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Vishay General Semiconductor - Diodes Division SMBJ48AHE3_A/I
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- Part No.:
- SMBJ48AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48AHE3_A/I.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,948
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Product details
Overview
SMBJ48AHE3_A/I from Vishay General Semiconductor is a unidirectional 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 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 - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ48AHE3_A/I datasheet, SMBJ48AHE3_A/I pinout, SMBJ48AHE3_A/I application, or SMBJ48AHE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and compliance with UL 497B surge protector classification.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, conducting only when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the low incremental surge resistance enables effective energy diversion during transient events.
The SMBJ48AHE3_A/I is rated for 600 W peak pulse power under 10/1000 µs waveform with 0.01 % duty cycle, and supports repetitive surge handling when thermally managed. Its 150 °C maximum junction temperature and MSL Level 1 moisture sensitivity rating confirm suitability for lead-free reflow processes up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 53.3 V / 58.9 V at IT = 1 mA - defines reliable conduction onset window under standardized test conditions |
| VC @ IPPM | 77.4 V at 7.8 A - clamped voltage seen by protected circuit during full-rated 600 W transient |
| PPPM | 600 W - peak transient energy absorption capability with 10/1000 µs waveform |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves system standby power integrity |
| TJ max | +150 °C - enables operation in high-temperature industrial and automotive under-hood environments |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads |
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. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connects to protected line; conducts surge current to ground when V > VBR |
| Anode (unbanded end) | Reference node | Typically tied to system ground or lower-potential rail for unidirectional clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Ensures consistent VBR tolerance and long-term stability under thermal stress |
| MSL Level 1 rating | Allows unlimited floor life and compatibility with standard lead-free reflow profiles (peak 260 °C) |
| UL 497B recognized | Meets Underwriters Laboratories requirements for telecom and industrial surge protection devices |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV/2 Ω coupling) without degradation |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) Signal Lines |
|---|---|
|
Use Scenario: Protecting 48 V DC input rails against load dump and inductive switching transients in programmable logic controllers and motor drives. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed across input terminals to limit voltage excursions below downstream regulator and controller ratings. Use Value: Prevents latch-up or permanent damage to 60 V-rated DC-DC converters and microcontrollers during 100 V/50 ms load dump events. |
Use Scenario: Safeguarding LIN bus and sensor analog inputs (e.g., temperature, pressure) in BCMs exposed to battery transients and ESD. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on each signal line, referenced to chassis ground. Use Value: Maintains signal integrity by clamping fast-rising spikes (<1 ns rise time) to <78 V while adding <10 pF capacitance at zero bias. |
| Telecom PoE Interface Protection | Consumer Appliance Motor Drive Gate Protection |
|
Use Scenario: Shielding Power over Ethernet (PoE) data pairs and power conductors from lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMBJ48AHE3_A/I used on DC power side only due to unidirectional polarity. Use Value: Limits voltage on 48 V PoE PSE output to safe levels during Category 4 (4 kV) surge tests per IEC 61000-4-5. |
Use Scenario: Guarding gate-source terminals of N-channel MOSFETs driving brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Clamps negative-going gate voltage spikes caused by transformer leakage inductance during turn-off. Use Value: Prevents gate oxide rupture by limiting VGS reverse excursion to <78 V, supporting 60 V-rated MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48AHM3_A/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification | No functional difference; selected where halogen-free materials are mandated in final assembly | Direct material substitution when environmental compliance requires bromine/chlorine-free molding compound |
| SMBJ48A-E3/5B | Commercial-grade (non-AEC-Q101), same SMB package and electrical parameters, 13" tape/reel packaging | Lacks automotive qualification; suitable for industrial/commercial designs without AEC validation requirements | Cost-optimized alternative for non-automotive applications where AEC-Q101 is not required |
Compared with SMBJ48AHE3_A/I, SMBJ48AHM3_A/I offers identical performance with halogen-free construction, while SMBJ48A-E3/5B provides equivalent clamping and power rating without automotive qualification - enabling trade-offs between compliance scope, material content, and cost.
Availability
SMBJ48AHE3_A/I is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom PoE interfaces, and consumer appliance motor drives requiring stable component supply with AEC-Q101 assurance and UL recognition.
Supply support for SMBJ48AHE3_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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series targets robust transient suppression in harsh environments, engineered for automotive, industrial, and telecom systems where failure modes must be mitigated through certified clamping performance and thermal resilience.
FAQ
What is the maximum clamping voltage of SMBJ48AHE3_A/I at its rated peak pulse current?
The SMBJ48AHE3_A/I has a maximum clamping voltage (VC) of 77.4 V at 7.8 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value ensures protected circuits remain within safe operating limits during worst-case transients, and is verified per ANSI/IEEE C62.35 test methodology. The SMBJ48AHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMBJ48AHE3_A/I qualified for automotive applications?
Yes, SMBJ48AHE3_A/I is AEC-Q101 qualified, meaning it has passed stress tests including high-temperature reverse bias, temperature cycling, and ESD per automotive reliability standards. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction. This makes SMBJ48AHE3_A/I suitable for use in automotive body electronics, infotainment power rails, and other non-safety-critical vehicle subsystems.
What is the reverse leakage current specification for SMBJ48AHE3_A/I at its stand-off voltage?
The SMBJ48AHE3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 48 V stand-off voltage (VWM), tested at TA = 25 °C. This ultra-low leakage minimizes standby power loss in always-on systems and avoids false triggering in high-impedance sensing circuits. Leakage remains within specification up to +125 °C, with gradual increase governed by junction temperature.
Does SMBJ48AHE3_A/I have UL recognition, and for which standard?
Yes, SMBJ48AHE3_A/I carries Underwriters Laboratories recognition under UL 497B for surge protective devices, with file number E136766. This certification confirms compliance for use in telecommunications, industrial control, and commercial equipment subject to lightning and switching surge requirements. UL 497B covers both unidirectional and bidirectional variants in the SMBJ family.
What is the thermal resistance from junction to ambient for SMBJ48AHE3_A/I, and how is it measured?
The SMBJ48AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, measured with the device mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal on FR-4 PCB. This value assumes no additional heatsinking and defines the steady-state temperature rise above ambient at 5.0 W DC power dissipation. For pulsed operation, transient thermal impedance curves (Fig. 5) govern short-duration heating behavior.
SMBJ48AHE3_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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ48AHE3_A/I FAQ
1.How can I place an order for SMBJ48AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48AHE3_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 SMBJ48AHE3_A/I reliable?
The price and inventory of SMBJ48AHE3_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 SMBJ48AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ48AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48AHE3_A/I?
SMBJ48AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48AHE3_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 SMBJ48AHE3_A/I?
For technical support, including SMBJ48AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48AHE3_A/I requirements.
6.How does Aetrix verify that SMBJ48AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ48AHE3_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 SMBJ48AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ48AHE3_A/I?
All SMBJ48AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48AHE3_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 SMBJ48AHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ48AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48AHE3_A/I Tags
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