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Vishay General Semiconductor - Diodes Division BZG04-120TR
- Part No.:
- BZG04-120TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
BZG04-120TR.pdf
- Description:
- TVS DIODE 120VWM 204VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,012
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Product details
Overview
BZG04-120TR from Vishay Semiconductors is a glass-passivated Zener diode designed for high-energy transient voltage suppression in power supply and interface protection circuits. It features a 120 V standoff voltage, 204 V clamping voltage at 1.5 A peak pulse current, 300 W non-repetitive surge power rating, and DO-214AC (SMA) package with 150 °C maximum junction temperature.
For engineers reviewing the BZG04-120TR datasheet, BZG04-120TR pinout, BZG04-120TR application, or BZG04-120TR equivalent, key selection criteria include clamping performance under 10/1000 µs surge, thermal resistance on epoxy-glass PCB (125 K/W), and compliance with RoHS 2002/95/EC for industrial and automotive board-level ESD/surge protection.
Technical Context
The BZG04-120TR operates as a unidirectional voltage clamp with precise Zener breakdown at 138 V (min) to 153 V (max) under 5 µA test current. Its fast response time (≤1 ps) enables effective suppression of nanosecond-scale transients, while its glass-passivated junction ensures long-term stability under repeated surge stress.
Thermal design relies on low junction-to-lead resistance (25 K/W) and mounting-dependent junction-to-ambient resistance (100–150 K/W), requiring careful PCB copper area planning. The device is rated for 50 A peak forward surge current and supports operation across -65 °C to +150 °C storage and junction temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VR) | 120 V - Maximum continuous reverse voltage before significant leakage begins |
| Zener Breakdown Voltage (V(BR)) | 138 V min / 153 V max @ 5 µA - Tight tolerance band ensures predictable clamping onset |
| Clamping Voltage (VCL) | 204 V @ 1.5 A (10/1000 µs) - Peak voltage seen by protected circuit during surge event |
| Non-repetitive Surge Power | 300 W @ 10/1000 µs - Enables single-event protection against IEC 61000-4-5 Level 4 surges |
| Junction-to-Lead Thermal Resistance | 25 K/W - Critical for calculating local temperature rise under pulsed power dissipation |
| Package Type | DO-214AC (SMA) - Industry-standard surface-mount outline with 77 mg mass and defined thermal pad requirements |
| RoHS Compliance | Yes - Lead-free and compliant with Directive 2002/95/EC, suitable for green manufacturing |
Pinout & Package
DO-214AC (SMA) package: molded plastic body with axial leads trimmed and formed for surface-mount assembly; cathode indicated by band; standard footprint per JEDEC DO-214AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward conduction terminal | Connected to lower-potential side of protected line; carries surge current during reverse clamp |
| Cathode (K) | Zener reference terminal | Marked with band; connected to higher-potential side; defines clamping threshold relative to ground or rail |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable Zener voltage over time and temperature, with <0.13 %/K tempco and minimal parameter drift after 1000 hrs life testing |
| High surge capability | Withstands 300 W (10/1000 µs) and 50 A half-sine (10 ms), enabling robust protection in AC mains and DC bus interfaces |
| Fast response time | ≤1 ps rise time allows clamping before transient energy couples into downstream ICs or sensors |
| Low junction capacitance | 150 pF @ 0 V - Minimizes signal distortion in high-speed data lines when used in bidirectional configurations with series resistors |
| RoHS-compliant construction | Lead-free terminations and halogen-free molding compound meet global environmental compliance without derating |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and current sense amplifiers from inductive kickback during MOSFET/IGBT switching in 24 V DC bus systems. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor placed across DC link or gate resistor network. Use Value: Clamps 204 V spikes within 1 ps, limiting stress on 30 V-rated op-amps and logic-level drivers without adding propagation delay. |
Use Scenario: Input protection for LIN bus transceivers and microcontroller I/O pins exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Standoff-clamp element in front-end filter stage, operating in parallel with TVS arrays. Use Value: Withstands 300 W surge pulses while maintaining 120 V standoff-compatible with ISO 7637-2 Pulse 5a (load dump) requirements. |
| Telecom Power Supplies | Renewable Energy Inverters |
Use Scenario: Secondary-side overvoltage protection on 48 V telecom rectifier outputs feeding PoE PSE controllers. IC Role / Device Role / Timing Role: Zener clamp referenced to system ground, triggered only during fault conditions exceeding nominal regulation window. Use Value: 138–153 V breakdown range avoids nuisance triggering during normal 48 V ±10 % ripple, yet activates decisively during open-regulator faults. |
Use Scenario: DC-link surge suppression in solar string inverters where PV array transients exceed 100 V due to lightning-induced coupling. IC Role / Device Role / Timing Role: Primary passive clamp on MPPT input stage, coordinated with MOVs and gas discharge tubes. Use Value: 204 V clamping at 1.5 A provides tighter voltage control than 220 V MOVs, reducing stress on 250 V-rated electrolytic capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener-based transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A | Higher clamping voltage (209 V @ 1.5 A), same DO-214AA package, bidirectional variant available | Designed for IEC 61000-4-5 compliance with standardized test waveforms; less precise Zener tolerance (±5 % vs. ±10 % for BZG04-120TR) | Select SMBJ120A when standardized surge testing certification is required; prefer BZG04-120TR for tighter voltage control in custom clamp networks. |
| 1N5955B | Through-hole DO-41 package, lower surge rating (50 W), 120 V nominal Zener, ±5 % tolerance | Intended for low-energy signal-line protection; lacks surge current rating and thermal specs for power rail use | Choose 1N5955B only for prototyping or low-risk analog sensor inputs; BZG04-120TR is mandatory for DC bus or motor drive applications. |
Compared with SMBJ120A and 1N5955B, the BZG04-120TR delivers superior thermal robustness (25 K/W RthJL), faster response (≤1 ps), and verified 300 W surge capability-making it uniquely suited for high-reliability industrial power stage protection where parametric precision and pulse endurance are critical.
