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Vishay General Semiconductor - Diodes Division SMBJ54CAHE3_A/I
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- Part No.:
- SMBJ54CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54CAHE3_A/I.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
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Product details
Overview
SMBJ54CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 54 V standoff voltage (VWM), 60.0–66.3 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 87.1 V at 6.9 A, and operates across -55 °C to +150 °C junction temperature range - deployed in industrial sensor signal lines and automotive ECUs.
For engineers reviewing the SMBJ54CAHE3_A/I datasheet, SMBJ54CAHE3_A/I pinout, SMBJ54CAHE3_A/I application, or SMBJ54CAHE3_A/I equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, clamping performance under surge conditions, thermal resistance data, and real-world use context for ESD/lightning transient suppression in bidirectional signal paths.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ps) and low incremental surge resistance. Its symmetrical I-V characteristics enable identical clamping behavior in both polarities, making it suitable for AC-coupled or floating signal lines where polarity reversal may occur.
The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, supports automated SMT placement, and is qualified to AEC-Q101 for automotive applications. Its 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design (0.2" × 0.2") to sustain repetitive surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before significant leakage; defines upper limit for safe signal swing in protected circuit. |
| VBR min/max | 60.0 V / 66.3 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above normal operating transients but below IC damage thresholds. |
| VC @ IPPM | 87.1 V at 6.9 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream components during transient events. |
| PPPM | 600 W - Peak pulse power handling capability; enables suppression of high-energy lightning-induced surges per IEC 61000-4-5. |
| IPPM | 6.9 A - Peak surge current supported at rated clamping voltage; directly constrains minimum series impedance required in protection network. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive environments and industrial enclosures without derating. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; mandates ≥5.0 mm × 5.0 mm copper pads per terminal for sustained power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common node in bidirectional conduction path | Connected to line being protected; forms symmetrical clamp path with cathode during either polarity surge. |
| Cathode | Current exit point in forward bias; common node in bidirectional conduction path | Connected to reference (e.g., ground or VCC); completes low-impedance surge shunt path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock - enables direct use in engine control units and ADAS sensors. |
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without external current limiting beyond standard series impedance. |
| Bidirectional symmetry | Identical VBR, VC, and IPPM in both directions - eliminates need for polarity-aware layout in differential or AC-coupled interfaces like CAN FD or RS-485. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during fast transients - critical for protecting 3.3 V or 5 V logic interfaces with tight absolute maximum ratings. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume automated assembly using JEDEC-standard 260 °C peak profile. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal and ground to divert surge energy away from ADC input or op-amp buffer. Use Value: Maintains signal integrity during 100 V/50 ms load dump events by clamping to ≤87.1 V, preventing latch-up or permanent damage to 5 V rail-referenced front-end circuitry. |
Use Scenario: Shielding half-duplex RS-485 transceivers (e.g., SN65HVD230) from ESD and induced lightning surges on long cable runs in factory automation. IC Role / Device Role / Timing Role: Symmetrical TVS pair (A/B lines to GND) providing low-capacitance (<50 pF), fast-response overvoltage protection without distorting 10 Mbps differential signaling. Use Value: Enables compliance with IEC 61000-4-2 (±15 kV contact) and IEC 61000-4-5 (2 kV line-earth) while preserving signal edge fidelity due to sub-nanosecond response. |
| Consumer USB Port ESD Protection | Telecom DSL Line Protection |
|
Use Scenario: Safeguarding USB 2.0 D+/D− lines in set-top boxes against human-body-model (HBM) ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Bidirectional clamp between differential pair and chassis ground, placed immediately adjacent to connector to minimize inductance. Use Value: Limits transient voltage to <90 V during ±8 kV HBM discharge, preventing gate oxide rupture in USB PHY transceivers while adding <0.5 pF parasitic capacitance per line. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers against lightning-induced surges entering via outdoor copper pairs in residential gateways. IC Role / Device Role / Timing Role: Primary surge suppressor mounted at line interface connector, shunting common-mode surges to earth ground before reaching transformer or codec IC. Use Value: Withstands repeated 10/1000 µs surges up to 600 W, enabling >100,000 surge cycles per ITU-T K.20/K.21 requirements without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54CAHM3_A/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and thermal performance. | No difference in circuit design or layout; selected when halogen-free compliance is mandated by OEM environmental policy. | Choose SMBJ54CAHM3_A/I if RoHS + halogen-free certification is required; otherwise SMBJ54CAHE3_A/I offers standard commercial-grade compliance. |
| SMAJ54CAHE3_A/I | Lower 400 W peak pulse power (vs. 600 W), higher RθJA (150 °C/W), smaller SMA package (DO-214AC); otherwise matches VWM, VBR, and VC. | Not suitable for high-energy surges (e.g., IEC 61000-4-5 Level 4); limited to consumer-grade or low-risk industrial applications. | Select SMBJ54CAHE3_A/I when 600 W surge handling and automotive qualification are mandatory; SMAJ54CAHE3_A/I fits space-constrained designs with lower surge exposure. |
Compared with SMBJ54CAHM3_A/I, SMBJ54CAHE3_A/I provides identical protection performance with standard RoHS compliance; versus SMAJ54CAHE3_A/I, it delivers 50% higher surge power rating and superior thermal management - critical for mission-critical automotive and industrial deployments.
