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Taiwan Semiconductor Corporation 1.5SMC56CH
- Part No.:
- 1.5SMC56CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56CH.pdf
- Description:
- 1500W, 56V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,164
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Product details
Overview
1.5SMC56CH from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) in DO-214AB (SMC) package, with breakdown voltage 50.4–61.6 V at 1 mA test current, clamping voltage 80.5 V at 19 A peak pulse current, and working stand-off voltage 45.4 V. It protects automotive and industrial power rails against ESD, lightning-induced surges, and load-switch transients.
For engineers reviewing the 1.5SMC56CH datasheet, 1.5SMC56CH pinout, 1.5SMC56CH application, or 1.5SMC56CH equivalent, key selection criteria include unidirectional vs. bidirectional polarity, clamping ratio (VC/VBR ≈ 1.37), junction temperature range (–55°C to +150°C), and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance for automotive electronics.
Technical Context
This bidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response (<1.0 ps), low leakage (<1 µA at 45.4 V), and robust surge handling per IEC 61000-4-2 (ESD) and ISO 7637-2. Its symmetrical V-I characteristics enable protection on AC lines or differential signal pairs without polarity constraints.
Thermal design relies on RθJA = 50°C/W and RθJC = 15°C/W, supporting operation up to 150°C junction temperature. The DO-214AB package provides mechanical robustness and meets UL 94V-0 flammability rating, with matte tin-plated leads compliant to J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 50.4 V / 61.6 V at 1 mA - defines minimum and maximum voltage at which device enters avalanche conduction under controlled DC test |
| VWM | 45.4 V - maximum continuous reverse operating voltage before significant leakage begins; sets safe operating margin below VBR |
| VC @ IPPM | 80.5 V at 19 A - clamping voltage during 10/1000 µs surge; determines peak stress imposed on protected downstream circuitry |
| PPK | 1500 W - peak pulse power dissipation capability for non-repetitive 1 ms pulses; defines transient energy absorption capacity |
| IR @ VWM | <1 µA - blocking leakage current at working voltage; ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150°C - maximum allowable junction temperature; enables use in under-hood automotive or high-ambient industrial environments |
| Package | DO-214AB (SMC) - surface-mount package with 7.11 mm × 6.22 mm footprint and 2.3 mm height; supports automated placement and reflow soldering |
Pinout & Package
DO-214AB (SMC) is a two-terminal surface-mount package with cathode band marking for unidirectional variants; the 1.5SMC56CH is bidirectional and marked with "FHJ" code - terminals are non-polarized and function identically in both directions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Surge current path | Both terminals serve as symmetrical avalanche junction endpoints; no polarity dependency - connects across protected line-to-line or line-to-ground |
| Case | Thermal and mechanical interface | Exposed copper slug provides primary thermal conduction path to PCB copper pour; requires adequate thermal pad area per manufacturer layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias HAST, and mechanical shock - 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) waveforms - eliminates need for external filtering in 12 V/24 V vehicle systems |
| Fast response time | <1.0 ps junction response enables clamping before transient energy couples into sensitive ICs - critical for protecting CAN, LIN, and sensor interfaces |
| Moisture sensitivity level 1 | No floor life limitation or baking requirement prior to reflow - simplifies SMT manufacturing and reduces process overhead |
| RoHS & halogen-free | Complies with EU RoHS Directive 2011/65/EU and IEC 61249-2-21 - meets environmental requirements for global OEM and Tier 1 supply chains |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery rail in passenger vehicle infotainment head unit exposed to load-dump transients up to 35 V and ISO 7637-2 Pulse 1. IC Role / Device Role / Timing Role: Bidirectional TVS placed between VBAT and GND to clamp surges before they reach DC-DC converters and microcontrollers. Use Value: Clamps 35 V transients to ≤80.5 V within <1 ps, preventing latch-up or permanent damage to 5 V/3.3 V logic supplies downstream. | Use Scenario: 4–20 mA current-loop transmitter in factory automation PLC module subjected to ESD events from field wiring. IC Role / Device Role / Timing Role: Bidirectional TVS connected across loop terminals to shunt ESD strikes and inductive kickback from solenoid actuation. Use Value: Limits voltage excursion to 80.5 V during 8 kV contact discharge (IEC 61000-4-2), preserving analog front-end accuracy and preventing op-amp saturation. |
| Telecom Data Line Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: RS-485 transceiver port in outdoor security camera exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional TVS placed differentially across A/B lines and common-mode across A-GND/B-GND to suppress both differential and common-mode transients. Use Value: Absorbs 1500 W peak pulse energy while maintaining <1 µA leakage at 45.4 V, ensuring signal integrity during normal operation and fast recovery post-surge. | Use Scenario: USB 2.0 data lines (D+/D−) in smart speaker subjected to human-body-model ESD during plug/unplug cycles. IC Role / Device Role / Timing Role: Bidirectional TVS array (dual-channel variant) placed on D+ and D− lines to clamp ±8 kV ESD to safe levels without affecting 480 Mbps signaling. Use Value: Sub-1 ps response prevents ESD energy from coupling into USB PHY, avoiding data corruption or host controller reset - validated per IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58CA | 600 W rating, SMB package (smaller footprint), VBR = 64.4–71.4 V, VC = 93.6 V @ 6.4 A | Limited to lower-energy transients; not rated for ISO 7637-2 Pulse 1 | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4 only |
| 1.5KE56CA | Through-hole DO-201 package, same 1500 W rating, VBR = 47.8–58.2 V, VC = 93.6 V @ 16 A | Not AEC-Q101 qualified; lacks moisture sensitivity level 1 and automotive waveform validation | Select for cost-sensitive industrial controls where SMT is not required and automotive qualification is unnecessary |
Compared with SMBJ58CA and 1.5KE56CA, the 1.5SMC56CH delivers higher surge robustness in a compact SMT package with full automotive qualification - making it the preferred choice for space-constrained, safety-critical vehicle subsystems requiring ISO 7637-2 immunity.
