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MM5Z18VT5GF Equivalent & Substitute Parts
Part Overview
The MM5Z18VT5GF is an 18 V Zener diode rated for 300 mW maximum power dissipation in a surface mount SOD-523 package. Manufactured by Nexperia USA Inc., this component functions as a voltage regulator diode for circuit protection and voltage reference applications. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).
Substitute parts are identified when electrical parameters, mechanical packaging, and operational ratings remain within specification tolerances, enabling direct replacement in existing designs without circuit modification.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Zener (Nominal) | 18 | V |
| Tolerance | ±2 | % |
| Power - Maximum | 300 | mW |
| Impedance (Maximum) | 45 | Ohms |
| Current - Reverse Leakage @ Vr | 50 | nA @ 12.6 V |
| Voltage - Forward (Maximum) @ If | 1.1 | V @ 100 mA |
| Operating Temperature (Junction) | 150 | °C |
| Package / Case | SC-79, SOD-523 | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution eligibility for the MM5Z18VT5GF is determined by strict equivalence across the following critical parameters:
- Zener Voltage (Nominal): 18 V with ±2% tolerance
- Power Rating: 300 mW maximum dissipation
- Package Type: SOD-523 surface mount configuration
- Impedance: 45 Ohms maximum
- Reverse Leakage Current: 50 nA @ 12.6 V
- Forward Voltage: 1.1 V maximum @ 100 mA
- Junction Temperature Rating: 150°C
- Compliance: RoHS3 and REACH requirements
The substitute part SZMM5Z18VT5GF meets all electrical and mechanical specifications identical to the primary part. Both components are manufactured by Nexperia USA Inc. and share the same functional classification as voltage regulator diodes in the MM5Z series family.
Parameter Comparison
| Parameter | MM5Z18VT5GF | SZMM5Z18VT5GF | Match |
|---|---|---|---|
| Manufacturer | Nexperia USA Inc. | Nexperia USA Inc. | Yes |
| Category | Diodes, Zener | Diodes, Zener | Yes |
| Voltage - Zener (Nom) | 18 V | 18 V | Yes |
| Tolerance | ±2% | ±2% | Yes |
| Power - Max | 300 mW | 300 mW | Yes |
| Impedance (Max) | 45 Ohms | 45 Ohms | Yes |
| Current - Reverse Leakage @ Vr | 50 nA @ 12.6 V | 50 nA @ 12.6 V | Yes |
| Voltage - Forward (Vf) (Max) @ If | 1.1 V @ 100 mA | 1.1 V @ 100 mA | Yes |
| Operating Temperature | 150°C (TJ) | 150°C (TJ) | Yes |
| Package / Case | SC-79, SOD-523 | SC-79, SOD-523 | Yes |
| Mounting Type | Surface Mount | Surface Mount | Yes |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Yes |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | Yes |
| REACH Status | REACH Unaffected | REACH Unaffected | Yes |
| Product Status | Active | Active | Yes |
Engineering Selection Recommendations
Both MM5Z18VT5GF and SZMM5Z18VT5GF are Active products manufactured by Nexperia USA Inc. with identical electrical specifications and mechanical packaging. Selection between these parts is based on availability and supply chain requirements rather than technical differentiation.
The SZMM5Z18VT5GF carries AEC-Q101 automotive qualification, indicating suitability for automotive-grade applications where enhanced reliability screening is required. The MM5Z18VT5GF remains suitable for general industrial and consumer applications meeting the same compliance standards.
Both parts satisfy RoHS3 and REACH regulatory requirements with unlimited moisture sensitivity rating (MSL 1), eliminating moisture-related handling constraints during assembly and storage.
Frequently Asked Questions (FAQ)
Q: Can SZMM5Z18VT5GF replace MM5Z18VT5GF in existing designs?
A: Yes. Both parts share identical electrical parameters (18 V nominal zener voltage, 300 mW power rating, ±2% tolerance, 45 Ohms impedance) and mechanical packaging (SOD-523 surface mount). Direct substitution is valid without circuit modification.
Q: What is the difference between MM5Z18VT5GF and SZMM5Z18VT5GF?
A: The SZMM5Z18VT5GF includes AEC-Q101 automotive qualification, indicating compliance with automotive reliability standards. Electrical and mechanical specifications are identical. Selection depends on application requirements and supply availability.
Q: Are both parts RoHS3 compliant?
A: Yes. Both MM5Z18VT5GF and SZMM5Z18VT5GF are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.
Q: What is the moisture sensitivity level for these parts?
A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture-related handling restrictions during assembly, storage, or transportation.
Q: Can these parts be used interchangeably in high-temperature applications?
A: Yes. Both parts are rated for 150°C junction temperature (TJ), supporting equivalent thermal performance in circuit designs requiring elevated operating temperatures.
Q: What is the reverse leakage current specification?
A: Both parts specify 50 nA maximum reverse leakage current measured at 12.6 V reverse bias, ensuring consistent leakage characteristics for voltage regulation applications.
Q: Are these parts suitable for automotive applications?
A: The SZMM5Z18VT5GF carries AEC-Q101 automotive qualification. The MM5Z18VT5GF is suitable for general applications. Automotive-specific designs should specify SZMM5Z18VT5GF.
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