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NXP Semiconductors BZX84-C24/LF1R
- Part No.:
- BZX84-C24/LF1R
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C24/LF1R.pdf
- Description:
- DIODE ZENER 24V 250MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,857
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Product details
Overview
BZX84-C24/LF1R from NXP Semiconductors is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 24 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-C24/LF1R datasheet, BZX84-C24/LF1R pinout, BZX84-C24/LF1R application, or BZX84-C24/LF1R equivalent, key selection criteria include its 22.8–25.6 V Zener voltage range, 55 Ω typical differential resistance at 5 mA, 0.05 μA reverse current at 19.2 V, −1.6 to +0.2 mV/K temperature coefficient, and SOT23-compatible thermal performance on FR4 PCBs.
Technical Context
This discrete Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its cathode-anode terminals. Its design centers on precise voltage regulation under varying load and temperature conditions, with thermal resistance from junction to ambient of 500 K/W in free air.
The device supports non-repetitive peak reverse power dissipation up to 40 W for ≤100 μs pulses and exhibits a diode capacitance of 55 pF at 1 MHz and 0 V reverse bias. It is characterized at Tj = 25 °C with specified limits for forward voltage (≤0.9 V at 10 mA), junction temperature (−65 to +150 °C), and storage temperature (−55 to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8 V to 25.6 V at IZ = 5 mA - defines usable regulation window under standard test condition |
| Differential Resistance (rdiff) | 60 Ω typ. at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | 0.05 μA max. at VR = 19.2 V - ensures low leakage in standby or high-impedance sensing nodes |
| Temperature Coefficient (SZ) | −1.6 to +0.2 mV/K - quantifies voltage drift per degree Celsius across operating range |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Non-repetitive Peak Reverse Power | 40 W for tp ≤ 100 μs - enables transient surge suppression without failure |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - confirms low conduction loss when used in forward-biased clamp configurations |
Pinout & Package
Package: SOT23 (TO-236AB), 3-lead surface-mounted plastic package with 2.8 mm × 1.4 mm footprint and 1.1 mm height. Mounting uses standard reflow or wave soldering per IPC-J-STD-020/001.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Anode connection | Terminal where conventional current enters during forward conduction; connected to lower-potential node in Zener regulation |
| 2 (n.c.) | Not connected | Internal die pad with no electrical bond; must remain unconnected in PCB layout to avoid parasitic coupling |
| 3 (Cathode) | Cathode connection | Terminal where conventional current exits during reverse breakdown; connected to higher-potential node for voltage reference |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per AEC standard |
| ±5 % Zener voltage tolerance | Supports cost-sensitive designs where tighter tolerances are unnecessary, reducing BOM cost vs. ±1 % or ±2 % variants |
| Low leakage current | 0.05 μA max. at 80 % of VZ enables use in battery-powered or ultra-low-power monitoring circuits |
| SOT23 footprint compatibility | Enables drop-in replacement in space-constrained layouts designed for industry-standard 3-lead SMD packages |
| 55 pF diode capacitance | Minimizes signal distortion in high-frequency clamping or AC-coupled reference applications up to ~3 MHz |
Applications
| Automotive Body Control Module (BCM) Voltage Clamp | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protects microcontroller I/O pins from load-dump transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Zener diode placed between sensor input line and ground to clamp voltage spikes above 24 V. Use Value: Limits transient voltage to ≤25.6 V while dissipating up to 40 W for 100 μs, preventing MCU damage without requiring active circuitry. | Use Scenario: Stabilizes excitation voltage for resistive bridge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Provides precision 24 V reference to bridge driver ICs via series resistor and local bypass capacitor. Use Value: Maintains regulation within ±5 % across −40 to +125 °C ambient, enabling <1 % full-scale error in 16-bit ADC measurements. |
| Consumer Power Adapter Overvoltage Protection | Medical Device Battery Monitoring Circuit |
Use Scenario: Guards secondary-side feedback path in isolated flyback converters against output overvoltage faults. IC Role / Device Role / Timing Role: Connected across optocoupler input to trigger shutdown when output exceeds safe threshold. Use Value: Responds within nanoseconds to overvoltage events, with 60 Ω dynamic impedance ensuring fast, predictable trip point at 24 V ±0.8 V. | Use Scenario: Monitors lithium-ion pack voltage during charging cycles using high-impedance divider network. IC Role / Device Role / Timing Role: Acts as shunt reference in voltage divider to set comparator threshold for end-of-charge detection. Use Value: Draws only 0.05 μA leakage at 19.2 V, extending standby battery life beyond 5 years in always-on monitoring applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5245BS | 24 V ±5 %, 350 mW Ptot, SOT23 package, but not AEC-Q101 qualified | Approved for industrial/commercial use only; unsuitable for automotive under hood environments | Select when automotive qualification is unnecessary and higher power margin is required |
| Vishay BZX84-C24-TP | Identical 24 V ±5 % spec, same SOT23 package, AEC-Q101 qualified, but marked with different date code and reel packaging | No functional difference; validated for identical automotive and industrial applications | Choose for dual-sourcing flexibility with identical electrical and reliability performance |
Compared with BZX84-C24/LF1R, MMBZ5245BS offers higher power rating but lacks automotive qualification, while BZX84-C24-TP delivers identical regulation performance and AEC-Q101 compliance with alternate logistics packaging-making it a direct second-source option.
