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Nexperia USA Inc. MM3Z51VT1GX
- Part No.:
- MM3Z51VT1GX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MM3Z51VT1GX.pdf
- Description:
- DIODE ZENER 51V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:2,900
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Product details
Overview
MM3Z51VT1GX from Nexperia is a 51 V ±5 % tolerance Zener diode in SOD323 (SC-76) package, designed for precision voltage regulation and reference applications with low differential resistance (≤2 Ω at IZ = 2 mA), 300 mW total power dissipation, and 40 W non-repetitive peak reverse power capability. It operates reliably across −55 °C to +150 °C ambient and serves as a stable shunt reference in power supply feedback loops.
For engineers reviewing the MM3Z51VT1GX datasheet, MM3Z51VT1GX pinout, MM3Z51VT1GX application, or MM3Z51VT1GX equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (Rth(j-a) = 415 K/W), junction temperature limit (150 °C), and cathode/anode polarity marking per SOD323 outline.
Technical Context
This Zener diode functions as a two-terminal shunt voltage regulator, maintaining a stable 51 V output across load variations by conducting reverse current when input exceeds VZ. Its low differential resistance (2.0 Ω max at IZ = 2 mA) ensures minimal voltage drift under changing bias conditions.
Thermal performance is defined by Rth(j-a) = 415 K/W (free air) and Rth(j-sp) = 110 K/W (solder point), enabling reliable operation up to 150 °C junction temperature. Reverse current remains ≤400 µA at VR = 39 V, supporting low-leakage reference designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 48.0 V to 54.0 V at IZ = 2 mA - defines regulation setpoint with ±5 % tolerance for stable reference accuracy |
| Differential Resistance (rdiff) | ≤2.0 Ω at IZ = 2 mA - ensures minimal output voltage variation under load current changes |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 µs square wave - supports transient surge suppression in protection circuits |
| Reverse Current (IR) | ≤400 µA at VR = 39 V - guarantees low leakage in high-impedance reference paths |
| Temperature Coefficient (SZ) | +35.7 mV/K - quantifies VZ drift per degree Celsius rise, critical for temperature-stable references |
| Junction Temperature (Tj) | 150 °C maximum - determines upper thermal operating limit before permanent degradation |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package with 2 leads, 1.35 mm × 0.85 mm body size, 0.45 mm lead pitch, and cathode marked by bar on terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-biased Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Low differential resistance | 2.0 Ω max at IZ = 2 mA enables tight voltage regulation under dynamic load shifts |
| Wide operating temperature range | −55 °C to +150 °C ambient allows deployment in industrial and automotive under-hood environments |
| Precision voltage tolerance | ±5 % at IZ = 2 mA supports accurate feedback in switching power supplies and ADC references |
| Small-footprint SMD package | SOD323 outline (1.35 × 0.85 mm) saves board space in compact consumer and IoT devices |
| High surge robustness | 40 W non-repetitive peak reverse power withstands ESD and line transients without failure |
Applications
| Power Supply Feedback Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in secondary-side feedback loop of isolated DC-DC converters to regulate output voltage via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 51 V threshold to error amplifier input. Use Value: Enables ±1 % output regulation accuracy with minimal component count and no external biasing. |
Use Scenario: Placed across sensitive IC inputs to clamp transient overvoltages exceeding 51 V during ESD or inductive switching events. IC Role / Device Role / Timing Role: Fast-acting shunt clamping element diverting surge current away from protected circuitry. Use Value: Limits voltage excursion to 51 V + Vf within 100 ns, preventing latch-up or gate oxide damage. |
| ADC Reference Voltage Source | Current Source Biasing Node |
Use Scenario: Supplies stable 51 V reference to high-voltage ADC front-end for battery monitoring or industrial sensor signal conditioning. IC Role / Device Role / Timing Role: Precision Zener reference establishing known voltage for analog-to-digital conversion scaling. Use Value: Delivers <10 ppm/°C effective TC when combined with series resistor compensation, improving measurement repeatability. |
Use Scenario: Biases constant-current source for LED driver or laser diode control where stable current depends on fixed reference voltage. IC Role / Device Role / Timing Role: Voltage-setting element defining current magnitude via Ohm's law through series resistor. Use Value: Maintains ±0.5 % current stability over temperature due to low rdiff and predictable VZ drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B51,115 (Nexperia) | Same 51 V nominal, ±5 %, but in smaller SOD323 variant with tighter rdiff (1.5 Ω) and lower IR (200 µA at 39 V) | Better suited for ultra-low-leakage reference designs requiring sub-µA standby current | Select when minimizing reverse leakage dominates over cost or legacy footprint compatibility |
| 1N4733A (ON Semiconductor) | 51 V nominal, ±5 %, but in DO-35 axial package with higher Ptot (1 W) and rdiff (10 Ω) | Preferred for through-hole prototyping or high-power dissipation where thermal mass matters more than size | Choose for manual assembly, high-reliability test fixtures, or where board-level rework favors axial leads |
Compared with BZX384-B51,115, MM3Z51VT1GX offers identical regulation but slightly higher leakage and differential resistance; versus 1N4733A, it delivers superior miniaturization and thermal response at lower continuous power rating.
