My Inquiry
My Account
onsemi SZMMSZ30T1G
- Part No.:
- SZMMSZ30T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ30T1G.pdf
- Description:
- DIODE ZENER 30V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,209
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZMMSZ30T1G from onsemi is a 30 V ±5% Zener voltage regulator diode in SOD−123 surface-mount package, rated for 500 mW power dissipation at 75°C, with 80 Ω maximum dynamic impedance at 2 mA test current and 0.05 μA reverse leakage at 21 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and automotive subsystems.
For engineers reviewing the SZMMSZ30T1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, AEC−Q101 qualification status, and direct alternatives for voltage regulation design-in.
Technical Context
This device operates as a two-terminal silicon Zener diode with sharp reverse breakdown at nominal 30 V, specified under 1 ms pulse conditions and measured at 2 mA (IZT1) and 0.1 mA (IZT2) test currents. Its ±5% tolerance and −55°C to +150°C junction temperature range support stable operation across automotive and industrial environments.
The SOD−123 package provides 150°C/W junction-to-lead thermal resistance and supports automated placement. ESD robustness exceeds 16 kV (HBM Class 3), and Pb−free construction complies with RoHS directives without compromising solderability or reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 28.5 V min / 30 V nom / 31.5 V max @ IZT = 2 mA - defines regulated output voltage window under standard test conditions |
| Dynamic Impedance (ZZT) | ≤80 Ω @ IZT = 2 mA - determines voltage regulation stability under small-signal AC load variations |
| Reverse Leakage (IR) | ≤0.05 μA @ VR = 21 V - ensures minimal standby current in clamping or reference configurations |
| Power Dissipation (PD) | 500 mW @ TL = 75°C, derated 6.7 mW/°C above - sets maximum continuous DC power handling on FR−5 board |
| Junction Temp Range | −55°C to +150°C - enables use in under-hood automotive, industrial control, and high-ambient environments |
| ESD Rating | Class 3 (>16 kV) per HBM - eliminates need for external ESD protection in board-level transient immunity designs |
| AEC−Q101 Qualified | Yes - validates suitability for automotive electronics requiring PPAP documentation and process control |
Pinout & Package
SOD−123 surface-mount plastic package (Case 425, 1.60 × 2.69 × 1.16 mm), cathode indicated by polarity band. Designed for reflow soldering at 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal where Zener breakdown occurs |
| 2 (Non-banded End) | Anode | Connected to circuit ground or lower-potential rail; completes bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating on FR−5 Board | Enables compact voltage reference design without heatsinking in space-constrained PCB layouts |
| AEC−Q101 Qualification | Supports automotive-grade production with documented process controls and PPAP readiness |
| 16 kV HBM ESD Robustness | Reduces risk of field failure in handling and system-level ESD events without added protection components |
| ±5% Zener Voltage Tolerance | Provides predictable regulation accuracy for feedback loops and threshold detection circuits |
| Pb−Free Construction | Meets RoHS compliance requirements while maintaining solder joint integrity and thermal performance |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for microcontroller ADC inputs monitoring battery voltage or cabin temperature sensors. IC Role / Device Role / Timing Role: Precision voltage reference providing stable 30 V bias for analog front-end scaling. Use Value: Maintains measurement accuracy across −40°C to +125°C ambient due to AEC−Q101 validation and wide TJ range. |
Use Scenario: Clamping transient overvoltage on 24 V industrial I/O lines exposed to inductive switching noise. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing surge energy before downstream ICs. Use Value: Low 0.05 μA leakage at 21 V ensures minimal quiescent current draw during normal operation. |
| Medical Portable Diagnostic Device | Consumer Smart Home Power Management |
Use Scenario: Providing isolated 30 V reference for photodiode biasing in optical blood oxygen sensing circuits. IC Role / Device Role / Timing Role: Low-noise Zener source enabling high-resolution analog signal acquisition. Use Value: 80 Ω dynamic impedance minimizes AC ripple coupling into sensitive analog signal paths. |
Use Scenario: Stabilizing auxiliary 30 V rail for Wi-Fi module power sequencing in battery-powered smart thermostats. IC Role / Device Role / Timing Role: Compact voltage supervisor ensuring clean startup and brownout recovery. Use Value: SOD−123 footprint allows integration in ultra-thin PCBs without sacrificing thermal margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ30T1G | Same electrical specs but lacks SZ prefix; not AEC−Q101 qualified or PPAP capable | Restricted to commercial/industrial use; unsuitable for automotive production | Select when AEC−Q101 compliance is unnecessary and cost sensitivity outweighs qualification requirements |
| BZX84-C30LT1G | 30 V Zener, SOT−23 package, 350 mW rating, 100 Ω ZZT, no AEC−Q101 certification | Higher dynamic impedance and lower power rating limit use in precision or high-stress environments | Choose only for non-critical, low-current reference needs where SOT−23 footprint is mandatory |
Compared with MMSZ30T1G and BZX84-C30LT1G, SZMMSZ30T1G uniquely combines AEC−Q101 qualification, 500 mW power capability, and 80 Ω ZZT in the compact SOD−123 package-making it the only option qualified for automotive-grade voltage regulation with tight thermal and reliability constraints.
