DDZ36-7 Equivalent & Substitute Parts

Part Overview

The DDZ36-7 is a 36 V Zener diode manufactured by Diodes Incorporated, rated for 310 mW power dissipation in a surface mount SOD-123 package. This component is classified as Active and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, design flexibility, or supply chain considerations. All substitute parts listed maintain the core 36 V Zener voltage specification and SOD-123 package form factor.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	36	V
Tolerance	±2.5%	%
Power - Max	310	mW
Impedance (Max)	85	Ohms
Current - Reverse Leakage @ Vr	50 nA @ 30 V	nA
Voltage - Forward (Max) @ If	900 mV @ 10 mA	mV
Operating Temperature	-65 to 150	°C
Package / Case	SOD-123	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution logic for the DDZ36-7 is based on the following criteria:

Primary Substitution Criteria:

Zener voltage: 36 V nominal
Package / Case: SOD-123 or SOD-123F (compatible surface mount packages)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Operating Temperature Range: Minimum -55°C to 150°C (overlaps with DDZ36-7 range of -65°C to 150°C)

Secondary Compatibility Factors:

Power rating: 200 mW to 500 mW (encompasses the 310 mW specification)
Voltage tolerance: ±2% to ±6% (acceptable variance from ±2.5%)
Impedance: 60 to 90 Ohms (within acceptable range of 85 Ohms)
Reverse leakage current: 10 nA to 100 nA (acceptable performance envelope)

Substitute parts are grouped by power rating and package variant. Parts with higher power ratings (375 mW to 500 mW) provide additional thermal margin. Parts with lower power ratings (200 mW) are suitable for applications with reduced power dissipation requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Tolerance (%)	Power (mW)	Zzt (Ohms)	Ir @ Vr (nA)	Package	Status
DDZ36-7	Diodes Incorporated	36	±2.5	310	85	50 @ 30V	SOD-123	Active
BZT52C36-E3-18	Vishay General Semiconductor	36	±5	410	87	100 @ 27V	SOD-123	Active
BZT52C36-HE3-18	Vishay General Semiconductor	36	±5	410	87	100 @ 27V	SOD-123	Obsolete
BZT52C36-TP	Micro Commercial Co	36	±6	200	90	100 @ 25.2V	SOD-123	Active
BZT52H-B36,115	Nexperia USA Inc.	36	±2	375	60	50 @ 25.2V	SOD-123F	Active
BZT52H-C36,115	Nexperia USA Inc.	36	±5	375	60	50 @ 25.2V	SOD-123F	Active
CMHZ5258B TR PBFREE	Central Semiconductor Corp	36	±5	500	70	100 @ 27V	SOD-123	Active
MMSZ4715-E3-08	Vishay General Semiconductor	36	±5	500	—	10 @ 27.3V	SOD-123	Active
MMSZ4715T1G	onsemi	36	±5	500	—	10 @ 27.3V	SOD-123	Active
MMSZ5258B-E3-08	Vishay General Semiconductor	36	±5	500	70	100 @ 27V	SOD-123	Active
MMSZ5258B-TP	Micro Commercial Co	36	±5	500	70	100 @ 27V	SOD-123	Active

Engineering Selection Recommendations

Active Status Parts (Preferred): BZT52C36-E3-18, BZT52C36-TP, BZT52H-B36,115, BZT52H-C36,115, CMHZ5258B TR PBFREE, MMSZ4715-E3-08, MMSZ4715T1G, MMSZ5258B-E3-08, and MMSZ5258B-TP are all classified as Active and are suitable for new designs and ongoing production.

Obsolete Status Parts (Not Recommended for New Designs): BZT52C36-HE3-18 is classified as Obsolete and should not be selected for new designs. This part is retained in the substitution list for reference only in legacy system maintenance scenarios.

Compliance Considerations: All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance profile of the DDZ36-7. Parts designated with AEC-Q101 qualification (BZT52C36-HE3-18, BZT52H-B36,115, BZT52H-C36,115) meet automotive-grade reliability standards.

