DDZ36CSF-7 Equivalent & Substitute Parts

Part Overview

The DDZ36CSF-7 is an active Zener diode manufactured by Diodes Incorporated, rated at 34.27 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 parameters within acceptable tolerance ranges and compatible mechanical packaging specifications.

Substiute Parts

DDZ36CSF-7

Diodes IncorporatedIn Stock: 113465DDZ36CSF-7 Datasheet

Current PartRFQ

BZT52C36S-TP

Micro Commercial CoIn Stock: 3879BZT52C36S-TP Datasheet

MFR RecommendedRFQ

MMXZ5258B-TP

Micro Commercial CoIn Stock: 3741MMXZ5258B-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute Zener diodes for the DDZ36CSF-7 are selected based on the following electrical and mechanical criteria:

Primary Substitution Parameters:

• Zener voltage nominal value within ±10% of 34.27 V
• Power dissipation rating of 200 mW or greater
• Surface mount package compatibility (SOD-323 or SOD-323F)
• Operating temperature range encompassing -65°C to 150°C
• RoHS3 compliance and MSL 1 rating
• Forward voltage and reverse leakage characteristics suitable for regulation applications

Identified Substitutes:

• BZT52C36S-TP (Micro Commercial Co): 36 V nominal, 200 mW, SOD-323
• MMXZ5258B-TP (Micro Commercial Co): 36 V nominal, 200 mW, SOD-323

Both substitutes operate at 36 V nominal Zener voltage, representing a 5% deviation from the main part specification. Both maintain surface mount compatibility and full compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

DDZ36CSF-7 (Primary Part)

• Highest power dissipation rating at 500 mW
• Lowest impedance at 75 Ohms
• Tightest Zener voltage tolerance at ±3%
• Full temperature range -65°C to 150°C
• ROHS3 compliant with MSL 1 rating

BZT52C36S-TP (Substitute)

• 200 mW power rating (60% reduction from main part)
• 36 V nominal Zener voltage (5% higher than main part)
• ±6% tolerance (wider than main part)
• Full temperature range -65°C to 150°C
• ROHS3 compliant with MSL 1 rating
• Identical forward voltage specification at 900 mV @ 10 mA

MMXZ5258B-TP (Substitute)

• 200 mW power rating (60% reduction from main part)
• 36 V nominal Zener voltage (5% higher than main part)
• ±5% tolerance (tighter than BZT52C36S-TP)
• Reduced minimum operating temperature at -55°C (10°C higher than main part)
• ROHS3 compliant with MSL 1 rating
• Lower impedance at 70 Ohms (compared to 75 Ohms in main part)

Selection between substitutes depends on application power requirements and temperature operating range. Both substitutes are suitable for applications where 200 mW dissipation is sufficient and 36 V nominal operation is acceptable.

Frequently Asked Questions (FAQ)

Q: Can BZT52C36S-TP or MMXZ5258B-TP directly replace DDZ36CSF-7 in all applications?

A: Direct substitution depends on application power dissipation requirements. The main part DDZ36CSF-7 is rated for 500 mW, while both substitutes are rated for 200 mW. Applications requiring greater than 200 mW dissipation cannot use these substitutes. Additionally, the 36 V nominal Zener voltage of substitutes differs from the 34.27 V specification of the main part.

Q: What is the voltage difference between the main part and substitutes?

A: The DDZ36CSF-7 operates at 34.27 V nominal, while both BZT52C36S-TP and MMXZ5258B-TP operate at 36 V nominal. This represents approximately 5% higher voltage in the substitutes. Applications with strict voltage regulation requirements must account for this difference.

Q: Are there temperature range differences between these parts?

A: The DDZ36CSF-7 and BZT52C36S-TP both operate from -65°C to 150°C. The MMXZ5258B-TP has a minimum operating temperature of -55°C, which is 10°C higher than the main part. Applications requiring operation below -55°C must use either the main part or BZT52C36S-TP.

Q: What is the impedance difference, and does it matter?

A: The DDZ36CSF-7 has a maximum impedance of 75 Ohms. BZT52C36S-TP has 90 Ohms, and MMXZ5258B-TP has 70 Ohms. Lower impedance generally provides better voltage regulation stability. MMXZ5258B-TP offers superior impedance performance compared to the main part.

Q: Are the package types compatible?

A: The main part uses SOD-323F packaging, while both substitutes use SOD-323 packaging. These are physically similar surface mount packages with compatible footprints for most PCB designs. Verify PCB layout compatibility before substitution.

Q: What are the tolerance differences?

A: The DDZ36CSF-7 has ±3% tolerance, BZT52C36S-TP has ±6% tolerance, and MMXZ5258B-TP has ±5% tolerance. Tighter tolerance in the main part provides more precise voltage regulation. Applications requiring ±3% accuracy must use the main part.

Q: Do all parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, have MSL 1 (Unlimited) moisture sensitivity rating, and are REACH unaffected. All carry EAR99 ECCN classification and identical HTSUS codes.

Q: What is the forward voltage specification difference?

A: The DDZ36CSF-7 and BZT52C36S-TP both specify 900 mV maximum forward voltage at 10 mA. The MMXZ5258B-TP specifies 1.2 V maximum forward voltage at 100 mA, which is measured at a different current level and therefore not directly comparable.