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Taiwan Semiconductor Corporation 1.5SMC22AH
- Part No.:
- 1.5SMC22AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22AH.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,997
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Product details
Overview
1.5SMC22AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 20.9–23.1V breakdown voltage at 1mA test current, and 30.6V maximum clamping voltage at 51A peak impulse current. It protects automotive and industrial power rails against ESD, load dump, and ISO 7637-2 pulses.
For engineers reviewing the 1.5SMC22AH datasheet, 1.5SMC22AH pinout, 1.5SMC22AH application, or 1.5SMC22AH equivalent, this device delivers AEC-Q101 qualification, <1ps response time, <1μA leakage above 18.8V working stand-off voltage, and UL 94V-0 mold compound - critical for robust front-end surge immunity in automotive ECUs and telecom interfaces.
Technical Context
The 1.5SMC22AH operates as a unidirectional avalanche clamp, leveraging glass-passivated junction technology to achieve fast sub-nanosecond response and stable breakdown behavior under repetitive transients. Its thermal resistance of 15°C/W (junction-to-case) supports sustained surge handling in high-temperature ambient environments up to +150°C.
Designed per ANSI/IEEE C62.35, it meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms with defined clamping performance at 10/1000μs waveform. The device exhibits a temperature coefficient of VBR of 0.092%/°C, enabling predictable voltage drift across operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W - sustains single 10/1000μs surges up to 51A without failure |
| Breakdown Voltage VBR | 20.9–23.1V @ 1mA - defines precise avalanche initiation threshold for rail protection |
| Working Stand-off Voltage VWM | 18.8V - maximum continuous DC or RMS voltage before significant leakage |
| Maximum Clamping Voltage VC | 30.6V @ 51A - limits downstream IC stress during worst-case transient events |
| Junction Temperature Range | −55°C to +150°C - enables deployment in under-hood automotive and industrial control cabinets |
| Leakage Current IR | <1μA @ 18.8V - ensures minimal standby power loss in always-on systems |
| Response Time | <1.0ps - reacts faster than most microsecond-scale transients, preventing overshoot propagation |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Dimensions comply with JEDEC MS-013AC standard; weight ≈0.210g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms clamping loop with cathode |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24V supply rail); conducts avalanche current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under humidity and thermal stress |
| ISO 7637-2 compliance | Guarantees clamping performance against standardized automotive transient waveforms (Pulse 1/2a/2b/3a/3b) |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly processes |
| UL 94V-0 molding compound | Self-extinguishing encapsulation meets fire-safety requirements for enclosed industrial modules |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protecting 24V CAN bus power rail from load-dump transients during battery disconnect events. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between fused 24V supply and local regulator input. Use Value: Limits voltage to ≤30.6V during 120V/50ms load dump, preventing damage to downstream LDOs and CAN transceivers. |
Use Scenario: Safeguarding 24V optocoupler input circuitry on programmable logic controller digital input cards. IC Role / Device Role / Timing Role: Front-end surge suppressor on field-side wiring terminals exposed to inductive switching noise. Use Value: Clamps 1kV/500A surge (per IEC 61000-4-5) to safe levels within 1ps, preserving signal integrity and isolation barrier integrity. |
| Telecom Base Station Power Interface | EV Onboard Charger (OBC) Auxiliary Supply |
Use Scenario: Immunity enhancement for −48V DC feed lines in outdoor telecom cabinets subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary protection device upstream of DC-DC converters feeding baseband processors. Use Value: Absorbs 1500W transient energy while maintaining VC ≤30.6V, ensuring uninterrupted operation during multi-kA induced surges. |
Use Scenario: Protecting 12V auxiliary supply rail in electric vehicle onboard chargers from battery reversal and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional-capable variant support (via CAH suffix) enables dual-rail protection in compact OBC PCB layouts. Use Value: With AEC-Q101 rating and 150°C TJ, maintains clamping performance in thermally constrained OBC enclosures near power semiconductors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Lower peak power (600W), same DO-214AA package, 22V nominal VBR, higher VC (35.5V @ 17.1A) | Not AEC-Q101 qualified; limited to non-automotive industrial use | Select when cost sensitivity outweighs automotive qualification and 1500W surge margin |
| 1.5KE22A | Through-hole TO-204AE (DO-15) package, 1500W rating, 22V VBR, VC = 33.2V @ 45.2A | Requires PCB real estate and wave soldering; unsuitable for high-density SMT designs | Choose only if legacy through-hole assembly is mandated or thermal mass requirements exceed SMC capability |
Compared with SMBJ22A and 1.5KE22A, the 1.5SMC22AH uniquely combines AEC-Q101 qualification, surface-mount DO-214AB packaging, and full 1500W clamping capability - making it the preferred choice for next-generation automotive and space-constrained industrial power protection where reliability and density are co-prioritized.
Availability
1.5SMC22AH is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, telecom power interfaces, and EV auxiliary supply circuits requiring stable component supply and full AEC-Q101 compliance.
Supply support for 1.5SMC22AH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and automotive-qualified components since 1979.
The 1.5SMC series was developed specifically for high-reliability surface-mount surge protection in automotive and industrial environments, emphasizing AEC-Q101 conformance, ISO 7637-2 compliance, and robust thermal performance in compact SMC packages.
FAQ
What is the polarity configuration of the 1.5SMC22AH?
The 1.5SMC22AH is a unidirectional TVS diode, with cathode marked by a band on the DO-214AB package. It conducts avalanche current only when the cathode is biased positive relative to the anode - ideal for protecting positive supply rails. Bidirectional variants require the "CAH" suffix (e.g., 1.5SMC22CAH), not applicable to the 1.5SMC22AH.
Does the 1.5SMC22AH meet automotive qualification standards?
Yes, the 1.5SMC22AH is AEC-Q101 qualified and tested per the full stress test schedule, including HTGB, HTRB, temperature cycling, and ESD. It also complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b, confirming its suitability for automotive power net protection per OEM requirements.
What is the maximum clamping voltage of the 1.5SMC22AH under surge conditions?
The 1.5SMC22AH has a maximum clamping voltage (VC) of 30.6V at 51A peak impulse current (IPPM) using the 10/1000μs waveform. This value is guaranteed across the full operating temperature range and ensures downstream components see no more than 30.6V during worst-case transient events.
Can the 1.5SMC22AH be used in bidirectional signal line protection?
No - the 1.5SMC22AH is unidirectional only. For bidirectional protection (e.g., RS-485, CAN bus data lines), select the 1.5SMC22CAH variant, which features symmetrical breakdown in both directions and uses the same DO-214AB package but with different internal die construction and marking code.
What is the leakage current specification for the 1.5SMC22AH at its working voltage?
The 1.5SMC22AH specifies a maximum blocking leakage current (IR) of 1μA at its working stand-off voltage (VWM) of 18.8V. This ultra-low leakage ensures negligible power loss in always-on systems such as automotive body controllers and industrial sensor nodes.
1.5SMC22AH 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 51A
- 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)
1.5SMC22AH FAQ
1.How can I place an order for 1.5SMC22AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22AH 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 1.5SMC22AH reliable?
The price and inventory of 1.5SMC22AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC22AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC22AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22AH?
1.5SMC22AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22AH 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 1.5SMC22AH?
For technical support, including 1.5SMC22AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22AH requirements.
6.How does Aetrix verify that 1.5SMC22AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22AH 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 1.5SMC22AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC22AH?
All 1.5SMC22AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22AH, 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 1.5SMC22AH part is unused and in its original packaging.
Return procedure for 1.5SMC22AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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