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Vishay General Semiconductor - Diodes Division SMBJ48D-M3/H
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- Part No.:
- SMBJ48D-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48D-M3/H.pdf
- Description:
- TVS DIODE 48VWM 76.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,766
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Product details
Overview
SMBJ48D-M3/H 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), 76.3 V clamping voltage (VC) at 7.9 A peak pulse current, and 600 W peak pulse power rating (10/1000 μs). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in industrial power supplies and telecom interfaces.
For engineers reviewing the SMBJ48D-M3/H datasheet, SMBJ48D-M3/H pinout, SMBJ48D-M3/H application, or SMBJ48D-M3/H equivalent, key selection criteria include unidirectional polarity, ±3.5 % VBR tolerance, 0.5 μA max reverse leakage at VWM, MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant construction per JESD 201 Class 2 whisker test.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when transient voltage exceeds its breakdown threshold. Its low incremental surge resistance and fast response time ensure effective suppression of sub-microsecond transients without affecting normal signal integrity.
Designed for surface-mount assembly on standard PCB pad layouts (5.0 mm × 5.0 mm copper), it delivers 5.0 W power dissipation at 50 °C case temperature and maintains stable clamping performance across -55 °C to +150 °C junction temperature range, with thermal resistance RθJA = 125 °C/W on minimum recommended pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 54.1 V / 58.1 V - tight ±3.5 % breakdown tolerance ensures predictable turn-on behavior |
| VC @ IPPM | 76.3 V - clamping voltage at 7.9 A peak pulse current limits stress on downstream components |
| PPPM | 600 W - peak pulse power handling capability with 10/1000 μs waveform |
| ID @ VWM | 0.5 μA - ultra-low reverse leakage preserves signal line integrity in high-impedance circuits |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 2.20 mm height and 5.59 mm length |
| MSL Level | Level 1 (per J-STD-020) - no floor life limitation; safe for reflow up to 260 °C peak |
Pinout & Package
Two-terminal unidirectional TVS diode in SMB (DO-214AA) package. Cathode indicated by molded band on body; anode is opposite end. Matte tin-plated leads meet J-STD-002 solderability and JESD 22-B102 mechanical robustness requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to ground or low-impedance return path to shunt surge energy away from protected node |
| Anode | Protected line connection | Connected directly to I/O line, power rail, or signal trace requiring overvoltage protection |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise coordination with system overvoltage thresholds without margin stacking |
| 600 W PPPM (10/1000 μs) | Supports robust protection against IEC 61000-4-5 Level 4 surges in industrial environments |
| 0.5 μA ID @ VWM | Minimizes standby power loss and avoids false triggering in battery-powered sensor nodes |
| Halogen-free, RoHS-compliant M3 suffix | Meets IPC-1752A material declaration requirements and JESD 201 Class 2 whisker resistance |
| Low-profile SMB package | Enables automated placement in space-constrained applications such as telecom modules and motor drive PCBs |
Applications
| Industrial Motor Drive Protection | Telecom Line Interface Protection |
|---|---|
Use Scenario: Protecting gate drivers and feedback sensing circuits from flyback voltage spikes during MOSFET/IGBT switching in variable-frequency drives. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus or gate-source terminals to clamp transients below MOSFET VDS or VGS ratings. Use Value: Prevents cumulative degradation of power semiconductors by limiting repetitive 76.3 V clamping events during 600 W surge conditions. | Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs from induced surges on long-haul data lines exposed to lightning or EFT. IC Role / Device Role / Timing Role: Parallel-connected TVS on differential pair (A/B) and common-mode lines to absorb common- and differential-mode transients. Use Value: Maintains signal integrity under IEC 61000-4-5 4 kV surge testing due to fast response and low VC/VWM ratio (1.59×). |
| Consumer Power Adapter Input Stage | Automotive Body Control Module (BCM) Sensor Inputs |
Use Scenario: Safeguarding AC-DC primary-side controllers and optocoupler feedback paths against mains-borne surges in wall adapters. IC Role / Device Role / Timing Role: Mounted between rectified DC output and ground to clamp line-to-ground transients before they reach PWM controller ICs. Use Value: Enables compliance with UL 62368-1 transient immunity requirements using single-device solution with 48 V VWM matching typical 42–48 V DC bus levels. | Use Scenario: Protecting analog inputs of BCM microcontrollers from load-dump and jump-start transients on 12 V sensor supply rails. IC Role / Device Role / Timing Role: Unidirectional TVS connected between sensor VCC line and chassis ground to suppress positive-going transients up to 76.3 V. Use Value: Survives ISO 7637-2 Pulse 1 (−150 V) and Pulse 2a (+100 V) waveforms when used with series impedance, leveraging 150 °C TJ max rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48A-M3/H | Same VWM (48 V), but tighter VBR tolerance (±2.5 %); otherwise identical electrical specs and package | Preferred where tighter clamping consistency is required across production lots, e.g., safety-critical power monitoring circuits | Select SMBJ48A-M3/H only if design requires < ±3.0 % VBR variation; SMBJ48D-M3/H offers optimal cost/performance balance for general-purpose protection |
| SMCJ48A | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VWM/VBR/VC specs | Suitable for higher-energy surge environments (e.g., outdoor telecom cabinets) where board space allows larger footprint | Choose SMCJ48A when surge energy exceeds 600 W capability; SMBJ48D-M3/H remains optimal for space-constrained designs needing 600 W rating |
Compared with SMBJ48A-M3/H, the SMBJ48D-M3/H trades ±2.5 % VBR tolerance for broader availability and lower unit cost, while versus SMCJ48A it sacrifices 900 W pulse power headroom to achieve 30 % smaller PCB area-making it ideal for compact industrial and consumer electronics where 600 W protection suffices.
