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Vishay General Semiconductor - Diodes Division SMBJ48CAHE3_A/I
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- Part No.:
- SMBJ48CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48CAHE3_A/I.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,016
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Product details
Overview
SMBJ48CAHE3_A/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 a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR) at 1 mA, 77.4 V maximum clamping voltage (VC) at 7.8 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ48CAHE3_A/I datasheet, SMBJ48CAHE3_A/I pinout, SMBJ48CAHE3_A/I application, or SMBJ48CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 °C to +150 °C), and compliance with UL 497B for surge protection systems.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche breakdown in both directions, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports fast transient response under high-energy surges.
The SMBJ48CAHE3_A/I is rated for 600 W peak pulse power (10/1000 µs), derated linearly above 25 °C ambient per Fig. 2, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It is AEC-Q101 qualified (automotive-grade), RoHS-compliant, and halogen-free per Vishay's HM3/HE3 suffix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR min/max | 53.3 V / 58.9 V at IT = 1 mA - Confirmed breakdown range ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamped voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream components. |
| PPPM | 600 W - Peak transient energy absorption capacity with standard 10/1000 µs waveform; validates robustness against IEC 61000-4-5 surges. |
| TJ max | +150 °C - Maximum junction temperature rating enables operation in high-ambient environments like automotive engine bays or industrial controls. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs heatsinking requirements. |
| Leakage ID | <1.0 µA at 48 V - Low reverse leakage preserves system efficiency and avoids false triggering in high-impedance circuits. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path for both positive and negative surges; no cathode band marking required. |
| Cathode | Transient return path (bidirectional) | Electrically identical to anode in bidirectional mode; terminals are interchangeable for layout flexibility. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain and body electronics; supports extended temperature and reliability requirements. |
| 600 W peak pulse power | Withstands high-energy transients per IEC 61000-4-5 Level 4 (4 kV line-to-line) when properly mounted on recommended PCB copper area. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during clamping - critical for protecting 48 V nominal systems with tight IC voltage tolerances. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with automated assembly processes up to 260 °C peak temperature. |
| UL 497B recognized | Qualified for use in telecom and industrial surge protection modules requiring third-party safety certification. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Suppresses load-dump and inductive switching spikes on 48 V auxiliary rails in PLC power stages and motor drivers. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed across input bus to clamp transients before they reach DC/DC controllers and gate drivers. Use Value: Limits clamped voltage to 77.4 V, preventing damage to 80 V-rated MOSFETs and ensuring uninterrupted operation during 100 V/50 ms load dump events. |
Use Scenario: Protects LIN and CAN FD signal lines and microcontroller I/O pins from ESD and battery reversal-induced surges in BCM units. IC Role / Device Role / Timing Role: Standoff-rated TVS placed at connector interface to shunt fast transients (<1 ns rise time) before propagation into sensitive analog front-ends. Use Value: Sub-1 µA leakage at 48 V avoids signal distortion on 12 V/48 V dual-battery sensor interfaces; AEC-Q101 qualification ensures field reliability. |
| Telecom Base Station Power Interface | Renewable Energy Inverter DC Link |
|
Use Scenario: Shields PoE-powered remote radio units and baseband processors from lightning-induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Primary clamping device in multi-stage protection scheme, coordinated with GDTs and MOVs for staged energy diversion. Use Value: 600 W PPPM rating allows coordination with upstream coarse protectors; UL 497B recognition satisfies telecom infrastructure safety mandates. |
Use Scenario: Guards IGBT gate drivers and isolated feedback circuits against voltage reversals and grid-switching transients in solar string inverters. IC Role / Device Role / Timing Role: Bidirectional suppressor on isolated 48 V auxiliary supply rail feeding optocouplers and bootstrap capacitors. Use Value: Symmetrical clamping prevents latch-up during bipolar transients; +150 °C TJ rating supports operation near heat-generating power stages. |
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 | Same electrical specs and SMB package; halogen-free, RoHS-compliant, but not AEC-Q101 qualified. | Lacks automotive qualification; suitable for commercial/industrial use only where automotive reliability is not mandated. | Select when cost-sensitive industrial designs require halogen-free compliance without automotive testing overhead. |
| SMCJ48CAHE3_A/I | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher PPPM (1500 W) and lower RθJA (50 °C/W). | Better thermal performance and surge handling; requires larger PCB footprint and different pad layout. | Choose when system-level surge tests exceed 600 W or thermal constraints demand lower junction temperature rise. |
Compared with SMBJ48CAHE3_A/I, the M3/5B variant offers identical protection performance without automotive qualification, while the SMCJ48CAHE3_A/I delivers higher surge capacity and improved thermal dissipation at the cost of board space - enabling trade-offs between qualification scope, power handling, and layout density.
Availability
SMBJ48CAHE3_A/I is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, telecom base station interfaces, and renewable energy inverter DC links requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ48CAHE3_A/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 power MOSFETs for high-reliability applications.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where repeatable clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ48CAHE3_A/I?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ48CAHE3_A/I provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ48A), it has no polarity marking and functions identically in either orientation - essential for AC-coupled or floating signal lines where voltage polarity is undefined.
Is SMBJ48CAHE3_A/I suitable for automotive applications?
Yes, SMBJ48CAHE3_A/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and Vishay documentation. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life - making SMBJ48CAHE3_A/I appropriate for under-hood and chassis-mounted automotive electronics including body control modules and ADAS power supplies.
What is the maximum clamping voltage of SMBJ48CAHE3_A/I and how is it measured?
The maximum clamping voltage (VC) of SMBJ48CAHE3_A/I is 77.4 V, measured at a peak pulse current (IPPM) of 7.8 A using the standardized 10/1000 µs double-exponential waveform. This value represents the highest voltage that appears across SMBJ48CAHE3_A/I during a surge event - a critical parameter for ensuring protected ICs remain within their absolute maximum ratings.
How does the thermal resistance of SMBJ48CAHE3_A/I affect PCB layout?
SMBJ48CAHE3_A/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. To maintain safe junction temperatures, designers must allocate sufficient copper area and avoid excessive power dissipation in sustained fault conditions - especially important in enclosed enclosures or high-ambient environments where SMBJ48CAHE3_A/I may operate near its +150 °C TJ limit.
Does SMBJ48CAHE3_A/I meet any safety certifications?
Yes, SMBJ48CAHE3_A/I is Underwriters Laboratories (UL) recognized under file E136766 for both unidirectional and bidirectional configurations, complying with UL 497B for primary protectors in telecommunications and data line applications. This certification validates its suitability in safety-critical surge protection assemblies requiring third-party approval.
SMBJ48CAHE3_A/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:
- Obsolete
- 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_A/I FAQ
1.How can I place an order for SMBJ48CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48CAHE3_A/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_A/I reliable?
The price and inventory of SMBJ48CAHE3_A/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_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ48CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48CAHE3_A/I?
SMBJ48CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48CAHE3_A/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_A/I?
For technical support, including SMBJ48CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ48CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ48CAHE3_A/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_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ48CAHE3_A/I?
All SMBJ48CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48CAHE3_A/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_A/I part is unused and in its original packaging.
Return procedure for SMBJ48CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48CAHE3_A/I Tags
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