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onsemi MMSZ4717T1
- Part No.:
- MMSZ4717T1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4717T1.pdf
- Description:
- DIODE ZENER 43V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,100
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Product details
Overview
MMSZ4717T1 from onsemi is a 43 V nominal Zener voltage regulator diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 50 µA test current (IZT), 0.01 µA reverse leakage at 32.6 V, and ±5% Zener voltage tolerance. It serves as a precision voltage reference or overvoltage clamp in low-power analog sensing circuits.
For engineers reviewing the MMSZ4717T1 datasheet, pinout, applications, or equivalent options, key selection criteria include its 43 V nominal Zener voltage, low 0.01 µA IR at VR = 32.6 V, SOD−123 thermal resistance (RJA = 340°C/W), and AEC−Q101 qualification for automotive-grade stability.
Technical Context
This device operates as a two-terminal, silicon planar Zener diode optimized for stable reverse-bias regulation. Its junction temperature range spans −55°C to +150°C, and it exhibits a positive temperature coefficient above ~5 V, confirmed by typical TC curves peaking near +5 mV/°C at 43 V.
The SOD−123 package enables automated placement with cathode polarity band marking, and its 1.60 × 2.69 × 1.16 mm footprint supports high-density PCB layouts. Thermal derating begins at 75°C at 6.7 mW/°C, consistent with FR−5 board mounting per datasheet Note 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 40.85–45.15 V @ IZT = 50 µA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - maximum steady-state power before thermal derating applies |
| Reverse Leakage (IR) | 0.01 µA @ VR = 32.6 V - ensures minimal standby current in clamping or reference applications |
| Junction Temp Range | −55°C to +150°C - supports operation in under-hood automotive or industrial ambient environments |
| Thermal Resistance (RJA) | 340°C/W - determines junction-to-ambient temperature rise per watt dissipated on FR−5 board |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling during assembly without external protection |
Pinout & Package
SOD−123 surface-mount package: 2-lead, void-free thermosetting plastic case; cathode indicated by polarity band; 1.60 × 2.69 × 1.16 mm outline; UL 94 V−0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; accepts reverse bias for Zener conduction |
| 2 (Non-banded End) | Anode | Connected to circuit ground or lower potential; completes Zener current path |
Key Features
| Feature | Design Value |
|---|---|
| Low IZT test current | 50 µA enables stable regulation in ultra-low-power sensor biasing and battery-monitoring circuits |
| Pb−Free & RoHS compliant | Meets global environmental compliance requirements without lead-based solder compatibility compromises |
| AEC−Q101 qualified | Validated for automotive electronics use including engine control modules and body electronics |
| High ESD immunity | Class 3 (>16 kV HBM) eliminates need for discrete ESD protection in many front-end interface designs |
Applications
| Automotive Sensor Reference | Industrial Analog Input Protection |
|---|---|
Use Scenario: Providing stable 43 V reference for fuel rail pressure transducer signal conditioning in engine control units. IC Role / Device Role / Timing Role: Zener diode acting as precision shunt reference and overvoltage clamp. Use Value: Maintains reference accuracy across −40°C to +125°C ambient while limiting transient-induced damage from load dump events. |
Use Scenario: Clamping input voltage to PLC analog input channels exposed to 48 V field wiring surges. IC Role / Device Role / Timing Role: Two-terminal shunt protector absorbing surge energy before downstream ADC or op-amp stages. Use Value: Limits peak voltage to ≤45.15 V with <0.01 µA leakage, preserving measurement integrity during normal operation. |
| Portable Medical Device Power Supervision | Telecom DC-DC Feedback Stabilization |
Use Scenario: Monitoring battery pack voltage in portable ultrasound devices using 43 V Zener threshold detection. IC Role / Device Role / Timing Role: Voltage supervisor element triggering low-battery alerts via comparator input. Use Value: Delivers tight ±5% VZ tolerance and sub-nA leakage to extend battery life without compromising alert accuracy. |
Use Scenario: Stabilizing feedback node of isolated 48 V to 3.3 V DC-DC converter in optical line terminal equipment. IC Role / Device Role / Timing Role: Secondary-side Zener reference improving regulation accuracy under light-load conditions. Use Value: Reduces output voltage drift by replacing generic 43 V references with onsemi's characterized TC curve and low dynamic impedance. |
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-C43 | Same 43 V nominal Zener, but SOT−23 package (RJA = 350°C/W), higher IR = 0.1 µA @ VR = 34.4 V | Limited to lower-power PCBs due to larger thermal resistance; less suitable for high-density SOD−123 layouts | Select BZX84-C43 only if SOT−23 footprint is already standardized and thermal margin permits 0.1 µA leakage. |
| SZMMSZ4717T1G | Identical electrical specs and SOD−123 package; differs only in SZ prefix indicating AEC−Q101 PPAP-capable automotive traceability | Required for Tier-1 automotive programs needing full PPAP documentation and lot-level control | Choose SZMMSZ4717T1G when automotive OEM sourcing mandates PPAP compliance; otherwise MMSZ4717T1 suffices. |
Compared with BZX84-C43 and SZMMSZ4717T1G, the MMSZ4717T1 offers optimal balance of low leakage (0.01 µA), compact SOD−123 footprint, and industrial-grade qualification-making it preferred for space-constrained, low-leakage applications where full PPAP is not required.
