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Taiwan Semiconductor Corporation 1.5SMC68AH
- Part No.:
- 1.5SMC68AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68AH.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,050
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Product details
Overview
1.5SMC68AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 64.6–71.4 V breakdown voltage (VBR), 58.1 V working stand-off voltage (VWM), 92.0 V maximum clamping voltage (VC) at 17 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 µs waveform - deployed in telecom front-ends, automotive body control modules, and industrial I/O protection.
For engineers reviewing the 1.5SMC68AH datasheet, 1.5SMC68AH pinout, 1.5SMC68AH application, or 1.5SMC68AH equivalent, this page delivers verified electrical parameters, DO-214AB package dimensions, ISO 7637-2 compliance evidence, AEC-Q101 qualification status, and direct alternative part comparisons - all grounded in Taiwan Semiconductor's B2207 specification release.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1.0 ps) and low leakage (<1 µA @ 58.1 V). Its unidirectional configuration provides asymmetric clamping: forward conduction begins at ~3.5 V (per spec note), while reverse avalanche triggers precisely within the 64.6–71.4 V VBR band at 1 mA test current.
Thermally, it sustains operation from –55 °C to +150 °C with RθJA = 50 °C/W and RθJC = 15 °C/W. The DO-214AB (SMC) package supports automated placement and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 64.6 V / 71.4 V - defines guaranteed reverse avalanche initiation range at 1 mA; ensures robust margin above 58.1 V operating rail |
| VWM | 58.1 V - maximum continuous reverse voltage before significant leakage; sets upper limit for protected circuit DC bias |
| VC @ IPPM | 92.0 V at 17 A - clamped voltage during 10/1000 µs surge; determines worst-case stress on downstream ICs |
| PPK | 1500 W - peak pulse power handling per standard waveform; enables protection against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients |
| IR @ VWM | <1 µA - ultra-low blocking leakage; prevents parasitic loading on high-impedance sensor or reference circuits |
| TJ max | +150 °C - maximum junction temperature; supports under-hood automotive and industrial ambient conditions |
| Package | DO-214AB (SMC) - industry-standard SMT outline with 7.11 mm × 6.22 mm footprint and cathode band polarity marking |
Pinout & Package
DO-214AB (SMC) is a two-terminal surface-mount package with cathode band marking on one end. Terminals are matte tin-plated for J-STD-002 solderability and rated for 200 A non-repetitive forward surge (IFSM).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-side return in unidirectional clamp configuration |
| Cathode | Reverse voltage sensing / Clamping output node | Connected to protected line (e.g., CAN_H, RS-485 A, 12 V rail); clamps to anode when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - suitable for body control, lighting, and infotainment systems |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) without degradation |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives; critical for humid industrial environments |
| Fast response time <1.0 ps | Clamps ESD and lightning-induced surges before sensitive ICs experience overstress - essential for USB, Ethernet, and sensor interfaces |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow - simplifies SMT production planning and reduces handling overhead |
Applications
| Automotive Power Line Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: 12 V battery rail in vehicle body control module exposed to load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and chassis ground to clamp ISO 7637-2 Pulse 5a surges up to 100 V. Use Value: Limits peak clamped voltage to 92.0 V, protecting downstream PMICs and microcontrollers rated for ≤100 V absolute maximum. |
Use Scenario: RS-485 transceiver bus lines (A/B) in factory automation PLC I/O modules subject to ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional protection achieved using two 1.5SMC68AH devices back-to-back (anode-to-anode), enabling symmetrical ±92.0 V clamping. Use Value: Maintains signal integrity by limiting transient overshoot below transceiver common-mode range (±12 V), preventing latch-up or damage. |
| Telecom DC Power Input | Consumer USB-C Port ESD Protection |
Use Scenario: 48 V DC input stage of VoIP phone or small cell base station powered via PoE or wall adapter. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converter; absorbs lightning-induced surges coupled through AC/DC transformer or external cabling. Use Value: 1500 W peak power rating handles 10/1000 µs surges up to 17 A without thermal runaway, ensuring system-level surge immunity per IEC 61000-4-5. |
Use Scenario: VBUS line in USB-C receptacle where hot-plug events and human-body-model (HBM) ESD can exceed 15 kV. IC Role / Device Role / Timing Role: Secondary protection device after integrated ESD array; absorbs residual energy that bypasses front-end filtering. Use Value: Sub-1 µA leakage at 58.1 V prevents battery drain in portable devices; <1 ps response captures fast HBM transients before internal transceiver fails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | Lower PPK = 600 W; VBR = 71.1–78.6 V; SMB package (smaller footprint, higher RθJA) | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy ESD/lightning events | Select when space-constrained layout prioritizes size over 1500 W surge capacity |
| 1.5KE68A | Through-hole TO-204AA (DO-41); same VBR/VC specs but slower response (~1 ns) and no AEC-Q101 qualification | Requires manual assembly or wave soldering; not automotive-qualified | Choose only for legacy through-hole designs or non-automotive industrial use where SMT is unavailable |
Compared with SMBJ64A and 1.5KE68A, the 1.5SMC68AH uniquely combines AEC-Q101 qualification, 1500 W surge rating, DO-214AB SMT compatibility, and sub-1 µA leakage - making it the preferred choice for new automotive and high-reliability industrial designs requiring drop-in manufacturability and certified stress resilience.
