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onsemi SZMM3Z47VT1G
- Part No.:
- SZMM3Z47VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z47VT1G.pdf
- Description:
- DIODE ZENER 47V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:39,644
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Product details
Overview
SZMM3Z47VT1G from onsemi is a 47 V ±3% Zener voltage regulator diode in SOD−323 package, rated for 300 mW steady-state power dissipation at 25°C, with 170 Ω maximum dynamic impedance at 2 mA test current and 0.05 μA reverse leakage at 32.9 V. It serves as a precision voltage reference or overvoltage clamp in space-constrained portable electronics.
For engineers reviewing the SZMM3Z47VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 47 V nominal Zener voltage tolerance, low-profile 1.7 mm × 1.25 mm footprint, AEC−Q101 qualification for automotive use, and ESD robustness (>16 kV HBM).
Technical Context
This device operates as a two-terminal, unidirectional voltage reference, conducting in reverse breakdown to maintain stable voltage across load variations. Its thermal resistance (RJA = 416°C/W) and derating curve define safe operating limits up to +150°C junction temperature.
The Zener voltage exhibits a positive temperature coefficient of +0.2 mV/°C (typical), and capacitance is 40 pF at 0 V bias and 1 MHz - critical for noise-sensitive analog sensing and RF bypass applications where parasitic coupling must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44 V min / 47 V nom / 50 V max @ IZT = 2 mA - defines regulation window for precision clamping or reference generation |
| Power Dissipation | 300 mW @ TA = 25°C - sets maximum continuous DC or pulsed power handling on FR-4 board |
| Zener Impedance | 170 Ω max @ IZT = 2 mA - determines output voltage stability under varying load current |
| Reverse Leakage | 0.05 μA max @ VR = 32.9 V - ensures minimal standby current in battery-powered systems |
| Capacitance | 40 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency filtering and signal integrity in RF front-ends |
| ESD Rating | Class 3 (>16 kV) per HBM - enables direct handling and integration into ESD-prone consumer assemblies without added protection |
| Operating Temp | −65°C to +150°C - supports under-hood automotive and industrial environments requiring wide thermal margin |
Pinout & Package
SZMM3Z47VT1G is housed in a Pb-free SOD−323 surface-mount plastic package (Case 477, Style 1), measuring 1.7 mm × 1.25 mm × 0.9 mm with cathode polarity indicated by a band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased terminal | Connected to regulated voltage node; carries reverse current during Zener conduction |
| 2 (Anode) | Reference/ground terminal | Tied to system ground or lower-potential rail; completes Zener current path |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock testing |
| Pb-free construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile requirements |
| Low-profile SOD−323 | Enables placement on dense PCBs where height clearance <0.9 mm is mandatory (e.g., foldable displays, wearables) |
| High ESD immunity | Withstands >16 kV human-body-model discharge without parameter shift - reduces need for external TVS devices |
| Stable tempco | +0.2 mV/°C typical drift minimizes calibration drift in temperature-varying sensor reference circuits |
Applications
| Automotive Body Control Module | Smartphone Power Management |
|---|---|
|
Use Scenario: Voltage reference for microcontroller ADC input scaling in door module LIN bus interface. IC Role / Device Role / Timing Role: Provides stable 47 V reference for high-side current sense amplifier biasing and fault detection threshold setting. Use Value: Enables accurate current measurement across −40°C to +125°C ambient using only one passive component, reducing BOM count vs. active reference ICs. |
Use Scenario: Overvoltage clamp on USB-C power delivery (PD) negotiation line. IC Role / Device Role / Timing Role: Shunts transient surges above 50 V to protect PD controller GPIO pins during hot-plug events. Use Value: Prevents latch-up or permanent damage to 3.3 V logic inputs while occupying <2.1 mm² PCB area - critical for thin-profile handset designs. |
| Industrial IoT Sensor Node | Medical Portable Monitor |
|
Use Scenario: Reference voltage source for isolated 4–20 mA loop transmitter DAC output stage. IC Role / Device Role / Timing Role: Sets precise full-scale output voltage for current-loop calibration against traceable standards. Use Value: Maintains ±3% regulation accuracy over 10-year field life without recalibration, meeting IEC 61000-4-5 surge immunity requirements. |
Use Scenario: ESD protection and bias stabilization for photoplethysmography (PPG) LED driver supply rail. IC Role / Device Role / Timing Role: Clamps ESD transients on LED anode while maintaining constant forward bias for optical pulse consistency. Use Value: Eliminates signal distortion during clinical-grade heart-rate measurements by limiting voltage excursions to ≤50 V with sub-μA leakage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B47,115 (Nexperia) | Same 47 V nominal Zener, but 200 mW rating and 250 Ω ZZT @ 5 mA - higher impedance and lower power headroom | Not AEC−Q101 qualified; limited to commercial-grade portable equipment | Select when cost sensitivity outweighs automotive compliance and tighter regulation stability |
| MMSZ47ET1G (onsemi) | Identical electrical specs and AEC−Q101 rating, but in larger SOD-123 package (2.7 mm × 1.6 mm) | Requires 2.3× more PCB area; unsuitable for ultra-dense layouts like wearable PCBs | Select when thermal margin is prioritized over footprint, or when existing SOD-123 land patterns are fixed |
Compared with BZX384-B47,115 and MMSZ47ET1G, SZMM3Z47VT1G uniquely delivers automotive-grade reliability, 300 mW power capability, and minimal 1.7 mm × 1.25 mm footprint - making it optimal for next-generation compact, safety-critical embedded systems where space, stability, and qualification converge.
