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onsemi MMSZ27T3G
- Part No.:
- MMSZ27T3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ27T3G.pdf
- Description:
- DIODE ZENER 27V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:20,045
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Product details
Overview
MMSZ27T3G from onsemi is a 27 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at 75°C ambient, with 80 Ω dynamic impedance at 2 mA test current and 0.05 μA reverse leakage at 18.9 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog sensor interfaces and microcontroller I/O protection circuits.
For engineers reviewing the MMSZ27T3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, AEC−Q101 qualification status, Pb−free compliance, and direct alternative part comparisons grounded in onsemi's official MMSZxxxT1G Series documentation.
Technical Context
This device operates as a two-terminal silicon Zener diode optimized for stable reverse-biased regulation. Its 27 V nominal Zener voltage is specified at IZT = 2 mA with ±5% tolerance, and exhibits a temperature coefficient near +0.045 mV/°C (inferred from Figure 1 for ~27 V range), enabling predictable drift compensation in industrial temperature ranges.
The SOD−123 package supports automated placement and provides 150 °C/W junction-to-lead thermal resistance. It achieves Class 3 ESD robustness (>16 kV HBM) and meets UL 94 V−0 flammability rating - critical for automotive and high-reliability embedded systems where board-level surge immunity and solder reliability are mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.65–28.35 V @ IZT = 2 mA - defines tight regulation window for 27 V rail clamping or reference generation |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - sets maximum continuous power handling on FR−5 PCB before thermal derating applies |
| Zener Impedance (ZZT) | 80 Ω max @ IZT = 2 mA - determines AC ripple rejection capability in low-noise reference designs |
| Reverse Leakage (IR) | 0.05 μA max @ VR = 18.9 V - ensures minimal quiescent current draw in battery-powered standby circuits |
| Junction Temp Range | −55°C to +150°C - enables operation in under-hood automotive, industrial motor control, and outdoor IoT environments |
| ESD Rating | Class 3 (>16 kV HBM) - protects against electrostatic discharge during handling and system integration |
| AEC−Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HTOL, TC, and HTRB |
Pinout & Package
SOD−123 surface-mount package: 2-pin, 1.60 × 2.69 × 1.16 mm body, cathode indicated by band marking, void-free thermosetting plastic case with UL 94 V−0 rating and corrosion-resistant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased voltage reference terminal requiring proper polarity orientation |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes Zener conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables use in higher-current regulation tasks than standard 200–300 mW Zeners without forced cooling |
| ±5% Zener Voltage Tolerance | Supports accurate voltage thresholding in safety-critical monitoring circuits without post-calibration trimming |
| AEC−Q101 Qualification | Validates long-term reliability for automotive infotainment, ADAS sensor modules, and body control units |
| Pb−Free & RoHS Compliant | Meets global environmental regulations and eliminates lead contamination risk in reflow soldering processes |
| Class 3 ESD Robustness | Reduces field failure risk in handheld tools, portable medical devices, and factory-floor instrumentation |
Applications
| Industrial Sensor Signal Conditioning | Automotive Microcontroller I/O Protection |
|---|---|
Use Scenario: Stabilizing bias voltage for analog front-end amplifiers in pressure or temperature transducers operating across −40°C to +125°C. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference and overvoltage clamp for op-amp input stages. Use Value: Maintains <±1% output stability over temperature via low TC and tight 27 V tolerance, reducing calibration overhead. |
Use Scenario: Protecting CAN/LIN bus interface pins of automotive ECUs from load-dump transients and ESD events. IC Role / Device Role / Timing Role: Fast-acting voltage clamp limiting pin voltage to 27 V during 12 V system surges. Use Value: Survives >16 kV HBM ESD strikes and dissipates transient energy within 500 mW limit without latch-up. |
| Low-Power Battery Monitoring | Programmable Logic Supply Clamp |
Use Scenario: Providing reference voltage for ADC-based Li-ion cell voltage measurement in wearables and asset trackers. IC Role / Device Role / Timing Role: Precision shunt regulator establishing known 27 V reference for ratiometric scaling. Use Value: Draws only 0.05 μA leakage at 18.9 V, extending battery life in multi-year deployments. |
Use Scenario: Clamping FPGA or CPLD I/O supply rails during hot-swap or power sequencing anomalies. IC Role / Device Role / Timing Role: Passive overvoltage protector absorbing short-duration spikes above 27 V. Use Value: Limits rail excursion to safe levels using 80 Ω Zener impedance, preventing logic corruption or latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27LT1G | Same 27 V nominal, but 300 mW rating and 100 Ω ZZT @ 5 mA - lower power handling and higher impedance | Less suitable for sustained 2 mA+ regulation loads; better for low-current biasing | Select when board space allows larger SOT-23 footprint and thermal budget is constrained |
| MMSZ27ET3G | Same SOD−123 package and 27 V rating, but ±2% tolerance and tighter 60 Ω ZZT - higher precision variant | Preferred for metrology-grade references where 2% tolerance justifies cost premium | Choose when absolute voltage accuracy outweighs cost sensitivity in test equipment or calibration modules |
Compared with BZX84-C27LT1G, MMSZ27T3G delivers 67% higher power margin and 25% lower dynamic impedance; versus MMSZ27ET3G, it trades ±2% tolerance for broader availability and lower unit cost while retaining identical thermal and ESD performance.
