My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ54CD-M3/I
- Part No.:
- SMBJ54CD-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54CD-M3/I.pdf
- Description:
- TVS DIODE 54VWM 85.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,068
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ54CD-M3/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, with 54 V standoff voltage (VWM), 60.9–65.4 V breakdown voltage (VBR), 600 W peak pulse power (10/1000 μs), clamping voltage of 85.9 V at 7.0 A, and ±3.5 % VBR tolerance. It protects MOSFETs and signal lines in industrial sensor interfaces against inductive switching transients.
For engineers reviewing the SMBJ54CD-M3/I datasheet, SMBJ54CD-M3/I pinout, SMBJ54CD-M3/I application, or SMBJ54CD-M3/I equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal derating curves, MSL Level 1 reflow compatibility, and RoHS/halogen-free compliance for design-in validation.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of surge polarity-critical for AC-coupled or floating signal lines. Its low incremental surge resistance and fast response time ensure effective suppression of ESD and lightning-induced surges without affecting signal integrity.
The device is rated for 600 W peak pulse power per 10/1000 μs waveform at TA = 25 °C, with thermal resistance RθJA = 125 °C/W on minimum pad layout and RθJM = 20 °C/W to mounting surface. Junction temperature is rated from –55 °C to +150 °C, supporting operation in harsh industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - maximum reverse stand-off voltage before conduction begins; defines safe operating range for protected circuit |
| VBR min/max | 60.9 V / 65.4 V - tight ±3.5 % breakdown tolerance ensures predictable clamping onset across production lots |
| VC @ IPPM | 85.9 V - clamping voltage at 7.0 A peak pulse current; determines maximum voltage seen by downstream ICs during surge |
| PPPM | 600 W - peak pulse power handling capability with 10/1000 μs waveform; validates robustness against IEC 61000-4-5 surge events |
| ID @ VWM | 0.5 μA - ultra-low leakage at rated standoff voltage; avoids loading sensitive analog or high-impedance sensor inputs |
| TJ max | +150 °C - maximum junction temperature rating enables reliable operation in enclosed industrial enclosures or near heat sources |
| MSL Level | Level 1 (per J-STD-020) - supports standard reflow profiles up to 260 °C peak without preconditioning |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals, M3 suffix indicating JESD 201 Class 2 whisker resistance and industrial-grade qualification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Surge current entry point (bidirectional) | No polarity marking; symmetrical terminals enable use on AC or floating nodes without orientation constraints |
| Anode (Cathode) | Surge current exit point (bidirectional) | Identical terminal construction ensures matched clamping in both directions; no cathode band present |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled data lines (e.g., RS-485, CAN, Ethernet PHY) without external polarity management |
| ±3.5 % VBR tolerance | Reduces design margin overhead and allows tighter coordination with IC absolute maximum ratings |
| 600 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV line-to-line, 2 kV line-to-ground) surge immunity requirements |
| Low 0.5 μA leakage @ 54 V | Preserves accuracy and offset stability in precision sensor front-ends and battery-powered IoT nodes |
| MSL Level 1 rating | Eliminates moisture sensitivity handling requirements and supports standard SMT assembly without baking |
Applications
| Industrial Sensor Interface | RS-485 Communication Port |
|---|---|
Use Scenario: Protecting 4–20 mA current loop transmitters and analog sensor outputs from field wiring transients in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair or between signal and ground to clamp common-mode surges. Use Value: Prevents latch-up or permanent damage to op-amps and ADCs while maintaining <1 nA input bias current integrity. | Use Scenario: Safeguarding half-duplex RS-485 transceivers connected to long cable runs exposed to EFT and surge in building control systems. IC Role / Device Role / Timing Role: Placed line-to-line and line-to-ground to suppress differential and common-mode transients without distorting 10 Mbps signaling. Use Value: Ensures >10⁵ surge cycles without parameter shift, validated per IEC 61000-4-4/4-5 test waveforms. |
| Automotive Body Control Module | Smart Meter Signal Conditioning |
Use Scenario: Shielding LIN bus and switch inputs in BCMs from load dump and inductive kickback in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional variant used for supply rail clamping; SMBJ54CD-M3/I applied to bidirectional LIN or sensor lines requiring polarity-agnostic protection. Use Value: Withstands repetitive 100 V/50 ms load dump pulses while maintaining <100 ns response to fast ESD events. | Use Scenario: Securing metrology ADC inputs and isolated UART lines in ANSI C12.1/C12.20-certified smart meters deployed in utility substations. IC Role / Device Role / Timing Role: Bidirectional clamping across CT/PT secondary windings and isolated communication interfaces to meet ANSI/IEEE C62.35 surge standards. Use Value: Delivers 85.9 V clamping at 7.0 A with <0.5 μA leakage-critical for Class 0.2 accuracy retention under continuous 54 V bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54CA-E3/52 | Same VWM (54 V), same SMB package, but ±5 % VBR tolerance (vs. ±3.5 %); higher ID (1.0 μA vs. 0.5 μA) | Acceptable where tighter VBR matching is not required and slightly higher leakage is tolerable | Select SMBJ54CD-M3/I when designing for high-precision analog front-ends or extended temperature operation where leakage and tolerance directly impact system margin |
| P6SMB54CA | Same VWM and bidirectional function, but lower PPPM (600 W vs. 600 W - identical), different thermal resistance (RθJA = 135 °C/W vs. 125 °C/W), non-M3 grade | Lacks JESD 201 Class 2 whisker resistance and halogen-free certification | Choose SMBJ54CD-M3/I for industrial or automotive programs requiring traceable sourcing, MSL Level 1, and full compliance documentation |
Compared with SMBJ54CA-E3/52 and P6SMB54CA, SMBJ54CD-M3/I offers tighter VBR tolerance, lower leakage, M3 industrial qualification, and superior thermal performance-making it preferred for high-reliability sensor and communication interface designs where long-term parametric stability is critical.
