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Taiwan Semiconductor Corporation MMSZ4689 RHG
- Part No.:
- MMSZ4689 RHG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4689 RHG.pdf
- Description:
- DIODE ZENER 5.1V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MMSZ4689 RHG from Taiwan Semiconductor is a 500mW surface-mount Zener diode with a nominal zener voltage of 5.1V, ±5% tolerance (4.845V–5.355V), 50mA test current, and 3.0μA leakage current at 3.0V reverse bias. It serves as a precision voltage reference and overvoltage clamp in low-power regulation circuits, commonly used in power supply feedback loops and I/O protection stages.
For engineers reviewing the MMSZ4689 RHG datasheet, MMSZ4689 RHG pinout, MMSZ4689 RHG application, or MMSZ4689 RHG equivalent, key selection criteria include its SOD-123 package footprint, 150°C maximum junction temperature, thermal resistance of 340°C/W, and compliance with J-STD-020 Level 1 moisture sensitivity - critical for reflow compatibility and board-level reliability in consumer and industrial designs.
Technical Context
The MMSZ4689 RHG operates as a silicon planar Zener diode optimized for stable reverse-breakdown conduction under controlled current. Its zener voltage is specified at 50mA test current (IZT), with dynamic impedance typically <30Ω near nominal voltage and leakage current tightly bounded at ≤3.0μA at VR = 3.0V.
Designed for surface-mount assembly on standard PCBs, it features matte tin-plated leads compliant with J-STD-002 solderability requirements, UL 94V-0 molded compound, and polarity indicated by a cathode band - enabling unambiguous orientation during automated placement and inspection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.845V (min) to 5.355V (max) at 50mA - defines precise clamping threshold for 5V rail stabilization |
| Power Dissipation (PD) | 500mW - supports continuous operation up to ~98mA at 5.1V without derating at 25°C ambient |
| Junction Temperature (TJ) | −55°C to +150°C - enables use in extended-temperature industrial environments |
| Thermal Resistance (RθJA) | 340°C/W - requires ≥5 cm² Cu pad for full-rated power dissipation at TA = 25°C |
| Leakage Current (IR) | ≤3.0μA at VR = 3.0V - ensures minimal standby current draw in battery-powered sensing nodes |
| Moisture Sensitivity Level | Level 1 per J-STD-020 - allows unlimited floor life and standard reflow without baking |
Pinout & Package
Package: SOD-123 - compact 2.85mm × 1.80mm surface-mount plastic case with cathode band marking; weight ≈10.97mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in reverse-bias regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated node (e.g., feedback divider tap); marked by visible band on body |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage tolerance | ±5% (4.845V–5.355V) at 50mA - reduces need for post-production trimming in 5V reference designs |
| Low leakage current | ≤3.0μA at 3.0V reverse bias - preserves battery life in always-on monitoring circuits |
| RoHS & halogen-free compliance | Fully compliant with EU RoHS Directive 2011/65/EU and halogen-free standards - meets export and sustainability requirements |
| Solderability assurance | Matte tin-plated leads qualified per J-STD-002 - ensures reliable wetting and joint integrity in lead-free reflow |
Applications
| USB Port Overvoltage Protection | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector downstream of TVS diode, limiting voltage to safe level for USB PHY ICs. Use Value: 5.1V nominal clamping aligns with USB 2.0 VBUS tolerance (4.75–5.25V), preventing latch-up in connected peripherals. | Use Scenario: Generating a clean, temperature-stable reset threshold for 3.3V or 5V microcontrollers. IC Role / Device Role / Timing Role: Precision voltage reference in RC-based reset generator or supervisor IC input divider network. Use Value: Tight 5.1V ±5% tolerance ensures consistent reset assertion across −40°C to +85°C operating range. |
| Low-Power Sensor Biasing | Industrial Analog Input Protection |
Use Scenario: Providing stable excitation voltage to resistive sensors (e.g., RTDs, strain gauges) in battery-operated IoT nodes. IC Role / Device Role / Timing Role: Low-current Zener reference replacing higher-power LDOs where ultra-low quiescent current is critical. Use Value: 3.0μA leakage at 3.0V enables multi-year battery life in sub-10μA sleep-mode systems. | Use Scenario: Protecting ADC inputs from overvoltage transients in PLC analog modules exposed to field wiring noise. IC Role / Device Role / Timing Role: Secondary clamping element after series current-limiting resistor, absorbing residual energy beyond primary TVS. Use Value: 500mW rating sustains short-duration 100ns transients up to 500V without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C5V1 | Same 5.1V nominal, ±5% tolerance; 300mW rating; SOD-523 package (smaller footprint) | Lower power handling limits use in >100mA transient suppression; tighter space constraints may favor this variant | Select BZX584-C5V1 only if board area is constrained and peak power remains <300mW |
| MMBZ5222BS | 5.1V nominal, ±5%, but rated at 350mW; SOT-23 package with 3-pin configuration (cathode/anode/common) | Requires different layout due to 3-pin SOT-23; common-cathode dual configuration not needed here | Choose MMBZ5222BS only when dual-Zener topology or existing SOT-23 land pattern mandates reuse |
Compared with BZX584-C5V1 and MMBZ5222BS, the MMSZ4689 RHG offers superior power handling (500mW vs. 300mW/350mW) and direct SOD-123 compatibility with legacy layouts - making it optimal for cost-sensitive, medium-power 5V regulation where thermal margin and assembly simplicity are prioritized.
