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Vishay General Semiconductor - Diodes Division SMBJ48D-M3/I
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- Part No.:
- SMBJ48D-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48D-M3/I.pdf
- Description:
- TVS DIODE 48VWM 76.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:14,616
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Product details
Overview
SMBJ48D-M3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, with 48 V stand-off voltage (VWM), 54.1–58.1 V breakdown voltage (VBR) at 1 mA, 76.3 V clamping voltage (VC) at 7.9 A peak pulse current, and 600 W peak pulse power rating (10/1000 μs waveform). It protects MOSFETs, ICs, and sensor signal lines in industrial power supplies and telecom interfaces against inductive switching transients.
For engineers reviewing the SMBJ48D-M3/I datasheet, SMBJ48D-M3/I pinout, SMBJ48D-M3/I application, or SMBJ48D-M3/I equivalent, key selection criteria include unidirectional polarity, ±3.5 % VBR tolerance, low leakage (<0.5 μA at VWM), M3 halogen-free RoHS-compliant construction, and J-STD-020 MSL Level 1 reflow compatibility up to 260 °C.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, conducting only when reverse voltage exceeds VBR to limit transient overvoltage to VC. Its low incremental surge resistance ensures minimal voltage overshoot during fast-rising ESD or lightning-induced surges.
Designed for surface-mount assembly on standard PCB pads (minimum 5.0 mm × 5.0 mm copper area), it delivers 600 W peak pulse power with 0.01 % duty cycle, derating linearly above 25 °C ambient per Fig. 2, and supports junction temperatures from –55 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 54.1 V / 58.1 V at 1 mA - Tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | 76.3 V at 7.9 A - Clamped voltage during 10/1000 μs surge, limiting stress on downstream components |
| PPPM | 600 W - Peak transient energy absorption capability under standardized surge waveform |
| ID @ VWM | <0.5 μA - Ultra-low leakage preserves signal integrity and minimizes standby power loss |
| Package | SMB (DO-214AA) - Low-profile SMD footprint compatible with automated pick-and-place and reflow |
| MSL Level | Level 1 (J-STD-020) - Supports lead-free reflow up to 260 °C peak without moisture sensitivity concerns |
Pinout & Package
Two-terminal unidirectional TVS diode in SMB (DO-214AA) package. Cathode indicated by molded band on case; anode is opposite end. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when V > VBR |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise overvoltage threshold setting without design margin inflation |
| 600 W peak pulse power (10/1000 μs) | Handles high-energy transients common in industrial motor drives and telecom line cards |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes voltage overshoot during clamping, reducing risk of downstream component damage |
| M3 suffix compliance | Halogens-free, RoHS-compliant, and qualified per JESD 201 Class 2 whisker test for long-term reliability |
| MSL Level 1 rating | Eliminates bake-out requirement prior to reflow, streamlining manufacturing flow |
Applications
| Industrial Motor Drive Protection | Telecom Line Interface Protection |
|---|---|
Use Scenario: Protecting gate drivers and IGBTs from inductive kickback during PWM switching in variable-frequency drives. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus or gate-source terminals to clamp voltage spikes before they exceed MOSFET/IGBT breakdown limits. Use Value: With 76.3 V clamping at 7.9 A and 600 W surge rating, SMBJ48D-M3/I prevents destructive overvoltage events while maintaining fast response time. | Use Scenario: Shielding Ethernet PHYs and line interface ICs from lightning-induced surges on RJ45 ports in enterprise switches. IC Role / Device Role / Timing Role: Primary protection device on differential pairs, positioned before common-mode chokes to absorb common-mode transients. Use Value: 48 V VWM aligns with 48 V PoE systems; tight VBR tolerance ensures consistent triggering without false trips during normal operation. |
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
Use Scenario: Safeguarding microcontroller I/O pins and LIN bus transceivers from load dump and ISO 7637-2 pulses in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and chassis ground to shunt transient energy away from transceiver inputs. Use Value: SMBJ48D-M3/I's 150 °C max junction temperature and M3 industrial-grade construction support under-hood thermal environments. | Use Scenario: Protecting analog front-end circuits (e.g., ADC inputs, op-amp buffers) in pressure or temperature sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (≤0.5 μA) TVS placed directly at connector entry point to prevent ESD from propagating into precision signal paths. Use Value: Sub-microamp leakage preserves sensor offset accuracy; SMB package enables compact layout near connectors without compromising board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48A-M3/I | Bidirectional variant; same VWM (48 V), symmetric clamping in both polarities | Required where AC-coupled or bidirectional signal lines (e.g., RS-485, USB D+/D−) need protection | Select SMBJ48A-M3/I only if bidirectional clamping is needed; SMBJ48D-M3/I is optimal for DC-biased unidirectional rails. |
| SMCJ48A-M3/I | Same VWM but larger SMC (DO-214AB) package; higher 1500 W PPPM rating and lower Rsurge | Better suited for higher-energy threats (e.g., IEC 61000-4-5 Level 4) where PCB space allows | Choose SMBJ48D-M3/I for space-constrained designs requiring 600 W protection; upgrade to SMCJ48A-M3/I only when surge energy exceeds SMBJ rating. |
Compared with SMBJ48A-M3/I, SMBJ48D-M3/I offers superior unidirectional clamping precision and lower capacitance for DC rail protection; versus SMCJ48A-M3/I, it trades peak power headroom for 40 % smaller footprint and faster assembly throughput.
