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Vishay General Semiconductor - Diodes Division BZG04-33TR
- Part No.:
- BZG04-33TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
BZG04-33TR.pdf
- Description:
- TVS DIODE 33VWM 54.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,654
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Product details
Overview
BZG04-33TR from Vishay Semiconductors is a glass-passivated, surface-mount Zener diode designed for transient voltage suppression in power rails and signal lines. It features a nominal Zener voltage of 33 V, 300 W non-repetitive peak surge power (10/1000 µs), 5.5 A clamping current at 54.1 V, and DO-214AC (SMC) package. It is used in industrial power supply overvoltage protection circuits.
For engineers reviewing the BZG04-33TR datasheet, BZG04-33TR pinout, BZG04-33TR application, or BZG04-33TR equivalent, key selection criteria include clamping voltage at rated surge current, 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 BZG04-33TR operates as a unidirectional voltage-clamping device with fast response time (≤1 ps), leveraging glass-passivated junction technology for high reliability under repetitive surge stress. Its electrical behavior is defined by precise Zener breakdown (37 V min at 10 mA), low dynamic impedance, and stable temperature coefficient (±0.11 %/K).
Thermal performance depends on PCB mounting: RthJA is 125 K/W when mounted per Figure 1b on epoxy-glass hard tissue, and 100 K/W on Al2O3 ceramic. Power derating begins above 50 °C ambient, with 1.25 W max at Tamb = 50 °C and RthJA < 100 K/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 33 V nominal standoff; 37 V min breakdown at 10 mA ensures reliable turn-on before system damage threshold |
| Clamping Voltage | 54.1 V at 5.5 A IPP - defines maximum voltage seen by protected circuit during 10/1000 µs surge |
| Surge Power | 300 W non-repetitive (10/1000 µs) - enables handling of IEC 61000-4-5 Level 4 surges without failure |
| Junction Temp Limit | 150 °C - sets maximum allowable operating temperature for continuous reliability in enclosed enclosures |
| Package | DO-214AC (SMC) - industry-standard SMD outline with 77 mg mass and validated thermal pad layout per Fig. 1a/b |
| RoHS Compliance | Lead-free, compliant with 2002/95/EC and WEEE 2002/96/EC - meets global environmental and procurement mandates |
Pinout & Package
Package: DO-214AC (SMC), surface-mount, cathode-banded end. Standard two-terminal configuration with anode and cathode leads formed for reflow-compatible PCB mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward bias; reference node for reverse-bias clamping | Connected to lower-potential rail (e.g., GND or return path); establishes polarity for unidirectional clamping |
| Cathode | Current exit point during forward bias; high-impedance terminal during reverse operation until breakdown | Connected to protected line (e.g., 33 V rail); conducts surge current to anode when voltage exceeds 37 V |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable long-term Zener voltage tolerance and immunity to humidity-induced parameter drift |
| Fast response time ≤1 ps | Ensures clamping activation before transient energy couples into downstream ICs or regulators |
| High surge current rating (50 A IFSM) | Supports robust protection against 10 ms half-sine surges common in motor drive and relay switching environments |
| Low junction capacitance (420 pF) | Minimizes signal distortion and loading on high-speed data lines when used in bidirectional or low-voltage signal protection |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 33 V auxiliary rail in programmable logic controller (PLC) power stage exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed between 33 V rail and ground. Use Value: Clamps transients to ≤54.1 V within 1 ps, preventing damage to 33 V-rated DC-DC controllers and microcontrollers. | Use Scenario: LIN bus line protection in BCM where 33 V supply powers local sensors and actuators. IC Role / Device Role / Timing Role: Standoff diode guarding LIN transceiver VCC input against battery voltage spikes. Use Value: Maintains 33 V system integrity with 5.5 A clamping capability and 125 K/W thermal resistance on standard FR4. |
| Telecom AC/DC Front-End | Renewable Energy Inverter DC Link |
Use Scenario: Secondary-side 33 V bias supply in telecom AC/DC adapter subjected to conducted EFT bursts. IC Role / Device Role / Timing Role: Primary overvoltage clamp on isolated 33 V output rail prior to LDO regulator. Use Value: Limits voltage excursions to safe levels using 300 W surge rating and 150 °C junction limit for sustained operation. | Use Scenario: Overvoltage protection on 33 V auxiliary control rail in solar inverter gate driver stage. IC Role / Device Role / Timing Role: Transient suppressor across isolated 33 V supply feeding high-side IGBT drivers. Use Value: Survives repeated 10/1000 µs surges up to 300 W while maintaining stable 33 V reference via ±0.11 %/K tempco. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | Higher clamping voltage (59.3 V @ 5.3 A); same DO-214AA package; 600 W surge rating | Less precise voltage regulation due to wider VZ tolerance; better suited for higher-energy surges where clamping level margin exists | Select SMBJ33A only if system can tolerate >59 V transient excursion and requires higher single-pulse energy absorption |
| P6SMB33A | Same clamping voltage (59.3 V @ 5.3 A); identical DO-214AA footprint; 600 W rating; slightly higher leakage (1 µA vs. 5 µA) | Designed for broader industrial use; less optimized for tight 33 V rail margin; longer response time (~1 ns) | Prefer P6SMB33A when cost sensitivity outweighs sub-ns response need and 33 V system margin allows 59.3 V clamping |
Compared with BZG04-33TR, SMBJ33A and P6SMB33A offer higher surge ratings but sacrifice clamping precision and speed-BZG04-33TR's 54.1 V clamping and ≤1 ps response make it optimal for tightly regulated 33 V systems requiring minimal overvoltage exposure.
