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onsemi MMSZ5247BT3G
- Part No.:
- MMSZ5247BT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5247BT3G.pdf
- Description:
- DIODE ZENER 17V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:7,357
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Product details
Overview
MMSZ5247BT3G from onsemi is a 500 mW, ±5% tolerance Zener diode in SOD−123 package, rated for 17 V nominal reverse breakdown voltage at 7.4 mA test current, with 19 Ω dynamic impedance and 0.1 μA leakage at 13 V reverse bias - used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMSZ5247BT3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, SOD−123 terminal mapping, and direct alternatives for voltage regulation design-in.
Technical Context
The MMSZ5247BT3G operates as a silicon planar Zener diode with controlled avalanche breakdown at 17 V, specified under thermal equilibrium conditions (TL = 30°C ±1°C). Its 19 Ω Zener impedance at 7.4 mA ensures stable regulation under moderate load transients.
It features Class 3 ESD robustness (>16 kV HBM), Pb−Free construction, and UL 94 V−0 flammability rating. Thermal resistance is 340°C/W junction-to-ambient on FR−5 board, with 6.7 mW/°C derating above 75°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.15–17.85 V @ IZT = 7.4 mA - defines tight regulation window for 17 V reference designs |
| Power Dissipation | 500 mW on FR−5 board @ TL = 75°C - sets maximum continuous DC power handling |
| Zener Impedance | 19 Ω @ IZT = 7.4 mA - determines output voltage stability under current variation |
| Leakage Current | 0.1 μA @ VR = 13 V - ensures minimal error current in high-impedance bias networks |
| ESD Rating | Class 3 (>16 kV HBM) - supports robust handling in automated assembly and end-use environments |
| Junction Temp Range | −55°C to +150°C - enables operation in automotive under-hood and industrial control applications |
Pinout & Package
SOD−123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with cathode polarity band. Rated for 260°C soldering (10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener operation |
| 2 (Non-banded End) | Anode | Connected to circuit ground or lower potential; completes Zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables use in medium-current reference and clamp circuits without external heat sinking |
| ±5% Zener Tolerance | Reduces binning requirements while maintaining accuracy for non-critical voltage references |
| Low 19 Ω Dynamic Impedance | Minimizes output voltage deviation across 1–10 mA load current range |
| 16 kV HBM ESD Robustness | Eliminates need for external ESD protection in board-level handling and signal-path clamping |
| Pb−Free & RoHS Compliant | Meets global environmental compliance mandates without performance trade-offs |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Zener diode providing fixed 17 V reference to op-amp bias network. Use Value: Maintains <±0.5% reference drift over −40°C to +85°C due to low TC and thermal equilibrium specification. |
Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Shunt protection device diverting >10 A surge currents away from USB controller IC. Use Value: Limits peak clamped voltage to ≤19.5 V (VZ(max) + IPP×ZZT) during 8/20 μs surge per IEC 61000-4-5. |
| Automotive Body Control Module Reference | Medical Instrumentation Power Rail Clamp |
Use Scenario: Generating stable 17 V supply for CAN transceiver bias in 24 V vehicle systems. IC Role / Device Role / Timing Role: Zener regulator feeding LDO input to maintain clean 5 V logic rail. Use Value: AEC−Q101 qualification ensures reliability across 1000+ thermal cycles and 150°C junction operation. |
Use Scenario: Protecting isolated ADC front-end from ESD-induced latch-up in portable ECG monitors. IC Role / Device Role / Timing Role: Low-leakage (0.1 μA) shunt clamp on analog input rail. Use Value: Prevents measurement offset errors by limiting leakage contribution to <1 nA in 10 MΩ sensor interface. |
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, ±5%, SOT−23 package, 300 mW rating, 40 Ω ZZT | Lower power and higher impedance limit use to <5 mA loads; smaller footprint but less thermal margin | Select when board space is constrained and 16 V (not 17 V) regulation suffices with reduced current capability |
| SZMMSZ5247BT3G | Identical electrical specs, AEC−Q101 qualified with PPAP support; same SOD−123 package and marking | Designed specifically for automotive production with enhanced traceability and change control | Choose for automotive OEM programs requiring certified PPAP documentation and zero-defect manufacturing controls |
Compared with MMSZ5247BT3G, BZX84-C16LT1G offers smaller size but sacrifices 40% power rating and doubles Zener impedance, while SZMMSZ5247BT3G delivers identical regulation performance with full automotive qualification - making it the drop-in replacement for safety-critical deployments.
