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onsemi SZBZX84B9V1LT1G
- Part No.:
- SZBZX84B9V1LT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84B9V1LT1G.pdf
- Description:
- DIODE ZENER 9.1V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:17,959
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Product details
Overview
SZBZX84B9V1LT1G from onsemi is a tight-tolerance Zener diode in SOT-23 package, delivering 9.1 V nominal regulation at 5 mA with ±0.18 V tolerance (8.92–9.28 V), 15 Ω dynamic impedance, and 0.5 μA reverse leakage at 7.2 V. It provides precision voltage reference and overvoltage clamping in space-constrained power rails for portable electronics and automotive ECUs.
For engineers reviewing the SZBZX84B9V1LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal coefficient (3.8 mV/°C), junction-to-ambient thermal resistance (500 °C/W), and AEC-Q101 qualification for automotive use.
Technical Context
This device operates as a two-terminal voltage reference with cathode-anode polarity, requiring no external bias circuitry. Its tight 2% Zener voltage tolerance (±0.18 V) and low temperature coefficient (3.8 mV/°C) enable stable regulation across −55°C to +150°C ambient range.
Designed for surface-mount assembly on FR-5 boards, it delivers 250 mW power dissipation at 25°C with derating to 2.0 mW/°C above that temperature. The SOT-23 package supports automated pick-and-place and reflow soldering per JEDEC J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 9.1 V nominal at 5 mA test current; min/max 8.92–9.28 V ensures ≤2% tolerance in production voltage references. |
| Zener Impedance | 15 Ω at 5 mA; maintains <100 mV output variation under ±10 mA load transients. |
| Reverse Leakage | 0.5 μA max at 7.2 V; enables low-quiescent-current protection in battery-powered systems. |
| Temperature Coefficient | +3.8 mV/°C at 5 mA; predictable drift allows compensation in precision analog circuits. |
| Power Dissipation | 250 mW on FR-5 board at 25°C; derates linearly to zero at 75°C ambient. |
| Junction Temp Range | −65°C to +150°C; supports under-hood automotive and industrial control applications. |
| ESD Rating | Class 3 (>16 kV HBM); withstands handling and board-level ESD without parameter shift. |
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; pin 2 is unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; forward-biased during normal operation of associated circuitry. |
| 2 | No Connection | Internally isolated; must remain floating-no PCB trace or pad connection permitted. |
| 3 | Cathode | Connected to regulated voltage node; carries full Zener current during regulation/clamping. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors. |
| Tight Voltage Tolerance | ±0.18 V (2%) at 5 mA enables direct replacement of higher-cost reference ICs in non-critical analog rails. |
| Pb-Free & RoHS Compliant | Meets global environmental regulations; compatible with lead-free reflow profiles up to 260°C for 10 seconds. |
| Low Capacitance | 130 pF at 0 V bias; minimizes signal distortion in high-frequency clamp or snubber applications. |
| High ESD Robustness | Class 3 HBM (>16 kV) eliminates need for external ESD protection in handheld and infotainment designs. |
Applications
| Automotive Body Control Module | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Regulating 9.1 V supply rail for LIN transceivers and door module microcontrollers. IC Role / Device Role / Timing Role: Two-terminal shunt regulator maintaining stable bias voltage despite battery swing (9–16 V) and load dump transients. Use Value: Eliminates need for three-terminal LDO in cost-sensitive modules while meeting AEC-Q101 reliability requirements. | Use Scenario: Clamping VBUS overvoltage during USB-C hot-plug events in portable docking stations. IC Role / Device Role / Timing Role: Fast-response shunt protector limiting transient spikes to ≤9.28 V before TVS activation. Use Value: 15 Ω Zener impedance ensures sub-100 ns response to 100 V/μs transients without oscillation. |
| Industrial Sensor Signal Conditioning | Medical Wearable Reference |
Use Scenario: Providing stable 9.1 V reference for 24-bit ADC front-end in pressure transducer modules. IC Role / Device Role / Timing Role: Precision voltage reference with <±0.5 mV drift over −40°C to +85°C operating range. Use Value: 3.8 mV/°C tempco allows software compensation to achieve <0.01% total error across full temperature range. | Use Scenario: Biasing op-amp input stages in FDA Class II wearable ECG amplifiers. IC Role / Device Role / Timing Role: Low-leakage (0.5 μA max) voltage clamp protecting analog inputs from ESD and electrode contact faults. Use Value: Class 3 HBM rating and 130 pF capacitance prevent signal coupling into sensitive biopotential paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84B9V1LT1G | Same electrical specs but lacks SZ-prefix AEC-Q101 qualification and PPAP capability. | Not approved for automotive production; suitable only for industrial or consumer prototypes. | Select when automotive compliance is not required and cost is primary constraint. |
| SZBZX84C9V1LT1G | Looser 5% tolerance (8.5–9.6 V), higher 15 μA leakage at 7.2 V, same 15 Ω Zz. | Acceptable for non-critical power rail clamping where voltage accuracy is secondary to cost. | Choose for general-purpose protection where ±0.5 V variation is tolerable. |
Compared with BZX84B9V1LT1G, SZBZX84B9V1LT1G adds automotive qualification and tighter process control; versus SZBZX84C9V1LT1G, it trades wider tolerance for guaranteed 2% accuracy and lower leakage-critical for precision analog and safety-relevant functions.
