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Vishay General Semiconductor - Diodes Division SM6T22CA-E3/52
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- Part No.:
- SM6T22CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22CA-E3/52.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,720
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Product details
Overview
SM6T22CA-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 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 30.6 V maximum clamping voltage (VC) at 20 A peak pulse current, 600 W peak pulse power (10/1000 μs), and operates from −65 °C to +150 °C junction temperature - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the SM6T22CA-E3/52 datasheet, SM6T22CA-E3/52 pinout, SM6T22CA-E3/52 application, or SM6T22CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.33), RoHS-compliant matte tin terminations, MSL Level 1 rating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The SM6T22CA-E3/52 implements a glass-passivated silicon junction optimized for fast response (<1 ps typical) to ESD and lightning-induced transients. Its bidirectional architecture enables symmetrical clamping in both polarities without external polarity management, eliminating need for orientation-aware layout.
It delivers 600 W peak pulse power under standardized 10/1000 μs waveform while maintaining low dynamic impedance (≈1.5 Ω derived from ΔVC/ΔIPPM), and achieves thermal resistance of 100 °C/W (junction-to-ambient) when mounted per recommended 0.2" × 0.2" pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise voltage threshold where clamping initiates in either direction |
| VWM | 18.8 V - maximum continuous reverse stand-off voltage before leakage exceeds 1 μA |
| VC @ IPPM | 30.6 V at 20 A (10/1000 μs) - actual clamped voltage seen by protected circuit during surge |
| PPPM | 600 W - peak transient energy absorption capacity without failure under standard waveform |
| TJ range | −65 °C to +150 °C - supports operation in under-hood automotive and industrial ambient environments |
| Package | SMB (DO-214AA) - surface-mount footprint with 2.20 mm height, compatible with IPC-7351B standard land pattern |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; safe for reflow up to 260 °C peak |
Pinout & Package
SMB (DO-214AA) package: molded plastic body with two coplanar matte tin-plated leads; no polarity marking for bidirectional devices; terminals solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No functional distinction - either lead serves as anode or cathode depending on transient polarity; no orientation required during placement |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV surge) on 24 V industrial buses |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers or ADC front-ends |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| MSL Level 1 rating | Eliminates bake-out requirement and allows direct placement into high-volume SMT lines without moisture sensitivity handling |
| AEC-Q101 qualified variant available | HE3 suffix versions support automotive-grade qualification for engine control and ADAS sensor modules |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Suppressing load-dump and ISO 7637-2 pulses on analog sensor outputs (e.g., pressure, temperature) in engine control units. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly across sensor output and ground. Use Value: Limits transient excursions to ≤30.6 V, preventing damage to 3.3 V or 5 V ADC inputs and maintaining signal integrity during cranking events. |
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers from field-wiring induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on each channel between input line and common return. Use Value: Absorbs 600 W surges without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity requirements. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding RS-485 transceiver pins against lightning-induced common-mode transients on outdoor data links. IC Role / Device Role / Timing Role: Differential-line TVS pair (one per line) referenced to local ground plane. Use Value: Symmetrical clamping ensures balanced noise rejection and preserves signal eye diagram integrity up to 10 Mbps. |
Use Scenario: Clamping inductive kickback from brushed DC motor drivers in white goods (e.g., washing machine drum control). IC Role / Device Role / Timing Role: Across motor terminals to suppress >100 V spikes generated during PWM commutation. Use Value: Withstands 100 A non-repetitive forward surge (IFSM), protecting MOSFET half-bridges from avalanche failure during stall conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA | Same VBR range (20.9–23.1 V) but lower PPPM = 400 W; SMA package (smaller thermal mass) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); less margin for repeated surge events | Select when board space is constrained and surge threat level is moderate (e.g., indoor consumer electronics) |
| 1.5KE22CA | Higher PPPM = 1500 W but axial DO-201 package; slower response due to higher parasitic inductance | Not suitable for high-speed data lines; requires through-hole assembly and larger PCB real estate | Choose only for legacy through-hole designs or where extreme energy absorption (>1 kV, 10/1000 μs) is mandatory |
Compared with SMAJ22CA and 1.5KE22CA, the SM6T22CA-E3/52 provides optimal balance of 600 W surge handling, SMB SMT compatibility, and bidirectional symmetry - making it preferred for new automotive and industrial PCB designs requiring automated assembly and compact layout.
Availability
SM6T22CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, RoHS compliance, and MSL Level 1 reflow readiness.
Supply support for SM6T22CA-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The SM6T Series was engineered specifically for robust, surface-mount transient suppression in harsh environments - emphasizing low clamping voltage, repeatable surge endurance, and compatibility with high-speed automated manufacturing.
FAQ
What is the polarity configuration of SM6T22CA-E3/52?
The SM6T22CA-E3/52 is a bidirectional TVS diode with symmetrical anode/cathode terminals - no polarity marking is present on the SMB package, and either lead functions as anode or cathode depending on transient polarity. This eliminates orientation constraints during PCB placement and simplifies layout for differential or AC-coupled lines.
Does SM6T22CA-E3/52 meet automotive qualification standards?
The base SM6T22CA-E3/52 is RoHS-compliant commercial grade. However, the AEC-Q101 qualified version is available as SM6T22CAHE3_B (with HE3 suffix), which undergoes stress testing per AEC-Q101 including HTGB, HTRB, and temperature cycling - required for engine bay and ADAS sensor applications.
What is the maximum clamping voltage of SM6T22CA-E3/52 under surge conditions?
The SM6T22CA-E3/52 has a maximum clamping voltage (VC) of 30.6 V when subjected to a 10/1000 μs waveform at 20 A peak pulse current. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
Can SM6T22CA-E3/52 be used in place of unidirectional TVS diodes like SM6T22A?
No - SM6T22CA-E3/52 is strictly bidirectional and cannot replace unidirectional types such as SM6T22A in DC-biased circuits where forward conduction must be blocked. Using it in place of SM6T22A would allow unintended forward current flow during normal operation, potentially disrupting bias networks or damaging upstream drivers.
What PCB pad layout is recommended for optimal thermal performance of SM6T22CA-E3/52?
Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 600 W pulse power and 100 °C/W thermal resistance. Smaller pads reduce surge capability and increase junction temperature - use the exact dimensions shown in the SMB (DO-214AA) outline drawing (Document 88385, page 4).
SM6T22CA-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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 20A
- 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)
SM6T22CA-E3/52 FAQ
1.How can I place an order for SM6T22CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22CA-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 SM6T22CA-E3/52 reliable?
The price and inventory of SM6T22CA-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 SM6T22CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SM6T22CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22CA-E3/52?
SM6T22CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22CA-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 SM6T22CA-E3/52?
For technical support, including SM6T22CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22CA-E3/52 requirements.
6.How does Aetrix verify that SM6T22CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T22CA-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 SM6T22CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SM6T22CA-E3/52?
All SM6T22CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22CA-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 SM6T22CA-E3/52 part is unused and in its original packaging.
Return procedure for SM6T22CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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