Availability
MMSZ27T3G is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive microcontroller I/O protection, and low-power battery monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MMSZ27T3G 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 specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MMSZ27T3G belongs to the MMSZxxxT1G Series - a family of AEC−Q101-qualified Zener diodes designed specifically for reliable voltage regulation and transient suppression in harsh-environment electronics.
FAQ
What is the Zener voltage tolerance of the MMSZ27T3G?
The MMSZ27T3G has a nominal Zener voltage of 27 V with a standard tolerance of ±5%, meaning its actual reverse breakdown voltage falls between 25.65 V and 28.35 V when tested at IZT = 2 mA. This tolerance is confirmed in Table 3 of the onsemi datasheet and applies across the full operating temperature range of −55°C to +150°C. The MMSZ27T3G maintains this specification without requiring binning or selection.
Is the MMSZ27T3G suitable for automotive applications?
Yes, the MMSZ27T3G is AEC−Q101 qualified and PPAP capable, making it suitable for automotive applications including body electronics, infotainment systems, and sensor interfaces. Its SOD−123 package passes high-temperature operating life (HTOL), temperature cycling (TC), and highly accelerated stress testing (HAST) per AEC−Q101 standards. The MMSZ27T3G also features Class 3 ESD robustness (>16 kV HBM), critical for vehicle assembly line environments.
What is the maximum power dissipation of the MMSZ27T3G at 100°C ambient?
At 100°C ambient temperature, the MMSZ27T3G must be derated from its 500 mW rating at 75°C. Using the specified derating factor of 6.7 mW/°C above 75°C, the allowable power drops to 332.5 mW (500 mW − [25°C × 6.7 mW/°C]). This value is derived directly from the "Maximum Ratings" table in the onsemi datasheet and reflects safe continuous operation without exceeding junction temperature limits.
Does the MMSZ27T3G have Pb−free construction?
Yes, the MMSZ27T3G is Pb−free and RoHS compliant, as indicated by the "G" suffix in its part number and confirmed in the "Ordering Information" section of the onsemi datasheet. The device uses a void-free, transfer-molded thermosetting plastic case with corrosion-resistant finish, and complies with JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) for reflow compatibility. The MMSZ27T3G meets all applicable environmental directives for global electronics manufacturing.
How does the MMSZ27T3G compare to the MMSZ27ET3G?
The MMSZ27T3G and MMSZ27ET3G share identical package (SOD−123), nominal voltage (27 V), and power rating (500 mW), but differ in tolerance: MMSZ27T3G is ±5%, while MMSZ27ET3G is ±2%. The tighter tolerance version also offers lower dynamic impedance (60 Ω vs. 80 Ω at IZT). Both are AEC−Q101 qualified and Pb−free. The MMSZ27T3G remains the preferred choice for cost-sensitive, high-volume applications where ±5% meets system requirements.
MMSZ27T3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 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
MMSZ27T3G FAQ
1.How can I place an order for MMSZ27T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ27T3G 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 MMSZ27T3G reliable?
The price and inventory of MMSZ27T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ27T3G is usually 5 days.
3.What payment methods are accepted for MMSZ27T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ27T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ27T3G?
MMSZ27T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ27T3G 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 MMSZ27T3G?
For technical support, including MMSZ27T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ27T3G requirements.
6.How does Aetrix verify that MMSZ27T3G is sourced from the original manufacturer or authorized distributors?
All MMSZ27T3G 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 MMSZ27T3G meets industry standards.
7.What is the process for return or replacement of MMSZ27T3G?
All MMSZ27T3G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ27T3G, 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 MMSZ27T3G part is unused and in its original packaging.
Return procedure for MMSZ27T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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