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Vishay General Semiconductor - Diodes Division SM15T22CA-E3/57T
- Part No.:
- SM15T22CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22CA-E3/57T.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:450
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Product details
Overview
SM15T22CA-E3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 22 V standoff voltage (VWM), 30.6 V max clamping voltage at IPPM, and 49.0 A peak pulse current - used to protect automotive sensor signal lines, industrial I/O ports, and telecom interface circuits against lightning-induced and switching transients.
For engineers reviewing the SM15T22CA-E3/57T datasheet, SM15T22CA-E3/57T pinout, SM15T22CA-E3/57T application, or SM15T22CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (1.39), AEC-Q101 qualification eligibility, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T22CA-E3/57T implements a glass-passivated silicon junction optimized for fast response (<1 ps) to transient overvoltages and stable clamping across -65 °C to +150 °C operating range. Its bidirectional architecture enables symmetrical protection of AC-coupled or differential signal paths without polarity constraints.
It delivers 1500 W peak pulse power under standardized 10/1000 μs waveform conditions with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation in high-impedance source environments where peak current remains within 49.0 A rating when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin for protected 24 V nominal systems. |
| VBR min / max | 20.9 V / 23.1 V at IT = 1 mA - verified breakdown threshold ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | 30.6 V at 49.0 A (10/1000 μs) - clamping voltage limits downstream IC stress during surge events; clamping ratio = 1.39. |
| PPPM | 1500 W - peak transient energy absorption capacity suitable for IEC 61000-4-5 Level 4 (4 kV) threat mitigation. |
| IPPM | 49.0 A - maximum non-repetitive surge current supported with proper PCB thermal design (8.0 mm × 8.0 mm pads). |
| TJ range | -65 °C to +150 °C - wide junction temperature range enables deployment in under-hood automotive and industrial ambient environments. |
| Package | SMC (DO-214AB) - surface-mount package with 7.75 mm × 6.22 mm footprint, MSL Level 1, LF peak 260 °C reflow compatible. |
Pinout & Package
SM15T22CA-E3/57T uses a 2-terminal SMC (DO-214AB) package with no polarity marking for bidirectional operation. Terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | Either terminal serves as anode or cathode depending on instantaneous polarity; no band marking required. |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides mechanical anchoring and contributes to thermal dissipation via copper pad contact. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against lightning surges (IEC 61000-4-5) and inductive switching transients without derating in typical PCB layouts. |
| Low clamping voltage (30.6 V @ 49 A) | Minimizes voltage overshoot on protected lines, preserving margin for 3.3 V/5 V/24 V logic and analog front-end components. |
| Glass passivated junction | Ensures long-term reliability and stable electrical parameters under humidity, temperature cycling, and bias stress conditions. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling requirements. |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive applications requiring validated reliability per stress test standards. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/FlexRay/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) in engine control units and body electronics modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt ESD and load-dump transients before reaching signal conditioning ICs. Use Value: Maintains signal integrity during ISO 16750-2 load dump (12 V system: 27 V/100 ms) and ISO 10605 ESD (±30 kV air) events without latch-up or degradation. |
Use Scenario: Safeguarding digital input/output channels on programmable logic controller (PLC) backplanes exposed to motor drive noise and field wiring transients. IC Role / Device Role / Timing Role: Parallel-connected TVS at terminal block interface to limit induced surges from adjacent 24 V DC solenoid switching. Use Value: Prevents false triggering and latch-up in optocoupler-isolated inputs by clamping transients to ≤30.6 V while sustaining 49 A peak current. |
| Telecom Line Interface Protection | Consumer Power Adapter EMI Filtering |
Use Scenario: Shielding Ethernet PHYs, RS-485 transceivers, and DSL line drivers from induced surges on outdoor or long-cable runs. IC Role / Device Role / Timing Role: First-stage protection device upstream of common-mode chokes and secondary TVS arrays in multi-stage telecom surge designs. Use Value: Absorbs up to 1500 W of transient energy per event, reducing stress on downstream GDTs and polymer PTCs in IEC 61000-4-5 compliant interfaces. |
Use Scenario: Suppressing fast-rising switching noise and accidental AC line surges on secondary-side 5 V/12 V rails in USB-C PD adapters and smart home power supplies. IC Role / Device Role / Timing Role: Low-inductance bidirectional clamp across output capacitor terminals to prevent overvoltage damage to USB PD controllers and load switches. Use Value: Limits output rail excursions to ≤30.6 V during 10/1000 μs transients, avoiding brownout resets and MOSFET avalanche failure in compact form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ22CA | Same SMC package, 22 V VWM, but lower PPPM = 400 W and higher VC = 35.5 V at 11.3 A; RθJA = 85 °C/W. | Suitable only for lower-energy threats (IEC 61000-4-2 ESD, not Level 4 surges); requires larger copper area for thermal management. | Select SMAJ22CA only when cost sensitivity outweighs surge robustness and board space allows additional thermal relief. |
| ON Semiconductor 1.5KE22CA | Through-hole DO-201 package, same 22 V VWM, PPPM = 1500 W, but VC = 33.2 V at 45.2 A; not SMT-compatible. | Requires wave soldering or hand assembly; incompatible with high-density SMT layouts and automated manufacturing. | Choose 1.5KE22CA only for legacy through-hole designs or prototyping where rework tolerance is prioritized over production efficiency. |
Compared with SMAJ22CA and 1.5KE22CA, SM15T22CA-E3/57T delivers superior clamping performance (30.6 V vs. ≥33.2 V), lower thermal resistance, and full SMT process compatibility - making it optimal for automotive-grade, high-reliability, and space-constrained applications demanding repeatable 1500 W surge handling.
