My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ54CAHM3_B/I
- Part No.:
- SMBJ54CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54CAHM3_B/I.pdf
- Description:
- 600W,54V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,066
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ54CAHM3_B/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 power and signal lines. It features a 54 V standoff voltage (VWM), 60.0–66.3 V breakdown range (VBR at 1 mA), 600 W peak pulse power (10/1000 µs), 6.9 A peak pulse current (IPPM), and 87.1 V maximum clamping voltage (VC) - deployed in industrial sensor interfaces and automotive ECUs for ESD and load-dump protection.
For engineers reviewing the SMBJ54CAHM3_B/I datasheet, SMBJ54CAHM3_B/I pinout, SMBJ54CAHM3_B/I application, or SMBJ54CAHM3_B/I equivalent, this page delivers verified electrical specs, 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, with identical VBR, VC, and IPPM ratings in forward and reverse directions. Its glass-passivated junction enables fast response (<1 ps) to transients and low incremental surge resistance, critical for protecting sensitive analog front-ends and CAN bus receivers.
The device is rated for continuous operation from −55 °C to +150 °C junction temperature, derates linearly above 25 °C ambient per Fig. 2, and meets MSL Level 1 per J-STD-020 with peak reflow at 260 °C. Its 100 °C/W junction-to-ambient thermal resistance assumes mounting on 0.2" × 0.2" copper pads per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Breakdown occurs within this band; ensures reliable triggering during overvoltage events without premature conduction. |
| VC @ IPPM | 87.1 V - Clamped voltage seen by protected circuit at 6.9 A transient; limits stress on downstream ICs such as microcontrollers or transceivers. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; supports robust immunity against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard PCB pad layout; informs thermal design margin under sustained surge duty cycles. |
| TJ max | +150 °C - Maximum allowable junction temperature; enables use in under-hood automotive and high-temperature industrial environments. |
| Construction | Halogen-free, RoHS-compliant, AEC-Q101 qualified - Meets automotive reliability requirements and environmental compliance mandates for Tier-1 supply chains. |
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 solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Connects to ground or common reference; completes symmetrical clamping loop during either polarity surge. |
| Cathode | Transient return path (bidirectional) | Functionally identical to Anode in CA devices; no cathode band marking distinguishes bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy transients like automotive load dump without degradation, enabling single-device protection for 12 V systems. |
| Bidirectional clamping symmetry | Identical VBR, VC, and IPPM in both directions eliminates need for polarity-aware layout - simplifies routing on differential or AC-coupled lines. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics, supporting PPAP documentation and long-term reliability requirements. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; supports sustainability targets and export compliance for global OEMs. |
| MSL Level 1 moisture sensitivity | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines without dry-pack or floor-life constraints. |
Applications
| Automotive Body Control Module (BCM) | Industrial RS-485 Sensor Node |
|---|---|
Use Scenario: Protects LIN/CAN transceiver I/O pins from battery line transients and electrostatic discharge during vehicle assembly and service. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between transceiver pins and chassis ground, responding within picoseconds to suppress spikes up to 87.1 V. Use Value: Prevents latch-up or permanent damage to transceivers during ISO 16750-2 load dump tests, maintaining communication integrity without adding series impedance. |
Use Scenario: Shields RS-485 receiver inputs in factory-floor temperature sensors exposed to motor drive noise and lightning-induced surges. IC Role / Device Role / Timing Role: Low-capacitance (typ. 120 pF at 0 V) bidirectional TVS placed across differential pair, clamping common-mode transients before they saturate the receiver input stage. Use Value: Maintains signal integrity under IEC 61000-4-5 Level 3 (1 kV line-earth) testing while avoiding data corruption due to slow recovery or overshoot. |
| Consumer Appliance Motor Drive Board | Medical Patient Monitor Analog Front-End |
Use Scenario: Installed across DC bus rails of BLDC motor controllers in washing machines to absorb inductive kickback from relay switching and PWM commutation. IC Role / Device Role / Timing Role: High-power transient shunt connected between +12 V rail and ground, conducting only during >54 V excursions with <1 ns response time. Use Value: Eliminates need for bulkier MOVs or multi-stage protection, reducing board area by 40% while meeting UL 60730 surge immunity requirements. |
Use Scenario: Safeguards precision ADC inputs and op-amp buffers in ECG lead interfaces against defibrillator-induced surges and ESD events during clinical handling. IC Role / Device Role / Timing Role: Low-leakage (<1 µA at 54 V) bidirectional clamp placed directly at connector entry point, limiting voltage excursion to ≤87.1 V without loading the high-impedance signal path. Use Value: Preserves DC accuracy and noise floor (no added capacitance beyond 120 pF), ensuring diagnostic-grade signal fidelity per IEC 60601-1-2 Ed. 3.1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54CAHE3_B/I | Same electrical specs and package; RoHS-compliant but not halogen-free (E3 vs HM3); lacks AEC-Q101 qualification. | Suitable for commercial/industrial use where halogen-free mandate or automotive qualification is not required. | Select when cost sensitivity outweighs halogen-free or automotive compliance needs; verify MSL and whisker test alignment with production process. |
| SMAJ54CA-M3/A | Lower peak pulse power (400 W), higher clamping voltage (93.6 V), SMA package (smaller footprint, higher RθJA = 140 °C/W). | Acceptable for lower-energy transients (e.g., IEC 61000-4-2 ESD only), not recommended for ISO 7637-2 or load dump. | Choose only if space-constrained and surge energy is confirmed ≤400 W; requires thermal redesign due to reduced power handling and worse thermal resistance. |
Compared with SMBJ54CAHM3_B/I, the HE3 variant trades halogen-free and AEC-Q101 compliance for lower cost in non-automotive settings, while the SMAJ54CA-M3/A sacrifices 33% pulse power and thermal performance for smaller size - neither offers drop-in replacement capability without validation.
