My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMCG30A-M3/9AT
- Part No.:
- SMCG30A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG30A-M3/9AT.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,086
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMCG30A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMCG (DO-215AB) package, with a 30 V standoff voltage (VWM), 33.3–36.8 V breakdown voltage (VBR), 48.4 V clamping voltage (VC) at 31.0 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM). It is AEC-Q101 qualified and halogen-free, designed for automotive-level transient protection on power rails and signal lines.
For engineers reviewing the SMCG30A-M3/9AT datasheet, SMCG30A-M3/9AT pinout, SMCG30A-M3/9AT application, or SMCG30A-M3/9AT equivalent, this device serves as a high-reliability, low-clamping TVS for 12 V/24 V automotive subsystems, industrial I/O interfaces, and DC power input stages where surge immunity per ISO 7637-2 and IEC 61000-4-5 is required.
Technical Context
The SMCG30A-M3/9AT operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its clamping behavior is defined under standardized 10/1000 µs waveform testing, with thermal performance governed by RθJA = 75 °C/W and RθJL = 15 °C/W.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it meets J-STD-020 MSL Level 1 (peak reflow ≤ 260 °C) and supports automated placement. Polarity is marked by a cathode band; no marking is used for bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; sets usable range for 12 V/24 V DC systems. |
| VBR (min/max) | 33.3 V / 36.8 V - Breakdown initiates within this range at 1 mA test current; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 48.4 V - Clamped voltage at 31.0 A peak pulse current; limits downstream stress during 10/1000 µs transients. |
| PPPM | 1500 W - Peak pulse power handling capability under standard 10/1000 µs waveform; enables robust surge immunity. |
| ID @ VWM | 1.0 µA - Reverse leakage at rated standoff voltage; negligible power loss and minimal impact on high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive environments. |
| Package | SMCG (DO-215AB) - Low-profile, gull-wing SMD package with matte tin-plated leads; compatible with standard reflow profiles. |
Pinout & Package
SMCG30A-M3/9AT uses the SMCG (DO-215AB) surface-mount package: gull-wing leads, 0.220–0.245 inch body length, 0.115–0.125 inch width, and 0.024–0.040 inch lead span. Cathode is marked by a visible band on the case end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side return path | Completes conduction path during transient clamp; must be routed with low-inductance grounding to minimize overshoot. |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., 12 V rail or signal trace) | Marked by band; defines polarity-sensitive placement-reversal prevents clamping and risks device failure. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for engine control, body electronics, and ADAS modules. |
| Glass-passivated junction | Enhances long-term stability and moisture resistance; eliminates risk of junction corrosion in humid or condensing environments. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and EU Directive 2011/65/EU; supports green manufacturing and end-of-life compliance. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients; improves clamping precision compared to higher-Rsurge TVS devices. |
| MSL Level 1 rating | Enables single-pass reflow without pre-baking; reduces production complexity and avoids moisture-induced popcorning. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping surges before they reach LDOs, microcontrollers, or CAN transceivers. Use Value: Limits clamped voltage to 48.4 V at 31 A, preventing damage to 36 V-rated input stages while maintaining < 1 µA leakage at nominal 12 V operation. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules exposed to relay switching noise. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point, shunting inductive kickback from solenoid drivers on shared 24 V supply lines. Use Value: Sub-ns response ensures clamping occurs before sensitive op-amps or ADC inputs experience overvoltage; 1500 W rating handles repetitive 100 A surge events. |
| DC Power Input Stage Protection | Telecom Line Card Surge Suppression |
Use Scenario: Front-end protection for 48 V telecom rectifiers or PoE-powered equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary TVS in series with fuse and common-mode choke, absorbing differential-mode energy before secondary filtering. Use Value: 30 V VWM allows use with 36–42 V nominal supplies; 48.4 V VC ensures downstream DC/DC converters remain within absolute maximum ratings during IEC 61000-4-5 2 kV tests. | Use Scenario: Secondary-level protection on Ethernet PHY power rails (e.g., +3.3 V, +5 V) in enterprise switches facing ESD and fast transient bursts. IC Role / Device Role / Timing Role: Localized TVS adjacent to PHY IC pins, providing low-inductance path to chassis ground for ESD currents. Use Value: 1.0 µA ID at VWM preserves signal integrity on high-impedance bias networks; DO-215AB footprint enables dense layout without compromising creepage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/57T | Same VWM (30 V), lower PPPM (400 W), SMA (DO-214AC) package, non-AEC-Q101, RoHS-compliant but not halogen-free | Lower surge capacity; suited for cost-sensitive consumer or industrial designs without automotive qualification needs | Select when AEC-Q101 and 1500 W rating are not required; verify PCB pad layout compatibility with SMA footprint |
| SMCJ30A-QH | Same VWM (30 V), identical PPPM (1500 W), SMC (DO-214AB) package, AEC-Q101 qualified, halogen-free | Larger package (7.11 mm × 6.22 mm vs. SMCG's 7.11 mm × 5.59 mm); higher RθJA (85 °C/W vs. 75 °C/W) | Choose if existing SMC footprint is preferred; accept slightly reduced thermal efficiency and larger board area |
Compared with SMAJ30A-E3/57T and SMCJ30A-QH, SMCG30A-M3/9AT delivers identical surge rating and automotive qualification in a smaller, thermally optimized DO-215AB package-ideal for space-constrained, high-reliability 12 V/24 V systems requiring minimal footprint and superior thermal resistance.
