My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCJ33CAHE3/9AT
- Part No.:
- SMCJ33CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ33CAHE3/9AT.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,406
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCJ33CAHE3/9AT 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 33 V stand-off voltage (VWM), 53.3 V maximum clamping voltage (VC) at 28.1 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMCJ33CAHE3/9AT datasheet, SMCJ33CAHE3/9AT pinout, SMCJ33CAHE3/9AT application, or SMCJ33CAHE3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification for automotive use, low incremental surge resistance, and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown mechanism, with symmetrical reverse/forward characteristics due to its bidirectional construction. It delivers sub-nanosecond response time and maintains stable clamping performance across -55 °C to +150 °C junction temperature range, meeting IEC 61000-4-2/4-4/4-5 surge immunity requirements when properly laid out.
The SMCJ33CAHE3/9AT is rated for 1500 W peak pulse power under standardized 10/1000 µs transients and exhibits a typical thermal resistance of 75 °C/W (junction-to-ambient) on recommended PCB pad layout - enabling reliable operation without heatsinking in most board-level protection applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 36.7 V / 40.6 V at 1 mA - guaranteed breakdown threshold ensures predictable turn-on margin |
| VC @ IPPM | 53.3 V at 28.1 A - limits downstream voltage stress during 10/1000 µs surges |
| PPPM | 1500 W - sustains high-energy transients such as load dump or inductive switching spikes |
| TJ max | +150 °C - supports under-hood automotive environments and industrial enclosures |
| Package | SMC (DO-214AB) - surface-mount footprint compatible with IPC-7351B standard land pattern |
| AEC-Q101 | Qualified - validated for automotive-grade reliability per stress test requirements |
Pinout & Package
SMCJ33CAHE3/9AT uses the SMC (DO-214AB) package: a rectangular surface-mount case measuring 7.11 mm × 6.22 mm × 2.62 mm with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (during positive half-cycle) | One side of symmetrical avalanche junction - conducts surge energy into ground or return path |
| Cathode | Transient current entry (during negative half-cycle) | Electrically identical to Anode in bidirectional configuration - enables clamping in both voltage polarities |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics where long-term field reliability is mandatory |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients like ESD or relay bounce |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak - simplifies manufacturing logistics |
| UL 94 V-0 molding compound | Meets flammability safety standards for enclosed industrial and automotive assemblies |
Applications
| Automotive Power Distribution | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed control modules against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed between power input and DC/DC converter input stage. Use Value: Limits transient voltage to ≤53.3 V, preventing damage to downstream LDOs and microcontrollers rated for 40 V absolute maximum. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance shunt protector located at connector interface before signal conditioning amplifier. Use Value: Clamps ±8 kV contact ESD (IEC 61000-4-2) without distorting mV-level sensor signals due to symmetrical low-leakage design. |
| Telecom Line Card Protection | Consumer Appliance Motor Control |
Use Scenario: Safeguarding Ethernet PHY power pins and data lines against lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after primary gas discharge tube (GDT) in hybrid protection scheme. Use Value: Responds within <1 ns to clamp residual transients to safe levels, preserving PHY IC integrity during multi-kA surge events. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Across-the-rail protector bridging motor driver H-bridge supply and ground planes. Use Value: Absorbs 1500 W repetitive spikes without degradation, extending MOSFET lifetime and reducing electromagnetic emissions. |
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 | Lower PPPM (600 W), same VWM and VC, smaller SMA package | Not AEC-Q101 qualified; limited to consumer/industrial non-automotive use | Select when space-constrained layouts prioritize footprint over surge energy handling |
| 1.5KE33CA | Through-hole DO-201 package, higher thermal mass but incompatible with SMT lines | Lacks MSL Level 1 and AEC-Q101 compliance; unsuitable for automotive production | Choose only for prototyping or legacy through-hole designs requiring identical electrical specs |
Compared with SAC33CA and 1.5KE33CA, the SMCJ33CAHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge capability, and SMC package compatibility with high-volume automated assembly - making it the preferred choice for automotive and industrial OEM production.
Availability
SMCJ33CAHE3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drives, and telecom infrastructure equipment requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ33CAHE3/9AT 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 and application-specific optimization.
The SMCJ series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure tolerance and long-term stability are critical.
FAQ
What is the clamping voltage of SMCJ33CAHE3/9AT at its rated peak pulse current?
The SMCJ33CAHE3/9AT has a maximum clamping voltage (VC) of 53.3 V at 28.1 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per JEDEC standards and guarantees that downstream circuitry sees no more than 53.3 V during specified surge events - a critical parameter for protecting 3.3 V or 5 V logic interfaces and power management ICs in the SMCJ33CAHE3/9AT's protected domain.
Is SMCJ33CAHE3/9AT suitable for automotive applications?
Yes, SMCJ33CAHE3/9AT is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It meets stress test requirements including temperature cycling, humidity bias, and mechanical shock - validated for deployment in engine control units, body control modules, and ADAS sensor subsystems where reliability under vibration, thermal cycling, and electrical transients is mandatory. The SMCJ33CAHE3/9AT's qualification documentation is available from Vishay upon request.
How does the bidirectional nature of SMCJ33CAHE3/9AT affect its PCB layout?
The bidirectional construction of SMCJ33CAHE3/9AT eliminates polarity marking - both terminals are functionally identical, allowing placement without orientation constraints. This simplifies layout routing for AC-coupled lines or differential pairs and avoids assembly errors. However, thermal pad design must still follow Vishay's recommended 8.0 mm × 8.0 mm copper area per terminal to maintain rated PPPM and thermal performance - a requirement unchanged from unidirectional variants.
What is the maximum operating temperature for SMCJ33CAHE3/9AT?
The SMCJ33CAHE3/9AT has a maximum junction temperature (TJ max) of +150 °C and operates reliably from -55 °C to +150 °C. This wide range supports under-hood automotive locations and industrial enclosures exposed to ambient temperatures up to +105 °C, provided PCB thermal design maintains junction temperature below limit. Derating curves in the datasheet show 50% PPPM reduction at TJ = 125 °C, confirming the SMCJ33CAHE3/9AT's suitability for thermally demanding deployments.
Does SMCJ33CAHE3/9AT require external heat sinking?
No, the SMCJ33CAHE3/9AT is designed for operation without external heat sinking when mounted on the recommended minimum pad layout: 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. Its typical RθJA of 75 °C/W ensures adequate thermal dissipation for transient-only duty cycles. Continuous power dissipation is limited to 6.5 W at TA = 50 °C - well below its 1500 W surge rating - so sustained DC loading is not intended. The SMCJ33CAHE3/9AT relies on PCB copper as its primary thermal path.
SMCJ33CAHE3/9AT 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)
SMCJ33CAHE3/9AT FAQ
1.How can I place an order for SMCJ33CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ33CAHE3/9AT 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 SMCJ33CAHE3/9AT reliable?
The price and inventory of SMCJ33CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ33CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ33CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ33CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ33CAHE3/9AT?
SMCJ33CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ33CAHE3/9AT 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 SMCJ33CAHE3/9AT?
For technical support, including SMCJ33CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ33CAHE3/9AT requirements.
6.How does Aetrix verify that SMCJ33CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ33CAHE3/9AT 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 SMCJ33CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ33CAHE3/9AT?
All SMCJ33CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ33CAHE3/9AT, 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 SMCJ33CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCJ33CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ33CAHE3/9AT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
