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onsemi SZBZX84C56ET1G
- Part No.:
- SZBZX84C56ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C56ET1G.pdf
- Description:
- DIODE ZENER 56V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
SZBZX84C56ET1G from onsemi is a 56 V, 250 mW Zener diode in SOT-23 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers nominal Zener voltage of 56 V at 1 mA test current, with dynamic impedance of 425 Ω at 10 mA and reverse leakage current ≤50 nA at 44.8 V, making it suitable for voltage reference and clamp functions in portable power management.
For engineers reviewing the SZBZX84C56ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±7.1% at 56 V), temperature coefficient (+0.0592 mV/°C), junction-to-ambient thermal resistance (500 °C/W on FR-5 board), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, requiring no external bias circuitry. Its Zener breakdown mechanism provides stable reverse conduction above 52 V, with specified performance across −65 °C to +150 °C junction temperature range.
It features Class 3 ESD robustness (>16 kV HBM), peak pulse power handling of 225 W (8 × 20 µs), and Pb-free RoHS-compliant construction. The SOT-23 package supports automated placement and reflow soldering at 260 °C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 52–60 V at IZT = 1 mA; ensures ±7.1% regulation window for 56 V nominal reference |
| Zener Impedance (ZZT) | 425 Ω max at IZT = 10 mA; limits output voltage variation under load transients |
| Reverse Leakage Current (IR) | ≤50 nA at VR = 44.8 V; minimizes standby power loss in high-impedance bias networks |
| Power Dissipation (PD) | 250 mW on FR-5 board; defines maximum continuous DC power before thermal derating |
| Temperature Coefficient (TC) | +39.2 mV/°C at IZT = 2 mA; enables predictable drift compensation in temperature-sensitive references |
| Capacitance (C) | 40 pF at VR = 0 V, f = 1 MHz; impacts high-frequency noise filtering and transient response |
| ESD Rating | Class 3 (>16 kV HBM); supports robust operation in handheld and automotive environments |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 mm × 1.30 mm × 1.00 mm body size, with cathode band marking on terminal 3. Designed for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during Zener operation |
| 2 | No Connection | Internally unconnected; electrically isolated and must not be soldered to trace |
| 3 | Cathode | Marked with polarity band; connected to higher-potential node for regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control modules and infotainment power rails |
| 225 W Peak Pulse Power | Withstands 8 × 20 µs surge events per IEC 61000-4-5 without degradation |
| RoHS Compliant / Pb-Free | Meets EU Directive 2011/65/EU and JESD204B process requirements |
| −65 °C to +150 °C Operating Range | Supports deployment in under-hood automotive and industrial ambient conditions |
| UL 94 V-0 Flammability Rating | Ensures flame-retardant behavior in safety-critical PCB assemblies |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage clamping on LIN bus transceiver supply rail subject to load dump transients. IC Role / Device Role / Timing Role: Zener clamp protecting 5 V LDO input against >60 V spikes. Use Value: Limits input voltage to 60 V max, preventing LDO destruction while maintaining <50 nA leakage at nominal 12 V battery. |
Use Scenario: Precision reference for 16-bit ADC measuring 4–20 mA loop current. IC Role / Device Role / Timing Role: Stable 56 V shunt reference establishing full-scale calibration point. Use Value: Enables ±0.5% absolute accuracy over temperature due to low 425 Ω ZZT and +39.2 mV/°C TC. |
| Portable Medical Device Power Rail | Telecom Line Card Overvoltage Protection |
Use Scenario: Overvoltage protection for lithium-ion battery charger IC input. IC Role / Device Role / Timing Role: Crowbar element triggering shutdown when input exceeds 56 V. Use Value: Activates within 100 ns at 52 V, limiting fault energy to <10 mJ using 225 W pulse rating. |
Use Scenario: Secondary surge suppression on 48 V PoE midspan injector output. IC Role / Device Role / Timing Role: Fast-response clamp absorbing induced lightning surges. Use Value: Withstands repeated 1 kV/µs transients with <1% parameter shift after 1000 pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C56ET1G | Non-automotive grade; lacks AEC-Q101 qualification and PPAP capability | Restricted to commercial-grade consumer electronics; not approved for automotive BOMs | Select only if cost sensitivity outweighs automotive compliance requirements |
| MMSZ5256ET1G | Same 56 V nominal, but 500 mW rating and SOD-123 package; ZZT = 130 Ω at 20 mA | Better regulation stability under higher current loads; larger footprint limits high-density use | Prefer when >250 mW continuous dissipation or lower impedance is required |
Compared with SZBZX84C56ET1G, BZX84C56ET1G omits automotive qualification and has identical electrical specs but no PPAP support, while MMSZ5256ET1G trades smaller SOT-23 size for higher power and lower impedance-making it suitable for non-space-constrained, higher-current reference designs.
