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Taiwan Semiconductor Corporation 1.5SMC20CH
- Part No.:
- 1.5SMC20CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20CH.pdf
- Description:
- 1500W, 20V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,757
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Product details
Overview
1.5SMC20CH from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a 20V working stand-off voltage (VWM = 16.2 V), 22V minimum breakdown voltage (VBR min = 18.0 V), and 29.1V maximum clamping voltage (VC @ IPPM). It features DO-214AB (SMC) packaging, AEC-Q101 qualification, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and ESD protection in power-line interfaces.
For engineers reviewing the 1.5SMC20CH datasheet, 1.5SMC20CH pinout, 1.5SMC20CH application, or 1.5SMC20CH equivalent, this device is selected for robust overvoltage immunity in 24V automotive subsystems, industrial I/O ports, and DC power rails where fast response (<1.0 ps), low leakage (<1 µA @ 16.2 V), and high surge current handling (IPPM = 54 A) are critical design requirements.
Technical Context
The 1.5SMC20CH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 18.0–22.0 V breakdown range at 1 mA test current. Its glass-passivated junction ensures stable clamping performance under repetitive transients, while thermal resistance values (RθJA = 50 °C/W, RθJC = 15 °C/W) support reliable operation up to TJ = 150 °C.
Designed for compliance with ISO 7637-2, it withstands standardized automotive transients including load dump (Pulse 5), coupled surges (Pulse 1/2a/2b), and supply line noise (Pulse 3a/3b), with clamping limited to ≤29.1 V at 54 A peak impulse current under 10/1000 µs waveform conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16.2 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min / max | 18.0 V / 22.0 V @ 1 mA - Ensures predictable turn-on threshold across temperature and unit variation |
| VC @ IPPM | 29.1 V @ 54 A - Limits downstream voltage during worst-case 10/1000 µs surge, protecting 30 V-rated ICs |
| PPK | 1500 W - Peak pulse power rating defines transient energy absorption capability per IEC 61000-4-5 |
| IR @ VWM | <1 µA - Negligible leakage ensures minimal standby power loss in always-on circuits |
| TJ max | +150 °C - Enables use in under-hood automotive environments without derating below 125 °C ambient |
| Package | DO-214AB (SMC) - Standardized SMT footprint compatible with automated placement and reflow profiles |
Pinout & Package
DO-214AB (SMC) package: surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band; weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / low-side reference | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Transient voltage sensing node | Connected to protected line (e.g., 24V supply); 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 per stress requirements |
| Clamping ratio VC/VBR | ≤1.62 - Low ratio ensures tight voltage control during surge, reducing margin needed for downstream components |
| Response time | <1.0 ps - Sub-picosecond switching enables suppression of fast ESD events before IC damage occurs |
| Moisture sensitivity | Level 1 per J-STD-020 - No dry-pack or bake-out required prior to assembly, simplifying manufacturing flow |
| ISO 7637-2 compliance | Pulse 1/2a/2b/3a/3b - Certified for full suite of automotive electrical disturbance immunity tests |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protecting LIN bus and switched 12/24V sensor inputs against load dump and inductive kickback in vehicle body electronics. IC Role / Device Role: Unidirectional TVS placed between input line and chassis ground to shunt surge energy away from MCU GPIO and level translators. Use Value: Clamps 54 A transients to ≤29.1 V, ensuring connected 3.3V/5V logic remains within absolute maximum ratings during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding 24V DC digital input channels on programmable logic controller modules exposed to field wiring surges. IC Role / Device Role: Primary overvoltage clamp on each isolated input channel, positioned upstream of optocoupler or Schmitt trigger interface. Use Value: Withstands repeated 10/1000 µs surges up to 1500 W without degradation, extending field service life in factory automation environments. |
| Telecom Power Supply Front-End | Medical Equipment DC Power Rail |
Use Scenario: Secondary surge protection on +24V/-48V telecom power distribution boards adjacent to DC-DC converters. IC Role / Device Role: Fast-response TVS parallel to bulk capacitance to suppress high-frequency ringing and ESD-induced spikes. Use Value: Sub-1 ps response captures edge-transient energy missed by slower MOVs or polymer-based protectors, preserving converter stability. | Use Scenario: Overvoltage guard on internal 24V auxiliary power rail feeding motor drivers and display controllers in diagnostic imaging systems. IC Role / Device Role: Fail-safe clamping element certified to AEC-Q101 and RoHS/halogen-free standards for safety-critical subsystems. Use Value: Meets stringent leakage requirement (<1 µA) to avoid interference with low-current analog signal paths sharing the same supply domain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | 600W rating, SMB package (smaller footprint), lower IPPM (32.4 A), higher VC (32.4 V) | Lower power handling limits use to lighter-duty 24V I/O; not suitable for ISO 7637-2 Pulse 5 | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 only |
| 1.5KE20A | Through-hole TO-204AA (DO-41), same 1500W rating but slower thermal response and no AEC-Q101 qualification | Not suitable for automated SMT lines or automotive under-hood deployment due to package and qualification gap | Choose only for legacy through-hole designs where rework tolerance and manual assembly are acceptable |
Compared with SMBJ20A and 1.5KE20A, the 1.5SMC20CH delivers superior automotive-grade reliability via AEC-Q101 qualification, higher surge current capacity (54 A vs. 32.4 A), tighter clamping (29.1 V vs. 32.4 V), and SMT compatibility-making it the preferred choice for new 24V automotive and industrial designs requiring validated transient immunity.
