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onsemi SZMM3Z56VT1G
- Part No.:
- SZMM3Z56VT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
SZMM3Z56VT1G.pdf
- Description:
- DIODE ZENER 56V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
SZMM3Z56VT1G from onsemi is a 56 V ±5% Zener voltage regulator diode in SOD−323 package, rated for 300 mW steady-state power dissipation at 25°C, with 200 Ω maximum Zener impedance at 2 mA test current and 0.05 µA reverse leakage at 39.2 V. It provides precision voltage reference and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMM3Z56VT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), low-profile SOD−323 footprint (1.7 mm × 1.25 mm × 0.9 mm), AEC−Q101 qualification, ESD robustness (>16 kV HBM), and thermal derating behavior above 25°C.
Technical Context
This device operates as a two-terminal voltage reference by maintaining a stable reverse breakdown voltage across its cathode-anode terminals under controlled Zener current. Its regulation performance depends on IZT = 2 mA test condition, temperature coefficient of +0.025%/°C (derived from 52.2 V to 63.8 V range over temperature), and junction-to-ambient thermal resistance of 416°C/W.
The SOD−323 package enables high-density PCB placement with minimal board area impact. Its Pb-free construction, UL 94 V−0 flammability rating, and 260°C soldering tolerance support automated assembly in automotive and industrial applications requiring PPAP compliance and traceable sourcing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 52 V min / 56 V nominal / 60 V max @ IZT = 2 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 300 mW @ TA = 25°C, derates 2.4 mW/°C above - sets maximum continuous power handling on FR-4 board |
| Zener Impedance (ZZT) | 200 Ω max @ IZT = 2 mA - determines voltage regulation stability under dynamic load changes |
| Reverse Leakage (IR) | 0.05 µA max @ VR = 39.2 V - ensures minimal standby current in voltage-clamp configurations |
| Capacitance (C) | 40 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity in RF-adjacent circuits |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - supports robust handling in manual assembly and field-replaceable modules |
| Operating Temperature | −65°C to +150°C junction/storage - enables use in under-hood automotive and industrial environments |
Pinout & Package
SOD−323 surface-mount package: 1.7 mm × 1.25 mm body, 0.9 mm height, cathode indicated by polarity band. Void-free molded plastic case with Pb-free plating, UL 94 V−0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; polarity band identifies this terminal for correct PCB orientation |
| 2 (Anode) | Reference/ground terminal | Typically tied to system ground or lower-potential rail; reverse-biased operation requires anode at lower potential than cathode |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Low-profile SOD−323 footprint | Enables placement on dense PCBs where height clearance < 0.9 mm is required, e.g., stacked modules |
| High ESD immunity (>16 kV HBM) | Reduces need for external ESD protection in handheld and portable designs with exposed I/O |
| Pb-free and RoHS compliant | Meets global environmental regulations and supports lead-free reflow profiles up to 260°C for 10 seconds |
| Stable temperature coefficient | +0.025%/°C typical drift (from 52.2 V to 63.8 V over full operating range) enables predictable regulation in varying ambient conditions |
Applications
| Cellular Phone Power Management | Automotive Cabin Control Module |
|---|---|
|
Use Scenario: Regulating bias voltage for RF front-end amplifiers and PMIC reference inputs in LTE/5G handsets. IC Role / Device Role / Timing Role: Voltage reference and transient clamp protecting sensitive analog circuitry from supply rail overshoot. Use Value: 56 V Zener threshold prevents damage during hot-swap events while 40 pF capacitance avoids RF interference with cellular bands. |
Use Scenario: Providing stable reference for microcontroller ADC inputs monitoring HVAC actuator position feedback. IC Role / Device Role / Timing Role: Precision voltage clamp ensuring consistent ADC code mapping across −40°C to +105°C ambient. Use Value: AEC−Q101 qualification and −65°C to +150°C operating range guarantee reliability in unheated cabin zones. |
| Industrial PLC Input Protection | Medical Portable Monitor Sensor Interface |
|
Use Scenario: Protecting 24 V DC input channels from induced surges on factory floor wiring harnesses. IC Role / Device Role / Timing Role: Overvoltage shunt limiting transient energy before it reaches downstream protection ICs or isolators. Use Value: 300 mW power rating and 200 Ω ZZT enable fast clamping response without thermal runaway during repetitive transients. |
Use Scenario: Stabilizing excitation voltage for strain-gauge-based blood pressure transducers in battery-powered monitors. IC Role / Device Role / Timing Role: Low-drift voltage reference source minimizing measurement offset error across operating temperature. Use Value: 0.05 µA leakage at 39.2 V ensures negligible current draw from ultra-low-power sensor signal chains. |
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-B56,115 (Nexperia) | Same 56 V nominal Zener, but 200 mW rating and 500 Ω ZZT @ 5 mA - higher impedance and lower power | Not AEC−Q101 qualified; suitable for commercial-grade consumer products only | Select when cost sensitivity outweighs automotive qualification and tighter impedance requirements |
| MMSZ5255B-TP (Micro Commercial Components) | 56 V nominal, 500 mW rating, 150 Ω ZZT @ 20 mA - higher power but different test current and impedance profile | Uses SOD-123 package (larger footprint: 2.7 mm × 1.4 mm) - requires PCB layout change | Choose when higher power margin is needed and board space allows larger package |
Compared with BZX384-B56,115 and MMSZ5255B-TP, the SZMM3Z56VT1G offers the optimal balance of AEC−Q101 compliance, compact SOD−323 size, and 200 Ω ZZT at 2 mA - making it preferred for automotive and space-constrained industrial designs where regulation precision and qualification are critical.
