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Taiwan Semiconductor Corporation 1.5SMC39AH
- Part No.:
- 1.5SMC39AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39AH.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,544
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Product details
Overview
1.5SMC39AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 37.1–41.0V breakdown voltage at 1mA test current, and 53.9V maximum clamping voltage at 29A peak impulse current. It protects automotive and industrial power rails against ESD, load dump, and lightning-induced transients.
For engineers reviewing the 1.5SMC39AH datasheet, 1.5SMC39AH pinout, 1.5SMC39AH application, or 1.5SMC39AH equivalent, this device delivers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1μA leakage above 33.3V working stand-off voltage, and glass-passivated junction reliability for high-volume automated assembly.
Technical Context
The 1.5SMC39AH operates as a unidirectional avalanche diode with a single-die construction optimized for fast transient suppression in DC power lines. Its clamping behavior is defined by a tightly controlled VBR range (37.1–41.0V), low thermal resistance (RθJC = 15°C/W), and guaranteed clamping at ≤53.9V under 29A 10/1000μs waveform per Fig.5.
Designed for automotive-grade robustness, it meets AEC-Q101 stress testing and ISO 7637-2 immunity requirements across all five pulse types. Its 33.3V VWM, 1μA IR @ VWM, and 0.100%/°C VBR temperature coefficient ensure stable overvoltage protection in ambient temperatures from –55°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 37.1–41.0V - Ensures reliable turn-on before system damage occurs during overvoltage events |
| VWM | 33.3V - Maximum continuous reverse operating voltage without significant leakage |
| VC @ IPPM = 29A | ≤53.9V - Clamped voltage seen by protected ICs during worst-case 10/1000μs surge |
| PPK | 1500W - Peak transient energy absorption capability per single non-repetitive pulse |
| IR @ VWM | ≤1μA - Minimal standby power loss and signal integrity impact in always-on circuits |
| TJ max | +150°C - Enables operation in under-hood automotive and high-temperature industrial environments |
| Package | DO-214AB (SMC) - Standardized SMT footprint compatible with IPC-7351B land patterns |
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 JESD201 Class 2 whisker resistance standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference node | Connected to system ground or low-side return path; defines polarity-sensitive clamping direction |
| Cathode | Protected line input | Connected to supply rail (e.g., 24V battery line); conducts avalanche current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (board-level noise) |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| Fast response time | Typically <1.0ps - Limits voltage overshoot before clamping action engages |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow; supports standard SMT assembly flow |
Applications
| Automotive Power Distribution | Industrial PLC I/O Protection |
|---|---|
Use Scenario: 24V battery rail in engine control units exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤53.9V, protecting downstream 40V-rated regulators and microcontrollers without derating margin loss. | Use Scenario: Digital input module receiving 24V sensor signals in factory automation cabinets. IC Role / Device Role / Timing Role: Input-side transient suppressor on each channel before optocoupler or Schmitt trigger interface. Use Value: Prevents false triggering and latch-up caused by ESD events or inductive switching noise on long field wiring. |
| Telecom DC Power Feeds | Medical Equipment Auxiliary Supplies |
Use Scenario: -48V telecom rectifier output feeding base station backplane logic. IC Role / Device Role / Timing Role: Primary overvoltage protector on centralized power bus before point-of-load converters. Use Value: Absorbs up to 1500W surge energy while maintaining ≤53.9V clamping, preserving ASIC and FPGA power integrity. | Use Scenario: 12V auxiliary supply for display and communication modules in diagnostic imaging systems. IC Role / Device Role / Timing Role: Secondary protection after primary fuse and MOV, providing precise low-leakage clamping. Use Value: Delivers <1μA leakage at 33.3V, avoiding standby current accumulation across dozens of parallel channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | 600W rating, 36V VWM, 58.1V VC @ 10.3A; DO-214AA (SMB) package | Lower power handling limits use in lower-energy surge environments only | Select when board space is constrained and peak surge energy remains below 600W |
| 1.5KE39A | Through-hole TO-204AA (DO-41), 1500W, 39V VWM, 60.5V VC @ 24.9A | Requires wave solder or hand-solder process; not suitable for fully automated SMT lines | Choose for legacy designs or prototyping where through-hole assembly is retained |
Compared with SMBJ36A and 1.5KE39A, the 1.5SMC39AH provides higher surge current capacity (29A vs. 10.3A/24.9A) in an AEC-Q101-qualified SMT package, enabling compact, automotive-compliant designs without compromising clamping performance or manufacturability.
Availability
1.5SMC39AH is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, and telecom DC power feeds requiring stable component supply and full AEC-Q101 traceability.
Supply support for 1.5SMC39AH 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 bipolar transistors.
The 1.5SMC series was developed specifically for high-reliability automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust SMT manufacturability in DO-214AB packaging.
FAQ
What is the breakdown voltage range for the 1.5SMC39AH?
The 1.5SMC39AH has a specified breakdown voltage (VBR) range of 37.1V to 41.0V at 1mA test current, measured per ANSI/IEEE C62.35 standards. This tight tolerance ensures consistent clamping onset across production lots and supports precise overvoltage margin design in 24V and 36V systems where the 1.5SMC39AH is commonly deployed.
Is the 1.5SMC39AH suitable for automotive applications?
Yes, the 1.5SMC39AH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements-making it suitable for front-end protection in automotive ECUs, body control modules, and infotainment power supplies. Its DO-214AB package, 150°C junction rating, and glass-passivated junction support under-hood deployment where the 1.5SMC39AH operates reliably.
What is the maximum clamping voltage of the 1.5SMC39AH under surge conditions?
The 1.5SMC39AH exhibits a maximum clamping voltage (VC) of 53.9V at 29A peak impulse current (IPPM) using the standardized 10/1000μs waveform. This value is guaranteed across temperature and lifetime, ensuring downstream components see no more than 53.9V during worst-case transients-critical for protecting 40V-rated DC-DC controllers used with the 1.5SMC39AH.
Does the 1.5SMC39AH have bidirectional capability?
No, the 1.5SMC39AH is a unidirectional TVS diode intended for DC line protection with defined anode-to-cathode polarity. For bidirectional AC or dual-rail protection, Taiwan Semiconductor offers the 1.5SMC39CAH variant; the 1.5SMC39AH must be oriented correctly in-circuit with cathode toward the protected line to function as designed.
What packaging and reel quantity is available for the 1.5SMC39AH?
1.5SMC39AH is supplied in DO-214AB (SMC) package on 3,000-piece tape-and-reel format per industry standard. The reel complies with EIA-481-D specifications and includes matte tin-plated leads certified to J-STD-002 for solderability-ensuring compatibility with high-speed pick-and-place equipment used in production of boards incorporating the 1.5SMC39AH.
1.5SMC39AH 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 29A
- 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)
1.5SMC39AH FAQ
1.How can I place an order for 1.5SMC39AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39AH 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 1.5SMC39AH reliable?
The price and inventory of 1.5SMC39AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC39AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39AH?
1.5SMC39AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39AH 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 1.5SMC39AH?
For technical support, including 1.5SMC39AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39AH requirements.
6.How does Aetrix verify that 1.5SMC39AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39AH 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 1.5SMC39AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC39AH?
All 1.5SMC39AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39AH, 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 1.5SMC39AH part is unused and in its original packaging.
Return procedure for 1.5SMC39AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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