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Vishay General Semiconductor - Diodes Division BZG04-47TR
- Part No.:
- BZG04-47TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
BZG04-47TR.pdf
- Description:
- TVS DIODE 47VWM 78.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,721
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Product details
Overview
BZG04-47TR from Vishay Semiconductors is a glass-passivated Zener diode designed for transient voltage suppression in power supply and signal line protection circuits. It features a 47 V standoff voltage, 52 V breakdown voltage at 10 mA, 78.6 V clamping voltage at 3.8 A peak pulse current, 300 W non-repetitive surge power rating, and DO-214AC (SMA) package for surface-mount reliability in industrial power rails.
For engineers reviewing the BZG04-47TR datasheet, BZG04-47TR pinout, BZG04-47TR application, or BZG04-47TR equivalent, key selection criteria include its 47 V nominal Zener voltage, 3.8 A IPP clamping capability, 300 W surge rating under 10/1000 µs waveform, thermal resistance of 100 K/W on Al2O3 substrate, and RoHS-compliant lead-free construction.
Technical Context
The BZG04-47TR operates as a unidirectional voltage-clamping device with fast response time (≤1 ps), leveraging glass-passivated junction technology to ensure stable Zener characteristics and high reliability under repetitive surge stress. Its thermal design supports operation up to 150 °C junction temperature with RthJA as low as 100 K/W when mounted on alumina ceramic.
Electrical behavior is defined by tight tolerances: VZ = 52 V (min) at IZT = 10 mA, VCL = 78.6 V (max) at IPP = 3.8 A, and low leakage (IR ≤ 5 µA at VR = 47 V), making it suitable for precision overvoltage protection where predictable clamping onset is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VR) | 47 V - Maximum reverse voltage before significant conduction; sets protection threshold for 48 V DC systems. |
| Breakdown Voltage (VBR) | 52 V min at 10 mA - Ensures reliable Zener turn-on above system operating voltage with margin. |
| Clamping Voltage (VCL) | 78.6 V max at 3.8 A - Limits transient voltage seen by downstream circuitry during 10/1000 µs surge events. |
| Surge Power Rating (PZSM) | 300 W - Supports high-energy transients without failure when pulse duration ≤ 10 ms. |
| Junction Temperature (Tj) | 150 °C - Enables use in thermally demanding environments such as automotive engine control units or industrial motor drives. |
| Package Type | DO-214AC (SMA) - Standard surface-mount outline with 77 mg mass and proven thermal/mechanical robustness. |
Pinout & Package
DO-214AC (SMA) package: molded plastic body with axial leads trimmed and formed for surface-mount soldering; cathode indicated by band; mechanical outline per Vishay Doc. 85594 Rev. 2.2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward bias; connected to lower-potential node in clamping configuration. | Provides low VF (1.2 V @ 0.5 A) path for fault current return during overvoltage events. |
| Cathode | Current exit point during reverse breakdown; connected to protected line or rail. | Defines clamping reference; band-marked terminal ensures correct orientation during PCB assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term Zener voltage stability and reduced parameter drift under thermal cycling. |
| Fast response time ≤1 ps | Minimizes voltage overshoot during nanosecond-scale ESD or lightning-induced transients. |
| 300 W non-repetitive surge rating | Supports single-event protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation. |
| RoHS-compliant & lead-free | Meets EU Directive 2002/95/EC and WEEE 2002/96/EC; compatible with Pb-free reflow profiles. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 48 V DC input rails in programmable logic controllers against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed across input terminals upstream of DC/DC converters. Use Value: Clamps transients to ≤78.6 V, preventing damage to 60 V-rated MOSFETs and gate drivers while surviving 300 W surge pulses. |
Use Scenario: Safeguarding LIN bus interface ICs and microcontrollers from battery voltage transients during cold-cranking or alternator load dump. IC Role / Device Role / Timing Role: Standoff clamp on 12 V auxiliary rail feeding sensor clusters and door module logic. Use Value: Maintains 47 V threshold below system max, enabling early clamping before 65 V absolute maximum ratings are exceeded. |
| Telecom DC Feeder Line | Renewable Energy Inverter Control Board |
Use Scenario: Protecting remote radio unit power inputs fed via 48 V PoE-like distribution from induced lightning surges. IC Role / Device Role / Timing Role: Primary surge suppression stage before TVS array and filtering network. Use Value: Delivers 3.8 A peak clamping current with <1 ps response, limiting voltage rise before secondary protection activates. |
Use Scenario: Shielding isolated gate drivers and current sense amplifiers on solar inverter control boards from grid-side voltage spikes. IC Role / Device Role / Timing Role: Rail clamp on auxiliary 24 V supply powering optocouplers and PWM controllers. Use Value: Operates reliably at 150 °C junction temperature, supporting compact heatsinkless designs in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47A | DO-214AA (SMB) package; 47 V VBR min = 52.2 V; VCL = 77.0 V @ 4.3 A; PPP = 600 W. | Higher surge rating but larger footprint; better suited for higher-current 48 V systems requiring >4 A clamping. | Select SMBJ47A when board space allows larger package and higher surge margin is required beyond 300 W. |
| P6SMB47A | DO-214AA (SMB); same VBR/VCL specs; 600 W PPP; RthJA ≈ 125 K/W on FR4. | Lower thermal performance on standard PCB; requires larger copper area for equivalent thermal management. | Choose P6SMB47A only if legacy SMB footprint compatibility is mandatory and thermal derating is acceptable. |
Compared with BZG04-47TR, SMBJ47A offers higher surge capacity in a slightly larger package, while P6SMB47A trades thermal efficiency for standardized SMB footprint-BZG04-47TR delivers optimal balance of 300 W surge handling, DO-214AC compactness, and 100 K/W thermal resistance on alumina substrates.
