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Vishay General Semiconductor - Diodes Division SMCJ48CAHM3_A/I
- Part No.:
- SMCJ48CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48CAHM3_A/I.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,507
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Product details
Overview
SMCJ48CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 77.4 V at 19.4 A peak pulse current (10/1000 µs), with 1500 W peak pulse power rating and 48 V stand-off voltage. It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive, industrial, and telecom systems against inductive switching surges and lightning-induced transients.
For engineers reviewing the SMCJ48CAHM3_A/I datasheet, SMCJ48CAHM3_A/I pinout, SMCJ48CAHM3_A/I application, or SMCJ48CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, 1500 W surge rating, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities due to its bidirectional construction. Its breakdown voltage range is 53.3–58.9 V at 1 mA test current, and it maintains stable clamping performance across -55 °C to +150 °C junction temperature range.
Designed for transient suppression per IEC 61000-4-2/4-4/4-5, it exhibits low incremental surge resistance and fast response time (<1 ns), enabling effective protection of downstream components without affecting normal signal integrity during steady-state operation at ≤48 V reverse stand-off.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 53.3 V / 58.9 V at 1 mA - Ensures reliable avalanche initiation within defined tolerance band |
| VC @ IPPM | 77.4 V at 19.4 A - Clamped voltage during full 1500 W transient, limiting stress on protected circuitry |
| PPPM | 1500 W - Peak pulse power handling capability with 10/1000 µs waveform |
| Junction Temp | -55 °C to +150 °C - Enables use in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - Standardized surface-mount outline compatible with JEDEC MS-013AC footprint |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
SMCJ48CAHM3_A/I uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with two terminals, no polarity marking for bidirectional configuration, matte tin-plated leads solderable per J-STD-002, and MSL Level 1 rating (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; conducts during negative transients |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical avalanche junction; conducts during positive transients |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring long-term field reliability |
| Halogen-free & RoHS-compliant | Meets global environmental regulations and supports lead-free reflow assembly processes |
| Low profile SMC package | Reduces board space vs. larger DO-214AA/DO-214AC packages while maintaining thermal robustness |
| 1500 W surge rating | Provides margin against severe transients such as ISO 7637-2 Pulse 5a (load dump) in 12 V systems |
Applications
| Automotive Power Distribution | Industrial Sensor Interface |
|---|---|
Use Scenario: Protection of 12 V supply rails feeding ECUs, lighting modules, and infotainment systems against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamping device placed at input stage to limit voltage excursions to safe levels before LDOs or DC-DC converters. Use Value: Withstands 1500 W pulses and operates up to +150 °C, ensuring uninterrupted function during engine cranking and hot ambient conditions. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature, current sense) from ESD and cable discharge events in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor placed directly at connector interface to shunt fast transients before signal conditioning amplifiers. Use Value: 77.4 V clamping voltage prevents saturation of downstream op-amps and ADC front-ends while maintaining signal fidelity below 48 V nominal range. |
| Telecom Line Card Protection | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors from induced surges on twisted-pair cabling in outdoor base stations. IC Role / Device Role / Timing Role: Bidirectional TVS connected across differential pairs to clamp common-mode transients without disrupting DC bias or data integrity. Use Value: Symmetrical breakdown ensures equal clamping on both lines, preserving common-mode rejection ratio (CMRR) during surge events. | Use Scenario: Input-stage overvoltage protection for universal-input AC/DC adapters used in laptops and monitors subjected to mains overvoltage and lightning surges. IC Role / Device Role / Timing Role: Primary-side transient suppressor mounted between bridge rectifier output and bulk capacitor to absorb line-to-line and line-to-ground spikes. Use Value: 1500 W rating handles IEC 61000-4-5 Combination Wave (1.2/50 µs & 8/20 µs) surges without degradation over product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CAHM3_A/I | 600 W peak pulse power, SMB (DO-214AA) package, same VWM/VC specs but lower surge capacity | Suitable for lower-energy transients; limited to consumer-grade or non-automotive applications | Select when board space constraints favor smaller SMB footprint and surge requirements do not exceed 600 W |
| SMCJ48AHE3_A/I | Unidirectional version, identical package and clamping, but requires correct polarity orientation during layout | Applicable only where circuit ground reference is fixed and reverse conduction must be blocked | Choose only if system architecture mandates unidirectional blocking; otherwise SMCJ48CAHM3_A/I offers greater design flexibility |
Compared with SMBJ48CAHM3_A/I and SMCJ48AHE3_A/I, the SMCJ48CAHM3_A/I delivers higher surge immunity (1500 W vs. 600 W) and polarity-agnostic protection-critical for ruggedized automotive and industrial deployments where layout flexibility and worst-case transient margin are prioritized.
