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Vishay General Semiconductor - Diodes Division SMBJ48AHM3_B/H
- Part No.:
- SMBJ48AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48AHM3_B/H.pdf
- Description:
- 600W,48V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,715
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Product details
Overview
SMBJ48AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the 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 a 10/1000 µs waveform - deployed in industrial motor drives, automotive body control modules, and telecom power supplies.
For engineers reviewing the SMBJ48AHM3_B/H datasheet, SMBJ48AHM3_B/H pinout, SMBJ48AHM3_B/H application, or SMBJ48AHM3_B/H equivalent, this part delivers AEC-Q101-qualified surge immunity, halogen-free RoHS compliance, and verified clamping performance under repetitive transients - critical when selecting TVS diodes for IEC 61000-4-5 Level 3-compliant 48 V systems.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below 48 V (VWM) and rapidly avalanches above ~53.3 V to limit transient energy. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while its 20 °C/W junction-to-lead thermal resistance supports reliable power dissipation during surge events.
The SMBJ48AHM3_B/H is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), operates from –55 °C to +150 °C, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak - confirming suitability for automated SMT assembly in high-reliability industrial and automotive PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 48 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin. |
| VBR (Breakdown Voltage) | 53.3–58.9 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 77.4 V at 7.8 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; enables downstream IC survival. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy absorption capability under standardized surge waveform; validates IEC 61000-4-5 compliance. |
| IPPM (Peak Pulse Current) | 7.8 A - Maximum transient current diverted to ground; determines required PCB trace width and grounding strategy. |
| TJmax | +150 °C - Maximum junction temperature; supports operation in engine bay or enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with JEDEC MS-012. |
Pinout & Package
Package: SMB (DO-214AA), 2-terminal surface-mount device with cathode band marking on one end. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to system ground or return path; completes clamping loop during transient events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 48 V rail); polarity-sensitive - reverse connection disables protection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including BCM, infotainment power rails, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and JEDEC J-STD-201 Class 2 whisker resistance - suitable for green manufacturing. |
| 600 W peak pulse power (10/1000 µs) | Withstands repeated lightning-induced surges per IEC 61000-4-5 without degradation. |
| Fast response time (<1 ps) | Clamps transients before sensitive downstream components (e.g., MCU I/O, CAN transceivers) experience overstress. |
| Low incremental surge resistance | Minimizes VC overshoot during high-di/dt events - critical for protecting 48 V automotive subsystems. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 48 V DC bus against inductive kickback from brushed DC motors and relay coils. IC Role / Device Role / Timing Role: Shunt clamping element placed directly across motor driver supply input. Use Value: Limits transient spikes to ≤77.4 V, preventing damage to gate drivers and microcontrollers rated for 60 V absolute max. |
Use Scenario: Surge suppression on LIN bus power lines and window lift actuator control circuits. IC Role / Device Role / Timing Role: Unidirectional TVS connected between VBAT and GND near connector entry points. Use Value: Absorbs load-dump and jump-start transients per ISO 7637-2 Pulse 5a, maintaining system uptime. |
| Telecom Power Supplies | Smart Building Sensors |
|
Use Scenario: Input-stage protection for 48 V PoE-powered base stations and remote radio units. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC output before DC-DC converters. Use Value: Clamps induced surges from nearby lightning strikes to <77.4 V, preserving isolation barrier integrity. |
Use Scenario: ESD and surge hardening of 48 V-powered HVAC controllers and occupancy sensors. IC Role / Device Role / Timing Role: Point-of-entry TVS on field wiring terminals exposed to building mains coupling. Use Value: Withstands 600 W pulses without parametric shift - ensuring long-term reliability in unattended deployments. |
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_B/H | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Acceptable where halogen-free material is not mandated by OEM or regional regulation. | Select SMBJ48AHE3_B/H for cost-sensitive commercial designs without halogen restrictions. |
| SMBJ48CAHM3_B/H | Bidirectional variant; symmetric VBR (53.3–58.9 V) in both directions; no polarity marking. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN FD differential pairs). | Choose SMBJ48CAHM3_B/H only when bidirectional clamping is explicitly needed - unidirectional SMBJ48AHM3_B/H offers lower leakage and simpler layout. |
Compared with SMBJ48AHE3_B/H, the SMBJ48AHM3_B/H adds halogen-free compliance without sacrificing surge rating or thermal performance; versus SMBJ48CAHM3_B/H, it provides superior reverse leakage control and simplified polarity-aware placement in DC power rail protection.
Availability
SMBJ48AHM3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, long-lifecycle support, and AEC-Q101-qualified surge protection.
Supply support for SMBJ48AHM3_B/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of SMBJ48AHM3_B/H at its rated peak pulse current?
The SMBJ48AHM3_B/H has a maximum clamping voltage (VC) of 77.4 V at 7.8 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - a key parameter for verifying compatibility with downstream 60 V-rated ICs in 48 V systems.
Is SMBJ48AHM3_B/H suitable for automotive applications?
Yes, SMBJ48AHM3_B/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix). It is specifically validated for use in automotive body control modules, lighting drivers, and 48 V mild-hybrid subsystems - meeting requirements for temperature cycling, humidity resistance, and surge endurance per automotive reliability standards.
How does the SMBJ48AHM3_B/H differ from the SMBJ48AHE3_B/H variant?
The SMBJ48AHM3_B/H uses halogen-free molding compound and matte tin plating compliant with JEDEC J-STD-201 Class 2, whereas SMBJ48AHE3_B/H is RoHS-compliant but contains halogens. Both share identical electrical specifications, AEC-Q101 qualification, and SMB (DO-214AA) packaging - making SMBJ48AHM3_B/H the preferred choice where halogen-free compliance is mandated by OEM or regulatory policy.
What is the maximum operating temperature for SMBJ48AHM3_B/H?
The SMBJ48AHM3_B/H has a maximum junction temperature (TJmax) of +150 °C and an operating junction/storage temperature range of –55 °C to +150 °C. This rating enables deployment in under-hood automotive locations, industrial enclosures with limited airflow, and telecom base stations operating in hot ambient conditions - provided thermal design accounts for its 100 °C/W junction-to-ambient resistance.
Does SMBJ48AHM3_B/H require polarity-aware PCB layout?
Yes, SMBJ48AHM3_B/H is a unidirectional TVS diode with a marked cathode band. Correct orientation - cathode toward the protected line (e.g., 48 V rail), anode toward ground - is mandatory for proper clamping function. Reversing polarity renders the device ineffective for overvoltage protection and may cause catastrophic failure during surge events.
SMBJ48AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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_B/H FAQ
1.How can I place an order for SMBJ48AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48AHM3_B/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 SMBJ48AHM3_B/H reliable?
The price and inventory of SMBJ48AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ48AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48AHM3_B/H?
SMBJ48AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48AHM3_B/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 SMBJ48AHM3_B/H?
For technical support, including SMBJ48AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ48AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ48AHM3_B/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 SMBJ48AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ48AHM3_B/H?
All SMBJ48AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48AHM3_B/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 SMBJ48AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ48AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48AHM3_B/H Tags
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