My Inquiry
My Account
onsemi SZMMSZ4708T1G
- Part No.:
- SZMMSZ4708T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ4708T1G.pdf
- Description:
- DIODE ZENER 22V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:17,820
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZMMSZ4708T1G from onsemi is a 22 V ±5% Zener voltage regulator diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 50 µA test current (IZT), 0.01 µA reverse leakage at 16.7 V, and −55°C to +150°C operating temperature range-used for precision voltage reference and overvoltage protection in automotive power rails.
For engineers reviewing the SZMMSZ4708T1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance, low IZT requirement, thermal derating behavior, and AEC−Q101 qualification for automotive-grade reliability validation.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and input conditions. Its 22 V nominal Zener voltage exhibits a positive temperature coefficient above ~5 V, with typical TC near +3.5 mV/°C per Figure 1 of the datasheet.
The device uses a planar epitaxial construction in a void-free thermosetting plastic case, with cathode polarity marked by a band. It delivers specified regulation performance only when operated within its thermal limits-junction-to-ambient RJA = 340°C/W and junction-to-lead RJL = 150°C/W-requiring careful PCB layout for heat dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20.9 V min / 22 V nom / 23.1 V max @ IZT = 50 µA-defines regulated output voltage window under standard test conditions. |
| Power Dissipation (PD) | 500 mW @ TL = 75°C, derated 6.7 mW/°C above-sets maximum steady-state thermal load on FR−5 board. |
| Reverse Leakage (IR) | ≤0.01 µA @ VR = 16.7 V-ensures minimal quiescent current in standby or high-impedance bias networks. |
| Junction Temp Range | −55°C to +150°C-supports operation in under-hood automotive environments and industrial control enclosures. |
| ESD Rating | Class 3 (>16 kV) HBM-enables robust handling during automated assembly without special ESD precautions. |
| Package | SOD−123 (1.60 × 2.69 × 1.16 mm)-provides compact footprint for high-density PCBs while maintaining solderability and thermal performance. |
Pinout & Package
SOD−123 surface-mount package with two terminals: cathode (marked by polarity band) and anode. Case is void-free, thermosetting plastic with UL 94 V−0 flammability rating and corrosion-resistant, easily solderable finish. Maximum soldering temperature: 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated voltage output node | Connected to load or reference point; voltage measured relative to anode; polarity band identifies this terminal. |
| 2 (Anode) | Reference/ground return path | Typically tied to system ground or lower-potential rail; completes current path during Zener conduction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring PPAP compliance. |
| Low IZT (50 µA) | Enables stable regulation with minimal bias current-ideal for battery-powered or ultra-low-power sensor nodes. |
| Pb−Free & RoHS compliant | Meets global environmental regulations and supports lead-free reflow soldering processes without reliability compromise. |
| High ESD immunity (≥16 kV HBM) | Reduces risk of field failure due to handling-induced damage during manufacturing or field service. |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 22 V reference for analog front-end comparators monitoring fuel injector driver voltage. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise threshold for overvoltage detection circuitry. Use Value: Tight 5% VZ tolerance and −55°C to +150°C operation ensure consistent trip points across full vehicle temperature range. | Use Scenario: Biasing op-amp input stages in 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Low-leakage (0.01 µA) voltage clamp protecting amplifier inputs from transient overvoltage events. Use Value: Minimal IR prevents loading of high-impedance sensor bridges and preserves signal integrity in millivolt-level measurements. |
| Telecom Power Supply Monitoring | Medical Diagnostic Equipment Protection |
Use Scenario: Monitoring +24 V DC distribution rail in base station power modules for brownout and overvoltage alarms. IC Role / Device Role / Timing Role: Precision Zener element in comparator-based supervision circuit detecting deviations beyond ±5% of nominal rail. Use Value: 22 V nominal rating aligns directly with common telecom supply tolerances; AEC−Q101 grade ensures long-term stability in continuous operation. | Use Scenario: Protecting analog acquisition circuits in portable ultrasound devices from ESD and surge events on external probe interfaces. IC Role / Device Role / Timing Role: Low-capacitance (<5 pF at 16.7 V bias) shunt protector clamping fast transients without distorting MHz-range echo signals. Use Value: Small SOD−123 footprint enables placement adjacent to connector pins; Class 3 HBM rating meets IEC 61000-4-2 Level 4 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4708T1G | No SZ prefix; not AEC−Q101 qualified; same electrical specs and SOD−123 package. | Intended for commercial/industrial use only-not approved for automotive PPAP or change-controlled sites. | Select when automotive qualification is unnecessary and cost sensitivity outweighs traceability requirements. |
| BZX84-C22LT1G | 22 V Zener, SOT−23 package, 350 mW rating, higher IR (≤100 nA @ 17.6 V), no AEC−Q101 certification. | Larger package footprint and lower power rating limit use in space-constrained or high-power-clamp roles. | Choose only if SOT−23 is already standardized in design and thermal margin exceeds 150 mW. |
Compared with MMSZ4708T1G and BZX84-C22LT1G, SZMMSZ4708T1G uniquely combines automotive qualification, 500 mW power capability, and ultra-low leakage in the smallest possible SOD−123 form factor-making it the preferred choice where reliability, thermal headroom, and regulatory compliance intersect.
