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Nexperia USA Inc. BZV49-C39,115
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- Part No.:
- BZV49-C39,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-243AA
- Datasheet:
-
BZV49-C39,115.pdf
- Description:
- DIODE ZENER 39V 1W SOT89
- Quantity:
- Payment:
- Shipping:
Inventory:2,013
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Product details
Overview
BZV49-C39,115 from Nexperia is a medium-power Zener voltage regulator diode in SOT89 package, designed for precision DC voltage reference and stabilization in power supply rails. It delivers a nominal working voltage of 39 V at 2 mA test current, with ±5% tolerance, 40 Ω typical differential resistance, and −0.7 mV/K temperature coefficient - enabling stable regulation in industrial power converters and automotive sensor biasing circuits.
For engineers reviewing the BZV49-C39,115 datasheet, BZV49-C39,115 pinout, BZV49-C39,115 application, or BZV49-C39,115 equivalent, key selection criteria include Zener voltage accuracy at 2 mA, thermal resistance (15 K/W junction-to-tie-point), non-repetitive peak reverse power (40 W), and SOT89 thermal pad compatibility with PCB copper pour.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain a stable reference voltage across its cathode-anode terminals under varying load and temperature conditions. Its 39 V nominal Zener voltage is specified at IZtest = 2 mA, with differential resistance of 40 Ω (typ.) and temperature coefficient of −0.7 mV/K - indicating slight negative drift over temperature.
The device uses silicon planar technology in a 3-lead SOT89 surface-mount package with an exposed collector pad for enhanced thermal conduction. It supports continuous forward current up to 250 mA and withstands non-repetitive peak reverse surges of 40 W for 100 μs, making it suitable for transient-suppressed regulation in DC/DC feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 37.0–41.0 V at IZ = 2 mA - defines regulated output range for feedback or reference use |
| Differential Resistance rdif | 40 Ω (max) at IZ = 2 mA - determines output impedance and load regulation error |
| Temperature Coefficient SZ | −0.7 mV/K (typ) - quantifies voltage drift per °C, critical for wide-temperature designs |
| Total Power Dissipation Ptot | 1 W at Tamb = 25 °C on ceramic substrate - sets maximum steady-state thermal budget |
| Non-repetitive Peak Power PZSM | 40 W for tp = 100 μs - enables surge handling in transient-limited protection circuits |
| Reverse Current IR | ≤0.05 μA at VR = 29.4 V - ensures low leakage in high-impedance bias networks |
| Junction-to-Tie-Point Rth(j-tp) | 15 K/W - allows direct thermal coupling to PCB copper for improved power derating |
Pinout & Package
Package: SOT89 (SC-62), plastic surface-mounted with exposed thermal pad (pin 3). Designed for high thermal efficiency via PCB copper pour attachment to the collector pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry point; connected to ground or lower-potential node in reverse-biased Zener configuration |
| 2 | Cathode | Regulated output node; connects to feedback divider or load requiring stabilized 39 V reference |
| 3 | Anode (thermal pad) | Electrically tied to pin 1; provides primary thermal path to PCB copper for power dissipation management |
Key Features
| Feature | Design Value |
|---|---|
| E24 ±5% voltage tolerance series | Ensures interchangeability within standard resistor/Zener value grid without custom calibration |
| 1 W total power rating with 15 K/W Rth(j-tp) | Supports 667 mW continuous dissipation at 100 °C ambient when mounted on ≥2.5 cm² copper |
| Low 0.05 μA reverse leakage at 29.4 V | Minimizes error in high-impedance voltage dividers used in precision feedback loops |
| 40 W non-repetitive surge capability | Withstands brief overvoltage transients in automotive load-dump or inductive-switching environments |
Applications
| Industrial Power Supply Feedback | Automotive Sensor Biasing |
|---|---|
Use Scenario: Regulating feedback voltage in isolated flyback or forward converter secondary-side TL431 replacement circuits. IC Role / Device Role / Timing Role: Zener reference element providing stable 39 V threshold to control optocoupler LED current and thus primary-side duty cycle. Use Value: Enables accurate output voltage regulation (±1.5%) over −40 to +125 °C without trimming, leveraging −0.7 mV/K tempco and 40 Ω dynamic impedance. | Use Scenario: Providing stable bias voltage to analog pressure or temperature sensors in engine control units. IC Role / Device Role / Timing Role: Precision shunt reference maintaining constant excitation voltage despite battery fluctuations (9–16 V). Use Value: Delivers <0.05 μA leakage at 29.4 V, preserving sensor signal integrity in microamp-level bridge circuits. |
| Programmable Overvoltage Protection | DC Link Voltage Clamping |
