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onsemi MMSZ4704T1
- Part No.:
- MMSZ4704T1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4704T1.pdf
- Description:
- DIODE ZENER 17V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,777
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Product details
Overview
MMSZ4704T1 from onsemi is a 17 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), 0.05 µA leakage at 12.9 V reverse bias, and ±10% voltage tolerance. It provides precision low-power voltage reference and overvoltage protection in space-constrained DC supply rails.
For engineers reviewing the MMSZ4704T1 datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy at IZT = 50 µA, thermal derating behavior above 75°C, low-leakage performance below VR = 12.9 V, and compatibility with automated SMT assembly on FR-4/FR-5 boards.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 17 V nominal Zener voltage (16.15–17.85 V range) is specified at IZT = 50 µA and TA = 25°C, with temperature coefficient near zero crossing around 17 V.
The device exhibits dynamic impedance (ZZT) of approximately 40 Ω at IZ = 20 mA and 1 kHz, and junction-to-ambient thermal resistance of 340°C/W. Its ESD rating exceeds 16 kV per Human Body Model, supporting robust handling in high-volume manufacturing environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.15–17.85 V @ IZT = 50 µA - defines regulated output voltage window under standard test condition |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - maximum continuous power on FR-5 board before thermal derating applies |
| Reverse Leakage (IR) | 0.05 µA @ VR = 12.9 V - ensures minimal quiescent current draw in standby voltage-clamp circuits |
| Dynamic Impedance (ZZT) | ~40 Ω @ IZ = 20 mA, f = 1 kHz - determines regulation stiffness against load transients |
| Thermal Resistance (RJA) | 340°C/W - quantifies junction-to-ambient heat transfer limitation for PCB layout thermal design |
| ESD Rating | Class 3 (>16 kV HBM) - supports direct handling without special ESD controls during SMT line setup |
Pinout & Package
SOD−123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant finish; cathode indicated by polarity band; Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to higher-potential node in shunt regulation; carries reverse current during clamping |
| 2 (Anode) | Reference/ground terminal | Typically tied to system ground or lower-voltage rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low IZT operation | 50 µA test current enables regulation in ultra-low-power sensor biasing and battery-monitoring circuits |
| Stable 17 V reference | Nominal 17 V with ±10% tolerance supports industrial 15–18 V supply rail monitoring and clamp thresholds |
| Automated assembly optimized | SOD−123 footprint and lead-free finish ensure reliable reflow soldering and AOI inspection compatibility |
| High ESD immunity | Class 3 (>16 kV HBM) eliminates need for post-assembly ESD mitigation in consumer and IoT end equipment |
Applications
| Industrial Sensor Signal Conditioning | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Stabilizing reference voltage for 16-bit ADC front-end in programmable logic controller analog input modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 17 V rail clamp and bias point for op-amp gain stages. Use Value: Maintains <±0.5% reference stability across −40°C to +85°C ambient, enabling sub-LSB measurement accuracy. |
Use Scenario: Overvoltage protection on VCONN line in USB-C receptacle designs operating up to 20 V. IC Role / Device Role / Timing Role: Fast-response transient voltage suppressor clamping VCONN to safe level during hot-plug events. Use Value: Limits peak voltage to ≤17.85 V with <10 ns response, preventing damage to USB PD controller ICs. |
| Automotive Body Control Module (BCM) | Medical Wearable Battery Monitor |
Use Scenario: Voltage threshold detection for 12 V battery health monitoring in BCM microcontroller I/O protection circuitry. IC Role / Device Role / Timing Role: Zener-based comparator input clamp ensuring consistent trip point despite battery voltage sag. Use Value: Enables reliable low-battery warning at 16.15 V with <0.1 µA leakage, minimizing parasitic drain on 12 V lead-acid battery. |
Use Scenario: Precision voltage reference for lithium-ion cell voltage sensing in compact wearable ECG patch. IC Role / Device Role / Timing Role: Low-current Zener source for ADC reference divider network in ultra-low-power sleep mode. Use Value: Delivers stable 17 V reference at 50 µA IZT, reducing system current consumption by 40% vs. standard 20 mA Zeners. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C16LT1G | 16 V nominal Zener, ±5% tolerance, 300 mW rating, SOT-23 package | Lower voltage and power rating; tighter tolerance but reduced surge capability | Select when tighter 16 V regulation is required and board space allows SOT-23 footprint |
| MMSZ5247BT1G | 20 V nominal Zener, ±5% tolerance, 500 mW rating, same SOD−123 package | Higher clamping voltage; identical thermal and assembly characteristics | Choose for 20 V rail protection where MMSZ4704T1's 17 V threshold is insufficient |
Compared with BZX84-C16LT1G and MMSZ5247BT1G, the MMSZ4704T1 offers the unique combination of 17 V nominal regulation, ±10% tolerance, and full 500 mW SOD−123 power handling-making it optimal for mid-range industrial voltage supervision where 16 V is too low and 20 V is excessive.
