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Vishay General Semiconductor - Diodes Division SMBJ48HE3/52
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- Part No.:
- SMBJ48HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48HE3/52.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,023
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Product details
Overview
SMBJ48HE3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails 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, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives, automotive ECUs, and telecom power supplies.
For engineers reviewing the SMBJ48HE3/52 datasheet, SMBJ48HE3/52 pinout, SMBJ48HE3/52 application, or SMBJ48HE3/52 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping behavior under surge, and direct alternatives for ESD/surge-hardened board-level protection design.
Technical Context
This TVS diode operates as a unidirectional shunt protector: it remains high-impedance below 48 V and rapidly avalanches above its breakdown threshold to clamp transient energy into ground. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable VBR tolerance (±5% typical), while low incremental surge resistance enables effective suppression of fast-rising transients from inductive switching or lightning-induced surges.
Rated for 150 °C maximum junction temperature and MSL Level 1 (260 °C reflow), the SMBJ48HE3/52 supports automated SMT assembly and meets UL 497B recognition (QVGQ2). Its 100 °C/W junction-to-ambient thermal resistance requires minimal copper pad area (0.2" × 0.2") for full 600 W pulse handling per JEDEC test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin for 48 V systems. |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering without premature conduction. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamped voltage during 600 W transient; limits downstream IC stress to <80 V under worst-case surge. |
| PPPM | 600 W (10/1000 µs) - Peak surge power capability; sustains one-time or low-duty-cycle transients common in automotive load-dump or industrial relay switching. |
| IFSM | 100 A (8.3 ms half-sine) - Forward surge rating; supports high-energy fault currents without bond-wire fusing. |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood or enclosed industrial enclosures without derating. |
| RθJA | 100 °C/W - Thermal resistance to ambient on standard 0.2" × 0.2" pads; informs PCB copper area requirements for thermal management. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking. Matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or return path; completes clamping loop during transient events. |
| Cathode | High-side protected node | Connected to protected line (e.g., 48 V rail); conducts avalanche current to anode when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control units and body modules requiring extended temperature and reliability compliance. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 (4 kV) surge events on 48 V supply lines without degradation. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage overshoot during clamping - critical for protecting 60 V-rated MOSFETs and gate drivers. |
| MSL Level 1 moisture sensitivity | Enables standard reflow without baking; compatible with high-volume SMT production lines. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage across temperature and life cycles - essential for field-deployed equipment. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 48 V auxiliary power rails against back-EMF from brushed DC motors and solenoid switching. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between 48 V input and chassis ground to clamp inductive kickback transients. Use Value: Limits voltage spikes to ≤77.4 V, preventing damage to buck converters and microcontrollers rated for 60 V absolute maximum. |
Use Scenario: Surge suppression on LIN bus power lines and sensor supply rails in door modules and lighting controllers. IC Role / Device Role / Timing Role: Standby-mode protector on 12 V/48 V hybrid supply inputs, activated only during load-dump or jump-start events. Use Value: Withstands 100 A surge (8.3 ms) and maintains <1 µA leakage at 48 V, ensuring low quiescent current in always-on domains. |
| Telecom Power Feeds | Renewable Energy Inverters |
|
Use Scenario: Input-stage protection for PoE++ (IEEE 802.3bt) powered devices receiving up to 57 V DC over Ethernet cables. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input before DC-DC regulation, coordinated with upstream fuse timing. Use Value: Clamps transients within 1 ns response time while maintaining VWM margin above nominal 57 V, avoiding false triggering. |
Use Scenario: DC-link protection in solar string inverters where PV array open-circuit voltage reaches 600 V, but auxiliary 48 V control rails require localized suppression. IC Role / Device Role / Timing Role: Secondary-level TVS on isolated 48 V bias supply feeding gate drivers and isolation amplifiers. Use Value: AEC-Q101 qualification and 150 °C rating ensure reliability in outdoor enclosures exposed to wide ambient temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48A-E3/52 | Commercial-grade (non-AEC-Q101), identical electrical specs and SMB package. | Lacks automotive qualification; suitable for industrial/commercial designs without automotive reliability requirements. | Select when AEC-Q101 is not mandated and cost optimization is prioritized. |
| SMCJ48AHE3/52 | Same VWM/VC, but SMC (DO-214AB) package - larger footprint, 1500 W PPPM, higher IPPM (12.3 A). | Higher surge capacity suits applications with repeated heavy transients (e.g., factory automation PLC I/O). | Choose when 600 W is insufficient and PCB space allows larger SMC package. |
Compared with SMBJ48A-E3/52, the SMBJ48HE3/52 adds AEC-Q101 validation for automotive use without altering electrical performance; versus SMCJ48AHE3/52, it trades surge headroom for compact SMB footprint - ideal for space-constrained 48 V control boards needing certified reliability.