Availability
SMBJ48D-M3/H is available at Aetrix Electronics and suitable for industrial motor drives, telecom line interfaces, and consumer power adapter input stages requiring stable component supply, consistent M3-grade halogen-free compliance, and full traceability from Vishay General Semiconductor.
Supply support for SMBJ48D-M3/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 manufacturability.
The SMBJ series was engineered specifically for surface-mount transient suppression in high-volume industrial, automotive, and telecom systems-balancing tight VBR tolerance, low leakage, and robust 600 W surge capability in the compact SMB footprint.
FAQ
What is the clamping voltage of SMBJ48D-M3/H at its rated peak pulse current?
The SMBJ48D-M3/H has a maximum clamping voltage (VC) of 76.3 V at 7.9 A peak pulse current (IPPM), measured with 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 components remain within their absolute maximum ratings. The SMBJ48D-M3/H maintains this clamping performance across its full operating temperature range.
Is SMBJ48D-M3/H suitable for bidirectional transient protection?
No, SMBJ48D-M3/H is a unidirectional TVS diode, identified by the "D" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMBJ48CD-M3/H variant (with "CD" suffix), which provides symmetrical clamping in both polarities. Using SMBJ48D-M3/H in bidirectional applications risks failure during negative transients, as it conducts only in reverse bias above VBR.
What does the "-M3/H" suffix indicate in SMBJ48D-M3/H?
The "-M3/H" suffix denotes Vishay's industrial-grade, halogen-free, RoHS-compliant construction: "M3" specifies matte tin-plated leads meeting JESD 201 Class 2 whisker resistance and J-STD-020 MSL Level 1, while "H" indicates packaging in 7″ tape-and-reel format with 750 units per reel. This suffix confirms compliance with IPC-1752A material declarations and suitability for lead-free reflow processes.
Can SMBJ48D-M3/H be used in automotive applications?
Yes, SMBJ48D-M3/H is qualified for automotive body electronics applications such as BCM sensor inputs and lighting control modules, provided the design accounts for its 150 °C max junction temperature and uses appropriate board layout (e.g., 5.0 mm × 5.0 mm copper pads). It meets ISO 7637-2 Pulse 1 and Pulse 2a immunity requirements when combined with series impedance, though AEC-Q200 qualification is not claimed for this specific variant.
How does SMBJ48D-M3/H compare to SMAJ48A in terms of surge capability?
SMBJ48D-M3/H delivers 600 W peak pulse power (10/1000 μs), whereas SMAJ48A is rated for only 400 W in the smaller SMA package. The SMBJ48D-M3/H also features tighter VBR tolerance (±3.5 % vs. ±5 % for SMAJ48A) and lower clamping voltage (76.3 V vs. 77.4 V), making it superior for applications demanding higher energy absorption and more precise voltage limiting in the same form factor family.
SMBJ48D-M3/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:
- 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/H FAQ
1.How can I place an order for SMBJ48D-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48D-M3/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 SMBJ48D-M3/H reliable?
The price and inventory of SMBJ48D-M3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMBJ48D-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48D-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48D-M3/H?
SMBJ48D-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48D-M3/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 SMBJ48D-M3/H?
For technical support, including SMBJ48D-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48D-M3/H requirements.
6.How does Aetrix verify that SMBJ48D-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ48D-M3/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 SMBJ48D-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ48D-M3/H?
All SMBJ48D-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48D-M3/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 SMBJ48D-M3/H part is unused and in its original packaging.
Return procedure for SMBJ48D-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48D-M3/H Tags
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Diodes Incorporated
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