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Vishay General Semiconductor - Diodes Division SMBJ54CAHM3/I
- Part No.:
- SMBJ54CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54CAHM3/I.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,454
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Product details
Overview
SMBJ54CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. 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), 87.1 V maximum clamping voltage (VC) at 6.9 A, and operates across -55 °C to +150 °C junction temperature range - used in industrial sensor interface protection and automotive ECU power rail surge suppression.
For engineers reviewing the SMBJ54CAHM3/I datasheet, SMBJ54CAHM3/I pinout, SMBJ54CAHM3/I application, or SMBJ54CAHM3/I equivalent, this part delivers verified bidirectional clamping performance with halogen-free RoHS-compliant construction, AEC-Q101 qualification, and MSL Level 1 moisture sensitivity - critical for high-reliability embedded power and signal line protection design.
Technical Context
This device functions as a voltage-clamping protector with symmetrical bidirectional avalanche behavior, enabling transient suppression on AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 20 °C/W junction-to-lead thermal resistance supports sustained surge handling under PCB pad-limited thermal conditions.
The SMBJ54CAHM3/I meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 surge waveform standards. Its 0.057 %/°C VBR temperature coefficient ensures predictable clamping voltage drift over temperature, and its 100 A IFSM rating (unidirectional only) is not applicable due to bidirectional configuration - confirming exclusive use in reverse/forward symmetric transient scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before significant conduction begins; defines safe working margin below clamping threshold. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Confirmed breakdown range ensuring reliable avalanche initiation during overvoltage events. |
| VC @ IPPM | 87.1 V at 6.9 A - Clamped voltage under 600 W 10/1000 µs surge; determines maximum stress imposed on downstream circuitry. |
| PPPM | 600 W - Peak pulse power handling capability per standard 10/1000 µs waveform; defines transient energy absorption capacity. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or industrial ambient environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.220" x 0.155" footprint; compatible with automated placement and reflow soldering. |
| Compliance | AEC-Q101 qualified, halogen-free, RoHS-compliant - meets automotive reliability and environmental requirements for production deployment. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - both terminals are electrically symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction terminal | No functional distinction between terminals; either end connects to protected line or ground - enables flexible layout in AC or differential signal paths. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 3/4 surges without derating on standard 5 mm × 5 mm copper pads. |
| Bidirectional clamping symmetry | Eliminates need for polarity-aware routing in RS-485, CAN, or Ethernet PHY protection - reduces layout complexity and BOM count. |
| AEC-Q101 qualification (HM3 suffix) | Validated for automotive powertrain and body electronics applications requiring extended temperature cycling and humidity exposure reliability. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure risk. |
| UL 497B recognized (QVGQ2) | Meets safety agency requirements for telecom and industrial equipment surge protection modules without additional certification overhead. |
Applications
| Industrial Sensor Interface Protection | Automotive Power Distribution Module |
|---|---|
|
Use Scenario: Protecting 24 V CAN FD signal lines in factory automation PLC I/O modules from inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between CAN_H/CAN_L and chassis ground to limit common-mode surges to <87.1 V. Use Value: Prevents damage to ISO 11898-2 transceivers during 100 V/1 A load dump simulations while maintaining signal integrity via low capacitance (<100 pF). |
Use Scenario: Safeguarding 12 V auxiliary power rails feeding infotainment head units during battery jump-start events. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing >600 W surge energy within 10 µs rise time to hold rail voltage below IC absolute maximum ratings. Use Value: Enables compliance with ISO 7637-2 Pulse 5a (load dump) without upstream DC-DC converter shutdown or latch-up. |
| Telecom DSL Line Card Surge Protection | Consumer Appliance Motor Drive Control |
|
Use Scenario: Shielding ADSL/VDSL line drivers from lightning-induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Primary clamping device on line-side transformer secondary, coordinated with GDT and MOV for multi-stage protection. Use Value: Limits let-through voltage to <90 V during 10/700 µs telecom surges, preserving ±12 V op-amp front-end stages and ADC inputs. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart washing machine control boards. IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp inductive kickback to 87.1 V, protecting H-bridge MOSFETs and gate drivers. Use Value: Extends MOSFET lifetime by reducing VDS stress during 100 A turn-off events, validated per IEC 61000-4-4 EFT testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54CAHE3/I | Same electrical specs, RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Restricted to commercial-grade industrial or consumer applications where automotive reliability is not required. | Select when cost sensitivity outweighs halogen-free or automotive qualification needs. |
| SMCJ54CAHM3/I | Same VWM/VBR/VC, but SMC (DO-214AB) package - 25 % larger footprint and higher thermal mass. | Preferred for higher average power dissipation or legacy board layouts with SMC pad patterns. | Choose when board space allows larger package and enhanced thermal performance is prioritized over miniaturization. |
Compared with SMBJ54CAHM3/I, the HE3/I variant trades halogen-free construction and AEC-Q101 validation for lower unit cost, while the SMCJ54CAHM3/I offers superior thermal derating at the expense of PCB area - making SMBJ54CAHM3/I optimal for space-constrained automotive and industrial designs requiring full compliance.
