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Taiwan Semiconductor Corporation 1.5SMC22CH
- Part No.:
- 1.5SMC22CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22CH.pdf
- Description:
- 1500W, 22V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,609
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Product details
Overview
1.5SMC22CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 22V breakdown voltage (19.8–24.2V), and clamping voltage of 31.9V at 49A peak impulse current. It protects automotive and industrial electronics against ESD, lightning surges, and load-switch transients per ISO 7637-2 Pulse 1/2a/2b/3a/3b.
For engineers reviewing the 1.5SMC22CH datasheet, 1.5SMC22CH pinout, 1.5SMC22CH application, or 1.5SMC22CH equivalent, this AEC-Q101 qualified TVS offers verified bidirectional clamping, <1.0ps response time, <1μA leakage above 17.8V, and UL 94V-0 molded case - critical for robust front-end protection in CAN/LIN bus nodes, power supply inputs, and sensor interfaces.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with breakdown voltage specified at 1mA test current and clamping defined at 49A (10/1000μs waveform). Its glass-passivated junction ensures stable VBR temperature coefficient (0.092%/°C) and low leakage (<1μA @ 17.8V).
Thermal performance is characterized by RθJA = 50°C/W and RθJC = 15°C/W, supporting reliable operation up to TJ = +150°C. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - enabling high-yield reflow assembly without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 19.8V / 24.2V @ IT = 1mA - defines guaranteed conduction onset range under standardized test conditions |
| VWM | 17.8V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 31.9V @ 49A (10/1000μs) - peak clamped voltage seen by protected circuit during worst-case surge |
| PPK | 1500W - peak pulse power handling capability per single non-repetitive transient event |
| IR @ VWM | <1μA - ultra-low leakage ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150°C - maximum junction temperature enabling use in under-hood automotive and industrial environments |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 7.11mm x 6.22mm footprint and matte tin-plated leads |
Pinout & Package
DO-214AB (SMC) package: molded epoxy case with cathode band marking (bidirectional symmetry means no polarity orientation required; cathode band denotes terminal identification only for unidirectional variants - not functional in 1.5SMC22CH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Both terminals function identically as clamping nodes - no DC polarity dependency; connects across protected line-to-line or line-to-ground |
| Case (exposed metal pad) | Thermal conduction path | Not electrically connected; serves as heatsink interface - requires thermal pad on PCB for optimal RθJA performance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, body electronics, and ADAS modules |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without degradation |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments |
| Fast response time | <1.0ps - limits voltage overshoot during nanosecond-scale ESD events (IEC 61000-4-2) before downstream ICs are damaged |
| Moisture sensitivity Level 1 | Zero bake requirement prior to reflow - supports direct placement into high-volume SMT lines without floor-life constraints |
Applications
| Automotive LIN Bus Interface | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protection of LIN transceiver pins against battery dump, load switching, and ESD in vehicle door modules and seat controls. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between LIN bus line and ground, absorbing transients while maintaining signal integrity at 19.2 kbps. Use Value: Clamps to ≤31.9V during 49A surge, preventing LIN PHY damage while preserving common-mode range and slew rate compliance. |
Use Scenario: Front-end surge suppression for 24V digital input channels in programmable logic controllers exposed to relay coil kickback and field wiring noise. IC Role / Device Role / Timing Role: Line-to-ground TVS on each isolated input channel, coordinated with optocoupler input stage to limit voltage stress. Use Value: Withstands repetitive 1500W pulses per ISO 7637-2 Pulse 1, extending optocoupler lifetime and reducing false triggering in noisy factory environments. |
| DC Power Supply Input (12–24V) | RS-485 Transceiver Port |
Use Scenario: Primary overvoltage protection on main DC input rail of embedded controllers powered from vehicle battery or industrial SMPS. IC Role / Device Role / Timing Role: First-stage transient absorber upstream of input filter and DC-DC converter, shunting energy before it reaches bulk capacitance. Use Value: Limits input rail excursion to 31.9V during 10/1000μs surges, preventing MOSFET gate oxide rupture and capacitor overvoltage failure. |
Use Scenario: Differential-line protection for RS-485 transceivers in building automation networks subject to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Bidirectional TVS across A/B differential pair and to ground, providing symmetrical clamping without distorting differential signaling. Use Value: Maintains <100ps skew between A/B clamping paths, preserving signal integrity at up to 10 Mbps while meeting IEC 61000-4-5 Level 3 (1kV/2Ω) |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA (Bourns) | Same DO-214AA (SMB) package; lower PPK = 600W; VC = 35.5V @ 17A; higher RθJA = 65°C/W | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 (1500W requirement) | Select only if system-level surge testing confirms ≤600W threat level and thermal margin allows higher junction temp rise |
| SMCJ22CA (Littelfuse) | Same DO-214AB (SMC) package; identical PPK = 1500W; VC = 33.2V @ 45.3A; AEC-Q101 qualified but different VBR tolerance (5% vs. 1.5SMC22CH's 10%) | Compatible with same PCB layout; slightly higher clamping may impact margin for 3.3V/5V logic interfaces | Drop-in replacement where tighter VBR tolerance is not required; verify clamping margin against protected IC absolute maximum ratings |
Compared with SMBJ22CA and SMCJ22CA, the 1.5SMC22CH delivers optimal balance of high-power handling, low clamping voltage, and automotive-grade reliability in the standard SMC footprint - making it preferred for ISO 7637-2-compliant designs where board space and thermal performance are constrained.
