My Inquiry
My Account
Taiwan Semiconductor Corporation BZW04-44
- Part No.:
- BZW04-44
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-44.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,556
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZW04-44 from Taiwan Semiconductor is a unidirectional transient voltage suppressor diode designed for high-energy surge protection in DC power rails and signal lines. It features a 43.6 V working stand-off voltage, 48.5–53.6 V breakdown voltage at 1 mA, 70.1 V maximum clamping voltage at 5.7 A peak pulse current, and 400 W peak pulse power rating per 10/1000 μs waveform - deployed in automotive lighting control and industrial sensor interface circuits.
For engineers reviewing the BZW04-44 datasheet, BZW04-44 pinout, BZW04-44 application, or BZW04-44 equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, leakage current below 1 μA at 43.6 V, thermal derating above 25°C ambient, and DO-41 package compatibility with manual or wave-solder assembly.
Technical Context
The BZW04-44 operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its specified VBR range (48.5–53.6 V). Its low dynamic impedance ensures rapid voltage clamping during transients such as ISO 7637-2 pulse 1/2a/5a or IEC 61000-4-5 surges.
Thermal performance is defined by RθJL = 60°C/W and RθJA = 100°C/W on PCB with 10 mm lead length; junction temperature must remain within −55°C to +175°C across operation and storage. The device meets AEC-Q101 stress test requirements when ordered with "H" suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - Maximum continuous reverse operating voltage before leakage rises significantly; sets upper limit for protected circuit DC rail. |
| VBR @ 1 mA | 48.5–53.6 V - Breakdown onset range; defines minimum overvoltage threshold for clamping activation. |
| VC @ IPP | 70.1 V at 5.7 A - Clamped voltage under 10/1000 μs surge; determines worst-case stress on downstream components. |
| PPK | 400 W - Peak non-repetitive surge power handling; validates immunity to automotive load dump or inductive kick events. |
| IR @ VWM | <1 μA - Reverse leakage at stand-off voltage; ensures negligible standby power loss and signal integrity in high-impedance nodes. |
| TJ max | +175°C - Maximum junction temperature; supports operation in under-hood automotive or enclosed industrial enclosures. |
| Package | DO-204AL (DO-41) - Axial-leaded through-hole package with tin-plated leads; compatible with legacy PCB layouts and reflow/wave soldering. |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode indicated by band marking. Leads are pure tin-plated and solderable per J-STD-002; weight ≈ 0.300 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration. |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 48 V supply rail); conducts avalanche current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W surge capability | Validates robustness against ISO 7637-2 Pulse 5a (load dump) up to 120 V/100 ms in 12 V systems. |
| Clamping voltage ≤ 70.1 V | Ensures protected 48 V-rated ICs (e.g., CAN transceivers, motor drivers) remain within absolute maximum ratings during surge. |
| Leakage < 1 μA at 43.6 V | Minimizes quiescent current draw in always-on battery-powered modules (e.g., telematics, ECU wake-up circuits). |
| AEC-Q101 qualified option | Available as BZW04-44H - certified for automotive under-hood applications including engine control and lighting modules. |
| DO-41 mechanical standardization | Enables drop-in replacement of legacy TVS diodes (e.g., P6KE48A) without footprint redesign. |
Applications
| Automotive LED Headlamp Driver Protection | Industrial 48 V DC Power Rail Clamp |
|---|---|
Use Scenario: Protects LED driver ICs and MOSFETs from load dump transients during vehicle battery disconnect/reconnect events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48 V rail and chassis ground to clamp spikes up to 120 V. Use Value: Limits clamped voltage to 70.1 V, preserving gate oxide integrity of 75 V-rated power FETs and preventing latch-up in driver ICs. | Use Scenario: Shields programmable logic controllers (PLCs) and I/O modules from inductive switching surges on 48 V backplane supplies. IC Role / Device Role / Timing Role: Standoff-connected TVS absorbing energy from relay coil flyback or solenoid de-energization. Use Value: Withstands 5.7 A peak impulse current while maintaining sub-1 μA leakage - avoids false triggering in precision analog input stages. |
| ESD-Sensitive Sensor Interface Protection | Electrical Fast Transient (EFT) Immunity for CAN Nodes |
Use Scenario: Safeguards automotive ambient light sensors and Hall-effect position sensors connected to long harnesses exposed to ISO 10605 ESD. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100 pF at VWM) placed at connector entry point to shunt ESD current away from ADC inputs. Use Value: Sub-μA leakage preserves sensor bias stability; fast response time (<1 ns) prevents ESD-induced digital upset in microcontroller peripherals. | Use Scenario: Enhances immunity of CAN FD transceivers (e.g., TJA1057) to IEC 61000-4-4 EFT bursts on vehicle body networks. IC Role / Device Role / Timing Role: TVS installed on CAN_H/CAN_L differential pair to clamp common-mode transients without distorting signal integrity. Use Value: 70.1 V clamping ensures transceiver common-mode range (±36 V) is not exceeded during 4 kV EFT bursts, maintaining bus arbitration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse P6KE48A | Same DO-41 package; 48 V VWM, 70 V VC @ 5.7 A; 600 W PPK; higher leakage (~5 μA @ 48 V) | Higher surge rating but less suitable for ultra-low-power wake-up circuits due to elevated leakage | Select P6KE48A only if higher peak power margin is required and leakage tolerance >5 μA exists. |
| Vishay 1.5KE48A | DO-201 package (larger); identical VWM/VC specs; 1500 W PPK; requires PCB footprint change | Not pin-compatible; suited for higher-energy industrial surge environments where space allows larger case | Choose 1.5KE48A only when upgrading from BZW04-44 for enhanced surge endurance and thermal mass is available. |
Compared with P6KE48A and 1.5KE48A, the BZW04-44 offers tighter leakage control (<1 μA), AEC-Q101 qualification path (via "H" variant), and DO-41 footprint compatibility - making it optimal for space-constrained, low-quiescent automotive and industrial modules requiring verified reliability.
