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Taiwan Semiconductor Corporation 1.5SMC56CAH
- Part No.:
- 1.5SMC56CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56CAH.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,839
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Product details
Overview
1.5SMC56CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 56V, clamping voltage of 77.0V at 20A peak impulse current, and DO-214AB (SMC) package. It provides ESD and surge protection for automotive power lines, industrial I/O ports, and telecom DC feeds.
For engineers reviewing the 1.5SMC56CAH datasheet, 1.5SMC56CAH pinout, 1.5SMC56CAH application, or 1.5SMC56CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, <1.0ps response time, and 1μA max leakage at 47.8V working stand-off voltage.
Technical Context
This TVS diode operates in avalanche mode to clamp transient overvoltages across protected circuits. Its bidirectional configuration enables symmetric suppression of positive and negative polarity surges without external polarity management. The glass-passivated junction ensures stable VBR tolerance (±5% for 1.5SMC56AH variant) and low leakage under reverse bias.
Thermal performance is defined by RθJA = 50°C/W and RθJC = 15°C/W, supporting reliable operation up to TJ = +150°C. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - enabling compatibility with standard SMT reflow profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR Min/Max | 53.2V / 58.8V @ 1mA test current - defines guaranteed conduction onset range for bidirectional surge clamping |
| VWM | 47.8V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 77.0V @ 20A - peak clamped voltage during 10/1000μs surge, limiting downstream stress |
| PPK | 1500W - peak pulse power handling per single non-repetitive 10/1000μs waveform |
| IR @ VWM | <1μA - ultra-low leakage ensures minimal standby power loss in high-impedance circuits |
| TJ Range | −55°C to +150°C - supports under-hood automotive and industrial ambient environments |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional, cathode band not applicable (symmetrical terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Identical terminals enable bidirectional surge conduction - no polarity orientation required during placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line spikes) without degradation |
| Fast response time | <1.0ps - limits voltage overshoot before clamping engages, protecting sensitive IC inputs |
| Glass passivated junction | Ensures stable VBR drift <0.103%/°C and long-term parameter consistency across life cycle |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Line Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: 12V/24V battery-fed ECUs exposed to load-dump and jump-start transients per ISO 7637-2. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail and ground to clamp ±100V transients within 10/1000μs. Use Value: Limits rail voltage to ≤77.0V during 20A surge, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: PLC digital input modules interfacing with field sensors subject to ESD and inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS on each channel to absorb ±8kV contact ESD (IEC 61000-4-2) and 1A/50μs inductive spikes. Use Value: Sub-1ps response ensures clamping initiates before microcontroller GPIO latch-up occurs. |
| Telecom DC Power Feed Protection | Consumer USB-C Power Delivery Interface |
Use Scenario: -48V DC feed lines in base station remote radio units subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS installed between PSE output and PD input to suppress common-mode transients up to 1500W. Use Value: 77.0V clamping protects PoE PD controllers rated for 57V absolute max, maintaining safe margin. |
Use Scenario: VBUS line in USB-C receptacles exposed to hot-plug transients and ESD during cable insertion. IC Role / Device Role / Timing Role: Low-leakage (≤1μA @ 47.8V) TVS placed inline with VBUS to avoid affecting 5–20V PD negotiation. Use Value: 47.8V working stand-off allows full USB PD 3.0 20V operation while clamping >53.2V surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56CA | 600W rating, SMB package (smaller footprint), VC = 93.6V @ 10.1A | Lower power handling; suitable only for sub-1kW surge events | Select when board space is constrained and peak surge energy is ≤600W |
| 1.5KE56CA | Through-hole DO-201 package, same 1500W rating, VC = 93.6V @ 16.1A | Not SMT-compatible; requires wave solder or hand assembly | Select only for legacy through-hole designs or prototyping where reflow is unavailable |
Compared with SMBJ56CA and 1.5KE56CA, the 1.5SMC56CAH delivers identical 1500W surge capacity in an SMT-optimized DO-214AB package with lower clamping voltage (77.0V vs. ≥93.6V), tighter VBR tolerance (±5%), and AEC-Q101 qualification - making it preferred for automotive and high-reliability industrial deployments.
