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Nexperia USA Inc. SZMM3Z47VT1GX
- Part No.:
- SZMM3Z47VT1GX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z47VT1GX.pdf
- Description:
- DIODE ZENER 47V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:41,650
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Product details
Overview
SZMM3Z47VT1GX from Nexperia is a Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and overvoltage protection in low-power circuits. It delivers a nominal 47 V Zener voltage (44.0–50.0 V at IZ = 2 mA), with ±5 % tolerance, 32.9 Ω differential resistance, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SZMM3Z47VT1GX datasheet, SZMM3Z47VT1GX pinout, SZMM3Z47VT1GX application, or SZMM3Z47VT1GX equivalent, this part supports stable regulation in space-constrained automotive ECUs, industrial sensor interfaces, and power supply feedback loops where low capacitance (40 pF at 0 V) and thermal robustness (Tj ≤ 150 °C) are critical.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable reference voltage across its cathode–anode terminals under controlled current conditions. Its 47 V nominal working voltage targets mid-range regulation needs, with temperature coefficient of +42.0 to +51.8 mV/K ensuring predictable drift behavior over temperature.
Designed for surface-mount assembly on FR4 PCBs, it features low thermal resistance (Rth(j-sp) = 110 K/W to solder point) and withstands non-repetitive surges up to 40 W (100 µs square wave), making it suitable for transient suppression in 12 V/24 V automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.0 V to 50.0 V at IZ = 2 mA - defines precise regulation window for feedback or clamping |
| Differential Resistance (rdiff) | 32.9 Ω - low impedance ensures minimal voltage shift under load current variation |
| Reverse Current (IR) | ≤ 375 µA at VR = 37.6 V - guarantees low leakage in standby mode |
| Diode Capacitance (Cd) | 40 pF at f = 1 MHz, VR = 0 V - enables high-frequency noise filtering without signal distortion |
| Total Power Dissipation (Ptot) | 300 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard PCB |
| Non-repetitive Peak Power (PZSM) | 40 W for 100 µs square wave - supports short-duration surge absorption in automotive transients |
| Junction Temperature (Tj) | −55 °C to +150 °C - validated operation across full automotive ambient range |
Pinout & Package
Package: SOD323 (SC-76), ultra-compact 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; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes bias path for reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Low differential resistance | 32.9 Ω ensures <100 mV output shift across 1–5 mA Zener current range |
| Wide voltage range series | Part of 37-type family spanning 2.4 V to 75 V, enabling single-source design flexibility |
| Small SOD323 footprint | 1.35 mm × 0.85 mm body size saves board area in dense automotive control modules |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for LIN bus transceiver biasing and microcontroller ADC input scaling. IC Role / Device Role / Timing Role: Zener diode provides stable 47 V rail for high-side driver gate bias and analog front-end protection. Use Value: Enables accurate 12 V system monitoring with ±5 % regulation tolerance and low 40 pF capacitance to avoid signal integrity degradation. |
Use Scenario: Clamping and reference generation in 4–20 mA loop-powered pressure transmitter circuits. IC Role / Device Role / Timing Role: Acts as precision shunt regulator for op-amp feedback network and overvoltage limiter on analog output stage. Use Value: Maintains 47 V compliance voltage with 32.9 Ω dynamic impedance, minimizing error contribution to current-loop accuracy. |
| Power Supply Feedback Network | ESD-Protected Interface Protection |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters for automotive infotainment power supplies. IC Role / Device Role / Timing Role: Provides stable Zener reference to optocoupler LED drive circuit, setting output voltage setpoint. Use Value: Delivers tight 44–50 V regulation window with 0.05 %/°C tempco stability, improving output accuracy over −40 to +125 °C. |
Use Scenario: Low-capacitance overvoltage clamp on CAN FD physical layer lines near ECU connectors. IC Role / Device Role / Timing Role: Shunt protector absorbing fast transients while presenting only 40 pF to high-speed data lines. Use Value: Limits line voltage to ≤50 V during ISO 7637-2 pulse 1/2b events without distorting 5 Mbps CAN FD waveform integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B47,115 (Nexperia) | Same 47 V rating, SOD323 package, but ±2 % tolerance and higher 20 Ω rdiff; no AEC-Q101 listing | Preferred for non-automotive industrial designs requiring tighter voltage tolerance | Select when ±2 % VZ accuracy is mandatory and automotive qualification is not required |
| MMSZ47ET1G (ON Semiconductor) | 47 V nominal, SOD123 package (larger), ±5 % tolerance, 35 Ω rdiff, AEC-Q101 qualified | Requires larger PCB footprint; better thermal dissipation (Ptot = 500 mW) but higher Cd = 55 pF | Choose when higher power margin or legacy SOD123 layout compatibility is needed |
Compared with BZX384-B47 and MMSZ47ET1G, SZMM3Z47VT1GX uniquely balances AEC-Q101 compliance, ultra-small SOD323 footprint, and 40 pF capacitance-making it optimal for high-density automotive modules where board space and signal integrity are constrained.
