My Inquiry
My Account
onsemi SZBZX84C47ET1G
- Part No.:
- SZBZX84C47ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C47ET1G.pdf
- Description:
- DIODE ZENER 47V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZBZX84C47ET1G from onsemi is a 47 V, 250 mW surface-mount Zener diode in SOT-23 package, designed for precision voltage regulation and overvoltage protection in space-constrained circuits. It delivers nominal Zener voltage of 47 V at 5 mA test current, with dynamic impedance of 170 Ω and temperature coefficient of +32.9 mV/°C, and is widely used in power supply feedback loops and voltage reference circuits for portable electronics.
For engineers reviewing the SZBZX84C47ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±3 V), low leakage current (≤0.05 µA at 37.6 V), AEC-Q101 qualification, Pb-free RoHS compliance, and thermal resistance of 500 °C/W on FR-5 board.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in silicon PN junction. Its Zener voltage is specified at three test currents (2 mA, 10 mA, and 20 mA), enabling stable regulation across varying load conditions. The cathode-anode polarity is marked by a band, and terminal 2 is internally unconnected.
The SOT-23 package supports automated placement and reflow soldering, with UL 94 V-0 flammability rating and ESD robustness exceeding 16 kV (HBM Class 3). Junction temperature range spans −65 °C to +150 °C, supporting automotive under-hood and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44–50 V at IZT = 5 mA - ensures tight regulation window for 47 V nominal reference |
| Power Dissipation | 250 mW on FR-5 board - defines maximum continuous DC power handling at 25 °C ambient |
| Zener Impedance (ZZT) | 170 Ω at IZT = 5 mA - determines output voltage stability under small-signal AC variations |
| Reverse Leakage Current | ≤0.05 µA at VR = 37.6 V - guarantees minimal quiescent current in standby mode |
| Temperature Coefficient | +32.9 mV/°C at IZT = 5 mA - quantifies voltage drift per degree Celsius near room temperature |
| Capacitance | 40 pF at VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and transient response |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling during PCB assembly without external protection |
Pinout & Package
SOT-23 (TO-236) plastic surface-mount package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish; cathode indicated by band; rated for 260 °C for 10 seconds during soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential side of regulated node; reverse-biased during Zener operation |
| 2 | No Connection | Internally isolated; no electrical function - must remain unconnected on PCB |
| 3 | Cathode | Connected to higher-potential side; carries full Zener current and defines regulated output voltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics |
| Pb-free and RoHS compliant | Meets global environmental regulations without compromising solderability or reliability |
| Peak pulse power: 225 W | Withstands 8 × 20 µs transients (e.g., ISO 7637-2 pulses) without degradation |
| Low capacitance (40 pF) | Minimizes signal coupling in high-speed analog or RF-adjacent circuits |
| High ESD immunity (Class 3) | Eliminates need for external ESD protection in handheld and portable designs |
Applications
| Power Supply Feedback | Voltage Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated DC-DC converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener reference sets precise threshold for TL431 or shunt regulator IC input. Use Value: Tight 44–50 V tolerance ensures ±2% output accuracy across line/load variations. |
Use Scenario: Providing stable bias voltage for op-amp comparators in battery management systems. IC Role / Device Role / Timing Role: Acts as passive voltage reference source independent of supply rail fluctuations. Use Value: Low 0.05 µA leakage preserves microamp-level sleep current in energy-harvesting nodes. |
| Overvoltage Clamp | Automotive Sensor Interface |
Use Scenario: Protecting ADC inputs from transient surges in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Clamps induced spikes above 50 V to prevent damage to downstream CMOS circuitry. Use Value: 225 W peak pulse rating absorbs ISO 16750-2 load dump energy without failure. |
Use Scenario: Stabilizing supply rails for Hall-effect position sensors in EPS and transmission control units. IC Role / Device Role / Timing Role: Maintains clean 47 V reference for sensor excitation in harsh automotive environments. Use Value: AEC-Q101 qualification and −65 °C to +150 °C operation ensure functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C47ET1G | Same Zener voltage range (44–50 V), identical SOT-23 package, but not AEC-Q101 qualified; lower ESD rating (Class 2). | Limited to commercial-grade consumer and computing applications; unsuitable for automotive production. | Select when cost sensitivity outweighs automotive qualification requirements and ESD exposure is controlled. |
| MMSZ47ET1G | 47 V Zener, same 250 mW rating, but SOD-123 package (larger footprint); slightly higher ZZT (200 Ω @ 5 mA). | Requires PCB layout change due to different pad geometry; better thermal dissipation on FR-4. | Choose when higher board-level reliability is needed and SOT-23 density constraints are relaxed. |
Compared with BZX84C47ET1G, SZBZX84C47ET1G adds AEC-Q101 validation and Class 3 ESD for automotive use; versus MMSZ47ET1G, it offers smaller SOT-23 footprint and tighter Zener tolerance but lower thermal mass.
