MMSZ5247C-E3-18 Equivalent & Substitute Parts

Part Overview

The MMSZ5247C-E3-18 is a Zener diode rated at 17 V nominal with 500 mW power dissipation, manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component in SOD-123 package is designed for voltage regulation and protection applications. The part is currently Active in product status with 1058 units in stock. Equivalent and substitute parts are identified based on matching electrical specifications and package compatibility to support design flexibility and supply chain continuity.

Substiute Parts

MMSZ5247C-E3-18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1167MMSZ5247C-E3-18 Datasheet

Current PartRFQ

MMSZ5247C-HE3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 15867MMSZ5247C-HE3-08 Datasheet

Parametric EquivalentRFQ

MMSZ4704T1G

onsemiIn Stock: 8105MMSZ4704T1G Datasheet

MFR RecommendedRFQ

SZMMSZ4704T1G

onsemiIn Stock: 56214SZMMSZ4704T1G Datasheet

MFR RecommendedRFQ

SZMMSZ4704T3G

onsemiIn Stock: 20635SZMMSZ4704T3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of Zener diodes is determined by equivalence in the following critical parameters:

Primary Equivalence Criteria:

• Voltage - Zener (Nom) (Vz): 17 V
• Power - Max: 500 mW
• Package / Case: SOD-123
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 150°C

Secondary Compatibility Factors:

• Tolerance specification (±2% or ±5%)
• Impedance (Max) (Zzt)
• Current - Reverse Leakage @ Vr
• RoHS3 Compliance
• MSL Rating

The MMSZ5247C-E3-18 has identified substitutes within the Vishay MMSZ5247 series and cross-manufacturer equivalents from onsemi (MMSZ4704 and SZMMSZ4704 series). All substitute parts maintain the 17 V nominal Zener voltage and 500 mW power rating in SOD-123 packaging. Tolerance variations and reverse leakage specifications differ between manufacturers and product grades, which are documented in the parameter comparison table.

Parameter Comparison

Engineering Selection Recommendations

MMSZ5247C-HE3-08 (Vishay): This part is a parametric equivalent within the Vishay MMSZ5247 series, maintaining identical electrical specifications (17 V, ±2% tolerance, 500 mW, 19 Ohms impedance). The primary distinction is product status (Obsolete) and automotive-grade qualification (AEC-Q101). Selection of this part is appropriate for applications requiring Vishay sourcing continuity, though the Obsolete status indicates limited future availability.

MMSZ4704T1G (onsemi): This part provides electrical equivalence with 17 V nominal voltage and 500 mW power rating in SOD-123 packaging. The tolerance specification is ±5% compared to ±2% for the main part, and reverse leakage is 50 nA @ 12.9 V. This part is Active in product status with standard-grade qualification. Selection is appropriate for general-purpose applications where ±5% tolerance is acceptable.

SZMMSZ4704T1G (onsemi): This part is electrically equivalent to MMSZ4704T1G with the addition of automotive-grade qualification (AEC-Q101). It maintains 17 V nominal voltage, 500 mW power rating, and ±5% tolerance. This part is Active with the highest inventory availability (56200 units). Selection is appropriate for automotive applications requiring AEC-Q101 qualification.

SZMMSZ4704T3G (onsemi): This part provides 17 V nominal voltage and 500 mW power rating in SOD-123 packaging with automotive-grade qualification (AEC-Q101). Tolerance specification is not provided in the available data. This part is Active in product status. Selection is appropriate for automotive applications where tolerance specification is not a critical design parameter.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5247C-E3-18 be directly replaced with MMSZ5247C-HE3-08?

A: Yes, MMSZ5247C-HE3-08 is a parametric equivalent with identical electrical specifications (17 V, ±2% tolerance, 500 mW, 19 Ohms impedance, 100 nA reverse leakage). The primary consideration is that MMSZ5247C-HE3-08 is Obsolete in product status, which may affect long-term availability.

Q: What is the tolerance difference between Vishay and onsemi Zener diodes in this comparison?

A: MMSZ5247C-E3-18 and MMSZ5247C-HE3-08 (Vishay) specify ±2% tolerance, while MMSZ4704T1G and SZMMSZ4704T1G (onsemi) specify ±5% tolerance. SZMMSZ4704T3G does not provide tolerance specification. Applications requiring tighter voltage regulation should account for this difference in circuit design.

Q: Are all substitute parts qualified for automotive applications?

A: MMSZ5247C-E3-18 (main part) does not specify automotive qualification. MMSZ5247C-HE3-08 is automotive-grade with AEC-Q101 qualification. MMSZ4704T1G is standard-grade without automotive qualification. SZMMSZ4704T1G and SZMMSZ4704T3G are both automotive-grade with AEC-Q101 qualification. Selection should be based on application requirements.

Q: Is the SOD-123 package identical across all substitute parts?

A: Yes, all parts listed (main and substitutes) use SOD-123 package with surface mount mounting type. PCB layout and assembly processes are compatible across all parts without modification.

Q: What is the difference in reverse leakage current between the main part and onsemi substitutes?

A: MMSZ5247C-E3-18 specifies 100 nA @ 13 V reverse leakage. MMSZ4704T1G, SZMMSZ4704T1G, and SZMMSZ4704T3G specify 50 nA @ 12.9 V reverse leakage. The onsemi parts exhibit lower reverse leakage current, which may provide improved performance in low-current applications.

Q: Are all parts RoHS3 compliant?

A: Yes, all parts listed (main and substitutes) are ROHS3 Compliant with MSL rating of 1 (Unlimited), indicating compatibility with standard lead-free assembly processes and unlimited shelf life under controlled storage conditions.

Q: Which substitute part has the highest inventory availability?

A: SZMMSZ4704T1G has the highest inventory with 56200 units in stock, followed by MMSZ5247C-HE3-08 with 15798 units. MMSZ5247C-E3-18 (main part) has 1058 units available.