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Taiwan Semiconductor Corporation 1.5SMC56AH
- Part No.:
- 1.5SMC56AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56AH.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,554
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Product details
Overview
1.5SMC56AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It delivers 1500W peak pulse power, 53.2–58.8V breakdown voltage (VBR), 47.8V working stand-off voltage (VWM), and clamps to ≤77.0V at 20A peak impulse current - deployed in automotive power supply rails and industrial I/O protection.
For engineers reviewing the 1.5SMC56AH datasheet, 1.5SMC56AH pinout, 1.5SMC56AH application, or 1.5SMC56AH equivalent, key selection criteria include clamping voltage margin vs. protected IC VCC, leakage current at operating voltage, AEC-Q101 qualification status, and DO-214AB thermal performance under repetitive surge conditions.
Technical Context
This TVS operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1.0 ps) to ESD and lightning-induced transients per ISO 7637-2 Pulse 1/2a/2b/3a/3b. Its 150°C maximum junction temperature and 50°C/W junction-to-ambient thermal resistance support reliable operation in high-temperature automotive engine compartments.
Electrical behavior is defined by precise VBR tolerance (±5% for 1.5SMC56AH), low leakage (<1 µA at 47.8V), and stable temperature coefficient (0.103%/°C). The device uses a single-die DO-214AB package with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 53.2–58.8V - ensures reliable avalanche conduction above system nominal voltage while avoiding false triggering |
| VWM | 47.8V - maximum continuous reverse voltage before significant leakage; sets upper limit for protected circuit operating range |
| VC @ IPPM=20A | ≤77.0V - clamping voltage during 10/1000µs surge; must stay below protected IC absolute maximum rating |
| PPK | 1500W - peak pulse power handling per 1ms waveform; determines survivability against ISO 7637-2 Pulse 5a/b surges |
| IR @ VWM | <1µA - ultra-low blocking leakage preserves battery life in always-on automotive modules |
| TJ max | +150°C - enables use in under-hood ECUs without derating at ambient up to +125°C |
| Package | DO-214AB (SMC) - industry-standard SMT footprint with 0.210g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking on one end; two-terminal unidirectional configuration. Matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Connected to protected circuit ground or low-side return path | Completes surge current path during reverse-biased clamping; requires low-inductance PCB trace to GND plane |
| Cathode | Connected to protected line (e.g., 48V rail, CAN_H) | Accepts transient energy from upstream source; polarity marking ensures correct orientation in series protection topology |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Enables stable VBR and low leakage over 15-year vehicle lifetime with minimal parameter drift |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms |
| Fast response time | <1.0 ps turn-on delay prevents sub-nanosecond ESD events from reaching downstream ICs |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement before reflow; supports standard SMT assembly without special handling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 48V mild-hybrid vehicle control units from load dump transients up to 120V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and DC-DC converter input. Use Value: Clamps 1500W surges to ≤77.0V, preventing damage to 80V-rated MOSFETs and maintaining ASIL-B functional safety integrity. | Use Scenario: Shielding 4–20mA current loop transmitters from ESD and field wiring surges in factory automation. IC Role / Device Role / Timing Role: Series-connected TVS on loop supply line, upstream of precision DAC and op-amp circuitry. Use Value: Sub-1µA leakage at 47.8V avoids measurement error in µA-level current sensing; DO-214AB footprint fits tight PCB spacing. |
| Telecom DC Power Input | Automotive LIN Bus Line |
Use Scenario: Safeguarding PoE-powered network switches against AC/DC adapter transients and lightning-induced common-mode spikes. IC Role / Device Role / Timing Role: Bidirectional protection (using 1.5SMC56CAH variant) across primary DC input terminals. Use Value: 1500W rating handles 10/1000µs surges exceeding IEC 61000-4-5 Level 4; RoHS/halogen-free compliance meets telecom environmental mandates. | Use Scenario: Adding robustness to LIN physical layer against battery disconnect spikes and ESD in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS from LIN bus line to chassis ground, leveraging low VC to protect 12V-tolerant transceivers. Use Value: 77.0V clamping ensures transceiver survival during 100V load dump events; AEC-Q101 qualification validates suitability for automotive serial bus nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A | 600W PPK, DO-214AA (SMB) package, higher VC (93.6V @ 10.3A) | Limited to lower-energy surges; unsuitable for ISO 7637-2 Pulse 5a/b | Select only if board space constraints prohibit DO-214AB and surge threat level is <600W |
| 1.5KE56A | Through-hole TO-204AA (DO-41), 1500W but slower response (>1ns), no AEC-Q101 qualification | Not suitable for automated SMT assembly or automotive under-hood environments | Use only in legacy through-hole designs where rework is acceptable and automotive qualification is not required |
Compared with SMBJ56A and 1.5KE56A, the 1.5SMC56AH provides superior surge immunity (1500W), automotive-grade reliability (AEC-Q101), and SMT manufacturability - making it the optimal choice for new automotive and industrial designs requiring robust, high-power transient suppression in compact form factor.
