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onsemi MMSZ4701ET1G
- Part No.:
- MMSZ4701ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4701ET1G.pdf
- Description:
- DIODE ZENER 14V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,354
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Product details
Overview
MMSZ4701ET1G from onsemi is a 14 V, 500 mW surface-mount Zener diode in SOD−123 package, rated for 0.05 µA reverse leakage at 10.6 V, with ±5% Zener voltage tolerance and 150 °C max junction temperature. It serves as a precision voltage reference or overvoltage clamp in low-power analog sensing and power rail regulation circuits.
For engineers reviewing the MMSZ4701ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 14 V nominal Zener voltage, 50 mA test current, 150 °C operating range, ESD rating >16 kV (HBM), and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
This device operates in reverse breakdown to maintain stable voltage across its terminals under varying load or supply conditions. Its dynamic impedance is specified at 150 Ω (max) at IZT = 50 mA and 1 kHz, with temperature coefficient near +5.5 mV/°C in the 14 V range.
The SOD−123 package enables automated placement and supports thermal dissipation up to 500 mW on FR−5 board at TL = 75 °C, derating linearly above that point at 6.7 mW/°C. Junction-to-lead thermal resistance is 150 °C/W, supporting robust transient handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.3–14.7 V @ IZT = 50 mA - defines clamping threshold with ±5% tolerance for stable reference design |
| Power Dissipation (PD) | 500 mW on FR−5 board @ TL = 75 °C - sets maximum continuous DC power handling in PCB-mounted operation |
| Reverse Leakage (IR) | 0.05 µA @ VR = 10.6 V - ensures minimal quiescent current draw below Zener knee in standby mode |
| Dynamic Impedance (ZZT) | 150 Ω max @ IZT = 50 mA, f = 1 kHz - determines voltage regulation sensitivity to current changes |
| ESD Rating | Class 3 (>16 kV) per HBM - qualifies for handling in unshielded assembly environments without additional protection |
| Junction Temp Range | −55 °C to +150 °C - supports operation in under-hood automotive and industrial ambient conditions |
Pinout & Package
SOD−123 plastic surface-mount package (Case 425, Style 1), void-free thermosetting body with corrosion-resistant finish, cathode indicated by band. Dimensions: 1.40–1.80 mm width (D), 2.54–2.84 mm length (E), 0.94–1.35 mm height (A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased during Zener operation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes bias path for breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive electronics use with PPAP capability and controlled manufacturing site requirements |
| Pb−Free Packaging | RoHS-compliant SOD−123 construction with solderable finish compatible with lead-free reflow profiles |
| High ESD Robustness | Class 3 HBM rating (>16 kV) reduces need for external ESD protection in signal conditioning paths |
| Optimized for Automated Assembly | Small footprint and polarity marking support high-yield pick-and-place and AOI inspection |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage reference for microcontroller ADC inputs monitoring 12 V battery rail fluctuations. IC Role / Device Role / Timing Role: Zener diode providing stable 14 V reference to scale analog sensor signals into safe ADC input range. Use Value: Enables accurate battery state-of-charge estimation within ±1% error margin across −40 °C to +125 °C ambient. |
Use Scenario: Clamp circuit protecting op-amp inputs from transient overvoltage in 4–20 mA loop receivers. IC Role / Device Role / Timing Role: Low-leakage Zener shunt limiting input voltage to 14.7 V during surge events. Use Value: Prevents op-amp saturation and latch-up while maintaining <0.1 µA bias current error at 10.6 V operating point. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Reference |
Use Scenario: Secondary-side voltage regulation feedback element in isolated flyback converters. IC Role / Device Role / Timing Role: Zener diode setting optocoupler LED current threshold to regulate output voltage. Use Value: Delivers ±5% output accuracy over line/load/temperature with 150 °C junction capability for compact heatsinkless designs. |
Use Scenario: Precision voltage reference for calibration circuitry in portable ECG front-end amplifiers. IC Role / Device Role / Timing Role: Stable 14 V reference source for DAC output scaling and offset trimming. Use Value: Maintains <0.5% reference drift over 10-year service life due to low TC (+5.5 mV/°C) and AEC−Q101 process control. |
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-C15LT1G | 15 V nominal, ±6% tolerance, 300 mW rating, SOT−23 package | Higher voltage, lower power, larger footprint - less suitable for space-constrained 14 V references | Choose when 15 V target and SOT−23 compatibility outweigh tighter tolerance needs |
| MMSZ5242BT1G | 12 V nominal, ±5% tolerance, 500 mW, same SOD−123 package | Lower Zener voltage - requires redesign of bias network if 14 V threshold is mandatory | Prefer for cost-sensitive 12 V clamping where 2 V margin suffices |
Compared with BZX84-C15LT1G and MMSZ5242BT1G, the MMSZ4701ET1G provides exact 14 V regulation with automotive-grade reliability and superior thermal performance in the same compact SOD−123 footprint, making it optimal for precision 12 V system monitoring and clamp designs requiring tight voltage control.