Availability
SM15T22CA-E3/57T 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 traceable sourcing.
Supply support for SM15T22CA-E3/57T 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, TVS devices, and power MOSFETs with emphasis on reliability, precision, and application-specific optimization.
The SM15T Series was developed specifically for high-power, surface-mount transient suppression in automotive, industrial, and telecom infrastructure - balancing clamping performance, thermal robustness, and automated assembly readiness.
FAQ
What is the clamping voltage of SM15T22CA-E3/57T at its rated peak pulse current?
The SM15T22CA-E3/57T has a maximum clamping voltage (VC) of 30.6 V when subjected to its rated peak pulse current of 49.0 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and reflects worst-case device behavior at TA = 25 °C with recommended 8.0 mm × 8.0 mm copper pads. The SM15T22CA-E3/57T maintains this clamping performance across its full operating temperature range.
Is SM15T22CA-E3/57T suitable for automotive applications?
Yes - while the base SM15T22CA-E3/57T is commercial-grade, the same die is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes (e.g., SM15T22CAHE3_A/H). The SM15T22CA-E3/57T shares identical electrical characteristics, SMC package, and thermal performance, enabling direct qualification path for automotive use with appropriate variant ordering. Its -65 °C to +150 °C TJ range supports under-hood deployment.
Does SM15T22CA-E3/57T require polarity-aware PCB layout?
No - SM15T22CA-E3/57T is a bidirectional TVS diode with symmetrical I-V characteristics in both directions, so it has no anode/cathode orientation requirement. The device carries no polarity marking on its SMC (DO-214AB) body, and either terminal may be connected to either side of the protected line. This simplifies layout and eliminates risk of reverse installation during automated placement.
What is the thermal resistance of SM15T22CA-E3/57T, and how does it affect PCB design?
The SM15T22CA-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To sustain repeated 1500 W pulses, PCB layout must replicate this pad area and ensure adequate copper thickness (≥2 oz) and thermal vias - undersized pads will cause premature thermal runaway and failure of the SM15T22CA-E3/57T.
How does SM15T22CA-E3/57T compare to unidirectional variants like SM15T22A-E3/57T?
The SM15T22CA-E3/57T differs from SM15T22A-E3/57T solely in polarity: "CA" denotes bidirectional operation with symmetrical clamping, while "A" indicates unidirectional with cathode band marking. Both share identical VWM (22 V), VBR (20.9–23.1 V), VC (30.6 V), and PPPM (1500 W). Use SM15T22CA-E3/57T for AC, differential, or polarity-agnostic protection; use SM15T22A-E3/57T only where DC bias direction is fixed and reverse leakage must be minimized.
SM15T22CA-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, 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):
- 49A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SM15T22CA-E3/57T FAQ
1.How can I place an order for SM15T22CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22CA-E3/57T 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 SM15T22CA-E3/57T reliable?
The price and inventory of SM15T22CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T22CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T22CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22CA-E3/57T?
SM15T22CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22CA-E3/57T 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 SM15T22CA-E3/57T?
For technical support, including SM15T22CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22CA-E3/57T requirements.
6.How does Aetrix verify that SM15T22CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T22CA-E3/57T 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 SM15T22CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T22CA-E3/57T?
All SM15T22CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22CA-E3/57T, 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 SM15T22CA-E3/57T part is unused and in its original packaging.
Return procedure for SM15T22CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T22CA-E3/57T Tags
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