Availability
MMSZ4717T1 is available at Aetrix Electronics and suitable for automotive sensor reference, industrial analog input protection, and portable medical device power supervision requiring stable component supply and long-term lifecycle support.
Supply support for MMSZ4717T1 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, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MMSZ4xxxT1G series was designed specifically for high-reliability, surface-mount Zener regulation in space-constrained applications-emphasizing low IZT, tight VZ tolerance, and AEC−Q101 readiness for automotive electronics.
FAQ
What is the nominal Zener voltage of the MMSZ4717T1?
The MMSZ4717T1 has a nominal Zener voltage of 43 V, with a guaranteed range of 40.85 V to 45.15 V measured at IZT = 50 µA and TA = 25°C. This value is specified in the Electrical Characteristics table on page 3 of the official onsemi datasheet, and the MMSZ4717T1 maintains this regulation performance across its full operating temperature range of −55°C to +150°C.
Is the MMSZ4717T1 RoHS compliant and lead-free?
Yes, the MMSZ4717T1 is Pb−Free and RoHS compliant, as confirmed in the "Features" section and "Mechanical Characteristics" of the onsemi datasheet. The "G" suffix in the full part number MMSZ4717T1G explicitly denotes the Pb−Free version, and the device meets all applicable EU RoHS Directive requirements without exemption.
What is the maximum power dissipation rating for the MMSZ4717T1?
The MMSZ4717T1 is rated for 500 mW total power dissipation on FR−5 board at TL = 75°C, with linear derating of 6.7 mW/°C above that temperature. This rating assumes use of the minimum recommended footprint per datasheet Note 1 and accounts for the SOD−123 package's thermal resistance of RJA = 340°C/W.
Does the MMSZ4717T1 have automotive qualification?
The MMSZ4717T1 itself is not AEC−Q101 qualified; however, its automotive-grade variant SZMMSZ4717T1G is fully AEC−Q101 qualified and PPAP capable. The base MMSZ4717T1 shares identical electrical and mechanical specifications but lacks the enhanced traceability and process controls required for automotive OEM programs.
What is the reverse leakage current specification for the MMSZ4717T1?
The MMSZ4717T1 specifies a reverse leakage current (IR) of 0.01 µA maximum at VR = 32.6 V and TA = 25°C. This ultra-low leakage is critical for battery-powered systems and high-impedance reference nodes, and it is verified per the Electrical Characteristics table on page 3 of the onsemi datasheet.
MMSZ4717T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 nA @ 32.6 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
MMSZ4717T1 FAQ
1.How can I place an order for MMSZ4717T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4717T1 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 MMSZ4717T1 reliable?
The price and inventory of MMSZ4717T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4717T1 is usually 5 days.
3.What payment methods are accepted for MMSZ4717T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4717T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4717T1?
MMSZ4717T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4717T1 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 MMSZ4717T1?
For technical support, including MMSZ4717T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4717T1 requirements.
6.How does Aetrix verify that MMSZ4717T1 is sourced from the original manufacturer or authorized distributors?
All MMSZ4717T1 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 MMSZ4717T1 meets industry standards.
7.What is the process for return or replacement of MMSZ4717T1?
All MMSZ4717T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4717T1, 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 MMSZ4717T1 part is unused and in its original packaging.
Return procedure for MMSZ4717T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ4717T1 Tags
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