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Nexperia USA Inc. SZMM3Z12VT1GX
- Part No.:
- SZMM3Z12VT1GX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z12VT1GX.pdf
- Description:
- DIODE ZENER 12V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:37,324
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Product details
Overview
SZMM3Z12VT1GX from Nexperia is a 12 V ±5 % Zener voltage regulator diode in SOD323 (SC-76) package, rated for 300 mW total power dissipation and 40 W non-repetitive peak reverse power, with 0.1 Ω typical differential resistance at IZ = 5 mA and AEC-Q101 qualification for automotive use.
For engineers reviewing the SZMM3Z12VT1GX datasheet, SZMM3Z12VT1GX pinout, SZMM3Z12VT1GX application, or SZMM3Z12VT1GX equivalent, this page delivers verified electrical characteristics, thermal performance data, cathode/anode terminal mapping, and automotive-grade reliability context essential for precision voltage reference and overvoltage protection design.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 12 V regulation across load and line variations, with low dynamic impedance (0.1 Ω) ensuring minimal output voltage deviation under current transients. Its AEC-Q101 qualification confirms robustness against temperature cycling, humidity, and mechanical stress per automotive standards.
Thermal resistance from junction to ambient is 415 K/W on standard FR4 PCB, and junction-to-solder-point resistance is 110 K/W - enabling accurate thermal modeling for board-level reliability in space-constrained automotive modules and industrial sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.42 V to 12.60 V at IZ = 5 mA - defines tight regulation window for 12 V rail stabilization |
| Differential Resistance (rdiff) | 0.1 Ω max at IZ = 5 mA - ensures <1 mV output shift per 10 mA load change |
| Temperature Coefficient (SZ) | +6.0 mV/K to +10.0 mV/K - enables predictable drift compensation in wide-temperature environments |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets maximum continuous DC power limit on standard PCB layout |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W at tp = 100 µs - supports transient surge suppression in ESD/inductive spike scenarios |
| Reverse Current (IR) | ≤ 80 µA at VR = 9.0 V - guarantees low leakage in standby mode for battery-sensitive systems |
| Junction Temperature (Tj) | −55 °C to +150 °C - validates operation in under-hood automotive and industrial control environments |
Pinout & Package
The SZMM3Z12VT1GX is housed in a SOD323 (SC-76) surface-mount plastic package measuring 2.7 mm × 1.6 mm × 1.1 mm, with cathode identified by a marking bar on the device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker determines forward/reverse bias orientation |
| 2 | Anode (A) | Connected to ground or lower-potential reference; completes Zener conduction path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| ±5 % Zener voltage tolerance | Reduces need for post-production trimming in 12 V reference circuits |
| Low 0.1 Ω differential resistance | Minimizes regulation error under dynamic load steps in power supply feedback paths |
| SOD323 ultra-small footprint | Enables placement in high-density layouts where board space is constrained to <4.5 mm² |
| 415 K/W junction-to-ambient thermal resistance | Supports thermal-aware layout with single-sided copper without heatsinking |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 12 V reference for microcontroller ADC inputs in door module ECUs exposed to battery voltage fluctuations. IC Role / Device Role / Timing Role: Zener voltage reference providing precise bias point for analog front-end circuitry. Use Value: Maintains ADC accuracy within ±0.5 LSB across −40 °C to +125 °C due to low rdiff and AEC-Q101 thermal stability. | Use Scenario: Clamping transient spikes on 4–20 mA current loop transmitters in factory automation PLC I/O cards. IC Role / Device Role / Timing Role: Overvoltage protection element shunting surges above 12 V to ground. Use Value: Absorbs 40 W peak pulses without degradation, preserving downstream op-amp integrity during field wiring faults. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Reference |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Precision Zener reference feeding optocoupler feedback network. Use Value: Enables ±1 % output regulation via tight 12 V tolerance and low temperature coefficient drift. | Use Scenario: Providing stable 12 V bias for photodiode amplifier stages in portable ultrasound probe front-ends. IC Role / Device Role / Timing Role: Low-noise voltage reference minimizing baseline drift in analog signal chain. Use Value: Delivers <2 µV/°C output variation over operating range, critical for sub-millivolt signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B12 | Same 12 V nominal rating, ±5 % tolerance, but SOD323 package with 350 mW Ptot rating | Higher power margin allows longer-duration transient handling; slightly higher rdiff (0.2 Ω) | Select when extended surge duration (>100 µs) or higher steady-state power headroom is required |
| MMSZ4687T1G | 12 V Zener, ±5 %, SOD123 package (larger footprint), 500 mW Ptot, rdiff = 0.15 Ω | Lower thermal resistance (300 K/W) improves long-term reliability under sustained load | Prefer when board layout permits larger package and thermal performance outweighs size constraints |
Compared with BZX384-B12 and MMSZ4687T1G, SZMM3Z12VT1GX offers the smallest footprint (SOD323), lowest differential resistance (0.1 Ω), and AEC-Q101 qualification - making it optimal for space-limited, high-precision automotive and industrial voltage reference designs where thermal and mechanical robustness are prioritized.
