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onsemi S1ZMMBZ5240BLT1
- Part No.:
- S1ZMMBZ5240BLT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
S1ZMMBZ5240BLT1.pdf
- Description:
- IC REG LINEAR .225W SPCL SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:21,000
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Product details
Overview
S1ZMMBZ5240BLT1 from onsemi is a 10 V, 225 mW Zener voltage regulator diode in SOT-23 package, designed for precision voltage reference and overvoltage protection in space-constrained circuits. It delivers ±5% Zener voltage tolerance at 20 mA test current, exhibits 17 Ω dynamic impedance at IZT, and supports ≤3 µA reverse leakage at 8 V, making it suitable for battery-powered sensor nodes and portable power rail clamping.
For engineers reviewing the S1ZMMBZ5240BLT1 datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, thermal derating data, cathode-anode polarity mapping, ESD robustness (Class 3 HBM >16 kV), and direct alternatives with documented Zener voltage and impedance differences.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage across anode-to-cathode terminals under reverse bias. Its Zener breakdown mechanism provides predictable regulation at 10 V nominal with temperature coefficient of +5.5 mV/°C, and it sustains operation from −65°C to +150°C junction temperature.
Thermal performance is defined for FR-5 board mounting: 225 mW maximum dissipation at 25°C ambient, derated linearly at 1.8 mW/°C above that point, yielding 556°C/W junction-to-ambient thermal resistance. The SOT-23 package enables automated placement while limiting self-heating in high-density layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.5–10.5 V at 20 mA - ensures ±5% regulation accuracy for 3.3 V/5 V rail monitoring and feedback loops |
| Power Dissipation (PD) | 225 mW on FR-5 board - limits continuous current to ~22.5 mA at 10 V, defining safe operating area for low-power biasing |
| Zener Impedance (ZZT) | 17 Ω at IZT = 20 mA - determines output voltage stability under load transients; lower than 24 V+ variants |
| Reverse Leakage (IR) | ≤3 µA at VR = 8 V - minimizes quiescent current in always-on voltage sense circuits |
| ESD Rating | Class 3 (>16 kV HBM) - eliminates need for external ESD protection in handheld interface lines |
| Junction Temp Range | −65°C to +150°C - supports automotive under-hood and industrial control environments without derating |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package with void-free thermosetting case, corrosion-resistant finish, and UL 94 V-0 flammability rating. Cathode indicated by band; pin 2 is no connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node (e.g., ground or supply return); reverse-biased during regulation |
| 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or pad required |
| 3 | Cathode | Connected to regulated voltage node; carries full Zener current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free, Halogen-Free, RoHS Compliant | Meets global environmental compliance without sacrificing solderability or thermal cycling reliability |
| Automated Assembly Optimized | Standard SOT-23 footprint and marking enable high-yield pick-and-place and reflow without tombstoning |
| High-Density Footprint | 3.04 mm × 1.40 mm × 1.11 mm body size allows placement in <1.5 mm² board area per device |
| Stable Temperature Coefficient | +5.5 mV/°C near 10 V - enables predictable drift compensation in analog sensor signal chains |
Applications
| Portable Power Monitoring | USB-C Overvoltage Clamp |
|---|---|
|
Use Scenario: Real-time detection of 5 V rail deviation in Bluetooth earbuds during charging. IC Role / Device Role / Timing Role: Shunt voltage reference connected between VBUS and GND, sinking excess current when voltage exceeds 10.5 V. Use Value: Prevents LDO input overvoltage without adding series resistance or active circuitry-reducing BOM count and standby power. |
Use Scenario: Protection of USB-C port controller IC against transient surges from faulty chargers. IC Role / Device Role / Timing Role: Fast-acting clamp placed across VCONN line, conducting within nanoseconds when VIN >10.5 V. Use Value: Limits peak voltage to 10.5 V with ≤3 µA leakage at 8 V, preserving signal integrity during normal 5 V operation. |
| Industrial Sensor Biasing | Automotive CAN Transceiver Reference |
|
Use Scenario: Providing stable 10 V bias for MEMS pressure sensor bridge excitation in HVAC controllers. IC Role / Device Role / Timing Role: Precision Zener reference supplying constant current to Wheatstone bridge via series resistor. Use Value: Maintains ±0.5% bridge excitation accuracy over −40°C to +85°C ambient due to low TC and tight VZ tolerance. |
Use Scenario: Generating local 10 V reference for isolated CAN FD transceiver bias in engine control modules. IC Role / Device Role / Timing Role: Regulated voltage source for VIO pin of ISO1050-level isolators, ensuring logic compatibility. Use Value: AEC-Q101 qualified version (SZ prefix) available; supports 150°C junction operation without derating in under-hood designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5240BLT1G | Same Zener voltage range (9.5–10.5 V), identical SOT-23 package, but Pb-free "G" suffix and 3,000/reel tape format | Identical electrical behavior; differs only in RoHS compliance marking and packaging logistics | Select MMBZ5240BLT1G for new designs requiring explicit Pb-free certification documentation |
| BZX84-C10LT1G | 10 V nominal, ±5% tolerance, but higher ZZT = 20 Ω and 350 mW PD on FR-4 - less stable regulation under load | Better suited for higher-power clamping where 225 mW is insufficient; not drop-in due to different thermal derating curve | Choose BZX84-C10LT1G only when >225 mW dissipation is required and 3 Ω higher impedance is acceptable |
Compared with S1ZMMBZ5240BLT1, MMBZ5240BLT1G offers identical regulation performance with formal Pb-free compliance, while BZX84-C10LT1G trades tighter impedance control for higher power handling-requiring layout review for thermal management and voltage stability.
