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Vishay General Semiconductor - Diodes Division TPSMA27HE3/5AT
- Part No.:
- TPSMA27HE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA27HE3/5AT.pdf
- Description:
- TVS DIODE 21.8VWM 39.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,330
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Product details
Overview
TPSMA27HE3/5AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-reliability overvoltage protection. It features a 27 V nominal breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 37.5 V maximum clamping voltage (VC) at 10.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs and ICs in automotive power supply rails.
For engineers reviewing the TPSMA27HE3/5AT datasheet, TPSMA27HE3/5AT pinout, TPSMA27HE3/5AT application, or TPSMA27HE3/5AT equivalent, key selection criteria include its AEC-Q101 qualification, 185 °C junction temperature rating, unidirectional polarity, and compatibility with high-temperature PCB environments requiring robust ESD and surge immunity.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by transient overvoltage events, leveraging passivated anisotropic rectifier technology for stable avalanche conduction. Its 10.7 A peak pulse current (IPPM) at 37.5 V clamping ensures low let-through energy during 10/1000 µs surges, while the 0.087 %/°C temperature coefficient of VBR enables predictable performance across -65 °C to +185 °C operating range.
The device is optimized for single-polarity transient suppression in DC power lines and signal paths, with low incremental surge resistance and fast response time (<1 ns). It meets MSL Level 1 per J-STD-020, supports 260 °C lead-free reflow, and is qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 25.7 V / 27.0 V / 28.4 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 23.1 V - maximum continuous reverse working voltage before leakage exceeds 1 μA, setting safe DC bias limit |
| VC @ IPPM | 37.5 V at 10.7 A - clamping voltage limiting downstream component stress during 400 W transient events |
| PPPM | 400 W (10/1000 µs) - peak surge power handling capacity without failure under standardized lightning/inductive-spike test |
| TJ max. | +185 °C - enables operation in high-temperature automotive engine control units and industrial motor drives |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct cathode orientation in series with protected line |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm thermal pad layout for effective heat dissipation |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 solderability and JESD 22-B102 whisker testing (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VIN exceeds VBR |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping loop during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including engine control modules and body electronics |
| 185 °C junction temperature rating | Enables deployment in high-ambient-temperature environments without derating or thermal shutdown |
| 400 W peak pulse power (10/1000 µs) | Withstands repetitive lightning-induced surges in telecom and industrial power supplies |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot on protected ICs, reducing risk of latch-up or gate oxide damage |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, simplifying SMT manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Guarding |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontrollers and CAN transceivers from load-dump spikes up to 35 V in vehicle infotainment systems. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between power rail and ground, activated within nanoseconds of overvoltage onset. Use Value: Limits transient voltage to ≤37.5 V, preventing permanent damage to 5 V logic interfaces and ensuring ASIL-B functional safety compliance. | Use Scenario: Shielding analog output lines of pressure sensors in factory automation PLC I/O modules from ESD and relay-switching noise. IC Role / Device Role / Timing Role: Unidirectional shunt protector mounted adjacent to sensor connector, diverting fast transients before reaching ADC input stage. Use Value: Maintains signal integrity below ±10 mV error band during 8 kV contact ESD events, preserving measurement accuracy. |
| Telecom DC Power Input Stage | Consumer Device USB Port Surge Suppression |
Use Scenario: Safeguarding PoE-powered Ethernet switches against induced surges from nearby AC mains cabling in building infrastructure. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 48 V DC input bus, coordinated with upstream fuse and downstream DC-DC converter. Use Value: Absorbs 400 W surge energy without degradation, enabling >100,000 surge cycles per device lifetime. | Use Scenario: Adding secondary-level surge protection on USB VBUS line of smart home hubs exposed to user-handled cables. IC Role / Device Role / Timing Role: Low-capacitance TVS placed after common-mode choke, suppressing differential-mode transients entering via USB cable. Use Value: Clamps 15 kV air discharge to <30 V within 1 ns, preventing USB PHY latch-up and maintaining full-speed data transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ27A | Same SMA package, 27 V VBR, but rated for 400 W with 10/1000 µs waveform and 175 °C TJ max (not AEC-Q101 qualified) | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated | Select SMAJ27A if cost sensitivity outweighs automotive compliance requirements and ambient temperature stays below 175 °C |
| SMCJ27A | Higher 1500 W PPPM, same VBR, but larger SMC (DO-214AB) package with different thermal pad layout and mounting footprint | Requires PCB redesign due to 7.11 mm × 6.22 mm body vs. SMA's 4.93 mm × 3.99 mm; better for high-energy surge zones | Choose SMCJ27A only when system-level surge tests exceed 400 W and board space allows larger footprint |
Compared with SMAJ27A and SMCJ27A, the TPSMA27HE3/5AT uniquely combines AEC-Q101 qualification, 185 °C operation, and compact SMA packaging - making it the preferred choice for space-constrained automotive modules requiring long-term reliability under thermal stress.