Availability
BZW04-44 is available at Aetrix Electronics and suitable for automotive lighting control, industrial 48 V power distribution, and ESD-sensitive sensor interface designs requiring stable component supply, consistent parametric performance, and traceable sourcing.
Supply support for BZW04-44 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and thyristors - headquartered in Hsinchu, Taiwan.
The BZW04 series is part of TSC's AEC-Q101-qualified transient suppression portfolio, engineered specifically for automotive and industrial applications demanding high surge robustness, low leakage, and reliable DO-41 form factor integration.
FAQ
What is the maximum clamping voltage of the BZW04-44 under a 10/1000 μs surge?
The BZW04-44 has a maximum clamping voltage (VC) of 70.1 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 5.7 A. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream components like 75 V-rated MOSFETs remain within safe operating limits during surge events. The BZW04-44 maintains this clamping performance across its full operating temperature range.
Is the BZW04-44 suitable for bidirectional transient protection?
No - the BZW04-44 is a unidirectional TVS diode, intended for DC rail protection where polarity is fixed. For bidirectional applications (e.g., AC lines or differential buses), the BZW04-44B variant must be used. The BZW04-44 itself has a cathode band marking and conducts only in reverse breakdown; using it in bidirectional configurations risks failure during positive half-cycles.
Does the BZW04-44 meet automotive qualification standards?
The base BZW04-44 is not AEC-Q101 qualified; however, the BZW04-44H variant - identifiable by the "H" suffix in the ordering code - is fully AEC-Q101 tested and certified for automotive use. This includes stress testing for temperature cycling, humidity, mechanical shock, and accelerated life. Always specify BZW04-44H for under-hood or safety-critical automotive deployments.
What is the reverse leakage current of the BZW04-44 at its working voltage?
At its working stand-off voltage (VWM) of 43.6 V and ambient temperature of 25°C, the BZW04-44 exhibits a maximum reverse leakage current (IR) of 1 μA. This ultra-low leakage supports energy-efficient designs, especially in always-on automotive modules where cumulative current draw across multiple TVS devices must remain minimal.
Can the BZW04-44 replace older P6KE-series TVS diodes in existing designs?
Yes - the BZW04-44 is mechanically and electrically compatible with P6KE48A in DO-41 footprint designs, sharing identical VWM (43.6 V vs. 48 V), VC (70.1 V), and IPP (5.7 A). However, the BZW04-44 offers lower leakage (<1 μA vs. ~5 μA) and optional AEC-Q101 qualification. No PCB changes are needed, but verify layout thermal relief and surge path impedance match original design intent.
BZW04-44 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- BZW04
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 5.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
BZW04-44 FAQ
1.How can I place an order for BZW04-44 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-44 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 BZW04-44 reliable?
The price and inventory of BZW04-44 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-44 is usually 5 days.
3.What payment methods are accepted for BZW04-44?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-44 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-44?
BZW04-44 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-44 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 BZW04-44?
For technical support, including BZW04-44 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-44 requirements.
6.How does Aetrix verify that BZW04-44 is sourced from the original manufacturer or authorized distributors?
All BZW04-44 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 BZW04-44 meets industry standards.
7.What is the process for return or replacement of BZW04-44?
All BZW04-44 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-44, 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 BZW04-44 part is unused and in its original packaging.
Return procedure for BZW04-44:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-44 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
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
