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Taiwan Semiconductor Corporation MMSZ4686 RHG
- Part No.:
- MMSZ4686 RHG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4686 RHG.pdf
- Description:
- DIODE ZENER 3.9V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MMSZ4686 RHG from Taiwan Semiconductor is a 3.9 V, 500 mW surface-mount Zener diode in SOD-123 package, designed for precision voltage regulation and overvoltage protection in low-power analog and digital circuits. It delivers ±2.5% nominal Zener voltage tolerance (3.705 V to 4.095 V), 50 µA test current, and 5.0 µA leakage at 2.0 V reverse bias.
For engineers reviewing the MMSZ4686 RHG datasheet, MMSZ4686 RHG pinout, MMSZ4686 RHG application, or MMSZ4686 RHG equivalent, key selection criteria include its 3.9 V regulation point, 500 mW power rating, SOD-123 thermal performance (RθJA = 340 °C/W), moisture sensitivity level 1 compliance, and RoHS/halogen-free construction.
Technical Context
The MMSZ4686 RHG operates as a two-terminal, silicon planar Zener diode with sharp reverse breakdown characteristics at 3.9 V. Its junction temperature range spans −55 °C to +150 °C, and it maintains stable regulation under 50 µA test current with dynamic impedance optimized for low-noise reference use.
Designed for surface-mount assembly on standard PCBs, the device uses matte tin-plated leads compliant with J-STD-002 solderability and features a cathode band for polarity identification. Its SOD-123 package meets UL 94V-0 flammability rating and supports high-density board layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.705 V (min) to 4.095 V (max) at IZT = 50 µA - defines tight regulation window for 3.9 V reference applications |
| Power Dissipation (PD) | 500 mW - sets maximum continuous power handling on standard 5 cm × 5 cm Cu pad |
| Junction Temperature (TJ) | −55 °C to +150 °C - enables operation in extended industrial environments |
| Leakage Current (IR) | 5.0 µA at VR = 2.0 V - ensures low standby power loss in battery-powered circuits |
| Thermal Resistance (RθJA) | 340 °C/W - determines temperature rise per watt dissipated on standard test board |
| Moisture Sensitivity Level | Level 1 per J-STD-020 - allows unlimited floor life without dry pack or baking |
Pinout & Package
Package: SOD-123 - surface-mount plastic case with cathode band marking; dimensions: 3.55 mm × 1.65 mm × 1.15 mm (L × W × H); weight ≈ 10.97 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection | Connected to ground or lower potential node in shunt regulator configuration |
| Cathode | Reverse breakdown terminal / regulated output node | Provides stable 3.9 V reference when biased above breakdown; marked by visible band |
Key Features
| Feature | Design Value |
|---|---|
| Constant voltage control | Enables stable 3.9 V reference generation in low-current bias networks and feedback paths |
| RoHS and halogen-free compliance | Meets global environmental regulations for consumer, industrial, and telecom end equipment |
| SOD-123 package with UL 94V-0 rating | Supports automated placement and reflow while ensuring flame-retardant board safety |
| Moisture sensitivity level 1 | Eliminates pre-bake requirements and simplifies SMT line logistics |
Applications
| USB Port Protection | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping transient surges on 5 V USB VBUS lines during hot-plug events. IC Role / Device Role / Timing Role: Shunt overvoltage protector limiting voltage to ≤4.1 V to safeguard downstream USB transceivers. Use Value: Prevents latch-up or damage to 3.3 V logic interfaces by clamping within safe margin of 3.9 V Zener threshold. | Use Scenario: Generating clean reset signal for ARM Cortex-M0+ microcontrollers during power-up. IC Role / Device Role / Timing Role: Precision voltage reference in RC-based reset timing network. Use Value: Ensures reliable reset assertion at 3.9 V threshold, independent of supply ramp rate or noise. |
| Low-Power Sensor Biasing | ADC Reference Stabilization |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in battery-operated IoT nodes. IC Role / Device Role / Timing Role: Low-quiescent-current voltage reference source for sensor bridge biasing. Use Value: Delivers <5 µA leakage and ±2.5% tolerance to minimize measurement drift across temperature. | Use Scenario: Stabilizing reference input of 12-bit SAR ADCs in portable medical monitors. IC Role / Device Role / Timing Role: Secondary reference clamp improving PSRR and reducing supply-induced INL error. Use Value: Limits reference rail excursion to 3.9 V ±0.2 V, maintaining ADC accuracy under noisy 5 V rail conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C3V9 | Same 3.9 V nominal Zener voltage but rated at 300 mW; SOD-323 package (smaller footprint) | Lower power handling limits use in higher-current bias networks; tighter layout constraints due to smaller pad area | Select when board space is critical and dissipation remains below 300 mW |
| MMBZ5227BS | 3.6 V nominal Zener voltage; 200 mW rating; SOT-23 package; ±5% tolerance | Lower voltage and wider tolerance reduce accuracy in precision references; SOT-23 offers better thermal dissipation than SOD-123 | Choose for cost-sensitive designs where 3.6 V regulation suffices and tighter voltage tolerance is not required |
Compared with BZX584-C3V9 and MMBZ5227BS, the MMSZ4686 RHG provides higher power capability (500 mW), tighter voltage tolerance (±2.5%), and industry-standard SOD-123 compatibility-making it optimal for robust, medium-accuracy regulation where thermal margin and manufacturability are prioritized.
