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onsemi MMSZ11T1
- Part No.:
- MMSZ11T1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ11T1.pdf
- Description:
- DIODE ZENER 11V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,801
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Product details
Overview
MMSZ11T1 from onsemi is a 500 mW, 11 V ±5% Zener voltage regulator diode in SOD−123 surface-mount package, designed for precision voltage reference and overvoltage protection in low-power analog and digital circuits. It delivers stable regulation at IZT = 5 mA with dynamic impedance of 20 Ω, operates across −55°C to +150°C, and features ESD rating >16 kV (HBM).
For engineers reviewing the MMSZ11T1 datasheet, pinout, applications, or equivalent options, this device is selected for compact voltage clamping, power rail stabilization, and biasing in space-constrained industrial sensors, automotive body electronics, and portable instrumentation where thermal robustness and AEC−Q101 qualification are critical.
Technical Context
The MMSZ11T1 functions as a two-terminal reverse-biased silicon junction device that maintains a stable 11 V nominal breakdown voltage under controlled Zener current. Its operation relies on avalanche-dominated breakdown above ~6 V, confirmed by temperature coefficient data showing +4.5 mV/°C typical near 11 V.
It exhibits 150 °C/W junction-to-lead thermal resistance and 340 °C/W junction-to-ambient resistance on FR−5 board, enabling reliable 500 mW dissipation up to 75°C ambient before derating. Reverse leakage is limited to 0.1 μA at VR = 8.8 V, supporting low-quiescent-current designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10.45–11.55 V @ IZT = 5 mA - ensures ±5% tolerance for accurate voltage clamping in 12 V rail monitoring. |
| Zener Impedance (ZZT) | 20 Ω max @ IZT = 5 mA - minimizes output voltage variation under load transients in reference circuits. |
| Power Dissipation (PD) | 500 mW on FR−5 board @ TL = 75°C - supports continuous operation in thermally constrained PCB layouts. |
| Reverse Leakage (IR) | 0.1 μA max @ VR = 8.8 V - preserves signal integrity in high-impedance bias networks and sensor interfaces. |
| ESD Rating | Class 3 (>16 kV) per HBM - enables direct integration into exposed I/O lines without external protection. |
| Operating Temperature | −55°C to +150°C - qualified for under-hood automotive and industrial control environments. |
| Package | SOD−123 (1.60 × 2.69 × 1.16 mm) - compatible with standard 0805 footprint reflow processes and high-density routing. |
Pinout & Package
SOD−123 surface-mount package with cathode indicated by polarity band; leads are solderable with UL 94 V−0 flammability rating and 260°C/10s maximum soldering temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal where Zener breakdown occurs. |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential reference; completes current path during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive applications including body control modules and lighting drivers requiring zero-failure reliability. |
| 500 mW Power Rating | Enables single-device overvoltage suppression for 3.3 V, 5 V, and 12 V logic rails without heatsinking. |
| ±5% Zener Tolerance | Reduces binning requirements and simplifies BOM management across production lots. |
| Low 0.1 μA Leakage | Minimizes error in precision op-amp feedback networks and battery-powered sensor biasing. |
| Pb−Free (RoHS Compliant) | Meets global environmental compliance mandates without performance trade-offs or assembly restrictions. |
Applications
| Automotive Body Control Unit | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping CAN transceiver supply rail against load-dump transients in door module ECUs. IC Role / Device Role / Timing Role: Voltage clamp protecting 12 V input stage from >200 V spikes. Use Value: Prevents latch-up in transceivers using only 11 V Zener threshold and 500 mW surge capability per Figure 4. |
Use Scenario: Providing stable 11 V reference for 16-bit ADC in pressure transducer front-end. IC Role / Device Role / Timing Role: Precision shunt reference establishing analog ground-referenced bias point. Use Value: Achieves <0.5% full-scale error contribution due to ±5% VZ tolerance and <20 Ω ZZT. |
| Portable Medical Instrumentation | Smart Home Power Management |
Use Scenario: Regulating bias voltage for low-noise instrumentation amplifier in handheld ECG monitor. IC Role / Device Role / Timing Role: Low-leakage (0.1 μA) shunt regulator stabilizing op-amp VREF node. Use Value: Maintains baseline stability over battery discharge cycle without loading 3.7 V Li-ion supply. |
Use Scenario: Overvoltage protection for USB-C PD negotiation circuitry in smart plug controller. IC Role / Device Role / Timing Role: Fast-response clamp limiting 12 V auxiliary rail to safe levels during fault events. Use Value: Activates within nanoseconds at 11 V threshold, surviving 100 W non-repetitive surges per Figure 4. |
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-C11 | Same 11 V nominal, but 300 mW rating and SOT-23 package; higher ZZT (30 Ω) and wider tolerance (±6%). | Lower power handling limits use in sustained-clamp scenarios; SOT-23 footprint differs from SOD−123. | Select when cost sensitivity outweighs thermal margin and board space is not constrained. |
| MMBZ5240BT1G | 10 V nominal, 225 mW, SOT-23; tighter ±5% tolerance but lower power and different VZ point. | Not interchangeable for 11 V reference; requires redesign of voltage divider or feedback network. | Choose only if system design allows 10 V reference and layout accommodates SOT-23 placement. |
Compared with BZX84-C11 and MMBZ5240BT1G, the MMSZ11T1 provides superior thermal performance (500 mW vs. ≤300 mW), lower dynamic impedance (20 Ω vs. ≥30 Ω), and automotive-grade qualification-making it optimal for high-reliability, space-constrained voltage regulation where precise 11 V clamping is required.
