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Vishay General Semiconductor - Diodes Division SMBG48CAHE3/5B
- Part No.:
- SMBG48CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG48CAHE3/5B.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,207
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Product details
Overview
SMBG48CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. 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, and 600 W peak pulse power rating with 10/1000 μs waveform - deployed on signal lines and power rails in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMBG48CAHE3/5B datasheet, SMBG48CAHE3/5B pinout, SMBG48CAHE3/5B application, or SMBG48CAHE3/5B equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance data, junction capacitance behavior, and real-world protection use cases - all aligned to Vishay's official 88456 document revision 09-Jan-2024.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR, VC, and IPPM characteristics in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns), while the low incremental surge resistance enables effective clamping during ESD and lightning-induced transients.
Thermally, it exhibits RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads) and RθJL = 20 °C/W, supporting reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and is AEC-Q101 qualified - confirming suitability for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 53.3 V / 58.9 V at IT = 1 mA - Confirmed breakdown threshold range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamping voltage under 10/1000 μs surge; limits downstream voltage stress to safe levels. |
| PPPM | 600 W - Peak pulse power handling capability; supports high-energy transients without failure. |
| IPPM | 7.8 A - Peak pulse current capacity with 10/1000 μs waveform; determines survivability against defined surge profiles. |
| Junction Temp Range | −55 °C to +150 °C - Enables deployment in extended-temperature automotive and industrial applications. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode (bidirectional) | One side of symmetrical PN junction; connects to line under protection without polarity constraint. |
| Terminal 2 | Cathode (bidirectional) | Other side of symmetrical PN junction; completes bidirectional clamping path across protected node. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables suppression of high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation in automotive power nets. |
| AEC-Q101 qualification | Confirms long-term reliability under automotive stress conditions including thermal cycling, humidity, and mechanical shock. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping - critical for protecting 48 V system ICs with tight absolute maximum ratings. |
| MSL Level 1, 260 °C reflow compatible | Supports standard SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| Junction capacitance <100 pF @ 0 V | Preserves signal integrity on high-speed sensor lines (e.g., CAN FD, LIN) without introducing excessive loading. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery rail inputs in ADAS domain controllers from load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤77.4 V, preventing damage to downstream 65 V-rated buck controllers and enabling compliance with ISO 16750-2. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on 4–20 mA current loop outputs exposed to relay switching noise. Use Value: Sub-100 pF capacitance avoids signal distortion; 77.4 V clamping prevents op-amp saturation during 1 kV EFT bursts. |
| Telecom Power Feeds | Consumer USB-C Power Delivery |
Use Scenario: Safeguarding PoE++ (IEEE 802.3bt Type 4) 57 V power inputs in network switches against induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus after isolation transformer and rectifier. Use Value: Withstands repetitive 600 W pulses at 0.01% duty cycle, maintaining protection margin across multi-port switch chassis. |
Use Scenario: Secondary-side transient suppression on USB-C VBUS lines in portable docking stations supporting 48 V PPS. IC Role / Device Role / Timing Role: Fast-response TVS placed immediately upstream of USB PD controller and load switch. Use Value: 1 ns response time and 77.4 V clamping prevent latch-up in 60 V-rated PD controllers during hot-plug ESD events. |
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-E3/5B | Same VWM (48 V), but lower PPPM = 600 W (same), higher VC = 77.4 V (identical), yet rated only to 125 °C junction temp (vs. 150 °C). | Lacks AEC-Q101 qualification; not validated for automotive under-hood use. | Select SMBG48CAHE3/5B when automotive qualification, extended temperature operation, or MSL Level 1 reflow assurance is required. |
| SMCJ48CAHE3/5B | Higher PPPM = 1500 W, same VWM/VBR, larger SMC (DO-214AB) package (7.11 mm × 6.22 mm vs. SMBG's 4.57 mm × 3.94 mm). | Occupies ~2.5× PCB area; suited for higher-energy surge zones like main board inputs, not space-constrained sensor nodes. | Choose SMBG48CAHE3/5B where board space is constrained and 600 W suffices - e.g., distributed protection near ICs rather than bulk front-end suppression. |
Compared with SMBJ48CA-E3/5B and SMCJ48CAHE3/5B, SMBG48CAHE3/5B uniquely balances AEC-Q101 compliance, compact SMBG footprint, and verified 150 °C operation - making it optimal for distributed, high-reliability 48 V system protection where size and qualification are co-priorities.
