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Vishay General Semiconductor - Diodes Division BZG04-91TR
- Part No.:
- BZG04-91TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
BZG04-91TR.pdf
- Description:
- TVS DIODE 91VWM 152VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,739
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Product details
Overview
BZG04-91TR from Vishay Semiconductors is a glass-passivated Zener diode designed for high-energy transient voltage suppression in DC power rails and signal lines. It features a nominal Zener breakdown voltage of 104 V at 5 mA, clamps transients to ≤152 V at 2 A peak pulse current, and delivers 300 W non-repetitive surge power handling (10/1000 µs waveform) with ≤1 ps response time. It is used in industrial power supply input protection and telecom line interface surge circuits.
For engineers reviewing the BZG04-91TR datasheet, BZG04-91TR pinout, BZG04-91TR application, or BZG04-91TR equivalent, key selection criteria include its 104 V Zener voltage tolerance, 152 V clamping performance at 2 A, DO-214AC package thermal resistance (125 K/W on epoxy-glass hard tissue), 150 °C junction rating, and RoHS-compliant lead-free construction.
Technical Context
The BZG04-91TR operates as a unidirectional voltage-clamping device, leveraging a glass-passivated PN junction to maintain stable reverse breakdown under fast-rising transients. Its 1 ps typical response ensures effective suppression of ESD and lightning-induced surges before downstream ICs are stressed.
Thermal design relies on its low junction-to-lead resistance (25 K/W) and configurable junction-to-ambient resistance (100–150 K/W depending on PCB mounting), enabling reliable 3 W continuous dissipation at 100 °C ambient when properly heatsinked via copper pour or ceramic substrate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 104 V min / 114 V max at IZT = 5 mA - defines precise clamping threshold for overvoltage detection |
| Clamping Voltage (VCL) | 152 V max at IPP = 2 A (10/1000 µs) - limits peak stress on protected circuitry during surge events |
| Surge Power (PZSM) | 300 W non-repetitive - supports single-event lightning strike or EFT immunity per IEC 61000-4-5 Level 4 |
| Junction Temperature | 150 °C max - enables operation in high-ambient industrial environments with appropriate PCB thermal relief |
| Package | DO-214AC (SMA) - surface-mount footprint compatible with automated assembly and provides 77 mg mass for thermal inertia |
| Leakage Current (IR) | 5 µA max at VR = 91 V - ensures minimal standby power loss in always-on protection circuits |
| Response Time | ≤1 ps (0 to VZmin) - faster than most TVS diodes, critical for sub-nanosecond ESD events (IEC 61000-4-2) |
Pinout & Package
Package: DO-214AC (SMA), molded plastic case with axial leads trimmed and formed for surface-mount soldering; case outline per JEDEC DO-214AC standard; weight ≈ 77 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased Zener terminal | Connected to protected node; conducts during overvoltage to clamp voltage to VZ |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping current path |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term Zener voltage drift (<±2 % over 1000 hrs) and high humidity reliability without hermetic sealing |
| Fast response time (≤1 ps) | Prevents overshoot beyond VCL during nanosecond-scale ESD events, protecting sensitive analog front-ends |
| 300 W surge rating (10/1000 µs) | Meets IEC 61000-4-5 Level 4 (4 kV line-earth, 2 kV line-line) without external series impedance |
| Lead (Pb)-free & RoHS-compliant | Supports green manufacturing requirements and eliminates post-soldering lead contamination risks |
| DO-214AC package | Standardized SMT footprint allows drop-in replacement across Vishay's BZG04 family and simplifies PCB layout reuse |
Applications
| Industrial Power Input Protection | Telecom Line Interface |
|---|---|
Use Scenario: 24 V DC industrial PLC power input subjected to load dump and inductive switching transients up to 100 V. IC Role / Device Role / Timing Role: Primary shunt clamping device placed directly across input terminals before filtering stage. Use Value: Limits transient excursions to ≤152 V, preventing damage to upstream DC/DC converters rated for 60 V input max. |
Use Scenario: T1/E1 line card interface exposed to lightning-induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: First-stage surge suppressor in hybrid protection circuit with gas discharge tube and series impedance. Use Value: Responds within 1 ps to clamp fast-rising edges before GDT fires, reducing let-through energy by >40 % vs. GDT-only solution. |
| Automotive Body Control Module | Medical Equipment Power Rails |
Use Scenario: 12 V battery-supplied BCM module encountering ISO 7637-2 Pulse 5a (load dump, 60 V/400 ms). IC Role / Device Role / Timing Role: Secondary clamping element after transient voltage suppressor (TVS) array, handling residual overshoot. Use Value: Absorbs 300 W surge energy without degradation, maintaining <1 % VZ shift after 1000 pulses. |
Use Scenario: Isolated 48 V auxiliary power rail in diagnostic imaging equipment requiring ultra-low leakage and ESD immunity. IC Role / Device Role / Timing Role: Standby-mode overvoltage protector on isolated DC bus, active only during fault conditions. Use Value: Delivers 5 µA max leakage at 91 V, minimizing standby current drain while providing 152 V clamping during ESD events. |
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 |
|---|---|---|---|
| SMBJ100A | Unidirectional TVS diode; 100 V standoff, 165 V clamping at 2.5 A; higher capacitance (150 pF vs. 243 pF) | Optimized for lower clamping voltage but slower response (>1 ns); less suitable for sub-nanosecond ESD | Select SMBJ100A when clamping voltage margin is tighter than speed requirement, and board space allows larger SMB package |
| P6SMB100A | Higher surge rating (600 W), same 100 V standoff, but 1000 ns response time and 10× higher leakage (50 µA at 91 V) | Designed for bulk surge absorption (lightning), not precision fast clamping; unsuitable for low-leakage medical rails | Choose P6SMB100A only for high-energy, low-frequency transients where speed and leakage are secondary concerns |
Compared with SMBJ100A and P6SMB100A, the BZG04-91TR offers superior speed (≤1 ps vs. >1 ns), lower leakage (5 µA vs. ≥50 µA), and tighter VZ tolerance (±5 % vs. ±10 %), making it preferred for precision ESD protection in signal integrity-critical and low-power systems.
