My Inquiry
My Account
STMicroelectronics BZW04-5V8
- Part No.:
- BZW04-5V8
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
BZW04-5V8.pdf
- Description:
- TVS DO15 5.8V 400W UNIDIR
- Quantity:
- Payment:
- Shipping:
Inventory:6,832
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZW04-5V8 from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode in DO-15 package, designed for primary-level ESD and surge protection in low-voltage DC circuits. It features a 5.8 V stand-off voltage (VRM), 10.5 V clamping voltage (VCL) at 38 A peak pulse current (IPP), 400 W peak pulse power (10/1000 µs), and operates up to 175 °C junction temperature - ideal for protecting USB ports, sensor interfaces, and industrial I/O lines.
For engineers reviewing the BZW04-5V8 datasheet, BZW04-5V8 pinout, BZW04-5V8 application, or BZW04-5V8 equivalent, key selection criteria include clamping performance at low VRM, leakage current stability over temperature, thermal derating above 25 °C, and compatibility with JEDEC DO-204AC board layouts and reflow profiles.
Technical Context
The BZW04-5V8 uses planar silicon junction technology optimized for low leakage (<1000 nA at VRM) and high thermal robustness, enabling reliable operation at Tj = 175 °C without parameter drift. Its dynamic resistance (RD = 0.088 Ω) ensures rapid voltage clamping during 10/1000 µs transients, while its 3500 pF junction capacitance at 0 V (f = 1 MHz) supports stable signal integrity in sub-10 MHz analog and digital interfaces.
It complies with IEC 61000-4-2 (±30 kV air/contact discharge), IEC 61000-4-4 level 4 (4 kV), and UL 497B - making it suitable for secondary-side protection in AC/DC adapters, PLC input modules, and automotive body electronics where low stand-off voltage and high surge margin are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 5.8 V - blocks normal operating voltage up to this level before entering avalanche conduction |
| Breakdown Voltage (VBR) | 6.45 V min at 1 mA - precise threshold for controlled avalanche initiation under overvoltage |
| Clamping Voltage (VCL) | 10.5 V at 38 A (10/1000 µs) - limits downstream circuit voltage during surge events |
| Peak Pulse Power (PPP) | 400 W (10/1000 µs) - sustains repetitive surges without degradation in standard PCB layout |
| Junction Temperature Range | –55 °C to +175 °C - enables deployment in engine bay, industrial enclosures, and sealed power supplies |
| Leakage Current (IRM) | ≤1000 nA at VRM - preserves battery life and signal fidelity in always-on sensor nodes |
| Junction Capacitance (CJ) | 3500 pF at 0 V - compatible with low-speed serial buses (e.g., RS-232, CAN FD physical layer filtering) |
Pinout & Package
DO-15 (JEDEC DO-204AC) axial-leaded package with cathode band marking. Lead finish: matte tin plating. Compatible with wave and reflow soldering per J-STD-020 MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal during forward bias | Connected to protected line (e.g., VBUS, signal trace); forms low-impedance path to ground during reverse surge |
| Cathode (banded end) | Avalanche conduction terminal | Connected to system ground; defines polarity-sensitive clamping behavior for unidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature reliability | Rated for continuous operation at Tj = 175 °C with no derating of VBR or VCL |
| Low dynamic resistance | RD = 0.088 Ω ensures minimal overshoot during fast-rising transients (e.g., ESD) |
| ESD immunity beyond IEC 61000-4-2 Level 4 | Withstands ±30 kV contact/air discharge - exceeds standard requirements for industrial field equipment |
| Stable leakage vs. temperature | IR ≤ 1000 nA at VRM across –55 °C to +125 °C - critical for battery-powered IoT sensors |
| UL 497B certified | Approved for telecom/data line protection per UL 497B (QVGQ2.E136224) - simplifies safety certification |
Applications
| USB 2.0 Port Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting D+ and D– lines of embedded USB host controllers against ESD events during hot-plug insertion. IC Role / Device Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients without affecting DC signaling. Use Value: Maintains <10.5 V clamping at 38 A while adding only 3500 pF capacitance - avoids signal integrity loss on 480 Mbps links. | Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to lightning-induced surges. IC Role / Device Role: Primary-level TVS on loop supply rail to absorb 400 W transients before reaching precision op-amps and ADC front-ends. Use Value: Operates reliably at 175 °C ambient - eliminates thermal shutdown risk in sealed control cabinets. |
| AC/DC Adapter Secondary Side | Automotive Body Control Module |
