My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCG33A-E3/9AT
- Part No.:
- SMCG33A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG33A-E3/9AT.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,875
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCG33A-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), and clamps transients to ≤53.3 V at 28.1 A (10/1000 µs waveform), making it suitable for automotive power line and industrial sensor interface protection.
For engineers reviewing the SMCG33A-E3/9AT datasheet, SMCG33A-E3/9AT pinout, SMCG33A-E3/9AT application, or SMCG33A-E3/9AT equivalent, key selection criteria include its AEC-Q101 qualification, 150 °C maximum junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on standard PCB pads per J-STD-002.
Technical Context
The SMCG33A-E3/9AT operates as a unidirectional avalanche diode, leveraging glass-passivated silicon junction technology to deliver fast response time (<1 ns) and stable clamping under repetitive surge conditions. Its electrical behavior follows IEEE C62.35 standards, with clamping voltage defined at peak pulse current (IPPM = 28.1 A) and thermal performance governed by RθJA = 75 °C/W and RθJL = 15 °C/W.
It is rated for non-repetitive 8.3 ms half-sine surge current up to 200 A (IFSM), and derates linearly above TA = 25 °C per Figure 2. The device exhibits <1 μA reverse leakage at VWM and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
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 - Ensures reliable avalanche turn-on within tight tolerance band |
| VC @ IPPM | ≤53.3 V at 28.1 A (10/1000 µs) - Defines worst-case clamped voltage seen by protected circuitry |
| PPPM | 1500 W - Peak transient energy absorption capability under standardized surge waveform |
| TJ max. | +150 °C - Enables operation in under-hood automotive and high-ambient industrial environments |
| IFSM | 200 A (8.3 ms) - Withstands high-energy single-event surges without failure |
| Package | SMCG (DO-215AB) - Low-profile surface-mount outline with 0.31" × 0.31" copper pad requirement |
Pinout & Package
SMCG33A-E3/9AT uses the SMCG (DO-215AB) package: a gull-wing surface-mount outline with two terminals, cathode marked by a band. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to ground or low-side reference in unidirectional TVS configuration | Provides return path during clamping; must be routed with low-inductance trace to minimize overshoot |
| Cathode | Protected line connection; marked with band; reverse-biased during normal operation | Connected to signal/power line requiring protection; clamps to anode when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per AEC specification |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| MSL Level 1 rating | Enables direct placement into high-temperature reflow without baking or special handling |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| RoHS-compliant, industrial grade (E3 suffix) | Meets EU RoHS Directive 2011/65/EU and supports extended temperature range (-55 °C to +150 °C) |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges >33 V. Use Value: Limits clamped voltage to ≤53.3 V, safeguarding downstream regulators and microcontrollers rated for 36 V absolute max. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Point-of-entry protection on signal lines referenced to local ground, with low capacitance preserving signal integrity. Use Value: Sub-1 μA leakage at 33 V ensures minimal DC loading; fast response prevents latch-up in precision front-end amplifiers. |
| Telecom DC Power Input | Consumer USB Power Delivery Port |
Use Scenario: Safeguarding 48 V telecom power supplies from lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input bus prior to DC/DC converter stage. Use Value: 1500 W PPPM rating handles IEC 61000-4-5 Combination Wave (10/700 µs) events without degradation. | Use Scenario: Secondary-level surge suppression on 5 V USB VBUS lines exposed to user-handled cables and connectors. IC Role / Device Role / Timing Role: Back-to-back protection element in conjunction with common-mode chokes and ESD diodes. Use Value: AEC-Q101 qualification ensures robustness across repeated plug/unplug cycles and ambient temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | Same VWM (33 V), lower PPPM (400 W), SMA (DO-214AC) package, higher RθJA (110 °C/W) | Limited to lower-energy transients; unsuitable for automotive load dump or telecom surge standards | Select only for cost-sensitive consumer applications with <400 W surge exposure and space-constrained layouts. |
| SMCJ33A-E3/9AT | Same VWM (33 V), higher PPPM (3000 W), larger SMC (DO-214AB) package, same AEC-Q101 qualification | Supports higher-energy threats (e.g., ISO 16750-2) but requires 30% more board area and different pad layout | Choose when system-level testing reveals insufficient margin with SMCG33A-E3/9AT's 1500 W rating. |
Compared with SMAJ33A-E3/57T and SMCJ33A-E3/9AT, the SMCG33A-E3/9AT delivers optimal balance of automotive-grade reliability, 1500 W surge capacity, and compact DO-215AB footprint-enabling robust protection without sacrificing PCB real estate or requiring thermal redesign.
Availability
SMCG33A-E3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power supply designs requiring stable component supply and full AEC-Q101 compliance.
Supply support for SMCG33A-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 SMCG series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where AEC-Q101 qualification and consistent clamping performance are mandatory.
FAQ
What is the clamping voltage of SMCG33A-E3/9AT under standard surge conditions?
The SMCG33A-E3/9AT clamps to a maximum of 53.3 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 28.1 A. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events. The clamping performance remains stable across its operating temperature range of -55 °C to +150 °C.
Is SMCG33A-E3/9AT suitable for automotive applications?
Yes, SMCG33A-E3/9AT is AEC-Q101 qualified and specifically designed for automotive use. It meets requirements for temperature cycling, high-temperature reverse bias, and surge immunity per AEC test plans. Its 1500 W peak pulse power rating supports protection against load dump (ISO 7637-2) and other vehicle-level transients, and the E3 suffix confirms RoHS-compliant industrial-grade construction.
What does the "-E3/9AT" suffix indicate in SMCG33A-E3/9AT?
The "E3" denotes RoHS-compliant, industrial-grade construction with matte tin-plated leads, while "9AT" specifies packaging in a 13-inch diameter plastic tape and reel containing 3500 units. This format enables high-volume automated pick-and-place assembly and complies with J-STD-002 solderability standards. The base part SMCG33A defines the electrical characteristics and DO-215AB package.
How does SMCG33A-E3/9AT compare to bidirectional TVS diodes like SMCG33CA?
SMCG33A-E3/9AT is unidirectional and intended for DC line protection with polarity-sensitive placement (cathode toward protected line). In contrast, SMCG33CA is bidirectional and used for AC or floating signal lines. Both share identical VWM (33 V) and PPPM (1500 W), but SMCG33A-E3/9AT offers lower leakage (<1 μA) and supports higher IFSM (200 A vs. N/A for bidirectional), making it preferred for power rail applications.
What thermal considerations apply when using SMCG33A-E3/9AT in high-power designs?
SMCG33A-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" copper pads per datasheet recommendation. For continuous power dissipation, its 6.5 W rating at TA = 50 °C must be derated above that temperature. Layout must ensure adequate copper area and avoid thermal isolation; junction temperature must not exceed +150 °C under worst-case surge and ambient conditions.
SMCG33A-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG33A-E3/9AT FAQ
1.How can I place an order for SMCG33A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG33A-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 SMCG33A-E3/9AT reliable?
The price and inventory of SMCG33A-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 SMCG33A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG33A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG33A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG33A-E3/9AT?
SMCG33A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG33A-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 SMCG33A-E3/9AT?
For technical support, including SMCG33A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG33A-E3/9AT requirements.
6.How does Aetrix verify that SMCG33A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG33A-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 SMCG33A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG33A-E3/9AT?
All SMCG33A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG33A-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 SMCG33A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCG33A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG33A-E3/9AT 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 …