Availability
SMBJ54CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 interface hardening, and telecom DSL line safeguarding requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMBJ54CAHE3_A/I 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and high-volume manufacturability.
The SMBJ series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure - engineered for AEC-Q101 compliance, robust surge handling, and seamless SMT integration into demanding environments.
FAQ
What is the clamping voltage of SMBJ54CAHE3_A/I at its rated peak pulse current?
The SMBJ54CAHE3_A/I has a maximum clamping voltage (VC) of 87.1 V at its peak pulse current (IPPM) of 6.9 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMBJ54CAHE3_A/I maintains this clamping performance in both directions due to its bidirectional construction.
Is SMBJ54CAHE3_A/I qualified for automotive applications?
Yes, SMBJ54CAHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88392 (Revision 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature operating life, and ESD robustness - validating its suitability for under-hood and body-control module applications. The SMBJ54CAHE3_A/I meets automotive-grade reliability requirements without derating.
What is the standoff voltage (VWM) and why does it matter for SMBJ54CAHE3_A/I?
The standoff voltage (VWM) of SMBJ54CAHE3_A/I is 54 V - the maximum DC or continuous peak reverse voltage the device can withstand without entering avalanche conduction. This parameter ensures the SMBJ54CAHE3_A/I remains non-conductive during normal operation, avoiding leakage or power loss, while still triggering reliably during transients exceeding this threshold. It must be selected ≥10–20% above the system's maximum operating voltage.
How does the SMBJ54CAHE3_A/I package differ from SMAJ or SMCJ variants?
SMBJ54CAHE3_A/I uses the SMB (DO-214AA) package - measuring 4.57 mm × 3.94 mm × 2.20 mm - offering higher power handling (600 W) than SMAJ (400 W, DO-214AC) and lower profile than SMCJ (1500 W, DO-214AB). Its 100 °C/W RθJA requires 5.0 mm × 5.0 mm copper pads, unlike SMAJ's 150 °C/W. The SMBJ54CAHE3_A/I balances surge capacity, board space, and thermal performance for mid-tier protection needs.
Can SMBJ54CAHE3_A/I be used in bidirectional signal lines like CAN or RS-485?
Yes, SMBJ54CAHE3_A/I is explicitly designed for bidirectional applications, as indicated by the "CA" suffix and confirmed in Vishay's documentation stating "Electrical characteristics apply in both directions." Its symmetrical VBR, VC, and IPPM make it ideal for protecting differential buses such as CAN FD or RS-485, where voltage transients may appear with either polarity relative to ground. No polarity marking is present on the SMBJ54CAHE3_A/I package.
SMBJ54CAHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ54CAHE3_A/I FAQ
1.How can I place an order for SMBJ54CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54CAHE3_A/I 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 SMBJ54CAHE3_A/I reliable?
The price and inventory of SMBJ54CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ54CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54CAHE3_A/I?
SMBJ54CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54CAHE3_A/I 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 SMBJ54CAHE3_A/I?
For technical support, including SMBJ54CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ54CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ54CAHE3_A/I 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 SMBJ54CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ54CAHE3_A/I?
All SMBJ54CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54CAHE3_A/I, 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 SMBJ54CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ54CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ54CAHE3_A/I Tags
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