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NXP Semiconductors BZX84-C9V1/LF1R
- Part No.:
- BZX84-C9V1/LF1R
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C9V1/LF1R.pdf
- Description:
- DIODE ZENER 9.1V 250MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:8,786
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Product details
Overview
BZX84-C9V1/LF1R from NXP Semiconductors is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 9.1 V nominal breakdown voltage at 5 mA, 250 mW total power dissipation, and AEC-Q101 qualified for automotive use. It provides stable reference voltage in low-power supply regulation and overvoltage protection circuits.
For engineers reviewing the BZX84-C9V1/LF1R datasheet, BZX84-C9V1/LF1R pinout, BZX84-C9V1/LF1R application, or BZX84-C9V1/LF1R equivalent, key selection factors include its 9.1 V Zener voltage with ±5 % tolerance, 3.0 A non-repetitive peak reverse current, 150 °C maximum junction temperature, and SOT23 surface-mount compatibility with standard FR4 PCB layouts.
Technical Context
This discrete Zener diode operates in reverse-bias breakdown mode to maintain a stable reference voltage across its cathode-anode terminals. Its performance is specified at Tj = 25 °C with defined test conditions: IZ = 5 mA for VZ, IF = 10 mA for forward voltage, and pulse duration ≤100 μs for peak power ratings.
The device exhibits a positive temperature coefficient of +3.8 mV/K at IZ = 5 mA, differential resistance of 40 Ω (typ), and reverse current ≤0.5 μA at VR = 7.3 V - enabling predictable thermal drift and low leakage in precision biasing applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal at IZ = 5 mA; ±5 % tolerance band (8.5 V to 9.6 V) defines usable regulation window |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤25 °C; derates linearly above ambient, limiting continuous DC load current to ~27 mA at 9.1 V |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA; ensures low conduction loss when used in polarity-sensitive clamp configurations |
| Non-repetitive Peak Reverse Current (IZSM) | 3.0 A at tp ≤100 μs; supports transient surge suppression in ESD/overvoltage events without failure |
| Reverse Current (IR) | ≤0.5 μA at VR = 7.3 V; guarantees minimal standby leakage in battery-powered or high-impedance reference nodes |
| Temperature Coefficient (SZ) | +3.8 mV/K at IZ = 5 mA; enables predictable voltage drift compensation in temperature-stable designs |
| Junction Temperature Range | −65 °C to +150 °C; validated for under-hood automotive environments and industrial control enclosures |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; 2.8 mm × 1.4 mm footprint, 1.1 mm height, tin-plated terminations compatible with reflow and wave soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode connection | Connected to lower-potential node in reverse-bias operation; must be held at voltage ≤ VZ − 0.9 V during forward conduction |
| 2 (n.c.) | Not connected | Internal die bond wire stub; electrically isolated and thermally inert - no PCB trace or thermal pad required |
| 3 (Cathode) | Cathode connection | Connected to higher-potential node; carries full Zener current and dissipates heat via solder joint to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, and ESD testing - suitable for engine control, body electronics, and ADAS subsystems |
| ±5 % Zener tolerance (BZX84-C series) | Cost-optimized regulation accuracy for non-critical biasing and clamping where tight voltage stability is not required |
| Low differential resistance (40 Ω typ) | Minimizes output voltage variation under changing load current - improves regulation linearity in feedback networks |
| 150 °C max junction temperature | Enables operation in high-ambient environments without derating in compact layouts with limited airflow |
| SOT23 footprint compatibility | Matches industry-standard 0.95 mm pitch, 2.8 mm × 1.4 mm land pattern - supports automated placement and reflow profiling |
Applications
| Power Supply Voltage Reference | Overvoltage Clamp Circuit |
|---|---|
|
Use Scenario: Providing stable 9.1 V reference for op-amp comparators in 12 V automotive auxiliary rails. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference node voltage independent of input ripple. Use Value: Delivers ±5 % regulation accuracy with <0.5 μA leakage at 7.3 V reverse bias, minimizing quiescent current draw in always-on modules. |
Use Scenario: Protecting microcontroller I/O pins from 24 V transients in industrial PLC input modules. IC Role / Device Role / Timing Role: Shunt clamping device that conducts only when voltage exceeds 9.1 V, diverting surge energy to ground. Use Value: Withstands 3.0 A non-repetitive peak reverse current for 100 μs, absorbing up to 40 W surge power without degradation. |
| Temperature-Stable Bias Network | Low-Power Sensor Excitation |
|
Use Scenario: Generating a compensated bias voltage for RTD or thermistor measurement bridges in HVAC controllers. IC Role / Device Role / Timing Role: Zener reference with +3.8 mV/K temperature coefficient used in conjunction with NTC thermistors for drift cancellation. Use Value: Predictable thermal drift enables first-order compensation without active circuitry, reducing BOM count and power consumption. |
Use Scenario: Supplying excitation current to analog pressure sensors in portable medical devices powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-leakage (≤0.5 μA) voltage reference establishing precise 9.1 V rail for constant-current source design. Use Value: Enables >10-year battery life by limiting reference node current to sub-microamp levels while maintaining regulation integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5240BLT1G | 9.1 V nominal, ±5 %, 225 mW Ptot, SOT23 package, 300 mW peak pulse rating | Lower power rating limits continuous current handling; suitable for signal-level clamping but not sustained regulation loads | Select when lower cost and broad distributor availability outweigh need for 250 mW continuous dissipation |
| Vishay BZX84-C9V1-TP | 9.1 V nominal, ±5 %, 300 mW Ptot, SOT23, AEC-Q101 qualified, 3.5 A IZSM | Higher power rating and peak current support broader surge margin; identical pinout and marking code Z8* | Preferred for new designs requiring extended thermal headroom or higher transient immunity in automotive systems |
Compared with MMBZ5240BLT1G, BZX84-C9V1/LF1R offers 11 % higher continuous power handling and AEC-Q101 validation; versus BZX84-C9V1-TP, it trades 50 mW Ptot and 0.5 A IZSM for NXP's long-term supply commitment and legacy design continuity.
