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Taiwan Semiconductor Corporation MMSZ4709 RHG
- Part No.:
- MMSZ4709 RHG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4709 RHG.pdf
- Description:
- DIODE ZENER 24V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MMSZ4709 RHG from Taiwan Semiconductor is a surface-mount Zener diode with a nominal zener voltage of 24 V, 500 mW power dissipation, and SOD-123 package. It provides precise voltage regulation and overvoltage protection in low-power analog circuits, power supply feedback paths, and reference voltage generation.
For engineers reviewing the MMSZ4709 RHG datasheet, MMSZ4709 RHG pinout, MMSZ4709 RHG application, or MMSZ4709 RHG equivalent, key selection criteria include its 22.8–25.2 V zener voltage range at 50 mA test current, 0.01 µA leakage at 18.2 V reverse bias, thermal resistance of 340 °C/W, and RoHS/halogen-free compliance for industrial and consumer PCB designs.
Technical Context
The MMSZ4709 RHG operates as a two-terminal voltage reference device, maintaining stable output voltage across varying load currents within its 500 mW power limit. Its zener breakdown mechanism delivers predictable regulation with dynamic impedance specified per curve data, and it functions reliably from −55 °C to +150 °C junction temperature.
Designed for surface-mount assembly on standard PCBs, the device uses a cathode-band polarity indicator and matte tin-plated leads compliant with J-STD-002 solderability. Its SOD-123 outline meets JEDEC DO-215 (Variation AD) and UL 94V-0 flammability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8–25.2 V at IZT = 50 mA - defines regulation window for precision reference use |
| Power Dissipation (PD) | 500 mW - sets maximum continuous steady-state power handling on 5 cm × 5 cm Cu pad |
| Junction Temperature (TJ) | −55 to +150 °C - enables operation in extended industrial ambient environments |
| Leakage Current (IR) | 0.01 µA at VR = 18.2 V - ensures minimal error current in high-impedance bias networks |
| Thermal Resistance (RθJA) | 340 °C/W - determines temperature rise under load; requires thermal pad design for full power use |
| Package | SOD-123 - 2.85 mm × 1.80 mm footprint supports high-density layout and automated placement |
Pinout & Package
Two-terminal device in SOD-123 package: anode and cathode terminals identified by molded cathode band. No internal circuitry-direct connection only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward bias; reference node during reverse breakdown | Connected to lower-potential side of regulated circuit; establishes ground or common reference |
| Cathode | Current exit point during reverse breakdown; voltage regulation node | Connected to higher-potential side; delivers stable 24 V nominal output when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Constant voltage control | Stable 24 V regulation across 5–100 mA operating range, minimizing supply drift in feedback loops |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement before reflow-simplifies SMT manufacturing flow |
| RoHS and halogen-free compliance | Meets EU environmental directives and IPC-1752 material declaration requirements |
| UL 94V-0 molding compound | Self-extinguishing plastic housing reduces fire risk in enclosed power modules and adapters |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Used in secondary-side feedback path of isolated DC-DC converters to regulate output voltage via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Zener diode acting as precision voltage reference for TL431 or similar shunt regulator IC. Use Value: Tight 22.8–25.2 V tolerance ensures ±1% output regulation accuracy without trimming resistors. | Use Scenario: Placed across sensitive input pins of microcontrollers or sensors to clamp transient surges from ESD or inductive kickback. IC Role / Device Role / Timing Role: Passive overvoltage protection element limiting voltage to ≤25.2 V during fault conditions. Use Value: Low 0.01 µA leakage preserves signal integrity in high-impedance sensor interfaces. |
| Low-Power Voltage Reference | Signal Level Shifting |
Use Scenario: Generating stable 24 V reference for analog-to-digital converter (ADC) biasing or DAC output scaling in battery-powered instrumentation. IC Role / Device Role / Timing Role: Two-terminal passive reference source replacing active references where ultra-low quiescent current is critical. Use Value: 500 mW rating allows operation up to 20.8 mA at 24 V-sufficient for multiple op-amp bias networks. | Use Scenario: Biasing logic-level translators between 3.3 V and 5 V domains using zener-based level-shifting topology. IC Role / Device Role / Timing Role: Cathode-connected to 5 V rail, anode to 3.3 V domain-establishes ~24 V clamped offset for bidirectional translation. Use Value: SOD-123 size fits tight spacing between mixed-voltage ICs without requiring additional passives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C24LT1G | Same 24 V nominal VZ, but 300 mW PD and SOD-323 package (smaller footprint) | Lower power handling limits use in >12.5 mA regulation paths; tighter layout constraints | Select when board space is critical and load current stays below 12.5 mA |
| MMBZ5242BS-7-F | 24 V nominal VZ, 350 mW PD, SOT-23 package with three terminals (dual-anode configuration) | Requires different PCB layout; dual-diode structure adds redundancy but increases cost | Choose for designs needing dual-channel clamping or legacy SOT-23 compatibility |
Compared with BZX584C24LT1G and MMBZ5242BS-7-F, the MMSZ4709 RHG offers highest power margin (500 mW) and widest zener voltage tolerance (±1.2 V), making it optimal for robust regulation in variable-load industrial supplies where thermal headroom and tolerance stability matter most.