Availability
SZBZX84C47ET1G is available at Aetrix Electronics and suitable for automotive power management, industrial sensor conditioning, and portable device voltage reference applications requiring stable component supply and long-term lifecycle support.
Supply support for SZBZX84C47ET1G 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 specializing in energy-efficient technologies for automotive, industrial, cloud, and IoT applications.
SZBZX84C47ET1G belongs to the BZX84CxxxET1G family of Zener regulators, engineered for compact, reliable voltage stabilization in high-density and mission-critical electronic systems.
FAQ
What is the Zener voltage tolerance of SZBZX84C47ET1G at 5 mA test current?
The SZBZX84C47ET1G has a Zener voltage range of 44 V to 50 V at IZT = 5 mA, corresponding to a nominal 47 V with ±3 V tolerance. This specification is verified per onsemi's August 2024 datasheet revision 11 and reflects guaranteed performance across manufacturing lots and temperature extremes.
Is SZBZX84C47ET1G suitable for automotive applications?
Yes, SZBZX84C47ET1G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its −65 °C to +150 °C operating range and robust ESD rating meet stringent automotive reliability requirements.
What is the thermal resistance of SZBZX84C47ET1G on FR-5 board?
The thermal resistance (RJA) of SZBZX84C47ET1G is 500 °C/W when mounted on FR-5 board at TA = 25 °C. This value decreases with forced airflow or copper pour, and derating begins above 25 °C at 2.0 mW/°C - critical for thermal design in enclosed enclosures.
Does SZBZX84C47ET1G have a connected pin 2?
No, pin 2 of SZBZX84C47ET1G is internally unconnected (NC), as confirmed in the datasheet pinout diagram (Style 8). It must remain floating on the PCB layout; routing or soldering to this terminal may cause unintended behavior or mechanical stress.
What is the maximum reverse leakage current for SZBZX84C47ET1G?
The maximum reverse leakage current for SZBZX84C47ET1G is 0.05 µA at VR = 37.6 V, measured per the datasheet's Electrical Characteristics table. This ultra-low leakage supports energy-sensitive applications such as battery-backed real-time clocks and low-power IoT endpoints.
SZBZX84C47ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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)
SZBZX84C47ET1G FAQ
1.How can I place an order for SZBZX84C47ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C47ET1G 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 SZBZX84C47ET1G reliable?
The price and inventory of SZBZX84C47ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C47ET1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C47ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C47ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C47ET1G?
SZBZX84C47ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C47ET1G 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 SZBZX84C47ET1G?
For technical support, including SZBZX84C47ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C47ET1G requirements.
6.How does Aetrix verify that SZBZX84C47ET1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C47ET1G 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 SZBZX84C47ET1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C47ET1G?
All SZBZX84C47ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C47ET1G, 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 SZBZX84C47ET1G part is unused and in its original packaging.
Return procedure for SZBZX84C47ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C47ET1G 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…
