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onsemi SZMMBZ5240ELT1G
- Part No.:
- SZMMBZ5240ELT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5240ELT1G.pdf
- Description:
- DIODE ZENER 10V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,995
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Product details
Overview
SZMMBZ5240ELT1G from onsemi is a 10 V, 225 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and transient suppression in space-constrained circuits. It delivers 10.0 V nominal Zener voltage at 20 mA test current, with ±5% tolerance (9.5–10.5 V), 17 Ω dynamic impedance at IZT, and 3 µA leakage at 8 V reverse bias - enabling stable reference generation in portable power rails and low-voltage logic interfaces.
For engineers reviewing the SZMMBZ5240ELT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q101 qualification, 16 kV HBM ESD rating, 225 W peak pulse capability, and automotive-grade traceability - critical for battery management, sensor signal conditioning, and USB-C port protection designs.
Technical Context
This Zener regulator operates in reverse breakdown mode with a specified 10 V nominal voltage at 20 mA DC test current (IZT). Its temperature coefficient is +5.5 mV/°C near 10 V, ensuring predictable drift over −65°C to +150°C junction range. The device features a no-connect (NC) terminal (Pin 2), isolating internal structure from external circuitry.
Thermal performance is defined for FR-5 board (RJA = 556°C/W) and alumina substrate (RJA = 417°C/W), supporting design-in across consumer and automotive PCBs. Peak power handling (225 W, 8 × 20 µs pulse) enables robust transient voltage suppression without derating under short-duration surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.0 V nominal (9.5–10.5 V min/max) at 20 mA - sets precise clamping level for 3.3 V/5 V rail monitoring and reference buffering. |
| Power Dissipation (PD) | 225 mW on FR-5 board - supports continuous regulation in handheld devices without forced cooling. |
| Zener Impedance (ZZT) | 17 Ω at IZT = 20 mA - ensures low output impedance for stable voltage reference under load variation. |
| Leakage Current (IR) | 3 µA max at VR = 8 V - minimizes standby power loss in battery-powered systems. |
| ESD Rating | Class 3 (>16 kV HBM) - provides intrinsic ESD hardening for direct interface with exposed connectors or sensors. |
| Package | SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm - enables high-density placement on compact PCBs with automated assembly compatibility. |
| AEC-Q101 Qualified | Automotive-grade reliability validation - required for under-hood and ADAS subsystems where long-term parametric stability is mandatory. |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting epoxy, UL 94 V-0 rated, with cathode polarity band marking. Maximum soldering temperature: 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during regulation - must be tied to ground or common return in shunt configuration. |
| 2 | No Connection (NC) | Internally unconnected - electrically isolated; no PCB trace or pad required beyond mechanical support. |
| 3 | Cathode | Connected to regulated voltage node; carries full Zener current - requires adequate copper pour for thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and infotainment power supplies - meets stress testing and lifetime reliability requirements. |
| 16 kV HBM ESD rating | Eliminates need for external ESD protection diodes in USB, I²C, and analog sensor interfaces - reduces BOM count and board area. |
| 225 W peak pulse capability | Withstands 8 × 20 µs transients per IEC 61000-4-5 Level 3 - suitable for CAN bus termination and industrial I/O protection. |
| Pb-free (RoHS-compliant) | Meets global environmental compliance mandates without sacrificing thermal or electrical performance - compatible with lead-free reflow profiles. |
| Low leakage (3 µA @ 8 V) | Enables use in always-on battery backup circuits and real-time clock supervisors where quiescent current must remain sub-µA. |
Applications
| Automotive Body Control Module | USB-C Port Protection |
|---|---|
|
Use Scenario: Regulating 10 V reference for LIN transceiver bias and door module microcontroller reset circuitry. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable threshold for supervisor ICs and analog comparators. Use Value: Maintains 10.0 V ±5% accuracy across −40°C to +125°C ambient, ensuring reliable reset assertion despite battery voltage sag. |
Use Scenario: Clamping VBUS overvoltage transients during hot-plug events in portable accessories. IC Role / Device Role / Timing Role: Fast-acting transient suppressor placed directly at USB-C connector, limiting surge energy before it reaches PMIC. Use Value: 225 W peak pulse rating absorbs 8 × 20 µs surges up to ±15 kV without degradation - extends system-level ESD immunity beyond IEC 61000-4-2 Level 4. |
| Industrial Sensor Signal Conditioning | Smartphone Battery Management |
|
Use Scenario: Providing stable 10 V reference for 12-bit ADC input scaling in pressure and temperature sensor nodes. IC Role / Device Role / Timing Role: Precision voltage reference source with low dynamic impedance (17 Ω) minimizing code-to-code variation. Use Value: 17 Ω ZZT ensures <0.2 LSB error contribution from reference impedance across 0–100 kHz bandwidth - critical for high-fidelity sensor digitization. |
