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Vishay General Semiconductor - Diodes Division SMCJ33CAHE3/57T
- Part No.:
- SMCJ33CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ33CAHE3/57T.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,748
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Product details
Overview
SMCJ33CAHE3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 33 V standoff voltage (VWM), and 53.3 V clamping voltage (VC) at 28.1 A peak pulse current (IPPM). It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive, industrial, and telecom systems against inductive switching transients and lightning-induced surges.
For engineers reviewing the SMCJ33CAHE3/57T datasheet, SMCJ33CAHE3/57T pinout, SMCJ33CAHE3/57T application, or SMCJ33CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge handling, low clamping ratio (VC/VWM ≈ 1.62), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 33 V), but triggers into low-impedance conduction when transient voltage exceeds its breakdown range (36.7–40.6 V at 1 mA). Its glass-passivated junction ensures stable avalanche characteristics and fast response (<1 ns).
The device is rated for -55 °C to +150 °C operating junction temperature, features MSL Level 1 moisture sensitivity, and meets UL 497B recognition (QVGQ2) for surge protectors. Its thermal resistance (RθJA = 75 °C/W) supports operation without heatsinking on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 36.7–40.6 V at 1 mA - Confirmed avalanche threshold range; ensures reliable triggering above system nominal voltage. |
| VC (Clamping Voltage) | 53.3 V at IPPM = 28.1 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines maximum stress on downstream components. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capacity for standardized 10/1000 μs waveform; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| ID (Reverse Leakage) | 1.0 μA max at 33 V - Negligible standby current; avoids loading of high-impedance signal or bias networks. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; designated by HE3 suffix. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking (unlike unidirectional variants which feature cathode band).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Common terminal for symmetrical clamping; connects to ground or reference plane in differential or common-mode protection schemes. |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA devices; forms dual-junction structure enabling equal clamping in both directions. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Equal VBR and VC in both polarities - eliminates need for orientation-aware placement; simplifies layout for AC-coupled or floating signal lines. |
| AEC-Q101 qualification | Validated for automotive electronics - supports deployment in ADAS sensors, body control modules, and infotainment without additional qualification effort. |
| Low clamping ratio (VC/VWM) | 1.62 - Minimizes overvoltage exposure to protected ICs; critical for safeguarding 3.3 V or 5 V logic interfaces. |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - enables standard lead-free reflow without baking or special handling. |
| Glass-passivated junction | Stable avalanche performance over lifetime - prevents parameter drift due to humidity or contamination in harsh environments. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) in engine control units against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed across signal/power pins to clamp surges before they reach the IC's ESD structures. Use Value: Withstands 1500 W surges while limiting voltage to 53.3 V - preserves integrity of 5 V tolerant transceivers and avoids latch-up in microcontrollers. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring transients. IC Role / Device Role / Timing Role: Primary front-end surge limiter on DIN-rail mounted I/O modules, positioned before optocoupler or Schmitt trigger input stages. Use Value: 33 V VWM matches typical 24 V system tolerance; 53.3 V VC ensures downstream isolation barriers remain within breakdown limits. |
| Telecom Line Interface | Consumer Power Adapter EMI Filtering |
Use Scenario: Secondary-side surge suppression on Ethernet PHY power rails and MDI-X data pairs in PoE-powered switches and routers. IC Role / Device Role / Timing Role: Bidirectional clamping element across DC supply lines and differential signal pairs to absorb common-mode and differential-mode transients. Use Value: Symmetrical response handles both positive and negative surges from lightning-induced coupling; 1500 W rating exceeds IEC 61000-4-5 requirements. |
Use Scenario: Input-stage transient protection on secondary-side 5 V/12 V rails of USB-C PD adapters and smart home power supplies. IC Role / Device Role / Timing Role: Final line-of-defense after Y-capacitor and common-mode choke, clamping residual surges that penetrate primary-side protection. Use Value: Low 1.0 μA leakage avoids efficiency loss; compact SMC package fits tight board space near output connectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC33CA | Same VWM (33 V) and bidirectional function, but lower PPPM (600 W); smaller SMA package (DO-214AC). | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for automotive load dump or industrial motor drive environments. | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports). |
| SMCJ33CAHM3/57T | Identical electrical specs and AEC-Q101 qualification, but halogen-free (HM3) instead of standard RoHS (HE3); same SMC package. | No functional difference; chosen only when halogen-free compliance is mandated by OEM or regional environmental regulations. | Direct material substitution where halogen-free BOMs are required; no design or layout changes needed. |
Compared with SAC33CA, SMCJ33CAHE3/57T delivers 2.5× higher surge energy handling and automotive qualification; compared with SMCJ33CAHM3/57T, it offers identical protection performance with standard RoHS compliance-making it optimal for cost-sensitive AEC-Q101 designs without halogen restrictions.
