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Vishay General Semiconductor - Diodes Division SMCJ48AHM3_A/H
- Part No.:
- SMCJ48AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48AHM3_A/H.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCJ48AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) 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 19.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ48AHM3_A/H datasheet, SMCJ48AHM3_A/H pinout, SMCJ48AHM3_A/H application, or SMCJ48AHM3_A/H equivalent, key selection criteria include clamping performance under 19.4 A surge, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification status, halogen-free RoHS compliance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable breakdown and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs double-exponential surge waveform, with derating above TA = 25 °C per Figure 2 and thermal impedance characterized to 150 °C maximum junction temperature.
The SMCJ48AHM3_A/H exhibits a +0.103 %/°C temperature coefficient of VBR and 1.0 µA maximum reverse leakage at VWM - enabling predictable overvoltage response across automotive (-40 °C to +125 °C ambient) and industrial operating ranges. Polarity is marked by a cathode band; no marking applies to bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 53.3 V / 58.9 V at IT = 1 mA - ensures reliable avalanche conduction onset within tight tolerance |
| VC @ IPPM | 77.4 V at 19.4 A - limits transient voltage seen by protected ICs during 10/1000 µs surge |
| PPPM | 1500 W - sustains high-energy transients such as ISO 7637-2 Pulse 1/2a/5a without failure |
| RθJA | 75 °C/W - requires thermal pad design per recommended 8.0 mm × 8.0 mm copper area for safe 6.5 W dissipation |
| TJ max | +150 °C - supports operation in under-hood automotive environments and enclosed industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline compatible with JEDEC MS-013AC |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection | Connected to ground or return path; conducts during forward-biased surge events (unidirectional only) |
| Cathode | High-side connection | Connected to protected line (e.g., 48 V rail); avalanche conduction occurs when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power systems requiring reliability beyond commercial-grade TVS diodes |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for Tier 1 automotive suppliers and EU industrial equipment |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 24 V) versus higher-resistance alternatives, reducing stress on downstream MOSFETs |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak, eliminating bake requirements prior to assembly |
| Glass passivated junction | Provides stable VBR over lifetime and improved humidity resistance vs. epoxy-passivated competitors |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48 V rail and chassis ground to clamp surges before they reach DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤77.4 V during 19.4 A pulses, preventing latch-up or gate oxide damage in 40 V-rated input stages. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to absorb ESD (IEC 61000-4-2) and inductive switching spikes from nearby solenoids. Use Value: Clamps 8 kV contact ESD events within <1 ns, preserving ±0.1% measurement accuracy and avoiding ADC saturation. |
| Telecom DC Power Feeds | Motor Drive Control Board Inputs |
Use Scenario: Shielding PoE-powered remote radio units from lightning-induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC-DC isolation, rated for repeated 1500 W transients. Use Value: Withstands multiple 10/1000 µs surges up to 19.4 A without parametric shift, ensuring field-replaceable unit longevity. | Use Scenario: Guarding microcontroller GPIOs and gate drivers from cross-talk and flyback spikes in BLDC motor control boards. IC Role / Device Role / Timing Role: Localized TVS on each I/O trace near connector entry points to suppress fast-rising (<1 ns) edge transients. Use Value: 75 °C/W RθJA enables direct PCB copper pour heatsinking, maintaining clamping performance at 85 °C ambient. |
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 | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR/VC specs | Suitable for space-constrained consumer electronics but not for automotive load dump where 1500 W is required | Select SMCJ48AHM3_A/H when system-level surge testing demands ≥1500 W capability and thermal margin |
| SMCJ48AHE3_A/H | Same package and electrical specs, but RoHS-compliant without halogen-free certification | Acceptable for non-automotive industrial use where halogen-free materials are not mandated | Choose SMCJ48AHM3_A/H when compliance with automotive material standards (e.g., GMW3172) is required |
Compared with SMBJ48AHE3_A/H and SMCJ48AHE3_A/H, the SMCJ48AHM3_A/H delivers full 1500 W surge handling in an AEC-Q101-qualified, halogen-free construction - making it the only option among the three validated for under-hood automotive deployment with zero material or reliability compromises.
