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Taiwan Semiconductor Corporation MMSZ4699 RHG
- Part No.:
- MMSZ4699 RHG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4699 RHG.pdf
- Description:
- DIODE ZENER 12V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MMSZ4699 RHG from Taiwan Semiconductor is a 500mW surface-mount Zener diode with a nominal zener voltage of 12 V, ±5% tolerance (11.4–12.6 V), tested at 50 mA, and designed for precision voltage regulation and overvoltage protection in compact PCB layouts.
For engineers reviewing the MMSZ4699 RHG datasheet, MMSZ4699 RHG pinout, MMSZ4699 RHG application, or MMSZ4699 RHG equivalent, key selection criteria include its SOD-123 package, 9.1 µA leakage current at 9.1 V reverse bias, 340°C/W junction-to-ambient thermal resistance, and compliance with RoHS and halogen-free standards.
Technical Context
The MMSZ4699 RHG operates as a single-terminal, cathode-banded silicon Zener diode optimized for stable voltage reference and clamping in low-power analog and digital circuits. Its 12 V nominal breakdown voltage is specified at 50 mA test current, with dynamic impedance and temperature coefficient defined across the -55°C to +150°C junction range.
It features moisture sensitivity level 1 per J-STD-020, matte tin-plated leads solderable per J-STD-002, and UL 94V-0 compliant molding compound - all supporting automated assembly and long-term reliability in consumer and industrial applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.4–12.6 V at IZT = 50 mA - defines precise clamping threshold for 12 V rail protection |
| Power Dissipation (PD) | 500 mW - limits continuous power handling on standard 5 cm × 5 cm Cu pad |
| Junction Temperature (TJ) | -55°C to +150°C - enables operation in extended-temperature industrial environments |
| Leakage Current (IR) | ≤9.1 µA at VR = 9.1 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance (RθJA) | 340°C/W - determines temperature rise under load; requires thermal pad design for sustained 500 mW |
| Package | SOD-123 - 2.85 mm × 1.80 mm footprint supports high-density routing and reflow compatibility |
Pinout & Package
Package: SOD-123 - surface-mount plastic case with cathode band marking; dimensions: 2.85 mm × 1.80 mm × 1.25 mm (L × W × H); weight ≈ 10.97 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to lower-potential side in reverse-biased regulation configuration |
| Cathode | Zener breakdown terminal / regulated output node | Marked by band; supplies stable 12 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| Constant voltage control | Enables accurate 12 V reference generation without external feedback components |
| Moisture sensitivity level 1 | Eliminates bake requirement before reflow, reducing manufacturing overhead |
| RoHS and halogen-free compliance | Meets global environmental regulations for consumer and industrial end equipment |
| UL 94V-0 flammability rating | Ensures flame-retardant behavior during fault conditions in enclosed assemblies |
Applications
| Power Supply Rail Protection | Microcontroller I/O Clamping |
|---|---|
Use Scenario: Protecting 12 V DC input rails from transient surges in wall-adapters and PoE-powered devices. IC Role / Device Role / Timing Role: Zener clamping element placed between rail and ground to shunt excess energy above 12.6 V. Use Value: Limits voltage excursion to ≤12.6 V with <9.1 µA leakage below 9.1 V, preserving upstream regulator integrity. | Use Scenario: Safeguarding 3.3 V or 5 V microcontroller GPIO pins against ESD or miswiring-induced overvoltage. IC Role / Device Role / Timing Role: Low-capacitance (<5 pF typical) clamp referenced to local ground. Use Value: Provides fast response to transients while adding negligible loading to signal lines due to sub-µA leakage. |
| Reference Voltage Source | Low-Power Sensor Biasing |
Use Scenario: Generating stable 12 V reference for ADC voltage dividers or op-amp bias networks in battery-operated sensors. IC Role / Device Role / Timing Role: Precision voltage reference with ±5% tolerance and low tempco over -40°C to +85°C ambient. Use Value: Delivers repeatable 12 V output at 50 mA without active regulation, reducing BOM count and quiescent current. | Use Scenario: Biasing analog front-end components (e.g., thermistors, RTDs) in portable medical or environmental monitors. IC Role / Device Role / Timing Role: Low-power voltage clamp ensuring sensor excitation stays within safe operating range. Use Value: Maintains bias stability with only 500 mW dissipation limit and 340°C/W thermal resistance on minimal copper area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C12 | Same 12 V nominal, but ±5% tolerance at 5 mA test current; higher ZZK, lower IR (0.1 µA @ 9.1 V) | Lower leakage suits ultra-low-power sleep modes; less stable regulation at higher currents | Select for battery-critical systems where <0.1 µA leakage outweighs 50 mA regulation accuracy |
| MMBZ5242B | 12 V nominal, ±5%, but SOT-23 package (larger footprint, higher RθJA = 375°C/W); 100 mW PD | Not suitable for 500 mW continuous use; limited to pulsed or low-duty-cycle clamping | Choose only if SOT-23 is required for legacy layout compatibility and power demand is <100 mW |
Compared with BZX584-C12 and MMBZ5242B, the MMSZ4699 RHG delivers superior thermal performance (340°C/W), full 500 mW capability in SOD-123, and tighter regulation at 50 mA - making it optimal for sustained 12 V clamping in space-constrained industrial modules.
