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onsemi MMBZ5247BLT3G
- Part No.:
- MMBZ5247BLT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5247BLT3G.pdf
- Description:
- DIODE ZENER 17V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,925
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Product details
Overview
MMBZ5247BLT3G from onsemi is a 225 mW surface-mount Zener diode in SOT-23 package, rated for 17 V nominal Zener voltage at 7.4 mA test current, with 600 Ω dynamic impedance and 0.1 μA leakage current at 13 V reverse bias. It provides precision voltage regulation in space-constrained applications including portable power rails and voltage reference circuits.
For engineers reviewing the MMBZ5247BLT3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W on FR-5), ESD rating (>16 kV HBM), and Pb-free RoHS-compliant packaging for high-density PCB assembly.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, featuring a fixed breakdown voltage defined at IZT = 7.4 mA. Its Zener impedance remains stable at ≤600 Ω under specified test conditions, and it maintains low leakage (≤0.1 μA) up to 13 V reverse bias.
The MMBZ5247BLT3G is optimized for automated SMT placement in the SOT-23 (TO-236) package, with void-free thermosetting plastic case, UL 94 V-0 flammability rating, and 260°C/10s soldering tolerance. It supports operation across −65°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17 V nominal, 16.15–17.85 V min–max range at IZT = 7.4 mA - defines stable regulation point for reference design |
| Power Dissipation (PD) | 225 mW on FR-5 board at 25°C - sets maximum continuous DC power handling without derating |
| Zener Impedance (ZZT) | ≤600 Ω at IZT = 7.4 mA - determines AC voltage stability under varying load current |
| Leakage Current (IR) | ≤0.1 μA at VR = 13 V - ensures minimal parasitic current in standby or high-impedance bias networks |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - enables robust handling in manual assembly and field-replaceable modules |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive under-hood and industrial ambient environments |
| Package | SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm - enables high-density routing and compatibility with standard pick-and-place equipment |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package with cathode indicated by polarity band; void-free thermosetting case, corrosion-resistant finish, UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | DC current entry terminal during forward conduction; connected to lower-potential node in Zener regulation configuration |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or via should attach to this pad |
| 3 | Cathode | DC current exit terminal during reverse breakdown; tied to regulated output node and voltage reference ground return |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating | Enables stable regulation in low-power sensor interfaces and microcontroller reset circuits without heatsinking |
| ESD Robustness >16 kV HBM | Reduces need for external ESD protection in handheld and wearable electronics designs |
| Pb-Free / RoHS Compliant | Meets global environmental compliance requirements for consumer, industrial, and medical end equipment |
| Small SOT-23 Footprint | Supports ≥2× higher component density vs. DO-35 or SOD-123 packages in compact battery-powered PCBs |
| Wide Operating Temperature | Validated performance from −65°C to +150°C eliminates derating concerns in extended-temperature applications |
Applications
| Microcontroller Reset Circuit | Portable Device Battery Monitor |
|---|---|
Use Scenario: Generating a precise 17 V threshold for brown-out detection in an ARM Cortex-M4-based IoT node. IC Role / Device Role / Timing Role: Zener diode acting as voltage reference input to comparator circuit triggering MCU reset when supply drops below regulation threshold. Use Value: Tight ±5% VZ tolerance ensures consistent reset voltage across production units without trimming. |
Use Scenario: Monitoring Li-ion battery pack voltage in a Bluetooth headset to prevent over-discharge. IC Role / Device Role / Timing Role: Provides stable 17 V reference for ADC input scaling in analog front-end of fuel gauge IC. Use Value: Low 0.1 μA leakage avoids measurable self-discharge during multi-week standby mode. |
| USB-C Power Negotiation Reference | Industrial Sensor Signal Conditioning |
Use Scenario: Supplying reference voltage to USB PD controller's VBUS monitoring path in a dual-role port design. IC Role / Device Role / Timing Role: Zener diode establishes known clamp level for overvoltage protection and feedback divider calibration. Use Value: 600 Ω ZZT ensures minimal voltage shift under transient load changes during PD contract negotiation. |
Use Scenario: Biasing a 4–20 mA current loop transmitter in a factory automation pressure sensor module. IC Role / Device Role / Timing Role: Regulates excitation voltage for bridge sensor and op-amp reference rail in isolated analog signal chain. Use Value: −65°C to +150°C operating range guarantees functionality in unheated outdoor 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 |
|---|---|---|---|
| MMBZ5247BLT1G | Same electrical specs, but supplied in 3,000-piece tape-and-reel vs. 10,000-piece for MMBZ5247BLT3G | Preferred for prototyping or low-volume production where smaller reels reduce inventory overhead | Select MMBZ5247BLT1G when reel size constraints or initial sampling volume dictate smaller packaging |
| BZX84-C16LT1G | 16 V nominal Zener voltage, 350 mW rating, same SOT-23 package, but higher leakage (≤100 nA @ 12.8 V) | Used where slightly lower regulation voltage and higher power margin are acceptable trade-offs | Choose BZX84-C16LT1G only if system-level tolerance allows 1 V lower reference and requires higher dissipation headroom |
Compared with MMBZ5247BLT3G, MMBZ5247BLT1G offers identical regulation performance with reduced reel quantity, while BZX84-C16LT1G trades 1 V lower Zener voltage and higher leakage for increased power margin - neither is pin-compatible drop-in replacement due to voltage mismatch and differing thermal derating curves.