Availability
MM3Z51VT1GX is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and precision reference applications requiring stable component supply, consistent parametric performance, and RoHS-compliant SMD sourcing.
Supply support for MM3Z51VT1GX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.
The MM3Z series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, cost-effective voltage regulation and reference functions in consumer, industrial, and computing power systems.
FAQ
What is the maximum continuous forward current for MM3Z51VT1GX?
The MM3Z51VT1GX is not rated for continuous forward conduction; its primary function is reverse-biased Zener operation. Forward voltage is specified only for test conditions: VF ≤ 1.1 V at IF = 100 mA pulse (tp ≤ 300 µs). Continuous forward current must remain below 200 mA absolute maximum, but sustained forward bias risks thermal runaway and is not recommended in design.
Can MM3Z51VT1GX be used in parallel for higher power dissipation?
No-MM3Z51VT1GX should not be paralleled due to mismatched Zener voltage tolerances (±5 %) and thermal coupling effects. Even small VZ differences cause current hogging, leading to premature failure of the lower-VZ unit. For higher power, select a single higher-rated Zener or use active regulation instead.
How does the temperature coefficient affect regulation accuracy over temperature?
With a specified temperature coefficient of +35.7 mV/K, MM3Z51VT1GX exhibits a +1.82 V shift over a 50 °C rise (e.g., 25 °C to 75 °C). This corresponds to ~3.6 % full-scale drift, making it suitable for moderate-accuracy applications; precision designs require external compensation or tighter-TC alternatives.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes-MM3Z51VT1GX's SOD323 package is qualified for lead-free reflow per J-STD-020. Recommended profile uses peak temperature ≤ 260 °C, time above liquidus 60–150 s, and ramp rates ≤ 3 °C/s. The 0.45 mm lead pitch and 1.35 mm × 0.85 mm body align with IPC-7351B standard land patterns for reliable automated assembly.
MM3Z51VT1GX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- MM3Z
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 180 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 35.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
MM3Z51VT1GX FAQ
1.How can I place an order for MM3Z51VT1GX through Aetrix?
Please submit a Request for Quotation (RFQ) for MM3Z51VT1GX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MM3Z51VT1GX reliable?
The price and inventory of MM3Z51VT1GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z51VT1GX is usually 5 days.
3.What payment methods are accepted for MM3Z51VT1GX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z51VT1GX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM3Z51VT1GX?
MM3Z51VT1GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM3Z51VT1GX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MM3Z51VT1GX?
For technical support, including MM3Z51VT1GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z51VT1GX requirements.
6.How does Aetrix verify that MM3Z51VT1GX is sourced from the original manufacturer or authorized distributors?
All MM3Z51VT1GX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MM3Z51VT1GX meets industry standards.
7.What is the process for return or replacement of MM3Z51VT1GX?
All MM3Z51VT1GX units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z51VT1GX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MM3Z51VT1GX part is unused and in its original packaging.
Return procedure for MM3Z51VT1GX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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