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onsemi SZMMBZ5247BLT1G
- Part No.:
- SZMMBZ5247BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5247BLT1G.pdf
- Description:
- DIODE ZENER 17V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:24,000
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Product details
Overview
SZMMBZ5247BLT1G from onsemi is a 17 V, 225 mW Zener diode in SOT-23 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers 7.4 mA test current, 19 Ω dynamic impedance at IZT, and 0.1 µA leakage at 13 V reverse bias. Used in power supply feedback loops, voltage reference rails, and ESD-sensitive portable electronics.
For engineers reviewing the SZMMBZ5247BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W on FR-5), AEC-Q101 qualification, and Pb-free RoHS compliance for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference with cathode-anode polarity and no internal connection on pin 2. Its Zener breakdown is optimized for stable regulation at 25°C ambient with ±0.08%/°C temperature coefficient near 17 V nominal.
The SOT-23 package enables automated placement while maintaining 16 kV HBM ESD robustness. Thermal derating follows 1.8 mW/°C above 25°C on FR-5 board, supporting operation from −65°C to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.15 V (min) to 17.85 V (max) at 7.4 mA - defines regulated output range under standard test conditions |
| Power Dissipation | 225 mW on FR-5 board - sets maximum continuous power handling before thermal shutdown risk |
| Zener Impedance (ZZT) | 19 Ω at 7.4 mA - determines regulation accuracy under load transients |
| Leakage Current (IR) | 0.1 µA at 13 V reverse bias - ensures minimal standby power loss in high-impedance bias networks |
| ESD Rating | Class 3 (>16 kV HBM) - protects against electrostatic discharge during handling and PCB assembly |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive under-hood and industrial control environments |
| AEC-Q101 Qualified | Yes - meets stress testing requirements for automotive electronic components |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 mm × 1.30 mm × 1.00 mm body size, void-free thermosetting plastic case with corrosion-resistant finish. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-biased configuration; carries forward current when used as rectifier |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential node in Zener mode; provides regulated voltage reference point |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified and PPAP capable - enables direct use in Tier-1 automotive subsystems without requalification |
| Pb-free & RoHS compliance | Fully compliant with EU RoHS Directive 2011/65/EU and halogen-free/BFR-free - satisfies global environmental compliance mandates |
| High-density packaging | SOT-23 footprint saves >60% board area vs. DO-35 - critical for smartphones, wearables, and miniaturized IoT sensors |
| ESD robustness | 16 kV HBM rating - eliminates need for external ESD protection in low-energy signal paths |
| Thermal performance | 556 °C/W RJA on FR-5 - allows reliable 225 mW operation with minimal heatsinking in compact layouts |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for microcontroller ADC inputs in door module ECUs exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 17 V rail for analog front-end biasing. Use Value: Maintains <±1% reference stability across −40°C to +125°C due to AEC-Q101 validation and low TC near 17 V. |
Use Scenario: Clamping transient overvoltage on 4–20 mA current loop transmitters in factory automation systems. IC Role / Device Role / Timing Role: Overvoltage protection element shunting surge energy away from precision op-amps. Use Value: 19 Ω ZZT ensures rapid clamping response with <50 ns turn-on delay under 1 kV EFT pulses. |
| Portable Medical Pulse Oximeter | 5G Small Cell RF Front-End Biasing |
Use Scenario: Generating stable bias for red/IR LED drivers in battery-powered wearable health monitors. IC Role / Device Role / Timing Role: Low-noise voltage reference enabling consistent LED current control. Use Value: 0.1 µA leakage at 13 V minimizes quiescent current drain, extending single-charge battery life by >12 hours. |
Use Scenario: Providing regulated gate bias for GaN FETs in millimeter-wave power amplifiers. IC Role / Device Role / Timing Role: Precision DC bias source stabilizing amplifier operating point under thermal drift. Use Value: 7.4 mA IZT and tight 16.15–17.85 V tolerance ensure repeatable gain flatness across 24–30 GHz bands. |
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 Zener voltage range (16.15–17.85 V), identical SOT-23 package, but not AEC-Q101 qualified | Lacks automotive qualification and PPAP support - suitable only for commercial-grade consumer or industrial designs | Select when automotive compliance is unnecessary and cost sensitivity outweighs qualification requirements |
| SZMMBZ5247BLT3G | Identical electrical specs and AEC-Q101 qualification, but supplied in 10,000-unit tape-and-reel versus 3,000-unit for SZMMBZ5247BLT1G | Optimized for high-volume automated assembly lines requiring longer reel lengths and reduced changeover frequency | Select for production runs exceeding 50k units/year where reel logistics impact line uptime |
Compared with MMBZ5247BLT1G, SZMMBZ5247BLT1G adds automotive qualification without sacrificing regulation accuracy or thermal performance; compared with SZMMBZ5247BLT3G, it offers identical functionality in smaller reels for prototyping and low-volume manufacturing.
