is an active Zener diode manufactured by Diodes Incorporated, rated at 11.1 V nominal with 500 mW maximum 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. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, design flexibility, or supply chain considerations.

Substiute Parts

DDZ11CSF-7

Diodes IncorporatedIn Stock: 107310DDZ11CSF-7 Datasheet

Current PartRFQ

BZT52C11S-TP

Micro Commercial CoIn Stock: 3340BZT52C11S-TP Datasheet

MFR RecommendedRFQ

MMXZ5241B-TP

Micro Commercial CoIn Stock: 3826MMXZ5241B-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DDZ11CSF-7 is determined by the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Zener voltage nominal rating within acceptable tolerance band
• Maximum power dissipation rating equal to or greater than the original specification
• Surface mount package compatibility (SOD-323 or SOD-323F)
• Operating temperature range encompassing the original specification
• RoHS3 compliance and MSL rating equivalence

Substitution Logic: The identified substitute parts BZT52C11S-TP and MMXZ5241B-TP both feature 11 V nominal Zener voltage ratings, which fall within the tolerance range of the DDZ11CSF-7's 11.1 V specification. Both substitutes are rated for 200 mW maximum power dissipation, which is lower than the original 500 mW rating. Both are packaged in SOD-323 surface mount format and operate across the -65°C to 150°C temperature range (with MMXZ5241B-TP limited to -55°C minimum). Both maintain ROHS3 compliance and MSL 1 rating.

Parameter Comparison

Engineering Selection Recommendations

DDZ11CSF-7 (Primary Component): The DDZ11CSF-7 is the specified component with active product status, ROHS3 compliance, and unlimited MSL rating. This part provides 500 mW power dissipation capability with ±2.52% voltage tolerance and operates across the full -65°C to 150°C temperature range.

BZT52C11S-TP (Substitute): This part maintains full compatibility with the original operating temperature range (-65°C to 150°C) and carries identical ROHS3 and MSL certifications. The 200 mW power rating is lower than the original specification. The ±5% voltage tolerance is wider than the original ±2.52%. This substitute is suitable for applications where the reduced power dissipation rating does not exceed circuit requirements.

MMXZ5241B-TP (Substitute): This part is limited to -55°C minimum operating temperature, which restricts its use in applications requiring the full -65°C lower temperature bound. The 200 mW power rating and ±5% voltage tolerance present the same constraints as BZT52C11S-TP. ROHS3 and MSL certifications are maintained. This substitute is suitable for applications operating within the -55°C to 150°C range where reduced power dissipation is acceptable.

Frequently Asked Questions (FAQ)

Q: Can BZT52C11S-TP directly replace DDZ11CSF-7 in all applications?

A: BZT52C11S-TP is electrically compatible for applications where the 200 mW power dissipation rating is sufficient. The wider ±5% voltage tolerance and identical operating temperature range (-65°C to 150°C) must be evaluated against circuit design requirements. Both parts maintain ROHS3 compliance and MSL 1 rating.

Q: What is the difference between SOD-323 and SOD-323F packages?

A: Both are surface mount packages with identical pin configurations and footprints. SOD-323F is a variant designation used by some manufacturers. The parts are mechanically interchangeable on standard PCB layouts designed for SOD-323 surface mount components.

Q: Why is MMXZ5241B-TP limited to -55°C minimum temperature?

A: The MMXZ5241B-TP specification sheet indicates a -55°C to 150°C operating temperature range, which is narrower than the DDZ11CSF-7 range of -65°C to 150°C. Applications requiring operation below -55°C must use DDZ11CSF-7 or BZT52C11S-TP.

Q: How do voltage tolerances affect circuit performance?

A: The DDZ11CSF-7 provides ±2.52% tolerance (10.78 V to 11.42 V), while both substitutes provide ±5% tolerance (10.45 V to 11.55 V). Circuits designed with tight voltage regulation requirements must account for the wider tolerance band of substitute parts.

Q: What is the significance of reverse leakage current differences?

A: DDZ11CSF-7 and BZT52C11S-TP both specify 100 nA reverse leakage at their respective reverse voltages. MMXZ5241B-TP specifies 2 µA at 8.4 V, which is 20 times higher. Applications sensitive to leakage current performance should prioritize DDZ11CSF-7 or BZT52C11S-TP.

Q: Can these parts be used interchangeably in high-temperature applications?

A: All three parts operate to 150°C maximum. The choice between them depends on power dissipation requirements and voltage tolerance specifications rather than temperature capability at the upper limit.