Availability
SZMMSZ30T1G is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, medical diagnostic equipment, and consumer smart home power management systems requiring stable component supply and long-term lifecycle assurance.
Supply support for SZMMSZ30T1G 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.
SZMMSZ30T1G belongs to the SZMMSZxxxT1G series of AEC−Q101-qualified Zener regulators designed specifically for automotive electronics requiring enhanced process control, PPAP documentation, and extended temperature reliability.
FAQ
What is the Zener voltage tolerance for SZMMSZ30T1G?
The SZMMSZ30T1G has a nominal Zener voltage of 30 V with a standard tolerance of ±5%, resulting in a guaranteed range of 28.5 V to 31.5 V when tested at IZT = 2 mA and TA = 25°C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet.
Is SZMMSZ30T1G suitable for automotive applications?
Yes, SZMMSZ30T1G is AEC−Q101 qualified and PPAP capable, making it suitable for automotive applications including body control modules, lighting drivers, and sensor interfaces. The "SZ" prefix explicitly denotes compliance with automotive-specific site and process control requirements defined by onsemi.
What is the maximum reverse leakage current for SZMMSZ30T1G?
The maximum reverse leakage current for SZMMSZ30T1G is 0.05 μA at VR = 21 V, as specified in the Electrical Characteristics table on page 3 of the onsemi datasheet. This value is measured at TA = 25°C and confirms low standby power consumption in clamping or reference roles.
What package type does SZMMSZ30T1G use?
SZMMSZ30T1G uses the SOD−123 surface-mount package (Case 425), measuring 1.60 × 2.69 × 1.16 mm. The package features a cathode band marking, Pb−free construction, and is rated for 260°C reflow soldering for 10 seconds, as documented in the Mechanical Characteristics section of the datasheet.
How does the thermal derating of SZMMSZ30T1G work above 75°C?
SZMMSZ30T1G is rated for 500 mW power dissipation at lead temperature (TL) = 75°C, with linear derating of 6.7 mW/°C above that point. This means at 100°C TL, maximum allowable power drops to 332.5 mW. Derating is based on FR−5 board conditions and applies to continuous DC operation.
SZMMSZ30T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 21 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
SZMMSZ30T1G FAQ
1.How can I place an order for SZMMSZ30T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ30T1G 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 SZMMSZ30T1G reliable?
The price and inventory of SZMMSZ30T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ30T1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ30T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ30T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ30T1G?
SZMMSZ30T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ30T1G 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 SZMMSZ30T1G?
For technical support, including SZMMSZ30T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ30T1G requirements.
6.How does Aetrix verify that SZMMSZ30T1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ30T1G 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 SZMMSZ30T1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ30T1G?
All SZMMSZ30T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ30T1G, 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 SZMMSZ30T1G part is unused and in its original packaging.
Return procedure for SZMMSZ30T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMMSZ30T1G 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…