Availability
SMCJ48AHM3_A/H is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial sensor interfaces, telecom DC feeds, and motor drive control board designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ48AHM3_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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMCJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom infrastructure where sustained surge immunity and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMCJ48AHM3_A/H at its rated peak pulse current?
The SMCJ48AHM3_A/H has a maximum clamping voltage (VC) of 77.4 V at its rated peak pulse current (IPPM) of 19.4 A, measured using a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during standardized surge events and is critical for ensuring downstream components remain within their absolute maximum ratings. The SMCJ48AHM3_A/H achieves this clamping performance while maintaining a low incremental surge resistance characteristic of Vishay's glass-passivated TransZORB® technology.
Is SMCJ48AHM3_A/H qualified for automotive applications?
Yes, the SMCJ48AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in the SMCJ5.0A–SMCJ188CA datasheet (Document Number: 88394, Revision: 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT), validating its suitability for under-hood and powertrain-related automotive electronics. The SMCJ48AHM3_A/H meets these requirements while also being halogen-free and RoHS-compliant.
What does the "HM3" suffix signify in SMCJ48AHM3_A/H?
The "HM3" suffix in SMCJ48AHM3_A/H indicates halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. Per Vishay's ordering information table, "Base P/NHM3_X" denotes devices that are both environmentally compliant (halogen-free per IEC 61249-2-21) and automotive-qualified, with "_X" representing the revision code (here, "A/H"). This distinguishes SMCJ48AHM3_A/H from commercial-grade "M3" or "E3" variants and confirms its eligibility for Tier 1 automotive supply chains requiring full material and reliability certification.
What is the thermal resistance junction-to-ambient for SMCJ48AHM3_A/H?
The typical thermal resistance junction-to-ambient (RθJA) for SMCJ48AHM3_A/H is 75 °C/W, measured under standard conditions with minimum recommended pad layout (0.31" × 0.31" copper pads per terminal). This value assumes no additional heatsinking and guides PCB layout decisions - for example, achieving safe 6.5 W power dissipation at TA = 50 °C requires careful copper area allocation. The SMCJ48AHM3_A/H also has a lower RθJL of 15 °C/W, supporting thermal transfer through leads when mounted on thermally enhanced land patterns.
How does SMCJ48AHM3_A/H differ from bidirectional SMCJ48CA variants?
The SMCJ48AHM3_A/H is unidirectional, featuring a cathode band marking and conducting only in reverse avalanche mode - ideal for DC rail protection where polarity is fixed. In contrast, SMCJ48CA is bidirectional, with symmetrical clamping in both directions and no polarity marking, suited for AC signal lines or differential buses. Their VWM (48 V), VBR (53.3–58.9 V), and VC (77.4 V) match, but SMCJ48AHM3_A/H supports forward surge current (IFSM = 200 A), while SMCJ48CA does not specify IFSM due to its symmetric structure. Selection depends strictly on circuit polarity requirements.
SMCJ48AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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):
- 19.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SMCJ48AHM3_A/H FAQ
1.How can I place an order for SMCJ48AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48AHM3_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 SMCJ48AHM3_A/H reliable?
The price and inventory of SMCJ48AHM3_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 SMCJ48AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ48AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48AHM3_A/H?
SMCJ48AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48AHM3_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 SMCJ48AHM3_A/H?
For technical support, including SMCJ48AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48AHM3_A/H requirements.
6.How does Aetrix verify that SMCJ48AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ48AHM3_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 SMCJ48AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ48AHM3_A/H?
All SMCJ48AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48AHM3_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 SMCJ48AHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ48AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48AHM3_A/H Tags
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