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onsemi SZMMBZ5244BLT1G
- Part No.:
- SZMMBZ5244BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5244BLT1G.pdf
- Description:
- DIODE ZENER 14V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,740
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Product details
Overview
SZMMBZ5244BLT1G from onsemi is a 14 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 600 Ω dynamic impedance at 9 mA test current and 0.1 μA leakage at 10 V reverse bias - used for precision voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the SZMMBZ5244BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal resistance (556 °C/W), ESD rating (>16 kV HBM), AEC-Q101 qualification, and SOT-23 footprint compatibility in space-constrained designs.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for stable reverse-bias regulation under low-current conditions (IZT = 9 mA). Its temperature coefficient is near zero at ~14 V, minimizing drift across −55°C to +150°C operating range.
The SOT-23 package supports automated placement and reflow soldering at 260°C for 10 seconds. Pin 2 is internally unconnected - confirmed by mechanical outline Style 8 and electrical characteristics table - ensuring no parasitic coupling or unintended conduction paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13.3 V min / 14.0 V nom / 14.7 V max @ IZT = 9 mA - defines regulated output voltage window for reference or clamping |
| Power Dissipation (PD) | 225 mW on FR-5 board @ 25°C - sets maximum continuous power handling before thermal derating begins |
| Zener Impedance (ZZT) | 600 Ω max @ IZT = 9 mA - determines regulation stiffness and AC ripple rejection capability |
| Leakage Current (IR) | 0.1 μA max @ VR = 10 V - ensures minimal standby current draw in battery-powered systems |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - enables robust handling during assembly without external protection |
| Thermal Resistance (RJA) | 556 °C/W on FR-5 board - quantifies junction-to-ambient thermal path efficiency for reliability modeling |
| AEC-Q101 Qualified | Yes - confirms automotive-grade stress testing compliance for under-hood and infotainment applications |
Pinout & Package
SOT-23 (TO-236) package: 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm lead pitch, void-free thermosetting plastic case with corrosion-resistant finish. Cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry / reverse bias cathode reference node in clamping configuration |
| 2 | No Connection | Internally isolated - must remain unconnected on PCB to avoid malfunction or parametric shift |
| 3 | Cathode | Regulated output node in Zener mode; ties to system ground or reference plane in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free/BFR-Free | RoHS-compliant construction enabling global market access and simplified end-of-life processing |
| Automated Assembly Optimized | Standard SOT-23 footprint and marking support high-speed pick-and-place and AOI inspection |
| High-Density Packaging | Small 2.9 mm × 1.3 mm footprint reduces PCB area vs. DO-35 or SOD-123 alternatives |
| Wide Operating Temperature | −65°C to +150°C junction range supports industrial and automotive under-hood environments |
| Stable Low-Current Regulation | Validated performance at IZT = 9 mA enables use in ultra-low-power sensor biasing and wake-up circuits |
Applications
| Portable Power Rail Protection | Automotive Sensor Reference |
|---|---|
Use Scenario: Clamping transient spikes on 12 V supply lines in Bluetooth headsets and smart wearables. IC Role / Device Role / Timing Role: Shunt Zener regulator providing overvoltage protection and stable 14 V reference for LDO input staging. Use Value: Prevents damage to downstream PMICs during load-dump events while consuming <0.1 μA in standby. |
Use Scenario: Providing stable bias voltage for MEMS pressure sensors in engine control modules. IC Role / Device Role / Timing Role: Precision voltage reference source with <±5% tolerance and AEC-Q101 qualification. Use Value: Ensures sensor accuracy across −40°C to +125°C ambient without requiring active regulation circuitry. |
| Industrial IoT Node Voltage Reference | USB-C PD Adapter Feedback Network |
Use Scenario: Generating accurate 14 V reference for ADC input scaling in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Passive Zener reference replacing higher-cost IC references where 1% absolute accuracy is not required. Use Value: Delivers 14 V ±0.7 V regulation with 600 Ω dynamic impedance, reducing BOM cost versus TL431-based solutions. |
Use Scenario: Setting feedback threshold in secondary-side regulation of 20 W USB-C chargers. IC Role / Device Role / Timing Role: Zener element in optocoupler feedback divider network for isolated output voltage sensing. Use Value: Enables compact, low-component-count feedback design compatible with SOT-23 layout constraints. |
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-C15LT1G | 15 V nominal Zener voltage (±6%), 350 mW rating, same SOT-23 package but non-automotive grade | Lacks AEC-Q101 qualification and Class 3 ESD rating; suitable for commercial portable electronics only | Select when automotive qualification is unnecessary and 15 V regulation suffices with higher power margin |
| SZMMBZ5245BLT1G | 15 V nominal Zener voltage (14.25–15.75 V), identical AEC-Q101 qualification, same SOT-23 package and thermal specs | Higher nominal voltage shifts regulation point - requires redesign of feedback or clamp thresholds | Choose for systems needing tighter 15 V reference with identical automotive reliability and footprint |
Compared with SZMMBZ5244BLT1G, BZX84-C15LT1G offers higher power but no automotive qualification, while SZMMBZ5245BLT1G provides a 1 V higher Zener voltage with full drop-in compatibility in AEC-Q101 designs - both require validation of voltage tolerance impact on system margin.
