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Vishay General Semiconductor - Diodes Division SMCJ30CAHE3_A/I
- Part No.:
- SMCJ30CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ30CAHE3_A/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,454
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Product details
Overview
SMCJ30CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 30 V stand-off voltage (VWM), 48.4 V maximum clamping voltage (VC) at 31.0 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive power line and industrial sensor interface protection.
For engineers reviewing the SMCJ30CAHE3_A/I datasheet, SMCJ30CAHE3_A/I pinout, SMCJ30CAHE3_A/I application, or SMCJ30CAHE3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, low thermal resistance (RθJL = 15 °C/W), and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD events. Its bidirectional architecture ensures symmetrical clamping in both polarities, with breakdown voltage (VBR) specified at 33.3–36.8 V (min/max) under 1.0 mA test current - meeting ANSI/IEEE C62.35 standards for surge suppression.
Thermally, it sustains operation from –55 °C to +150 °C junction temperature, with derated pulse power above 25 °C per Fig. 2. The glass-passivated junction and matte tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 33.3 V / 36.8 V - guaranteed breakdown range at 1.0 mA, defining turn-on threshold tolerance |
| VC @ IPPM | 48.4 V - clamped voltage during 31.0 A 10/1000 μs surge, limiting downstream stress |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| RθJL | 15 °C/W - low junction-to-lead thermal resistance enabling efficient heat transfer to PCB copper |
| TJ max. | +150 °C - maximum junction temperature rating supporting under-hood automotive use |
| AEC-Q101 | Qualified - validated for automotive-grade reliability per stress test requirements |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; polarity unmarked for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode side) | Transient current sink path | One terminal of symmetrical PN junction - conducts surge current in either direction |
| Anode (Cathode side) | Transient current sink path | Second terminal of symmetrical PN junction - completes bidirectional clamping loop |
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 power distribution modules and body control units |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 4 surges without degradation |
| Low RθJL (15 °C/W) | Reduces thermal runaway risk during repetitive transients when mounted on 8 mm × 8 mm copper pads |
| MSL Level 1 | Allows unlimited floor life and reflow at 260 °C peak, compatible with standard lead-free assembly |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O against load dump and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Shunt clamping device placed between power rail and ground, activated only during overvoltage events. Use Value: Limits voltage to ≤48.4 V during 31 A surges, preventing latch-up or gate oxide damage in connected ICs. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors exposed to motor drive noise in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp across differential signal pair or supply-to-ground path. Use Value: Maintains signal integrity by suppressing ±30 V transients while adding <1 pF capacitance at 0 V bias. |
| Telecom DC Power Input | Consumer Appliance Motor Control |
Use Scenario: Input-stage protection for PoE-powered network switches subjected to lightning-induced surges on 48 V DC input rails. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converters and hot-swap controllers. Use Value: Absorbs 1500 W transient energy without failure, preserving system uptime and reducing need for redundant protection stages. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals or H-bridge supply rails. Use Value: Clamps inductive kickback to 48.4 V, preventing MOSFET avalanche breakdown and extending power stage lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC30CA | Lower PPPM (600 W), same VWM (30 V), smaller SMA package (DO-214AC) | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Select when board space is constrained and automotive qualification is unnecessary |
| SMCJ33CAHE3_A/I | Higher VWM (33 V), higher VBR (36.7–40.6 V), identical package and AEC-Q101 status | Better margin for 3.3 V logic rails with higher noise immunity; slightly reduced clamping headroom | Select when protecting 3.3 V systems where tighter VWM tolerance reduces false triggering |
Compared with SAC30CA and SMCJ33CAHE3_A/I, the SMCJ30CAHE3_A/I delivers optimal balance of automotive qualification, 1500 W surge capacity, and precise 30 V stand-off - making it preferred for safety-critical 12 V power domains requiring validated reliability and high-energy clamping.
Availability
SMCJ30CAHE3_A/I is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ30CAHE3_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 performance.
The SMCJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom infrastructure where robustness against ISO 7637 and IEC 61000-4-5 threats is mandatory.
FAQ
What is the clamping voltage of SMCJ30CAHE3_A/I at its rated peak pulse current?
The SMCJ30CAHE3_A/I has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated 31.0 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMCJ30CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMCJ30CAHE3_A/I suitable for automotive applications?
Yes, the SMCJ30CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix. It meets stress test requirements for temperature cycling, humidity, mechanical shock, and surge endurance relevant to engine control units, body electronics, and infotainment power supplies. Its SMC package supports automated placement on automotive PCBs, and its –55 °C to +150 °C operating range accommodates under-hood thermal environments - confirming SMCJ30CAHE3_A/I as a production-ready automotive-grade TVS.
How does the bidirectional design of SMCJ30CAHE3_A/I affect its circuit implementation?
The bidirectional design of SMCJ30CAHE3_A/I eliminates polarity marking and enables direct placement across AC-coupled lines, floating buses, or supply-to-ground paths without orientation concerns. Unlike unidirectional TVS diodes, the SMCJ30CAHE3_A/I provides symmetrical clamping in both directions - essential for protecting differential interfaces (e.g., CAN, RS-485) or dual-rail systems. Its DO-214AB package has no cathode band, simplifying layout and reducing assembly errors - a functional distinction confirmed in Vishay's ordering documentation for all "CA"-suffixed SMCJ variants.
What is the thermal resistance from junction to lead (RθJL) for SMCJ30CAHE3_A/I, and why does it matter?
The SMCJ30CAHE3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, measured per JEDEC standards. This low value enables rapid heat transfer from the silicon junction to the PCB copper pads during repetitive surge events - directly improving reliability in applications with frequent transients, such as motor drives or power supply inputs. When mounted on the recommended 8.0 mm × 8.0 mm copper pads, this RθJL allows the SMCJ30CAHE3_A/I to sustain higher duty-cycle surges without exceeding its +150 °C maximum junction temperature limit.
Can SMCJ30CAHE3_A/I be used in place of a unidirectional TVS like SMCJ30AHE3_A/I?
No - the SMCJ30CAHE3_A/I is bidirectional and lacks polarity marking, whereas the unidirectional SMCJ30AHE3_A/I requires correct cathode orientation to function. Substituting them without circuit review risks improper clamping behavior: the SMCJ30CAHE3_A/I will conduct in both directions, potentially disrupting DC bias points or causing leakage in unidirectional signal paths. Their VBR and VC values also differ slightly (SMCJ30A: VBR = 33.3–36.8 V, VC = 48.4 V; SMCJ30CA: same values but symmetrical). Always verify topology compatibility before replacing SMCJ30AHE3_A/I with SMCJ30CAHE3_A/I.
SMCJ30CAHE3_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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 31A
- 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)
SMCJ30CAHE3_A/I FAQ
1.How can I place an order for SMCJ30CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ30CAHE3_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 SMCJ30CAHE3_A/I reliable?
The price and inventory of SMCJ30CAHE3_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 SMCJ30CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ30CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ30CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ30CAHE3_A/I?
SMCJ30CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ30CAHE3_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 SMCJ30CAHE3_A/I?
For technical support, including SMCJ30CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ30CAHE3_A/I requirements.
6.How does Aetrix verify that SMCJ30CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ30CAHE3_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 SMCJ30CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ30CAHE3_A/I?
All SMCJ30CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ30CAHE3_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 SMCJ30CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ30CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ30CAHE3_A/I Tags
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