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Vishay General Semiconductor - Diodes Division SMCJ48CAHE3_A/I
- Part No.:
- SMCJ48CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48CAHE3_A/I.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,410
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Product details
Overview
SMCJ48CAHE3_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 1500 W peak pulse power with a 10/1000 μs waveform, 77.4 V maximum clamping voltage at 19.4 A peak surge current, and 48 V standoff voltage - deployed in automotive sensor signal lines, industrial I/O protection, and telecom interface circuits.
For engineers reviewing the SMCJ48CAHE3_A/I datasheet, SMCJ48CAHE3_A/I pinout, SMCJ48CAHE3_A/I application, or SMCJ48CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, low thermal resistance (RθJL = 15 °C/W), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown junction, delivering symmetrical reverse/forward conduction for bidirectional transient suppression. Its glass-passivated chip junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMC package supports high thermal dissipation under repetitive surge conditions.
Rated for -55 °C to +150 °C operating junction temperature, it meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive use. The 48 V standoff voltage (VWM) and 53.3–58.9 V breakdown range (VBR) define its precise clamping threshold before entering avalanche conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains high-energy transients without failure in automotive load-dump or ESD events |
| Standoff Voltage (VWM) | 48 V - maximum continuous reverse voltage before leakage exceeds 1 μA, matching 48 V system rails |
| Breakdown Voltage (VBR) | 53.3–58.9 V at 1 mA - defines reliable avalanche initiation window for predictable clamping onset |
| Clamping Voltage (VC) | 77.4 V at 19.4 A IPPM - limits downstream voltage stress during worst-case surge conditions |
| Junction Temperature Range | -55 °C to +150 °C - enables operation in under-hood automotive and industrial ambient environments |
| Thermal Resistance (Junction-to-Lead) | 15 °C/W - allows efficient heat transfer to PCB copper pads, critical for sustained surge handling |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1, 260 °C reflow compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetric with cathode in bidirectional mode | No polarity marking on device body; both terminals behave identically during transient clamping |
| Cathode | Current exit terminal in forward bias; functionally identical to anode for bidirectional operation | Unmarked package - device lacks band or polarity indicator, confirming true bidirectional symmetry |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge events in 48 V systems |
| AEC-Q101 qualification | Validates long-term reliability in automotive ECUs, ADAS sensors, and body control modules |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD > 30 kV), improving system robustness |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and jump-start surges in vehicle cabin modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal pair or supply rail to limit transient excursions below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to transceivers during 12/48 V system faults, maintaining communication integrity without adding series impedance. |
Use Scenario: Safeguarding analog input channels (4–20 mA, 0–10 V) in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff-connected TVS shunting induced transients before they reach precision ADC front-end or op-amp buffers. Use Value: Maintains measurement accuracy by limiting voltage excursion to ≤77.4 V, well below typical 30 V op-amp supply rails and isolation barrier ratings. |
| Telecom Interface Protection | Power Supply Rail Clamping |
|
Use Scenario: Shielding Ethernet PHY magnetics and PoE interface circuitry from lightning-induced surges on outdoor data lines. IC Role / Device Role / Timing Role: Common-mode TVS array element (used in pairs) suppressing differential and common-mode transients on twisted-pair lines. Use Value: Achieves <1 ns response with 77.4 V clamping, preserving signal integrity for 100BASE-TX and 1000BASE-T while meeting IEC 61000-4-5 Level 4. |
Use Scenario: Secondary overvoltage protection on 48 V intermediate bus rails feeding DC-DC converters in telecom rectifiers and base stations. IC Role / Device Role / Timing Role: Parallel-connected clamping device that activates only during fault conditions exceeding 48 V nominal, avoiding steady-state power loss. Use Value: Limits rail voltage to 77.4 V during surge events, preventing catastrophic failure of downstream MOSFETs and gate drivers rated for 100 V max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC48CA | Same 48 V VWM, but lower 600 W PPPM rating and TO-220AC package - higher RθJA (50 °C/W) | Requires heatsinking for equivalent surge duty; unsuitable for high-density SMT layouts | Select when through-hole mounting or legacy board reuse is required, not for space-constrained automotive modules |
| SMCJ48CAHM3_A/I | Identical electrical specs and AEC-Q101 qualification; differs only in halogen-free material content (HM3 vs HE3) | No functional difference; HM3 meets stricter environmental compliance (e.g., EU automotive OEM requirements) | Choose HM3 if halogen-free certification is mandated; otherwise HE3 offers same performance at standard cost |
Compared with SAC48CA, SMCJ48CAHE3_A/I delivers 2.5× higher surge power in half the footprint with superior thermal coupling to PCB; versus SMCJ48CAHM3_A/I, it provides identical protection with standard RoHS compliance - making it optimal for cost-sensitive AEC-Q101 automotive designs where halogen-free is not required.