Availability
SZMMBZ5244BLT1G is available at Aetrix Electronics and suitable for automotive sensor modules, portable medical devices, and industrial IoT edge nodes requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SZMMBZ5244BLT1G 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 IoT applications.
SZMMBZ52xxBLT1G series targets automotive and high-reliability portable electronics, delivering AEC-Q101-qualified Zener regulation in miniature SOT-23 packages for space- and safety-critical voltage reference needs.
FAQ
What is the Zener voltage tolerance of SZMMBZ5244BLT1G?
The SZMMBZ5244BLT1G has a Zener voltage range of 13.3 V (minimum) to 14.7 V (maximum) at 9 mA test current, corresponding to ±5% tolerance around the nominal 14.0 V value. This tolerance is fully specified in the Electrical Characteristics table and applies under standard test conditions at 25°C ambient temperature. The SZMMBZ5244BLT1G maintains this specification across its qualified operating temperature range.
Is SZMMBZ5244BLT1G pin-compatible with MMBZ5244BLT1G?
Yes, SZMMBZ5244BLT1G shares identical pinout (Anode-Pin1, NC-Pin2, Cathode-Pin3), package dimensions, and electrical specifications with MMBZ5244BLT1G - the "SZ" prefix denotes automotive qualification (AEC-Q101) and PPAP-capable manufacturing, while all other form-fit-function parameters match. The SZMMBZ5244BLT1G can replace MMBZ5244BLT1G in automotive designs without layout changes.
What is the maximum reverse leakage current for SZMMBZ5244BLT1G?
The maximum reverse leakage current for SZMMBZ5244BLT1G is 0.1 μA at 10 V reverse bias (VR), as specified in the Electrical Characteristics table. This low leakage supports ultra-low-power operation in battery-backed systems and ensures minimal quiescent current in always-on monitoring circuits using the SZMMBZ5244BLT1G.
Does SZMMBZ5244BLT1G require external current limiting in shunt regulator applications?
Yes, SZMMBZ5244BLT1G requires an external series resistor to limit current to ≤9 mA under worst-case input voltage conditions - consistent with its IZT test condition. Without proper current limiting, excessive power dissipation beyond 225 mW may cause thermal runaway or parametric shift. Designers must calculate resistor value based on input voltage range and load current when implementing the SZMMBZ5244BLT1G in shunt regulation.
What packaging options are available for SZMMBZ5244BLT1G?
SZMMBZ5244BLT1G is supplied in Pb-free SOT-23 tape-and-reel packaging: 3,000 units per reel (order code ending in "T1G"). It is not offered in cut-tape or tray formats per the official onsemi ordering information. The tape-and-reel format supports automated surface-mount assembly and is compatible with standard SMT feeders used for the SZMMBZ5244BLT1G.
SZMMBZ5244BLT1G 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):
- 14 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 10 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)
SZMMBZ5244BLT1G FAQ
1.How can I place an order for SZMMBZ5244BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5244BLT1G 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 SZMMBZ5244BLT1G reliable?
The price and inventory of SZMMBZ5244BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5244BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5244BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5244BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5244BLT1G?
SZMMBZ5244BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5244BLT1G 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 SZMMBZ5244BLT1G?
For technical support, including SZMMBZ5244BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5244BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5244BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5244BLT1G 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 SZMMBZ5244BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5244BLT1G?
All SZMMBZ5244BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5244BLT1G, 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 SZMMBZ5244BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5244BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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