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Vishay General Semiconductor - Diodes Division SMCJ33C-E3/9AT
- Part No.:
- SMCJ33C-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ33C-E3/9AT.pdf
- Description:
- TVS DIODE 33VWM 59VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,082
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Product details
Overview
SMCJ33C-E3/9AT from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for surge 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 - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial systems.
For engineers reviewing the SMCJ33C-E3/9AT datasheet, SMCJ33C-E3/9AT pinout, SMCJ33C-E3/9AT application, or SMCJ33C-E3/9AT equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 rating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This bi-directional TVS diode operates symmetrically in both polarities, with breakdown voltage (VBR) specified as 36.7–40.6 V at 1 mA test current. Its low incremental surge resistance and very fast response time (<1 ns) enable effective suppression of ESD, lightning-induced transients, and inductive switching spikes without affecting normal signal integrity.
The device is rated for junction temperatures from –55 °C to +150 °C, with thermal resistance junction-to-lead (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W under standard mounting conditions. It meets UL 497B recognition (QVGQ2) and is qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 36.7 V / 40.6 V at 1 mA - ensures reliable turn-on within defined tolerance band |
| VC @ IPPM | 53.3 V at 28.1 A - limits voltage seen by protected circuit during 10/1000 μs surge |
| PPPM | 1500 W - peak transient energy handling capacity per single event |
| ID @ VWM | 1.0 μA - ultra-low leakage preserves signal line integrity in high-impedance circuits |
| TJ range | –55 °C to +150 °C - supports operation in under-hood automotive and industrial environments |
| Package | DO-214AB (SMCJ) - surface-mount outline optimized for high-power dissipation and automated assembly |
Pinout & Package
SMCJ33C-E3/9AT uses the DO-214AB (SMCJ) package - a low-profile, molded plastic case with J-bend leads, UL 94 V-0 rated, and designed for high thermal performance on 8.0 mm × 8.0 mm copper pads per terminal. Bi-directional devices have no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode | Bi-directional surge path | Both terminals function identically - no cathode band; symmetrical clamping in either polarity |
| Case | Thermal and mechanical interface | Plastic body provides electrical isolation; copper pad layout directly impacts power derating and thermal stability |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, infotainment, and ADAS sensor interfaces |
| Glass passivated junction | Enhances long-term reliability and moisture resistance in harsh environments |
| MSL Level 1 (260 °C) | Enables standard lead-free reflow without preconditioning or special handling |
| Matte tin plated leads | Ensures solderability per J-STD-002 and JESD 22-B102; passes JESD 201 Class 1A whisker test |
| UL 497B recognition (QVGQ2) | Confirms compliance for telecom and industrial surge protector classification |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in vehicle ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Bi-directional TVS clamping element placed upstream of DC-DC converters and microcontrollers. Use Value: Limits rail voltage to ≤53.3 V during 1500 W surges, preventing latch-up or permanent damage to downstream silicon. | Use Scenario: Shielding analog and digital signal lines (e.g., CAN, LIN, I²C) in factory automation sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance transient shunt connected between signal and ground, preserving signal rise/fall times. Use Value: Sub-1 ns response ensures clamping occurs before sensitive input structures are overstressed, maintaining data integrity. |
| Telecom Equipment Surge Suppression | Consumer Electronics Port Protection |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired bi-directional TVS on differential pairs (e.g., TX+/TX–) referenced to chassis ground. Use Value: Symmetrical clamping maintains signal balance while absorbing up to 1500 W per line, meeting IEC 61000-4-5 Level 4 requirements. | Use Scenario: Protecting USB, HDMI, and audio jack inputs in laptops and smart home hubs from user-handling ESD. IC Role / Device Role / Timing Role: Front-end transient absorber mounted adjacent to connectors, before EMI filters and IC inputs. Use Value: 1.0 μA leakage at 33 V avoids loading high-impedance bias networks; RoHS-compliant finish ensures consumer safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC33C-TB-E3 | Same VWM (33 V), lower PPPM (600 W), smaller DO-214AC (SMA) package | Limited to lower-energy transients; unsuitable for automotive load dump | Select when board space is constrained and surge energy remains below 600 W |
| 1.5KE33CA | Through-hole TO-218 package, same VWM/VC specs, higher thermal mass but no SMT compatibility | Requires wave solder or hand assembly; not suitable for high-density PCBs | Choose only for legacy through-hole designs or prototyping where reflow is unavailable |
Compared with SAC33C-TB-E3 and 1.5KE33CA, the SMCJ33C-E3/9AT delivers superior surge robustness (1500 W vs. 600 W or 1500 W with manual assembly trade-offs) and full AEC-Q101 qualification - making it the preferred choice for production automotive and industrial SMT designs requiring validated reliability and automated manufacturability.
Availability
SMCJ33C-E3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMCJ33C-E3/9AT 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, efficiency, and application-specific validation.
The SMCJ series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMCJ33C-E3/9AT at its rated peak pulse current?
The SMCJ33C-E3/9AT has a maximum clamping voltage (VC) of 53.3 V when subjected to its rated peak pulse current (IPPM) of 28.1 A 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.
Is SMCJ33C-E3/9AT suitable for automotive applications?
Yes, SMCJ33C-E3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor modules. Its –55 °C to +150 °C operating junction temperature range, glass-passivated junction, and UL 497B recognition confirm suitability for under-hood and chassis-mounted deployments where reliability under thermal cycling and vibration is essential.
Does SMCJ33C-E3/9AT have polarity markings on the package?
No, SMCJ33C-E3/9AT is a bi-directional TVS diode and carries no polarity marking - consistent with Vishay's CA-suffix designation. The DO-214AB (SMCJ) case has no cathode band, and both terminals behave identically during transient events, enabling simplified layout and eliminating orientation errors during automated placement.
What is the maximum leakage current of SMCJ33C-E3/9AT at its stand-off voltage?
The SMCJ33C-E3/9AT exhibits a maximum reverse leakage current (ID) of 1.0 μA when biased at its rated stand-off voltage (VWM) of 33 V and tested at 25 °C. This ultra-low leakage ensures minimal impact on high-impedance signal paths and battery-powered circuits, preserving accuracy in sensor front-ends and extending operational battery life.
What packaging format does SMCJ33C-E3/9AT ship in?
SMCJ33C-E3/9AT is supplied in 13-inch diameter plastic tape and reel format (package code 9AT), with a base quantity of 3500 units per reel. This configuration supports high-speed pick-and-place assembly and is compatible with industry-standard SMT equipment - verified for J-bend lead coplanarity and moisture sensitivity level (MSL) 1 handling at peak reflow temperatures up to 260 °C.
SMCJ33C-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 25.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ33C-E3/9AT FAQ
1.How can I place an order for SMCJ33C-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ33C-E3/9AT 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 SMCJ33C-E3/9AT reliable?
The price and inventory of SMCJ33C-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ33C-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ33C-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ33C-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ33C-E3/9AT?
SMCJ33C-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ33C-E3/9AT 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 SMCJ33C-E3/9AT?
For technical support, including SMCJ33C-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ33C-E3/9AT requirements.
6.How does Aetrix verify that SMCJ33C-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ33C-E3/9AT 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 SMCJ33C-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ33C-E3/9AT?
All SMCJ33C-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ33C-E3/9AT, 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 SMCJ33C-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ33C-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ33C-E3/9AT Tags
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