Availability
SMBJ48HE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply with automotive-grade traceability and long-term lifecycle support.
Supply support for SMBJ48HE3/52 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 reliability, precision, and application-specific qualification.
The SMBJ series targets board-level transient suppression in harsh environments - engineered for automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ48HE3/52 and how does it protect downstream components?
The SMBJ48HE3/52 has a maximum clamping voltage (VC) of 77.4 V at 7.8 A peak pulse current. This means that during a transient event, the device limits the voltage seen by downstream circuitry to no more than 77.4 V - well below the 100 V+ breakdown thresholds of most 48 V-rated MOSFETs and gate drivers. Its fast response time (<1 ns) ensures suppression occurs before sensitive components experience overstress, making SMBJ48HE3/52 effective for safeguarding power management ICs and microcontrollers in real-world surge scenarios.
Is SMBJ48HE3/52 suitable for automotive applications?
Yes, SMBJ48HE3/52 is AEC-Q101 qualified, meaning it has passed rigorous stress tests for temperature cycling, humidity, mechanical shock, and lifetime reliability required for automotive electronics. The HE3 suffix explicitly denotes this qualification, and the device is rated for operation from –55 °C to +150 °C junction temperature - matching under-hood and cabin module requirements. Engineers deploying SMBJ48HE3/52 in body control units or ADAS power supplies can rely on its validated automotive-grade performance.
How does the SMBJ48HE3/52 differ from the SMBJ48A-E3/52?
The SMBJ48HE3/52 and SMBJ48A-E3/52 share identical electrical specifications - same VWM (48 V), VBR, VC, PPPM, and package - but differ in qualification: SMBJ48HE3/52 is AEC-Q101 qualified and intended for automotive use, whereas SMBJ48A-E3/52 is commercial-grade. Both use RoHS-compliant matte tin plating and SMB (DO-214AA) packaging, but only SMBJ48HE3/52 carries the automotive reliability documentation and traceability required for Tier 1 automotive BOMs.
What is the thermal resistance and recommended PCB layout for SMBJ48HE3/52?
The SMBJ48HE3/52 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 achieve full 600 W pulse rating, the PCB must provide at least this pad area for each terminal - no thermal vias or extra copper are required for single-pulse events. For repetitive surges, additional copper pour or thermal relief design may be needed. The device's MSL Level 1 rating permits standard reflow without pre-baking.
Can SMBJ48HE3/52 be used in bidirectional configurations?
No, SMBJ48HE3/52 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., SMBJ48CA). Using SMBJ48HE3/52 in a bidirectional application would result in forward conduction during negative transients, potentially damaging the device or failing to suppress. For AC-coupled or dual-polarity signal lines, select SMBJ48CAHE3/52 instead - which provides symmetric clamping in both directions with same VWM and VC ratings.
SMBJ48HE3/52 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:
- 85.5V
- Current - Peak Pulse (10/1000µs):
- 7A
- 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)
SMBJ48HE3/52 FAQ
1.How can I place an order for SMBJ48HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48HE3/52 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 SMBJ48HE3/52 reliable?
The price and inventory of SMBJ48HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ48HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48HE3/52?
SMBJ48HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48HE3/52 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 SMBJ48HE3/52?
For technical support, including SMBJ48HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48HE3/52 requirements.
6.How does Aetrix verify that SMBJ48HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ48HE3/52 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 SMBJ48HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ48HE3/52?
All SMBJ48HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48HE3/52, 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 SMBJ48HE3/52 part is unused and in its original packaging.
Return procedure for SMBJ48HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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