Availability
SMCJ48CAHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom infrastructure requiring stable component supply with AEC-Q101 qualification and halogen-free compliance.
Supply support for SMCJ48CAHM3_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 TVS devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments-including automotive, industrial, and communications systems-where consistent clamping performance and long-term stability are mandatory.
FAQ
What does the 'CA' suffix indicate in SMCJ48CAHM3_A/I?
The 'CA' suffix in SMCJ48CAHM3_A/I denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage clamping in both polarities. This eliminates the need for polarity-aware placement on PCBs and enables protection of AC-coupled or floating signal paths. Unlike unidirectional variants (e.g., SMCJ48A), SMCJ48CAHM3_A/I has no cathode marking and functions identically regardless of voltage polarity applied across its terminals.
Is SMCJ48CAHM3_A/I qualified for automotive applications?
Yes, SMCJ48CAHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix 'HM3' (halogen-free, RoHS-compliant, and AEC-Q101 qualified). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, making SMCJ48CAHM3_A/I suitable for under-hood and cabin-mounted automotive modules where reliability under thermal and electrical stress is critical.
What is the maximum clamping voltage of SMCJ48CAHM3_A/I and how is it measured?
The maximum clamping voltage (VC) of SMCJ48CAHM3_A/I is 77.4 V, measured at 19.4 A peak pulse current using a 10/1000 µs double-exponential waveform. This value represents the upper limit of voltage seen by downstream circuitry during a full-rated 1500 W transient event, and is guaranteed across the full operating temperature range (-55 °C to +150 °C) per Vishay's datasheet specifications.
How does the SMC (DO-214AB) package of SMCJ48CAHM3_A/I compare to SMB (DO-214AA)?
The SMC (DO-214AB) package used by SMCJ48CAHM3_A/I offers higher power dissipation and surge handling than SMB (DO-214AA), supporting 1500 W vs. 600 W peak pulse power. Its larger copper pad area (0.31" × 0.31") improves thermal transfer, and its standardized footprint allows direct integration into high-reliability industrial and automotive designs where robustness outweighs size constraints.
Does SMCJ48CAHM3_A/I require external heat sinking for standard operation?
No, SMCJ48CAHM3_A/I does not require external heat sinking for transient suppression duty cycles. Its thermal resistance (RθJA) is 75 °C/W with standard PCB pad layout (0.31" × 0.31" copper per terminal), and its 6.5 W steady-state power dissipation rating is sufficient for typical leakage-limited standby conditions. Heat sinking is only needed for sustained high-power DC stress scenarios outside its intended transient-clamping function.
SMCJ48CAHM3_A/I 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ48CAHM3_A/I FAQ
1.How can I place an order for SMCJ48CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48CAHM3_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 SMCJ48CAHM3_A/I reliable?
The price and inventory of SMCJ48CAHM3_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 SMCJ48CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ48CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48CAHM3_A/I?
SMCJ48CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48CAHM3_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 SMCJ48CAHM3_A/I?
For technical support, including SMCJ48CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48CAHM3_A/I requirements.
6.How does Aetrix verify that SMCJ48CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ48CAHM3_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 SMCJ48CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ48CAHM3_A/I?
All SMCJ48CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48CAHM3_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 SMCJ48CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ48CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48CAHM3_A/I Tags
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