My Inquiry
My Account
onsemi SZMM5Z20VT5G
- Part No.:
- SZMM5Z20VT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z20VT5G.pdf
- Description:
- DIODE ZENER 20V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:8,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZMM5Z20VT5G from onsemi is a 20 V, ±5% tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 55 Ω maximum Zener impedance at 5 mA test current and 0.05 μA reverse leakage at 14 V, used for precision voltage regulation and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMM5Z20VT5G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (250 °C/W), ESD rating (>16 kV HBM), AEC-Q101 qualification, and SOD-523 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at nominal 20 V with tight 18.8–21.2 V range. Its low 0.7 mm body height and 1.20 mm × 0.80 mm outline enable integration into ultra-thin mobile devices.
Designed for stable regulation under transient conditions, it delivers 55 Ω dynamic impedance at IZT = 5 mA and maintains <0.05 μA leakage at VR = 14 V, supporting low-power biasing and reference functions in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V nominal, 18.8–21.2 V min/max at IZT = 5 mA - defines precise clamping threshold for protection circuits |
| Power Rating (PD) | 500 mW at TA = 25 °C - sets maximum continuous dissipation before thermal derating begins |
| Zener Impedance (ZZT) | 55 Ω max at IZT = 5 mA - determines regulation stiffness and output voltage variation under load changes |
| Reverse Leakage (IR) | 0.05 μA max at VR = 14 V - ensures minimal standby current in always-on voltage monitor paths |
| ESD Rating | >16 kV per Human Body Model - provides robust handling safety without external protection in assembly lines |
| Temperature Range | −65 °C to +150 °C - supports operation in automotive under-hood and industrial ambient environments |
| Package | SOD-523 (1.20 mm × 0.80 mm × 0.70 mm) - enables placement on 0.5 mm pitch PCBs with minimal board area usage |
Pinout & Package
SOD-523 surface-mount package with cathode marked by polarity band; 2-terminal configuration optimized for compact layout and automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased during Zener operation to sink current and clamp voltage |
| 2 (Unbanded End) | Anode | Connected to ground or lower-potential rail; completes current path during breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including infotainment power rails and sensor interface protection |
| Pb-Free & RoHS Compliant | Enables compliance with global environmental regulations and lead-free reflow soldering at 260 °C |
| Low Profile (0.7 mm height) | Permits stacking beneath shields or integration into slim handheld enclosures without mechanical interference |
| MSL 1 Rating | Zero floor life limitation - no baking required prior to assembly, reducing manufacturing overhead |
| 100% Matte Tin Lead Finish | Ensures reliable solder wetting and intermetallic formation during reflow, minimizing voiding risk |
Applications
| Smartphone Power Management | Automotive Cabin Controller |
|---|---|
Use Scenario: Regulating auxiliary 20 V rail for camera module flash IC and RF front-end biasing in LTE/5G handsets. IC Role / Device Role / Timing Role: Zener voltage clamp protecting downstream LDO inputs from transient overvoltage during hot-swap events. Use Value: Prevents latch-up in 28 nm process ICs by limiting input voltage to ≤21.2 V while consuming only 0.05 μA quiescent current. | Use Scenario: Providing stable 20 V reference for CAN transceiver bias and microcontroller ADC calibration in HVAC control units. IC Role / Device Role / Timing Role: Precision shunt reference maintaining voltage accuracy across −40 °C to +125 °C operating range. Use Value: Enables <±0.5% system-level voltage measurement accuracy despite 14.4–16.0 V vehicle battery fluctuations. |
| Wearable Health Monitor | Industrial IoT Sensor Node |
Use Scenario: Overvoltage protection for lithium-polymer battery charging circuitry in compact fitness trackers. IC Role / Device Role / Timing Role: Fail-safe clamping element absorbing surge energy during USB-C adapter plug-in transients. Use Value: Withstands >16 kV HBM ESD without degradation, eliminating need for discrete TVS diodes and saving 0.5 mm² board area. | Use Scenario: Voltage stabilization for LoRaWAN sub-GHz radio power amplifier supply in edge-deployed environmental sensors. IC Role / Device Role / Timing Role: Low-impedance shunt regulator compensating for line drop across long PCB traces feeding RF stages. Use Value: Maintains <100 mV output deviation under 10–50 mA load steps due to 55 Ω Zener impedance and 500 mW power headroom. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C20LT1G | Same 20 V nominal, ±5% tolerance, but SOT-23 package (2.9 mm × 1.3 mm) - 3.6× larger footprint | Higher thermal mass allows 625 mW dissipation, but incompatible with ultra-dense layouts requiring SOD-523 | Select when higher power margin is needed and board space permits larger package |
| MMSZ5242BT1G | 20 V nominal, ±5% tolerance, SOD-123 package (3.7 mm × 1.6 mm) - 7.7× larger footprint, 500 mW rating | Lower Zener impedance (30 Ω) improves regulation, but MSL 3 rating requires moisture-sensitive handling | Select when tighter voltage regulation is prioritized over miniaturization and moisture control |
Compared with BZX584C20LT1G and MMSZ5242BT1G, SZMM5Z20VT5G uniquely combines AEC-Q101 qualification, SOD-523 miniaturization, and MSL 1 handling - making it optimal for automotive and portable designs where footprint, reliability, and manufacturability are jointly constrained.
