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onsemi SZBZX84C47LT1
- Part No.:
- SZBZX84C47LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C47LT1.pdf
- Description:
- DIODE ZENER 47V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:27,000
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Product details
Overview
SZBZX84C47LT1 from onsemi is a 47 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 170 Ω dynamic impedance at 5 mA test current and 90 µA maximum reverse leakage at 37.6 V, used for precision voltage regulation in portable power rails and ESD-protected signal conditioning circuits.
For engineers reviewing the SZBZX84C47LT1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode-anode terminal mapping, automotive-grade AEC-Q101 qualification status, and direct alternatives with documented tolerance and impedance differences.
Technical Context
This device operates as a two-terminal voltage reference diode with reverse-biased breakdown at nominal 47 V, specified under pulsed test conditions (IZT = 5 mA, TA = 25°C). Its temperature coefficient is +0.2 mV/°C, indicating positive drift over operating range −65°C to +150°C.
The SOT-23 package features Pin 1 (Anode), Pin 2 (No Connection), Pin 3 (Cathode), and supports automated placement with ESD rating >16 kV (HBM). It is Pb-free and AEC-Q101 qualified for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 44 V to 50 V @ 5 mA - defines regulated output voltage window under standard bias |
| Power Dissipation | 225 mW on FR-5 board @ 25°C - sets maximum continuous DC power handling before thermal derating |
| Zener Impedance | 170 Ω @ 5 mA - determines AC regulation stability and ripple rejection capability |
| Reverse Leakage | 90 µA @ 37.6 V - limits standby current in high-impedance bias networks |
| Capacitance | 40 pF @ 0 V, 1 MHz - affects high-frequency noise filtering and signal integrity in RF-adjacent paths |
| Temp Coefficient | +0.2 mV/°C @ 5 mA - quantifies voltage drift per degree Celsius for thermal design margining |
| ESD Rating | Class 3 (>16 kV HBM) - enables direct interface with exposed I/O without external protection |
Pinout & Package
SOT-23 (Case 318-08) surface-mount package with 3 terminals: Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode; polarity indicated by band on cathode side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; must be held ≤37.6 V to avoid leakage-dominated operation |
| 2 | No Connection | Internally unconnected; no PCB trace or pad required; must remain floating |
| 3 | Cathode | Connected to regulated voltage rail; polarity band on package identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive power supply monitoring and infotainment subsystems requiring zero-failure reliability |
| 225 mW FR-5 rating | Enables compact voltage clamping in space-constrained handheld PCBs without forced airflow or heatsinking |
| 16 kV HBM ESD rating | Eliminates need for discrete TVS in low-speed data lines like I²C or GPIO voltage translation |
| Pb-free SOT-23 package | Complies with RoHS and ELV directives; compatible with lead-free reflow profiles up to 260°C for 10 seconds |
Applications
| Portable Power Rail Regulation | ESD-Sensitive Signal Conditioning |
|---|---|
Use Scenario: Regulating 47 V bias for analog front-end amplifiers in battery-powered medical sensors. IC Role / Device Role / Timing Role: Zener diode providing stable reference voltage for op-amp biasing and ADC input scaling. Use Value: Tight 44–50 V tolerance ensures consistent gain calibration across production units without trimming. | Use Scenario: Clamping I²C bus lines in automotive body control modules exposed to ISO 10605 transients. IC Role / Device Role / Timing Role: Bidirectional transient suppressor leveraging reverse Zener action and forward diode conduction. Use Value: 16 kV HBM rating allows direct placement at connector interface without added protection components. |
| High-Density PC Board Voltage Reference | Automotive Cabin Temperature Sensor Interface |
Use Scenario: Generating local 47 V reference for isolated gate drivers in compact motor control inverters. IC Role / Device Role / Timing Role: Precision shunt regulator stabilizing auxiliary supply feeding optocoupler LED drive circuitry. Use Value: 170 Ω dynamic impedance maintains <1% output variation under 1–5 mA load swings. | Use Scenario: Biasing NTC thermistor networks in HVAC control units operating across −40°C to +125°C ambient. IC Role / Device Role / Timing Role: Temperature-compensated voltage reference enabling linearized resistance-to-voltage conversion. Use Value: +0.2 mV/°C coefficient minimizes measurement error drift over full automotive temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C47LT1 | Same electrical specs but non-automotive grade; lacks AEC-Q101 qualification and SZ prefix | Not approved for automotive safety-critical or mission-relevant systems | Select when cost sensitivity outweighs automotive compliance requirements |
| SZBZX84C47LT1G | Identical electrical and mechanical specs; "G" suffix denotes Pb-free variant only | No functional difference; both meet RoHS and JEDEC J-STD-020 reflow standards | Prefer for new designs requiring documented Pb-free compliance and traceability |
Compared with BZX84C47LT1, SZBZX84C47LT1 adds AEC-Q101 validation and site-controlled change management; compared with SZBZX84C47LT1G, it shares all performance metrics but may differ in Pb-free documentation scope and lot traceability depth.