Availability
BZX84-C9V1/LF1R is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer power management systems requiring stable component supply and AEC-Q101 compliance.
Supply support for BZX84-C9V1/LF1R 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The BZX84 series was designed as a cost-effective, AEC-Q101 qualified family of low-power Zener diodes targeting voltage reference, clamping, and biasing functions in space-constrained automotive and industrial PCBs.
FAQ
What is the Zener voltage tolerance of BZX84-C9V1/LF1R?
The BZX84-C9V1/LF1R has a nominal Zener voltage of 9.1 V with an approximate ±5 % tolerance, meaning its actual breakdown voltage falls between 8.5 V and 9.6 V when tested at IZ = 5 mA. This tolerance aligns with the "C" grade of the BZX84 series and is confirmed in Table 8 of the NXP datasheet Rev. 6.
Is BZX84-C9V1/LF1R suitable for automotive applications?
Yes, BZX84-C9V1/LF1R is AEC-Q101 qualified per Section 8.1 of the NXP datasheet, having passed stress tests for high-temperature operating life, temperature cycling, and ESD robustness. It is explicitly approved for use in automotive electronics including body control modules and infotainment power supplies.
What is the maximum non-repetitive peak reverse current for BZX84-C9V1/LF1R?
The BZX84-C9V1/LF1R supports a non-repetitive peak reverse current (IZSM) of 3.0 A under pulse conditions of tp ≤100 μs and Tj = 25 °C before surge, as specified in Table 5 (Limiting Values) and Table 8 (Characteristics) of the NXP datasheet.
Does BZX84-C9V1/LF1R have a not-connected pin, and how should it be handled on the PCB?
Yes, Pin 2 of BZX84-C9V1/LF1R is marked "n.c." (not connected) per Table 2 (Pinning). It is an internal bond wire stub with no electrical function. No PCB trace, thermal pad, or solder mask opening is required - standard SOT23 footprint layout applies without modification.
What is the thermal resistance from junction to ambient for BZX84-C9V1/LF1R?
The thermal resistance from junction to ambient (Rth(j-a)) for BZX84-C9V1/LF1R is 500 K/W when mounted on a FR4 PCB with single-sided copper, tin-plated, and standard footprint per Table 6. This value assumes free-air convection and guides thermal derating above 25 °C ambient.
BZX84-C9V1/LF1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- 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:
- ±5%
- 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
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23 (TO-236AB)
BZX84-C9V1/LF1R FAQ
1.How can I place an order for BZX84-C9V1/LF1R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C9V1/LF1R 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 BZX84-C9V1/LF1R reliable?
The price and inventory of BZX84-C9V1/LF1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C9V1/LF1R is usually 5 days.
3.What payment methods are accepted for BZX84-C9V1/LF1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C9V1/LF1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C9V1/LF1R?
BZX84-C9V1/LF1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C9V1/LF1R 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 BZX84-C9V1/LF1R?
For technical support, including BZX84-C9V1/LF1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C9V1/LF1R requirements.
6.How does Aetrix verify that BZX84-C9V1/LF1R is sourced from the original manufacturer or authorized distributors?
All BZX84-C9V1/LF1R 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 BZX84-C9V1/LF1R meets industry standards.
7.What is the process for return or replacement of BZX84-C9V1/LF1R?
All BZX84-C9V1/LF1R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C9V1/LF1R, 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 BZX84-C9V1/LF1R part is unused and in its original packaging.
Return procedure for BZX84-C9V1/LF1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C9V1/LF1R Tags
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