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Vishay General Semiconductor - Diodes Division TPSMA27AHE3/5AT
- Part No.:
- TPSMA27AHE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA27AHE3/5AT.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,592
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Product details
Overview
TPSMA27AHE3/5AT from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor in SMA (DO-214AC) package, rated for 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 37.5 V clamping voltage (VC) at 10.7 A peak pulse current, and 400 W peak pulse power (10/1000 µs). It operates up to +185 °C junction temperature and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the TPSMA27AHE3/5AT datasheet, TPSMA27AHE3/5AT pinout, TPSMA27AHE3/5AT application, or TPSMA27AHE3/5AT equivalent, key selection criteria include unidirectional polarity, 23.1 V stand-off voltage (VWM), low 1.0 µA reverse leakage at VWM, 3.5 V max forward voltage at 25 A, and MSL Level 1 reflow compatibility.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with optimized junction passivation for high reliability under thermal stress. Its 185 °C maximum junction temperature enables operation in under-hood automotive environments and industrial power supply rails where sustained ambient temperatures exceed 125 °C.
The device delivers precise clamping performance with a typical VBR temperature coefficient of 0.087 %/°C and exhibits very fast response time (<1 ns) to transients induced by inductive switching or ESD events. It meets JESD22-B102 solderability and JESD201 Class 2 whisker resistance requirements.
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 overvoltage threshold triggering point |
| VWM | 23.1 V - maximum continuous reverse working voltage before leakage rises significantly |
| VC @ IPPM | 37.5 V at 10.7 A - clamped voltage during 400 W transient, limiting downstream IC stress |
| PPPM | 400 W (10/1000 µs) - surge energy handling capacity for lightning and load-switching transients |
| TJ max. | +185 °C - supports high-temperature automotive and industrial PCB layouts without derating |
| Polarity | Unidirectional - protects against positive-going transients only; cathode band denotes terminal |
| MSL Level | Level 1 (J-STD-020) - allows unlimited floor life and single reflow at 260 °C peak |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, matte tin-plated leads, UL 94 V-0 molding compound. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VWM exceeded |
| Anode | Reference/return path | Typically tied to system ground; completes clamping path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| 185 °C junction rating | Enables placement near heat sources (e.g., power MOSFETs, DC-DC converters) without thermal shutdown risk |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges on 50 Ω source impedance lines |
| MSL Level 1 compliance | Eliminates bake-out requirement and supports standard SMT assembly without moisture sensitivity concerns |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs, body control modules, and lighting drivers from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive spikes above 23.1 V. Use Value: Limits peak rail voltage to ≤37.5 V during 10.7 A surge, preventing damage to 36 V-rated CAN transceivers and microcontrollers. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt ESD and inductive kickback from solenoid actuation. Use Value: Clamps transients within <1 ns while maintaining <1.0 µA leakage at 23.1 V, preserving signal integrity of mV-level sensor outputs. |
| Telecom DC Power Input Protection | Consumer USB-C Power Delivery Interface |
Use Scenario: Guarding -48 V telecom rectifier outputs against lightning-induced surges on outdoor cabinet feeds. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to negative rail, clamping positive transients toward return path. Use Value: Withstands repetitive 400 W pulses at 0.01% duty cycle, meeting GR-1089-CORE surge immunity requirements. | Use Scenario: Secondary-level overvoltage protection on USB-C VBUS lines after primary buck-boost regulation. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing residual 20 V+ transients that bypass upstream protection. Use Value: 23.1 V VWM ensures no conduction during normal 20 V PD operation; 37.5 V VC prevents damage to 28 V-rated port controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A | Same VBR range (25.7–28.4 V), but SMB (DO-214AA) package - 2.5 mm wider, higher thermal mass | Lower power density; requires larger PCB area; better thermal dissipation in high-duty-cycle scenarios | Select when board space permits and long-duration surge handling (>100 ms) is prioritized over footprint |
| 1.5SMC27A | Same electrical specs, but SMC (DO-214AB) package - 7.1 mm x 6.2 mm, 1.5 W steady-state rating vs. 1.0 W | Higher PD (1.5 W) enables use in higher ambient temperature zones without derating | Choose for industrial motor drives where sustained 125 °C ambient requires >1.0 W continuous dissipation margin |
Compared with SMBJ27A and 1.5SMC27A, the TPSMA27AHE3/5AT offers the smallest footprint (SMA) while maintaining identical VBR, VC, and PPPM; its 1.0 W PD and MSL Level 1 make it optimal for compact, high-volume automotive modules where reflow compatibility and space constraints dominate.
