My Inquiry
My Account
onsemi SZMM5Z27VT1G
- Part No.:
- SZMM5Z27VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z27VT1G.pdf
- Description:
- DIODE ZENER 27V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:4
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZMM5Z27VT1G from onsemi is a 27 V, ±5% tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 80 Ω maximum Zener impedance at 1 mA test current and 0.05 μA reverse leakage at 21.4 V. It provides precision voltage regulation and overvoltage clamping in space-constrained portable electronics.
For engineers reviewing the SZMM5Z27VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal derating behavior, ESD robustness (16 kV HBM), low-profile SOD-523 footprint, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference and transient suppressor, leveraging silicon PN-junction Zener breakdown at 27 V nominal. Its 1 mA Zener test current (IZT) and 0.5 mA knee current (IZK) define stable regulation onset and low-current performance boundaries.
Thermal design is constrained by 250 °C/W junction-to-ambient resistance on FR-4 board and 4.0 mW/°C linear derating above 25 °C. The SOD-523 package enables mounting in any orientation with MSL 1 reflow compatibility up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.1–28.9 V @ IZT = 1 mA; ensures stable 27 V reference under defined bias with ±5% tolerance |
| Power Dissipation (PD) | 500 mW @ TA = 25 °C; supports continuous regulation in compact PCB layouts without forced cooling |
| Zener Impedance (ZZT) | 80 Ω max @ IZT = 1 mA; limits output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | 0.05 μA @ VR = 21.4 V; minimizes standby current in battery-powered systems |
| ESD Rating | Class 3 (>16 kV HBM); protects downstream circuitry from human-body electrostatic discharge events |
| Temperature Coefficient | +18.9 mV/°C @ IZT; quantifies VZ drift across operating temperature range |
| Capacitance | 70 pF @ VR = 0 V, f = 1 MHz; defines high-frequency impedance for noise filtering applications |
Pinout & Package
Package: SOD-523 (Case 502), dimensions 1.20 mm × 0.80 mm × 0.60 mm, cathode-marked with band, Pb-free matte tin lead finish, MSL 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage rail; polarity marker essential for correct PCB placement and functional clamping |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential node; completes Zener conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including infotainment power rails and sensor interface protection |
| Low Profile (0.60 mm height) | Enables stacking under shields or integration into ultra-thin mobile phone modules and wearables |
| 16 kV HBM ESD Robustness | Eliminates need for external ESD protection diodes in handheld USB/charging port interfaces |
| Stable 27 V Regulation at 1 mA | Supports precise biasing of analog comparators and reference inputs in 3.3 V/5 V microcontroller systems |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements for consumer and industrial end equipment |
Applications
| USB Power Input Protection | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping 5 V USB supply transients in portable medical monitors. IC Role / Device Role: Voltage clamp protecting LDO input and MCU VDD pins from >6 V surges. Use Value: Prevents latch-up or damage to 5 V-tolerant peripherals using 27 V Zener standoff margin and 16 kV HBM immunity. |
Use Scenario: Generating clean 27 V reference for reset supervisor IC threshold setting. IC Role / Device Role: Precision voltage source defining brown-out detection level in battery-backed systems. Use Value: Enables accurate 27 V trigger point with ±5% tolerance and <0.05 μA leakage to extend coin-cell life. |
| Automotive Infotainment Display Bias | High-Density PC Board Voltage Reference |
Use Scenario: Regulating backlight LED driver IC bias rail in automotive head units. IC Role / Device Role: Stable 27 V supply for gate drive or op-amp bias in display power management ICs. Use Value: Maintains consistent brightness control via 80 Ω ZZT limiting ripple-induced dimming variation. |
Use Scenario: Providing local 27 V reference for ADC calibration in FPGA-based test equipment. IC Role / Device Role: Low-capacitance (70 pF) voltage reference minimizing signal path loading. Use Value: Reduces measurement error from capacitive coupling while fitting within 1.2 mm × 0.8 mm PCB area budget. |
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 mm × 1.3 mm); 350 mW PD; 110 Ω ZZT | Larger footprint and lower power rating limit use in ultra-dense layouts or higher-power clamping | Select when SOD-323 is already standardized in BOM and 350 mW suffices |
| MMSZ5258ET1G | 27 V nominal, ±5%, SOD-123 package (3.7 mm × 1.6 mm); 500 mW PD; 35 Ω ZZT @ 20 mA | Higher Zener test current (20 mA vs. 1 mA) yields lower impedance but requires larger bias resistor network | Prefer where lower dynamic impedance is critical and board space allows SOD-123 |
Compared with BZX584C27LT1G and MMSZ5258ET1G, SZMM5Z27VT1G delivers the smallest footprint (SOD-523), highest ESD rating (16 kV), and AEC-Q101 qualification-making it optimal for next-gen automotive and portable designs demanding miniaturization and reliability.
