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Nexperia USA Inc. SZMM3Z4V7T1GX
- Part No.:
- SZMM3Z4V7T1GX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z4V7T1GX.pdf
- Description:
- DIODE ZENER 4.7V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:52,561
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Product details
Overview
SZMM3Z4V7T1GX from Nexperia is a Zener voltage regulator diode in SOD323 (SC-76) package, rated for 4.42 V to 4.90 V nominal Zener voltage at 5 mA, with 2.0 Ω differential resistance, ±5 % tolerance, and AEC-Q101 qualification for automotive use in power rail clamping and reference circuits.
For engineers reviewing the SZMM3Z4V7T1GX datasheet, SZMM3Z4V7T1GX pinout, SZMM3Z4V7T1GX application, or SZMM3Z4V7T1GX equivalent, this part supports precision low-voltage regulation in space-constrained automotive ECUs, sensor signal conditioning, and 5 V rail stabilization where thermal stability and surge immunity are critical.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. It features a low 2.0 Ω differential resistance at IZ = 5 mA and a temperature coefficient of −3.5 mV/K to 0.2 mV/K, enabling predictable drift behavior in ambient ranges from −55 °C to +150 °C.
Designed for transient suppression and DC voltage reference, it delivers non-repetitive peak reverse power dissipation up to 40 W (tp = 100 µs), while sustaining continuous operation at ≤300 mW total power dissipation on FR4 PCB with standard footprint - validated per IEC 60134 absolute maximum ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.42 V to 4.90 V at IZ = 5 mA - defines regulated output voltage window for 5 V system references |
| Differential Resistance (rdiff) | 2.0 Ω at IZ = 5 mA - ensures minimal output voltage variation under load current changes |
| Tolerance | ±5 % - enables predictable binning for production calibration without post-manufacture trimming |
| Forward Voltage (VF) | 1.1 V at IF = 100 mA - limits conduction loss during forward-biased fault conditions |
| Non-repetitive Peak Power (PZSM) | 40 W (tp = 100 µs) - provides robust ESD/surge immunity per ISO 10605 and IEC 61000-4-2 |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets thermal design boundary for PCB copper area and airflow requirements |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation in under-hood automotive environments without derating |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package with 2 leads, 1.35 mm × 0.85 mm footprint, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker determines reverse-bias orientation for Zener operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for controlled breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22-A114 |
| Low differential resistance | 2.0 Ω at 5 mA enables <10 mV output shift over ±10 mA load variation in feedback loops |
| Wide working voltage range | Part of 37-type series spanning 2.4 V–75 V - allows single-source procurement across multiple board designs |
| Small SOD323 footprint | 1.35 mm × 0.85 mm saves >60 % board area vs. DO-35 or SOD123 packages in high-density layouts |
| Thermal resistance (j-a) | 415 K/W in free air - informs minimum copper pour area (≥25 mm²) for 300 mW continuous operation |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Stabilizing 5 V reference for LIN transceiver and microcontroller I/O supply in BCM PCBs exposed to load dump transients. IC Role / Device Role / Timing Role: Zener clamp protecting downstream ICs from overvoltage events while maintaining accurate bias for analog comparators. Use Value: Withstands 40 W surge pulses and maintains ±5 % regulation tolerance across −40 °C to +125 °C ambient, eliminating need for external TVS in cost-sensitive designs. |
Use Scenario: Providing stable 4.7 V reference for 12-bit ADC inputs measuring 4–20 mA loop current in factory automation sensors. IC Role / Device Role / Timing Role: Precision shunt reference establishing known voltage threshold for ratiometric conversion and offset correction. Use Value: Low 2.0 Ω rdiff and −3.5 to +0.2 mV/K tempco ensure <±0.5 % full-scale error over industrial temperature range without active compensation. |
| USB-C Power Delivery Interface | Consumer IoT Battery Monitoring |
|
Use Scenario: Clamping VBUS line during hot-plug events in USB-C PD sink controllers to prevent overvoltage damage to PMIC inputs. IC Role / Device Role / Timing Role: Fast-response shunt limiter absorbing short-duration surges before protection ICs activate. Use Value: 40 W non-repetitive rating handles 100 µs ESD pulses per IEC 61000-4-2 Level 4, reducing reliance on larger, slower TVS diodes. |
Use Scenario: Regulating reference voltage for fuel gauge ICs monitoring Li-ion cell voltage in smart wearables with tight space constraints. IC Role / Device Role / Timing Role: Compact voltage reference enabling accurate state-of-charge estimation in ultra-thin form factors. Use Value: SOD323 package fits within 1.5 mm × 1.0 mm PCB real estate budget while delivering ±5 % accuracy at 5 mA, matching battery monitor input requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V7,115 (Nexperia) | Same Zener voltage (4.7 V), but SOD323 package with tighter ±2 % tolerance and higher 500 mW Ptot | Preferred for high-accuracy reference designs requiring <±20 mV drift; not AEC-Q101 qualified | Select when tighter voltage tolerance outweighs automotive qualification needs |
| MMSZ4704T1G (ON Semiconductor) | 4.7 V nominal, ±5 % tolerance, SOD123 package, 500 mW Ptot, no AEC-Q101 certification | Larger footprint (2.7 mm × 1.6 mm) limits use in ultra-dense layouts; higher thermal resistance (500 K/W) | Choose only if legacy SOD123 footprint compatibility is mandatory and automotive qualification is not required |
Compared with BZX384-B4V7,115 and MMSZ4704T1G, SZMM3Z4V7T1GX uniquely combines AEC-Q101 qualification, SOD323 miniaturization, and 40 W surge capability - making it the sole option for automotive-grade 4.7 V regulation in space- and reliability-critical applications.
