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Vishay General Semiconductor - Diodes Division SMBJ54CAHM3/H
- Part No.:
- SMBJ54CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54CAHM3/H.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,324
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Product details
Overview
SMBJ54CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection on signal and power lines. It features a 54 V standoff voltage (VWM), 60.0–66.3 V breakdown range (VBR at 1 mA), 87.1 V maximum clamping voltage (VC) at 6.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial sensor interfaces and automotive ECUs.
For engineers reviewing the SMBJ54CAHM3/H datasheet, SMBJ54CAHM3/H pinout, SMBJ54CAHM3/H application, or SMBJ54CAHM3/H equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling precise voltage limiting during ESD or lightning-induced surges.
The device is rated for repetitive 10/1000 µs transients at 0.01% duty cycle and supports continuous operation from −55 °C to +150 °C junction temperature. Its SMB package provides 5.0 mm × 5.0 mm copper pad thermal dissipation capability and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin below clamping threshold. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Verified breakdown onset range; ensures predictable turn-on within ±5% tolerance under standardized test conditions. |
| VC @ IPPM | 87.1 V at 6.9 A - Measured clamping voltage during 10/1000 µs surge; limits downstream IC stress to sub-90 V during 600 W transient events. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; supports high-energy transients common in automotive load-dump and inductive switching. |
| IPPM | 6.9 A - Peak pulse current corresponding to VC; directly determines PCB trace sizing and fuse coordination for surge paths. |
| TJ max. | +150 °C - Maximum junction temperature; enables reliable operation in under-hood automotive or sealed industrial enclosures without derating. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm pads; informs heatsinking requirements for sustained surge repetition. |
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 compliant with J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (negative polarity) | Accepts reverse surge current during negative transients; forms symmetrical conduction path with cathode. |
| Cathode | Transient current entry point (positive polarity) | Accepts forward surge current during positive transients; completes bidirectional clamping loop with anode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC performance in both directions - eliminates need for polarity-aware layout in AC-coupled or floating signal lines. |
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant | HM3 suffix denotes halogen-free molding compound and full RoHS compliance - satisfies EU ELV and OEM environmental mandates. |
| 600 W 10/1000 µs rating | Withstands high-energy transients from inductive load switching (e.g., solenoids, relays) without degradation over rated lifetime. |
| MSL Level 1 | Moisture sensitivity level 1 per J-STD-020 - allows unlimited floor life and reflow at peak 260 °C without baking preconditioning. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs against load-dump and jump-start transients in vehicle door modules and seat controllers. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between bus line and transceiver pin to limit excursion beyond absolute maximum ratings. Use Value: Maintains signal integrity by clamping transients to ≤87.1 V while surviving repeated 600 W surges - extends transceiver MTBF in 12 V systems. |
Use Scenario: Safeguarding RS-485/CAN FD physical layer drivers in factory automation PLCs exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) TVS placed differential-line-to-ground to suppress common-mode surges without distorting data edges. Use Value: Enables >1 Mbps data rates by limiting junction capacitance and maintaining fast response time - prevents bit errors during EFT bursts. |
| Consumer Power Adapter Input | Telecom DSL Line Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 5–24 V DC outputs of wall adapters subjected to capacitor discharge and hot-plug events. IC Role / Device Role / Timing Role: Standoff-rated (54 V) clamp shunting transient energy to ground before it reaches LDOs or USB-PD controllers. Use Value: Prevents latch-up and permanent damage to downstream PMICs by clamping within 1 ns - validated per IEC 61000-4-5 Level 3. |
Use Scenario: Primary protection on POTS/DSL line cards where asymmetric surges from lightning induction require symmetrical clamping. IC Role / Device Role / Timing Role: Bidirectional TVS installed line-to-line and line-to-ground to absorb longitudinal and transverse mode surges simultaneously. Use Value: Achieves <100 V clamping across full surge spectrum - meets GR-1089-CORE telecom immunity requirements for central office equipment. |
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/H | Same electrical specs and SMB package; RoHS-compliant but not halogen-free; lacks JESD201 Class 2 whisker rating. | Approved for commercial-grade industrial use but excluded from automotive AEC-Q101 programs requiring halogen-free materials. | Select when cost-sensitive non-automotive designs prioritize RoHS compliance over halogen-free or whisker resistance. |
| SMCJ54CAHM3 | Higher 1500 W PPPM rating in larger SMC (DO-214AB) package; identical VWM/VC but 12.5 A IPPM. | Used where higher surge margin is required (e.g., outdoor telecom cabinets), but requires PCB area increase and thermal redesign. | Choose only if system-level surge testing exceeds 600 W - otherwise SMBJ54CAHM3/H offers optimal size/power balance. |
Compared with SMBJ54CAHE3/H, SMBJ54CAHM3/H adds halogen-free construction and whisker resistance for automotive qualification; versus SMCJ54CAHM3, it trades 2.5× surge capacity for 40% smaller footprint and lower RθJA, making it ideal for space-constrained AEC-Q101 designs.