Availability
MMSZ4686 RHG is available at Aetrix Electronics and suitable for USB protection circuits, microcontroller reset networks, low-power sensor biasing, and ADC reference stabilization requiring stable component supply and consistent parametric performance across production lots.
Supply support for MMSZ4686 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 MMSZ46xx series belongs to TSC's general-purpose Zener diode product line, engineered specifically for compact, high-reliability voltage regulation and transient suppression in space-constrained surface-mount applications.
FAQ
What is the nominal Zener voltage of the MMSZ4686 RHG?
The MMSZ4686 RHG has a nominal Zener voltage of 3.9 V, with a guaranteed range of 3.705 V (minimum) to 4.095 V (maximum) at a test current of 50 µA. This tight ±2.5% tolerance makes the MMSZ4686 RHG suitable for applications demanding stable low-voltage reference points, such as reset circuitry and sensor excitation networks.
What package type does the MMSZ4686 RHG use?
The MMSZ4686 RHG is housed in an SOD-123 surface-mount package, measuring 3.55 mm × 1.65 mm × 1.15 mm, with matte tin-plated leads and a visible cathode band for polarity identification. Its UL 94V-0 rated molding compound and moisture sensitivity level 1 classification support reliable automated assembly without special handling.
What is the maximum power dissipation rating for the MMSZ4686 RHG?
The MMSZ4686 RHG is rated for a steady-state power dissipation of 500 mW at 25 °C ambient temperature when mounted on a 5 cm × 5 cm copper pad. Derating is required above 25 °C per the published power temperature curve, reaching zero dissipation at 150 °C junction temperature.
Is the MMSZ4686 RHG RoHS and halogen-free compliant?
Yes, the MMSZ4686 RHG is fully RoHS compliant and halogen-free, meeting EU Directive 2011/65/EU and IPC-4101D requirements. These environmental qualifications ensure suitability for export-controlled and eco-conscious electronics designs, including consumer wearables and industrial gateways.
What is the leakage current specification for the MMSZ4686 RHG?
The MMSZ4686 RHG exhibits a maximum leakage current of 5.0 µA at a reverse voltage of 2.0 V and 25 °C ambient temperature. This low leakage supports energy-efficient operation in always-on circuits such as real-time clock backup supplies and battery-monitoring comparators.
MMSZ4686 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):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 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
MMSZ4686 RHG FAQ
1.How can I place an order for MMSZ4686 RHG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4686 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 MMSZ4686 RHG reliable?
The price and inventory of MMSZ4686 RHG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4686 RHG is usually 5 days.
3.What payment methods are accepted for MMSZ4686 RHG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4686 RHG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4686 RHG?
MMSZ4686 RHG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4686 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 MMSZ4686 RHG?
For technical support, including MMSZ4686 RHG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4686 RHG requirements.
6.How does Aetrix verify that MMSZ4686 RHG is sourced from the original manufacturer or authorized distributors?
All MMSZ4686 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 MMSZ4686 RHG meets industry standards.
7.What is the process for return or replacement of MMSZ4686 RHG?
All MMSZ4686 RHG units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4686 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 MMSZ4686 RHG part is unused and in its original packaging.
Return procedure for MMSZ4686 RHG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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