Availability
SZMM3Z47VT1G is available at Aetrix Electronics and suitable for automotive body control modules, smartphone power management circuits, industrial IoT sensor nodes, and medical portable monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SZMM3Z47VT1G 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
onsemi (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
SZMM3Z47VT1G belongs to the MM3ZxxxT1G/SZMM3ZxxxT1G series - engineered specifically for high-density, space-constrained voltage regulation and ESD protection in automotive and portable electronics.
FAQ
What is the Zener voltage tolerance of SZMM3Z47VT1G?
SZMM3Z47VT1G has a Zener voltage range of 44 V (minimum) to 50 V (maximum) at 2 mA test current, corresponding to a ±3% tolerance around the nominal 47 V value. This tolerance is guaranteed across the full operating temperature range of −65°C to +150°C and is verified per AEC−Q101 stress testing protocols.
Is SZMM3Z47VT1G suitable for automotive applications?
Yes, SZMM3Z47VT1G is AEC−Q101 qualified and PPAP capable, with the "SZ" prefix indicating automotive-specific process controls, site traceability, and enhanced reliability validation. It meets stringent requirements for under-hood and cabin electronics, including thermal cycling, humidity resistance, and mechanical shock endurance.
What is the maximum reverse leakage current for SZMM3Z47VT1G?
The maximum reverse leakage current for SZMM3Z47VT1G is 0.05 μA at a reverse voltage of 32.9 V and ambient temperature of 25°C. This ultra-low leakage supports multi-year battery life in always-on sensor nodes and ensures minimal loading on high-impedance reference circuits.
Can SZMM3Z47VT1G replace older through-hole Zener diodes in new designs?
SZMM3Z47VT1G is not a drop-in replacement for through-hole Zeners due to its SOD−323 surface-mount package and different thermal characteristics. However, it can functionally replace them in new PCB layouts where space constraints and automated assembly justify the transition to 1.7 mm × 1.25 mm footprint and reflow-compatible Pb-free construction.
What is the thermal resistance (RJA) of SZMM3Z47VT1G?
The thermal resistance from junction to ambient (RJA) for SZMM3Z47VT1G is 416°C/W on a standard FR-4 board with 1 cm² copper pad. This value governs power derating above 25°C - for example, at 85°C ambient, maximum allowable power drops to approximately 175 mW to maintain safe junction temperature.
SZMM3Z47VT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±6%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
SZMM3Z47VT1G FAQ
1.How can I place an order for SZMM3Z47VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z47VT1G 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 SZMM3Z47VT1G reliable?
The price and inventory of SZMM3Z47VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z47VT1G is usually 5 days.
3.What payment methods are accepted for SZMM3Z47VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z47VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z47VT1G?
SZMM3Z47VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z47VT1G 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 SZMM3Z47VT1G?
For technical support, including SZMM3Z47VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z47VT1G requirements.
6.How does Aetrix verify that SZMM3Z47VT1G is sourced from the original manufacturer or authorized distributors?
All SZMM3Z47VT1G 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 SZMM3Z47VT1G meets industry standards.
7.What is the process for return or replacement of SZMM3Z47VT1G?
All SZMM3Z47VT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z47VT1G, 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 SZMM3Z47VT1G part is unused and in its original packaging.
Return procedure for SZMM3Z47VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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