Availability
MMSZ5247BT3G is available at Aetrix Electronics and suitable for industrial sensor conditioning, USB port protection, automotive body control modules, and medical instrumentation requiring stable component supply and long-term lifecycle continuity.
Supply support for MMSZ5247BT3G 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 supplier of energy-efficient semiconductor solutions, serving automotive, industrial, cloud, and IoT markets with differentiated analog, power, and sensing technologies.
The MMSZ52xxxT1G series was developed for cost-sensitive, high-volume voltage reference and transient suppression applications where SOD−123 packaging, ±5% tolerance, and 500 mW dissipation meet mainstream industrial and consumer design requirements.
FAQ
What is the exact Zener voltage tolerance for MMSZ5247BT3G?
The MMSZ5247BT3G has a ±5% tolerance on its nominal 17 V Zener voltage, meaning the actual measured VZ falls between 16.15 V and 17.85 V when tested at IZT = 7.4 mA and thermal equilibrium (TL = 30°C ±1°C). This tolerance is confirmed in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table on page 3 of the official onsemi datasheet for MMSZ5247BT3G.
Can MMSZ5247BT3G replace MMSZ5246BT1G in an existing design?
Yes, MMSZ5247BT3G can replace MMSZ5246BT1G if the design accommodates the higher nominal Zener voltage (17 V vs. 16 V) and the tape-and-reel quantity (10,000 pcs vs. 3,000 pcs). Both share identical SOD−123 package, ±5% tolerance, and 500 mW rating, but MMSZ5247BT3G's VZ min/max (16.15–17.85 V) does not overlap MMSZ5246BT1G's (15.20–16.80 V), so functional verification at system level is required.
What is the maximum reverse leakage current for MMSZ5247BT3G?
The maximum reverse leakage current for MMSZ5247BT3G is 0.1 μA at VR = 13 V and TA = 25°C, as specified in the "5% TOLERANCE FG ELECTRICAL CHARACTERISTICS" table. This low leakage ensures minimal error in high-impedance voltage divider or bias networks where MMSZ5247BT3G is used as a reference element.
Is MMSZ5247BT3G suitable for automotive applications?
MMSZ5247BT3G itself is not AEC−Q101 qualified; however, its automotive-grade variant SZMMSZ5247BT3G - identical in all electrical and mechanical specifications - is fully AEC−Q101 qualified and PPAP capable. For automotive use, designers must specify SZMMSZ5247BT3G, not MMSZ5247BT3G, to meet qualification requirements.
How does thermal derating affect MMSZ5247BT3G's power handling above 75°C?
Above 75°C ambient temperature, MMSZ5247BT3G's power dissipation must be linearly derated at 6.7 mW/°C. For example, at 105°C ambient, maximum allowable power drops to 500 mW − (105 − 75) × 6.7 mW = 299 mW. This derating is defined in the "MAXIMUM RATINGS" table and assumes mounting on FR−5 board with minimum recommended footprint.
MMSZ5247BT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 17 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 19 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 13 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
MMSZ5247BT3G FAQ
1.How can I place an order for MMSZ5247BT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5247BT3G 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 MMSZ5247BT3G reliable?
The price and inventory of MMSZ5247BT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5247BT3G is usually 5 days.
3.What payment methods are accepted for MMSZ5247BT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5247BT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5247BT3G?
MMSZ5247BT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5247BT3G 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 MMSZ5247BT3G?
For technical support, including MMSZ5247BT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5247BT3G requirements.
6.How does Aetrix verify that MMSZ5247BT3G is sourced from the original manufacturer or authorized distributors?
All MMSZ5247BT3G 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 MMSZ5247BT3G meets industry standards.
7.What is the process for return or replacement of MMSZ5247BT3G?
All MMSZ5247BT3G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5247BT3G, 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 MMSZ5247BT3G part is unused and in its original packaging.
Return procedure for MMSZ5247BT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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