Availability
1.5SMC56AH is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, and telecom DC input protection requiring stable component supply and long-term lifecycle assurance.
Supply support for 1.5SMC56AH 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, and power MOSFETs for automotive and industrial markets.
The 1.5SMCxxAH product line targets high-reliability transient suppression in harsh environments, with design focus on AEC-Q101 compliance, ISO 7637-2 immunity, and SMT process compatibility for next-generation automotive ECUs and industrial controllers.
FAQ
What is the maximum clamping voltage of the 1.5SMC56AH under specified test conditions?
The 1.5SMC56AH has a maximum clamping voltage (VC) of 77.0V when subjected to a 10/1000µs surge waveform at 20A peak impulse current (IPPM). This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events. Maintaining VC below the absolute maximum rating of downstream components is critical for system-level surge resilience.
Is the 1.5SMC56AH suitable for bidirectional transient protection?
No - the 1.5SMC56AH is a unidirectional TVS diode intended for DC line protection with defined anode/cathode polarity. For bidirectional applications such as AC lines or differential buses, the 1.5SMC56CAH variant (with CAH suffix) must be used. That part features symmetrical breakdown in both directions and identical VBR, VWM, and VC ratings for positive and negative surges.
Does the 1.5SMC56AH meet automotive qualification standards?
Yes - the 1.5SMC56AH is AEC-Q101 qualified and tested per the full stress test schedule including HTGB, HTRB, TCT, and ESD. It also meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements, confirming its suitability for automotive power net and signal line protection in passenger vehicles and commercial vehicles.
What is the thermal resistance profile of the 1.5SMC56AH in typical PCB mounting?
The 1.5SMC56AH exhibits a junction-to-ambient thermal resistance (RθJA) of 50°C/W and junction-to-case resistance (RθJC) of 15°C/W when mounted on a standard FR-4 PCB with minimum copper area. These values assume JEDEC-standard test conditions and enable accurate thermal modeling for sustained surge duty cycles or elevated ambient temperatures up to +125°C.
How does the 1.5SMC56AH compare to the 1.5SMC56H in terms of electrical parameters?
The 1.5SMC56AH offers tighter VBR tolerance (53.2–58.8V, ±5%) versus 1.5SMC56H (50.4–61.6V, ±10%), lower VWM (47.8V vs. 45.4V), and reduced VC (77.0V vs. 80.5V at same IPPM). These improvements provide more precise voltage thresholding and lower clamping stress on protected circuits - making the 1.5SMC56AH preferred for high-accuracy or low-margin designs.
1.5SMC56AH 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):
- 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)
1.5SMC56AH FAQ
1.How can I place an order for 1.5SMC56AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56AH 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 1.5SMC56AH reliable?
The price and inventory of 1.5SMC56AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC56AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC56AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56AH?
1.5SMC56AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56AH 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 1.5SMC56AH?
For technical support, including 1.5SMC56AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56AH requirements.
6.How does Aetrix verify that 1.5SMC56AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56AH 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 1.5SMC56AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC56AH?
All 1.5SMC56AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56AH, 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 1.5SMC56AH part is unused and in its original packaging.
Return procedure for 1.5SMC56AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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