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onsemi MMSZ4714T1
- Part No.:
- MMSZ4714T1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4714T1.pdf
- Description:
- DIODE ZENER 33V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
MMSZ4714T1 from onsemi is a 33 V ±5% Zener voltage regulator diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 50 µA test current (IZT), 25.0 V reverse voltage (VR) at 1 µA leakage, and −55°C to +150°C operating temperature range-used for precision voltage reference and overvoltage protection in low-power analog sensor interfaces.
For engineers reviewing the MMSZ4714T1 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance, dynamic impedance at 1 mA/5 mA/20 mA, temperature coefficient near zero-crossing (~0.2 mV/°C at 33 V), and SOD−123 thermal resistance (RJL = 150°C/W).
Technical Context
The MMSZ4714T1 operates as a two-terminal silicon Zener diode optimized for stable reverse-bias regulation. Its 33 V nominal Zener voltage falls within the positive temperature coefficient region (> ~5.6 V), exhibiting +8.5 mV/°C typical TC per Figure 1, and maintains < 100 Ω dynamic impedance (ZZT) at IZ = 1 mA per Figure 5.
Designed for surface-mount assembly on FR-4/FR-5 boards, it delivers 500 mW power rating with 6.7 mW/°C derating above 75°C ambient, junction-to-lead thermal resistance of 150°C/W, and ESD robustness >16 kV HBM-enabling reliable operation in space-constrained industrial control and automotive body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 31.35 V min / 33 V nom / 34.65 V max @ IZT = 50 µA - defines tight 5% tolerance band for stable reference accuracy |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - supports continuous regulation in thermally constrained PCB layouts |
| Reverse Leakage (IR) | ≤ 0.01 µA @ VR = 25.0 V - ensures minimal quiescent current draw in battery-powered circuits |
| Dynamic Impedance (ZZT) | ≤ 100 Ω @ IZ = 1 mA - maintains low AC impedance for noise-sensitive analog references |
| Temperature Coefficient | +8.5 mV/°C typical @ 33 V - enables predictable drift compensation in wide-temperature environments |
| Junction Temp Range | −55°C to +150°C - qualified for under-hood automotive and industrial motor drive applications |
Pinout & Package
SOD−123 plastic surface-mount package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case, cathode indicated by polarity band, UL 94 V−0 flammability rating, Pb−Free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; accepts reverse bias for Zener conduction |
| 2 (Non-banded End) | Anode | Connected to circuit ground or lower potential; completes bias path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low IZT Test Current | 50 µA enables stable regulation in ultra-low-power sensor bias networks |
| ESD Robustness | Class 3 (>16 kV HBM) supports direct integration into exposed I/O lines without external protection |
| Thermal Performance | RJL = 150°C/W allows efficient heat transfer to PCB copper, reducing local hot spots |
| Automated Assembly Fit | SOD−123 footprint optimized for high-yield pick-and-place and reflow soldering |
Applications
| Industrial Sensor Reference | Automotive Body Control |
|---|---|
Use Scenario: Precision 3.3 V or 5 V rail monitoring in factory automation transmitters. IC Role / Device Role / Timing Role: Zener voltage reference providing stable threshold for comparator-based fault detection. Use Value: 5% VZ tolerance and <0.01 µA IR ensure sub-10 ppm baseline drift over temperature and time. |
Use Scenario: Overvoltage clamp on LIN bus or door module power input. IC Role / Device Role / Timing Role: Transient suppression device limiting supply rail to ≤35 V during load dump events. Use Value: 500 mW rating and 150°C max TJ enable sustained clamping without thermal runaway. |
| Portable Medical Instrumentation | Smart Energy Metering |
Use Scenario: Battery voltage supervision in handheld diagnostic tools with coin-cell backup. IC Role / Device Role / Timing Role: Low-current Zener shunt regulator establishing reference for ADC measurement scaling. Use Value: 50 µA IZT and 0.01 µA IR minimize standby current, extending battery life beyond 2 years. |
Use Scenario: Voltage reference for metrology-grade current sensing in DIN-rail meters. IC Role / Device Role / Timing Role: Stable 33 V Zener source feeding precision resistor divider network. Use Value: +8.5 mV/°C TC aligns with complementary TC of metal-film resistors for net-zero system drift. |
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-C33 | 33 V ±5%, SOT-23 package, 300 mW rating, higher ZZT (~120 Ω @ 5 mA) | Limited power handling; unsuitable for >100 mA surge conditions | Select when board space permits SOT-23 and thermal load remains below 300 mW |
| 1N4742A | 33 V ±5%, DO-41 through-hole, 1 W rating, slower thermal response | Requires manual insertion or wave soldering; incompatible with automated SMT lines | Select only for legacy through-hole designs or prototyping where rework tolerance is critical |
Compared with BZX84-C33 and 1N4742A, the MMSZ4714T1 offers superior thermal performance (RJL = 150°C/W vs. >200°C/W), tighter leakage control (0.01 µA vs. ≥0.1 µA), and SMT compatibility-making it optimal for high-density, thermally demanding, and production-scale applications.