Availability
1.5SMC56CH is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom data line surge suppression, and consumer USB port ESD protection requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC56CH 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 headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The 1.5SMCxxCH series is part of TSC's AEC-Q101-qualified TVS portfolio designed specifically for robust, high-energy transient suppression in harsh automotive and industrial environments - emphasizing reliability, standardized waveform compliance, and SMT manufacturability.
FAQ
What does the 'CH' suffix indicate in 1.5SMC56CH?
The 'CH' suffix in 1.5SMC56CH denotes a bidirectional configuration with a center-tap–free, symmetrical V-I characteristic - enabling protection on AC lines or differential buses without polarity concerns. Unlike unidirectional 'H' variants, the 1.5SMC56CH has identical breakdown and clamping behavior in both directions, verified per ANSI/IEEE C62.35 standards.
Is 1.5SMC56CH AEC-Q101 qualified and what tests does that include?
Yes, 1.5SMC56CH is AEC-Q101 qualified. Certification includes stress testing for temperature cycling (–40°C to +125°C, 1000 cycles), unbiased HAST (130°C, 85% RH, 96 hours), mechanical shock (3000 g), and ESD (HBM ≥8 kV). These tests validate reliability for automotive under-hood and cabin applications, as documented in Taiwan Semiconductor's qualification report B2207.
What is the clamping voltage of 1.5SMC56CH and how is it measured?
The clamping voltage of 1.5SMC56CH is 80.5 V, measured at 19 A peak pulse current (IPPM) using the 10/1000 µs double-exponential surge waveform defined in Fig.5 of the datasheet. This value represents the maximum voltage seen across the device during a standardized transient event - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings.
Can 1.5SMC56CH replace unidirectional 1.5SMC56H in existing designs?
No - 1.5SMC56CH cannot directly replace unidirectional 1.5SMC56H without circuit review. While both share identical VBR, VWM, and PPK, the 1.5SMC56CH conducts in both directions and lacks a defined cathode. Using it in place of a unidirectional TVS may cause unintended conduction in DC-biased rails. Verify polarity requirements and system-level surge paths before substitution.
What is the thermal resistance and recommended PCB layout for 1.5SMC56CH?
The 1.5SMC56CH has RθJA = 50°C/W and RθJC = 15°C/W. Taiwan Semiconductor recommends a minimum 100 mm² copper thermal pad (2-layer, 2 oz Cu) connected via ≥4 thermal vias (0.3 mm diameter) to internal ground planes. The suggested pad layout in Rev. B2207 specifies 2.5 mm × 5.5 mm solder mask openings to ensure reliable reflow and mechanical adhesion.
1.5SMC56CH 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):
- 45.4V
- Voltage - Breakdown (Min):
- 50.4V
- Voltage - Clamping (Max) @ Ipp:
- 80.5V
- Current - Peak Pulse (10/1000µs):
- 19A
- 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)
1.5SMC56CH FAQ
1.How can I place an order for 1.5SMC56CH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56CH 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 1.5SMC56CH reliable?
The price and inventory of 1.5SMC56CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56CH is usually 5 days.
3.What payment methods are accepted for 1.5SMC56CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56CH?
1.5SMC56CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56CH 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 1.5SMC56CH?
For technical support, including 1.5SMC56CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56CH requirements.
6.How does Aetrix verify that 1.5SMC56CH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56CH 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 1.5SMC56CH meets industry standards.
7.What is the process for return or replacement of 1.5SMC56CH?
All 1.5SMC56CH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56CH, 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 1.5SMC56CH part is unused and in its original packaging.
Return procedure for 1.5SMC56CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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