MM3Z30VT1GX Equivalent & Substitute Parts

Part Overview

The MM3Z30VT1GX is a Zener diode voltage regulator manufactured by Nexperia USA Inc., classified as a surface mount component in the SOD-323 package. This 30 V, 300 mW Zener diode is designed for voltage regulation and protection applications requiring stable reference voltages. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set, enabling design flexibility and supply chain continuity.

Substiute Parts

MM3Z30VT1GX

Nexperia USA Inc.In Stock: 3740MM3Z30VT1GX Datasheet

Current PartRFQ

BZX384-A30-QX

Nexperia USA Inc.In Stock: 3788BZX384-A30-QX Datasheet

Parametric EquivalentRFQ

SZMM3Z30VT1GX

Nexperia USA Inc.In Stock: 27359SZMM3Z30VT1GX Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MM3Z30VT1GX are qualified based on the following critical parameters:

Electrical Equivalence Criteria:

• Voltage - Zener (Nominal): 30 V (exact match required)
• Power - Maximum: 300 mW (exact match required)
• Impedance (Maximum): 80 Ohms (exact match required)
• Current - Reverse Leakage @ 21 V: 50 nA (exact match required)
• Operating Temperature: 150°C (exact match required)

Mechanical Compatibility Criteria:

• Package / Case: SC-76, SOD-323 (exact match required)
• Mounting Type: Surface Mount (exact match required)

Compliance Criteria:

• RoHS Status: ROHS3 Compliant (required)
• Moisture Sensitivity Level: 1 (Unlimited) (required)

Tolerance variations (±5% vs. ±1%) do not disqualify substitution when all other parameters align, as tighter tolerance represents enhanced performance within the same voltage class. Forward voltage characteristics may vary between substitute parts while maintaining functional equivalence for voltage regulation applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—MM3Z30VT1GX, BZX384-A30-QX, and SZMM3Z30VT1GX—maintain Active product status with full RoHS3 compliance and identical moisture sensitivity ratings. Selection between these parts is determined by application-specific requirements:

MM3Z30VT1GX is the primary specification. Use this part when standard ±5% tolerance and standard forward voltage characteristics are acceptable for the application.

BZX384-A30-QX provides tighter ±1% Zener voltage tolerance and carries AEC-Q101 automotive qualification. This part is suitable for applications requiring enhanced voltage accuracy or automotive-grade reliability. The forward voltage specification differs (900 mV @ 10 mA vs. 1.1 V @ 100 mA), reflecting different measurement conditions rather than functional incompatibility.

SZMM3Z30VT1GX maintains ±5% tolerance matching the primary part and includes AEC-Q101 automotive qualification. This part offers automotive-grade reliability while preserving the original tolerance and forward voltage characteristics. Higher inventory availability (27,344 pcs) may support extended production runs.

All three parts are electrically and mechanically interchangeable within the specified parameter constraints. Selection should be based on tolerance requirements, automotive qualification necessity, and supply availability.

Frequently Asked Questions (FAQ)

Q: Can BZX384-A30-QX replace MM3Z30VT1GX in all applications?

A: Yes, within the specified electrical and mechanical parameters. The ±1% tolerance of BZX384-A30-QX is tighter than the ±5% tolerance of MM3Z30VT1GX, making it suitable for applications requiring higher voltage accuracy. Both parts share identical Zener voltage (30 V), maximum power (300 mW), impedance (80 Ohms), and package specifications (SOD-323).

Q: What is the difference between the forward voltage specifications?

A: Forward voltage is measured under different conditions: MM3Z30VT1GX and SZMM3Z30VT1GX are specified at 1.1 V @ 100 mA, while BZX384-A30-QX is specified at 900 mV @ 10 mA. These differences reflect measurement methodology rather than functional incompatibility. For Zener diode voltage regulation applications, the reverse-biased Zener voltage (30 V) is the primary operating parameter.

Q: Are all three parts suitable for automotive applications?

A: MM3Z30VT1GX is Active with full compliance but does not carry automotive qualification. BZX384-A30-QX and SZMM3Z30VT1GX both carry AEC-Q101 automotive qualification. For automotive applications, BZX384-A30-QX or SZMM3Z30VT1GX are the appropriate selections.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. All three parts use identical SOD-323 surface mount packaging (SC-76 case), enabling direct footprint compatibility. No PCB layout modifications are required for substitution.

Q: What does the ±5% and ±1% tolerance mean for Zener voltage?

A: Tolerance specifies the acceptable deviation from the nominal 30 V Zener voltage. MM3Z30VT1GX and SZMM3Z30VT1GX allow 30 V ± 1.5 V (28.5 V to 31.5 V). BZX384-A30-QX allows 30 V ± 0.3 V (29.7 V to 30.3 V). Tighter tolerance is beneficial for precision voltage regulation circuits.

Q: Are moisture sensitivity and RoHS compliance identical across all three parts?

A: Yes. All three parts carry MSL 1 (Unlimited) moisture sensitivity rating and ROHS3 compliance, indicating no special moisture handling requirements and full lead-free, halogen-free compliance.