Availability
1.5SMC56CAH is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, and telecom DC power feeds requiring stable component supply, AEC-Q101 compliance, and ISO 7637-2 surge immunity.
Supply support for 1.5SMC56CAH 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 for automotive, industrial, and consumer markets.
The 1.5SMCxxCAH series was designed specifically for high-power, surface-mount transient suppression in harsh environments - emphasizing AEC-Q101 reliability, fast response, and bidirectional symmetry for modern automotive and industrial power systems.
FAQ
What is the clamping voltage of the 1.5SMC56CAH under a 20A transient?
The 1.5SMC56CAH has a maximum clamping voltage (VC) of 77.0V when subjected to a 10/1000μs surge waveform with a peak current (IPPM) of 20A. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 77.0V during such an event - critical for protecting 5V–36V-rated ICs in automotive and industrial applications. The 1.5SMC56CAH achieves this with low dynamic impedance and tight VBR distribution.
Is the 1.5SMC56CAH suitable for automotive applications?
Yes, the 1.5SMC56CAH is AEC-Q101 qualified and explicitly tested to ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b standards - making it suitable for 12V/24V automotive power line protection in ECUs, body control modules, and ADAS sensors. Its −55°C to +150°C operating junction temperature range, glass-passivated junction, and JESD201 Class 2 whisker resistance further validate its use in under-hood and chassis-mounted systems. The 1.5SMC56CAH meets all requirements for automotive-grade transient suppression.
How does the 1.5SMC56CAH differ from unidirectional variants like 1.5SMC56H?
The 1.5SMC56CAH is bidirectional, meaning it clamps transients of either polarity symmetrically - ideal for AC-coupled lines or DC rails where reverse-voltage surges may occur. In contrast, 1.5SMC56H is unidirectional and requires correct cathode orientation. Electrically, 1.5SMC56CAH has VBR = 53.2–58.8V and VC = 77.0V @ 20A, while 1.5SMC56H has VBR = 50.4–61.6V and VC = 80.5V @ 19A. The 1.5SMC56CAH also features tighter VBR tolerance and is marked with "CAH" suffix per TSC's ordering code convention.
What is the maximum leakage current of the 1.5SMC56CAH at its working voltage?
The 1.5SMC56CAH exhibits a maximum blocking leakage current (IR) of 1μA when biased at its working stand-off voltage (VWM) of 47.8V. This ultra-low leakage ensures minimal power loss in high-impedance monitoring circuits and avoids false triggering in precision analog front-ends. The specification is verified at TA = 25°C and remains below 5μA even at +85°C - confirming suitability for always-on automotive and industrial subsystems using the 1.5SMC56CAH.
Does the 1.5SMC56CAH require special PCB layout considerations?
Yes - to preserve its <1.0ps response and minimize parasitic inductance, the 1.5SMC56CAH should be placed directly across the protected node and return path with short, wide traces (<5mm total loop length). Thermal relief pads are recommended for the DO-214AB (SMC) package to ensure proper solder joint formation during reflow. The 1.5SMC56CAH benefits from symmetric copper pours on both terminals and avoidance of vias in the surge current path - especially critical in ISO 7637-2 Pulse 1 compliance testing.
1.5SMC56CAH 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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 20A
- 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)
1.5SMC56CAH FAQ
1.How can I place an order for 1.5SMC56CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56CAH 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 1.5SMC56CAH reliable?
The price and inventory of 1.5SMC56CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56CAH is usually 5 days.
3.What payment methods are accepted for 1.5SMC56CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56CAH?
1.5SMC56CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56CAH 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 1.5SMC56CAH?
For technical support, including 1.5SMC56CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56CAH requirements.
6.How does Aetrix verify that 1.5SMC56CAH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56CAH 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 1.5SMC56CAH meets industry standards.
7.What is the process for return or replacement of 1.5SMC56CAH?
All 1.5SMC56CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56CAH, 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 1.5SMC56CAH part is unused and in its original packaging.
Return procedure for 1.5SMC56CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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