Availability
BZG04-91TR is available at Aetrix Electronics and suitable for industrial power input protection, telecom line interface surge suppression, and automotive body control module designs requiring stable component supply and full traceability.
Supply support for BZG04-91TR 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 demanding industrial, automotive, and telecom applications.
The BZG04-Series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing fast response, stable Zener voltage, and robust surge endurance in compact surface-mount packages.
FAQ
What is the Zener breakdown voltage specification for BZG04-91TR?
The BZG04-91TR has a guaranteed Zener breakdown voltage range of 104 V minimum to 114 V maximum at test current IZT = 5 mA, per Vishay Document Number 85594 Rev. 2.2. This 10 V window reflects tight process control for consistent clamping behavior across production lots, and the BZG04-91TR maintains this specification over its full operating temperature range (−65 °C to +150 °C).
Does BZG04-91TR meet RoHS and lead-free requirements?
Yes, the BZG04-91TR is explicitly certified as lead (Pb)-free and compliant with RoHS Directive 2002/95/EC and WEEE Directive 2002/96/EC, as stated in the official Vishay datasheet. The device uses matte tin-plated terminations and contains no restricted substances above threshold limits, making it suitable for environmentally regulated production programs.
What is the maximum clamping voltage of BZG04-91TR under surge conditions?
The BZG04-91TR clamps to a maximum of 152 V at a peak pulse current (IPP) of 2 A with a 10/1000 µs waveform, as specified in the Electrical Characteristics table. This value is measured at Tj = 25 °C and defines the upper voltage limit imposed on protected circuitry during standardized surge events such as IEC 61000-4-5 testing.
Can BZG04-91TR be used in bidirectional transient protection circuits?
No, the BZG04-91TR is a unidirectional Zener diode and must be used with correct polarity-cathode toward the protected line. For bidirectional protection, two BZG04-91TR devices may be connected in series opposing configuration, but Vishay does not characterize or guarantee performance in that arrangement; dedicated bidirectional TVS diodes like SMAJ100CA are recommended instead.
What thermal resistance values apply to BZG04-91TR in PCB layout?
The BZG04-91TR exhibits RthJA = 125 K/W when mounted on epoxy-glass hard tissue per Figure 1b of the datasheet, and RthJL = 25 K/W junction-to-lead. Layout best practices include using ≥10 mm² copper pour under the cathode pad and ≥5 mm² under the anode pad to achieve the 125 K/W rating; insufficient copper increases thermal resistance and reduces safe continuous power dissipation.
BZG04-91TR 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):
- 91V
- Voltage - Breakdown (Min):
- 104V
- Voltage - Clamping (Max) @ Ipp:
- 152V
- Current - Peak Pulse (10/1000µs):
- 2A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 243pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
BZG04-91TR FAQ
1.How can I place an order for BZG04-91TR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZG04-91TR 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 BZG04-91TR reliable?
The price and inventory of BZG04-91TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZG04-91TR is usually 5 days.
3.What payment methods are accepted for BZG04-91TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZG04-91TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZG04-91TR?
BZG04-91TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZG04-91TR 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 BZG04-91TR?
For technical support, including BZG04-91TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZG04-91TR requirements.
6.How does Aetrix verify that BZG04-91TR is sourced from the original manufacturer or authorized distributors?
All BZG04-91TR 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 BZG04-91TR meets industry standards.
7.What is the process for return or replacement of BZG04-91TR?
All BZG04-91TR units undergo pre-shipment inspection (PSI). If there is an issue with BZG04-91TR, 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 BZG04-91TR part is unused and in its original packaging.
Return procedure for BZG04-91TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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