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onsemi SZMM5Z27VT5G
- Part No.:
- SZMM5Z27VT5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z27VT5G.pdf
- Description:
- DIODE ZENER 27V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,339
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Product details
Overview
SZMM5Z27VT5G from onsemi is a 27 V, ±5% tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation, with 80 Ω maximum Zener impedance at 2 mA test current and 0.05 μA reverse leakage at 21.4 V, used for precision voltage clamping and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMM5Z27VT5G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal resistance (250 °C/W), ESD rating (>16 kV HBM), AEC-Q101 qualification, and SOD-523 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference and transient suppressor, leveraging silicon PN junction breakdown at precisely controlled 27 V nominal reverse voltage. Its design targets low-profile, high-reliability regulation in battery-powered systems where thermal management and board area are critical constraints.
The SOD-523 package enables surface-mount assembly with MSL 1 rating and 260 °C reflow compatibility, while the 100% matte tin lead finish ensures solderability and RoHS compliance. The −65 °C to +150 °C junction temperature range supports automotive under-hood and industrial ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V nominal, 25.1–28.9 V min/max at IZT = 2 mA - defines clamping threshold accuracy for overvoltage protection circuits |
| Power Rating (PD) | 500 mW at 25 °C, derated 4.0 mW/°C above - sets maximum continuous dissipation on FR-4 board with 1 cm² pad |
| Zener Impedance (ZZT) | 80 Ω max at IZT = 2 mA - determines regulation stiffness and output voltage variation under load changes |
| Reverse Leakage (IR) | 0.05 μA max at VR = 21.4 V - ensures minimal standby current in always-on protection paths |
| ESD Rating | Class 3 (>16 kV) per HBM - provides robust handling immunity during automated assembly and field operation |
| Thermal Resistance (RJA) | 250 °C/W - quantifies junction-to-ambient heat transfer efficiency on standard PCB layout |
| AEC-Q101 Qualified | Yes - confirms reliability validation for automotive electronic control units and infotainment systems |
Pinout & Package
SOD-523 package: 1.20 mm × 0.80 mm body, 0.60 mm height, void-free thermosetting plastic case, matte tin-plated terminals, cathode marked by band or "XX" code (e.g., "12" for SZMM5Z27VT5G).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage rail; reverse-biased terminal where Zener breakdown occurs |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential reference; completes current path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade qualification | AEC-Q101 qualified and PPAP capable - enables direct use in Tier-1 automotive modules without additional qualification |
| Pb-Free & RoHS compliant | 100% matte Sn finish, UL 94 V-0 epoxy - meets global environmental regulations and lead-free soldering requirements |
| Ultra-small footprint | 1.20 mm × 0.80 mm SOD-523 outline - saves >60% board area vs. SOD-323, enabling miniaturization of wearables and IoT sensors |
| High ESD robustness | Class 3 HBM (>16 kV) - eliminates need for external ESD protection in handheld USB/charging interfaces |
| Stable temperature coefficient | +0.05 %/°C typical TC of VZ - minimizes drift across −40 °C to +125 °C operating range in automotive environments |
Applications
| Smartphone Power Management | Automotive Infotainment Display |
|---|---|
Use Scenario: Clamping surge transients on USB Type-C VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing fast-response overvoltage protection upstream of PMIC input. Use Value: Prevents damage to 5 V tolerant USB interface ICs by limiting VBUS to ≤28.9 V with <10 ns response time. | Use Scenario: Stabilizing backlight LED driver supply rail against load dump spikes in 12 V automotive systems. IC Role / Device Role / Timing Role: Standby voltage clamp protecting constant-current LED driver IC inputs during ignition transients. Use Value: Maintains stable 27 V reference point with <0.05 μA leakage, reducing quiescent current in always-on display subsystems. |
| Industrial Sensor Node | Medical Wearable Battery Monitor |
Use Scenario: Protecting ADC reference input from ESD and overvoltage in wireless vibration sensor nodes. IC Role / Device Role / Timing Role: Precision Zener reference and ESD sink placed directly at ADC REF pin. Use Value: Delivers 27 V ±5% regulation with 80 Ω ZZT, ensuring <0.1% full-scale error contribution to 16-bit measurement accuracy. | Use Scenario: Regulating charging circuit feedback node in compact Li-ion battery health monitors. IC Role / Device Role / Timing Role: Low-leakage voltage reference establishing precise 27 V threshold for charge termination detection. Use Value: Enables accurate end-of-charge detection with only 0.05 μA reverse current, extending wearable runtime by minimizing parasitic drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C27LT1G | Same 27 V nominal, ±5% tolerance, but SOD-323 package (1.7 × 1.3 mm) and 300 mW rating | Larger footprint and lower power handling limit suitability for ultra-thin mobile designs | Choose when legacy SOD-323 layout exists and 300 mW suffices |
| MMSZ5258ET1G | 27 V nominal, ±5%, SOD-123 package (3.7 × 1.6 mm), 500 mW rating, but no AEC-Q101 qualification | Lacks automotive qualification and has higher thermal resistance (350 °C/W), limiting under-hood use | Choose for cost-sensitive industrial PCBs where automotive reliability is not required |
Compared with BZX584C27LT1G and MMSZ5258ET1G, SZMM5Z27VT5G uniquely combines AEC-Q101 qualification, SOD-523 miniaturization, and 500 mW power rating-making it the only option qualified for next-generation automotive camera modules and ultra-compact medical wearables requiring both space savings and automotive reliability.
