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Vishay General Semiconductor - Diodes Division TPSMA27AHE3_B/H
- Part No.:
- TPSMA27AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA27AHE3_B/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPSMA27AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive switching transients and lightning-induced surges. It features a 27.0 V nominal breakdown voltage (VBR), 37.5 V maximum clamping voltage (VC) at 10.7 A peak pulse current, 400 W peak pulse power (10/1000 μs), and operates up to +185 °C junction temperature - deployed in automotive sensor signal lines and industrial I/O protection.
For engineers reviewing the TPSMA27AHE3_B/H datasheet, TPSMA27AHE3_B/H pinout, TPSMA27AHE3_B/H application, or TPSMA27AHE3_B/H equivalent, key selection criteria include unidirectional polarity, SMA (DO-214AC) package compatibility, AEC-Q101 qualification status, TJ = 185 °C thermal rating, and 37.5 V clamping performance under 10.7 A surge.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with junction passivation optimized for high-reliability operation. Its unidirectional configuration provides low-leakage reverse blocking up to 23.1 V stand-off voltage (VWM) and fast response to transient events without triggering during normal operation.
The device is rated for 400 W peak pulse power per 10/1000 μs waveform at 0.01 % duty cycle and exhibits 0.087 %/°C temperature coefficient of VBR, enabling stable clamping across automotive-grade temperature ranges (−65 °C to +185 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 25.7 V / 27.0 V / 28.4 V - ensures reliable turn-on above system operating voltage while avoiding false triggering |
| VWM | 23.1 V - maximum continuous reverse voltage before leakage exceeds 1 μA at 25 °C |
| VC @ IPPM | 37.5 V - clamps 10.7 A surge to safe levels for downstream ICs like microcontrollers or CAN transceivers |
| PPPM | 400 W - handles standard 10/1000 μs lightning-surge waveforms per IEC 61000-4-5 |
| TJ max. | +185 °C - supports under-hood automotive applications and high-temperature industrial environments |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct cathode orientation on PCB |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current return path | Connected to ground or low-impedance reference; carries full surge current during clamping |
| Cathode | Clamping node | Connected to protected line (e.g., sensor output); defines VWM and VBR thresholds |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, and HAST |
| MSL Level 1 | Reflow-compatible up to 260 °C peak without moisture sensitivity concerns |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time) |
| High reliability at TJ = 185 °C | Enables use in engine control units, battery management systems, and motor drive feedback circuits |
| 400 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly mounted on 5 mm × 5 mm copper pads |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog outputs of pressure/temperature sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between sensor output and ECU input. Use Value: Limits transient voltage to ≤37.5 V during 10.7 A surges, preserving ADC input integrity and preventing latch-up in connected microcontrollers. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controller (PLC) backplanes against field-wiring induced transients. IC Role / Device Role / Timing Role: Standoff protector on each input channel, operating below 23.1 V DC bias while responding within <1 ns to spikes. Use Value: Maintains functional safety compliance (IEC 61000-4-4/5) without adding series impedance or affecting signal timing in 1 ms scan-cycle systems. |
| Telecom Line Interface | Consumer Power Adapter Feedback Path |
Use Scenario: Shielding RS-485 transceiver data lines in outdoor telecom cabinets subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Differential-line TVS pair (one per line) referenced to local ground, leveraging unidirectional behavior for asymmetrical threat profiles. Use Value: Clamps common-mode transients to <40 V while preserving signal integrity up to 10 Mbps due to low capacitance (<100 pF at zero bias). | Use Scenario: Securing optocoupler feedback path in isolated AC/DC adapters where primary-side transients could disrupt regulation loop stability. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA at 23.1 V) standoff protector on secondary-side bias rail feeding TL431 reference. Use Value: Prevents false overvoltage shutdown during 100 ns–1 μs transients while maintaining <0.1 % regulation error under steady-state conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A | 28.0 V nominal VBR, 45.4 V VC @ 8.8 A, same SMA package, non-AEC-Q101 | Lacks automotive qualification; higher clamping voltage reduces margin for 3.3 V/5 V logic protection | Acceptable for industrial/commercial designs where AEC-Q101 is not mandated |
| TPSMA27AHE3_B/I | Identical electrical specs; differs only in tape-and-reel packaging (7500 pcs vs. 1800 pcs per reel) | No functional difference; selection driven by production volume and SMT line feed requirements | Preferred for high-volume automated assembly where larger reels reduce changeover frequency |
Compared with SMAJ28A and TPSMA27AHE3_B/I, the TPSMA27AHE3_B/H offers tighter VBR tolerance (±4.7 %), lower clamping voltage (37.5 V vs. 45.4 V), and guaranteed AEC-Q101 qualification - making it optimal for automotive signal-line protection where thermal robustness and failure-mode predictability are critical.