Availability
SZBZX84B9V1LT1G is available at Aetrix Electronics and suitable for automotive body electronics, USB-C power delivery protection, industrial sensor signal conditioning, and medical wearable reference circuits requiring stable component supply and AEC-Q101 compliance.
Supply support for SZBZX84B9V1LT1G 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
SZBZX84BxxxLT1G belongs to onsemi's AEC-Q101-qualified Zener diode family, engineered specifically for automotive subsystems requiring robust voltage regulation and transient suppression in harsh environments.
FAQ
What is the Zener voltage tolerance of SZBZX84B9V1LT1G at 5 mA?
SZBZX84B9V1LT1G has a nominal Zener voltage of 9.1 V with a tight tolerance of ±0.18 V (8.92–9.28 V) at 5 mA test current. This 2% tolerance is specified in the BZX84BxxxL tight-tolerance series and distinguishes it from the standard-tolerance C-series variants. The value is measured under pulse conditions at 25°C ambient per onsemi datasheet revision 23.
Is SZBZX84B9V1LT1G qualified for automotive applications?
Yes, SZBZX84B9V1LT1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the onsemi datasheet. The "SZ" prefix denotes devices manufactured under automotive-specific site and process controls. It meets all stress tests-including temperature cycling, humidity bias, and mechanical shock-required for under-hood and cabin electronics.
What is the maximum power dissipation of SZBZX84B9V1LT1G on an FR-5 board?
SZBZX84B9V1LT1G is rated for 250 mW total power dissipation on FR-5 board at 25°C ambient, with linear derating of 2.0 mW/°C above that temperature. At 75°C ambient, dissipation drops to zero. This rating assumes standard JEDEC 2-layer board layout and is validated per onsemi's thermal characterization methodology.
Does SZBZX84B9V1LT1G have a connected pin 2?
No, pin 2 of SZBZX84B9V1LT1G is internally unconnected (NC), as confirmed in the datasheet's pinout diagram (Style 8) and Electrical Characteristics tables. It must remain electrically floating on the PCB-no trace, via, or copper pour should connect to this terminal to avoid performance degradation or device failure.
What is the reverse leakage current specification for SZBZX84B9V1LT1G?
SZBZX84B9V1LT1G specifies a maximum reverse leakage current of 0.5 μA at VR = 7.2 V and TA = 25°C. This value is measured under DC conditions and reflects the device's ability to minimize standby power loss in battery-critical applications such as wearables and remote sensors.
SZBZX84B9V1LT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZBZX84BxxxLT1G
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 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)
SZBZX84B9V1LT1G FAQ
1.How can I place an order for SZBZX84B9V1LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84B9V1LT1G 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 SZBZX84B9V1LT1G reliable?
The price and inventory of SZBZX84B9V1LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84B9V1LT1G is usually 5 days.
3.What payment methods are accepted for SZBZX84B9V1LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84B9V1LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84B9V1LT1G?
SZBZX84B9V1LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84B9V1LT1G 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 SZBZX84B9V1LT1G?
For technical support, including SZBZX84B9V1LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84B9V1LT1G requirements.
6.How does Aetrix verify that SZBZX84B9V1LT1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84B9V1LT1G 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 SZBZX84B9V1LT1G meets industry standards.
7.What is the process for return or replacement of SZBZX84B9V1LT1G?
All SZBZX84B9V1LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84B9V1LT1G, 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 SZBZX84B9V1LT1G part is unused and in its original packaging.
Return procedure for SZBZX84B9V1LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84B9V1LT1G Tags
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