Availability
1.5SMC20CH is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and telecom power front-end designs requiring stable component supply and long-term lifecycle assurance.
Supply support for 1.5SMC20CH 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, rectifiers, and MOSFETs with global distribution and AEC-Q101 validation capabilities.
The 1.5SMCxxH series was developed specifically for high-reliability 1500W transient suppression in automotive and industrial 12–200V DC systems, emphasizing fast response, low leakage, and standardized SMC packaging for automated manufacturing.
FAQ
What is the polarity configuration of the 1.5SMC20CH?
The 1.5SMC20CH is a unidirectional TVS diode, with cathode marked by a band on the DO-214AB package. It conducts only during reverse-biased overvoltage events-clamping positive transients on the cathode side to ground. This configuration matches standard 24V supply rail protection layouts and differs from bidirectional variants like 1.5SMC20CAH.
Does the 1.5SMC20CH meet automotive qualification standards?
Yes, the 1.5SMC20CH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b. Its construction-including glass-passivated junction, matte tin-plated leads, and moisture sensitivity level 1-supports automotive under-hood deployment up to 150 °C junction temperature, as confirmed in Taiwan Semiconductor's B2207 datasheet.
What is the maximum clamping voltage of the 1.5SMC20CH under surge conditions?
The 1.5SMC20CH has a maximum clamping voltage (VC) of 29.1 V at 54 A peak impulse current (IPPM), measured under the standard 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and ensures protected circuitry remains within safe voltage margins during worst-case transients.
How does the 1.5SMC20CH compare to the 1.5SMC20AH variant?
The 1.5SMC20CH has a tighter breakdown voltage range (18.0–22.0 V) versus 1.5SMC20AH (19.0–21.0 V), resulting in higher minimum VBR and slightly higher VWM (16.2 V vs. 17.1 V). Both share identical package, power rating, and clamping performance, but the 'H' suffix denotes standard tolerance, while 'AH' indicates enhanced VBR consistency for precision-sensitive applications.
Is the 1.5SMC20CH RoHS and halogen-free compliant?
Yes, the 1.5SMC20CH is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated per J-STD-002 solderability standards-fully documented in the B2207 revision of the Taiwan Semiconductor datasheet.
1.5SMC20CH 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):
- 16.2V
- Voltage - Breakdown (Min):
- 18V
- Voltage - Clamping (Max) @ Ipp:
- 29.1V
- Current - Peak Pulse (10/1000µs):
- 54A
- 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)
1.5SMC20CH FAQ
1.How can I place an order for 1.5SMC20CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20CH 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 1.5SMC20CH reliable?
The price and inventory of 1.5SMC20CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC20CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC20CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20CH?
1.5SMC20CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20CH 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 1.5SMC20CH?
For technical support, including 1.5SMC20CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20CH requirements.
6.How does Aetrix verify that 1.5SMC20CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20CH 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 1.5SMC20CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC20CH?
All 1.5SMC20CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20CH, 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 1.5SMC20CH part is unused and in its original packaging.
Return procedure for 1.5SMC20CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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