Availability
MMSZ4701ET1G is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMSZ4701ET1G 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The MMSZ4xxxET1G series was designed specifically for high-reliability, surface-mount Zener regulation in space-constrained automotive and industrial systems, emphasizing AEC−Q101 compliance, low leakage, and thermal robustness.
FAQ
What is the Zener voltage tolerance of MMSZ4701ET1G?
The MMSZ4701ET1G has a nominal Zener voltage of 14 V with a tolerance of ±5%, meaning the actual measured voltage falls between 13.3 V and 14.7 V when tested at IZT = 50 mA and TA = 25 °C. This tolerance is guaranteed across the full operating temperature range and is critical for precision reference applications where voltage accuracy directly impacts system measurement fidelity.
Is MMSZ4701ET1G qualified for automotive use?
Yes, the MMSZ4701ET1G is AEC−Q101 qualified and PPAP capable, meeting the stress testing and process control requirements for automotive electronics. Its construction, thermal performance (−55 °C to +150 °C), and ESD robustness (>16 kV HBM) make it suitable for under-hood and body control applications where reliability under harsh environmental conditions is mandatory.
What is the maximum reverse leakage current for MMSZ4701ET1G?
The MMSZ4701ET1G specifies a maximum reverse leakage current of 0.05 µA at VR = 10.6 V and TA = 25 °C. This ultra-low leakage ensures minimal power loss in standby or high-impedance bias networks, preserving battery life in portable systems and preventing signal distortion in precision analog front-ends.
Can MMSZ4701ET1G replace MMSZ4702ET1G in a circuit?
No - MMSZ4701ET1G (14 V nominal) and MMSZ4702ET1G (15 V nominal) are not interchangeable without circuit validation. Their Zener voltages differ by 1 V, which affects clamping level, reference accuracy, and bias current distribution. Substitution may cause overvoltage exposure or insufficient regulation depending on the application's voltage margin requirements.
What is the thermal resistance from junction to lead for MMSZ4701ET1G?
The MMSZ4701ET1G has a junction-to-lead thermal resistance (RJL) of 150 °C/W, measured via infrared scan method. This value reflects how effectively heat transfers from the silicon die to the PCB copper through the leads, enabling accurate thermal modeling for power derating and ensuring safe operation at elevated ambient temperatures in densely packed layouts.
MMSZ4701ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.6 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
MMSZ4701ET1G FAQ
1.How can I place an order for MMSZ4701ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4701ET1G 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 MMSZ4701ET1G reliable?
The price and inventory of MMSZ4701ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4701ET1G is usually 5 days.
3.What payment methods are accepted for MMSZ4701ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4701ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4701ET1G?
MMSZ4701ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4701ET1G 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 MMSZ4701ET1G?
For technical support, including MMSZ4701ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4701ET1G requirements.
6.How does Aetrix verify that MMSZ4701ET1G is sourced from the original manufacturer or authorized distributors?
All MMSZ4701ET1G 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 MMSZ4701ET1G meets industry standards.
7.What is the process for return or replacement of MMSZ4701ET1G?
All MMSZ4701ET1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4701ET1G, 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 MMSZ4701ET1G part is unused and in its original packaging.
Return procedure for MMSZ4701ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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