Availability
TPSMA27HE3/5AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor guarding, and telecom DC input staging requiring stable component supply and traceable sourcing.
Supply support for TPSMA27HE3/5AT 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and high-temperature performance.
The TPSMA27HE3/5AT belongs to Vishay's PAR® family of transient voltage suppressors, engineered specifically for automotive-grade surge immunity and high-temperature stability in harsh-environment electronics.
FAQ
What is the exact breakdown voltage range for TPSMA27HE3/5AT?
The TPSMA27HE3/5AT has a guaranteed breakdown voltage range of 25.7 V to 28.4 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This specification is confirmed in the Vishay datasheet document 88405, revision 23-Jan-2024, Table on page 2. The nominal value is 27.0 V, and the device maintains this tolerance across its full operating temperature range.
Is TPSMA27HE3/5AT qualified for automotive applications?
Yes, TPSMA27HE3/5AT is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (document 88405, page 1, Features section). The HE3 suffix denotes RoHS-compliant and AEC-Q101 qualified construction, making it suitable for automotive powertrain, body control, and infotainment systems where reliability under thermal and electrical stress is critical.
What is the maximum clamping voltage of TPSMA27HE3/5AT at its rated peak pulse current?
The TPSMA27HE3/5AT exhibits a maximum clamping voltage (VC) of 37.5 V at its rated peak pulse current of 10.7 A, tested with a 10/1000 µs waveform. This value is specified in the Electrical Characteristics table (page 2 of document 88405) and represents the upper voltage limit imposed on protected circuitry during worst-case surge conditions.
Does TPSMA27HE3/5AT have unidirectional or bidirectional polarity?
TPSMA27HE3/5AT is unidirectional only, as confirmed in the Features section of the Vishay datasheet (page 1). It protects against positive-going transients on the cathode side and must be oriented with the banded end toward the protected line. Bidirectional variants (e.g., TPSMA27CA) are separate part numbers and not interchangeable with TPSMA27HE3/5AT.
What package type and moisture sensitivity level does TPSMA27HE3/5AT use?
TPSMA27HE3/5AT uses the SMA (DO-214AC) surface-mount package and is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This allows indefinite floor life and standard lead-free reflow without pre-baking, as documented in the Mechanical Data section (page 1 of document 88405).
TPSMA27HE3/5AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 21.8V
- Voltage - Breakdown (Min):
- 24.3V
- Voltage - Clamping (Max) @ Ipp:
- 39.1V
- Current - Peak Pulse (10/1000µs):
- 10.2A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA27HE3/5AT FAQ
1.How can I place an order for TPSMA27HE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA27HE3/5AT 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 TPSMA27HE3/5AT reliable?
The price and inventory of TPSMA27HE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA27HE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA27HE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA27HE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA27HE3/5AT?
TPSMA27HE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA27HE3/5AT 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 TPSMA27HE3/5AT?
For technical support, including TPSMA27HE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA27HE3/5AT requirements.
6.How does Aetrix verify that TPSMA27HE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA27HE3/5AT 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 TPSMA27HE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA27HE3/5AT?
All TPSMA27HE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA27HE3/5AT, 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 TPSMA27HE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA27HE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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