Availability
1.5SMC68AH is available at Aetrix Electronics and suitable for automotive power line protection, industrial RS-485 interface hardening, telecom DC input surge suppression, and consumer USB-C port ESD mitigation requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC68AH 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 power management components.
The 1.5SMCxxAH series was developed specifically for AEC-Q101-compliant automotive and industrial transient suppression, emphasizing glass-passivated reliability, ISO 7637-2 compliance, and automated SMT manufacturability in the DO-214AB package.
FAQ
What is the breakdown voltage tolerance for 1.5SMC68AH?
The 1.5SMC68AH has a specified breakdown voltage (VBR) range of 64.6 V to 71.4 V at 1 mA test current, representing a ±5% tolerance about the nominal 68 V rating. This tight band ensures consistent clamping behavior across production lots and supports reliable design margining against 58.1 V working stand-off voltage.
Is 1.5SMC68AH suitable for bidirectional transient protection?
1.5SMC68AH is a unidirectional TVS diode, but it can be used in bidirectional configurations by connecting two units anode-to-anode. Taiwan Semiconductor confirms this arrangement provides symmetrical clamping for both polarities, matching the performance of dedicated bidirectional parts like 1.5SMC68CAH - though layout area increases by ~100%.
Does 1.5SMC68AH meet automotive qualification standards?
Yes, 1.5SMC68AH is AEC-Q101 qualified and tested per the full stress sequence including HTGB, HTRB, TCT, and mechanical shock. It also meets ISO 7637-2 Pulse 1/2a/2b/3a/3b requirements - confirming suitability for automotive power distribution, body electronics, and infotainment subsystems.
What is the maximum clamping voltage of 1.5SMC68AH under surge conditions?
The 1.5SMC68AH exhibits a maximum clamping voltage (VC) of 92.0 V when subjected to its rated 17 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at t = td/2 per Fig.5 in the datasheet and defines the worst-case voltage seen by protected circuitry during surge events.
How does the DO-214AB package of 1.5SMC68AH compare to SMB in thermal performance?
The DO-214AB (SMC) package of 1.5SMC68AH delivers RθJC = 15 °C/W and RθJA = 50 °C/W, significantly better than typical SMB packages (RθJA ≈ 70–85 °C/W). This enables higher sustained power dissipation and improved reliability in thermally dense layouts - especially critical for repeated surge events in industrial controls.
1.5SMC68AH 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):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 17A
- 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)
1.5SMC68AH FAQ
1.How can I place an order for 1.5SMC68AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68AH 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 1.5SMC68AH reliable?
The price and inventory of 1.5SMC68AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC68AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC68AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68AH?
1.5SMC68AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68AH 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 1.5SMC68AH?
For technical support, including 1.5SMC68AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68AH requirements.
6.How does Aetrix verify that 1.5SMC68AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68AH 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 1.5SMC68AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC68AH?
All 1.5SMC68AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68AH, 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 1.5SMC68AH part is unused and in its original packaging.
Return procedure for 1.5SMC68AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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