Availability
BZG04-33TR is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, and telecom AC/DC front-end designs requiring stable component supply and RoHS-compliant transient suppression.
Supply support for BZG04-33TR 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 space-constrained SMD applications, emphasizing glass-passivation stability, tight Zener voltage control, and repeatable clamping performance across temperature.
FAQ
What is the Zener breakdown voltage specification for BZG04-33TR?
The BZG04-33TR has a minimum Zener breakdown voltage of 37 V at test current IZT = 10 mA, with typical value 37 V and maximum 40 V. This defines its precise turn-on threshold for clamping - critical for protecting 33 V systems where overvoltage margin is narrow. The BZG04-33TR maintains this specification across its full operating temperature range with a temperature coefficient of ±0.11 %/K.
Does BZG04-33TR support bidirectional transient suppression?
No, BZG04-33TR is a unidirectional Zener diode intended for single-polarity clamping - cathode to protected line, anode to ground. It does not provide symmetrical clamping for AC or differential signals. For bidirectional protection, a TVS array or back-to-back Zener pair (e.g., two BZG04-33TR devices) would be required. The BZG04-33TR datasheet specifies only reverse-bias breakdown and forward conduction (VF = 1.2 V at 0.5 A).
What is the thermal resistance of BZG04-33TR when mounted on standard FR4 PCB?
When mounted per Figure 1b on epoxy-glass hard tissue (standard FR4), the BZG04-33TR exhibits a junction-to-ambient thermal resistance (RthJA) of 125 K/W. This value assumes copper overlay per specification and directly impacts power derating - for example, maximum dissipation drops to 1.25 W at Tamb = 50 °C. The BZG04-33TR's RthJL is 25 K/W, enabling effective heat transfer through leads.
Can BZG04-33TR replace BZG04-33TR3 in a design?
Yes - BZG04-33TR and BZG04-33TR3 share identical electrical and thermal specifications; the suffix "TR3" denotes packaging in a 6 k unit 13-inch reel (vs. 1.5 k on 7-inch reel for "TR"). No changes to schematic, layout, or thermal design are needed. Both variants use the same DO-214AC package and perform identically in-circuit. The BZG04-33TR and BZG04-33TR3 differ only in tape-and-reel configuration and quantity per reel.
Is BZG04-33TR suitable for automotive applications per AEC-Q200?
No - the BZG04-33TR is not AEC-Q200 qualified. While it meets RoHS and operates up to 150 °C junction temperature, Vishay does not list it in AEC-Q200 stress-tested automotive-grade product families. For automotive use, consider AEC-Q200-qualified alternatives such as SMAJ33A or SMCJ33A. The BZG04-33TR is specified for industrial and general-purpose transient suppression, not automotive qualification requirements.
BZG04-33TR 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):
- 33V
- Voltage - Breakdown (Min):
- 37V
- Voltage - Clamping (Max) @ Ipp:
- 54.1V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 420pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
BZG04-33TR FAQ
1.How can I place an order for BZG04-33TR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZG04-33TR 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 BZG04-33TR reliable?
The price and inventory of BZG04-33TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZG04-33TR is usually 5 days.
3.What payment methods are accepted for BZG04-33TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZG04-33TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZG04-33TR?
BZG04-33TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZG04-33TR 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 BZG04-33TR?
For technical support, including BZG04-33TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZG04-33TR requirements.
6.How does Aetrix verify that BZG04-33TR is sourced from the original manufacturer or authorized distributors?
All BZG04-33TR 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 BZG04-33TR meets industry standards.
7.What is the process for return or replacement of BZG04-33TR?
All BZG04-33TR units undergo pre-shipment inspection (PSI). If there is an issue with BZG04-33TR, 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 BZG04-33TR part is unused and in its original packaging.
Return procedure for BZG04-33TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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