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Vishay General Semiconductor - Diodes Division SMBJ54AHM3_B/I
- Part No.:
- SMBJ54AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54AHM3_B/I.pdf
- Description:
- 600W,54V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,032
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Product details
Overview
SMBJ54AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising voltage transients up to 600 W peak pulse power (10/1000 µs), with 54 V stand-off voltage (VWM), 60.0–66.3 V breakdown voltage (VBR at 1 mA), and 87.1 V maximum clamping voltage (VC) at 6.9 A peak pulse current. It protects MOSFETs, ICs, and sensor signal lines in industrial power supplies and telecom interfaces.
For engineers reviewing the SMBJ54AHM3_B/I datasheet, SMBJ54AHM3_B/I pinout, SMBJ54AHM3_B/I application, or SMBJ54AHM3_B/I equivalent, this part delivers AEC-Q101-qualified surge immunity, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive-grade board-level ESD and lightning surge protection design validation.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping protection device across DC power rails or signal paths, triggering when reverse voltage exceeds its 60.0 V minimum breakdown threshold. Its glass-passivated junction ensures stable leakage (<1.0 µA at 54 V) and fast response time (<1.0 ns), enabling suppression of EFT bursts and inductive switching spikes before downstream components are damaged.
The SMBJ54AHM3_B/I uses a planar silicon junction structure optimized for repetitive 10/1000 µs surge waveforms at 0.01% duty cycle, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). Its halogen-free, RoHS-compliant matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 whisker resistance Class 2 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for 48 V nominal systems. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction under normal operation. |
| VC @ IPPM | 87.1 V at 6.9 A - Clamping voltage during 600 W transient limits stress on protected ICs to safe levels per IEC 61000-4-5. |
| PPPM | 600 W - Peak pulse power rating with 10/1000 µs waveform supports robust protection against lightning surges and inductive kickback. |
| IFSM | 100 A - Non-repetitive forward surge current rating enables handling of high-energy 8.3 ms half-sine transients in power supply inputs. |
| TJ max | +150 °C - Maximum junction temperature allows operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height, compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), cathode-banded unidirectional configuration. Matte tin-plated leads; band denotes cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side (e.g., ground or return path); defines polarity-sensitive placement on PCB. |
| Cathode | Clamping output / Surge current sink | Banded end connected to protected line (e.g., 48 V rail or signal trace); conducts surge current to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV) surge testing on 48 V DC power inputs without derating. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive electronics use including body control modules and infotainment power rails with zero infant mortality risk. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without preconditioning or baking, reducing production cost and yield loss. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes voltage overshoot during transients, preserving margin for 60 V-rated MOSFETs and 75 V input capacitors. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and chassis ground to limit transient voltage to <88 V during 100 A/50 ms load dump events. Use Value: Prevents destruction of upstream DC-DC controller ICs and downstream 60 V-rated MOSFETs by maintaining clamped voltage below their absolute maximum ratings. |
Use Scenario: LIN bus transceiver power line in door module subjected to ISO 7637-2 Pulse 1 and Pulse 2a transients. IC Role / Device Role / Timing Role: Standoff protection device on VCC rail, absorbing 100 V/50 ms negative pulses while maintaining <1 µA leakage at 12 V nominal. Use Value: Eliminates need for additional series impedance or RC filtering, preserving signal integrity and meeting automotive EMC immunity requirements. |
| Telecom Remote Radio Unit (RRU) | Consumer Smart Meter Interface |
|
Use Scenario: +48 V phantom power line feeding remote RF amplifiers, vulnerable to induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary surge arrestor mounted at connector entry point, conducting >6 A peak current within <1 ns to shunt energy before reaching DC-DC converters. Use Value: Achieves IEC 61000-4-5 4 kV line-to-ground surge immunity without sacrificing efficiency or requiring oversized heatsinking. |
Use Scenario: RS-485 communication port on electricity meter exposed to ESD and fast transient bursts in utility substations. IC Role / Device Role / Timing Role: Secondary protection stage after GDT, clamping residual transients to <90 V to safeguard isolated transceiver ICs rated for 70 V abs max. Use Value: Extends field lifetime by preventing cumulative degradation of interface ICs under repeated 8 kV contact ESD events per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54AHE3_B/I | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification; same electrical specs and SMB package. | Approved for commercial/industrial use only; excluded from automotive Tier 1 BOMs requiring halogen-free and AEC-Q101 compliance. | Select SMBJ54AHM3_B/I when halogen-free content and automotive qualification are mandatory per OEM specification. |
| SMAJ54A-M3/5B | Lower 400 W peak pulse power; SMA (DO-214AC) package with smaller 4.5 mm × 2.7 mm footprint and higher RθJA (140 °C/W). | Suitable for space-constrained consumer designs with lower surge threat levels (IEC 61000-4-5 Level 2); not recommended for 48 V industrial or automotive rails. | Choose SMBJ54AHM3_B/I for higher power handling and thermal performance where PCB layout allows SMB footprint. |
Compared with SMBJ54AHE3_B/I, the SMBJ54AHM3_B/I adds halogen-free construction and AEC-Q101 qualification without trade-offs in clamping performance; versus SMAJ54A-M3/5B, it provides 50% higher surge power rating and superior thermal dissipation in the same mounting process flow.