Availability
SMCJ33CAHE3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom line cards, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ33CAHE3/57T 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, power efficiency, and automotive-grade validation.
The SMCJ series is engineered for high-energy transient suppression in demanding environments, targeting automotive, industrial, and telecom applications where robustness against repetitive surges and long-term stability are critical.
FAQ
What is the clamping voltage of the SMCJ33CAHE3/57T under a 10/1000 µs surge?
The SMCJ33CAHE3/57T clamps to a maximum of 53.3 V when subjected to its rated peak pulse current of 28.1 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88394, ensuring predictable protection behavior for downstream 3.3 V or 5 V ICs. The SMCJ33CAHE3/57T maintains this clamping performance across its full operating temperature range.
Is the SMCJ33CAHE3/57T suitable for automotive applications?
Yes, the SMCJ33CAHE3/57T is AEC-Q101 qualified, as indicated by the "HE3" suffix, and is explicitly listed in Vishay's documentation for automotive use. It meets requirements for temperature cycling, high-temperature reverse bias, and mechanical shock, making it appropriate for engine control units, ADAS sensors, and body electronics. The SMCJ33CAHE3/57T is rated for junction temperatures up to +150 °C and supports reflow soldering per J-STD-020 MSL Level 1.
How does the bidirectional design of the SMCJ33CAHE3/57T affect PCB layout?
The SMCJ33CAHE3/57T has no polarity marking and functions identically in both directions, eliminating orientation constraints during automated placement. Unlike unidirectional SMCJ variants (e.g., SMCJ33A), it requires no cathode alignment-reducing placement errors and simplifying layout for AC-coupled lines, differential buses, or floating grounds. The SMCJ33CAHE3/57T uses the same SMC (DO-214AB) footprint but removes the need for silkscreen polarity indicators or orientation verification.
What is the maximum reverse leakage current for the SMCJ33CAHE3/57T at its stand-off voltage?
The SMCJ33CAHE3/57T exhibits a maximum reverse leakage current (ID) of 1.0 μA at its 33 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage ensures minimal impact on high-impedance sensor bias networks or battery-powered circuits. The SMCJ33CAHE3/57T maintains leakage below 5 μA even at elevated temperatures up to +85 °C, supporting precision analog and low-power IoT applications.
Does the SMCJ33CAHE3/57T require a heatsink for standard operation?
No, the SMCJ33CAHE3/57T is designed for operation without an external heatsink when mounted on the recommended 8.0 mm × 8.0 mm copper pads per terminal, delivering its full 1500 W peak pulse power rating. Its thermal resistance (RθJA = 75 °C/W) and 6.5 W steady-state power dissipation (PD) are fully supported by standard PCB copper area. The SMCJ33CAHE3/57T achieves this performance while remaining compatible with standard SMT reflow profiles and MSL Level 1 handling.
SMCJ33CAHE3/57T 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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 28.1A
- 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)
SMCJ33CAHE3/57T FAQ
1.How can I place an order for SMCJ33CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ33CAHE3/57T 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 SMCJ33CAHE3/57T reliable?
The price and inventory of SMCJ33CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ33CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ33CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ33CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ33CAHE3/57T?
SMCJ33CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ33CAHE3/57T 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 SMCJ33CAHE3/57T?
For technical support, including SMCJ33CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ33CAHE3/57T requirements.
6.How does Aetrix verify that SMCJ33CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ33CAHE3/57T 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 SMCJ33CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ33CAHE3/57T?
All SMCJ33CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ33CAHE3/57T, 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 SMCJ33CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ33CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ33CAHE3/57T Tags
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