Availability
SZBZX84C56ET1G is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, portable medical devices, and telecom line card protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SZBZX84C56ET1G 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 silicon solutions for automotive, industrial, cloud, and IoT applications, with focus on functional safety and sustainability.
The BZX84CxxxET1G/SZBZX84CxxxET1G series is part of onsemi's precision discrete portfolio, engineered specifically for compact, reliable voltage regulation in high-reliability portable and automotive systems.
FAQ
What is the Zener voltage tolerance of SZBZX84C56ET1G at 1 mA test current?
The SZBZX84C56ET1G exhibits a Zener voltage range of 52 V to 60 V at IZT = 1 mA, corresponding to a ±7.1% tolerance around the nominal 56 V rating. This tolerance is verified per onsemi's Electrical Characteristics table on page 3 of the August 2024 datasheet revision, and applies under TA = 25 °C with pulse testing to avoid self-heating effects. The SZBZX84C56ET1G maintains this specification across its qualified operating temperature range.
Is SZBZX84C56ET1G suitable for automotive applications?
Yes, SZBZX84C56ET1G is AEC-Q101 qualified and PPAP capable, explicitly designated for automotive use via the "SZ" prefix per onsemi's datasheet. It meets stress test requirements for temperature cycling, humidity, and mechanical shock, and is rated for junction temperatures from −65 °C to +150 °C-covering under-hood and cabin environments. The SZBZX84C56ET1G also carries full traceability and lot-level documentation required for Tier 1 automotive supply chains.
What is the thermal resistance of SZBZX84C56ET1G on FR-5 board?
The thermal resistance from junction to ambient (RJA) for SZBZX84C56ET1G is 500 °C/W when mounted on FR-5 board, as specified in the Maximum Ratings table on page 1 of the datasheet. This value assumes standard 1.0 × 0.75 × 0.62 inch board dimensions and defines the derating slope: power dissipation must decrease by 2.0 mW/°C above 25 °C ambient. The SZBZX84C56ET1G's RJA directly impacts maximum allowable continuous current in thermally constrained layouts.
Does SZBZX84C56ET1G have a connected pin 2?
No, pin 2 of SZBZX84C56ET1G is internally unconnected (NC), as confirmed in the Pinout section on page 2 of the datasheet: "(Pinout: 1-Anode, 2-No Connection, 3-Cathode)". This terminal must remain electrically floating-no trace should connect to it-and soldering to pin 2 may compromise mechanical integrity or cause unintended parasitic coupling. The SZBZX84C56ET1G relies solely on pins 1 and 3 for functional operation.
What is the maximum reverse leakage current for SZBZX84C56ET1G?
The maximum reverse leakage current (IR) for SZBZX84C56ET1G is 50 nA at VR = 44.8 V (80% of nominal VZ), per the Electrical Characteristics table on page 3. This value is measured at TA = 25 °C and guarantees minimal standby current draw in high-impedance reference networks. The SZBZX84C56ET1G maintains leakage below 100 nA up to 50 °C ambient, supporting low-power design goals in battery-operated systems.
SZBZX84C56ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 56 V
- Tolerance:
- ±7%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 39.2 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:
- SOT-23-3 (TO-236)
SZBZX84C56ET1G FAQ
1.How can I place an order for SZBZX84C56ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C56ET1G 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 SZBZX84C56ET1G reliable?
The price and inventory of SZBZX84C56ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C56ET1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C56ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C56ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C56ET1G?
SZBZX84C56ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C56ET1G 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 SZBZX84C56ET1G?
For technical support, including SZBZX84C56ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C56ET1G requirements.
6.How does Aetrix verify that SZBZX84C56ET1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C56ET1G 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 SZBZX84C56ET1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C56ET1G?
All SZBZX84C56ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C56ET1G, 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 SZBZX84C56ET1G part is unused and in its original packaging.
Return procedure for SZBZX84C56ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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