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Vishay General Semiconductor - Diodes Division SMCJ48CAHE3/57T
- Part No.:
- SMCJ48CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48CAHE3/57T.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,776
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Product details
Overview
SMCJ48CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features a 48 V stand-off voltage (VWM), 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 ECUs, industrial I/O modules, and telecom power rails.
For engineers reviewing the SMCJ48CAHE3/57T datasheet, SMCJ48CAHE3/57T pinout, SMCJ48CAHE3/57T application, or SMCJ48CAHE3/57T equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, 1500 W surge rating, thermal resistance (RθJA = 75 °C/W), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ48CAHE3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both directions due to its bidirectional construction. Its breakdown voltage (VBR) ranges from 53.3 V to 58.9 V at 1 mA test current, with temperature coefficient of 0.103 %/°C - ensuring stable overvoltage response across -55 °C to +150 °C operating range.
It meets J-STD-020 MSL Level 1 (peak reflow ≤ 260 °C), supports JEDEC-compliant soldering per J-STD-002 and JESD 22-B102, and is qualified to AEC-Q101 for automotive use - distinguishing it from commercial-grade variants by enhanced reliability testing and whisker resistance (JESD 201 Class 2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 53.3 V / 58.9 V at 1 mA - defines guaranteed avalanche onset window under DC bias |
| VC @ IPPM | 77.4 V at 19.4 A - clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 1500 W - peak surge energy absorption capability without failure |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; dimensions 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); UL 94 V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward conduction | Bidirectional symmetry means no polarity marking; both terminals function identically under reverse/forward surge |
| Cathode | Current exit terminal in forward conduction | No band marking - distinguishes bidirectional SMCJ48CAHE3/57T from unidirectional variants (e.g., SMCJ48A) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal/power lines without polarity concerns |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) without degradation |
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment power inputs |
| MSL Level 1 rating | Allows single-reflow assembly without moisture sensitivity handling - reduces manufacturing overhead |
| Glass-passivated junction | Improves long-term stability and leakage performance versus epoxy-passivated alternatives |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied microcontroller inputs in body control modules against load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Primary clamping device placed upstream of LDO regulators and CAN transceivers. Use Value: Limits voltage to ≤77.4 V during 100 A/100 ms load dump events, preventing latch-up or gate oxide damage in downstream ICs. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input cards. IC Role / Device Role / Timing Role: Bidirectional shunt protector on 4–20 mA current loop lines exposed to field wiring ESD and inductive kickback. Use Value: Symmetrical clamping ensures equal protection during positive/negative transients, preserving sensor accuracy and loop integrity. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding PoE-powered Ethernet switch ports from lightning-induced surges on 48 V DC supply lines. IC Role / Device Role / Timing Role: First-stage TVS on primary DC input before DC-DC converters and hot-swap controllers. Use Value: Absorbs up to 1500 W surge energy while maintaining <1 μA leakage at 48 V - minimizing standby power loss. | Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to clamp commutation spikes before reaching MCU GPIOs and driver FETs. Use Value: Clamps transients within 1 ns, preventing false triggering of overvoltage protection and extending MCU lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48CAHE3/A | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Suitable only for lower-energy surges (IEC 61000-4-2 ±8 kV contact); not recommended for load dump | Select when board space is constrained and surge threat level is limited to ESD or low-energy switching noise. |
| SMCJ48CAHM3/57T | Identical electrical specs and AEC-Q101 qualification; halogen-free molding compound (per Vishay material spec) | No functional difference; used where RoHS + halogen-free compliance is mandated (e.g., EU automotive Tier 1) | Direct material-compliance alternative - same layout, same thermal and electrical behavior. |
Compared with SMAJ48CAHE3/A, the SMCJ48CAHE3/57T delivers 3.75× higher surge power handling and superior thermal dissipation; versus SMCJ48CAHM3/57T, it shares identical performance but differs only in halogen content - making HE3 the default choice unless halogen-free certification is contractually required.
Availability
SMCJ48CAHE3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial I/O protection, and telecom power rail designs requiring stable component supply, AEC-Q101 assurance, and high-reliability surge immunity.
Supply support for SMCJ48CAHE3/57T 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMCJ series targets high-energy transient suppression in harsh environments; its design prioritizes robust clamping, low leakage, and process-controlled avalanche characteristics for mission-critical power and signal line protection.
FAQ
What is the clamping voltage of SMCJ48CAHE3/57T at its rated peak pulse current?
The SMCJ48CAHE3/57T has a maximum clamping voltage (VC) of 77.4 V at 19.4 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 77.4 V during standardized surge events - critical for protecting 5 V or 3.3 V logic interfaces fed through voltage regulators.
Is SMCJ48CAHE3/57T suitable for automotive applications?
Yes, SMCJ48CAHE3/57T is AEC-Q101 qualified and specifically intended for automotive use. Its qualification includes temperature cycling, high-temperature reverse bias (HTRB), and mechanical shock testing. The HE3 suffix denotes RoHS-compliant and AEC-Q101-qualified construction, making SMCJ48CAHE3/57T appropriate for engine control units, ADAS camera modules, and infotainment power supplies.
How does the bidirectional configuration of SMCJ48CAHE3/57T affect PCB layout?
The SMCJ48CAHE3/57T has no polarity marking (no cathode band), simplifying PCB layout for AC-coupled or floating lines. Unlike unidirectional TVS diodes, it requires no orientation check during placement - reducing assembly errors and enabling symmetric routing on differential pairs or transformer-coupled interfaces. Its DO-214AB footprint remains identical to unidirectional variants, allowing shared land patterns.
What is the thermal resistance of SMCJ48CAHE3/57T, and how does it impact derating?
The SMCJ48CAHE3/57T 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 ambient temperatures above 25 °C, its peak pulse power must be linearly derated - e.g., at 75 °C ambient, maximum PPPM drops to ~1000 W. This derating curve is defined in Figure 2 of Vishay document 88394 and must be applied in thermally dense automotive or industrial layouts.
Does SMCJ48CAHE3/57T meet moisture sensitivity requirements for standard SMT reflow?
Yes, SMCJ48CAHE3/57T is rated MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/60% RH and withstand peak reflow temperatures up to 260 °C without baking. This eliminates moisture sensitivity handling steps, streamlining high-volume SMT assembly and reducing risk of popcorning or delamination during lead-free reflow profiles.
SMCJ48CAHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ48CAHE3/57T FAQ
1.How can I place an order for SMCJ48CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48CAHE3/57T 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 SMCJ48CAHE3/57T reliable?
The price and inventory of SMCJ48CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ48CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48CAHE3/57T?
SMCJ48CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48CAHE3/57T 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 SMCJ48CAHE3/57T?
For technical support, including SMCJ48CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48CAHE3/57T requirements.
6.How does Aetrix verify that SMCJ48CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ48CAHE3/57T 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 SMCJ48CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ48CAHE3/57T?
All SMCJ48CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48CAHE3/57T, 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 SMCJ48CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ48CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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