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Vishay General Semiconductor - Diodes Division SMBJ48AHM3_A/I
- Part No.:
- SMBJ48AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48AHM3_A/I.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,086
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Product details
Overview
SMBJ48AHM3_A/I 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 sensitive electronics. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR) at 1 mA, 7.8 A peak pulse current (IPPM) under 10/1000 µs waveform, and clamps transients to ≤77.4 V - deployed on power rails and signal lines of industrial motor drives, automotive ECUs, and telecom interface circuits.
For engineers reviewing the SMBJ48AHM3_A/I datasheet, SMBJ48AHM3_A/I pinout, SMBJ48AHM3_A/I application, or SMBJ48AHM3_A/I equivalent, key selection criteria include its AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, 600 W peak pulse power rating, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on PCBs requiring high-reliability surge immunity per IEC 61000-4-5.
Technical Context
This TVS diode operates as a clamping device in unidirectional configuration, leveraging an avalanche breakdown mechanism to limit transient overvoltages before they damage downstream ICs or MOSFETs. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at VWM), while the SMB package supports high surge current handling without thermal runaway under repetitive 0.01% duty cycle pulses.
The SMBJ48AHM3_A/I is rated for continuous operation from –55 °C to +150 °C junction temperature, with MSL Level 1 moisture sensitivity and 260 °C lead-free reflow compatibility. Its 100 °C/W junction-to-ambient thermal resistance (RθJA) assumes minimum recommended copper pad layout (0.2" × 0.2"), making thermal design validation essential for sustained 5.0 W power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC/AC rail protection threshold. |
| VBR (min/max) | 53.3 V / 58.9 V at IT = 1 mA - guaranteed avalanche onset range; ensures predictable clamping initiation across temperature and lot variation. |
| VC @ IPPM | ≤77.4 V at 7.8 A (10/1000 µs) - clamped voltage during worst-case surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 600 W - peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 (4 kV) surges with margin. |
| IFSM | 100 A - non-repetitive forward surge current rating (8.3 ms half-sine); supports inrush or fault-current events in power supply inputs. |
| TJ max. | +150 °C - maximum junction temperature; allows operation in under-hood automotive or enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with JEDEC MS-012. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, polarity indicated by cathode band on one end. Complies with UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance reference plane; completes clamping loop during positive transients. |
| Cathode | Protected line connection / surge input | Connected to line being protected (e.g., 48 V supply rail); avalanche conduction occurs when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units and body electronics; supports PPAP documentation and zero-defect reliability targets. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declarations; eliminates brominated flame retardants for safer end-of-life processing. |
| 600 W peak pulse power (10/1000 µs) | Provides margin above IEC 61000-4-5 Level 4 (4 kV) test requirements; sustains multiple surge events without degradation. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response); critical for protecting high-speed logic and analog front-ends. |
| MSL Level 1, 260 °C reflow capable | Enables single-pass lead-free assembly without baking or special handling; reduces manufacturing cost and process complexity. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 48 V auxiliary power rails feeding gate drivers and position sensors in servo inverters. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed at DC bus input to absorb switching-induced voltage spikes from IGBT/MOSFET turn-off. Use Value: Limits transient excursions to ≤77.4 V, preventing latch-up or oxide breakdown in 65 V-rated gate drivers and isolated ADCs. |
Use Scenario: Surge suppression on LIN bus lines and 12 V/48 V domain interconnects in BCMs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between signal line and chassis ground, activated within <1 ns of overvoltage event. Use Value: Maintains signal integrity below 77.4 V clamping level during 100 V/50 ms load dump transients, ensuring CAN/LIN transceiver survival. |
| Telecom Power Interfaces | Renewable Energy Inverters |
|
Use Scenario: Input-stage protection of PoE-powered equipment and base station RF front-end supplies subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input, coordinated with upstream MOVs and downstream π-filters for multi-stage immunity. Use Value: Withstands 600 W peak pulses while maintaining <1.0 µA leakage at 48 V, minimizing standby power loss in always-on telecom gear. |
Use Scenario: DC-link protection in solar microinverters where PV string voltages reach up to 60 V, facing rapid transients from arc faults or grid switching. IC Role / Device Role / Timing Role: Clamping element across DC bus capacitors to clamp voltage overshoot during fault clearing cycles. Use Value: Enables reliable operation up to +150 °C ambient with RθJL = 20 °C/W, reducing thermal derating needs in compact sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48AHE3_A/I | Same electrical specs but RoHS-compliant (E3), not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial/industrial use only; not approved for automotive production. | Select when halogen-free content or automotive qualification is not required; lower cost alternative for non-automotive BOMs. |
| SMAJ48A-M3 | Lower 400 W PPPM, SMA package (smaller footprint, higher RθJA = 140 °C/W), same VWM/VC. | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump. | Choose only for space-constrained designs with verified <400 W surge exposure; requires thermal redesign due to inferior heat dissipation. |
Compared with SMBJ48AHM3_A/I, SMBJ48AHE3_A/I offers identical clamping performance but omits halogen-free and AEC-Q101 compliance, while SMAJ48A-M3 sacrifices 33% peak power rating and thermal robustness for smaller size - making SMBJ48AHM3_A/I the optimal choice for high-reliability 48 V systems demanding automotive-grade assurance and full IEC surge margin.
