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onsemi SZMM3Z27VT1G
- Part No.:
- SZMM3Z27VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z27VT1G.pdf
- Description:
- DIODE ZENER 27V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:14,023
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Product details
Overview
SZMM3Z27VT1G from onsemi is a 27 V, 300 mW Zener voltage regulator diode in SOD−323 package, designed for precision voltage reference and overvoltage protection in space-constrained circuits. It delivers nominal Zener voltage of 27 V at 2 mA test current, with dynamic impedance of 80 Ω at IZT and leakage current ≤0.05 µA at 18.9 V reverse bias - used in portable power rails and ESD-sensitive signal conditioning stages.
For engineers reviewing the SZMM3Z27VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 27 V regulation tolerance (±3.7%), low 70 pF capacitance at 0 V, AEC−Q101 qualification, and SOD−323 footprint compatibility with high-density PCB layouts in automotive infotainment and industrial sensor interfaces.
Technical Context
This device operates as a two-terminal, cathode-anode polarized Zener diode optimized for stable reverse-bias voltage clamping. Its 300 mW steady-state power rating and 416 °C/W junction-to-ambient thermal resistance define safe operating limits under FR-4 board conditions, with derating starting above 25 °C ambient.
The SZMM3Z27VT1G exhibits a positive temperature coefficient of +21.4 mV/°C for its 27 V Zener voltage, enabling predictable drift compensation in temperature-stable references. Its 16 kV HBM ESD rating and Pb-free SOD−323 construction support robust deployment in handheld and automotive electronics without additional transient suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.1–28.9 V at 2 mA - defines tight ±3.7% regulation window for 27 V nominal rail stabilization |
| Power Dissipation (PD) | 300 mW @ 25 °C - supports continuous clamping in low-power sensor biasing and ADC reference circuits |
| Zener Impedance (ZZT) | 80 Ω max @ 2 mA - ensures minimal output voltage variation under dynamic load transients |
| Leakage Current (IR) | ≤0.05 µA @ 18.9 V - enables ultra-low quiescent current operation in battery-backed systems |
| Capacitance (C) | 70 pF @ 0 V, 1 MHz - preserves signal integrity in RF-coupled or high-speed analog front-ends |
| ESD Rating | Class 3 (>16 kV HBM) - eliminates need for external ESD diodes in USB, audio jack, and button interface protection |
| Package | SOD−323 (Case 477) - 1.7 mm × 1.25 mm × 0.9 mm footprint ideal for 0402-replacement layouts |
Pinout & Package
SOD−323 surface-mount package with cathode indicated by polarity band; body dimensions 1.7 mm × 1.25 mm × 0.9 mm; mounting position unrestricted; Pb-free plating (Sn only).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; must be held at higher potential than anode during regulation |
| 2 (Anode) | Reference/ground terminal | Tied to system ground or lower-potential rail; completes reverse-bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including infotainment power supplies and body control modules |
| Low-profile SOD−323 | 0.9 mm height enables stacking under shields and placement in tight gaps between BGA packages |
| High ESD immunity | 16 kV Human Body Model rating allows direct integration into exposed I/O lines without guard rings |
| Pb-free and RoHS compliant | Sn-only termination compatible with lead-free reflow profiles up to 260 °C for 10 seconds |
| Stable temperature coefficient | +21.4 mV/°C enables predictable drift tracking for compensated reference designs |
Applications
| Automotive Infotainment Power Rail | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating 27 V supply for LCD backlight drivers and audio amplifiers in head units. IC Role / Device Role / Timing Role: Voltage reference and overvoltage clamp protecting downstream PMIC inputs. Use Value: Maintains stable 27 V within ±3.7% across −40 °C to +125 °C, eliminating need for active regulation. |
Use Scenario: Biasing bridge sensors and setting reference thresholds in 4–20 mA transmitter circuits. IC Role / Device Role / Timing Role: Precision shunt reference providing known voltage drop for current loop calibration. Use Value: 80 Ω Zener impedance minimizes error contribution (<0.2% FS) under varying loop loads. |
| Portable Medical Device Battery Monitor | USB-C Port ESD Protection |
Use Scenario: Monitoring Li-ion pack voltage via resistive divider with low-quiescent-current reference. IC Role / Device Role / Timing Role: Low-leakage (≤0.05 µA) Zener reference enabling multi-year battery life in wearable monitors. Use Value: Enables accurate 27 V threshold detection without loading the divider network or draining standby current. |
Use Scenario: Clamping CC line transients in USB-C receptacles before entering controller ICs. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing ESD pulses while preserving signal integrity. Use Value: 70 pF capacitance avoids signal degradation on 10 Gbps USB-C data lanes; 16 kV HBM rating meets IEC 61000-4-2 Level 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 |
|---|---|---|---|
| BZX384-B27,115 | 27 V, 300 mW, SOD-323, but ±5% tolerance (25.65–28.35 V) vs. SZMM3Z27VT1G's ±3.7% (25.1–28.9 V); 100 Ω ZZT vs. 80 Ω | Less precise regulation; higher dynamic impedance increases output ripple in sensitive analog circuits | Acceptable where tighter voltage tolerance is not required and cost is prioritized |
| MMSZ5256ET1G | 27 V, 500 mW, SOD-123; larger footprint (3.5 mm × 1.6 mm); 30 Ω ZZT; no AEC-Q101 qualification | Higher power handling but incompatible with SOD−323 layout; lacks automotive qualification | Preferred only when >300 mW dissipation is needed and board space allows SOD-123 |
Compared with BZX384-B27,115 and MMSZ5256ET1G, the SZMM3Z27VT1G offers superior voltage accuracy and lower dynamic impedance in the smallest footprint, while its AEC−Q101 qualification makes it uniquely suitable for automotive-grade designs where both size and reliability are critical.
