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onsemi MMSZ47T1G
- Part No.:
- MMSZ47T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ47T1G.pdf
- Description:
- DIODE ZENER 47V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:1,683
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Product details
Overview
MMSZ47T1G from onsemi is a 47 V ±5% Zener voltage regulator diode in SOD−123 surface-mount package, rated for 500 mW power dissipation at 75°C, with 170 Ω maximum dynamic impedance at 2 mA test current and 0.05 μA reverse leakage at 32.9 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power management circuits.
For engineers reviewing the MMSZ47T1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, AEC−Q101 qualification status, ESD robustness (Class 3, >16 kV HBM), and direct alternative part comparisons - all grounded in onsemi's June 2024 Rev. 13 datasheet.
Technical Context
The MMSZ47T1G operates as a two-terminal silicon Zener diode optimized for stable reverse-biased regulation. Its nominal 47 V Zener voltage is specified at IZT = 2 mA with ±5% tolerance, and its temperature coefficient is +3.7 mV/°C (typical) across −55°C to +150°C junction range.
It exhibits 170 Ω dynamic impedance (ZZT) at 2 mA and 375 Ω at 0.1 mA, with reverse leakage capped at 0.05 μA when biased at 32.9 V. Thermal resistance is 340°C/W (junction-to-ambient) and 150°C/W (junction-to-lead), supporting reliable operation under pulsed or continuous DC loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44.65–49.35 V @ IZT = 2 mA; enables precise 47 V reference clamping in feedback loops or protection circuits |
| Power Dissipation (PD) | 500 mW @ TL = 75°C; derates linearly at 6.7 mW/°C above 75°C - defines max continuous DC load in FR-5 PCB layouts |
| Zener Impedance (ZZT) | 170 Ω max @ IZT = 2 mA; determines output voltage stability under varying load current |
| Reverse Leakage (IR) | 0.05 μA max @ VR = 32.9 V; ensures minimal quiescent current draw in high-impedance bias networks |
| ESD Rating | Class 3 (>16 kV) per Human Body Model; supports robust handling and assembly without external ESD protection |
| Thermal Resistance (RJA) | 340°C/W; used to calculate junction temperature rise in thermally constrained board areas |
| AEC−Q101 Qualified | Validated for automotive-grade reliability - required for under-hood sensor references and infotainment power rails |
Pinout & Package
SOD−123 plastic surface-mount package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant finish; cathode indicated by polarity band; Pb−Free (RoHS compliant); rated for 260°C soldering (10 sec).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased during Zener operation; must be held at higher potential than anode |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes conduction path during Zener breakdown |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating on FR−5 Board | Supports sustained regulation in space-constrained consumer and industrial PCBs without forced cooling |
| ±5% Zener Voltage Tolerance | Enables predictable clamping thresholds in safety-critical overvoltage detection circuits |
| ESD Robustness (Class 3, >16 kV HBM) | Eliminates need for discrete ESD protection in front-end signal conditioning stages |
| AEC−Q101 Qualification | Meets automotive stress testing requirements for engine control, body electronics, and ADAS subsystems |
| Small SOD−123 Footprint | Enables high-density placement in multi-rail power supervisors and portable device battery monitors |
Applications
| Industrial Sensor Signal Conditioning | Automotive Battery Monitoring |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADCs measuring thermocouple or RTD outputs in PLC modules. IC Role / Device Role / Timing Role: Zener diode providing fixed 47 V reference to op-amp gain-setting network and ADC reference divider. Use Value: Maintains <±0.5% reference drift over −40°C to +85°C ambient due to low TC and tight VZ tolerance. |
Use Scenario: Overvoltage clamp on 36 V auxiliary battery rail in 48 V mild-hybrid vehicles. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing transient surges exceeding 42 V to protect CAN transceivers and microcontrollers. Use Value: Withstands 100 W non-repetitive surge (1 ms pulse) per Figure 4, preventing latch-up in downstream ICs. |
| USB-C PD Feedback Network | Medical Instrument Power Sequencing |
Use Scenario: Voltage threshold detector in USB-C Power Delivery sink controller feedback loop. IC Role / Device Role / Timing Role: Zener element setting upper limit of optocoupler input current in isolated feedback path. Use Value: Low 0.05 μA leakage ensures accurate current sensing down to 100 μA, critical for ±3% output regulation. |
Use Scenario: Power-on reset supervisor for FPGA-based patient monitoring hardware requiring clean 3.3 V rail sequencing. IC Role / Device Role / Timing Role: Reference element in RC-delayed comparator circuit triggering enable signals after 47 V rail stabilizes. Use Value: AEC−Q101 qualification and 150°C max TJ support long-term reliability in sealed, fanless enclosures. |