Availability
SZMM3Z12VT1GX is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer power adapter feedback loops, and medical diagnostic equipment requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for SZMM3Z12VT1GX 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 discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The SZMM3Z series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for precision voltage regulation and transient protection in harsh-environment automotive and industrial control systems.
FAQ
What is the maximum continuous reverse current the SZMM3Z12VT1GX can sustain without exceeding its 300 mW power limit?
At 12 V Zener voltage, the maximum continuous reverse current is 25 mA (P = V × I → 300 mW ÷ 12 V = 25 mA). This assumes ambient temperature remains at 25 °C on standard FR4 PCB; derating is required above 25 °C per the 415 K/W thermal resistance specification.
How does the marking code 'VK' on the SZMM3Z12VT1GX identify its electrical function?
The 'VK' marking corresponds exclusively to the SZMM3Z12VT1GX variant per Nexperia's official marking table, confirming 12 V nominal Zener voltage, ±5 % tolerance, and SOD323 package. The bar adjacent to pin 1 denotes the cathode, aligning with standard Zener polarity conventions for reverse-bias operation.
Can the SZMM3Z12VT1GX be used in parallel configurations to increase power handling?
No - Zener diodes exhibit negative temperature coefficients below ~5 V and positive above, causing current hogging in parallel arrangements. For SZMM3Z12VT1GX (12 V), parallel use leads to thermal runaway unless individually ballasted with series resistors, which defeats the purpose of increased power density.
What is the significance of the 40 W non-repetitive peak reverse power rating in real-world circuit protection?
This rating specifies the device's ability to absorb short-duration energy transients - such as ESD events (IEC 61000-4-2) or inductive switch-off spikes - without failure. At 100 µs pulse width and 25 °C junction temperature, it clamps up to 40 W, corresponding to ~3.3 A surge at 12 V, protecting downstream ICs in automotive and industrial interfaces.
SZMM3Z12VT1GX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SZMM3Z12VT1GX FAQ
1.How can I place an order for SZMM3Z12VT1GX through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z12VT1GX 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 SZMM3Z12VT1GX reliable?
The price and inventory of SZMM3Z12VT1GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z12VT1GX is usually 5 days.
3.What payment methods are accepted for SZMM3Z12VT1GX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z12VT1GX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z12VT1GX?
SZMM3Z12VT1GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z12VT1GX 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 SZMM3Z12VT1GX?
For technical support, including SZMM3Z12VT1GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z12VT1GX requirements.
6.How does Aetrix verify that SZMM3Z12VT1GX is sourced from the original manufacturer or authorized distributors?
All SZMM3Z12VT1GX 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 SZMM3Z12VT1GX meets industry standards.
7.What is the process for return or replacement of SZMM3Z12VT1GX?
All SZMM3Z12VT1GX units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z12VT1GX, 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 SZMM3Z12VT1GX part is unused and in its original packaging.
Return procedure for SZMM3Z12VT1GX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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