Availability
SMCG30A-M3/9AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power supply modules requiring stable component supply across extended production lifecycles.
Supply support for SMCG30A-M3/9AT 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 TVS devices with emphasis on reliability, ruggedness, and application-specific validation.
The SMCG series was developed to deliver high-power transient suppression in compact, automotive-qualified surface-mount packages-targeting next-generation vehicle electrification, ADAS, and industrial IoT edge nodes demanding AEC-Q101 compliance and low-profile integration.
FAQ
What is the clamping voltage of SMCG30A-M3/9AT at its rated peak pulse current?
The SMCG30A-M3/9AT has a maximum clamping voltage (VC) of 48.4 V at 31.0 A peak pulse current (IPPM), measured under the standard 10/1000 µs waveform. This value ensures protected circuits remain within safe voltage limits during surge events. The SMCG30A-M3/9AT achieves this clamping performance while maintaining low leakage and high reliability in automotive and industrial environments.
Is SMCG30A-M3/9AT suitable for automotive applications?
Yes, SMCG30A-M3/9AT is AEC-Q101 qualified and halogen-free (M3 suffix), making it suitable for automotive powertrain, body electronics, and infotainment systems. It meets stringent requirements for temperature cycling, humidity resistance, and surge immunity. The SMCG30A-M3/9AT is specifically validated for use in 12 V and 24 V vehicle subsystems subject to ISO 7637-2 and ISO 16750-2 stress conditions.
What does the "M3" suffix indicate in SMCG30A-M3/9AT?
The "M3" suffix denotes halogen-free, RoHS-compliant construction meeting IPC-1752A material declaration standards, with matte tin-plated leads qualified per JESD 201 Class 2 whisker testing. It also confirms industrial-grade qualification. The SMCG30A-M3/9AT shares all electrical and thermal specifications with non-M3 variants but adds environmental compliance for green manufacturing and export-regulated markets.
How does SMCG30A-M3/9AT compare to SMAJ30A in terms of surge capability?
SMCG30A-M3/9AT delivers 1500 W peak pulse power (PPPM) versus SMAJ30A's 400 W, enabling threefold higher transient energy absorption. Both share 30 V VWM, but SMCG30A-M3/9AT achieves this in a smaller DO-215AB package with better thermal resistance (RθJA = 75 °C/W vs. ~100 °C/W for SMAJ). The SMCG30A-M3/9AT is also AEC-Q101 qualified, unlike standard SMAJ30A.
What is the recommended PCB pad layout for SMCG30A-M3/9AT?
Vishay specifies mounting SMCG30A-M3/9AT on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated thermal and surge performance. Pad dimensions must match DO-215AB gull-wing lead spacing (0.038–0.058 inch pitch). Thermal vias under pads improve heat dissipation. The SMCG30A-M3/9AT datasheet provides exact mechanical drawings and land pattern recommendations to ensure optimal clamping response and reliability.
SMCG30A-M3/9AT 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG30A-M3/9AT FAQ
1.How can I place an order for SMCG30A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG30A-M3/9AT 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 SMCG30A-M3/9AT reliable?
The price and inventory of SMCG30A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG30A-M3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG30A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG30A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG30A-M3/9AT?
SMCG30A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG30A-M3/9AT 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 SMCG30A-M3/9AT?
For technical support, including SMCG30A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG30A-M3/9AT requirements.
6.How does Aetrix verify that SMCG30A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG30A-M3/9AT 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 SMCG30A-M3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG30A-M3/9AT?
All SMCG30A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG30A-M3/9AT, 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 SMCG30A-M3/9AT part is unused and in its original packaging.
Return procedure for SMCG30A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG30A-M3/9AT 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 …