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-C47 | Same 47 V nominal Zener, but SOT-23 package (larger footprint, 350 mW rating), ±5% tolerance, 200 Ω ZZT @ 5 mA | Higher power handling at cost of board area; less suitable for ultra-dense layouts where SOD−123 is mandated | Select BZX84-C47 only if thermal margin exceeds 150 mW and SOT-23 footprint is acceptable. |
| MMBZ5270BS | 47 V Zener in SOT-323 (1.3 × 1.7 × 0.9 mm), 200 mW rating, ±5%, 220 Ω ZZT @ 200 μA - lower power, smaller size | Optimized for ultra-low-current bias networks (<100 μA), not for 2 mA regulation or surge absorption | Choose MMBZ5270BS only for micropower references where leakage <0.1 μA and size < SOD−123 are primary constraints. |
Compared with BZX84-C47 and MMBZ5270BS, the MMSZ47T1G uniquely balances 500 mW dissipation, SOD−123 compactness, Class 3 ESD, and AEC−Q101 compliance - making it the only option qualified for automotive under-hood voltage clamping at 47 V with no layout compromise.
Availability
MMSZ47T1G is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive battery monitoring systems, and USB-C PD feedback networks requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for MMSZ47T1G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZxxxT1G series was designed specifically for high-reliability, surface-mount Zener regulation in space-constrained and thermally demanding environments - emphasizing AEC−Q101 qualification, ESD hardness, and tight voltage tolerance.
FAQ
What is the Zener voltage tolerance of the MMSZ47T1G?
The MMSZ47T1G has a nominal Zener voltage of 47 V with a standard tolerance of ±5%, meaning the actual measured VZ falls between 44.65 V and 49.35 V when tested at IZT = 2 mA and TA = 25°C. This tolerance is confirmed in Table 1 of the onsemi datasheet Rev. 13 and applies across the full operating temperature range.
Is the MMSZ47T1G suitable for automotive applications?
Yes, the MMSZ47T1G is AEC−Q101 qualified and PPAP capable, meeting the stress-test requirements for automotive electronics including temperature cycling, humidity bias, and mechanical shock. Its qualification makes the MMSZ47T1G appropriate for use in engine control units, body controllers, and ADAS power rails where reliability under harsh conditions is mandatory.
What is the maximum reverse leakage current for the MMSZ47T1G?
The MMSZ47T1G specifies a maximum reverse leakage current (IR) of 0.05 μA when reverse-biased at 32.9 V, as stated in the Electrical Characteristics table on page 3 of the datasheet. This ultra-low leakage supports high-impedance bias networks and precision reference designs where current draw must remain below 100 nA.
Can the MMSZ47T1G handle transient surge events?
Yes - the MMSZ47T1G can withstand non-repetitive surge power up to 100 W for 1 ms pulses (Figure 4, datasheet Rev. 13). This capability allows the MMSZ47T1G to absorb load-dump transients and ESD-induced spikes in automotive and industrial power rails without failure, provided average power remains within 500 mW limits.
What is the thermal resistance of the MMSZ47T1G?
The MMSZ47T1G has a junction-to-ambient thermal resistance (RJA) of 340°C/W and junction-to-lead resistance (RJL) of 150°C/W, measured via infrared scan method on FR-5 board. These values allow engineers to calculate junction temperature rise under real-world PCB copper pour and airflow conditions - essential for validating long-term reliability in sealed enclosures.
MMSZ47T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 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
MMSZ47T1G FAQ
1.How can I place an order for MMSZ47T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ47T1G 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 MMSZ47T1G reliable?
The price and inventory of MMSZ47T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ47T1G is usually 5 days.
3.What payment methods are accepted for MMSZ47T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ47T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ47T1G?
MMSZ47T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ47T1G 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 MMSZ47T1G?
For technical support, including MMSZ47T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ47T1G requirements.
6.How does Aetrix verify that MMSZ47T1G is sourced from the original manufacturer or authorized distributors?
All MMSZ47T1G 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 MMSZ47T1G meets industry standards.
7.What is the process for return or replacement of MMSZ47T1G?
All MMSZ47T1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ47T1G, 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 MMSZ47T1G part is unused and in its original packaging.
Return procedure for MMSZ47T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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