Availability
SZMM3Z56VT1G is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial programmable logic controllers, and medical portable monitors requiring stable component supply with full traceability and lifecycle management.
Supply support for SZMM3Z56VT1G 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The MM3ZxxxT1G/SZMM3ZxxxT1G series was designed specifically for compact, high-reliability voltage regulation in portable and automotive electronics - emphasizing small footprint, AEC−Q101 compliance, and robust ESD performance.
FAQ
What is the Zener voltage tolerance of SZMM3Z56VT1G?
The SZMM3Z56VT1G has a Zener voltage specification of 52 V minimum, 56 V nominal, and 60 V maximum at IZT = 2 mA and TA = 25°C, corresponding to a ±5% tolerance around the nominal value. This tolerance remains valid across the full operating temperature range, supported by its documented temperature coefficient behavior.
Is SZMM3Z56VT1G suitable for automotive applications?
Yes, SZMM3Z56VT1G is AEC−Q101 qualified and PPAP capable, with explicit automotive suitability noted in its product prefix "SZ" and datasheet documentation. It meets stringent reliability, thermal, and ESD requirements for under-hood and cabin electronics, including engine control, body modules, and ADAS sensors.
What is the maximum allowable junction temperature for SZMM3Z56VT1G?
The maximum junction and storage temperature for SZMM3Z56VT1G is +150°C, with a minimum of −65°C. This rating is specified in the Maximum Ratings table and validated through thermal characterization, enabling operation in demanding environments such as automotive powertrain and industrial motor drives.
How does the thermal derating of SZMM3Z56VT1G work above 25°C?
SZMM3Z56VT1G derates linearly at 2.4 mW/°C above 25°C ambient temperature, based on its 416°C/W junction-to-ambient thermal resistance. At 85°C ambient, its usable power dissipation drops to approximately 156 mW - a critical factor when designing for sustained operation in enclosed enclosures or high-temperature locations.
What packaging format is available for SZMM3Z56VT1G?
SZMM3Z56VT1G is supplied in Pb-free SOD−323 package on 3,000-unit tape-and-reel format, compatible with standard pick-and-place equipment. The marking "1D" identifies the 56 V variant, and the cathode is indicated by a polarity band - both confirmed in the official onsemi marking diagram and mechanical drawings.
SZMM3Z56VT1G 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):
- 56 V
- Tolerance:
- ±7%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 500 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 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
SZMM3Z56VT1G FAQ
1.How can I place an order for SZMM3Z56VT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM3Z56VT1G 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 SZMM3Z56VT1G reliable?
The price and inventory of SZMM3Z56VT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM3Z56VT1G is usually 5 days.
3.What payment methods are accepted for SZMM3Z56VT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM3Z56VT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM3Z56VT1G?
SZMM3Z56VT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM3Z56VT1G 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 SZMM3Z56VT1G?
For technical support, including SZMM3Z56VT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM3Z56VT1G requirements.
6.How does Aetrix verify that SZMM3Z56VT1G is sourced from the original manufacturer or authorized distributors?
All SZMM3Z56VT1G 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 SZMM3Z56VT1G meets industry standards.
7.What is the process for return or replacement of SZMM3Z56VT1G?
All SZMM3Z56VT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM3Z56VT1G, 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 SZMM3Z56VT1G part is unused and in its original packaging.
Return procedure for SZMM3Z56VT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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