Availability
SMBJ48D-M3/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interfaces, and automotive body control modules requiring stable component supply, long-lifecycle support, and M3-compliant material sourcing.
Supply support for SMBJ48D-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and manufacturability.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for robust, high-power transient suppression in harsh industrial, telecom, and automotive environments.
FAQ
What is the maximum clamping voltage of SMBJ48D-M3/I at its rated peak pulse current?
The SMBJ48D-M3/I has a maximum clamping voltage (VC) of 76.3 V when subjected to its peak pulse current (IPPM) of 7.9 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components experience no more than 76.3 V during a defined surge event, making SMBJ48D-M3/I suitable for protecting 48 V nominal systems with appropriate safety margins.
Is SMBJ48D-M3/I suitable for bidirectional signal line protection?
No, SMBJ48D-M3/I is a unidirectional TVS diode, intended for DC-biased applications such as power rails or single-ended I/O lines. For bidirectional protection (e.g., RS-485, CAN, or AC-coupled interfaces), the SMBJ48A-M3/I variant must be used instead. The "D" suffix explicitly denotes unidirectional polarity, and using SMBJ48D-M3/I on bidirectional lines would result in improper clamping during negative transients.
What does the "M3" suffix indicate in SMBJ48D-M3/I?
"M3" denotes Vishay's halogen-free, RoHS-compliant, industrial-grade construction with matte tin-plated leads qualified to JESD 201 Class 2 for whisker resistance. It also confirms compliance with J-STD-020 MSL Level 1, allowing reflow soldering at up to 260 °C peak temperature without preconditioning. SMBJ48D-M3/I is not a commercial-grade variant - the M3 suffix assures suitability for extended-temperature and high-reliability applications.
How does SMBJ48D-M3/I compare to SMAJ48A in terms of package and power handling?
SMBJ48D-M3/I uses the SMB (DO-214AA) package and delivers 600 W peak pulse power, whereas SMAJ48A uses the smaller SMA (DO-214AC) package with only 400 W rating. The SMB package provides better thermal dissipation and higher surge current capability - SMBJ48D-M3/I's 7.9 A IPPM exceeds SMAJ48A's ~5.3 A. Thus, SMBJ48D-M3/I is preferred where higher energy transients or improved thermal performance is required.
Can SMBJ48D-M3/I be used in automotive applications compliant with AEC-Q200?
SMBJ48D-M3/I is not AEC-Q200 qualified. While it operates from –55 °C to +150 °C and meets industrial reliability standards (e.g., M3 whisker testing), Vishay does not list this specific variant under its AEC-Q200-certified portfolio. For automotive-grade transient suppression, engineers should select Vishay's Automotive Qualified (AQ) series, such as AQ-SMBJ48D, which undergoes additional stress testing and lot traceability per AEC-Q200 requirements.
SMBJ48D-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 54.1V
- Voltage - Clamping (Max) @ Ipp:
- 76.3V
- Current - Peak Pulse (10/1000µs):
- 7.9A
- 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)
SMBJ48D-M3/I FAQ
1.How can I place an order for SMBJ48D-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48D-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 SMBJ48D-M3/I reliable?
The price and inventory of SMBJ48D-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 SMBJ48D-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ48D-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48D-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48D-M3/I?
SMBJ48D-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48D-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 SMBJ48D-M3/I?
For technical support, including SMBJ48D-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48D-M3/I requirements.
6.How does Aetrix verify that SMBJ48D-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ48D-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 SMBJ48D-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ48D-M3/I?
All SMBJ48D-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48D-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 SMBJ48D-M3/I part is unused and in its original packaging.
Return procedure for SMBJ48D-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48D-M3/I Tags
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