Availability
MMSZ4704T1 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB-C power delivery systems, automotive body control modules, and medical wearable battery monitors requiring stable component supply and long-term obsolescence management.
Supply support for MMSZ4704T1 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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The MMSZ4xxxT1G series was designed specifically for high-reliability, low-power voltage reference and overvoltage protection in space-constrained surface-mount applications demanding AEC-Q101 qualification and robust ESD performance.
FAQ
What is the exact Zener voltage range for MMSZ4704T1 at 50 µA test current?
The MMSZ4704T1 has a guaranteed Zener voltage range of 16.15 V to 17.85 V when measured at IZT = 50 µA and TA = 25°C. This ±10% tolerance reflects the device's nominal 17 V rating and is validated per onsemi's production testing protocol. The MMSZ4704T1 maintains this specification across its qualified operating temperature range of −55°C to +150°C, with voltage drift compensated by its near-zero temperature coefficient near 17 V.
Is MMSZ4704T1 suitable for automotive applications?
Yes, the MMSZ4704T1 is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including body control modules and infotainment power rail supervision. Its SOD−123 package meets automotive thermal and mechanical stress requirements, and its 17 V Zener voltage supports common 12 V system overvoltage thresholds. The MMSZ4704T1 also complies with RoHS and is Pb-free, satisfying automotive environmental compliance mandates.
What is the maximum reverse leakage current for MMSZ4704T1 at 12.9 V?
The maximum reverse leakage current (IR) for MMSZ4704T1 is 0.05 µA when biased at VR = 12.9 V and TA = 25°C. This ultra-low leakage ensures minimal power loss in always-on monitoring circuits and extends battery life in portable applications. The MMSZ4704T1 maintains this performance across its full storage temperature range, with leakage increasing only marginally up to +85°C ambient.
Can MMSZ4704T1 be used in place of MMSZ4703T1G?
No-MMSZ4704T1 is not a drop-in replacement for MMSZ4703T1G. While both share the SOD−123 package and 500 mW rating, MMSZ4703T1G has a 16 V nominal Zener voltage (15.2–16.8 V range), whereas MMSZ4704T1 is rated at 17 V (16.15–17.85 V). Substituting the MMSZ4704T1 would raise the clamping threshold by ~1 V, potentially compromising circuit protection margins. Always verify voltage tolerance alignment before interchanging Zener diodes.
What is the thermal derating behavior of MMSZ4704T1 above 75°C?
MMSZ4704T1 derates linearly at 6.7 mW/°C above TL = 75°C, reducing maximum allowable power dissipation to zero at approximately 148°C. This derating curve is defined for FR-5 board mounting with minimum recommended footprint. The MMSZ4704T1's junction-to-ambient thermal resistance of 340°C/W means that at 100°C ambient, its usable power drops to ~333 mW-critical for thermal design validation in enclosed industrial enclosures.
MMSZ4704T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 17 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.9 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
MMSZ4704T1 FAQ
1.How can I place an order for MMSZ4704T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4704T1 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 MMSZ4704T1 reliable?
The price and inventory of MMSZ4704T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4704T1 is usually 5 days.
3.What payment methods are accepted for MMSZ4704T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4704T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4704T1?
MMSZ4704T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4704T1 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 MMSZ4704T1?
For technical support, including MMSZ4704T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4704T1 requirements.
6.How does Aetrix verify that MMSZ4704T1 is sourced from the original manufacturer or authorized distributors?
All MMSZ4704T1 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 MMSZ4704T1 meets industry standards.
7.What is the process for return or replacement of MMSZ4704T1?
All MMSZ4704T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4704T1, 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 MMSZ4704T1 part is unused and in its original packaging.
Return procedure for MMSZ4704T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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