My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM6T30CA-E3/52
;;2.jpg)
- Part No.:
- SM6T30CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T30CA-E3/52.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,826
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM6T30CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 30 V standoff voltage (VWM), 33.2 V minimum breakdown voltage (VBR), 600 W peak pulse power (10/1000 μs), and clamps to ≤49.9 V at 12.0 A IPPM - used in automotive sensor protection, industrial I/O interfaces, and telecom line surge suppression.
For engineers reviewing the SM6T30CA-E3/52 datasheet, SM6T30CA-E3/52 pinout, SM6T30CA-E3/52 application, or SM6T30CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification eligibility (via HE3 suffix variants), SMB thermal resistance (RθJA = 100 °C/W), and compliance with IEC 61000-4-2/4-4/4-5 surge immunity standards.
Technical Context
The SM6T30CA-E3/52 operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity marking. Its glass-passivated junction ensures stable breakdown behavior under repetitive surge stress, and low-inductance SMB package supports fast response (<1 ns) to ESD and lightning-induced surges.
Rated for -65 °C to +150 °C junction temperature, it delivers 600 W peak pulse power per 10/1000 μs waveform when mounted on 5.0 mm × 5.0 mm copper pads. Thermal resistance (RθJL = 20 °C/W) enables effective heat transfer to PCB traces, supporting sustained operation at 5.0 W steady-state dissipation at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min) | 33.2 V - guaranteed avalanche initiation voltage at 1.0 mA test current |
| VC @ IPPM | 49.9 V - clamped voltage at 12.0 A peak pulse current (10/1000 μs) |
| PPPM | 600 W - peak transient power handling capability per standard waveform |
| TJ max. | +150 °C - maximum junction temperature enabling automotive under-hood use |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, defining derating above 25 °C |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; cathode/anode terminals are functionally symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts during negative voltage excursions; tied to protected line or ground reference |
| Cathode | Transient current entry (positive half-cycle) | Conducts during positive voltage excursions; tied to same node as Anode in bidirectional configuration |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 600 W peak pulse rating | Withstands IEC 61000-4-5 Level 3 (1 kV, 2 Ω source) surges on 50 Ω lines |
| Low clamping ratio (VC/VBR ≈ 1.5) | Minimizes overvoltage stress on downstream ICs compared to competing TVS devices |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground to limit excursion to <50 V. Use Value: Prevents latch-up or permanent damage to microcontrollers and analog front-ends during ISO 7637-2 Pulse 1/2a/5a events. | Use Scenario: Safeguarding differential data lines in factory automation PLCs against EFT bursts and surge coupling from adjacent motor drives. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS pair (two SM6T30CA-E3/52) on RS-485 transceiver inputs/outputs. Use Value: Maintains signal integrity up to 10 Mbps while meeting IEC 61000-4-4 (4 kV EFT) and IEC 61000-4-5 (1 kV surge) immunity requirements. |
| Telecom DSL Line Protection | Consumer USB Port ESD Suppression |
Use Scenario: Shielding ADSL/VDSL line drivers and receivers from lightning-induced longitudinal surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary protection device across tip/ring pair, coordinated with secondary GDT or polymer PTC. Use Value: Clamps common-mode surges to <50 V within 1 ns, preserving xDSL chipset reliability without affecting DC bias or AC signal fidelity. | Use Scenario: Adding robust ±15 kV contact / ±20 kV air-gap ESD protection to upstream-facing USB 2.0 data lines in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Bidirectional TVS placed between D+ and D− lines, referenced to local ground plane. Use Value: Absorbs IEC 61000-4-2 ESD pulses without forward conduction, avoiding data corruption or enumeration failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA | Same SMB package, identical VWM/VBR/VC specs; higher RθJA (110 °C/W vs. 100 °C/W) | Marginally lower thermal performance in high-density layouts; otherwise drop-in functional replacement | Select SMBJ30CA only if legacy design validation exists; SM6T30CA-E3/52 offers better thermal margin. |
| P6SMB30CA | Same electrical specs but in larger SMB (DO-214AA) variant with different lead finish (matte tin vs. solderable per J-STD-002) | Identical mounting footprint but requires verification of lead coplanarity and reflow profile compatibility | Prefer SM6T30CA-E3/52 for new designs due to documented JESD 22-B102 solderability and whisker resistance. |
Compared with SMBJ30CA and P6SMB30CA, the SM6T30CA-E3/52 provides superior thermal resistance (100 °C/W), verified JESD 201 Class 2 whisker resistance, and tighter manufacturing control for automotive-grade variants - making it optimal for space-constrained, high-reliability industrial and automotive applications.
Availability
SM6T30CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 interface hardening, and telecom DSL line surge suppression requiring stable component supply and long-term BOM continuity.
Supply support for SM6T30CA-E3/52 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 optimization.
The SM6T Series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where high-energy surge immunity and AEC-Q101 qualification readiness are critical.
FAQ
What is the clamping voltage of SM6T30CA-E3/52 at its rated peak pulse current?
The SM6T30CA-E3/52 clamps to a maximum of 49.9 V at 12.0 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured with the device mounted on 0.2" × 0.2" copper pads per JEDEC guidelines and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM6T30CA-E3/52 suitable for automotive applications?
Yes, SM6T30CA-E3/52 is RoHS-compliant and compatible with AEC-Q101 qualified variants (e.g., SM6T30CAHE3_B/H). While the E3/52 suffix itself denotes commercial grade, its construction - including glass-passivated junction, MSL Level 1 rating, and -65 °C to +150 °C operating range - meets foundational requirements for automotive subsystems such as body control modules and sensor interfaces.
How does the bidirectional configuration of SM6T30CA-E3/52 affect PCB layout?
The SM6T30CA-E3/52 has no polarity marking and functions identically in either orientation, simplifying PCB layout by eliminating cathode/anode routing constraints. Engineers may place it across differential lines (e.g., RS-485 A/B) or between signal and ground without directional verification - reducing assembly errors and enabling compact, symmetric protection schemes.
What is the maximum steady-state power dissipation of SM6T30CA-E3/52?
The SM6T30CA-E3/52 has a maximum steady-state power dissipation (PD) of 5.0 W when operated at TA = 50 °C on an infinite heatsink. At ambient temperatures above 50 °C, linear derating applies per Figure 2 in the datasheet, reaching zero dissipation at approximately 150 °C ambient due to its 100 °C/W thermal resistance.
Does SM6T30CA-E3/52 meet IEC 61000-4-2 ESD immunity requirements?
Yes, SM6T30CA-E3/52 is rated for ±30 kV air discharge and ±30 kV contact discharge per IEC 61000-4-2, validated by its 600 W peak pulse power rating and sub-nanosecond response time. When correctly placed near connectors with low-inductance grounding, it reliably prevents ESD-induced latch-up or damage in microcontroller-based systems.
SM6T30CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 14.5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T30CA-E3/52 FAQ
1.How can I place an order for SM6T30CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T30CA-E3/52 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 SM6T30CA-E3/52 reliable?
The price and inventory of SM6T30CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T30CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SM6T30CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T30CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T30CA-E3/52?
SM6T30CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T30CA-E3/52 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 SM6T30CA-E3/52?
For technical support, including SM6T30CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T30CA-E3/52 requirements.
6.How does Aetrix verify that SM6T30CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T30CA-E3/52 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 SM6T30CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SM6T30CA-E3/52?
All SM6T30CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T30CA-E3/52, 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 SM6T30CA-E3/52 part is unused and in its original packaging.
Return procedure for SM6T30CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T30CA-E3/52 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 …
