My Inquiry
My Account
Vishay General Semiconductor - Diodes Division BZW04-85B-E3/54
- Part No.:
- BZW04-85B-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZW04-85B-E3/54.pdf
- Description:
- TVS DIODE 85.5VWM 137VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,357
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZW04-85B-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for robust overvoltage protection of signal and power lines. It features a 85.5 V standoff voltage (VWM), 95.0–105 V breakdown voltage (VBR) at 1 mA, 137 V clamping voltage (VC) at 2.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the BZW04-85B-E3/54 datasheet, BZW04-85B-E3/54 pinout, BZW04-85B-E3/54 application, or BZW04-85B-E3/54 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-41 mechanical data, clamping performance under surge conditions, and direct alternatives for circuit-level ESD/transient hardening.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, VC, and leakage characteristics across forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, critical for repeatable clamping during repetitive transients.
The device complies with AEC-Q101 for automotive-grade reliability and supports 175 °C maximum junction temperature operation. With 0.106 %/°C temperature coefficient of VBR, its breakdown voltage drift remains tightly controlled across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85.5 V - Maximum continuous operating voltage before conduction begins; defines safe working margin for 72–85 V nominal systems. |
| VBR (min/max) | 95.0 V / 105 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above system overvoltage thresholds. |
| VC @ IPPM | 137 V at 2.9 A - Clamped voltage during 10/1000 μs surge; limits downstream IC stress to sub-140 V level. |
| PPPM | 400 W - Peak pulse power handling per single transient event; sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3. |
| IDRM @ VWM | 1.0 μA - Reverse leakage at rated standoff; negligible power loss and signal integrity impact in high-impedance circuits. |
| TJ max. | 175 °C - Maximum junction temperature; enables use in under-hood automotive environments and thermally constrained PCB layouts. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units, body electronics, and ADAS sensor modules. |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with axial leads; matte tin-plated terminals compliant with J-STD-002 and JESD22-B102 solderability standards. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path terminal | Identical bidirectional conduction; either lead serves as input or return path depending on transient polarity - no orientation dependency in layout. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| 400 W peak pulse power (10/1000 μs) | Withstands automotive load dump and inductive switching surges without degradation or parametric shift. |
| AEC-Q101 qualification | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD-HBM/MM. |
| UL 94 V-0 molding compound | Provides flame-retardant encapsulation essential for safety-critical vehicle subsystems and industrial control cabinets. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes let-through energy to protected ICs - critical for safeguarding 100 V-rated MOSFETs and precision analog front-ends. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from battery dump and alternator ripple in engine compartments. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential signal pair or supply rail to shunt transients before reaching interface IC. Use Value: Maintains signal integrity during 12 V/24 V system surges up to ±137 V, preventing latch-up or permanent damage to automotive-grade transceivers. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise in factory automation. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor at field-side connector entry point, clamping fast-rising spikes before optocoupler or microcontroller input stage. Use Value: Enables >100,000 surge cycles without parameter drift, supporting 15+ year service life in unattended industrial equipment. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHYs and DSL line drivers from lightning-induced surges on outdoor copper lines in telecom access equipment. IC Role / Device Role / Timing Role: First-stage protection device upstream of GDT or MOV, absorbing initial fast-edge energy before slower secondary clamps engage. Use Value: Sub-10 ns response time limits voltage overshoot to <140 V, preserving PHY ICs rated for 100 V absolute maximum ratings. |
Use Scenario: Secondary-side overvoltage clamp on DC output rails of wall adapters powering USB-C PD devices and smart home hubs. IC Role / Device Role / Timing Role: Fail-safe crowbar element that activates only during abnormal open-load or regulator fault conditions exceeding 85 V. Use Value: Prevents catastrophic capacitor rupture and fire hazard by limiting sustained overvoltage to ≤137 V for duration of internal OVP timeout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA | Same 85 V VWM, but SMC (DO-214AB) package; 600 W PPPM; higher IPPM (6.5 A). | Higher power handling suits 24 V industrial buses with larger inductive loads; requires larger PCB footprint. | Select when surge energy exceeds 400 W or board space allows SMC package; not drop-in due to different lead spacing and thermal profile. |
| P6KE85CA | Legacy 600 W TVS in DO-15; wider VBR tolerance (94–106 V); higher VC (139 V); no AEC-Q101 qualification. | Acceptable for commercial-grade power supplies but unsuitable for automotive or mission-critical industrial use. | Choose only for cost-sensitive non-automotive designs where AEC-Q101 is not mandated and 2 V higher clamping is acceptable. |
Compared with SMBJ85CA and P6KE85CA, the BZW04-85B-E3/54 offers AEC-Q101 qualification and DO-41 compatibility in compact through-hole layouts, making it optimal for space-constrained automotive modules where 400 W surge immunity suffices and RoHS-compliant matte tin leads are required.