Availability
SMBJ54CAHM3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, and telecom line card designs requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMBJ54CAHM3/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets high-energy transient suppression in compact surface-mount formats, engineered for automotive, industrial, and telecom systems where robustness, small footprint, and regulatory compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ54CAHM3/I at its rated peak pulse current?
The SMBJ54CAHM3/I has a maximum clamping voltage (VC) of 87.1 V at its peak pulse current (IPPM) of 6.9 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events - a critical parameter for ensuring downstream ICs remain within their absolute maximum ratings. The SMBJ54CAHM3/I maintains this clamping performance across its full operating temperature range.
Is SMBJ54CAHM3/I suitable for automotive applications?
Yes, SMBJ54CAHM3/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - explicitly intended for automotive powertrain, body electronics, and infotainment systems. Its -55 °C to +150 °C operating junction temperature range, MSL Level 1 reflow compatibility, and UL 497B recognition confirm suitability for under-hood and dashboard-mounted modules. The HM3 suffix denotes full automotive-grade construction, distinguishing it from commercial variants like SMBJ54CA-E3/I.
How does the bidirectional configuration of SMBJ54CAHM3/I affect its circuit implementation?
The SMBJ54CAHM3/I has symmetrical bidirectional avalanche characteristics, meaning both terminals function identically - no cathode band or polarity marking is present. This allows direct placement across AC-coupled lines (e.g., RS-485, CAN, Ethernet), between differential pairs, or from signal to ground without orientation constraints. Unlike unidirectional TVS diodes, SMBJ54CAHM3/I clamps equally in both directions, eliminating risk of incorrect installation and simplifying layout for noise-sensitive analog or high-speed digital interfaces.
What is the thermal resistance profile of SMBJ54CAHM3/I, and how does it impact surge handling?
The SMBJ54CAHM3/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads. This low RθJL enables efficient heat transfer during short-duration 10/1000 µs surges, sustaining its 600 W peak pulse rating without thermal runaway. However, for repetitive surge conditions, board-level copper area and thermal vias must be optimized - the SMBJ54CAHM3/I's thermal design assumes minimum recommended pad layout per Vishay specification 88392.
Does SMBJ54CAHM3/I meet UL safety certification requirements?
Yes, SMBJ54CAHM3/I carries Underwriters Laboratories recognition under UL 497B (QVGQ2) for both unidirectional and bidirectional protectors, with file number E136766. This certification validates its performance in telecom and industrial surge protection applications, covering dielectric withstand, flammability (UL 94 V-0 molding compound), and long-term reliability under repeated transient stress. The UL listing applies directly to the SMBJ54CAHM3/I device - no additional system-level testing is required to claim compliance when used per datasheet guidelines.
SMBJ54CAHM3/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:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ54CAHM3/I FAQ
1.How can I place an order for SMBJ54CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54CAHM3/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 SMBJ54CAHM3/I reliable?
The price and inventory of SMBJ54CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ54CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54CAHM3/I?
SMBJ54CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54CAHM3/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 SMBJ54CAHM3/I?
For technical support, including SMBJ54CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54CAHM3/I requirements.
6.How does Aetrix verify that SMBJ54CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ54CAHM3/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 SMBJ54CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ54CAHM3/I?
All SMBJ54CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54CAHM3/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 SMBJ54CAHM3/I part is unused and in its original packaging.
Return procedure for SMBJ54CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ54CAHM3/I Tags
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