Availability
SZMM3Z4V7T1GX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, USB-C power delivery protection, and consumer IoT battery monitoring requiring stable component supply across extended temperature and surge conditions.
Supply support for SZMM3Z4V7T1GX 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.
SZMM3Z4V7T1GX belongs to the SZMM3Z series of AEC-Q101-qualified Zener diodes designed specifically for precision voltage regulation and transient protection in automotive electronics and industrial systems operating under harsh thermal and electrical stress.
FAQ
What is the maximum continuous reverse current this Zener diode can sustain?
The SZMM3Z4V7T1GX is rated for total power dissipation of 300 mW at 25 °C ambient on FR4 PCB. At its nominal Zener voltage of ~4.7 V, this corresponds to a maximum continuous reverse current of approximately 64 mA (300 mW ÷ 4.7 V). Derating is required above 25 °C per the 415 K/W junction-to-ambient thermal resistance.
Does this device require a series current-limiting resistor in typical Zener regulator configurations?
Yes - a series resistor is mandatory to limit reverse current to safe levels. For example, when regulating a 12 V supply to ~4.7 V, a 120 Ω resistor limits worst-case current to ~61 mA at 25 °C, staying within the 300 mW power limit and avoiding thermal runaway. Resistor value must be selected based on input voltage range, load current, and ambient temperature.
How does the temperature coefficient affect regulation accuracy over automotive temperature ranges?
At 4.7 V, the temperature coefficient ranges from −3.5 mV/K to +0.2 mV/K. Over −40 °C to +125 °C (165 K span), this produces a worst-case Zener voltage shift of ±578 mV - but actual drift is typically bounded by the ±5 % initial tolerance (±235 mV). Combined effect remains within ±0.8 % of nominal voltage, meeting most automotive reference requirements without active compensation.
Can this Zener diode be used in forward-biased applications such as LED driver current sensing?
No - the SZMM3Z4V7T1GX is optimized for reverse-bias Zener operation. Its forward voltage is specified only up to 1.1 V at 100 mA (pulse test), with no guaranteed performance or reliability in sustained forward conduction. For forward-bias sensing, dedicated Schottky or signal diodes with characterized forward characteristics should be used instead.
SZMM3Z4V7T1GX 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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 1 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
SZMM3Z4V7T1GX FAQ
1.How can I place an order for SZMM3Z4V7T1GX through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z4V7T1GX 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 SZMM3Z4V7T1GX reliable?
The price and inventory of SZMM3Z4V7T1GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z4V7T1GX is usually 5 days.
3.What payment methods are accepted for SZMM3Z4V7T1GX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z4V7T1GX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z4V7T1GX?
SZMM3Z4V7T1GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z4V7T1GX 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 SZMM3Z4V7T1GX?
For technical support, including SZMM3Z4V7T1GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z4V7T1GX requirements.
6.How does Aetrix verify that SZMM3Z4V7T1GX is sourced from the original manufacturer or authorized distributors?
All SZMM3Z4V7T1GX 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 SZMM3Z4V7T1GX meets industry standards.
7.What is the process for return or replacement of SZMM3Z4V7T1GX?
All SZMM3Z4V7T1GX units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z4V7T1GX, 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 SZMM3Z4V7T1GX part is unused and in its original packaging.
Return procedure for SZMM3Z4V7T1GX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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