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Vishay General Semiconductor - Diodes Division BZG04-39TR
- Part No.:
- BZG04-39TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
BZG04-39TR.pdf
- Description:
- TVS DIODE 39VWM 65.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,548
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Product details
Overview
BZG04-39TR from Vishay Semiconductors is a glass-passivated, surface-mount Zener diode optimized for transient voltage suppression in high-energy surge environments. It features a nominal Zener breakdown voltage of 44 V at 10 mA, clamping voltage of 65.5 V at 4.6 A (10/1000 µs pulse), 300 W non-repetitive peak surge power rating, and DO-214AC (SMC) package. It is used in DC power rail protection for industrial motor drives.
For engineers reviewing the BZG04-39TR datasheet, BZG04-39TR pinout, BZG04-39TR application, or BZG04-39TR equivalent, key selection criteria include verified clamping performance under 10/1000 µs transients, thermal resistance to ambient (125 K/W on epoxy-glass hard tissue), junction temperature limit (150 °C), and RoHS-compliant lead-free construction.
Technical Context
The BZG04-39TR operates as a unidirectional voltage-clamping device with fast response time (≤1 ps rise from 0 to VZmin) and low junction capacitance (370 pF at 0 V). Its glass-passivated junction ensures stable Zener characteristics and high reliability under repeated surge stress.
Designed for mounting on epoxy-glass PCB substrates per Figure 1b, it delivers RthJA = 125 K/W and supports peak forward surge current up to 50 A (10 ms half-sine). The device maintains specified clamping behavior across its operating junction temperature range (–65 °C to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 44 V min / 44 V typ @ IZT = 10 mA - defines precise DC clamping threshold |
| Clamping Voltage (VCL) | 65.5 V max @ IPP = 4.6 A, 10/1000 µs - limits peak transient voltage seen by protected circuitry |
| Peak Surge Power (PZSM) | 300 W @ tp = 10/1000 µs - enables robust handling of IEC 61000-4-5 Level 4 surges |
| Junction Capacitance (Cj) | 370 pF @ VR = 0 V, f = 1 MHz - low enough to avoid signal integrity degradation in <10 MHz analog/power lines |
| Thermal Resistance (RthJA) | 125 K/W mounted on epoxy-glass hard tissue (Fig. 1b) - determines safe power derating at elevated board temperatures |
| Surge Current (IFSM) | 50 A @ 10 ms half-sine - supports protection against lightning-induced AC line surges |
Pinout & Package
Package: DO-214AC (SMC), surface-mount, molded plastic case with glass-passivated chip. Approximate weight: 77 mg. Standard tape-and-reel packaging: TR = 1.5 k per 7" reel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked band) | High-impedance reference node during reverse bias | Connected to protected line; conducts only when transient exceeds VZ |
| Anode | Return path to ground or low-impedance reference | Must be routed with minimal inductance to maintain clamping effectiveness |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of Zener voltage and leakage current under thermal cycling and humidity stress |
| Fast response time ≤1 ps | Enables clamping before transient energy couples into sensitive downstream ICs |
| RoHS-compliant, lead-free | Meets EU Directive 2002/95/EC and WEEE 2002/96/EC; suitable for global industrial manufacturing |
| DO-214AC (SMC) package | Provides 3 W continuous power dissipation capability and mechanical robustness for automated SMT assembly |
Applications
| Industrial Motor Drive Protection | DC Power Supply Input Clamping |
|---|---|
Use Scenario: Suppresses switching transients and back-EMF spikes generated by IGBTs in 3-phase inverter stages. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed across DC bus rails. Use Value: Limits bus overvoltage to ≤65.5 V during 4.6 A surges, preventing gate driver latch-up and capacitor overvoltage failure. |
Use Scenario: Protects input stage of 48 V telecom rectifiers against induced lightning surges on distribution lines. IC Role / Device Role / Timing Role: Primary clamping element in Class III (line-to-ground) surge protection network. Use Value: Absorbs 300 W peak surge energy without degradation, maintaining system uptime per IEC 61000-4-5 Ed.3 compliance. |
| Programmable Logic Controller (PLC) I/O Protection | Renewable Energy Inverter DC Link |
Use Scenario: Shields 24 V digital input circuits from field-wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Standoff protector with 39 V nominal rating, placed before optocoupler input. Use Value: Blocks >44 V transients while presenting only 370 pF capacitance-no signal delay or edge distortion on 10 kHz control signals. |
Use Scenario: Clamps voltage overshoot during rapid DC link current interruption in solar string inverters. IC Role / Device Role / Timing Role: Secondary overvoltage clamp parallel to main DC link capacitor bank. Use Value: Activates within 1 ps to cap transient to 65.5 V, reducing stress on 100 V-rated electrolytic capacitors and extending service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener-based transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | 36 V standoff, 58.1 V clamping @ 6.4 A, DO-214AA (SMB) package, 600 W PZSM | Higher clamping voltage margin but lower surge rating per unit area; requires larger PCB footprint | Preferred where higher surge energy absorption is needed and board space allows SMB footprint |
| P6SMB39A | 39 V standoff, 60.7 V clamping @ 4.9 A, DO-214AA (SMB) package, 600 W PZSM | Same nominal voltage but 5.2 V higher clamping than BZG04-39TR; 13% lower clamping efficiency | Acceptable where tighter clamping is not critical and SMB package compatibility simplifies sourcing |
Compared with SMBJ36A and P6SMB39A, the BZG04-39TR offers superior clamping ratio (65.5 V / 44 V = 1.49) and smaller DO-214AC footprint, enabling higher power density in space-constrained industrial controls-without sacrificing surge endurance or thermal derating capability.