Availability
BZX84-C24/LF1R is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for BZX84-C24/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 developed as a family of standardized, AEC-Q101 qualified Zener diodes targeting cost-effective voltage regulation and transient protection in space-constrained automotive and industrial control systems.
FAQ
What is the Zener voltage tolerance of BZX84-C24/LF1R?
The BZX84-C24/LF1R has a nominal Zener voltage of 24 V with a tolerance of approximately ±5 %, resulting in a guaranteed breakdown voltage range of 22.8 V to 25.6 V at 5 mA test current. This tolerance is defined per the BZX84-C series specification and confirmed in Table 8 of the NXP datasheet Rev. 6.
Is BZX84-C24/LF1R suitable for automotive applications?
Yes, BZX84-C24/LF1R is AEC-Q101 qualified per Section 8.1 of the NXP datasheet, confirming its suitability for automotive applications including engine control units, body control modules, and infotainment systems. The qualification covers stress tests for temperature cycling, humidity, and mechanical robustness required for under-hood and cabin environments.
What is the maximum forward current rating for BZX84-C24/LF1R?
The absolute maximum forward current for BZX84-C24/LF1R is 200 mA, as specified in Table 5 (Limiting Values) of the NXP datasheet. However, typical forward operation is limited to ≤10 mA for characterization (e.g., VF = 0.9 V max), and sustained forward conduction is not part of its intended Zener regulation function.
Does BZX84-C24/LF1R have a connected pin 2?
No, pin 2 of BZX84-C24/LF1R is explicitly marked "n.c." (not connected) in Table 2 (Pinning) of the NXP datasheet. It is an internal lead frame tab with no electrical bond to the die and must remain unconnected in PCB layout to prevent unintended coupling or thermal interference.
What is the thermal resistance from junction to ambient for BZX84-C24/LF1R?
The thermal resistance from junction to ambient (Rth(j-a)) for BZX84-C24/LF1R is 500 K/W in free air, as stated in Table 6 (Thermal characteristics) of the NXP datasheet. This value assumes mounting on a FR4 PCB with single-sided copper, tin-plated, and standard SOT23 footprint per the test condition.
BZX84-C24/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):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 16.8 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-C24/LF1R FAQ
1.How can I place an order for BZX84-C24/LF1R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C24/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-C24/LF1R reliable?
The price and inventory of BZX84-C24/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-C24/LF1R is usually 5 days.
3.What payment methods are accepted for BZX84-C24/LF1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C24/LF1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C24/LF1R?
BZX84-C24/LF1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C24/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-C24/LF1R?
For technical support, including BZX84-C24/LF1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C24/LF1R requirements.
6.How does Aetrix verify that BZX84-C24/LF1R is sourced from the original manufacturer or authorized distributors?
All BZX84-C24/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-C24/LF1R meets industry standards.
7.What is the process for return or replacement of BZX84-C24/LF1R?
All BZX84-C24/LF1R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C24/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-C24/LF1R part is unused and in its original packaging.
Return procedure for BZX84-C24/LF1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C24/LF1R Tags
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