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NXP Semiconductors BZX84-C39/LF1VL
- Part No.:
- BZX84-C39/LF1VL
- Manufacturer:
- NXP Semiconductors
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C39/LF1VL.pdf
- Description:
- DIODE ZENER 39V 250MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,356
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Product details
Overview
BZX84-C39/LF1VL from NXP Semiconductors is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 39 V nominal breakdown voltage at 2 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-C39/LF1VL datasheet, BZX84-C39/LF1VL pinout, BZX84-C39/LF1VL application, or BZX84-C39/LF1VL equivalent, key selection criteria include its 39 V Zener voltage tolerance (±5 %), differential resistance of 80 Ω at 2 mA, reverse current ≤40 μA at 31.2 V, temperature coefficient of +0.05 mV/K, and non-repetitive peak reverse current capability of 0.7 A.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining a stable reverse-biased breakdown voltage across its cathode-anode terminals under controlled current conditions. Its Zener mechanism delivers predictable clamping behavior with a typical differential resistance of 80 Ω and reverse leakage current ≤40 μA at VR = 31.2 V.
Designed for surface-mount implementation on FR4 PCBs with single-sided copper, it supports reflow and wave soldering per JEDEC standards. Thermal resistance from junction to ambient is 500 K/W in free air, and it is qualified to AEC-Q101 for automotive-grade reliability across −65 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 37.0 V to 41.0 V at IZ = 2 mA - defines regulated output voltage range under nominal bias |
| Tolerance | ±5 % - sets maximum allowable deviation from nominal 39 V for production yield and circuit margining |
| Differential Resistance (rdif) | 80 Ω max at IZ = 2 mA - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | ≤40 μA at VR = 31.2 V - specifies leakage level below breakdown, critical for low-power standby operation |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤25 °C - limits continuous DC power handling without derating |
| Non-repetitive Peak Reverse Current (IZSM) | 0.7 A for tp ≤100 μs - enables transient overvoltage suppression in surge events |
| Temperature Coefficient (SZ) | +0.05 mV/K - indicates minimal positive drift with temperature, supporting stable reference in varying environments |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; 1.9 mm × 1.1 mm footprint, 1.4 mm height, and standard 4 mm tape-and-reel packaging (3000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward conduction terminal; connects to lower-potential side in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; no electrical function - must remain floating or grounded per layout best practice |
| 3 | Cathode (K) | Reverse-bias terminal; connects to higher-potential side and serves as regulated output node |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring high reliability |
| ±5 % Zener voltage tolerance | Enables cost-effective regulation where tight voltage accuracy is not required, balancing precision and manufacturing yield |
| 250 mW power rating | Supports compact, low-heat-generation designs in space-constrained consumer and industrial PCBs |
| SOT23 package compatibility | Ensures drop-in replacement capability with industry-standard pick-and-place equipment and reflow profiles |
| Non-repetitive 40 W peak power handling | Provides robust transient suppression against ESD and inductive switching spikes without external components |
Applications
| Automotive Body Control Module (BCM) Voltage Clamp | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamps 12 V supply rail transients during load dump or alternator ripple in BCM microcontroller power domains. IC Role / Device Role / Timing Role: Shunt regulator providing passive overvoltage protection by conducting excess current above 39 V threshold. Use Value: Prevents MCU reset or latch-up without active supervision, leveraging AEC-Q101 qualification and 0.7 A surge current capability. | Use Scenario: Stabilizes excitation voltage for bridge-based pressure sensors operating from 3.3 V or 5 V rails. IC Role / Device Role / Timing Role: Precision reference source for analog front-end biasing, using tight 39 V Zener voltage to calibrate sensor gain stages. Use Value: Delivers <1 % long-term stability via low 80 Ω dynamic impedance and +0.05 mV/K temperature coefficient. |
| Consumer Power Adapter Feedback Network | Telecom Line Interface Overvoltage Protection |
Use Scenario: Sets feedback threshold in secondary-side TL431-based SMPS controllers for 5 V/12 V adapters. IC Role / Device Role / Timing Role: Zener reference element establishing error amplifier trip point in isolated flyback feedback loops. Use Value: Enables accurate output regulation with ±5 % tolerance matching common adapter spec requirements while minimizing BOM count. | Use Scenario: Protects PHY IC inputs from lightning-induced surges on RS-485 or Ethernet PHY lines. IC Role / Device Role / Timing Role: Standby-mode clamp diode absorbing fast-rising transients before TVS activation. Use Value: Extends system-level surge immunity with 40 W non-repetitive peak power dissipation and 31.2 V reverse standoff voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5242BS-7-F | 39 V nominal, ±5 %, SOT23, 200 mW Ptot, 100 Ω rdif at 20 mA | Higher test current (20 mA vs. 2 mA) yields different dynamic impedance profile; lower power rating reduces thermal margin | Select when lower-cost sourcing is prioritized and 200 mW dissipation suffices for target thermal environment |
| Vishay BZX84-C39-TP | 39 V nominal, ±5 %, SOT23, 300 mW Ptot, 80 Ω rdif at 2 mA, AEC-Q101 qualified | Higher power rating allows extended DC operation; identical Zener parameters and automotive qualification | Prefer for thermally demanding layouts or where 300 mW headroom improves long-term reliability |
Compared with MMBZ5242BS-7-F, BZX84-C39/LF1VL offers superior thermal margin (250 mW vs. 200 mW) and tighter dynamic impedance matching at low bias current; versus BZX84-C39-TP, it trades 50 mW power headroom for NXP's established automotive supply chain traceability and legacy design support.