Availability
BZG04-39TR is available at Aetrix Electronics and suitable for industrial motor drives, DC power supply input clamping, and PLC I/O protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for BZG04-39TR 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
Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability passive and active components for industrial, automotive, and computing applications.
The BZG04-Series was developed specifically for high-energy transient suppression in harsh industrial environments, emphasizing stable Zener voltage, low clamping overshoot, and robust surge survivability in surface-mount form factors.
FAQ
What is the maximum clamping voltage of the BZG04-39TR under standard surge conditions?
The BZG04-39TR has a maximum clamping voltage of 65.5 V when subjected to a 10/1000 µs surge pulse at 4.6 A peak current. This value is measured per the test condition defined in Vishay's Document Number 85594 Rev. 2.2 and represents the upper bound of voltage seen by protected circuitry during transient events. The BZG04-39TR maintains this clamping performance across its rated junction temperature range.
Is the BZG04-39TR compatible with lead-free reflow soldering processes?
Yes, the BZG04-39TR is fully compatible with standard lead-free reflow profiles, including JEDEC J-STD-020D-compliant peak temperatures up to 260 °C. Its glass-passivated junction and DO-214AC package are qualified for multiple reflow cycles without parameter shift or bond integrity loss. The BZG04-39TR meets RoHS 2002/95/EC requirements and contains no intentionally added lead.
How does the thermal resistance of the BZG04-39TR vary with PCB layout?
The BZG04-39TR's junction-to-ambient thermal resistance (RthJA) is 125 K/W when mounted on epoxy-glass hard tissue per Figure 1b of the datasheet. With Al2O3 ceramic substrate, RthJA improves to 100 K/W. Layout changes-such as copper pour area, trace width, and via count beneath the cathode/anode pads-directly impact actual RthJA. The BZG04-39TR must be evaluated in final board configuration to ensure thermal limits remain within 150 °C junction temperature.
Can the BZG04-39TR be used for bidirectional transient suppression?
No, the BZG04-39TR is a unidirectional Zener diode and provides clamping only in reverse bias. For bidirectional protection (e.g., AC line or data line applications), two BZG04-39TR devices must be connected in series opposition, or a dedicated bidirectional TVS like SMAJ33A should be selected. Using a single BZG04-39TR in AC configurations risks forward conduction and failure during positive half-cycles.
What is the leakage current specification for the BZG04-39TR at its rated standoff voltage?
At VR = 39 V (standoff voltage), the BZG04-39TR exhibits a maximum reverse leakage current (IR) of 5 µA, tested at TA = 25 °C. This low leakage ensures minimal power loss in standby operation and avoids false triggering in high-impedance sensing circuits. The BZG04-39TR maintains this specification across its storage temperature range of –65 °C to +150 °C.
BZG04-39TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- BZG04
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 39V
- Voltage - Breakdown (Min):
- 44V
- Voltage - Clamping (Max) @ Ipp:
- 65.5V
- Current - Peak Pulse (10/1000µs):
- 4.6A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 370pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
BZG04-39TR FAQ
1.How can I place an order for BZG04-39TR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZG04-39TR 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 BZG04-39TR reliable?
The price and inventory of BZG04-39TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZG04-39TR is usually 5 days.
3.What payment methods are accepted for BZG04-39TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZG04-39TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZG04-39TR?
BZG04-39TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZG04-39TR 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 BZG04-39TR?
For technical support, including BZG04-39TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZG04-39TR requirements.
6.How does Aetrix verify that BZG04-39TR is sourced from the original manufacturer or authorized distributors?
All BZG04-39TR 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 BZG04-39TR meets industry standards.
7.What is the process for return or replacement of BZG04-39TR?
All BZG04-39TR units undergo pre-shipment inspection (PSI). If there is an issue with BZG04-39TR, 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 BZG04-39TR part is unused and in its original packaging.
Return procedure for BZG04-39TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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