Availability
SZBZX84C47LT1 is available at Aetrix Electronics and suitable for portable power rail regulation, ESD-sensitive signal conditioning, and high-density PC board voltage reference applications requiring stable component supply across automotive, industrial, and medical product lifecycles.
Supply support for SZBZX84C47LT1 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
SZBZX84C47LT1 belongs to the BZX84CxxxLT1 family of Zener regulators designed specifically for space-constrained, high-reliability voltage reference and transient suppression in automotive and portable electronics.
FAQ
What is the Zener voltage tolerance of SZBZX84C47LT1?
The SZBZX84C47LT1 has a nominal Zener voltage of 47 V with a tolerance range of 44 V to 50 V when tested at 5 mA (IZT). This ±5% specification is defined per the BZX84C series standard tolerance grade and applies under ambient temperature of 25°C with pulsed current testing. The SZBZX84C47LT1 datasheet confirms this range in Table 3 under "VZ1 (Volts) @ IZT1 = 5 mA".
Does SZBZX84C47LT1 have an internal connection on Pin 2?
No, Pin 2 of the SZBZX84C47LT1 is internally not connected (NC). The device uses only Pins 1 (Anode) and 3 (Cathode) for electrical operation. This is explicitly stated in the "Pinout: 1-Anode, 2-No Connection, 3-Cathode" note on page 2 and confirmed in the marking diagram on page 3 of the official datasheet. PCB layout must leave Pin 2 unconnected.
Is SZBZX84C47LT1 qualified for automotive applications?
Yes, SZBZX84C47LT1 is AEC-Q101 qualified and PPAP capable, as stated in the Features section of the datasheet. The "SZ" prefix specifically denotes parts manufactured under automotive-grade process controls and site-specific change management requirements. This makes SZBZX84C47LT1 suitable for use in automotive cabin electronics, body control modules, and powertrain auxiliary circuits.
What is the maximum reverse leakage current for SZBZX84C47LT1?
The maximum reverse leakage current for SZBZX84C47LT1 is 90 µA, measured at VR = 37.6 V (80% of nominal Zener voltage) and TA = 25°C. This value is listed in the Electrical Characteristics table on page 3 under "Max Reverse Leakage Current" for device Y16. It reflects worst-case off-state conduction that must be accounted for in high-impedance bias networks.
Can SZBZX84C47LT1 be used in place of BZX84C47LT1?
Yes, SZBZX84C47LT1 can replace BZX84C47LT1 electrically and mechanically, but with added automotive qualification. Both share identical Zener voltage, impedance, capacitance, and SOT-23 pinout. However, SZBZX84C47LT1 includes AEC-Q101 validation, enhanced process controls, and site-specific change management-making it suitable where automotive compliance is mandatory, while BZX84C47LT1 remains appropriate for commercial-grade applications.
SZBZX84C47LT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±6%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 170 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZBZX84C47LT1 FAQ
1.How can I place an order for SZBZX84C47LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C47LT1 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 SZBZX84C47LT1 reliable?
The price and inventory of SZBZX84C47LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C47LT1 is usually 5 days.
3.What payment methods are accepted for SZBZX84C47LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C47LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C47LT1?
SZBZX84C47LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C47LT1 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 SZBZX84C47LT1?
For technical support, including SZBZX84C47LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C47LT1 requirements.
6.How does Aetrix verify that SZBZX84C47LT1 is sourced from the original manufacturer or authorized distributors?
All SZBZX84C47LT1 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 SZBZX84C47LT1 meets industry standards.
7.What is the process for return or replacement of SZBZX84C47LT1?
All SZBZX84C47LT1 units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C47LT1, 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 SZBZX84C47LT1 part is unused and in its original packaging.
Return procedure for SZBZX84C47LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C47LT1 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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