Availability
SMBG48CAHE3/5B is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor module production, and telecom power feed protection requiring stable component supply and full traceability.
Supply support for SMBG48CAHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBG series was engineered for high-power, surface-mount transient suppression in space-constrained, high-reliability systems - particularly targeting automotive, industrial, and telecom infrastructure where AEC-Q101 validation and consistent clamping behavior are mandatory.
FAQ
What is the clamping voltage of SMBG48CAHE3/5B at its rated peak pulse current?
The SMBG48CAHE3/5B has a maximum clamping voltage (VC) of 77.4 V at its rated peak pulse current (IPPM) of 7.8 A, measured using the standardized 10/1000 μs double-exponential waveform. This value is confirmed in Vishay's Document Number 88456, Table on page 2, and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBG48CAHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBG48CAHE3/5B suitable for automotive applications?
Yes, SMBG48CAHE3/5B is AEC-Q101 qualified - explicitly stated in the "MECHANICAL DATA" section of Vishay's 88456 datasheet - and rated for junction temperatures up to +150 °C. Its construction includes glass-passivated junctions, matte tin-plated leads compliant with J-STD-002, and MSL Level 1 moisture sensitivity. These attributes make SMBG48CAHE3/5B appropriate for under-hood and body-control module applications where reliability under thermal and mechanical stress is critical.
What does the "HE3" suffix indicate in SMBG48CAHE3/5B?
The "HE3" suffix in SMBG48CAHE3/5B denotes RoHS-compliant construction with AEC-Q101 qualification - per Vishay's ordering nomenclature in the "MECHANICAL DATA" section of Document 88456. "H" signifies AEC-Q101 qualification, "E3" indicates RoHS compliance and industrial-grade reliability. This distinguishes it from base variants like "E3" (RoHS, non-AEC-Q101) or "M3" (halogen-free, RoHS). The "5B" denotes 13-inch tape-and-reel packaging with 3200 units per reel.
How does SMBG48CAHE3/5B differ from unidirectional SMBG48AHE3/5B?
SMBG48CAHE3/5B is bidirectional, meaning it clamps symmetrically in both polarities with identical VBR, VC, and IPPM values - ideal for AC-coupled or floating signal lines. In contrast, SMBG48AHE3/5B is unidirectional, featuring a cathode band marking and conducting only in reverse bias; it also supports 100 A IFSM (8.3 ms surge), which SMBG48CAHE3/5B does not specify. The "CA" suffix explicitly identifies the bidirectional variant per Vishay's naming convention in the datasheet header.
What is the thermal resistance of SMBG48CAHE3/5B, and how does it affect layout?
SMBG48CAHE3/5B 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, as specified in the "THERMAL CHARACTERISTICS" table of Document 88456. To achieve this rating, PCB layout must allocate minimum recommended pad area and avoid excessive thermal isolation. For high-repetition surge scenarios, designers should verify junction temperature rise using RθJA and actual power dissipation - ensuring SMBG48CAHE3/5B stays within its −55 °C to +150 °C operating range.
SMBG48CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG48CAHE3/5B FAQ
1.How can I place an order for SMBG48CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG48CAHE3/5B 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 SMBG48CAHE3/5B reliable?
The price and inventory of SMBG48CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG48CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG48CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG48CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG48CAHE3/5B?
SMBG48CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG48CAHE3/5B 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 SMBG48CAHE3/5B?
For technical support, including SMBG48CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG48CAHE3/5B requirements.
6.How does Aetrix verify that SMBG48CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG48CAHE3/5B 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 SMBG48CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG48CAHE3/5B?
All SMBG48CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG48CAHE3/5B, 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 SMBG48CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBG48CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG48CAHE3/5B Tags
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