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Vishay General Semiconductor - Diodes Division SMBJ48AHE3/5B
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- Part No.:
- SMBJ48AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48AHE3/5B.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,942
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Product details
Overview
SMBJ48AHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. 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.
For engineers reviewing the SMBJ48AHE3/5B datasheet, SMBJ48AHE3/5B pinout, SMBJ48AHE3/5B application, or SMBJ48AHE3/5B equivalent, key selection criteria include clamping performance under 7.8 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification for automotive use, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 48 V, it avalanches into low-impedance conduction to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
It delivers 600 W peak pulse power per 10/1000 µs waveform with 0.01% duty cycle, exhibits fast response time (<1.0 ns), and maintains thermal stability up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 53.3 V / 58.9 V at IT = 1 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamping voltage during full-rated 600 W surge; determines protected IC's maximum transient exposure. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; validates robustness against common industrial/lightning surges. |
| IPPM | 7.8 A - Peak pulse current corresponding to VC; used to size PCB trace width and verify layout survivability. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| 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, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to ground or low-impedance return plane; carries full transient current during clamping. |
| Cathode | Reverse voltage sensing / Clamping control node | Connected to protected line (e.g., 48 V supply rail); avalanche initiates here when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) without derating in standard layouts. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain and body electronics where long-term reliability under thermal stress is mandatory. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 48 V microcontrollers and CAN transceivers. |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow without popcorn cracking or parameter shift; eliminates pre-baking requirements. |
| Glass passivated junction | Ensures stable VBR tolerance and <1.0 µA leakage at 48 V, critical for low-power sensor and battery-backed circuits. |
Applications
| Automotive Power Distribution | Industrial 48 V DC Bus Protection |
|---|---|
|
Use Scenario: Protecting 48 V supply rails in ADAS domain controllers and electric power steering modules from load dump and alternator transients. IC Role / Device Role: Unidirectional shunt clamp placed between 48 V rail and chassis ground. Use Value: Limits transient voltage to ≤77.4 V, preventing damage to 60 V-rated MOSFETs and PMICs while meeting ISO 7637-2 Pulse 5a requirements. |
Use Scenario: Safeguarding programmable logic controllers (PLCs) and motor drives connected to 48 V industrial power buses exposed to relay coil flyback and arc welding noise. IC Role / Device Role: Primary overvoltage clamp on input terminals of 48 V DC-DC converters and I/O modules. Use Value: Absorbs 600 W surges without degradation, maintaining system uptime in factory automation environments with frequent inductive switching. |
| Telecom Remote Radio Units | Server Rack Power Management |
|
Use Scenario: Shielding RF front-end components and bias supplies in 5G massive MIMO remote radio units powered via 48 V PoE++ or centralized plant power. IC Role / Device Role: Secondary-level TVS on 48 V bias lines feeding GaN amplifiers and ADC clock supplies. Use Value: Sub-1 ns response prevents ESD-induced latch-up in sensitive analog sections; AEC-Q101 grade ensures field longevity in outdoor cabinets. |
Use Scenario: Protecting hot-swap controllers and digital power monitors on 48 V intermediate bus architecture (IBA) server racks subject to insertion transients and backplane coupling. IC Role / Device Role: Point-of-load (POL) clamping device adjacent to 48 V input connectors and fuse blocks. Use Value: Withstands repeated 7.8 A surges without parameter drift, supporting N+1 redundant power design and minimizing field return rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48AHM3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy. | Choose SMBJ48AHM3/5B when material declarations require halogen-free status without sacrificing performance or qualification. |
| SMCJ48AHE3/5B | Same VWM/VC but in larger SMC (DO-214AB) package; rated for 1500 W PPPM and 32.4 A IPPM. | Used where higher surge margin is needed (e.g., outdoor telecom enclosures), but requires larger PCB footprint and different pad layout. | Choose SMCJ48AHE3/5B only if 600 W is insufficient and board space allows SMC footprint; otherwise SMBJ48AHE3/5B offers optimal density/performance balance. |
Compared with SMBJ48AHM3/5B, SMBJ48AHE3/5B provides identical protection performance with standard RoHS compliance; compared with SMCJ48AHE3/5B, it trades 2.5× lower surge rating for 40% smaller PCB area and compatibility with fine-pitch automated placement.
Availability
SMBJ48AHE3/5B is available at Aetrix Electronics and suitable for automotive power distribution, industrial 48 V DC bus protection, and telecom remote radio unit designs requiring stable component supply, AEC-Q101 validation, and high-volume SMT manufacturability.
Supply support for SMBJ48AHE3/5B 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-reliability transient suppression in automotive, industrial, and telecom systems where compact size, repeatable clamping, and qualification-grade consistency are non-negotiable.
FAQ
What is the clamping voltage of SMBJ48AHE3/5B at its rated peak pulse current?
The SMBJ48AHE3/5B 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 surge waveform. This value defines the upper voltage limit imposed on protected circuitry during a full 600 W transient event and is confirmed in the Vishay datasheet Document Number 88392, page 2.
Is SMBJ48AHE3/5B suitable for automotive applications?
Yes, SMBJ48AHE3/5B is AEC-Q101 qualified, as indicated by the "HE3" suffix, and is explicitly rated for automotive use in powertrain and body electronics. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev G, making it appropriate for 48 V systems in ADAS, EPS, and infotainment modules.
What does the "5B" in SMBJ48AHE3/5B signify?
The "5B" denotes the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This format supports high-speed pick-and-place assembly and is optimized for automated SMT lines requiring large-volume replenishment without manual handling interruptions.
How does SMBJ48AHE3/5B differ from bidirectional variants like SMBJ48CA?
SMBJ48AHE3/5B is unidirectional with cathode band marking and conducts only in reverse breakdown; SMBJ48CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. The unidirectional version offers lower leakage (<1.0 µA vs. ≤2.0 µA) and is preferred for DC rail protection, whereas bidirectional types suit AC-coupled or floating signal lines.
What is the thermal resistance of SMBJ48AHE3/5B from junction to ambient?
The typical thermal resistance from junction to ambient (RθJA) for SMBJ48AHE3/5B is 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB construction and is critical for calculating steady-state temperature rise under continuous power dissipation conditions.
SMBJ48AHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMBJ48AHE3/5B FAQ
1.How can I place an order for SMBJ48AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48AHE3/5B 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 SMBJ48AHE3/5B reliable?
The price and inventory of SMBJ48AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ48AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48AHE3/5B?
SMBJ48AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48AHE3/5B 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 SMBJ48AHE3/5B?
For technical support, including SMBJ48AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48AHE3/5B requirements.
6.How does Aetrix verify that SMBJ48AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ48AHE3/5B 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 SMBJ48AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ48AHE3/5B?
All SMBJ48AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48AHE3/5B, 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 SMBJ48AHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ48AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48AHE3/5B Tags
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