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onsemi SZMMBZ5236BLT1G
- Part No.:
- SZMMBZ5236BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5236BLT1G.pdf
- Description:
- DIODE ZENER 7.5V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,420
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Product details
Overview
SZMMBZ5236BLT1G from onsemi is a 7.5 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 6 Ω dynamic impedance at 20 mA test current and 3 μA leakage current at 6 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the SZMMBZ5236BLT1G 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 for high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage regulator using avalanche breakdown in silicon PN junction. Its nominal 7.5 V Zener voltage exhibits a positive temperature coefficient near zero crossing, minimizing drift across −55°C to +150°C ambient range.
The SOT-23 package features Pin 1 (Anode), Pin 2 (No Connection), and Pin 3 (Cathode), with cathode polarity indicated by a band. Thermal performance is specified for both FR-5 board (225 mW @ 25°C) and alumina substrate (300 mW @ 25°C), supporting flexible thermal design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.12–7.88 V @ 20 mA - defines stable regulation point with ±5% tolerance for supply rail clamping |
| Power Dissipation (PD) | 225 mW on FR-5 board - sets maximum continuous power handling without heatsink |
| Zener Impedance (ZZT) | 6 Ω @ 20 mA - ensures minimal output voltage variation under load transients |
| Leakage Current (IR) | 3 μA @ 6 V - guarantees low standby power loss in battery-powered circuits |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling during automated assembly and end-use in handheld devices |
| Junction Temperature | −65°C to +150°C - supports operation in automotive under-hood and industrial environments |
| AEC-Q101 Qualified | Yes - validates reliability for automotive electronics per stress-test requirements |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 × 1.30 × 1.00 mm body size, void-free thermosetting plastic case with corrosion-resistant finish. Cathode identified by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during regulation |
| 2 | No Connection | Internally unconnected; must remain floating on PCB |
| 3 | Cathode | Connected to higher-potential node; defines regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free/BFR-Free | RoHS-compliant construction enabling global market access and environmental compliance |
| Automated Assembly Optimized | SOT-23 footprint and marking design support high-yield pick-and-place and reflow processes |
| High-Density PCB Suitability | Small 2.90 × 1.30 mm outline allows placement in space-constrained mobile and wearables designs |
| Stable Low-Voltage Regulation | 7.5 V nominal Zener with tight 5% tolerance and low 6 Ω impedance ensures predictable clamping behavior |
Applications
| USB Port Protection | Smartphone Power Management |
|---|---|
Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector between VBUS and GND. Use Value: Limits voltage to ≤7.88 V, preventing damage to downstream USB controller ICs rated for 5.5 V max. |
Use Scenario: Providing stable reference for battery fuel gauge ADC inputs. IC Role / Device Role / Timing Role: Precision voltage reference source for analog front-end circuitry. Use Value: Delivers 7.5 V ±5% with <6 Ω impedance, reducing measurement error in battery state-of-charge calculation. |
| Automotive Body Control Module | IoT Sensor Node Power Rail |
Use Scenario: Regulating 7.5 V auxiliary supply for LIN transceiver biasing. IC Role / Device Role / Timing Role: Primary voltage regulator for isolated sub-circuit power domain. Use Value: AEC-Q101 qualification and −65°C to +150°C operation ensure reliability in under-dash environments. |
Use Scenario: Stabilizing 7.5 V supply to ultra-low-power MCU and sensor interface. IC Role / Device Role / Timing Role: Low-quiescent shunt regulator maintaining rail integrity during sleep/wake cycles. Use Value: 3 μA leakage at 6 V minimizes battery drain in multi-year deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C7V5LT1G | Same 7.5 V nominal, but 350 mW rating and 15 Ω ZZT; no AEC-Q101 qualification | Higher power handling, less precise regulation; suited for non-automotive consumer boards | Select when higher PD is needed and automotive qualification is unnecessary |
| SZBZX84C7V5LT1G | 7.5 V nominal, AEC-Q101 qualified, 350 mW rating, 15 Ω ZZT, SOT-23 package | Higher power and same automotive grade, but looser impedance spec impacts regulation accuracy | Choose for automotive use requiring >225 mW dissipation where 15 Ω ZZT is acceptable |
Compared with SZMMBZ5236BLT1G, BZX84-C7V5LT1G offers higher power but lacks automotive qualification and has higher impedance, while SZBZX84C7V5LT1G matches AEC-Q101 compliance but trades regulation precision for increased power capability-making SZMMBZ5236BLT1G optimal for space- and accuracy-constrained automotive and portable designs.