Availability
TPSMA27AHE3/5AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom DC input surge suppression requiring stable component supply across production lifecycles.
Supply support for TPSMA27AHE3/5AT 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The TPSMA27AHE3/5AT belongs to Vishay's PAR® (Protected Anisotropic Rectifier) TVS family, engineered specifically for robust transient suppression in harsh environments where AEC-Q101 qualification and 185 °C operation are mandatory.
FAQ
What is the maximum clamping voltage of the TPSMA27AHE3/5AT under specified test conditions?
The TPSMA27AHE3/5AT has a maximum clamping voltage (VC) of 37.5 V when subjected to a 10.7 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C with the device mounted on 0.2" × 0.2" copper pads. The clamping performance ensures downstream components see limited overvoltage stress during surge events, making TPSMA27AHE3/5AT suitable for protecting 24 V systems with 36 V-rated ICs.
Is the TPSMA27AHE3/5AT qualified for automotive applications?
Yes, the TPSMA27AHE3/5AT is AEC-Q101 qualified, as confirmed by Vishay's documentation for the HE3 suffix variant. It undergoes stress testing including high-temperature reverse bias, temperature cycling, and ESD per JEDEC standards. Its 185 °C maximum junction temperature and MSL Level 1 rating further support use in engine control units, body electronics, and ADAS modules where TPSMA27AHE3/5AT provides certified transient protection.
What does the "HE3" suffix indicate in TPSMA27AHE3/5AT?
The "HE3" suffix in TPSMA27AHE3/5AT denotes a RoHS-compliant, AEC-Q101 qualified version with matte tin-plated leads, JESD201 Class 2 whisker resistance, and compliance with J-STD-002 solderability. The "/5AT" denotes packaging in 7" diameter tape-and-reel with 1800 units per reel. This configuration ensures TPSMA27AHE3/5AT meets automotive supply chain traceability and process reliability requirements.
How does the TPSMA27AHE3/5AT differ from bidirectional TVS diodes?
The TPSMA27AHE3/5AT is unidirectional, meaning it clamps only positive-going transients relative to its cathode terminal and behaves like a rectifier under forward bias. Unlike bidirectional variants, it does not suppress negative transients - requiring separate design consideration for AC-coupled or bipolar signal lines. This makes TPSMA27AHE3/5AT ideal for DC power rails and single-polarity signal paths where cost and leakage performance are prioritized.
What is the standoff voltage (VWM) and why is it critical for TPSMA27AHE3/5AT selection?
The standoff voltage (VWM) of the TPSMA27AHE3/5AT is 23.1 V - the maximum continuous reverse voltage it can block without significant leakage. This parameter ensures the device remains non-conductive during normal 24 V system operation while still triggering reliably above this threshold. Selecting TPSMA27AHE3/5AT with VWM ≥110% of nominal rail voltage avoids false triggering and maintains low leakage (<1.0 µA), which is essential for battery-powered and low-power sensor nodes.
TPSMA27AHE3/5AT 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 10.7A
- 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)
TPSMA27AHE3/5AT FAQ
1.How can I place an order for TPSMA27AHE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA27AHE3/5AT 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 TPSMA27AHE3/5AT reliable?
The price and inventory of TPSMA27AHE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA27AHE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA27AHE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA27AHE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA27AHE3/5AT?
TPSMA27AHE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA27AHE3/5AT 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 TPSMA27AHE3/5AT?
For technical support, including TPSMA27AHE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA27AHE3/5AT requirements.
6.How does Aetrix verify that TPSMA27AHE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA27AHE3/5AT 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 TPSMA27AHE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA27AHE3/5AT?
All TPSMA27AHE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA27AHE3/5AT, 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 TPSMA27AHE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA27AHE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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