Availability
1.5SMC22CH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLCs, and DC power distribution units requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for 1.5SMC22CH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global ISO/TS 16949 and AEC-Q200 certified production lines.
The 1.5SMCxxCH series was designed specifically for automotive and industrial transient suppression - emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and high-volume SMT manufacturability in the DO-214AB package.
FAQ
What does the "CH" suffix indicate in 1.5SMC22CH?
The "CH" suffix in 1.5SMC22CH designates a bidirectional configuration with symmetrical clamping characteristics in both polarities. Unlike unidirectional "H" variants, the CH version has no anode/cathode distinction and is marked without a polarity band - enabling flexible placement across differential lines or line-to-ground paths without orientation concerns. This makes 1.5SMC22CH ideal for protecting balanced interfaces like RS-485 or LIN bus.
How does 1.5SMC22CH meet ISO 7637-2 requirements?
1.5SMC22CH is explicitly tested and rated to withstand all five ISO 7637-2 transient pulses: Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling). Its 1500W peak power rating, 31.9V clamping voltage at 49A, and fast <1.0ps response ensure voltage excursions remain within safe limits for protected ICs during these standardized automotive surge events - confirmed in Taiwan Semiconductor's qualification report B2207.
Is 1.5SMC22CH compatible with lead-free reflow processes?
Yes, 1.5SMC22CH is fully compatible with lead-free reflow soldering per J-STD-020 Level 1 moisture sensitivity and JEDEC J-STD-002B solderability standards. Its matte tin-plated leads achieve >95% wetting coverage on OSP and ENIG PCB finishes, and the UL 94V-0 epoxy compound withstands peak temperatures up to 260°C for 10 seconds without delamination or parametric shift - validated in TSC's process compatibility documentation.
What is the maximum steady-state power dissipation for 1.5SMC22CH?
The maximum steady-state power dissipation (PD) for 1.5SMC22CH is 6.5W at TA = 25°C, derating linearly above that ambient temperature per the published thermal curve. This value reflects continuous DC or low-frequency leakage power handling - distinct from its 1500W peak pulse rating. Designers must ensure PCB copper area and airflow maintain junction temperature ≤150°C under worst-case static bias conditions.
Does 1.5SMC22CH require a heatsink for typical automotive applications?
No external heatsink is required for 1.5SMC22CH in typical automotive applications, provided the PCB includes a minimum 100 mm² copper pour connected to both terminals per TSC's recommended pad layout. With RθJA = 50°C/W and RθJC = 15°C/W, this layout sustains full 1500W pulse capability at TA ≤ 85°C. For sustained high-temperature environments (>105°C ambient), additional thermal vias to inner ground planes are recommended to maintain 1.5SMC22CH junction safety margin.
1.5SMC22CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17.8V
- Voltage - Breakdown (Min):
- 19.8V
- Voltage - Clamping (Max) @ Ipp:
- 31.9V
- Current - Peak Pulse (10/1000µs):
- 49A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC22CH FAQ
1.How can I place an order for 1.5SMC22CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22CH 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 1.5SMC22CH reliable?
The price and inventory of 1.5SMC22CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC22CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC22CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22CH?
1.5SMC22CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22CH 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 1.5SMC22CH?
For technical support, including 1.5SMC22CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22CH requirements.
6.How does Aetrix verify that 1.5SMC22CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22CH 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 1.5SMC22CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC22CH?
All 1.5SMC22CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22CH, 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 1.5SMC22CH part is unused and in its original packaging.
Return procedure for 1.5SMC22CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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