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Vishay General Semiconductor - Diodes Division SMCJ48CA-M3/57T
- Part No.:
- SMCJ48CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48CA-M3/57T.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,029
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Product details
Overview
SMCJ48CA-M3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 48 V standoff voltage (VWM), 77.4 V maximum clamping voltage (VC) at 19.4 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), commonly deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ48CA-M3/57T datasheet, SMCJ48CA-M3/57T pinout, SMCJ48CA-M3/57T application, or SMCJ48CA-M3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 moisture sensitivity, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
This bidirectional TVS operates symmetrically in both polarities with identical breakdown (VBR min/max = 53.3–58.9 V at IT = 1 mA) and clamping behavior. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and fast response time (<1 ns), enabling suppression of ESD, lightning-induced transients, and inductive switching spikes.
Thermal performance is defined by RθJA = 75 °C/W (on standard 8.0 mm × 8.0 mm copper pads) and TJmax = +150 °C, supporting operation in under-hood automotive environments. The device meets UL 497B recognition and JESD201 Class 2 whisker resistance.
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 turn-on margin above VWM with tight tolerance |
| VC @ IPPM | 77.4 V at 19.4 A - Limits protected circuit voltage during 1500 W transient events |
| PPPM | 1500 W (10/1000 µs) - Withstands high-energy surges common in 12 V/24 V automotive systems |
| IPPM | 19.4 A - Peak current capability derived from standardized waveform for repeatable testing |
| TJmax | +150 °C - Enables use in high-temperature locations such as engine control modules |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
SMCJ48CA-M3/57T uses the SMC (DO-214AB) package: a molded, halogen-free, RoHS-compliant surface-mount case with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no polarity marking; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; clamps voltage in either direction when VAC exceeds VBR |
| Case (body) | Non-electrical mechanical interface | No internal connection; serves only as thermal mass and mounting structure |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity in compact SMC footprint |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking preconditioning |
| Halogen-free & RoHS-compliant (M3) | Fulfills environmental compliance requirements for automotive and industrial OEM supply chains |
| UL 497B recognized | Validates suitability for telecom and industrial signal line protection per safety standards |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs against load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of LDO regulators and PMICs. Use Value: Clamps to 77.4 V during 1500 W surges, preventing damage to downstream 5 V/3.3 V logic while maintaining system uptime. | Use Scenario: Shielding analog outputs (e.g., 4–20 mA loops) and digital I/O (CAN, LIN) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF typical) bidirectional shunt protector on signal traces. Use Value: Symmetric clamping preserves signal integrity across bidirectional buses and avoids polarity-dependent layout constraints. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY ports and DSL line drivers from induced lightning surges. IC Role / Device Role / Timing Role: First-stage transient suppressor on primary-side telecom line inputs. Use Value: UL 497B recognition confirms compliance with telecom safety standards; 75 °C/W thermal resistance enables board-level thermal management. | Use Scenario: Input-stage surge protection for AC/DC adapters in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Secondary-side DC bus protector after bridge rectifier and bulk capacitor. Use Value: 48 V VWM aligns with 5 V/12 V adapter output rails; M3 suffix satisfies global RoHS/halogen-free mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48CA-E3/57T | Lower PPPM (400 W), smaller SMA package, higher RθJA (110 °C/W) | Suitable for lower-energy transients; limited to ≤85 °C ambient or derated power | Select when space-constrained and surge energy is <500 W |
| SMCJ48CAHM3_A/H | AEC-Q101 qualified, same electrical specs, HM3 suffix denotes automotive-grade halogen-free build | Required for production automotive modules; supports PPAP documentation and extended temperature validation | Select for Tier 1 automotive programs requiring formal qualification evidence |
Compared with SMCJ48CA-M3/57T, SMAJ48CA-E3/57T trades surge capacity for footprint reduction, while SMCJ48CAHM3_A/H adds formal automotive qualification without altering clamping or thermal behavior-making it a drop-in upgrade for automotive designs needing certification traceability.
Availability
SMCJ48CA-M3/57T is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom line safeguarding requiring stable component supply and halogen-free compliance.
Supply support for SMCJ48CA-M3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series targets high-energy transient suppression in harsh environments; its design prioritizes clamping consistency, thermal robustness, and automotive-grade manufacturability for mission-critical power and signal protection.
FAQ
What is the clamping voltage of SMCJ48CA-M3/57T at its rated peak pulse current?
The SMCJ48CA-M3/57T has a maximum clamping voltage (VC) of 77.4 V when subjected to its rated peak pulse current of 19.4 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable voltage limiting during surge events. The SMCJ48CA-M3/57T maintains this clamping performance across its full operating temperature range from –55 °C to +150 °C.
Is SMCJ48CA-M3/57T suitable for automotive applications?
SMCJ48CA-M3/57T is halogen-free and RoHS-compliant but not AEC-Q101 qualified out-of-the-box. For automotive production, Vishay offers the SMCJ48CAHM3_A/H variant, which shares identical electrical specs and adds formal AEC-Q101 qualification. The SMCJ48CA-M3/57T remains appropriate for automotive prototyping, non-safety-critical subsystems, and industrial applications where qualification is not mandated.
How does the bidirectional nature of SMCJ48CA-M3/57T affect PCB layout?
The bidirectional construction of SMCJ48CA-M3/57T eliminates polarity marking and allows placement without orientation constraints-both terminals are functionally identical. This simplifies layout on differential pairs, AC-coupled lines, or floating grounds. Unlike unidirectional TVS diodes, the SMCJ48CA-M3/57T requires no cathode band alignment, reducing assembly errors and enabling automated placement without vision-based orientation verification.
What is the thermal resistance of SMCJ48CA-M3/57T, and how does it impact power dissipation?
The SMCJ48CA-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. At 25 °C ambient, its steady-state power dissipation (PD) is rated at 6.5 W. This RθJA value directly determines allowable continuous power: for example, at 85 °C ambient, max continuous power drops to ~4.3 W. The SMCJ48CA-M3/57T is intended for transient-not continuous-dissipation.
Does SMCJ48CA-M3/57T meet any safety certifications?
Yes, SMCJ48CA-M3/57T carries Underwriters Laboratories (UL) recognition under file E136766 for both unidirectional and bidirectional devices per UL 497B, covering surge protective components for telecommunications and signaling circuits. It also complies with JESD201 Class 2 whisker resistance and meets MSL Level 1 per J-STD-020, allowing reflow at 260 °C without preconditioning. The SMCJ48CA-M3/57T is not UL-listed as a standalone protectors but is UL-recognized as a component.
SMCJ48CA-M3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ48CA-M3/57T FAQ
1.How can I place an order for SMCJ48CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48CA-M3/57T 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 SMCJ48CA-M3/57T reliable?
The price and inventory of SMCJ48CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ48CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48CA-M3/57T?
SMCJ48CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48CA-M3/57T 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 SMCJ48CA-M3/57T?
For technical support, including SMCJ48CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48CA-M3/57T requirements.
6.How does Aetrix verify that SMCJ48CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ48CA-M3/57T 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 SMCJ48CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ48CA-M3/57T?
All SMCJ48CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48CA-M3/57T, 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 SMCJ48CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ48CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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