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Taiwan Semiconductor Corporation 1.5SMC39CAH
- Part No.:
- 1.5SMC39CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39CAH.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,118
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Product details
Overview
1.5SMC39CAH from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with breakdown voltage 37.1–41.0 V at 1 mA test current, clamping voltage 53.9 V at 29 A peak pulse current, and working stand-off voltage 33.3 V. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients and ESD.
For engineers reviewing the 1.5SMC39CAH datasheet, 1.5SMC39CAH pinout, 1.5SMC39CAH application, or 1.5SMC39CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, sub-1 ps response time, <1 µA leakage above 10 V, and compliance with ISO 7637-2 for automotive load-dump immunity.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast transient suppression in high-energy surge environments. Its bidirectional configuration enables symmetrical clamping on AC lines or differential signal paths without polarity sensitivity.
Designed for automotive-grade reliability, it meets AEC-Q101 stress tests and supports operation from −55 °C to +150 °C junction temperature, with thermal resistance RθJC = 15 °C/W and RθJA = 50 °C/W - critical for thermally constrained SMT layouts in engine control units and body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 37.1 V / 41.0 V at 1 mA - defines minimum and maximum guaranteed breakdown threshold under standardized test conditions |
| VWM | 33.3 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 53.9 V at 29 A - clamping voltage during 10/1000 µs surge, limiting downstream voltage stress |
| PPK | 1500 W - peak pulse power handling per single 10/1000 µs waveform, derated above 25 °C ambient |
| IR @ VWM | <1 µA - ultra-low leakage ensures minimal standby power loss in always-on circuits |
| TJ max | +150 °C - enables use in under-hood automotive modules without thermal derating penalties |
| Response time | <1.0 ps - ensures clamping activation before transient energy couples into sensitive ICs |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional, cathode band not applicable (symmetrical terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Transient current path | Either terminal accepts surge current in either polarity - no orientation required during placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, infotainment, and ADAS sensor interfaces |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) waveforms |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| Moisture sensitivity level 1 | Zero bake requirement before reflow - compatible with standard SMT assembly lines |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Distribution | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protection of 12 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail to clamp surges before they reach LDOs, MCUs, or gate drivers. Use Value: Limits rail voltage to ≤53.9 V during 29 A transients, preventing latch-up or oxide breakdown in 3.3 V/5 V logic. |
Use Scenario: Surge protection on CAN_H/CAN_L differential pair in factory automation nodes. IC Role / Device Role / Timing Role: Symmetrical clamping device connected between CAN_H and CAN_L to absorb common-mode transients. Use Value: Maintains signal integrity by suppressing >1 kV EFT bursts while adding <1 pF junction capacitance at 0 V bias. |
| Telecom DC Power Input | Consumer USB-C Power Delivery Port |
Use Scenario: Input-stage protection for PoE-powered switches and base station RF modules. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V DC input, upstream of DC-DC converters. Use Value: Absorbs 1500 W pulses without degradation, enabling compliance with IEC 61000-4-5 Level 4 (4 kV line-earth) |
Use Scenario: Overvoltage guard on USB-C VBUS line exposed to hot-plug and adapter fault conditions. IC Role / Device Role / Timing Role: Fast-acting shunt device that activates before internal PMIC OVP triggers. Use Value: Clamps VBUS to 53.9 V within <1 ps, protecting USB PD controllers rated for 20 V max absolute. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | 600 W rating, SMB package (smaller footprint), VC = 58.1 V @ 10.3 A | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 (load dump) | Select when board space is constrained and peak surge energy ≤600 W |
| 1.5KE39CA | Through-hole DO-201 package, same 1500 W rating, VC = 58.1 V @ 25.5 A | Not AEC-Q101 qualified; lacks ISO 7637-2 validation; incompatible with automated SMT lines | Select only for legacy through-hole designs where reflow compatibility is not required |
Compared with SMBJ36CA and 1.5KE39CA, the 1.5SMC39CAH delivers higher surge robustness in an AEC-Q101-qualified SMT package with superior thermal performance (RθJC = 15 °C/W), making it the preferred choice for new automotive and industrial designs requiring both reliability and manufacturability.
Availability
1.5SMC39CAH is available at Aetrix Electronics and suitable for automotive power management, industrial CAN bus protection, and telecom DC input stages requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC39CAH 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 high-reliability protection devices and power components.
The 1.5SMC series was developed specifically for AEC-Q101-compliant automotive transient suppression, targeting under-hood and chassis-mounted modules where high-power surge immunity and thermal stability are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC39CAH under a 10/1000 µs surge?
The 1.5SMC39CAH has a maximum clamping voltage (VC) of 53.9 V at 29 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable voltage limiting during automotive load-dump events. The 1.5SMC39CAH maintains this clamping performance across its full operating temperature range of −55 °C to +150 °C.
Is the 1.5SMC39CAH suitable for bidirectional signal line protection?
Yes - the 1.5SMC39CAH is explicitly designed for bidirectional operation, as indicated by the "CAH" suffix and confirmed in the datasheet's "Devices for Bipolar Applications" section. Its symmetrical VBR and VC characteristics in both directions make it ideal for protecting differential interfaces like CAN, RS-485, or Ethernet PHYs without polarity concerns. The 1.5SMC39CAH requires no orientation during placement on PCBs.
Does the 1.5SMC39CAH meet AEC-Q101 requirements for automotive use?
Yes, the 1.5SMC39CAH is AEC-Q101 qualified per the manufacturer's documentation and version B2207 datasheet. It undergoes stress testing for high-temperature operating life, temperature cycling, and mechanical shock - validating its suitability for engine control units, body control modules, and ADAS sensors. The 1.5SMC39CAH also complies with ISO 7637-2 Pulse 1/2a/2b/3a/3b, a key automotive system-level requirement.
What is the maximum leakage current of the 1.5SMC39CAH at its working voltage?
The 1.5SMC39CAH exhibits a maximum blocking leakage current (IR) of less than 1 µA at its working stand-off voltage (VWM) of 33.3 V, measured at 25 °C. This ultra-low leakage minimizes quiescent power loss in always-on systems such as automotive telematics or smart meter backup rails. The 1.5SMC39CAH maintains <10 µA leakage even at 150 °C junction temperature.
How does the 1.5SMC39CAH compare to unidirectional variants like 1.5SMC39CH?
The 1.5SMC39CAH differs from the unidirectional 1.5SMC39CH in having identical electrical characteristics in both directions - enabling use on AC-coupled or floating lines where polarity is undefined. While both share the same DO-214AB package and 1500 W rating, the 1.5SMC39CAH eliminates the need for cathode marking and orientation checks during assembly. The 1.5SMC39CAH is the recommended choice for differential bus protection, whereas 1.5SMC39CH suits DC rail-to-ground applications.
1.5SMC39CAH 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):
- 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)
1.5SMC39CAH FAQ
1.How can I place an order for 1.5SMC39CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39CAH 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 1.5SMC39CAH reliable?
The price and inventory of 1.5SMC39CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39CAH is usually 5 days.
3.What payment methods are accepted for 1.5SMC39CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39CAH?
1.5SMC39CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39CAH 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 1.5SMC39CAH?
For technical support, including 1.5SMC39CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39CAH requirements.
6.How does Aetrix verify that 1.5SMC39CAH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39CAH 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 1.5SMC39CAH meets industry standards.
7.What is the process for return or replacement of 1.5SMC39CAH?
All 1.5SMC39CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39CAH, 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 1.5SMC39CAH part is unused and in its original packaging.
Return procedure for 1.5SMC39CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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