Availability
MMSZ4689 RHG is available at Aetrix Electronics and suitable for USB power management, microcontroller reset generation, low-power sensor biasing, and industrial analog input protection requiring stable component supply and full traceability.
Supply support for MMSZ4689 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, analog ICs, and protection components for industrial, computing, and consumer markets.
The MMSZ4689 RHG belongs to TSC's MMSZ4678–MMSZ4716 family of 500mW Zener diodes, engineered for high-density surface-mount voltage regulation and clamping in space-constrained, cost-sensitive applications.
FAQ
What is the exact zener voltage range for MMSZ4689 RHG?
The MMSZ4689 RHG has a guaranteed zener voltage range of 4.845V (minimum) to 5.355V (maximum) when tested at 50mA (IZT), per Taiwan Semiconductor's official datasheet revision A2311. This ±5% tolerance is measured under standard conditions (TA = 25°C) and defines the device's precision clamping window for 5V system rails. The MMSZ4689 RHG maintains this specification across its full operating temperature range.
Is MMSZ4689 RHG compatible with lead-free reflow processes?
Yes, the MMSZ4689 RHG is fully compatible with lead-free reflow. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its SOD-123 package is rated for peak reflow temperatures up to 260°C. With J-STD-020 Level 1 moisture sensitivity, the MMSZ4689 RHG can be processed directly from dry pack without baking - simplifying manufacturing flow and reducing risk of popcorning.
What is the maximum steady-state current the MMSZ4689 RHG can handle at room temperature?
At TA = 25°C, the MMSZ4689 RHG supports a maximum steady-state current of approximately 98mA, calculated from its 500mW power rating and nominal 5.1V zener voltage (P = V × I → I = 500mW / 5.1V ≈ 98mA). Derating is required above 25°C ambient per the power temperature derating curve; at 70°C, usable current drops to ~70mA. This makes the MMSZ4689 RHG suitable for moderate-duty regulation tasks.
Does MMSZ4689 RHG have a specified dynamic impedance value?
While the MMSZ4689 RHG datasheet does not list a single guaranteed ZZ value, Figure 4 shows typical dynamic impedance versus zener voltage, indicating values below 30Ω near 5.1V at IZ = 50mA. This low impedance ensures minimal voltage variation under load changes - critical for maintaining accuracy in feedback networks. Designers should consult the "Zener Voltage vs. Zener Current" curves (Fig. 2–3) for application-specific impedance estimation.
How is polarity identified on the MMSZ4689 RHG package?
Polarity on the MMSZ4689 RHG is indicated by a distinct cathode band printed on the SOD-123 package body - located adjacent to the cathode terminal. This band must align with the PCB silkscreen or copper marking during placement. The anode is the unmarked end. Correct orientation is essential: reverse connection prevents proper zener breakdown and may cause open-circuit behavior in regulation applications.
MMSZ4689 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):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ4689 RHG FAQ
1.How can I place an order for MMSZ4689 RHG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4689 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 MMSZ4689 RHG reliable?
The price and inventory of MMSZ4689 RHG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4689 RHG is usually 5 days.
3.What payment methods are accepted for MMSZ4689 RHG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4689 RHG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4689 RHG?
MMSZ4689 RHG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4689 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 MMSZ4689 RHG?
For technical support, including MMSZ4689 RHG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4689 RHG requirements.
6.How does Aetrix verify that MMSZ4689 RHG is sourced from the original manufacturer or authorized distributors?
All MMSZ4689 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 MMSZ4689 RHG meets industry standards.
7.What is the process for return or replacement of MMSZ4689 RHG?
All MMSZ4689 RHG units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4689 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 MMSZ4689 RHG part is unused and in its original packaging.
Return procedure for MMSZ4689 RHG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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