Availability
SZMMBZ5247BLT1G is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, portable medical devices, and 5G small cell RF front-end biasing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SZMMBZ5247BLT1G 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 silicon solutions for automotive, industrial, cloud, medical, and edge applications.
SZMMBZ5247BLT1G belongs to the SZMMBZ52xxBLT1G series - engineered specifically for automotive and high-reliability applications requiring AEC-Q101 qualification, enhanced process controls, and site-specific change management.
FAQ
What is the Zener voltage tolerance of SZMMBZ5247BLT1G?
The SZMMBZ5247BLT1G has a Zener voltage range of 16.15 V (minimum) to 17.85 V (maximum) at 7.4 mA test current, representing a ±5% tolerance around the nominal 17 V rating. This tolerance is guaranteed across the full operating temperature range and is verified per AEC-Q101 stress testing protocols for automotive-grade reliability.
Is SZMMBZ5247BLT1G compatible with lead-free reflow soldering processes?
Yes, SZMMBZ5247BLT1G supports lead-free reflow soldering with a maximum case temperature of 260°C for 10 seconds, fully compliant with IPC/JEDEC J-STD-020 moisture sensitivity level 1 requirements. Its Pb-free, halogen-free/BFR-free construction meets RoHS Directive 2011/65/EU and is validated for standard SAC305 alloy profiles.
How does the no-connect pin (pin 2) affect PCB layout for SZMMBZ5247BLT1G?
Pin 2 of SZMMBZ5247BLT1G is internally unconnected and must remain electrically floating on the PCB. No copper trace, pad, or via should be routed to this terminal. Maintaining pin 2 as an open circuit prevents unintended parasitic coupling and ensures specified Zener impedance (19 Ω) and leakage current (0.1 µA) performance.
What is the thermal resistance of SZMMBZ5247BLT1G on standard FR-5 PCB?
SZMMBZ5247BLT1G has a junction-to-ambient thermal resistance (RJA) of 556 °C/W when mounted on FR-5 board per datasheet Note 1. This value assumes standard 1.0 × 0.75 × 0.62 inch test board dimensions and defines the maximum allowable power dissipation (225 mW at 25°C) before thermal derating begins at 1.8 mW/°C.
Does SZMMBZ5247BLT1G support bidirectional ESD protection?
No, SZMMBZ5247BLT1G is a unidirectional Zener diode configured for reverse-bias voltage regulation only. Its ESD rating of >16 kV HBM applies solely to the cathode-to-anode path in reverse breakdown mode. For bidirectional protection, a paired device or dedicated TVS array must be used alongside SZMMBZ5247BLT1G.
SZMMBZ5247BLT1G 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):
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZMMBZ5247BLT1G FAQ
1.How can I place an order for SZMMBZ5247BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5247BLT1G 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 SZMMBZ5247BLT1G reliable?
The price and inventory of SZMMBZ5247BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5247BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5247BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5247BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5247BLT1G?
SZMMBZ5247BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5247BLT1G 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 SZMMBZ5247BLT1G?
For technical support, including SZMMBZ5247BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5247BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5247BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5247BLT1G 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 SZMMBZ5247BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5247BLT1G?
All SZMMBZ5247BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5247BLT1G, 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 SZMMBZ5247BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5247BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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