Availability
SMBJ54CD-M3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, RS-485 communication ports, automotive body control modules, and smart meter signal conditioning requiring stable component supply across multi-year production cycles.
Supply support for SMBJ54CD-M3/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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in space-constrained surface-mount applications-targeting industrial automation, telecom infrastructure, and automotive subsystems demanding consistent clamping performance and long-term parametric stability.
FAQ
What is the clamping voltage of SMBJ54CD-M3/I at its rated peak pulse current?
The SMBJ54CD-M3/I has a maximum clamping voltage (VC) of 85.9 V at its rated peak pulse current (IPPM) of 7.0 A, measured using a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream ICs remain within their absolute maximum ratings. The SMBJ54CD-M3/I maintains this clamping performance symmetrically in both directions due to its bidirectional construction.
Is SMBJ54CD-M3/I suitable for protecting RS-485 bus lines?
Yes, SMBJ54CD-M3/I is well-suited for RS-485 bus protection. Its bidirectional configuration allows placement across A/B differential lines or from each line to ground without polarity concerns. With 54 V standoff, 85.9 V clamping at 7.0 A, and low capacitance (<100 pF), it preserves signal integrity up to 10 Mbps while meeting IEC 61000-4-4/4-5 surge immunity requirements. The SMB package fits standard RS-485 layout footprints and supports automated assembly.
Does SMBJ54CD-M3/I have a cathode marking?
No, SMBJ54CD-M3/I does not have a cathode band or polarity marking. As a bidirectional TVS diode, it features symmetrical terminals with identical electrical characteristics in both directions. This eliminates orientation constraints during PCB placement and simplifies layout for AC-coupled or floating signal paths-unlike unidirectional variants (e.g., SMBJ54D) which use a band to denote the cathode end.
What is the thermal resistance of SMBJ54CD-M3/I on standard PCB pads?
The SMBJ54CD-M3/I has a typical junction-to-ambient thermal resistance (RθJA) of 125 °C/W when mounted on the minimum recommended pad layout per Vishay's datasheet. On a 5.0 mm × 5.0 mm copper pad, RθJA improves to 100 °C/W. Its junction-to-mount thermal resistance (RθJM) is 20 °C/W, enabling effective heat transfer to heatsinked ground planes-key for sustaining repeated surge events in thermally constrained industrial enclosures.
How does the M3 suffix affect SMBJ54CD-M3/I's compliance and reliability?
The M3 suffix on SMBJ54CD-M3/I indicates halogen-free, RoHS-compliant construction; compliance with JESD 201 Class 2 whisker resistance testing; and qualification for industrial-grade temperature cycling and humidity exposure. It also confirms MSL Level 1 rating (peak reflow ≤260 °C), eliminating bake requirements prior to SMT assembly. These attributes differentiate it from base variants like SMBJ54CD and support long-term reliability in mission-critical industrial and automotive applications.
SMBJ54CD-M3/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):
- 60.9V
- Voltage - Clamping (Max) @ Ipp:
- 85.9V
- Current - Peak Pulse (10/1000µs):
- 7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ54CD-M3/I FAQ
1.How can I place an order for SMBJ54CD-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54CD-M3/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 SMBJ54CD-M3/I reliable?
The price and inventory of SMBJ54CD-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54CD-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ54CD-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54CD-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54CD-M3/I?
SMBJ54CD-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54CD-M3/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 SMBJ54CD-M3/I?
For technical support, including SMBJ54CD-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54CD-M3/I requirements.
6.How does Aetrix verify that SMBJ54CD-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ54CD-M3/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 SMBJ54CD-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ54CD-M3/I?
All SMBJ54CD-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54CD-M3/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 SMBJ54CD-M3/I part is unused and in its original packaging.
Return procedure for SMBJ54CD-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ54CD-M3/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 …