Availability
SZMM5Z27VT1G is available at Aetrix Electronics and suitable for USB power protection, microcontroller reset circuits, automotive infotainment displays, and high-density PC board voltage references requiring stable component supply and long-term lifecycle support.
Supply support for SZMM5Z27VT1G 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.
SZMM5Z27VT1G belongs to the MM5Z/SZMM5Z series of miniature Zener regulators designed specifically for space-constrained, high-reliability applications including automotive electronics and portable consumer devices.
FAQ
What is the Zener voltage tolerance of SZMM5Z27VT1G?
SZMM5Z27VT1G has a nominal Zener voltage of 27 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 25.1 V and 28.9 V when tested at 1 mA (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet, and applies under standard conditions of TA = 25 °C.
Is SZMM5Z27VT1G qualified for automotive applications?
Yes, SZMM5Z27VT1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Specification Features" section of the datasheet. The "SZ" prefix denotes compliance with automotive-specific site and process controls, making SZMM5Z27VT1G suitable for use in automotive infotainment, body control modules, and ADAS sensor interfaces.
What is the maximum power dissipation for SZMM5Z27VT1G at 85 °C ambient?
At 85 °C ambient, SZMM5Z27VT1G's maximum power dissipation is 260 mW. This is calculated using the 4.0 mW/°C derating factor from the Maximum Ratings table: 500 mW − (85 − 25) × 4.0 mW = 260 mW. Derating assumes mounting on an FR-4 board with a 1 cm² copper pad per the datasheet note.
Does SZMM5Z27VT1G have a defined cathode marking?
Yes, SZMM5Z27VT1G uses Style 1 marking per the Mechanical Case Outline diagram: Pin 1 is the cathode and is identified by a polarity band on the SOD-523 package body. The band must be aligned toward the designated cathode net on the PCB to ensure correct Zener conduction direction during overvoltage events.
What is the reverse leakage current specification for SZMM5Z27VT1G?
SZMM5Z27VT1G specifies a maximum reverse leakage current (IR) of 0.05 μA at a reverse voltage (VR) of 21.4 V, as listed in the Electrical Characteristics table. This low leakage supports extended battery life in always-on portable devices and ensures minimal parasitic loading on reference nodes.
SZMM5Z27VT1G 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%
- 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
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
SZMM5Z27VT1G FAQ
1.How can I place an order for SZMM5Z27VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z27VT1G 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 SZMM5Z27VT1G reliable?
The price and inventory of SZMM5Z27VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z27VT1G is usually 5 days.
3.What payment methods are accepted for SZMM5Z27VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z27VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z27VT1G?
SZMM5Z27VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z27VT1G 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 SZMM5Z27VT1G?
For technical support, including SZMM5Z27VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z27VT1G requirements.
6.How does Aetrix verify that SZMM5Z27VT1G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z27VT1G 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 SZMM5Z27VT1G meets industry standards.
7.What is the process for return or replacement of SZMM5Z27VT1G?
All SZMM5Z27VT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z27VT1G, 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 SZMM5Z27VT1G part is unused and in its original packaging.
Return procedure for SZMM5Z27VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZMM5Z27VT1G Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