Availability
BZG04-120TR is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, consistent surge performance, and RoHS-compliant sourcing.
Supply support for BZG04-120TR 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 environments, emphasizing glass-passivated stability, repeatable clamping, and extended thermal survivability beyond standard Zener ratings.
FAQ
What is the maximum clamping voltage of the BZG04-120TR under standard surge conditions?
The BZG04-120TR has a maximum clamping voltage of 204 V when subjected to a 10/1000 µs surge pulse at 1.5 A peak current, as specified in the Vishay BZG04-Series datasheet (Doc. #85594, Rev. 2.2). This value is measured at Tj = 25 °C and defines the upper voltage limit imposed on protected circuitry during transient events. The BZG04-120TR maintains this clamping performance across its full operating temperature range.
Is the BZG04-120TR suitable for bidirectional transient protection?
No-the BZG04-120TR is a unidirectional Zener diode intended for reverse-biased clamping only. It does not provide symmetrical protection like a bidirectional TVS. For bidirectional applications, two BZG04-120TR devices must be connected in series opposition, or a dedicated bidirectional device such as SMBJ120CA should be selected. The BZG04-120TR datasheet explicitly defines electrical characteristics only for reverse breakdown and forward conduction.
What is the thermal resistance from junction to ambient for the BZG04-120TR on a standard PCB layout?
When mounted on an epoxy-glass hard tissue PCB per Figure 1b in the BZG04-Series datasheet, the BZG04-120TR exhibits a junction-to-ambient thermal resistance (RthJA) of 125 K/W. This value assumes standard DO-214AC pad layout with no additional copper pour; adding thermal vias or copper planes can reduce RthJA to as low as 100 K/W on Al₂O₃ ceramic substrates, as confirmed in the Vishay thermal characterization data for the BZG04-120TR.
Does the BZG04-120TR meet automotive qualification standards such as AEC-Q200?
The BZG04-120TR is not AEC-Q200 qualified. While it meets RoHS 2002/95/EC and WEEE 2002/96/EC, and its construction supports automotive temperature ranges (-65 °C to +150 °C), Vishay does not list AEC-Q200 qualification for the BZG04-Series in any official documentation. For AEC-Q200-compliant alternatives, engineers should consider Vishay's Automotive-grade SMAJ or SMCJ series TVS diodes instead of the BZG04-120TR.
What is the typical junction capacitance of the BZG04-120TR at zero bias?
The typical junction capacitance of the BZG04-120TR is 150 pF when measured at VR = 0 V and f = 1 MHz, as published in the Electrical Characteristics table of the Vishay BZG04-Series datasheet. This value is critical for high-frequency signal integrity analysis-especially when the BZG04-120TR is used near communication lines or clock inputs-and remains stable across temperature due to the device's glass-passivated junction structure.
BZG04-120TR 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):
- 120V
- Voltage - Breakdown (Min):
- 138V
- Voltage - Clamping (Max) @ Ipp:
- 204V
- Current - Peak Pulse (10/1000µs):
- 1.5A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 150pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
BZG04-120TR FAQ
1.How can I place an order for BZG04-120TR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZG04-120TR 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 BZG04-120TR reliable?
The price and inventory of BZG04-120TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZG04-120TR is usually 5 days.
3.What payment methods are accepted for BZG04-120TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZG04-120TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZG04-120TR?
BZG04-120TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZG04-120TR 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 BZG04-120TR?
For technical support, including BZG04-120TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZG04-120TR requirements.
6.How does Aetrix verify that BZG04-120TR is sourced from the original manufacturer or authorized distributors?
All BZG04-120TR 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 BZG04-120TR meets industry standards.
7.What is the process for return or replacement of BZG04-120TR?
All BZG04-120TR units undergo pre-shipment inspection (PSI). If there is an issue with BZG04-120TR, 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 BZG04-120TR part is unused and in its original packaging.
Return procedure for BZG04-120TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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