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MM5Z15VT1G Equivalent & Substitute Parts
Part Overview
The MM5Z15VT1G is a Zener diode manufactured by onsemi, rated at 15 V nominal voltage with 500 mW maximum power dissipation in a surface mount SOD-523 package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified when design requirements permit tolerance of variations in power rating, impedance, or packaging format while maintaining the core electrical specifications of 15 V Zener voltage and ±5% tolerance. Substitutes are necessary when primary part availability is limited, when alternative packaging formats are required for manufacturing processes, or when automotive-grade qualification is mandated by application requirements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Zener (Nom) | 15 | V |
| Tolerance | ±5% | % |
| Power - Max | 500 | mW |
| Impedance (Max) | 30 | Ohms |
| Current - Reverse Leakage @ Vr | 50 | nA @ 10.5 V |
| Voltage - Forward (Vf) (Max) @ If | 900 | mV @ 10 mA |
| Operating Temperature | -65 to 150 | °C |
| Package / Case | SC-79, SOD-523 | |
| Mounting Type | Surface Mount | |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution logic for the MM5Z15VT1G is determined by the following critical parameters: Zener voltage (15 V), voltage tolerance (±5%), package type (SOD-523), and mounting method (surface mount). Parts are grouped into three categories based on deviation from the main part specifications:
Parametric Equivalent (Full Compatibility): Parts with identical Zener voltage, tolerance, power rating, impedance, and package. These parts are direct functional replacements with no circuit performance impact.
Direct Manufacturer Equivalent (Reduced Power Rating): Parts with identical Zener voltage, tolerance, and package but reduced maximum power dissipation (300 mW versus 500 mW). These parts are suitable for applications where circuit power requirements do not exceed the substitute part rating.
Similar Parts (Tolerance or Power Variation): Parts with identical Zener voltage and package but variations in tolerance (±2% or ±6%), power rating (100 mW to 550 mW), or impedance. These parts are suitable when application requirements permit tolerance deviations or when power dissipation margins exist.
Package Variant (Different Form Factor): Parts with identical electrical specifications but different package types (SOD-323F versus SOD-523). These parts require PCB layout modification and are suitable only when physical space constraints or manufacturing process changes justify redesign.
Parameter Comparison
| Part Number | Manufacturer | Vz (V) | Tolerance | Power (mW) | Zzt (Ohms) | Vf @ If (mV) | Package | Packaging Format | Automotive Grade |
|---|---|---|---|---|---|---|---|---|---|
| MM5Z15VT1G | onsemi | 15 | ±5% | 500 | 30 | 900 @ 10 mA | SOD-523 | Cut Tape (CT) | No |
| SZMM5Z15VT1G | onsemi | 15 | ±5% | 500 | 30 | 900 @ 10 mA | SOD-523 | Tape & Reel (TR) | Yes (AEC-Q101) |
| BZX585-C15,115 | Nexperia USA Inc. | 15 | ±5% | 300 | 15 | 1.1 @ 100 mA | SOD-523 | Cut Tape (CT) | Yes (AEC-Q100) |
| BZX585-C15,135 | Nexperia USA Inc. | 15 | ±5% | 300 | 15 | 1.1 @ 100 mA | SOD-523 | Tape & Reel (TR) | Yes (AEC-Q100) |
| BZT52C15T-7 | Diodes Incorporated | 15 | ±6% | 300 | 30 | 900 @ 10 mA | SOD-523 | Cut Tape (CT) | No |
| BZT52C15T-TP | Micro Commercial Co | 15 | ±6% | 100 | 30 | 900 @ 10 mA | SOD-523 | Tape & Reel (TR) | No |
| BZX584C15-AU_R1_000A1 | Panjit International Inc. | 15 | ±5% | 200 | 30 | Not specified | SOD-523 | Tape & Reel (TR) | Yes (AEC-Q101) |
| BZX584C15_R1_00001 | Panjit International Inc. | 15 | ±5% | 200 | 30 | 900 @ 10 mA | SOD-523 | Tape & Reel (TR) | No |
| BZX585-B15,115 | Nexperia USA Inc. | 15 | ±2% | 300 | 15 | 1.1 @ 100 mA | SOD-523 | Tape & Reel (TR) | Yes (AEC-Q100) |
| BZX84J-B15,115 | Nexperia USA Inc. | 15 | ±2% | 550 | 15 | 1.1 @ 100 mA | SOD-323F | Tape & Reel (TR) | Yes (AEC-Q101) |
| CZRU52C15 | Comchip Technology | 15 | ±5% | 150 | 30 | 900 @ 10 mA | 0603/SOD-523F | Tape & Reel (TR) | No |
Engineering Selection Recommendations
For Direct Replacement (No Design Changes Required): SZMM5Z15VT1G is the parametric equivalent of MM5Z15VT1G with identical electrical specifications. The primary difference is packaging format (Tape & Reel versus Cut Tape) and automotive-grade qualification (AEC-Q101). Selection of SZMM5Z15VT1G is appropriate when manufacturing processes require reel-based component feeding or when automotive compliance is mandated by application standards.
