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Vishay General Semiconductor - Diodes Division SMBJ48CAHE3/5B
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- Part No.:
- SMBJ48CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48CAHE3/5B.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,904
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Product details
Overview
SMBJ48CAHE3/5B 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 48 V stand-off voltage (VWM), 77.4 V maximum clamping voltage (VC) at 7.8 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), commonly deployed to protect MOSFETs and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ48CAHE3/5B datasheet, SMBJ48CAHE3/5B pinout, SMBJ48CAHE3/5B application, or SMBJ48CAHE3/5B equivalent, key selection criteria include bidirectional surge handling capability, AEC-Q101 qualification status, clamping ratio (VC/VWM = 1.61), thermal resistance (RθJA = 100 °C/W), and RoHS-compliant matte tin-plated leads compatible with J-STD-002 soldering standards.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 53.3–58.9 V (min/max) under 1 mA test current. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance, enabling consistent clamping performance during repetitive 10/1000 µs transients at 0.01% duty cycle.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and supports automated placement due to its low-profile SMB package. AEC-Q101 qualification confirms suitability for automotive powertrain and body electronics where reliability under thermal cycling and mechanical shock is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (min/max) | 53.3 V / 58.9 V - Breakdown occurs within this range at 1 mA; ensures predictable turn-on during overvoltage events |
| VC @ IPPM | 77.4 V - Clamped voltage at 7.8 A peak pulse; limits downstream IC stress during 600 W transient absorption |
| IPPM | 7.8 A - Peak surge current supported with 10/1000 µs waveform; determines minimum trace width and PCB copper pad sizing |
| PPPM | 600 W - Transient power dissipation capacity; enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) |
| TJ max. | +150 °C - Maximum junction temperature; sets thermal derating limit for sustained power dissipation in enclosed environments |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; guides heatsinking requirements for repeated surge events |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; case dimensions 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated leads compliant with J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative half-cycle; connects to protected line or ground return path |
| Cathode | Transient current entry (positive polarity) | Accepts reverse surge current during positive half-cycle; symmetrical conduction enables bidirectional clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power supplies, with extended temperature cycling and humidity testing |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combination wave surges up to 4 kV without degradation when mounted per recommended pad layout |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage exposure to downstream components such as microcontrollers and gate drivers during transient events |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile compatibility without baking, reducing manufacturing overhead |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at VWM) across temperature and lifetime, critical for low-power sensor nodes |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of H-bridge MOSFET gates and current-sense amplifier inputs against inductive kickback from 24 V DC motors. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between gate driver output and MOSFET gate, limiting transient excursions to <77.4 V. Use Value: Prevents gate oxide rupture and latch-up in logic-level MOSFETs during rapid PWM switching, extending field reliability beyond 10 years. |
Use Scenario: Surge suppression on LIN bus lines and window lift motor power feeds in door modules exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Primary TVS on 12 V supply rail and LIN data line, absorbing 10/1000 µs pulses up to 600 W without failure. Use Value: Maintains communication integrity during ISO 7637-2 Pulse 5a (load dump) and ensures compliance with OEM EMC specifications. |
| Telecom Power Supply Inputs | Industrial Sensor Signal Conditioning |
Use Scenario: Input-stage protection for 48 V telecom rectifiers subjected to lightning-induced surges on AC mains and battery backup lines. IC Role / Device Role / Timing Role: First-line transient suppressor before bulk capacitance and DC-DC converters, clamping transients before they reach regulation circuitry. Use Value: Enables single-stage protection architecture meeting GR-1089-CORE Level 3 (4 kV differential mode) without additional MOVs or gas discharge tubes. |
Use Scenario: Protection of analog front-end inputs (e.g., 4–20 mA loop receivers, thermocouple amplifiers) in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance (CJ ≈ 100 pF at 0 V) bidirectional clamp on signal lines, minimizing distortion of slow-varying process signals. Use Value: Preserves signal fidelity while suppressing ESD (IEC 61000-4-2 ±8 kV contact) and fast transients (IEC 61000-4-4 ±2 kV) without adding filtering delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CA-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification; same SMB package and thermal performance | No functional difference; selected when halogen-free material compliance is mandated by end-equipment environmental policy | Choose SMBJ48CA-M3/5B if halogen-free certification (e.g., IEC 61249-2-21) is required for final product listing. |
| SMCJ48CAHE3/5B | Same VWM, VBR, and VC, but in larger SMC (DO-214AB) package; higher IPPM (12.3 A) and PPPM (1500 W); RθJA = 50 °C/W | Supports higher-energy transients and better thermal dissipation; requires larger PCB footprint and different pad layout | Choose SMCJ48CAHE3/5B only when system-level surge testing exceeds 600 W or ambient temperature exceeds 85 °C with sustained surge duty. |
Compared with SMBJ48CAHE3/5B, SMBJ48CA-M3/5B offers identical protection performance with halogen-free construction, while SMCJ48CAHE3/5B trades board space for 2.5× higher surge capacity and improved thermal management-neither is pin-compatible, and layout changes are required for either alternative.