Availability
MMSZ4699 RHG is available at Aetrix Electronics and suitable for power supply protection, microcontroller I/O clamping, and reference voltage generation requiring stable component supply, consistent tape-and-reel packaging (3,000 units per 7″ reel), and full traceability.
Supply support for MMSZ4699 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, automotive, and consumer markets.
The MMSZ4699 RHG belongs to TSC's MMSZ4678–MMSZ4716 family of 500 mW Zener diodes, engineered for high-density surface-mount voltage regulation and transient suppression in cost-sensitive, space-constrained applications.
FAQ
What is the exact zener voltage range for MMSZ4699 RHG?
The MMSZ4699 RHG has a guaranteed zener voltage range of 11.4 V to 12.6 V at a test current of 50 mA, with a nominal value of 12 V. This ±5% tolerance is verified per Taiwan Semiconductor's A2311 specification sheet and applies under standard 25°C ambient conditions.
Is MMSZ4699 RHG compatible with lead-free reflow processes?
Yes, the MMSZ4699 RHG features matte tin-plated leads compliant with J-STD-002 and supports standard lead-free reflow profiles. Its moisture sensitivity level is rated at Level 1 per J-STD-020, meaning it can be stored indefinitely in dry pack and requires no baking prior to assembly.
What is the maximum reverse leakage current for MMSZ4699 RHG?
The MMSZ4699 RHG exhibits a maximum reverse leakage current of 9.1 µA when biased at 9.1 V (0.75 × VZ,nom). This value is specified in the official electrical characteristics table and measured at 25°C ambient temperature.
Does MMSZ4699 RHG have a defined dynamic impedance?
Dynamic impedance (ZZK) is not explicitly published for MMSZ4699 RHG in the provided documentation. However, curve Fig.4 in the datasheet shows typical Zener impedance versus voltage for the family, indicating values below 25 Ω near 12 V at 50 mA - consistent with standard 500 mW Zener performance.
Can MMSZ4699 RHG replace older MMSZ4699 variants?
Yes, MMSZ4699 RHG is the current qualified version of the MMSZ4699 device, with ordering code RHG denoting SOD-123 packaging and tape-and-reel delivery. It supersedes prior date codes and maintains identical electrical, thermal, and mechanical specifications per Version A2311 documentation.
MMSZ4699 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):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 9.1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ4699 RHG FAQ
1.How can I place an order for MMSZ4699 RHG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4699 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 MMSZ4699 RHG reliable?
The price and inventory of MMSZ4699 RHG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4699 RHG is usually 5 days.
3.What payment methods are accepted for MMSZ4699 RHG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4699 RHG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4699 RHG?
MMSZ4699 RHG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4699 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 MMSZ4699 RHG?
For technical support, including MMSZ4699 RHG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4699 RHG requirements.
6.How does Aetrix verify that MMSZ4699 RHG is sourced from the original manufacturer or authorized distributors?
All MMSZ4699 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 MMSZ4699 RHG meets industry standards.
7.What is the process for return or replacement of MMSZ4699 RHG?
All MMSZ4699 RHG units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4699 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 MMSZ4699 RHG part is unused and in its original packaging.
Return procedure for MMSZ4699 RHG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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