Availability
SZMM3Z47VT1GX is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and power supply feedback networks requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZMM3Z47VT1GX 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.
SZMM3Z47VT1GX belongs to the SZMM3Z series of general-purpose Zener diodes engineered specifically for space-constrained automotive and industrial regulation tasks demanding AEC-Q101 reliability and tight parametric consistency.
FAQ
What is the maximum continuous Zener current for reliable operation?
The device supports up to 200 mA forward current per absolute maximum ratings, but for stable Zener regulation at 47 V, the recommended operating current is 2 mA to 10 mA. At 10 mA, power dissipation reaches 470 mW-exceeding the 300 mW total limit-so practical continuous Zener current must stay below ~6.4 mA to remain within Ptot derating limits on standard FR4 PCB.
How does the temperature coefficient affect voltage stability in automotive environments?
This diode exhibits a positive temperature coefficient of +42.0 to +51.8 mV/K at 47 V, meaning its Zener voltage increases ~2.2 V over a 50 °C junction rise. In automotive applications from −40 °C to +125 °C ambient, this results in ~4.5 V total drift-acceptable for non-critical reference roles but requires compensation in precision feedback paths.
Can SZMM3Z47VT1GX replace older MMBZ47V devices in existing designs?
Yes, with verification: both are 47 V Zeners in SOD323 packages, but SZMM3Z47VT1GX has tighter differential resistance (32.9 Ω vs typical 45 Ω), lower capacitance (40 pF vs 50 pF), and explicit AEC-Q101 qualification. Layout and solder profile are identical; confirm thermal margin given identical 300 mW Ptot.
What is the significance of the 'DS' marking code on the device body?
'DS' is the manufacturer-specific marking code for SZMM3Z47VT1GX per Nexperia's ordering table, used for visual identification on the SOD323 package. It appears adjacent to the cathode bar and corresponds exclusively to the 47 V variant-enabling quick field verification without electrical testing.
SZMM3Z47VT1GX 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):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 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
SZMM3Z47VT1GX FAQ
1.How can I place an order for SZMM3Z47VT1GX through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z47VT1GX 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 SZMM3Z47VT1GX reliable?
The price and inventory of SZMM3Z47VT1GX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z47VT1GX is usually 5 days.
3.What payment methods are accepted for SZMM3Z47VT1GX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z47VT1GX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z47VT1GX?
SZMM3Z47VT1GX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z47VT1GX 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 SZMM3Z47VT1GX?
For technical support, including SZMM3Z47VT1GX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z47VT1GX requirements.
6.How does Aetrix verify that SZMM3Z47VT1GX is sourced from the original manufacturer or authorized distributors?
All SZMM3Z47VT1GX 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 SZMM3Z47VT1GX meets industry standards.
7.What is the process for return or replacement of SZMM3Z47VT1GX?
All SZMM3Z47VT1GX units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z47VT1GX, 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 SZMM3Z47VT1GX part is unused and in its original packaging.
Return procedure for SZMM3Z47VT1GX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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