Availability
SZMMBZ5236BLT1G is available at Aetrix Electronics and suitable for automotive body control modules, smartphone power management subsystems, and IoT sensor node voltage regulation requiring stable component supply, RoHS compliance, and AEC-Q101 assurance.
Supply support for SZMMBZ5236BLT1G 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.
SZMMBZ5236BLT1G belongs to the SZMMBZ52xxBLT1G series of AEC-Q101-qualified Zener diodes designed specifically for automotive electronics and other high-reliability applications demanding enhanced process control and site-specific validation.
FAQ
What is the Zener voltage tolerance of SZMMBZ5236BLT1G?
The SZMMBZ5236BLT1G has a Zener voltage range of 7.12 V to 7.88 V at 20 mA test current, corresponding to a ±5% tolerance around the nominal 7.5 V value. This tolerance is guaranteed across operating temperatures and ensures consistent regulation performance in production designs using SZMMBZ5236BLT1G.
Is SZMMBZ5236BLT1G suitable for automotive applications?
Yes, SZMMBZ5236BLT1G is AEC-Q101 qualified and PPAP capable, with manufacturing controlled to meet automotive reliability standards. Its −65°C to +150°C junction temperature range, ESD robustness (>16 kV HBM), and Pb-free/halogen-free construction make it appropriate for under-hood and cabin electronics where SZMMBZ5236BLT1G is deployed as a voltage reference or clamp.
What is the thermal resistance of SZMMBZ5236BLT1G on standard PCB?
SZMMBZ5236BLT1G has a junction-to-ambient thermal resistance (RJA) of 556 °C/W when mounted on an FR-5 board. This value determines the temperature rise above ambient per milliwatt of power dissipated and is critical for thermal design when operating SZMMBZ5236BLT1G near its 225 mW rating.
Does SZMMBZ5236BLT1G have a no-connect pin, and how should it be handled?
Yes, SZMMBZ5236BLT1G uses the SOT-23 Style 8 pinout: Pin 1 is Anode, Pin 2 is No Connection (NC), and Pin 3 is Cathode. Pin 2 must remain unconnected on the PCB layout-no trace, pad, or via should be attached to it, as internal connection is absent and routing to it may compromise reliability of SZMMBZ5236BLT1G.
How does the ESD rating of SZMMBZ5236BLT1G impact system-level design?
SZMMBZ5236BLT1G carries Class 3 Human Body Model ESD rating (>16 kV), meaning it can withstand electrostatic discharges common during handling and assembly without degradation. This reduces need for external ESD protection in front-end circuits and simplifies layout where SZMMBZ5236BLT1G is used for I/O line clamping or supply rail stabilization.
SZMMBZ5236BLT1G 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):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 6 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 6 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)
SZMMBZ5236BLT1G FAQ
1.How can I place an order for SZMMBZ5236BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5236BLT1G 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 SZMMBZ5236BLT1G reliable?
The price and inventory of SZMMBZ5236BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5236BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5236BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5236BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5236BLT1G?
SZMMBZ5236BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5236BLT1G 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 SZMMBZ5236BLT1G?
For technical support, including SZMMBZ5236BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5236BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5236BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5236BLT1G 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 SZMMBZ5236BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5236BLT1G?
All SZMMBZ5236BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5236BLT1G, 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 SZMMBZ5236BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5236BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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