Availability
MMSZ11T1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, portable medical devices, and smart home power management systems requiring stable component supply and long-term lifecycle support.
Supply support for MMSZ11T1 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, and consumer markets.
The MMSZxxxT1G series was developed specifically for high-reliability, surface-mount Zener regulation in automotive and industrial applications-emphasizing AEC−Q101 qualification, tight voltage tolerance, and robust thermal performance in miniature SOD−123 packaging.
FAQ
What is the Zener voltage tolerance of the MMSZ11T1?
The MMSZ11T1 has a nominal Zener voltage of 11 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 10.45 V and 11.55 V when tested at IZT = 5 mA and TA = 25°C. This tolerance is guaranteed per onsemi's datasheet revision 13 and applies across the full operating temperature range.
Is the MMSZ11T1 suitable for automotive applications?
Yes, the MMSZ11T1 is AEC−Q101 qualified and PPAP capable, making it suitable for automotive applications such as body control modules, lighting drivers, and infotainment power supplies. Its −55°C to +150°C operating range and robust ESD rating (>16 kV HBM) meet stringent automotive reliability requirements.
What is the maximum power dissipation of the MMSZ11T1 on a standard PCB?
The MMSZ11T1 is rated for 500 mW total power dissipation on an FR−5 board at lead temperature (TL) = 75°C. Above 75°C, it derates linearly at 6.7 mW/°C. This rating assumes proper copper pour and thermal relief design per onsemi's recommended layout guidelines.
Does the MMSZ11T1 have Pb-free construction?
Yes, the MMSZ11T1 is manufactured in a Pb-free (RoHS-compliant) SOD−123 package, marked with "G" suffix per onsemi's ordering nomenclature. The device meets JEDEC J-STD-020 moisture sensitivity level 1 and supports standard lead-free reflow profiles up to 260°C for 10 seconds.
How does the MMSZ11T1 compare to the MMSZ10T1G in terms of voltage and leakage?
The MMSZ11T1 offers a higher nominal Zener voltage (11 V vs. 10 V) and slightly higher reverse leakage (0.1 μA vs. 0.2 μA at VR = 8.0 V). Both share identical SOD−123 packaging, 500 mW rating, and AEC−Q101 qualification-but the MMSZ11T1's tighter leakage supports more sensitive analog reference designs.
MMSZ11T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ11T1 FAQ
1.How can I place an order for MMSZ11T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ11T1 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 MMSZ11T1 reliable?
The price and inventory of MMSZ11T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ11T1 is usually 5 days.
3.What payment methods are accepted for MMSZ11T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ11T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ11T1?
MMSZ11T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ11T1 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 MMSZ11T1?
For technical support, including MMSZ11T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ11T1 requirements.
6.How does Aetrix verify that MMSZ11T1 is sourced from the original manufacturer or authorized distributors?
All MMSZ11T1 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 MMSZ11T1 meets industry standards.
7.What is the process for return or replacement of MMSZ11T1?
All MMSZ11T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ11T1, 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 MMSZ11T1 part is unused and in its original packaging.
Return procedure for MMSZ11T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ11T1 Tags
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