Availability
SMCJ48CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom interface surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCJ48CAHE3_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 protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series targets high-energy transient suppression in harsh environments, engineered for automotive, industrial, and telecom systems where failure resilience and AEC-Q101 validation are mandatory design requirements.
FAQ
What is the clamping voltage of SMCJ48CAHE3_A/I at its rated peak pulse current?
The SMCJ48CAHE3_A/I has a maximum clamping voltage (VC) of 77.4 V at its rated peak pulse current (IPPM) of 19.4 A, measured under the standardized 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ48CAHE3_A/I achieves this with low dynamic impedance, ensuring consistent protection performance in real-world transients.
Is SMCJ48CAHE3_A/I suitable for automotive applications?
Yes, the SMCJ48CAHE3_A/I is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, ADAS sensors, and body electronics. Its construction features glass-passivated junctions, MSL Level 1 moisture sensitivity, and operation up to +150 °C junction temperature - all verified per AEC-Q101 test conditions. The SMCJ48CAHE3_A/I also meets ISO 7637-2 and IEC 61000-4-5 surge immunity requirements common in vehicle subsystems.
How does the bidirectional configuration of SMCJ48CAHE3_A/I affect its placement on the PCB?
The SMCJ48CAHE3_A/I has no polarity marking and functions identically in both directions, eliminating orientation constraints during automated placement. Unlike unidirectional TVS diodes, it requires no alignment to cathode bands, reducing assembly errors and enabling flexible layout in AC-coupled or differential signal paths. This symmetry is confirmed by identical VBR and VC specifications in both polarities - a key advantage of the SMCJ48CAHE3_A/I in high-reliability routing scenarios.
What is the thermal resistance from junction to lead (RθJL) for SMCJ48CAHE3_A/I?
The SMCJ48CAHE3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, measured under standard SMC mounting conditions. This low value enables efficient heat transfer from the silicon die directly into the PCB copper pads via the device's leads, supporting repeated surge events without thermal runaway. When used with the recommended 8.0 mm × 8.0 mm copper pad per terminal, the SMCJ48CAHE3_A/I maintains safe junction temperatures even under 1500 W pulse loads.
Does SMCJ48CAHE3_A/I require external current limiting in series?
No, the SMCJ48CAHE3_A/I operates as a shunt protector and does not require series current-limiting resistors for basic transient suppression. Its low dynamic impedance ensures rapid clamping without added components. However, in applications with sustained overvoltage (e.g., prolonged short-circuit), a fuse or polyfuse may be needed upstream to prevent thermal failure - the SMCJ48CAHE3_A/I itself is rated for non-repetitive pulses only, as defined in its datasheet derating curves.
SMCJ48CAHE3_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:
- -
- 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_A/I FAQ
1.How can I place an order for SMCJ48CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48CAHE3_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 SMCJ48CAHE3_A/I reliable?
The price and inventory of SMCJ48CAHE3_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 SMCJ48CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ48CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48CAHE3_A/I?
SMCJ48CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48CAHE3_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 SMCJ48CAHE3_A/I?
For technical support, including SMCJ48CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48CAHE3_A/I requirements.
6.How does Aetrix verify that SMCJ48CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ48CAHE3_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 SMCJ48CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ48CAHE3_A/I?
All SMCJ48CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48CAHE3_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 SMCJ48CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ48CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48CAHE3_A/I Tags
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