Availability
SMBJ48AHM3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power interfaces requiring stable component supply, long-term lifecycle support, and traceable halogen-free sourcing.
Supply support for SMBJ48AHM3_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, efficiency, and application-specific optimization.
The SMBJ series delivers high-power transient suppression in compact surface-mount packages, engineered for automotive, industrial, and telecom systems where robustness against ESD, EFT, and surge events is mission-critical.
FAQ
What is the clamping voltage of SMBJ48AHM3_A/I under a 10/1000 µs surge?
The SMBJ48AHM3_A/I clamps to a maximum of 77.4 V when subjected to its rated 7.8 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is guaranteed across temperature and production lots, and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream 80 V-rated components remain within safe operating area.
Is SMBJ48AHM3_A/I suitable for automotive applications?
Yes, SMBJ48AHM3_A/I is AEC-Q101 qualified (denoted by the HM3 suffix) and specifically designed for automotive use, including engine control units, body electronics, and ADAS power domains. Its halogen-free construction, MSL Level 1 rating, and validated performance from –55 °C to +150 °C junction temperature meet stringent OEM requirements for under-hood and chassis-mounted systems.
How does the HM3 suffix differ from E3 or HE3 in Vishay's SMBJ naming convention?
The HM3 suffix on SMBJ48AHM3_A/I indicates halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. In contrast, E3 denotes RoHS-compliant only (no halogen-free or automotive qualification), and HE3 adds AEC-Q101 but not halogen-free content. Thus, SMBJ48AHM3_A/I uniquely satisfies all three requirements: automotive qualification, environmental compliance, and halogen-free materials.
What is the thermal resistance from junction to lead (RθJL) for SMBJ48AHM3_A/I?
The SMBJ48AHM3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, measured under standard test conditions. This low value enables efficient heat transfer from the silicon die to the PCB copper pads via the leads, supporting reliable 5.0 W continuous power dissipation when mounted on recommended 0.2" × 0.2" copper areas - essential for high-duty-cycle surge environments.
Can SMBJ48AHM3_A/I be used in bidirectional configurations?
No, SMBJ48AHM3_A/I is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the "CA" suffix (e.g., SMBJ48CA). Using SMBJ48AHM3_A/I in reverse-biased AC applications would result in forward conduction and potential failure; correct polarity orientation must be maintained in PCB layout.
SMBJ48AHM3_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:
- 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)
SMBJ48AHM3_A/I FAQ
1.How can I place an order for SMBJ48AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48AHM3_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 SMBJ48AHM3_A/I reliable?
The price and inventory of SMBJ48AHM3_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 SMBJ48AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ48AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48AHM3_A/I?
SMBJ48AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48AHM3_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 SMBJ48AHM3_A/I?
For technical support, including SMBJ48AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48AHM3_A/I requirements.
6.How does Aetrix verify that SMBJ48AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ48AHM3_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 SMBJ48AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ48AHM3_A/I?
All SMBJ48AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48AHM3_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 SMBJ48AHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ48AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48AHM3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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