Availability
BZX84-C39/LF1VL is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer power adapters, and telecom line protection requiring stable component supply with AEC-Q101 compliance and SOT23 footprint consistency.
Supply support for BZX84-C39/LF1VL 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 is part of NXP's broad portfolio of discrete protection and regulation devices, engineered specifically for cost-sensitive, high-volume applications requiring AEC-Q101 reliability and standardized SMT packaging.
FAQ
What is the nominal Zener voltage and tolerance of BZX84-C39/LF1VL?
The BZX84-C39/LF1VL has a nominal Zener voltage of 39 V with a tolerance of ±5 %, meaning its actual breakdown voltage falls between 37.0 V and 41.0 V when tested at 2 mA. This tolerance band is confirmed in Table 9 of the NXP datasheet and reflects the "C" grade within the BZX84 family. The BZX84-C39/LF1VL maintains this specification under standard test conditions of Tj = 25 °C.
Is BZX84-C39/LF1VL suitable for automotive applications?
Yes, BZX84-C39/LF1VL is AEC-Q101 qualified, as explicitly stated in Section 8.1 of the NXP product data sheet. This qualification confirms its suitability for automotive applications including body control modules, infotainment power supplies, and sensor interfaces. The BZX84-C39/LF1VL meets stress test requirements for temperature cycling, humidity, and mechanical shock, ensuring reliability in vehicle environments ranging from −40 °C to +125 °C ambient.
What is the maximum continuous power dissipation for BZX84-C39/LF1VL?
The BZX84-C39/LF1VL has a maximum total power dissipation (Ptot) of 250 mW at ambient temperatures ≤25 °C, as specified in Table 5 (Limiting Values) and Table 1 (Quick Reference Data). Derating is required above 25 °C, following the thermal resistance Rth(j-a) of 500 K/W. The BZX84-C39/LF1VL must be operated within this limit to avoid junction temperature exceedance and ensure long-term parametric stability.
How does the differential resistance of BZX84-C39/LF1VL affect regulation performance?
The BZX84-C39/LF1VL exhibits a maximum differential resistance (rdif) of 80 Ω at IZ = 2 mA, per Table 9. This value directly impacts output voltage stability: for every 1 mA change in Zener current, the voltage shifts by up to 80 mV. Lower rdif improves load regulation and noise rejection. The BZX84-C39/LF1VL's 80 Ω rating makes it suitable for moderate-precision applications where active regulation is unnecessary but passive clamping must remain predictable.
What are the pin functions and physical package of BZX84-C39/LF1VL?
The BZX84-C39/LF1VL uses a SOT23 (TO-236AB) package with three terminals: Pin 1 is Anode (A), Pin 2 is Not Connected (n.c.), and Pin 3 is Cathode (K), as defined in Table 2 (Pinning). The package measures 1.9 mm × 1.1 mm with 0.9 mm lead pitch and is optimized for automated assembly. The BZX84-C39/LF1VL's n.c. pin requires no connection and must remain unbonded in PCB layout to prevent parasitic coupling or thermal path disruption.
BZX84-C39/LF1VL 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):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 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-C39/LF1VL FAQ
1.How can I place an order for BZX84-C39/LF1VL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C39/LF1VL 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-C39/LF1VL reliable?
The price and inventory of BZX84-C39/LF1VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C39/LF1VL is usually 5 days.
3.What payment methods are accepted for BZX84-C39/LF1VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C39/LF1VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C39/LF1VL?
BZX84-C39/LF1VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C39/LF1VL 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-C39/LF1VL?
For technical support, including BZX84-C39/LF1VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C39/LF1VL requirements.
6.How does Aetrix verify that BZX84-C39/LF1VL is sourced from the original manufacturer or authorized distributors?
All BZX84-C39/LF1VL 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-C39/LF1VL meets industry standards.
7.What is the process for return or replacement of BZX84-C39/LF1VL?
All BZX84-C39/LF1VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C39/LF1VL, 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-C39/LF1VL part is unused and in its original packaging.
Return procedure for BZX84-C39/LF1VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C39/LF1VL Tags
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