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onsemi MMSZ4707T1
- Part No.:
- MMSZ4707T1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4707T1.pdf
- Description:
- DIODE ZENER 20V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,837
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Product details
Overview
MMSZ4707T1 from onsemi is a 20 V nominal Zener voltage regulator diode in SOD−123 package, rated for 500 mW power dissipation at 75°C, with 50 µA test current (IZT), 0.01 µA reverse leakage at 15.2 V, and ±5% voltage tolerance. It provides precision low-power voltage reference and overvoltage clamping in space-constrained DC power rails.
For engineers reviewing the MMSZ4707T1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy at IZT = 50 µA, low IR at VR = 15.2 V, thermal derating behavior above 75°C, and SOD−123 footprint compatibility with automated placement.
Technical Context
This device operates as a two-terminal, silicon planar Zener diode optimized for stable reverse-bias regulation. Its junction design delivers tight voltage tolerance (±5%) and low dynamic impedance (ZZT ≈ 50 Ω at 20 mA) across −55°C to +150°C operating range.
The SOD−123 package enables high-density mounting with 1.60 mm × 2.69 mm footprint and 1.16 mm height. Thermal resistance is 340°C/W (junction-to-ambient) and 150°C/W (junction-to-lead), supporting reliable operation under pulsed surge conditions up to 1 W for 1 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.0–21.0 V @ IZT = 50 µA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - maximum continuous power on FR−5 board before thermal derating begins |
| Reverse Leakage (IR) | 0.01 µA @ VR = 15.2 V - ensures minimal standby current in voltage-sense or bias networks |
| Dynamic Impedance (ZZT) | ≈50 Ω @ IZ = 20 mA - determines regulation stiffness and AC ripple rejection capability |
| Temperature Coefficient | +5.2 mV/°C (typ.) - quantifies VZ drift over temperature; enables compensation in precision references |
| ESD Rating | Class 3 (>16 kV HBM) - supports robust handling during PCB assembly without additional protection |
Pinout & Package
SOD−123 surface-mount package: 2-lead, void-free thermosetting plastic case, cathode indicated by polarity band, UL 94 V−0 flammability rating, 260°C max soldering temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low IZT test current | 50 µA enables regulation in ultra-low-power sensor bias and microcontroller reset circuits |
| Pb−Free & RoHS compliant | Meets global environmental compliance requirements without lead-based solder compatibility compromises |
| High ESD immunity | Class 3 (>16 kV HBM) eliminates need for external ESD protection in handheld and industrial interfaces |
| Thermal stability | Rated for −55°C to +150°C TJ range - suitable for under-hood automotive and industrial control environments |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 20 V reference for ADC voltage dividers and analog front-end calibration in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing precise scaling point for signal conditioning. Use Value: ±5% VZ tolerance and <0.01 µA leakage ensure measurement accuracy and multi-year battery life. |
Use Scenario: Protecting 18 V-rated microcontroller I/O pins from transient surges in 24 V industrial PLC backplanes. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage excursions above 21 V threshold. Use Value: 500 mW rating and 150°C max TJ allow sustained clamping without thermal runaway during repeated transients. |
| Microcontroller Reset Circuit | Current Source Bias |
Use Scenario: Generating clean, temperature-stable reset signal for ARM Cortex-M0+ MCUs operating from unregulated 24 V supply rails. IC Role / Device Role / Timing Role: Zener-based voltage monitor triggering external reset IC when input drops below 19 V. Use Value: Low 50 µA IZT minimizes quiescent current while maintaining fast response to brown-out events. |
Use Scenario: Setting bias current for low-noise op-amp input stages in medical-grade ECG amplifiers. IC Role / Device Role / Timing Role: Constant-current source formed with series resistor and MMSZ4707T1 regulating node voltage. Use Value: 50 Ω dynamic impedance ensures stable current despite load variations and supply ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C20 | 20 V nominal, ±5%, 300 mW rating, SOD-323 package, 100 nA IR @ 16 V | Lower power rating and smaller footprint limit use in higher-current clamping; better suited for portable RF modules | Select when board area is constrained and peak power <300 mW; verify thermal margin on FR-4 vs FR-5 |
| 1N4746A | 20 V nominal, ±5%, 1 W rating, DO-41 through-hole package, 5 µA IR @ 16 V | Larger size and through-hole mounting require layout redesign; higher IR increases standby loss | Choose for legacy designs requiring through-hole assembly or >500 mW continuous dissipation |
Compared with BZX584C20 and 1N4746A, the MMSZ4707T1 offers optimal balance of SMD manufacturability, 500 mW capability, and sub-µA leakage-making it preferred for modern high-density, low-power industrial and automotive control boards.
