My Inquiry
My Account
Taiwan Semiconductor Corporation BZW04-11B
- Part No.:
- BZW04-11B
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-11B.pdf
- Description:
- TVS DIODE 11.1VWM 18.2VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,649
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZW04-11B from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, rated for 400W peak pulse power at 10/1000μs, with 11.1V working stand-off voltage, 12.4–13.7V breakdown voltage at 1mA, and 18.2V maximum clamping voltage at 22A peak current. It protects automotive and industrial control circuits against ESD and inductive switching transients.
For engineers reviewing the BZW04-11B datasheet, BZW04-11B pinout, BZW04-11B application, or BZW04-11B equivalent, key selection criteria include clamping voltage margin vs. IC VDD, leakage current at operating bias, thermal derating above 25°C, and AEC-Q101 qualification status for automotive use.
Technical Context
The BZW04-11B operates as a voltage-clamped surge protector using avalanche breakdown. Its bidirectional structure enables symmetrical clamping for AC-coupled or floating signal lines, with typical reverse leakage <5μA at 11.1V and fast response time <1ps to transient events.
It delivers 400W peak pulse power per 10/1000μs waveform, supports junction temperatures from –55°C to +175°C, and exhibits a temperature coefficient of 0.081%/°C for breakdown voltage - critical for stable clamping across automotive thermal ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11.1 V - Maximum continuous reverse voltage before significant leakage; sets upper limit for safe DC bias in protected circuit |
| VBR @ IT=1mA | 12.4–13.7 V - Breakdown onset range; defines minimum voltage at which clamping begins under standardized test condition |
| VC @ IPP=22A | 18.2 V - Clamped voltage during 400W surge; must remain below protected IC's absolute maximum rating |
| PPK | 400 W - Peak pulse power handling at 10/1000μs; determines survivability against lightning or load-dump transients |
| IR @ VWM | <5 μA - Reverse leakage at stand-off voltage; ensures minimal power loss and signal integrity in high-impedance nodes |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood automotive environments without thermal shutdown |
Pinout & Package
Package: DO-204AL (DO-41), axial lead, epoxy-molded case with UL 94V-0 flammability rating and pure tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in forward conduction | For unidirectional variants only; BZW04-11B is bidirectional - both terminals function identically under reverse/forward surge |
| Cathode (banded end) | Current exit terminal in forward conduction | Band denotes polarity for unidirectional types; absent functional distinction in BZW04-11B due to symmetric bidirectional construction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option available | Enables direct use in automotive ECUs without additional qualification testing - BZW04-11BH variant meets stress test requirements for temperature cycling, HTRB, and ESD |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure during surge - 18.2V clamp at 12.4V min VBR provides tight protection margin for 12V rail systems |
| Ultra-low leakage (<5μA @ VWM) | Preserves battery life in always-on automotive modules and avoids false triggering in high-impedance sensor interfaces |
| 400W peak pulse power (10/1000μs) | Withstands ISO 7637-2 Pulse 1 (inductive switch-off) and IEC 61000-4-5 Combination Wave surges up to 4kV/2Ω |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller GPIOs from load-dump and jump-start transients in vehicle door modules. IC Role / Device Role: Bidirectional clamping element placed between signal line and chassis ground, shunting surge energy away from sensitive analog front-end. Use Value: 18.2V clamping ensures transceiver VCC (typically 5V or 12V) remains within safe operating area during 12V system surges up to ±100V. | Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers exposed to relay coil flyback and field wiring EFT. IC Role / Device Role: Primary overvoltage clamp on input node, coordinated with series current-limiting resistor and optocoupler isolation barrier. Use Value: 400W surge rating handles repetitive 24V inductive spikes without degradation; <5μA leakage prevents false logic state detection. |
| LED Driver Power Supply Input | USB-C Port ESD Protection |
Use Scenario: Suppressing line-to-line and line-to-ground transients on 12–48V DC input rails of constant-current LED drivers used in street lighting. IC Role / Device Role: Secondary-level TVS placed after bulk capacitor and before primary-side controller IC, complementing upstream MOVs. Use Value: 175°C max junction temperature allows reliable operation inside thermally constrained outdoor enclosures with ambient up to 85°C. | Use Scenario: Providing board-level ESD immunity on USB-C CC and VCONN lines where space-constrained layout prohibits multi-stage protection. IC Role / Device Role: Standalone bidirectional clamp with low capacitance (<100pF), mounted directly at connector footprint. Use Value: Symmetric 11.1V stand-off enables protection of both positive and negative ESD events (±15kV contact per IEC 61000-4-2) without polarity concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA (Bourns) | Same DO-214AA package; 11.1V VWM, 18.2V VC @ 22.5A, but rated for 600W peak power | Higher surge capacity suits more severe industrial environments; larger package requires PCB rework | Select SMBJ11CA when 600W surge headroom is required and DO-214AA footprint is acceptable |
| P6KE11CA (Littelfuse) | DO-15 package; identical 11.1V VWM and 18.2V VC, but lower 600W rating and higher leakage (~10μA) | Legacy through-hole alternative; less suitable for high-reliability automotive due to non-AEC-Q101 status | Choose P6KE11CA only for cost-sensitive, non-automotive designs where DO-15 mounting is preferred |
Compared with SMBJ11CA and P6KE11CA, the BZW04-11B offers AEC-Q101 qualification in compact DO-41 packaging, tighter leakage (<5μA), and optimized thermal resistance (RθJA = 100°C/W) - making it preferable for space-constrained, thermally demanding automotive modules.