Availability
SMBJ54AHM3_B/I is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and telecom remote radio units requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ54AHM3_B/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, and protection devices with emphasis on reliability, power handling, and automotive-grade qualification.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments - targeting 48 V and 60 V system rails in automotive, industrial, and telecom infrastructure where failure modes must be eliminated.
FAQ
What is the maximum clamping voltage of SMBJ54AHM3_B/I at its rated peak pulse current?
The SMBJ54AHM3_B/I has a maximum clamping voltage (VC) of 87.1 V at its specified peak pulse current (IPPM) of 6.9 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry sees no more than 87.1 V during worst-case surge events, making SMBJ54AHM3_B/I suitable for safeguarding 60 V-rated components in 48 V systems.
Is SMBJ54AHM3_B/I suitable for automotive applications?
Yes, SMBJ54AHM3_B/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - explicitly certified for automotive use cases including body control modules, infotainment power rails, and LIN/CAN node protection. The HM3 suffix confirms full qualification, distinguishing it from commercial-grade variants like SMBJ54A-E3/5B, and ensuring reliability under extended temperature cycling and humidity exposure per automotive standards.
How does the SMBJ54AHM3_B/I differ from SMBJ54AHE3_B/I?
The SMBJ54AHM3_B/I differs from SMBJ54AHE3_B/I in two key ways: it is halogen-free (per IEC 61249-2-21) and AEC-Q101 qualified, whereas SMBJ54AHE3_B/I is RoHS-compliant but contains halogens and lacks automotive qualification. Both share identical electrical parameters (VWM = 54 V, VBR = 60.0–66.3 V, VC = 87.1 V), SMB package, and solderability - making SMBJ54AHM3_B/I the required choice for Tier 1 automotive designs.
What is the thermal resistance of SMBJ54AHM3_B/I, and how does it affect PCB layout?
SMBJ54AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. These values assume mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repetitive surges, designers must allocate adequate copper area and avoid thermal isolation - underscoring why SMBJ54AHM3_B/I's low RθJL makes it well-suited for compact layouts with internal ground planes.
Does SMBJ54AHM3_B/I have polarity marking, and how is it oriented on the PCB?
Yes, SMBJ54AHM3_B/I is unidirectional and features a cathode band printed on the package body - visible as a dark stripe near one end. During PCB layout, the banded end must connect to the line being protected (e.g., +48 V rail), while the unbanded (anode) end connects to ground or the lower-potential reference. Incorrect orientation renders the device nonfunctional as a clamp, since forward conduction would occur under normal bias instead of reverse breakdown.
SMBJ54AHM3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ54AHM3_B/I FAQ
1.How can I place an order for SMBJ54AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54AHM3_B/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 SMBJ54AHM3_B/I reliable?
The price and inventory of SMBJ54AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ54AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54AHM3_B/I?
SMBJ54AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54AHM3_B/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 SMBJ54AHM3_B/I?
For technical support, including SMBJ54AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54AHM3_B/I requirements.
6.How does Aetrix verify that SMBJ54AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ54AHM3_B/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 SMBJ54AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ54AHM3_B/I?
All SMBJ54AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54AHM3_B/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 SMBJ54AHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ54AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ54AHM3_B/I Tags
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