Availability
SZMM3Z27VT1G is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor transmitters, and portable medical monitoring devices requiring stable component supply and long-term lifecycle continuity.
Supply support for SZMM3Z27VT1G 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 cloud infrastructure markets.
The SZMM3Z27VT1G belongs to the MM3ZxxxT1G/SZMM3ZxxxT1G series - engineered for high-density, low-power voltage regulation and ESD protection in space-constrained portable and automotive electronics.
FAQ
What is the Zener voltage tolerance of SZMM3Z27VT1G?
The SZMM3Z27VT1G has a nominal Zener voltage of 27 V with a minimum of 25.1 V and maximum of 28.9 V at 2 mA test current, corresponding to a ±3.7% tolerance. This tighter specification compared to standard 5% Zeners supports precision reference applications in ADC biasing and sensor excitation circuits where voltage stability directly impacts measurement accuracy.
Is SZMM3Z27VT1G suitable for automotive applications?
Yes, SZMM3Z27VT1G is AEC−Q101 qualified and PPAP capable, with the "SZ" prefix indicating compliance for automotive and other high-reliability applications. Its operating junction temperature range of −65 °C to +150 °C, 16 kV HBM ESD rating, and Pb-free SOD−323 construction meet stringent requirements for engine control units, ADAS camera modules, and infotainment power supplies.
What is the thermal resistance of SZMM3Z27VT1G?
The SZMM3Z27VT1G has a junction-to-ambient thermal resistance (RJA) of 416 °C/W when mounted on a single-sided FR-4 PCB with a 1 cm² copper pad. This value determines how much the junction temperature rises above ambient per milliwatt of dissipated power - critical for calculating safe operating area in continuous-clamp configurations.
Does SZMM3Z27VT1G have polarity marking?
Yes, SZMM3Z27VT1G uses a cathode polarity band to identify Pin 1. The SOD−323 package follows standard orientation: the band marks the cathode terminal, which must be connected to the higher-potential side of the circuit during Zener operation. Incorrect orientation results in forward conduction (VF ≈ 0.9 V), not regulation.
What is the maximum reverse leakage current for SZMM3Z27VT1G?
The maximum reverse leakage current (IR) for SZMM3Z27VT1G is 0.05 µA at a reverse voltage (VR) of 18.9 V. This ultra-low leakage supports battery-powered applications where standby current must be minimized - such as in portable gas detectors or wearable health monitors using 27 V reference rails.
SZMM3Z27VT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 300 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-323
SZMM3Z27VT1G FAQ
1.How can I place an order for SZMM3Z27VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z27VT1G 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 SZMM3Z27VT1G reliable?
The price and inventory of SZMM3Z27VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z27VT1G is usually 5 days.
3.What payment methods are accepted for SZMM3Z27VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z27VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z27VT1G?
SZMM3Z27VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z27VT1G 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 SZMM3Z27VT1G?
For technical support, including SZMM3Z27VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z27VT1G requirements.
6.How does Aetrix verify that SZMM3Z27VT1G is sourced from the original manufacturer or authorized distributors?
All SZMM3Z27VT1G 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 SZMM3Z27VT1G meets industry standards.
7.What is the process for return or replacement of SZMM3Z27VT1G?
All SZMM3Z27VT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z27VT1G, 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 SZMM3Z27VT1G part is unused and in its original packaging.
Return procedure for SZMM3Z27VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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