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Vishay General Semiconductor - Diodes Division SMBJ48CAHE3_B/I
- Part No.:
- SMBJ48CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48CAHE3_B/I.pdf
- Description:
- 600W,48V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,064
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Product details
Overview
SMBJ48CAHE3_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 48 V standoff voltage (VWM), 53.3–58.9 V breakdown range (VBR), 77.4 V maximum clamping voltage (VC) at 7.8 A peak pulse current, and 600 W peak pulse power (10/1000 µs waveform), used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ48CAHE3_B/I datasheet, SMBJ48CAHE3_B/I pinout, SMBJ48CAHE3_B/I application, or SMBJ48CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature limit (TJ = 150 °C), and compliance with UL 497B surge protector classification.
Technical Context
This device operates as a voltage-clamping protection element, responding to transient overvoltages by entering avalanche conduction when reverse voltage exceeds VBR. Its bidirectional symmetry enables use on AC-coupled or floating signal paths without polarity constraints.
It delivers 600 W peak pulse power handling per 10/1000 µs waveform with 0.01 % duty cycle, exhibits low incremental surge resistance, and maintains stable clamping performance across -55 °C to +150 °C operating junction temperature range. The glass-passivated junction ensures robust surge endurance and long-term reliability under repetitive transient stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 53.3 V / 58.9 V - Breakdown voltage range at 1 mA test current; determines precise clamping onset threshold. |
| VC @ IPPM | 77.4 V - Clamped voltage at 7.8 A peak pulse current; directly limits maximum stress on protected downstream circuitry. |
| PPPM | 600 W - Peak pulse power dissipation capability with 10/1000 µs waveform; quantifies transient energy absorption capacity. |
| TJ max | +150 °C - Maximum junction temperature; sets thermal design boundary for PCB layout and power derating. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; informs required copper pad area and airflow for sustained operation. |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.220" x 0.155" footprint; compatible with automated placement and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (bidirectional) | Conducts surge current during positive or negative overvoltage events; symmetric with cathode in CA devices. |
| Cathode | Transient current exit point (bidirectional) | Completes low-impedance path to ground or reference during clamping; functionally identical to anode in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC or floating lines without polarity sensitivity; eliminates need for dual-device configurations. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per JESD22-A108. |
| 600 W peak pulse power | Handles high-energy transients such as ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges without degradation. |
| UL 497B recognized | Qualified as a Class B telecom protector (file E136766); supports safety-certified designs in communication infrastructure. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/85 % RH; allows direct placement without baking or moisture-sensitive handling. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O against inductive kickback from relay coils and solenoid switching. IC Role / Device Role / Timing Role: Voltage clamping element placed across MOSFET gate-source or MCU input pins. Use Value: Limits transient overshoot to ≤77.4 V, preventing latch-up or oxide damage in 3.3 V/5 V logic interfaces. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Bidirectional transient shunt connected between signal line and chassis ground. Use Value: Withstands 10/1000 µs pulses up to 600 W while maintaining <1 µA leakage at 48 V, ensuring signal integrity. |
| Telecom Power Feeds | Industrial PLC Analog Inputs |
Use Scenario: Input-stage protection of PoE-powered equipment receiving DC power over twisted-pair cabling. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail upstream of DC/DC converter. Use Value: Clamps induced lightning surges to 77.4 V while dissipating 600 W peak, enabling compliance with IEC 61000-4-5. |
Use Scenario: Protection of 4–20 mA current loop receivers and ADC front-ends from field-wiring transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential input terminals of instrumentation amplifier. Use Value: Maintains ≤1.0 µA reverse leakage at 48 V standoff, preserving measurement accuracy and offset stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CAHM3_B/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU automotive Tier 1). | Direct substitution if halogen-free requirement applies; same thermal and clamping performance. |
| SMCJ48CAHE3_A/I | Same VWM/VC but in larger SMC (DO-214AB) package with higher PPPM (1500 W) and lower RθJA (50 °C/W). | Used where higher surge margin or improved thermal dissipation is needed, e.g., in high-power industrial inverters. | Select when 600 W is insufficient or board layout allows larger footprint; not pin-compatible due to different package. |
Compared with SMBJ48CAHE3_B/I, the HM3 variant offers identical protection performance with halogen-free construction, while the SMCJ48CAHE3_A/I provides 2.5× higher pulse power in a physically incompatible package-requiring PCB redesign but enabling more robust surge handling.
Availability
SMBJ48CAHE3_B/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply with AEC-Q101 qualification and UL 497B recognition.
Supply support for SMBJ48CAHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets cost-effective, high-reliability transient suppression in space-constrained surface-mount applications across automotive, industrial, and telecom markets, with AEC-Q101 variants engineered for under-hood and chassis-mounted environments.
FAQ
What is the clamping voltage of SMBJ48CAHE3_B/I at its rated peak pulse current?
The SMBJ48CAHE3_B/I has a maximum clamping voltage (VC) of 77.4 V at 7.8 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value defines the upper voltage limit imposed on protected circuitry during transient events and is measured per ANSI/IEEE C62.35 standards. The SMBJ48CAHE3_B/I maintains this clamping performance across its full operating temperature range.
Is SMBJ48CAHE3_B/I suitable for automotive applications?
Yes, SMBJ48CAHE3_B/I is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix "HE3". It undergoes stress testing including high-temperature reverse bias, temperature cycling, and surge endurance per JESD22-A108 and JESD22-A110. The SMBJ48CAHE3_B/I is commonly deployed in body control modules, infotainment power rails, and sensor interfaces where transient immunity and long-term reliability are critical.
How does the bidirectional configuration of SMBJ48CAHE3_B/I affect its circuit placement?
The bidirectional configuration of SMBJ48CAHE3_B/I means it has no polarity marking and functions identically in both directions-ideal for AC-coupled lines, differential buses (e.g., RS-485), or floating references. Unlike unidirectional TVS diodes, the SMBJ48CAHE3_B/I can be placed without regard to anode/cathode orientation, simplifying layout and reducing assembly errors. Its symmetric VBR and VC characteristics ensure consistent clamping for positive and negative transients.
What is the thermal resistance of SMBJ48CAHE3_B/I, and how does it impact PCB layout?
The SMBJ48CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's DO-214AA specification. To maintain safe junction temperatures under repetitive surge conditions, designers must allocate adequate copper area and consider airflow-especially since SMBJ48CAHE3_B/I operates up to +150 °C junction temperature.
Does SMBJ48CAHE3_B/I meet any safety certification standards?
Yes, SMBJ48CAHE3_B/I is Underwriters Laboratories (UL) recognized under standard UL 497B for surge protective devices, with file number E136766. It is certified for both unidirectional and bidirectional configurations. This recognition validates its suitability in safety-critical telecom and industrial applications where third-party verification of transient suppression performance and flammability (UL 94 V-0 molding compound) is required.
SMBJ48CAHE3_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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
SMBJ48CAHE3_B/I FAQ
1.How can I place an order for SMBJ48CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48CAHE3_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 SMBJ48CAHE3_B/I reliable?
The price and inventory of SMBJ48CAHE3_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 SMBJ48CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ48CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48CAHE3_B/I?
SMBJ48CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48CAHE3_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 SMBJ48CAHE3_B/I?
For technical support, including SMBJ48CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ48CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ48CAHE3_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 SMBJ48CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ48CAHE3_B/I?
All SMBJ48CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48CAHE3_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 SMBJ48CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ48CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48CAHE3_B/I Tags
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Diodes Incorporated
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