Availability
MMSZ4707T1 is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMSZ4707T1 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 supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MMSZ4xxxT1G series was designed specifically for high-reliability, low-power voltage regulation in space-constrained surface-mount applications-emphasizing tight Zener tolerance, low leakage, and AEC-Q101 readiness for automotive use.
FAQ
What is the exact Zener voltage range for MMSZ4707T1 at 50 µA test current?
The MMSZ4707T1 has a guaranteed Zener voltage range of 19.0 V to 21.0 V when tested at IZT = 50 µA and TA = 25°C. This ±5% tolerance is specified in the Electrical Characteristics table on page 3 of the official onsemi datasheet. The nominal value is 20 V, and this range remains valid across the full operating temperature range of −55°C to +150°C, with temperature coefficient of +5.2 mV/°C.
Is MMSZ4707T1 suitable for automotive applications?
Yes, the MMSZ4707T1 is qualified to AEC−Q101 standards and PPAP capable, making it suitable for automotive applications including body electronics and infotainment power management. Its SOD−123 package, −55°C to +150°C operating range, and Class 3 ESD rating meet stringent automotive reliability requirements. Note that the SZ-prefix variant (SZMMSZ4707T1G) is explicitly designated for automotive use with enhanced process controls.
What is the maximum reverse leakage current for MMSZ4707T1 and at what voltage is it measured?
The maximum reverse leakage current (IR) for MMSZ4707T1 is 0.01 µA, measured at VR = 15.2 V and TA = 25°C. This ultra-low leakage supports energy-sensitive applications such as battery-backed real-time clocks and always-on sensor monitors. Leakage remains below 1 µA up to 19 V, per typical characteristics in Figure 7 of the datasheet.
Can MMSZ4707T1 be used in place of MMSZ4706T1G or MMSZ4708T1G?
No direct substitution is recommended without circuit validation, as MMSZ4706T1G (19 V nominal) and MMSZ4708T1G (22 V nominal) have different Zener voltage ranges. The MMSZ4707T1's 19.0–21.0 V range is distinct and calibrated for 20 V systems. Swapping alters regulation threshold and may affect overvoltage protection margins or reference accuracy in precision circuits.
What is the thermal derating behavior of MMSZ4707T1 above 75°C?
MMSZ4707T1 derates linearly at 6.7 mW/°C above TL = 75°C, reducing maximum allowable power dissipation to zero at approximately 148°C (calculated from 500 mW ÷ 6.7 mW/°C ≈ 74.6°C rise). This derating applies to FR−5 board mounting with minimum recommended footprint. Derating curves are shown in Figure 3 of the datasheet, confirming safe operation up to +150°C junction temperature with appropriate board thermal design.
MMSZ4707T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 nA @ 15.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ4707T1 FAQ
1.How can I place an order for MMSZ4707T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4707T1 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 MMSZ4707T1 reliable?
The price and inventory of MMSZ4707T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4707T1 is usually 5 days.
3.What payment methods are accepted for MMSZ4707T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4707T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4707T1?
MMSZ4707T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4707T1 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 MMSZ4707T1?
For technical support, including MMSZ4707T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4707T1 requirements.
6.How does Aetrix verify that MMSZ4707T1 is sourced from the original manufacturer or authorized distributors?
All MMSZ4707T1 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 MMSZ4707T1 meets industry standards.
7.What is the process for return or replacement of MMSZ4707T1?
All MMSZ4707T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4707T1, 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 MMSZ4707T1 part is unused and in its original packaging.
Return procedure for MMSZ4707T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ4707T1 Tags
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