Use Scenario: Suppressing switching noise and load-dump transients on the 5 V output rail of isolated flyback converters. IC Role / Device Role: Low-VRM TVS placed across output capacitor to limit voltage spikes during transient load changes. Use Value: 5.8 V VRM aligns with 5 V nominal rail; 10.5 V VCL prevents overvoltage damage to downstream LDOs and microcontrollers. | Use Scenario: Protecting LIN bus transceivers and door module switches from battery reverse-polarity and jump-start surges. IC Role / Device Role: Unidirectional TVS on VBAT-supplied IO lines to clamp negative transients and positive spikes simultaneously via ground reference. Use Value: Complies with ISO 7637-2 Pulse 1/2a/3a - validated for automotive-grade surge immunity without external series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0A | Higher VRM (5.0 V), lower VCL (9.2 V @ 43.3 A), SMB package (surface-mount) | Requires PCB redesign for SMD placement; better suited for space-constrained consumer electronics | Select when board area is limited and reflow-only assembly is preferred over through-hole |
| P6KE6.8A | Same DO-15 package, higher VRM (6.8 V), higher VCL (11.5 V @ 34.8 A), lower PPP (600 W) | Less sensitive to low-voltage ripple but less effective for tight 5 V rail margins | Select when system tolerates 6.8 V stand-off and requires higher single-pulse energy handling |
Compared with SMBJ5.0A and P6KE6.8A, BZW04-5V8 offers the lowest clamping voltage (10.5 V) at its rated current among DO-15 unidirectional TVS diodes with VRM ≤ 6 V - delivering tighter overvoltage control for 5 V systems without sacrificing thermal endurance.
Availability
BZW04-5V8 is available at Aetrix Electronics and suitable for USB port protection, industrial sensor interface design, and AC/DC adapter secondary-side surge suppression requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZW04-5V8 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.
The BZW04 series belongs to ST's high-reliability TVS portfolio engineered specifically for robust, high-temperature ESD and surge protection in harsh environments - emphasizing thermal stability, low leakage, and compliance with international safety standards.
FAQ
What is the maximum allowable surge current for BZW04-5V8 under IEC 61000-4-4 conditions?
The BZW04-5V8 handles up to 174 A peak pulse current (IPP) under 8/20 µs waveform per IEC 61000-4-4 level 4 (4 kV), with corresponding clamping voltage of 13.4 V. This rating assumes Tj = 25 °C and proper PCB copper area (≥2 cm² per lead) for thermal dissipation.
How does junction temperature affect clamping voltage in BZW04-5V8?
VCL increases linearly with junction temperature using temperature coefficient αT = 5.7 × 10⁻⁴ /°C. At Tj = 125 °C, VCL rises to ~11.7 V (10.5 V × [1 + 0.00057 × (125 − 25)]), remaining within safe limits for 5 V rail protection.
Can BZW04-5V8 be used in bidirectional configurations?
No - BZW04-5V8 is unidirectional. For bidirectional protection at 5.8 V stand-off, use BZW04-5V8B (same package, symmetrical clamping). The "B" suffix denotes bidirectional construction; mixing unidirectional and bidirectional variants in the same design risks incorrect surge path routing.
Is BZW04-5V8 compliant with RoHS and REACH regulations?
Yes - BZW04-5V8 is manufactured in ST's ECOPACK2-compliant facilities and meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Matte tin lead finish and halogen-free epoxy meet IPC-1752A material declaration requirements.
BZW04-5V8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- BZW04, TRANSIL™
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 38A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 3500pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
BZW04-5V8 FAQ
1.How can I place an order for BZW04-5V8 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-5V8 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 BZW04-5V8 reliable?
The price and inventory of BZW04-5V8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-5V8 is usually 5 days.
3.What payment methods are accepted for BZW04-5V8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-5V8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-5V8?
BZW04-5V8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-5V8 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 BZW04-5V8?
For technical support, including BZW04-5V8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-5V8 requirements.
6.How does Aetrix verify that BZW04-5V8 is sourced from the original manufacturer or authorized distributors?
All BZW04-5V8 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 BZW04-5V8 meets industry standards.
7.What is the process for return or replacement of BZW04-5V8?
All BZW04-5V8 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-5V8, 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 BZW04-5V8 part is unused and in its original packaging.
Return procedure for BZW04-5V8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-5V8 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