Availability
SMBJ54CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus interface, and consumer power adapter input applications requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for SMBJ54CAHM3/H 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 board-level transient suppression in automotive, industrial, and telecom systems - engineered for fast response, repeatable clamping, and robust thermal performance in compact surface-mount packages.
FAQ
What is the clamping voltage of SMBJ54CAHM3/H at its rated peak pulse current?
The SMBJ54CAHM3/H has a maximum clamping voltage (VC) of 87.1 V at 6.9 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ54CAHM3/H maintains this clamping performance bidirectionally, ensuring consistent protection regardless of transient polarity.
Is SMBJ54CAHM3/H qualified for automotive applications?
Yes, SMBJ54CAHM3/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88392. It undergoes stress testing for temperature cycling, humidity bias, and mechanical shock per automotive reliability standards. The SMBJ54CAHM3/H is specified for use in engine control units, body electronics, and ADAS sensor modules where extended temperature operation and long-term surge endurance are required.
What does the "HM3" suffix indicate in SMBJ54CAHM3/H?
The "HM3" suffix in SMBJ54CAHM3/H denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance - distinguishing it from "HE3" (RoHS only) and "E3" (commercial RoHS) variants. This suffix confirms compliance with automotive environmental mandates and ensures suitability for lead-free reflow at 260 °C without moisture sensitivity concerns (MSL Level 1). The SMBJ54CAHM3/H meets these specifications out-of-the-box with no additional qualification needed.
How does SMBJ54CAHM3/H differ from unidirectional SMBJ54A variants?
SMBJ54CAHM3/H is bidirectional, providing symmetrical clamping for both positive and negative transients, whereas unidirectional SMBJ54A types conduct only in one direction and require correct polarity orientation. The SMBJ54CAHM3/H has no cathode band marking and exhibits identical VBR (60.0–66.3 V) and VC (87.1 V) in either direction - critical for AC-coupled lines, transformer-isolated interfaces, or floating grounds where polarity cannot be guaranteed.
What is the thermal resistance of SMBJ54CAHM3/H, and how does it affect layout?
The SMBJ54CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This value directly impacts PCB copper area requirements: reducing pad size increases thermal impedance and risks junction overheating during repetitive surges. For designs expecting frequent 600 W transients, the SMBJ54CAHM3/H layout must maintain minimum pad dimensions and avoid thermal isolation - otherwise, derating of IPPM becomes necessary per Figure 2 in datasheet 88392.
SMBJ54CAHM3/H 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/H FAQ
1.How can I place an order for SMBJ54CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54CAHM3/H 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/H reliable?
The price and inventory of SMBJ54CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ54CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54CAHM3/H?
SMBJ54CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54CAHM3/H 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/H?
For technical support, including SMBJ54CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54CAHM3/H requirements.
6.How does Aetrix verify that SMBJ54CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ54CAHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMBJ54CAHM3/H?
All SMBJ54CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54CAHM3/H, 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/H part is unused and in its original packaging.
Return procedure for SMBJ54CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ54CAHM3/H Tags
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