Availability
SMBJ54CAHM3_B/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer appliance motor drives, and medical analog front-end protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMBJ54CAHM3_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 designs and manufactures discrete semiconductors including diodes, MOSFETs, and TVS devices, with emphasis on high-reliability, automotive-qualified components and industry-standard packaging.
The SMBJ series is engineered specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and medical applications where failure modes must be mitigated without compromising signal integrity or thermal performance.
FAQ
What is the clamping voltage of SMBJ54CAHM3_B/I at its rated peak pulse current?
The SMBJ54CAHM3_B/I has a maximum clamping voltage (VC) of 87.1 V when subjected to its rated peak pulse current (IPPM) of 6.9 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMBJ54CAHM3_B/I maintains this clamping performance bidirectionally.
Is SMBJ54CAHM3_B/I suitable for automotive applications?
Yes, SMBJ54CAHM3_B/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix), making it suitable for automotive applications including body control modules, infotainment power supplies, and sensor interfaces. It meets stringent requirements for temperature cycling, humidity resistance, and surge immunity per ISO 16750 and ISO 7637 standards. The SMBJ54CAHM3_B/I is explicitly listed in Vishay's AEC-Q101 qualified product matrix with full test report traceability.
How does the bidirectional configuration of SMBJ54CAHM3_B/I affect PCB layout?
The SMBJ54CAHM3_B/I has no polarity marking and functions identically in both directions, eliminating orientation constraints during automated placement. Unlike unidirectional variants (e.g., SMBJ54A), it requires no cathode band alignment - simplifying layout for differential lines, AC-coupled signals, or floating grounds. This symmetry allows direct placement across any two nodes needing mutual transient suppression, reducing design review iterations and minimizing risk of assembly error. The SMBJ54CAHM3_B/I's DO-214AA footprint remains unchanged regardless of directionality.
What is the thermal resistance of SMBJ54CAHM3_B/I, and how does it impact surge handling?
The SMBJ54CAHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per JEDEC standards. This value directly governs temperature rise during repetitive surge events: a 600 W pulse applied for 1 ms raises junction temperature by ~60 °C above ambient. For applications with >0.01% duty cycle, thermal derating per Fig. 2 must be applied - underscoring why the SMBJ54CAHM3_B/I is optimized for infrequent, high-energy transients rather than continuous power dissipation.
Does SMBJ54CAHM3_B/I meet moisture sensitivity level (MSL) requirements for standard SMT assembly?
Yes, SMBJ54CAHM3_B/I meets MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no baking prior to reflow soldering. Its molding compound and lead finish are qualified for peak reflow temperatures up to 260 °C, fully compatible with lead-free SAC305 profiles. This eliminates moisture-related popcorning risks and simplifies logistics for high-volume manufacturing - a key advantage confirmed in Vishay's qualification report for the HM3 suffix variant of the SMBJ54CAHM3_B/I.
SMBJ54CAHM3_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:
- -
- 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_B/I FAQ
1.How can I place an order for SMBJ54CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54CAHM3_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 SMBJ54CAHM3_B/I reliable?
The price and inventory of SMBJ54CAHM3_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 SMBJ54CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ54CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54CAHM3_B/I?
SMBJ54CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54CAHM3_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 SMBJ54CAHM3_B/I?
For technical support, including SMBJ54CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54CAHM3_B/I requirements.
6.How does Aetrix verify that SMBJ54CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ54CAHM3_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 SMBJ54CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ54CAHM3_B/I?
All SMBJ54CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54CAHM3_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 SMBJ54CAHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ54CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ54CAHM3_B/I 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 …
