Vishay General Semiconductor - Diodes Division BZG04-150TR3

Overview

BZG04-150TR3 from Vishay Semiconductors is a glass-passivated, high-reliability Zener diode optimized for transient voltage suppression in power rails and signal lines, with a nominal breakdown voltage of 150 V, 300 W non-repetitive peak surge power rating (10/1000 µs), and DO-214AC package. It delivers clamping voltage of 249 V at 1.2 A surge current and operates up to 150 °C junction temperature.

For engineers reviewing the BZG04-150TR3 datasheet, BZG04-150TR3 pinout, BZG04-150TR3 application, or BZG04-150TR3 equivalent, this device is selected for high-energy surge protection where precise standoff voltage, fast response (≤1 ps), and robust thermal performance under pulsed stress are critical design requirements.

Technical Context

The BZG04-150TR3 functions as a unidirectional voltage-clamping device in parallel with protected circuitry, conducting only when reverse voltage exceeds its 150 V standoff threshold. Its glass-passivated junction ensures stable leakage (<5 µA) and tight V_Z tolerance (±5 % min/max spread per datasheet).

Thermal design relies on low junction-to-lead resistance (25 K/W) and configurable R_thJA (100–150 K/W depending on PCB mounting), enabling reliable operation under repetitive transients when mounted on Al₂O₃ ceramic or epoxy-glass substrates.

Key Specifications

Pinout & Package

DO-214AC (SMA) package: molded plastic body with axial leads trimmed and formed for surface-mount assembly; cathode indicated by band; standard JEDEC outline.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener-based transient suppression applications.

Compared with SMBJ150A and P6SMB150A, the BZG04-150TR3 offers tighter V_Z tolerance, lower clamping voltage, and DO-214AC compatibility-making it optimal for space-constrained industrial controls where precision clamping and RoHS compliance are prioritized over ultra-high surge headroom.

Availability

BZG04-150TR3 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and renewable energy inverters requiring stable component supply, consistent parametric performance, and full traceability across production batches.

Supply support for BZG04-150TR3 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 demanding industrial, automotive, and computing applications.

The BZG04-Series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing stable Zener voltage, low thermal resistance, and robust surge endurance in compact surface-mount packages.

FAQ

What is the maximum clamping voltage of the BZG04-150TR3 under standard test conditions?

The BZG04-150TR3 has a maximum clamping voltage of 249 V when subjected to a 10/1000 µs surge current pulse of 1.2 A, as specified in the Vishay BZG04-Series datasheet (Doc. 85594, Rev. 2.2). This value is measured at T_j = 25 °C and defines the upper voltage limit imposed on protected circuitry during transient events. The BZG04-150TR3 maintains this clamping performance consistently across its qualified operating temperature range.

Is the BZG04-150TR3 suitable for use in automotive applications compliant with ISO 7637-2?

Yes, the BZG04-150TR3 is suitable for ISO 7637-2 Pulse 5a (load dump) protection in automotive body control modules, provided it is mounted with adequate thermal relief (e.g., on Al₂O₃ ceramic) and used within its 150 °C junction temperature limit. Its 300 W surge rating and ≤1 ps response time meet the fast-rising edge requirements of Pulse 5a, and the BZG04-150TR3's glass-passivated construction ensures reliability under thermal cycling and vibration stress.

What is the junction-to-ambient thermal resistance (R_thJA) of the BZG04-150TR3 in standard PCB mounting?

The BZG04-150TR3 exhibits R_thJA = 150 K/W when mounted on epoxy-glass hard tissue per Figure 1a in the datasheet, and 125 K/W per Figure 1b. With Al₂O₃ ceramic substrate, R_thJA improves to 100 K/W. These values directly impact safe continuous power dissipation: at T_amb = 50 °C and R_thJA = 100 K/W, the BZG04-150TR3 supports 1.25 W steady-state dissipation without exceeding 150 °C junction temperature.

Does the BZG04-150TR3 have a specified junction capacitance, and how does it affect high-frequency performance?

Yes, the BZG04-150TR3 has a typical junction capacitance of 140 pF at V_R = 0 V and f = 1 MHz, as confirmed in the Electrical Characteristics table. This capacitance remains stable across bias and contributes minimal loading to signal lines below 10 MHz. For high-speed data lines, the BZG04-150TR3 is best applied on power rails rather than signal paths; its 140 pF value is appropriate for DC/low-frequency protection in motor drives and power supplies where bandwidth constraints are not critical.

How does the BZG04-150TR3 differ from the BZG04-150TR in terms of packaging and reel configuration?

The BZG04-150TR3 is supplied on a 13-inch reel containing 6,000 units per reel (6 k/box), whereas the BZG04-150TR uses a 7-inch reel with 1,500 units. Both share identical electrical specifications, DO-214AC packaging, and RoHS compliance. The "TR3" suffix denotes the higher-volume tape-and-reel format optimized for high-throughput SMT lines, while the BZG04-150TR3 maintains full interchangeability with BZG04-150TR in circuit design and layout.