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Vishay General Semiconductor - Diodes Division SMBJ48AHM3_A/H
- Part No.:
- SMBJ48AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48AHM3_A/H.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,985
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Product details
Overview
SMBJ48AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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 on power rails and signal lines of industrial sensor interfaces and automotive control modules.
For engineers reviewing the SMBJ48AHM3_A/H datasheet, SMBJ48AHM3_A/H pinout, SMBJ48AHM3_A/H application, or SMBJ48AHM3_A/H equivalent, this page delivers verified electrical parameters, thermal derating behavior, AEC-Q101 qualification status, halogen-free RoHS compliance, and real-world protection use cases for robust ESD/surge design validation.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 48 V), then rapidly avalanches below 58.9 V to clamp transient energy into ground. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance, enabling sub-nanosecond response to fast-rising transients.
Thermally, it exhibits RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), supporting reliable operation up to TJ = +150 °C. The device is qualified to AEC-Q101 and rated for repetitive 0.01% duty cycle pulses - critical for automotive body electronics and industrial PLC I/O protection where transient repetition must be sustained without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin for 48 V nominal systems. |
| VBR (min/max) | 53.3 V / 58.9 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs like microcontrollers or CAN transceivers. |
| PPPM | 600 W - Peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges when properly laid out. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports protection against accidental DC overvoltage events. |
| TJ max. | +150 °C - Maximum junction temperature; allows deployment in under-hood automotive environments and sealed industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow soldering per J-STD-020 MSL level 1. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; polarity indicated by cathode band on one end. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to protected line (e.g., 48 V supply rail or sensor output); conducts during avalanche to divert surge to ground. |
| Cathode | Reference node / clamping reference | Connected to system ground or low-impedance return; establishes clamping threshold relative to GND; marked by band on package. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 surge events without external heat sinking in compact layouts. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for body control modules and ADAS sensors. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global OEMs and industrial equipment sold in EU, China, and Japan markets. |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, reducing risk of latch-up or damage to downstream 3.3 V/5 V logic interfaces. |
| MSL level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without moisture-induced popcorn failure or delamination. |
Applications
| Automotive Body Control Module Protection | Industrial 48 V Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting LIN bus and switched 48 V loads (e.g., seat motors, HVAC actuators) from load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp transients above 48 V. Use Value: Limits clamped voltage to ≤77.4 V, preventing damage to 60 V-rated MOSFET drivers and microcontroller I/O pins. |
Use Scenario: Safeguarding analog outputs (4–20 mA, 0–10 V) and digital I/O of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Standoff-connected TVS on sensor output line, referenced to system ground, activated only during surge events. Use Value: Maintains signal integrity during 1 kV EFT bursts by clamping within 1 ns and dissipating 600 W without degradation. |
| Telecom Power Supply Input Protection | Renewable Energy Charge Controller Interface |
|
Use Scenario: Secondary-side overvoltage suppression on 48 V telecom rectifier outputs feeding base station radios and remote radio units. IC Role / Device Role / Timing Role: Primary transient suppressor on DC input rail upstream of DC/DC converters and PMICs. Use Value: Withstands repeated 600 W surges at 0.01% duty cycle, ensuring long-term reliability in outdoor cabinet deployments. |
Use Scenario: Protecting RS-485 communication lines and battery sense inputs in solar charge controllers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; unidirectional SMBJ48AHM3_A/H applied on positive rail with grounded cathode. Use Value: Clamps induced common-mode transients to <77.4 V while maintaining <1 µA leakage at 48 V - preserving measurement accuracy. |
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/H | Same electrical specs, but RoHS-compliant commercial grade (non-AEC-Q101); no halogen-free certification. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and halogen-free compliance is optional. |
| SMAJ48AHE3_A/H | Lower 400 W PPPM; same VWM/VC but higher clamping at rated current due to smaller SMA package (RθJA = 140 °C/W). | Not recommended for repetitive surge environments or high-ambient-temperature locations (>85 °C). | Choose only for space-constrained, low-duty-cycle applications where 600 W headroom is unnecessary. |
Compared with SMBJ48AHE3_A/H, the SMBJ48AHM3_A/H adds halogen-free compliance and AEC-Q101 qualification - essential for Tier 1 automotive sourcing. Against SMAJ48AHE3_A/H, its 600 W rating and lower thermal resistance enable higher surge endurance and broader ambient operating range.
Availability
SMBJ48AHM3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial 48 V sensor interfaces, telecom power supplies, and renewable energy controller designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ48AHM3_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 performance.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMBJ48AHM3_A/H at its rated peak pulse current?
The SMBJ48AHM3_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 is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. Designers must ensure downstream components tolerate this clamped voltage under worst-case layout and thermal conditions. The SMBJ48AHM3_A/H maintains this specification across its qualified temperature range and lifetime.
Is SMBJ48AHM3_A/H qualified for automotive applications?
Yes, SMBJ48AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet 88392. It undergoes stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D. This makes SMBJ48AHM3_A/H suitable for under-hood and cabin applications such as body control modules, lighting drivers, and sensor interfaces where automotive-grade reliability is required.
How does the SMBJ48AHM3_A/H differ from the standard SMBJ48A-E3 variant?
The SMBJ48AHM3_A/H differs from SMBJ48A-E3 in three key ways: it carries the HM3 suffix indicating halogen-free and AEC-Q101 qualification, whereas E3 denotes RoHS-compliant commercial grade only. It also uses matte tin plating meeting JESD 201 Class 2 whisker resistance, and is shipped in 7" tape-and-reel (code H). These distinctions make SMBJ48AHM3_A/H appropriate for automotive Tier 1 supply chains and environmentally regulated industrial deployments where SMBJ48A-E3 would not meet compliance requirements.
What is the maximum operating temperature for SMBJ48AHM3_A/H?
The SMBJ48AHM3_A/H has a maximum junction temperature (TJ) of +150 °C and an operating storage temperature range of –55 °C to +150 °C. Its thermal resistance values - RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.) - allow reliable operation in high-ambient environments when mounted on recommended 5.0 mm × 5.0 mm copper pads. Derating curves in the datasheet confirm usable power dissipation down to 50% at 100 °C ambient, ensuring robustness in enclosed industrial enclosures or automotive engine compartments.
Can SMBJ48AHM3_A/H be used in bidirectional protection circuits?
No, SMBJ48AHM3_A/H is a unidirectional TVS diode, identified by its cathode band marking and specified electrical characteristics for single-polarity operation. For bidirectional protection, Vishay offers the SMBJ48CA variant (with CA suffix), which provides symmetrical clamping in both directions. Using SMBJ48AHM3_A/H in a bidirectional configuration would result in forward conduction during negative transients, potentially damaging the device or failing to suppress the surge. Always match the device polarity to the circuit's expected transient direction.
SMBJ48AHM3_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:
- 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/H FAQ
1.How can I place an order for SMBJ48AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48AHM3_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 SMBJ48AHM3_A/H reliable?
The price and inventory of SMBJ48AHM3_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 SMBJ48AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ48AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48AHM3_A/H?
SMBJ48AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48AHM3_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 SMBJ48AHM3_A/H?
For technical support, including SMBJ48AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ48AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ48AHM3_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 SMBJ48AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ48AHM3_A/H?
All SMBJ48AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48AHM3_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 SMBJ48AHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ48AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48AHM3_A/H Tags
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