DDZ7V5CS-7 Equivalent & Substitute Parts

Part Overview

The DDZ7V5CS-7 is a surface mount Zener diode manufactured by Diodes Incorporated, rated at 7.5 V nominal with 200 mW power dissipation in SOD-323 packaging. This component is classified as Active and complies with ROHS3 standards. Substitute parts are identified when equivalent electrical performance is required across different package formats, power ratings, or when the primary part becomes unavailable. Alternative devices maintain the 7.5 V Zener voltage specification while accommodating different circuit board layouts, thermal requirements, or supply chain constraints.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	7.5	V
Tolerance	±3%	—
Power - Max	200	mW
Impedance (Max)	6	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 6 V	—
Voltage - Forward (Max) @ If	900 mV @ 10 mA	—
Operating Temperature Range	-65 to 150	°C
Package / Case	SOD-323	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the DDZ7V5CS-7 are grouped based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - Zener (Nom): 7.5 V (exact match required)
Mounting Type: Surface Mount
RoHS3 Compliance: Required
Moisture Sensitivity Level: 1 (Unlimited)

Secondary Variation Parameters:

Power - Max: 200 mW to 500 mW (higher power ratings acceptable for circuit protection applications)
Package / Case: SOD-323 (primary), SOD-123 (alternative with different footprint)
Tolerance: ±2% to ±6% (voltage regulation tolerance)
Operating Temperature: -65°C to -55°C minimum; 150°C maximum
Impedance (Max): 6 to 15 Ohms

Substitutes are organized into two categories: direct package equivalents (SOD-323) and alternative package formats (SOD-123) with increased power handling capability. Parts with higher power ratings (410 mW to 500 mW) are suitable when thermal margin or higher current dissipation is required. Tolerance variations are acceptable provided the application does not require the ±3% specification of the primary part.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Package	Impedance (Max)	Temp Range	Status
DDZ7V5CS-7	Diodes Incorporated	7.5 V	±3%	200 mW	SOD-323	6 Ω	-65 to 150°C	Active
BZT52B7V5-E3-08	Vishay General Semiconductor	7.5 V	±2%	410 mW	SOD-123	7 Ω	-55 to 150°C	Active
BZT52C7V5-E3-08	Vishay General Semiconductor	7.5 V	±5%	410 mW	SOD-123	7 Ω	-55 to 150°C	Active
BZT52C7V5-HE3-08	Vishay General Semiconductor	7.5 V	±5%	410 mW	SOD-123	7 Ω	-55 to 150°C	Obsolete
BZT52C7V5-TP	Micro Commercial Co	7.5 V	±6%	200 mW	SOD-123	15 Ω	-65 to 150°C	Active
CMHZ5236B TR PBFREE	Central Semiconductor Corp	7.5 V	±5%	500 mW	SOD-123	6 Ω	-65 to 150°C	Active
MMSZ4693-E3-08	Vishay General Semiconductor	7.5 V	±5%	500 mW	SOD-123	—	-55 to 150°C	Active
MMSZ4693-E3-18	Vishay General Semiconductor	7.5 V	±5%	500 mW	SOD-123	—	-55 to 150°C	Active
MMSZ4693-HE3-08	Vishay General Semiconductor	7.5 V	±5%	500 mW	SOD-123	—	-55 to 150°C	Obsolete
MMSZ4693-TP	Micro Commercial Co	7.5 V	±5%	500 mW	SOD-123	—	-55 to 150°C	Active

Engineering Selection Recommendations

Active Status Parts (Recommended for New Designs):

BZT52B7V5-E3-08 and BZT52C7V5-E3-08 from Vishay General Semiconductor are Active products suitable for new circuit implementations. Both devices provide 410 mW power dissipation in SOD-123 packaging, offering increased thermal margin compared to the DDZ7V5CS-7. BZT52B7V5-E3-08 features ±2% tolerance, providing tighter voltage regulation. BZT52C7V5-E3-08 operates with ±5% tolerance. Both maintain the -55°C to 150°C operating range and ROHS3 compliance.

CMHZ5236B TR PBFREE from Central Semiconductor Corp provides 500 mW power dissipation with ±5% tolerance and maintains the full -65°C to 150°C temperature range of the primary part. This device is suitable for applications requiring maximum thermal headroom.