Availability
S1ZMMBZ5240BLT1 is available at Aetrix Electronics and suitable for portable power monitoring, USB-C overvoltage clamp, and industrial sensor biasing requiring stable component supply, consistent Zener voltage tolerance, and automotive-grade reliability.
Supply support for S1ZMMBZ5240BLT1 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, and consumer markets.
The MMBZ52xxBLT1G/SZMMBZ52xxBLT1G series was engineered for compact, high-reliability voltage regulation in space-constrained portable and automotive electronics-emphasizing low leakage, high ESD immunity, and AEC-Q101 qualification.
FAQ
What is the exact Zener voltage tolerance of S1ZMMBZ5240BLT1 at 20 mA?
The S1ZMMBZ5240BLT1 has a guaranteed Zener voltage range of 9.5 V to 10.5 V at IZT = 20 mA, representing ±5% tolerance around the nominal 10 V rating. This is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet, with no variation across temperature or lot.
Does S1ZMMBZ5240BLT1 have a built-in ESD protection rating?
Yes, S1ZMMBZ5240BLT1 is rated Class 3 per Human Body Model (HBM) with >16 kV ESD withstand capability. This is explicitly stated in the Features section of the datasheet and validated per AEC-Q101 stress testing protocols, eliminating need for external TVS diodes in many I/O protection schemes.
Is pin 2 of S1ZMMBZ5240BLT1 electrically connected internally?
No, pin 2 of S1ZMMBZ5240BLT1 is a no-connect terminal. The device uses only pins 1 (anode) and 3 (cathode) for operation. Pin 2 is physically present in the SOT-23 package but left unconnected internally-PCB layout must isolate this pad from all traces and planes.
Can S1ZMMBZ5240BLT1 be used in automotive applications?
Yes-S1ZMMBZ5240BLT1 meets AEC-Q101 requirements for stress testing and is PPAP-capable. While the base part is not automotive-qualified, its SZ-prefix variant (SZMMBZ5240BLT1G) is explicitly designated for automotive use with controlled site and change management, supporting under-hood temperature ranges up to +150°C.
What is the maximum allowable ambient temperature for continuous operation of S1ZMMBZ5240BLT1 at full 225 mW?
S1ZMMBZ5240BLT1 is rated for 225 mW dissipation only at TA = 25°C on FR-5 board. Above that, power must be linearly derated at 1.8 mW/°C. At 85°C ambient, maximum allowed dissipation drops to 117 mW (225 − (85−25)×1.8), corresponding to ~11.7 mA Zener current at 10 V.
S1ZMMBZ5240BLT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
S1ZMMBZ5240BLT1 FAQ
1.How can I place an order for S1ZMMBZ5240BLT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for S1ZMMBZ5240BLT1 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 S1ZMMBZ5240BLT1 reliable?
The price and inventory of S1ZMMBZ5240BLT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1ZMMBZ5240BLT1 is usually 5 days.
3.What payment methods are accepted for S1ZMMBZ5240BLT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1ZMMBZ5240BLT1 transactions.
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4.How is shipping managed for S1ZMMBZ5240BLT1?
S1ZMMBZ5240BLT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S1ZMMBZ5240BLT1 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 S1ZMMBZ5240BLT1?
For technical support, including S1ZMMBZ5240BLT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1ZMMBZ5240BLT1 requirements.
6.How does Aetrix verify that S1ZMMBZ5240BLT1 is sourced from the original manufacturer or authorized distributors?
All S1ZMMBZ5240BLT1 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 S1ZMMBZ5240BLT1 meets industry standards.
7.What is the process for return or replacement of S1ZMMBZ5240BLT1?
All S1ZMMBZ5240BLT1 units undergo pre-shipment inspection (PSI). If there is an issue with S1ZMMBZ5240BLT1, 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 S1ZMMBZ5240BLT1 part is unused and in its original packaging.
Return procedure for S1ZMMBZ5240BLT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
S1ZMMBZ5240BLT1 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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