Availability
MMBZ5247BLT3G is available at Aetrix Electronics and suitable for portable electronics, industrial sensor nodes, and USB-C power interface designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MMBZ5247BLT3G 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 MMBZ52xxBLT3G series belongs to onsemi's precision Zener regulator product line, engineered specifically for space-constrained, high-reliability voltage reference and overvoltage protection functions in portable and embedded systems.
FAQ
What is the nominal Zener voltage of the MMBZ5247BLT3G?
The MMBZ5247BLT3G has a nominal Zener voltage of 17 V, with a guaranteed range of 16.15 V to 17.85 V at a test current of 7.4 mA. This value is measured under standard conditions (TA = 25°C) using pulsed current to avoid self-heating effects. The MMBZ5247BLT3G achieves this specification consistently across its qualified production lots and meets AEC-Q101 stress testing for reliability-critical applications.
Is the MMBZ5247BLT3G RoHS compliant and lead-free?
Yes, the MMBZ5247BLT3G is fully RoHS compliant and lead-free, as confirmed by onsemi's official documentation and material declarations. The "G" suffix in the part number explicitly denotes Pb-free packaging, and the device uses halogen-free/BFR-free molding compound meeting EU Directive 2011/65/EU. The MMBZ5247BLT3G also carries UL 94 V-0 flammability certification for safety-critical PCB layouts.
What is the pin configuration of the MMBZ5247BLT3G?
The MMBZ5247BLT3G uses the SOT-23 package with Style 8 pinout: Pin 1 is Anode, Pin 2 is No Connection (NC), and Pin 3 is Cathode - clearly marked by a polarity band on the package body. This configuration is verified in the official onsemi datasheet (Rev. 16, July 2024) and matches mechanical outline CASE 318. The MMBZ5247BLT3G must be placed with Pin 2 left unconnected on the PCB to ensure proper function and reliability.
What is the maximum power dissipation of the MMBZ5247BLT3G on a standard PCB?
The MMBZ5247BLT3G is rated for 225 mW total power dissipation on FR-5 board at 25°C ambient, derating linearly at 1.8 mW/°C above that temperature. This rating assumes standard JEDEC-defined copper area and is validated per onsemi's thermal characterization. The MMBZ5247BLT3G achieves a junction-to-ambient thermal resistance of 556 °C/W under these conditions, making it suitable for low-duty-cycle or intermittent regulation tasks without additional heatsinking.
Does the MMBZ5247BLT3G have automotive qualification?
No, the MMBZ5247BLT3G itself is not AEC-Q101 qualified; however, its automotive-grade counterpart SZMMBZ5247BLT3G is explicitly certified and PPAP-capable. The MMBZ5247BLT3G shares identical electrical and mechanical specifications but lacks the controlled manufacturing site and change management required for automotive use. For automotive applications, designers must specify the SZ-prefix variant - the MMBZ5247BLT3G is intended for industrial, computing, and consumer systems.
MMBZ5247BLT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 17 V
- Tolerance:
- ±5%
- Power - Max:
- 225 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ5247BLT3G FAQ
1.How can I place an order for MMBZ5247BLT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5247BLT3G 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 MMBZ5247BLT3G reliable?
The price and inventory of MMBZ5247BLT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5247BLT3G is usually 5 days.
3.What payment methods are accepted for MMBZ5247BLT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5247BLT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5247BLT3G?
MMBZ5247BLT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5247BLT3G 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 MMBZ5247BLT3G?
For technical support, including MMBZ5247BLT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5247BLT3G requirements.
6.How does Aetrix verify that MMBZ5247BLT3G is sourced from the original manufacturer or authorized distributors?
All MMBZ5247BLT3G 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 MMBZ5247BLT3G meets industry standards.
7.What is the process for return or replacement of MMBZ5247BLT3G?
All MMBZ5247BLT3G units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5247BLT3G, 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 MMBZ5247BLT3G part is unused and in its original packaging.
Return procedure for MMBZ5247BLT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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