Use Scenario: Monitoring battery pack voltage via resistive divider with integrated overvoltage clamp in charging IC feedback loop. IC Role / Device Role / Timing Role: Low-leakage (3 µA @ 8 V) shunt regulator protecting charger controller from cell overvoltage faults. Use Value: Sub-µA standby current preserves battery shelf life while maintaining fast response (<10 ns) to overvoltage events during fast-charge cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C10LT1G | 10 V nominal, 350 mW rating, 20 Ω ZZT, no AEC-Q101 qualification | Higher power but lacks automotive qualification and 16 kV ESD rating | Select when higher continuous power (350 mW) is needed and automotive compliance is not required. |
| SZBZX84C10LT1G | 10 V nominal, 350 mW, AEC-Q101 qualified, 20 Ω ZZT, 15 kV HBM ESD | Same automotive grade but larger ZZT and lower ESD rating than SZMMBZ5240ELT1G | Choose when board layout allows larger thermal margin and 15 kV ESD suffices for target environment. |
Compared with BZX84-C10LT1G and SZBZX84C10LT1G, SZMMBZ5240ELT1G offers tighter ZZT (17 Ω vs. 20 Ω), superior ESD robustness (16 kV vs. 15 kV), and optimized 225 mW thermal profile for ultra-compact layouts - making it preferred for space- and reliability-critical automotive and portable designs.
Availability
SZMMBZ5240ELT1G is available at Aetrix Electronics and suitable for automotive body electronics, USB-C interface protection, industrial sensor nodes, and smartphone battery management systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SZMMBZ5240ELT1G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
SZMMBZ5240ELT1G belongs to the AEC-Q101-qualified MMBZ52xx/SZMMBZ52xx Zener series - engineered specifically for automotive and high-reliability portable electronics needing compact, robust voltage regulation with minimal board footprint.
FAQ
What is the Zener voltage tolerance of SZMMBZ5240ELT1G?
The SZMMBZ5240ELT1G has a nominal Zener voltage of 10.0 V with a tolerance of ±5%, resulting in a guaranteed range of 9.5 V to 10.5 V at 20 mA test current (IZT). This tolerance is verified per onsemi's Electrical Characteristics table and applies across the full operating temperature range of −65°C to +150°C junction temperature.
Is SZMMBZ5240ELT1G suitable for automotive applications?
Yes, SZMMBZ5240ELT1G is AEC-Q101 qualified and PPAP capable, with manufacturing site and control change tracking enabled by the "SZ" prefix. It meets automotive reliability standards for temperature cycling, humidity testing, and long-term parametric stability - making it appropriate for body control modules, infotainment power supplies, and ADAS sensor interfaces.
What is the maximum peak pulse power rating for SZMMBZ5240ELT1G?
SZMMBZ5240ELT1G is rated for 225 W peak pulse power under an 8 × 20 µs waveform per Figure 9 in the datasheet. This rating reflects non-repetitive surge capability and is validated for transient suppression in applications such as CAN bus protection and USB-C hot-plug events without permanent degradation.
Does SZMMBZ5240ELT1G have a no-connect pin, and how should it be handled on the PCB?
Yes, Pin 2 of SZMMBZ5240ELT1G is a no-connect (NC) terminal per the datasheet's pinout specification (Style 8). It must remain unconnected on the PCB - no trace, pad, or via should be routed to this pin. The NC pin serves only mechanical anchoring and does not participate in electrical operation.
How does the ESD rating of SZMMBZ5240ELT1G compare to standard Zener diodes?
SZMMBZ5240ELT1G achieves Class 3 Human Body Model (HBM) ESD rating (>16 kV), significantly exceeding typical Zener diodes rated at 8–12 kV. This enhanced robustness eliminates the need for additional ESD protection components in sensitive interfaces like I²C buses, analog sensor inputs, and USB data lines - reducing system cost and complexity.
SZMMBZ5240ELT1G 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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZMMBZ5240ELT1G FAQ
1.How can I place an order for SZMMBZ5240ELT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5240ELT1G 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 SZMMBZ5240ELT1G reliable?
The price and inventory of SZMMBZ5240ELT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5240ELT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5240ELT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5240ELT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5240ELT1G?
SZMMBZ5240ELT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5240ELT1G 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 SZMMBZ5240ELT1G?
For technical support, including SZMMBZ5240ELT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5240ELT1G requirements.
6.How does Aetrix verify that SZMMBZ5240ELT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5240ELT1G 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 SZMMBZ5240ELT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5240ELT1G?
All SZMMBZ5240ELT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5240ELT1G, 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 SZMMBZ5240ELT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5240ELT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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