For Reduced Power Dissipation Applications: BZX585-C15,115 and BZX585-C15,135 are suitable substitutes when circuit design permits operation at 300 mW maximum power dissipation. Both parts maintain 15 V Zener voltage and ±5% tolerance. BZX585-C15,135 is available in Tape & Reel format and carries AEC-Q100 automotive qualification. BZX585-C15,115 is available in Cut Tape format. Lower impedance (15 Ohms versus 30 Ohms) provides improved voltage regulation characteristics.
For Automotive Applications: BZX585-B15,115 provides ±2% tolerance with AEC-Q100 qualification in Tape & Reel format at 300 mW power rating. BZX84J-B15,115 provides ±2% tolerance with AEC-Q101 qualification at 550 mW power rating in SOD-323F package. Both parts are suitable for automotive-grade circuit requirements with enhanced voltage accuracy.
For Space-Constrained Designs: BZX84J-B15,115 in SOD-323F package provides higher power dissipation (550 mW) in a smaller form factor compared to SOD-523. This part is suitable when PCB layout modifications are acceptable and higher power handling is required.
For Lower Power Applications: BZT52C15T-TP is suitable when maximum power dissipation does not exceed 100 mW. This part maintains 15 V Zener voltage with ±6% tolerance and is available in Tape & Reel format. CZRU52C15 is suitable for applications requiring 150 mW maximum dissipation with ±5% tolerance in 0603/SOD-523F package format.
For Reduced Power with Automotive Qualification: BZX584C15-AU_R1_000A1 and BZX584C15_R1_00001 are suitable when 200 mW power dissipation is acceptable. BZX584C15-AU_R1_000A1 carries AEC-Q101 automotive qualification. Both parts maintain 15 V Zener voltage with ±5% tolerance in Tape & Reel format.
Frequently Asked Questions (FAQ)
Q: Can BZX585-C15,135 replace MM5Z15VT1G in all applications? A: BZX585-C15,135 is suitable for applications where maximum power dissipation does not exceed 300 mW. The main part is rated at 500 mW. If circuit design includes power margin above 300 mW, substitution is not appropriate. Electrical specifications for Zener voltage (15 V) and tolerance (±5%) are identical.
Q: What is the difference between MM5Z15VT1G and SZMM5Z15VT1G? A: Both parts are manufactured by onsemi with identical electrical specifications. The primary differences are packaging format (Cut Tape versus Tape & Reel) and automotive qualification (SZMM5Z15VT1G carries AEC-Q101). Selection depends on manufacturing process requirements and application standards.
Q: Can I use BZT52C15T-TP as a substitute for MM5Z15VT1G? A: BZT52C15T-TP is suitable only for applications where maximum power dissipation does not exceed 100 mW. The main part is rated at 500 mW. Additionally, BZT52C15T-TP has ±6% tolerance versus ±5% for the main part. Verify circuit power requirements before substitution.
Q: Why do some substitute parts have different impedance values? A: Impedance (Zzt) affects voltage regulation characteristics. Lower impedance (15 Ohms in Nexperia parts) provides better voltage stability under load changes. Higher impedance (30 Ohms) is acceptable in applications with stable load conditions. Impedance differences do not prevent substitution if power and voltage specifications are met.
Q: Is BZX84J-B15,115 compatible with MM5Z15VT1G? A: BZX84J-B15,115 has identical Zener voltage (15 V) and superior tolerance (±2% versus ±5%). However, it uses SOD-323F package instead of SOD-523, requiring PCB layout modification. Electrical performance is compatible, but physical redesign is necessary.
Q: What does AEC-Q100 and AEC-Q101 qualification mean? A: AEC-Q100 and AEC-Q101 are automotive industry reliability standards. AEC-Q100 applies to discrete semiconductors, and AEC-Q101 applies to optoelectronic devices. Parts carrying these qualifications meet automotive temperature cycling, thermal shock, and reliability requirements. Selection of qualified parts is mandatory for automotive applications.
Q: Can CZRU52C15 replace MM5Z15VT1G? A: CZRU52C15 is suitable only for applications where maximum power dissipation does not exceed 150 mW. The main part is rated at 500 mW. Additionally, CZRU52C15 uses 0603/SOD-523F package format, which differs from SOD-523. Operating temperature range is also reduced (-55°C to 125°C versus -65°C to 150°C). Verify all application requirements before substitution.
Q: What is the impact of ±2% tolerance versus ±5% tolerance? A: ±2% tolerance provides tighter Zener voltage accuracy. For a 15 V part, ±5% tolerance allows 14.25 V to 15.75 V variation, while ±2% tolerance allows 14.7 V to 15.3 V variation. Applications requiring precise voltage regulation benefit from ±2% parts. Standard applications typically accept ±5% tolerance.
Q: Are all substitute parts ROHS3 compliant? A: Yes, all parts listed in this reference are ROHS3 compliant and REACH unaffected. Compliance status is identical across all substitute options.
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