Availability
SZMM5Z27VT5G is available at Aetrix Electronics and suitable for smartphone power management, automotive infotainment displays, and industrial sensor nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for SZMM5Z27VT5G 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.
SZMM5Z27VT5G belongs to the MM5ZxxxT1G/SZMM5ZxxxT1G series - a family of miniature Zener regulators designed specifically for space-constrained, high-reliability voltage clamping in portable and automotive electronics.
FAQ
What is the Zener voltage tolerance of SZMM5Z27VT5G?
The SZMM5Z27VT5G has a standard tolerance of ±5% around its nominal 27 V Zener voltage, meaning the actual breakdown voltage falls between 25.1 V and 28.9 V when tested at IZT = 2 mA and TA = 25 °C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet (Rev. 19, April 2025). The SZMM5Z27VT5G maintains this specification across its qualified operating temperature range.
Is SZMM5Z27VT5G qualified for automotive applications?
Yes, SZMM5Z27VT5G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and process controls. This qualification covers the full temperature range (−65 °C to +150 °C) and validates reliability for use in automotive ECUs, infotainment systems, and ADAS modules without additional stress testing.
What is the maximum power dissipation of SZMM5Z27VT5G on a standard PCB?
SZMM5Z27VT5G has a maximum steady-state power dissipation of 500 mW at TA = 25 °C on an FR-4 board with a 1 cm² copper pad, derating linearly at 4.0 mW/°C above that temperature. This value is specified in the "Maximum Ratings" table (page 1) and verified under defined thermal test conditions. Exceeding this limit risks thermal runaway and permanent degradation of the SZMM5Z27VT5G's Zener characteristics.
Does SZMM5Z27VT5G have ESD protection built-in?
Yes, SZMM5Z27VT5G features an ESD rating of Class 3 (>16 kV) per the Human Body Model (HBM), as documented in the "Specification Features" section of the datasheet. This intrinsic robustness eliminates the need for discrete ESD protection devices in many portable electronics designs. The SZMM5Z27VT5G achieves this through optimized junction design and packaging, not external components.
What is the reverse leakage current specification for SZMM5Z27VT5G?
The reverse leakage current (IR) for SZMM5Z27VT5G is specified as 0.05 μA maximum at VR = 21.4 V and TA = 25 °C, per the Electrical Characteristics table on page 3. This low leakage ensures minimal parasitic current draw in always-on protection circuits and contributes to high-accuracy voltage reference stability in precision analog systems using the SZMM5Z27VT5G.
SZMM5Z27VT5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±7.04%
- 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:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
SZMM5Z27VT5G FAQ
1.How can I place an order for SZMM5Z27VT5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z27VT5G 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 SZMM5Z27VT5G reliable?
The price and inventory of SZMM5Z27VT5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z27VT5G is usually 5 days.
3.What payment methods are accepted for SZMM5Z27VT5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z27VT5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z27VT5G?
SZMM5Z27VT5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z27VT5G 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 SZMM5Z27VT5G?
For technical support, including SZMM5Z27VT5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z27VT5G requirements.
6.How does Aetrix verify that SZMM5Z27VT5G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z27VT5G 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 SZMM5Z27VT5G meets industry standards.
7.What is the process for return or replacement of SZMM5Z27VT5G?
All SZMM5Z27VT5G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z27VT5G, 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 SZMM5Z27VT5G part is unused and in its original packaging.
Return procedure for SZMM5Z27VT5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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