Package Variants: SOD-123 package parts (BZT52C36-E3-18, BZT52C36-TP, CMHZ5258B TR PBFREE, MMSZ4715-E3-08, MMSZ4715T1G, MMSZ5258B-E3-08, MMSZ5258B-TP) are mechanically identical to the DDZ36-7. SOD-123F package parts (BZT52H-B36,115, BZT52H-C36,115) are compatible with SOD-123 footprints but feature a different physical form factor.

Power Rating Selection:

200 mW rating (BZT52C36-TP): For applications with lower thermal requirements
310 mW rating (DDZ36-7): Original specification
375 mW rating (BZT52H-B36,115, BZT52H-C36,115): Moderate thermal margin
410 mW rating (BZT52C36-E3-18): Enhanced thermal performance
500 mW rating (CMHZ5258B TR PBFREE, MMSZ4715-E3-08, MMSZ4715T1G, MMSZ5258B-E3-08, MMSZ5258B-TP): Maximum thermal margin

Frequently Asked Questions (FAQ)

Q: Can BZT52C36-TP be used as a direct replacement for DDZ36-7?

A: BZT52C36-TP is electrically compatible as a substitute. Both parts share the 36 V Zener voltage, SOD-123 package, and surface mount configuration. However, BZT52C36-TP has a lower power rating (200 mW versus 310 mW) and wider voltage tolerance (±6% versus ±2.5%). Selection depends on application power dissipation requirements and voltage regulation precision.

Q: What is the difference between SOD-123 and SOD-123F packages?

A: Both packages are surface mount Zener diodes with identical electrical performance. SOD-123F is a variant form factor. Parts specified in SOD-123F (BZT52H-B36,115, BZT52H-C36,115) are mechanically compatible with standard SOD-123 PCB footprints but have different physical dimensions. Verify PCB layout compatibility before substitution.

Q: Are Nexperia BZT52H-B36,115 and BZT52H-C36,115 interchangeable?

A: Both parts are electrically equivalent with 36 V Zener voltage, 375 mW power rating, and SOD-123F package. The primary difference is voltage tolerance: BZT52H-B36,115 is ±2% while BZT52H-C36,115 is ±5%. Selection depends on voltage regulation precision requirements.

Q: Why do some substitute parts have lower reverse leakage current specifications?

A: MMSZ4715-E3-08 and MMSZ4715T1G specify 10 nA reverse leakage at 27.3 V, compared to 50-100 nA for other substitutes. Lower leakage current indicates superior reverse bias performance and may be advantageous in high-impedance circuit applications. This is a performance enhancement, not a limitation.

Q: Is BZT52C36-HE3-18 suitable for new product designs?

A: BZT52C36-HE3-18 is classified as Obsolete and is not recommended for new designs. This part is listed for reference in legacy system support and repair scenarios only. Select an Active status part for new development.

Q: What is the significance of AEC-Q101 qualification on certain parts?

A: AEC-Q101 qualification indicates automotive-grade reliability testing and is present on BZT52C36-HE3-18, BZT52H-B36,115, and BZT52H-C36,115. This certification is relevant only for automotive applications. Non-automotive applications do not require this qualification.

Q: Can I substitute a 500 mW rated Zener for the 310 mW DDZ36-7?

A: Yes. Parts rated 500 mW (CMHZ5258B TR PBFREE, MMSZ4715-E3-08, MMSZ4715T1G, MMSZ5258B-E3-08, MMSZ5258B-TP) provide additional thermal margin and are electrically compatible. Higher power ratings do not degrade performance in applications requiring 310 mW or less.

Q: What does ±2.5% voltage tolerance mean for the DDZ36-7?

A: The Zener voltage will be within 36 V ± 0.9 V (35.1 V to 36.9 V) at specified test conditions. Substitute parts with ±5% or ±6% tolerance have wider voltage ranges. Verify tolerance requirements for voltage regulation precision in your application.

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