Availability
SZMM5Z20VT5G is available at Aetrix Electronics and suitable for smartphone power management, automotive cabin controllers, and wearable health monitors requiring stable component supply with guaranteed long-term continuity.
Supply support for SZMM5Z20VT5G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
SZMM5Z20VT5G belongs to the MM5Z/SZMM5Z series of miniature Zener regulators designed specifically for space-constrained, high-reliability voltage reference and overvoltage protection in portable and automotive electronics.
FAQ
What is the Zener voltage tolerance of SZMM5Z20VT5G?
SZMM5Z20VT5G has a standard tolerance of ±5%, with a specified Zener voltage range of 18.8 V to 21.2 V at 5 mA test current (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet (Rev. 19, April 2025), and applies directly to the SZMM5Z20VT5G variant as part of the SZMM5ZxxxT5G automotive-qualified series.
Is SZMM5Z20VT5G qualified for automotive use?
Yes, SZMM5Z20VT5G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and control change requirements, and the device meets all stress testing and reliability standards defined in AEC-Q101 for discrete semiconductors.
What is the maximum power dissipation for SZMM5Z20VT5G at 85 °C ambient?
At 85 °C ambient temperature, SZMM5Z20VT5G's maximum power dissipation is 260 mW. This is calculated using the derating factor of 4.0 mW/°C from the 500 mW rating at 25 °C: 500 mW − (85 − 25) × 4.0 mW = 260 mW. This value is documented in the "Maximum Ratings" table under PD derating.
Does SZMM5Z20VT5G have a Pb-free and RoHS-compliant construction?
Yes, SZMM5Z20VT5G is Pb-free and RoHS compliant, as confirmed in the "Specification Features" section of the onsemi datasheet. The device uses 100% matte tin lead finish and thermosetting plastic encapsulation meeting UL 94 V-0, and carries the "G" suffix denoting Pb-free packaging per onsemi's standard nomenclature.
What is the reverse leakage current specification for SZMM5Z20VT5G at 14 V?
The reverse leakage current for SZMM5Z20VT5G is specified as ≤0.05 μA at VR = 14 V and TA = 25 °C. This parameter is listed in the "ELECTRICAL CHARACTERISTICS − Standard Tolerance Series" table on page 3 of the datasheet under the IR @ VR column for the 20 V device row.
SZMM5Z20VT5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
SZMM5Z20VT5G FAQ
1.How can I place an order for SZMM5Z20VT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z20VT5G 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 SZMM5Z20VT5G reliable?
The price and inventory of SZMM5Z20VT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z20VT5G is usually 5 days.
3.What payment methods are accepted for SZMM5Z20VT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z20VT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z20VT5G?
SZMM5Z20VT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z20VT5G 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 SZMM5Z20VT5G?
For technical support, including SZMM5Z20VT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z20VT5G requirements.
6.How does Aetrix verify that SZMM5Z20VT5G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z20VT5G 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 SZMM5Z20VT5G meets industry standards.
7.What is the process for return or replacement of SZMM5Z20VT5G?
All SZMM5Z20VT5G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z20VT5G, 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 SZMM5Z20VT5G part is unused and in its original packaging.
Return procedure for SZMM5Z20VT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMM5Z20VT5G Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