Use Scenario: Triggering crowbar or shutdown circuitry when DC bus exceeds safe threshold in motor drives. IC Role / Device Role / Timing Role: Zener-based comparator input reference set to 39 V to detect overvoltage events. Use Value: Fast response (<100 ns) to surges due to low capacitance (45 pF) and 40 W pulse rating enables reliable fault detection before MOSFET failure. | Use Scenario: Clamping transient spikes on 36–42 V DC link rails in telecom rectifiers or solar charge controllers. IC Role / Device Role / Timing Role: Shunt clamp absorbing energy during inductive kickback or lightning-induced surges. Use Value: 40 W non-repetitive peak power rating allows absorption of 4 mJ pulses (40 W × 100 μs), protecting downstream capacitors and ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4704T1G | 39 V, SOD-123, 500 mW, 90 Ω rdif, −0.7 mV/K, 3-pin not applicable | Lower power rating and higher impedance limit use in high-current or precision feedback roles | Select only for space-constrained, low-power biasing where thermal pad is unnecessary |
| BZX84-C39 | 39 V, SOT23, 350 mW, 90 Ω rdif, −0.7 mV/K, no thermal pad | Lacks thermal pad and power headroom; unsuitable for >300 mW continuous operation | Prefer only for cost-sensitive, low-duty-cycle reference applications with minimal thermal stress |
Compared with MMSZ4704T1G and BZX84-C39, the BZV49-C39,115 offers 1 W power handling, 40 Ω dynamic impedance, and a dedicated thermal pad - making it uniquely suited for industrial and automotive regulation where sustained power and thermal stability are mandatory.
Availability
BZV49-C39,115 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, programmable protection circuits, and DC link clamping requiring stable component supply and long-term lifecycle support.
Supply support for BZV49-C39,115 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
Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, computing, and consumer markets.
The BZV49 series belongs to Nexperia's voltage regulator diode product line, engineered for medium-power, high-stability DC voltage reference and clamping in harsh-environment applications demanding robust thermal performance and tight voltage tolerance.
FAQ
What is the maximum continuous power dissipation for BZV49-C39,115?
The BZV49-C39,115 has a total power dissipation rating of 1 W at Tamb = 25 °C when mounted on a 2.5 cm² ceramic substrate. Derating is required above 25 °C at 8 mW/°C, based on a thermal resistance of 125 K/W junction-to-ambient. For higher ambient temperatures, the thermal pad (pin 3) must be soldered to PCB copper to leverage the lower 15 K/W junction-to-tie-point path.
Does BZV49-C39,115 have a built-in thermal pad, and how should it be used?
Yes - pin 3 is an exposed anode thermal pad integral to the SOT89 package. It must be soldered to a minimum 2.5 cm² copper area on the PCB to achieve the rated 1 W power dissipation and 15 K/W junction-to-tie-point thermal resistance. Leaving it unconnected reduces effective power handling to ~300 mW and increases thermal resistance significantly.
What is the Zener test current and why is it important for regulation accuracy?
The Zener voltage is specified at IZtest = 2 mA. Operating significantly above or below this current increases differential resistance error and temperature coefficient deviation. For best accuracy, design the bias network to maintain 1–5 mA through the diode - ensuring stable 39 V regulation while minimizing drift and impedance-induced load error.
Can BZV49-C39,115 replace BZX84-C39 in existing designs?
No - although both regulate at 39 V, BZV49-C39,115 is a 3-lead SOT89 device with thermal pad and 1 W rating, whereas BZX84-C39 is a 3-lead SOT23 with no thermal pad and only 350 mW rating. Direct replacement requires PCB layout revision, thermal pad routing, and verification of power/impedance requirements; it is not a drop-in substitute.
BZV49-C39,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 130 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 50 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
BZV49-C39,115 FAQ
1.How can I place an order for BZV49-C39,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZV49-C39,115 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 BZV49-C39,115 reliable?
The price and inventory of BZV49-C39,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZV49-C39,115 is usually 5 days.
3.What payment methods are accepted for BZV49-C39,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZV49-C39,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZV49-C39,115?
BZV49-C39,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZV49-C39,115 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 BZV49-C39,115?
For technical support, including BZV49-C39,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZV49-C39,115 requirements.
6.How does Aetrix verify that BZV49-C39,115 is sourced from the original manufacturer or authorized distributors?
All BZV49-C39,115 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 BZV49-C39,115 meets industry standards.
7.What is the process for return or replacement of BZV49-C39,115?
All BZV49-C39,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZV49-C39,115, 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 BZV49-C39,115 part is unused and in its original packaging.
Return procedure for BZV49-C39,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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