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Vishay General Semiconductor - Diodes Division SMBJ48AHE3_A/H
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- Part No.:
- SMBJ48AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48AHE3_A/H.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,646
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Product details
Overview
SMBJ48AHE3_A/H 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 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 - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ48AHE3_A/H datasheet, SMBJ48AHE3_A/H pinout, SMBJ48AHE3_A/H application, or SMBJ48AHE3_A/H 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 voltage-clamping protection device in parallel with sensitive circuit nodes. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle. The device is rated for 100 A non-repetitive forward surge current (IFSM) and exhibits 0.103 %/°C temperature coefficient of VBR.
Designed for automated SMT assembly, SMBJ48AHE3_A/H meets J-STD-002 and JESD 22-B102 solderability standards, MSL Level 1 per J-STD-020, and UL 94 V-0 flammability rating. The matte tin-plated leads and cathode band marking confirm unidirectional polarity and RoHS-compliant, AEC-Q101-qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 53.3 V / 58.9 V at IT = 1 mA - Ensures reliable triggering across process variation and temperature; guarantees clamping onset within spec. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamped voltage seen by protected circuit during 600 W transient; limits stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; supports robust protection against lightning-induced surges and inductive switching spikes. |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); validates survivability against high-energy power-line faults. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in high-ambient environments such as automotive engine bays or industrial enclosures. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs heatsinking requirements for sustained power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking on unidirectional variants. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), compliant with IPC-7351B footprint recommendations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., ground or return path); enables clamping when cathode exceeds VWM relative to anode. |
| Cathode | Current exit terminal; marked with band | Connected to protected line (e.g., 48 V rail); conducts during overvoltage to shunt surge current to ground via anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for under-hood and ADAS power rail protection. |
| 600 W peak pulse power | Withstands high-energy transients per ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 without degradation. |
| Glass passivated junction | Ensures stable leakage performance (ID ≤ 1.0 µA at VWM) and long-term reliability under humid or contaminated environments. |
| MSL Level 1 | Allows unlimited floor life and reflow compatibility up to 260 °C peak - eliminates baking requirements prior to assembly. |
| UL 497B recognized | Qualified as a listed surge protector (QVGQ2, E136766) for telecom and industrial equipment safety certification. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protecting 48 V DC input rails in programmable logic controllers (PLCs) and motor drives against load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input terminals to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: Limits clamped voltage to 77.4 V, preventing damage to 60 V-rated input stages while maintaining system uptime during factory electrical noise events. |
Use Scenario: Safeguarding LIN bus transceivers and power management ICs in BCMs exposed to battery voltage fluctuations and alternator load dump. IC Role / Device Role / Timing Role: Parallel-connected TVS on 12 V/48 V auxiliary rails to absorb ISO 16750-2 pulses without affecting communication timing integrity. Use Value: AEC-Q101 qualification and −55 to +150 °C operation ensure functional safety compliance and zero field failures in harsh vehicle environments. |
| Telecom Remote Radio Unit (RRU) | Consumer Smart Home Gateway |
|
Use Scenario: Shielding Ethernet PHY power pins and RS-485 data lines in outdoor base station RRUs from lightning-induced surges on PoE or external cabling. IC Role / Device Role / Timing Role: Standoff-rated TVS on 48 V PoE injectors and isolated signal paths to prevent latch-up in high-speed interface ICs. Use Value: 77.4 V clamping voltage preserves margin below 100 V absolute maximum ratings of PHYs and isolators, enabling single-stage protection architecture. |
Use Scenario: Securing USB-C PD input and Zigbee/Z-Wave RF module supply lines in smart home hubs subjected to ESD and AC line coupling. IC Role / Device Role / Timing Role: Low-capacitance TVS on 5–48 V input rails to suppress fast transients without distorting high-frequency signaling. Use Value: Sub-1 nS response and 1.0 µA leakage at 48 V minimize standby power loss and preserve signal integrity on always-on wireless interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48AHM3_A/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No difference in protection performance or thermal behavior; selected where halogen-free material compliance is mandated. | Choose SMBJ48AHM3_A/H when environmental compliance requires halogen-free packaging without sacrificing reliability. |
| SMBJ48A-E3/52 | Commercial-grade (non-AEC-Q101), same SMB package and electrical parameters; RoHS-compliant but not automotive-qualified. | Not validated for automotive temperature cycling or lifetime reliability testing; limited to industrial/commercial end-equipment. | Select SMBJ48A-E3/52 for cost-sensitive, non-automotive designs where AEC-Q101 is not required. |
Compared with SMBJ48AHE3_A/H, SMBJ48AHM3_A/H offers identical protection performance with halogen-free construction, while SMBJ48A-E3/52 provides equivalent clamping and power rating without automotive qualification - enabling trade-offs between environmental compliance, reliability validation, and BOM cost.
Availability
SMBJ48AHE3_A/H is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom remote radio units, and consumer smart home gateways requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ48AHE3_A/H 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, efficiency, and application-specific optimization.
SMBJ48AHE3_A/H belongs to Vishay's TRANSZORB® family of transient voltage suppressors, engineered specifically for high-energy surge immunity in automotive, industrial, and telecom infrastructure applications where robustness and certification readiness are critical.
FAQ
What is the clamping voltage of SMBJ48AHE3_A/H at its rated peak pulse current?
The SMBJ48AHE3_A/H has a maximum clamping voltage (VC) of 77.4 V at 7.8 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuits during surge events and is measured under standardized test conditions per ANSI/IEEE C62.35. The SMBJ48AHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMBJ48AHE3_A/H qualified for automotive applications?
Yes, SMBJ48AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88392. This qualification covers stress tests including temperature cycling, high-temperature operating life, and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive systems such as body control modules and ADAS power domains.
What does the "HE3" suffix in SMBJ48AHE3_A/H indicate?
The "HE3" suffix in SMBJ48AHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering nomenclature, "HE3" identifies the commercial-grade, lead-free, automotive-qualified variant - distinct from "E3" (RoHS, non-automotive) and "HM3" (halogen-free + AEC-Q101). The "_A/H" denotes revision level and tape-and-reel packaging format (7" reel, 750 units).
How does SMBJ48AHE3_A/H differ from bidirectional TVS diodes like SMBJ48CA?
SMBJ48AHE3_A/H is unidirectional and features a cathode band marking; it conducts only when cathode voltage exceeds anode by >VBR, making it ideal for DC rail protection. In contrast, SMBJ48CA is bidirectional with symmetrical clamping in both polarities and no polarity marking - suited for AC lines or differential signal protection. Their VWM, VBR, and VC values differ accordingly, and they are not interchangeable without circuit redesign.
What is the thermal resistance and maximum junction temperature of SMBJ48AHE3_A/H?
SMBJ48AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads, and a maximum junction temperature (TJ) of +150 °C. These values define its power derating curve above 25 °C ambient and confirm operational capability in high-temperature environments such as engine compartments or enclosed industrial enclosures.
SMBJ48AHE3_A/H 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/H FAQ
1.How can I place an order for SMBJ48AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48AHE3_A/H 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/H reliable?
The price and inventory of SMBJ48AHE3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for SMBJ48AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48AHE3_A/H?
SMBJ48AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48AHE3_A/H 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/H?
For technical support, including SMBJ48AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48AHE3_A/H requirements.
6.How does Aetrix verify that SMBJ48AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ48AHE3_A/H 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/H meets industry standards.
7.What is the process for return or replacement of SMBJ48AHE3_A/H?
All SMBJ48AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48AHE3_A/H, 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/H part is unused and in its original packaging.
Return procedure for SMBJ48AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48AHE3_A/H Tags
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