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onsemi SZMMBZ5245BLT3G
- Part No.:
- SZMMBZ5245BLT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5245BLT3G.pdf
- Description:
- DIODE ZENER 15V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
SZMMBZ5245BLT3G from onsemi is a 15 V, 225 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers ±5% Zener voltage tolerance at 8.5 mA test current, exhibits 600 Ω dynamic impedance at IZT, and supports operation from −65°C to +150°C. It is used in power supply feedback loops, voltage reference circuits, and ESD-sensitive portable electronics.
For engineers reviewing the SZMMBZ5245BLT3G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (15 V), power rating (225 mW on FR-5 board), thermal resistance (556 °C/W), leakage current (0.1 µA at 11 V), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference with cathode-anode polarity, where reverse-biased conduction initiates at the specified Zener breakdown voltage. Its 225 mW power dissipation rating is defined on FR-5 PCB material at 25°C ambient, derating linearly at 1.8 mW/°C above that temperature.
The SOT-23 package features three terminals: Pin 1 (Anode), Pin 2 (No Connection), Pin 3 (Cathode), with cathode identified by a polarity band. It achieves Class 3 ESD robustness (>16 kV HBM) and complies with AEC-Q101 for automotive applications, distinguishing it from standard MMBZ5245BLT1G variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.25–15.75 V at 8.5 mA - defines stable regulation point for feedback or clamping circuits |
| Power Dissipation (PD) | 225 mW on FR-5 board @ 25°C - sets maximum continuous power handling without heatsinking |
| Zener Impedance (ZZT) | 600 Ω @ IZT = 8.5 mA - determines output voltage stability under load variation |
| Leakage Current (IR) | 0.1 µA @ VR = 11 V - ensures minimal parasitic current in standby or high-impedance nodes |
| Operating Temperature | −65°C to +150°C - enables use in under-hood automotive or industrial environments |
| ESD Rating | Class 3 (>16 kV HBM) - provides robustness against handling and system-level electrostatic discharge |
| AEC-Q101 Qualified | Yes - confirms stress-tested reliability for automotive electronic control units and infotainment systems |
Pinout & Package
SOT-23 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body size, void-free thermosetting plastic case, corrosion-resistant finish, UL 94 V-0 flammability rating, and 260°C max soldering temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node in reverse-bias configuration; required for proper Zener conduction path |
| Pin 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or pad should tie to this terminal |
| Pin 3 | Cathode | Marked with polarity band; connects to higher-potential node; carries regulated output or clamp current |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free/BFR-Free | RoHS-compliant construction enabling use in environmentally regulated consumer and automotive products |
| Automotive Qualification | SZ-prefix denotes AEC-Q101 qualification and PPAP capability-required for Tier 1 automotive BOMs |
| High-Density Packaging | SOT-23 footprint minimizes PCB area vs. DO-35 or SOD-123, supporting >10k units per square inch layouts |
| ESD Robustness | Class 3 HBM (>16 kV) eliminates need for external ESD protection in handheld and wearable designs |
| Thermal Performance | 556 °C/W junction-to-ambient resistance on FR-5 allows predictable thermal rise in compact power rails |
Applications
| Automotive Body Control Module | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Regulating 12 V supply rail in BCM microcontroller power domain under load dump transients. IC Role / Device Role / Timing Role: Zener voltage clamp protecting LDO input and MCU VDD pins from >20 V surges. Use Value: Withstands −65°C to +150°C ambient and maintains <0.1 µA leakage at 11 V, ensuring low quiescent current in sleep mode. |
Use Scenario: Clamping CC line voltage during USB-C negotiation to prevent controller damage from VCONN coupling. IC Role / Device Role / Timing Role: Fast-acting shunt regulator limiting CC pin voltage to ≤15.75 V during fault conditions. Use Value: 600 Ω ZZT ensures minimal voltage deviation during 10–20 mA transient currents, preserving PD communication integrity. |
| Industrial Sensor Signal Conditioning | Portable Medical Pulse Oximeter |
Use Scenario: Providing stable 15 V reference for op-amp biasing in analog front-end of pressure sensor interface. IC Role / Device Role / Timing Role: Precision voltage reference source with ±5% tolerance across temperature, replacing bulkier TL431 solutions. Use Value: 225 mW rating enables direct mounting near signal chain without thermal isolation, reducing layout complexity. |
Use Scenario: Protecting ADC input and LED driver circuitry from ESD events during patient cable insertion/removal. IC Role / Device Role / Timing Role: Dual-role component: ESD clamp (via 16 kV HBM rating) and overvoltage limiter (15 V Zener threshold). Use Value: Eliminates need for separate TVS and reference diodes-reducing BOM count and PCB area in Class II medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5245BLT1G | Same Zener voltage (14.25–15.75 V), but not AEC-Q101 qualified; 3,000/reel packaging only | Lacks automotive qualification and PPAP support; unsuitable for OEM vehicle programs | Select when cost sensitivity outweighs automotive compliance requirements |
| SZMMBZ5245BLT1G | Identical electrical specs and AEC-Q101 qualification, but supplied in 3,000-unit tape-and-reel vs. 10,000-unit for SZMMBZ5245BLT3G | Same functional performance; differs only in packaging quantity and reel orientation | Choose for prototyping or low-volume production where smaller reels reduce inventory overhead |
Compared with MMBZ5245BLT1G, SZMMBZ5245BLT3G adds mandatory automotive qualification and larger reel packaging; compared with SZMMBZ5245BLT1G, it offers identical performance with optimized logistics for high-volume manufacturing runs.
