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Vishay General Semiconductor - Diodes Division SMBJ48AHE3_B/I
- Part No.:
- SMBJ48AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48AHE3_B/I.pdf
- Description:
- 600W,48V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,458
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Product details
Overview
SMBJ48AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 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 (10/1000 µs waveform), used in automotive power rail protection and industrial sensor interface circuits.
For engineers reviewing the SMBJ48AHE3_B/I datasheet, SMBJ48AHE3_B/I pinout, SMBJ48AHE3_B/I application, or SMBJ48AHE3_B/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and real-world design context for surge immunity validation in 12 V/24 V automotive subsystems and I/O protection of microcontroller-based controllers.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping device triggered by reverse-biased avalanche breakdown. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 µA at VWM), with fast response time <1 ns and low incremental surge resistance enabling effective suppression of 8.3 ms half-sine surges up to 100 A (IFSM).
The SMBJ48AHE3_B/I is rated for 600 W peak pulse power under standardized 10/1000 µs waveform, derated linearly above 25 °C ambient per Fig. 2, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its cathode-band polarity marking aligns with standard SMB layout conventions for automated placement and optical inspection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; sets threshold for 12 V/24 V system rail protection. |
| VBR min/max | 53.3 V / 58.9 V at IT = 1 mA - Confirmed breakdown window ensures reliable triggering without premature conduction. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by downstream ICs. |
| PPPM | 600 W - Peak surge energy handling capacity; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) compliance when properly laid out. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on 0.2" × 0.2" copper pads; informs heatsinking requirements for repetitive surge duty. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1, 260 °C reflow peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line (e.g., 24 V rail); conducts surge current to ground during overvoltage events. |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping path with minimal inductance for sub-ns response. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges without derating in compact layouts. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics use including engine control modules, body control units, and ADAS sensor interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes overvoltage stress on protected MOSFETs or microcontrollers during transient events. |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free assembly without preconditioning; eliminates moisture-related popcorning risk. |
| Glass passivated junction | Ensures long-term VBR stability and low leakage drift across temperature and lifetime stress conditions. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients (ISO 7637-2 Pulse 5a) on 24 V battery-fed ECUs in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between battery rail and DC-DC input, conducting only during positive overvoltage events. Use Value: Limits voltage to ≤77.4 V during 100 V/100 ms surges, preventing damage to upstream regulators and MCU power supplies. |
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting induced lightning-induced surges on twisted-pair field wiring. Use Value: Clamps transients within 1 ns while adding <0.5 pF capacitance, preserving signal integrity up to 1 MHz bandwidth. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding PoE-powered network switches against AC line coupling and external surge injection on 48 V DC inputs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC bus, coordinated with upstream MOVs and fuses. Use Value: Absorbs 600 W pulses without degradation, maintaining VWM stability across 1000+ surge cycles per JEDEC JESD22-A114. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers from inductive kickback during BLDC motor commutation in smart home appliances. IC Role / Device Role / Timing Role: Localized TVS at motor driver IC outputs, placed within 5 mm of power FET source pins. Use Value: Limits flyback spikes to 77.4 V, preventing gate oxide rupture in 60 V-rated MOSFETs and ensuring ASIL-B functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48AHM3_B/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No difference in circuit function or layout; selected where halogen-free compliance is mandated by OEM or regional regulations. | Choose SMBJ48AHM3_B/I when RoHS + halogen-free material declaration is required for final product certification. |
| SMCJ48AHE3_A/I | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher RθJA (50 °C/W) and 1500 W PPPM rating. | Used where higher single-pulse energy absorption or improved thermal margin is needed, e.g., in high-reliability industrial UPS systems. | Choose SMCJ48AHE3_A/I when board space allows and >600 W surge handling or lower thermal resistance is critical. |
Compared with SMBJ48AHE3_B/I, SMBJ48AHM3_B/I offers identical performance with halogen-free construction, while SMCJ48AHE3_A/I trades compact size for higher power handling and better thermal dissipation-enabling selection based on mechanical constraints and surge severity requirements.
Availability
SMBJ48AHE3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power input protection requiring stable component supply, AEC-Q101 traceability, and consistent surge immunity performance across production batches.
Supply support for SMBJ48AHE3_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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series is engineered for high-speed transient suppression in automotive, industrial, and communications systems, delivering repeatable clamping performance under harsh electrical and thermal stress conditions.
FAQ
What is the maximum clamping voltage of SMBJ48AHE3_B/I at its rated peak pulse current?
The SMBJ48AHE3_B/I has a maximum clamping voltage (VC) of 77.4 V at its specified peak pulse current (IPPM) of 7.8 A under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ48AHE3_B/I maintains this clamping performance across its full operating temperature range of −55 to +150 °C.
Is SMBJ48AHE3_B/I qualified for automotive applications?
Yes, SMBJ48AHE3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88392 (Revision 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making SMBJ48AHE3_B/I suitable for under-hood and chassis-mounted automotive electronics where reliability under thermal and electrical stress is mandatory.
What does the "_B/I" suffix indicate in SMBJ48AHE3_B/I?
The "_B/I" suffix in SMBJ48AHE3_B/I denotes packaging configuration: "B" indicates tape-and-reel packaging per Vishay's internal revision coding, and "I" specifies 13-inch diameter reels with 3200 units per reel. This matches the preferred delivery mode listed in the Ordering Information table on page 3 of datasheet 88392, confirming compatibility with high-volume SMT assembly lines.
How does SMBJ48AHE3_B/I compare to bidirectional variants like SMBJ48CA?
SMBJ48AHE3_B/I is unidirectional and features a cathode band for polarity identification, whereas SMBJ48CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The SMBJ48AHE3_B/I exhibits forward voltage drop (VF ≤ 3.5 V at 50 A), while SMBJ48CA does not conduct in forward bias. Use SMBJ48AHE3_B/I for DC rail protection where polarity is fixed; choose SMBJ48CA only for AC-coupled or floating signal lines.
What is the thermal resistance junction-to-ambient for SMBJ48AHE3_B/I?
The typical thermal resistance junction-to-ambient (RθJA) for SMBJ48AHE3_B/I is 100 °C/W, measured on a standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad layout per JEDEC standards. This value assumes no additional heatsinking and guides thermal design for repetitive surge duty cycles; derating curves in Figure 2 of datasheet 88392 must be applied when ambient temperature exceeds 25 °C.
SMBJ48AHE3_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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ48AHE3_B/I FAQ
1.How can I place an order for SMBJ48AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48AHE3_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 SMBJ48AHE3_B/I reliable?
The price and inventory of SMBJ48AHE3_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 SMBJ48AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ48AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48AHE3_B/I?
SMBJ48AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48AHE3_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 SMBJ48AHE3_B/I?
For technical support, including SMBJ48AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48AHE3_B/I requirements.
6.How does Aetrix verify that SMBJ48AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ48AHE3_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 SMBJ48AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ48AHE3_B/I?
All SMBJ48AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48AHE3_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 SMBJ48AHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ48AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48AHE3_B/I Tags
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