Availability
BZW04-11B is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and LED driver input surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for BZW04-11B 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 MOSFETs, with global distribution and AEC-Q101-compliant production lines.
The BZW04 series was designed specifically for robust, high-energy transient suppression in automotive and industrial environments - emphasizing low clamping ratio, high-temperature reliability, and qualification-grade consistency across voltage variants like BZW04-11B.
FAQ
What is the polarity configuration of BZW04-11B?
BZW04-11B is a bidirectional TVS diode, meaning it has no designated anode or cathode for surge suppression - both terminals behave identically under positive or negative transients. Unlike unidirectional variants (e.g., BZW04-11), it lacks a cathode band marking and is intended for AC-coupled or floating signal lines where polarity reversal may occur.
Does BZW04-11B meet AEC-Q101 qualification?
The base BZW04-11B part is not AEC-Q101 qualified; however, the variant BZW04-11BH (with "H" suffix) is fully AEC-Q101 certified. This qualification covers temperature cycling, high-temperature reverse bias, and ESD testing per stress test conditions defined in the standard - essential for automotive under-hood applications.
What is the maximum clamping voltage of BZW04-11B at its rated peak current?
The maximum clamping voltage (VC) of BZW04-11B is 18.2 V at a peak pulse current (IPP) of 22.0 A, measured under the standard 10/1000μs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the highest voltage seen by downstream circuitry during a 400W transient event.
How does BZW04-11B compare to BZW04-11 in terms of electrical performance?
BZW04-11B and BZW04-11 share identical VWM (11.1 V), VBR (12.4–13.7 V), VC (18.2 V), and PPK (400 W) specifications. The "B" suffix denotes bidirectional construction, while "no-B" indicates unidirectional. Their clamping behavior, surge capability, and thermal ratings are otherwise identical - only polarity configuration differs.
What is the junction-to-ambient thermal resistance of BZW04-11B on a standard PCB?
The junction-to-ambient thermal resistance (RθJA) of BZW04-11B is 100°C/W when mounted on a printed circuit board with 10 mm lead length, per manufacturer characterization. This value assumes standard FR-4 substrate and influences steady-state power dissipation limits - for example, at 25°C ambient, max continuous power is ~1 W before exceeding 175°C junction temperature.
BZW04-11B 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 11.1V
- Voltage - Breakdown (Min):
- 12.4V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 22A
- 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)
BZW04-11B FAQ
1.How can I place an order for BZW04-11B through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-11B 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 BZW04-11B reliable?
The price and inventory of BZW04-11B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-11B is usually 5 days.
3.What payment methods are accepted for BZW04-11B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-11B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-11B?
BZW04-11B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-11B 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 BZW04-11B?
For technical support, including BZW04-11B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-11B requirements.
6.How does Aetrix verify that BZW04-11B is sourced from the original manufacturer or authorized distributors?
All BZW04-11B 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 BZW04-11B meets industry standards.
7.What is the process for return or replacement of BZW04-11B?
All BZW04-11B units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-11B, 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 BZW04-11B part is unused and in its original packaging.
Return procedure for BZW04-11B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-11B 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…