Availability
SZMMBZ5245BLT3G is available at Aetrix Electronics and suitable for automotive body control modules, USB-C power delivery systems, industrial sensor interfaces, and portable medical devices requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 compliance.
Supply support for SZMMBZ5245BLT3G 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 MMBZ52xxBLT1G/SZMMBZ52xxBLT1G series was developed to provide miniature, high-reliability Zener regulation for space- and power-constrained portable and automotive electronics.
FAQ
What is the Zener voltage tolerance of SZMMBZ5245BLT3G?
The SZMMBZ5245BLT3G has a Zener voltage range of 14.25 V to 15.75 V at 8.5 mA test current, corresponding to ±5% tolerance around the nominal 15 V value. This tolerance is guaranteed across the full operating temperature range of −65°C to +150°C and is verified per onsemi's AEC-Q101 stress testing protocol for SZMMBZ5245BLT3G.
Is SZMMBZ5245BLT3G pin-compatible with MMBZ5245BLT1G?
Yes, SZMMBZ5245BLT3G shares identical SOT-23 pinout (Pin 1: Anode, Pin 2: NC, Pin 3: Cathode) and mechanical dimensions with MMBZ5245BLT1G. However, SZMMBZ5245BLT3G includes additional automotive qualification (AEC-Q101) and is supplied in 10,000-unit tape-and-reel format-making it a drop-in replacement only where automotive compliance is required.
What is the maximum reverse leakage current for SZMMBZ5245BLT3G?
The maximum reverse leakage current for SZMMBZ5245BLT3G is 0.1 µA at VR = 11 V and TA = 25°C. This low leakage ensures minimal power loss in high-impedance reference or standby circuits, especially critical in battery-powered portable medical and automotive applications using SZMMBZ5245BLT3G.
Does SZMMBZ5245BLT3G require a heatsink in typical applications?
No, SZMMBZ5245BLT3G does not require an external heatsink in standard applications. Its 225 mW power rating on FR-5 board and 556 °C/W thermal resistance allow safe operation up to ~85°C ambient when dissipating full rated power-sufficient for most voltage reference and clamp functions in SZMMBZ5245BLT3G-based designs.
How does the ESD rating of SZMMBZ5245BLT3G benefit system design?
SZMMBZ5245BLT3G features Class 3 Human Body Model ESD rating (>16 kV), enabling direct placement on exposed I/O lines (e.g., USB-C CC pins or sensor inputs) without supplemental TVS diodes. This simplifies layout, reduces component count, and improves reliability in handheld and wearable systems using SZMMBZ5245BLT3G for integrated clamping and regulation.
SZMMBZ5245BLT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 16 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 11 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZMMBZ5245BLT3G FAQ
1.How can I place an order for SZMMBZ5245BLT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5245BLT3G 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 SZMMBZ5245BLT3G reliable?
The price and inventory of SZMMBZ5245BLT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5245BLT3G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5245BLT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5245BLT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5245BLT3G?
SZMMBZ5245BLT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5245BLT3G 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 SZMMBZ5245BLT3G?
For technical support, including SZMMBZ5245BLT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5245BLT3G requirements.
6.How does Aetrix verify that SZMMBZ5245BLT3G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5245BLT3G 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 SZMMBZ5245BLT3G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5245BLT3G?
All SZMMBZ5245BLT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5245BLT3G, 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 SZMMBZ5245BLT3G part is unused and in its original packaging.
Return procedure for SZMMBZ5245BLT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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