Availability
BZG04-47TR is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, telecom DC feeder lines, and renewable energy inverter control boards requiring stable component supply and consistent surge performance.
Supply support for BZG04-47TR 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 diodes, MOSFETs, and optoelectronics for industrial, automotive, and computing markets.
The BZG04-Series was engineered specifically for high-energy transient suppression in harsh-environment power systems, emphasizing glass-passivated stability, fast response, and repeatable clamping performance across temperature and life cycles.
FAQ
What is the maximum clamping voltage of the BZG04-47TR under standard test conditions?
The BZG04-47TR has a maximum clamping voltage (VCL) of 78.6 V when subjected to a 10/1000 µs surge pulse at IPP = 3.8 A. This value is specified in Vishay's Document Number 85594 Rev. 2.2 and defines the upper voltage limit imposed on protected circuitry during transient events. The BZG04-47TR maintains this clamping performance across its full operating temperature range.
Is the BZG04-47TR compatible with lead-free reflow soldering processes?
Yes, the BZG04-47TR is lead-free and RoHS-compliant per Directive 2002/95/EC, and its DO-214AC package is qualified for standard Pb-free reflow profiles including JEDEC J-STD-020. The device's glass-passivated junction ensures no degradation during peak temperatures up to 260 °C. BZG04-47TR must be handled per Vishay's moisture sensitivity level (MSL) guidance in the original datasheet.
What is the thermal resistance from junction to ambient for the BZG04-47TR on an alumina ceramic substrate?
When mounted on an Al2O3 ceramic substrate per Figure 1b in Vishay Doc. 85594, the BZG04-47TR exhibits a junction-to-ambient thermal resistance (RthJA) of 100 K/W. This value enables sustained power dissipation up to 1.25 W at Tamb = 50 °C and supports reliable operation in high-temperature environments without forced cooling. The BZG04-47TR's RthJL is 25 K/W, confirming efficient heat transfer through the leads.
Does the BZG04-47TR have a specified response time, and how is it measured?
Yes, the BZG04-47TR has a typical response time of ≤1 ps from 0 V to VZmin, measured using fast-risetime step-voltage waveforms. This ultrafast turn-on is enabled by its glass-passivated planar junction structure and is critical for suppressing ESD and lightning-induced transients before downstream components experience overstress. The BZG04-47TR's response time is validated in Vishay's characterization data and applies across its full rated voltage range.
Can the BZG04-47TR be used in bidirectional transient protection configurations?
No, the BZG04-47TR is a unidirectional Zener diode and is not rated for reverse conduction beyond its specified clamping behavior. For bidirectional protection, two BZG04-47TR devices must be connected in series opposition, or a dedicated bidirectional TVS like SMAJ47CA should be selected. Using a single BZG04-47TR in reverse-biased AC applications risks catastrophic failure due to lack of symmetrical breakdown specification. Always verify polarity in the BZG04-47TR application layout.
BZG04-47TR 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):
- 47V
- Voltage - Breakdown (Min):
- 52V
- Voltage - Clamping (Max) @ Ipp:
- 78.6V
- Current - Peak Pulse (10/1000µs):
- 3.8A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 330pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
BZG04-47TR FAQ
1.How can I place an order for BZG04-47TR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZG04-47TR 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 BZG04-47TR reliable?
The price and inventory of BZG04-47TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZG04-47TR is usually 5 days.
3.What payment methods are accepted for BZG04-47TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZG04-47TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZG04-47TR?
BZG04-47TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZG04-47TR 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 BZG04-47TR?
For technical support, including BZG04-47TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZG04-47TR requirements.
6.How does Aetrix verify that BZG04-47TR is sourced from the original manufacturer or authorized distributors?
All BZG04-47TR 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 BZG04-47TR meets industry standards.
7.What is the process for return or replacement of BZG04-47TR?
All BZG04-47TR units undergo pre-shipment inspection (PSI). If there is an issue with BZG04-47TR, 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 BZG04-47TR part is unused and in its original packaging.
Return procedure for BZG04-47TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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