Availability
SZMMSZ4708T1G is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor signal conditioning, and telecom power supply monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SZMMSZ4708T1G 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 (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ4xxxT1G/SZMMSZ4xxxT1G series was designed specifically to deliver AEC−Q101-qualified, low-leakage Zener regulation in miniature SOD−123 packages for next-generation automotive electronics and high-reliability industrial systems.
FAQ
What is the nominal Zener voltage and tolerance of SZMMSZ4708T1G?
The SZMMSZ4708T1G has a nominal Zener voltage of 22 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 20.9 V and 23.1 V when tested at IZT = 50 µA and TA = 25°C. This tight tolerance ensures predictable regulation performance in precision reference and protection circuits where voltage accuracy is critical.
Is SZMMSZ4708T1G suitable for automotive applications?
Yes, SZMMSZ4708T1G is AEC−Q101 qualified and PPAP capable, with the "SZ" prefix indicating compliance for automotive and other applications requiring unique site and control change requirements. Its −55°C to +150°C operating range, high ESD immunity (>16 kV HBM), and traceable Pb−Free construction make it appropriate for under-hood ECUs and body control modules.
What is the maximum power dissipation of SZMMSZ4708T1G and how does it derate with temperature?
SZMMSZ4708T1G is rated for 500 mW total power dissipation on FR−5 board at TL = 75°C, with linear derating of 6.7 mW/°C above that temperature. At 125°C board temperature, its usable power drops to approximately 150 mW-requiring thermal-aware PCB layout with adequate copper area to avoid exceeding junction temperature limits.
How does the reverse leakage current of SZMMSZ4708T1G compare to similar Zeners?
SZMMSZ4708T1G specifies ≤0.01 µA reverse leakage current at VR = 16.7 V, significantly lower than many competing 22 V Zeners (e.g., BZX84-C22LT1G specifies ≤100 nA). This ultra-low IR minimizes parasitic loading in high-impedance bias networks and improves accuracy in precision reference applications where leakage-induced errors must be avoided.
What package type and dimensions does SZMMSZ4708T1G use?
SZMMSZ4708T1G uses the SOD−123 surface-mount package (Case 425, Style 1), measuring 1.60 mm × 2.69 mm × 1.16 mm. It features a cathode polarity band, void-free thermosetting plastic case, UL 94 V−0 flammability rating, and is optimized for automated board assembly with standard reflow profiles up to 260°C for 10 seconds.
SZMMSZ4708T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- -
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 nA @ 16.7 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
SZMMSZ4708T1G FAQ
1.How can I place an order for SZMMSZ4708T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ4708T1G 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 SZMMSZ4708T1G reliable?
The price and inventory of SZMMSZ4708T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ4708T1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ4708T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ4708T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ4708T1G?
SZMMSZ4708T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ4708T1G 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 SZMMSZ4708T1G?
For technical support, including SZMMSZ4708T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ4708T1G requirements.
6.How does Aetrix verify that SZMMSZ4708T1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ4708T1G 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 SZMMSZ4708T1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ4708T1G?
All SZMMSZ4708T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ4708T1G, 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 SZMMSZ4708T1G part is unused and in its original packaging.
Return procedure for SZMMSZ4708T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMMSZ4708T1G 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…