MMSZ4693-E3-08 and MMSZ4693-E3-18 from Vishay General Semiconductor deliver 500 mW power dissipation with ±5% tolerance. Both are Active products with ROHS3 compliance. MMSZ4693-TP from Micro Commercial Co provides equivalent 500 mW performance with Active status.

BZT52C7V5-TP from Micro Commercial Co matches the 200 mW power rating of the primary part while offering SOD-123 packaging. This device maintains the -65°C to 150°C temperature range and is Active.

Obsolete Status Parts (Not Recommended for New Designs):

BZT52C7V5-HE3-08 and MMSZ4693-HE3-08 are classified as Obsolete and carry AEC-Q101 automotive qualification. These parts are not suitable for new design implementations.

Package Considerations:

The DDZ7V5CS-7 uses SOD-323 packaging. All substitute parts listed employ SOD-123 packaging, which has a different footprint and requires circuit board layout modification. SOD-123 devices are physically larger than SOD-323 and occupy greater board area. Verify PCB layout compatibility before substitution.

Frequently Asked Questions (FAQ)

Q: Can I substitute a SOD-123 packaged device for the SOD-323 DDZ7V5CS-7?

A: SOD-123 and SOD-323 packages have different physical dimensions and lead configurations. Direct footprint substitution is not possible without circuit board redesign. SOD-123 is larger and requires modified PCB layout, trace routing, and component placement.

Q: What is the difference between ±2%, ±3%, ±5%, and ±6% tolerance specifications?

A: Tolerance indicates the allowable deviation from the nominal 7.5 V Zener voltage. ±2% tolerance (BZT52B7V5-E3-08) provides the tightest voltage regulation, with acceptable voltage range of 7.35 V to 7.65 V. ±3% tolerance (DDZ7V5CS-7) allows 7.275 V to 7.725 V. ±5% tolerance permits 7.125 V to 7.875 V. ±6% tolerance (BZT52C7V5-TP) allows 7.05 V to 7.95 V. Applications requiring precise voltage regulation should select lower tolerance values.

Q: Why would I choose a higher power rating (410 mW or 500 mW) over the 200 mW primary part?

A: Higher power ratings provide increased thermal margin and allow the device to dissipate greater current without exceeding maximum junction temperature. Applications with higher reverse current or continuous operation at elevated ambient temperatures benefit from increased power dissipation capability. Higher power devices reduce thermal stress and extend component lifetime.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed in this reference are ROHS3 compliant. Compliance is a mandatory requirement for substitution eligibility.

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

A: The DDZ7V5CS-7 and CMHZ5236B TR PBFREE operate from -65°C minimum, while Vishay BZT52 and MMSZ4693 series operate from -55°C minimum. Applications requiring operation below -55°C must use parts with -65°C minimum rating. For applications operating above -55°C, both specifications are acceptable.

Q: Can I use an Obsolete part as a substitute?

A: Obsolete parts (BZT52C7V5-HE3-08 and MMSZ4693-HE3-08) are not recommended for new designs. Obsolete status indicates discontinued production and limited future availability. Use only Active status parts for new circuit implementations.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive qualification standard. Parts carrying this qualification (BZT52C7V5-HE3-08 and MMSZ4693-HE3-08) have undergone automotive-grade reliability testing. However, these parts are Obsolete and should not be selected for new designs.

Q: How do I determine which substitute part is best for my application?

A: Selection depends on three primary factors: (1) Package compatibility—verify SOD-123 footprint fits your PCB layout; (2) Power dissipation requirement—select 200 mW, 410 mW, or 500 mW based on circuit current levels; (3) Voltage tolerance—choose ±2%, ±3%, ±5%, or ±6% based on regulation precision requirements. All listed Active parts maintain 7.5 V nominal voltage and ROHS3 compliance.

Q: What is Moisture Sensitivity Level (MSL) 1?

A: MSL 1 indicates unlimited shelf life without moisture absorption concerns. The component does not require special dry-pack storage or baking procedures before soldering. All parts in this reference maintain MSL 1 classification.

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