Availability
BZW04-85B-E3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom line interfaces, and consumer power adapter inputs requiring stable component supply and full traceability.
Supply support for BZW04-85B-E3/54 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 General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and automotive qualification.
The BZW04 series was engineered specifically for high-reliability transient suppression in automotive and industrial environments, balancing clamping precision, surge endurance, and AEC-Q101 compliance in axial-leaded form factors.
FAQ
What is the clamping voltage of BZW04-85B-E3/54 and how does it protect downstream components?
The BZW04-85B-E3/54 clamps to 137 V at 2.9 A peak pulse current (10/1000 μs waveform). This limits transient overvoltage seen by protected ICs - such as CAN transceivers or microcontroller I/O pins - to a safe level below their absolute maximum ratings. Its low clamping ratio (VC/VBR ≈ 1.37) ensures minimal let-through energy, reducing risk of latch-up or gate oxide damage in sensitive silicon.
Is BZW04-85B-E3/54 suitable for automotive applications?
Yes, BZW04-85B-E3/54 is AEC-Q101 qualified and explicitly rated for automotive use. It meets stress test requirements including high-temperature operating life, temperature cycling, and ESD robustness. Its 175 °C maximum junction temperature and DO-41 package with matte tin leads support deployment in engine control units, body control modules, and ADAS sensor assemblies.
What does the "B" suffix indicate in BZW04-85B-E3/54?
The "B" suffix denotes bidirectional configuration - meaning the BZW04-85B-E3/54 conducts identically in both polarities, with matched breakdown (95.0–105 V) and clamping (137 V) characteristics for positive and negative transients. Unlike unidirectional variants, it carries no polarity marking and requires no orientation during PCB assembly.
How does the DO-41 package of BZW04-85B-E3/54 compare to SMC or SMA packages in thermal performance?
The DO-41 package of BZW04-85B-E3/54 provides adequate thermal dissipation for 400 W single-pulse events but has higher thermal resistance than surface-mount SMC packages. Its axial leads allow direct heatsinking via lead bending or chassis mounting, while maintaining compatibility with legacy through-hole assembly processes - ideal for mixed-technology boards where reflow-soldered SMC parts are impractical.
What is the maximum reverse leakage current of BZW04-85B-E3/54 at its standoff voltage?
The BZW04-85B-E3/54 exhibits a maximum reverse leakage current (IDRM) of 1.0 μA at its 85.5 V standoff voltage (VWM) and 25 °C ambient. This ultra-low leakage ensures negligible standby power loss and avoids false triggering in high-impedance sensing circuits, such as those found in battery-monitoring or precision analog signal chains.
BZW04-85B-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 85.5V
- Voltage - Breakdown (Min):
- 95V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 2.9A
- 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)
BZW04-85B-E3/54 FAQ
1.How can I place an order for BZW04-85B-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZW04-85B-E3/54 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 BZW04-85B-E3/54 reliable?
The price and inventory of BZW04-85B-E3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZW04-85B-E3/54 is usually 5 days.
3.What payment methods are accepted for BZW04-85B-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZW04-85B-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZW04-85B-E3/54?
BZW04-85B-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZW04-85B-E3/54 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 BZW04-85B-E3/54?
For technical support, including BZW04-85B-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZW04-85B-E3/54 requirements.
6.How does Aetrix verify that BZW04-85B-E3/54 is sourced from the original manufacturer or authorized distributors?
All BZW04-85B-E3/54 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 BZW04-85B-E3/54 meets industry standards.
7.What is the process for return or replacement of BZW04-85B-E3/54?
All BZW04-85B-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with BZW04-85B-E3/54, 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 BZW04-85B-E3/54 part is unused and in its original packaging.
Return procedure for BZW04-85B-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZW04-85B-E3/54 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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 …