Availability
MMSZ4709 RHG is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and low-power voltage reference applications requiring stable component supply and full tape-and-reel delivery.
Supply support for MMSZ4709 RHG 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, rectifiers, and protection components for industrial, automotive, and consumer markets.
The MMSZ series was developed specifically for high-reliability, low-cost voltage regulation in space-constrained SMT applications-emphasizing tight VZ tolerance, moisture-insensitive packaging, and consistent thermal performance.
FAQ
What is the nominal zener voltage of the MMSZ4709 RHG?
The MMSZ4709 RHG has a nominal zener voltage of 24 V, with a guaranteed range of 22.8 V to 25.2 V at a test current of 50 mA. This specification is confirmed in the Electrical Specifications table of the official Taiwan Semiconductor datasheet (Version A2311). The MMSZ4709 RHG achieves this voltage via controlled silicon doping and process calibration, enabling repeatable regulation in feedback and reference circuits.
What package type does the MMSZ4709 RHG use?
The MMSZ4709 RHG uses the SOD-123 surface-mount package, measuring 2.85 mm × 1.80 mm with a 1.25 mm height. Its cathode is marked by a visible band, and terminals are matte tin-plated for J-STD-002 solderability. The MMSZ4709 RHG's SOD-123 outline complies with JEDEC DO-215 Variation AD and UL 94V-0 flammability standards, supporting automated pick-and-place and lead-free reflow.
What is the maximum power dissipation rating for the MMSZ4709 RHG?
The MMSZ4709 RHG has a steady-state power dissipation rating of 500 mW at 25 °C ambient, derating linearly above 25 °C per the published power temperature curve. This rating assumes mounting on a 5 cm × 5 cm copper pad; actual usable power depends on PCB thermal design. The MMSZ4709 RHG's 340 °C/W junction-to-ambient thermal resistance directly informs heatsinking requirements in sustained-load applications.
Is the MMSZ4709 RHG RoHS and halogen-free compliant?
Yes, the MMSZ4709 RHG is fully RoHS compliant and halogen-free, as stated in the Features section of the Taiwan Semiconductor datasheet. These compliance attributes meet EU Directive 2011/65/EU and IPC-1752 material declarations. The MMSZ4709 RHG's halogen-free status also supports safer end-of-life processing and reduced corrosive gas emission during board rework or failure analysis.
What is the leakage current specification for the MMSZ4709 RHG?
The MMSZ4709 RHG exhibits a maximum leakage current of 0.01 µA at a reverse voltage of 18.2 V, measured at 25 °C. This ultra-low leakage ensures minimal loading in high-impedance reference nodes and preserves accuracy in precision analog circuits. The MMSZ4709 RHG's leakage performance is validated across the full −55 °C to +150 °C junction temperature range per Absolute Maximum Ratings data.
MMSZ4709 RHG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 nA @ 18.2 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ4709 RHG FAQ
1.How can I place an order for MMSZ4709 RHG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4709 RHG 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 MMSZ4709 RHG reliable?
The price and inventory of MMSZ4709 RHG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4709 RHG is usually 5 days.
3.What payment methods are accepted for MMSZ4709 RHG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4709 RHG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4709 RHG?
MMSZ4709 RHG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4709 RHG 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 MMSZ4709 RHG?
For technical support, including MMSZ4709 RHG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4709 RHG requirements.
6.How does Aetrix verify that MMSZ4709 RHG is sourced from the original manufacturer or authorized distributors?
All MMSZ4709 RHG 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 MMSZ4709 RHG meets industry standards.
7.What is the process for return or replacement of MMSZ4709 RHG?
All MMSZ4709 RHG units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4709 RHG, 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 MMSZ4709 RHG part is unused and in its original packaging.
Return procedure for MMSZ4709 RHG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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