Availability
SMBJ48CAHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supply inputs, and industrial sensor signal conditioning requiring stable component supply across multi-year production cycles.
Supply support for SMBJ48CAHE3/5B 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, and protection devices with emphasis on high-reliability, automotive-grade, and industry-standard packaging.
The SMBJ series is engineered for robust transient suppression in harsh environments, targeting applications demanding AEC-Q101 qualification, precise clamping, and long-term stability under thermal and electrical stress.
FAQ
What is the clamping voltage of SMBJ48CAHE3/5B at its rated peak pulse current?
The SMBJ48CAHE3/5B has a maximum clamping voltage (VC) of 77.4 V at 7.8 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ48CAHE3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ48CAHE3/5B suitable for automotive applications?
Yes, SMBJ48CAHE3/5B is AEC-Q101 qualified and explicitly listed in Vishay's automotive ordering codes (suffix HE3 denotes RoHS-compliant and AEC-Q101 qualified). It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and mechanical shock validation-making it appropriate for under-hood and chassis-mounted systems such as body control modules and power distribution units. The SMBJ48CAHE3/5B meets automotive-grade reliability requirements without derating.
How does the bidirectional configuration of SMBJ48CAHE3/5B affect its circuit placement?
The SMBJ48CAHE3/5B has no polarity marking and conducts identically in both directions, allowing placement across any two nodes subject to bidirectional transients-such as AC power lines, differential data buses (LIN, CAN), or floating sensor outputs. Unlike unidirectional TVS diodes, it eliminates orientation concerns during automated assembly and avoids risk of incorrect installation. The SMBJ48CAHE3/5B achieves symmetrical clamping with matched VBR min/max in both polarities (53.3–58.9 V), ensuring balanced protection.
What is the thermal resistance of SMBJ48CAHE3/5B, and how does it impact layout design?
The SMBJ48CAHE3/5B 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 directly informs PCB copper area requirements: reducing thermal resistance requires increasing pad size or adding internal thermal vias. For applications with repetitive surges, the SMBJ48CAHE3/5B must be placed away from heat sources and adjacent to ground planes to maintain junction temperature below 150 °C under worst-case duty cycle.
Does SMBJ48CAHE3/5B meet lead-free soldering standards?
Yes, SMBJ48CAHE3/5B is RoHS-compliant and rated for lead-free reflow with a maximum peak temperature of 260 °C (MSL Level 1 per J-STD-020). Its matte tin-plated leads meet JESD 22-B102 for solderability and JESD 201 Class 2 for whisker resistance. The SMBJ48CAHE3/5B supports standard Pb-free reflow profiles without pre-baking and maintains mechanical and electrical integrity after multiple thermal cycles-critical for high-yield SMT manufacturing.
SMBJ48CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ48CAHE3/5B FAQ
1.How can I place an order for SMBJ48CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48CAHE3/5B 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 SMBJ48CAHE3/5B reliable?
The price and inventory of SMBJ48CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ48CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48CAHE3/5B?
SMBJ48CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48CAHE3/5B 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 SMBJ48CAHE3/5B?
For technical support, including SMBJ48CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48CAHE3/5B requirements.
6.How does Aetrix verify that SMBJ48CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ48CAHE3/5B 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 SMBJ48CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ48CAHE3/5B?
All SMBJ48CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48CAHE3/5B, 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 SMBJ48CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ48CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48CAHE3/5B Tags
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