Availability
MMSZ4714T1 is available at Aetrix Electronics and suitable for industrial sensor reference, automotive body control, and portable medical instrumentation requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for MMSZ4714T1 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZ4xxxT1G series was designed specifically for compact, high-reliability Zener regulation in surface-mount systems-emphasizing low leakage, tight voltage tolerance, and robust ESD immunity for mission-critical edge nodes.
FAQ
What is the exact Zener voltage tolerance of the MMSZ4714T1?
The MMSZ4714T1 has a guaranteed Zener voltage range of 31.35 V (min) to 34.65 V (max) at IZT = 50 µA and TA = 25°C, corresponding to ±5% tolerance around the nominal 33 V value. This tolerance remains valid across the full −55°C to +150°C operating temperature range per onsemi's characterization data.
Does the MMSZ4714T1 meet automotive qualification standards?
The MMSZ4714T1 is not AEC-Q101 qualified; however, its SZ-prefixed counterpart SZMMSZ4714T1G is AEC-Q101 qualified and PPAP capable. The MMSZ4714T1 shares identical electrical and thermal specifications but lacks the automotive-specific process controls and documentation required for automotive use.
What is the maximum reverse leakage current for the MMSZ4714T1 at 25 V?
The MMSZ4714T1 exhibits a maximum reverse leakage current (IR) of 0.01 µA when biased at VR = 25.0 V and TA = 25°C. This ultra-low leakage is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet and supports multi-year battery operation in always-on sensing nodes.
Can the MMSZ4714T1 be used in place of the MMSZ4714T1G?
No-the MMSZ4714T1 is obsolete and superseded by the Pb-Free, RoHS-compliant MMSZ4714T1G. The "G" suffix denotes lead-free packaging and updated manufacturing compliance; the MMSZ4714T1 lacks this certification and is no longer supported for new designs per onsemi's product change notices.
What is the thermal resistance from junction to lead (RJL) for the MMSZ4714T1?
The MMSZ4714T1 has a measured junction-to-lead thermal resistance (RJL) of 150°C/W, as specified in the Maximum Ratings table on page 1 of the onsemi datasheet. This value enables accurate thermal modeling when the cathode/anode leads are connected to large copper pours for enhanced heat dissipation.
MMSZ4714T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 nA @ 25 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
MMSZ4714T1 FAQ
1.How can I place an order for MMSZ4714T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4714T1 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 MMSZ4714T1 reliable?
The price and inventory of MMSZ4714T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4714T1 is usually 5 days.
3.What payment methods are accepted for MMSZ4714T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4714T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4714T1?
MMSZ4714T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4714T1 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 MMSZ4714T1?
For technical support, including MMSZ4714T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4714T1 requirements.
6.How does Aetrix verify that MMSZ4714T1 is sourced from the original manufacturer or authorized distributors?
All MMSZ4714T1 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 MMSZ4714T1 meets industry standards.
7.What is the process for return or replacement of MMSZ4714T1?
All MMSZ4714T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4714T1, 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 MMSZ4714T1 part is unused and in its original packaging.
Return procedure for MMSZ4714T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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