Availability
TPSMA27AHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPSMA27AHE3_B/H 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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive-grade qualification.
The TPSMAxxA family is engineered for high-energy transient suppression in harsh environments, targeting applications demanding AEC-Q101 compliance, 185 °C operation, and precise clamping behavior - especially in vehicle electrification and industrial automation systems.
FAQ
What is the maximum clamping voltage of the TPSMA27AHE3_B/H under specified surge conditions?
The TPSMA27AHE3_B/H has a maximum clamping voltage (VC) of 37.5 V when subjected to its rated 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 TPSMA27AHE3_B/H maintains this clamping performance across its full operating temperature range, supporting robust protection of 3.3 V, 5 V, and 24 V interface circuits.
Is the TPSMA27AHE3_B/H qualified for automotive applications?
Yes, the TPSMA27AHE3_B/H is AEC-Q101 qualified, as confirmed by Vishay's documentation for base P/NHE3 variants. It undergoes stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and highly accelerated stress test (HAST) to meet automotive reliability standards. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101 qualified construction, making the TPSMA27AHE3_B/H suitable for engine control, ADAS sensor interfaces, and body electronics.
What does the "B/H" suffix in TPSMA27AHE3_B/H indicate?
The "B/H" suffix in TPSMA27AHE3_B/H specifies the revision code ("B") and preferred package code ("H"). "H" denotes 7-inch diameter plastic tape-and-reel packaging containing 1800 units per reel. The "B" revision reflects the latest manufacturing iteration per Vishay document 88405 (Rev. 23-Jan-2024), incorporating validated process improvements without electrical or mechanical specification changes from prior revisions.
How does the TPSMA27AHE3_B/H compare to bidirectional TVS diodes in surge protection design?
The TPSMA27AHE3_B/H is unidirectional and therefore suited only for protecting DC-biased lines against positive-going transients. Unlike bidirectional TVS diodes, it provides lower leakage current (<1 μA at 23.1 V) and avoids clamping during negative excursions - advantageous in single-supply sensor outputs or regulated feedback paths. Designers must ensure correct cathode orientation; reversing polarity renders the TPSMA27AHE3_B/H ineffective for transient suppression.
What is the thermal derating behavior of the TPSMA27AHE3_B/H above 25 °C ambient?
The TPSMA27AHE3_B/H follows standard derating curves per Figure 2 in Vishay document 88405: peak pulse power decreases linearly from 400 W at 25 °C to approximately 200 W at 125 °C ambient, with full capability retained up to TJ = 185 °C. Derating is based on junction temperature, not ambient alone; proper PCB copper area (minimum 5 mm × 5 mm per pad) is required to maintain thermal performance. The TPSMA27AHE3_B/H's 0.087 %/°C VBR tempco ensures predictable clamping shift across temperature.
TPSMA27AHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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_B/H FAQ
1.How can I place an order for TPSMA27AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA27AHE3_B/H 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_B/H reliable?
The price and inventory of TPSMA27AHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA27AHE3_B/H is usually 5 days.
3.What payment methods are accepted for TPSMA27AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA27AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA27AHE3_B/H?
TPSMA27AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA27AHE3_B/H 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_B/H?
For technical support, including TPSMA27AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA27AHE3_B/H requirements.
6.How does Aetrix verify that TPSMA27AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All TPSMA27AHE3_B/H 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_B/H meets industry standards.
7.What is the process for return or replacement of TPSMA27AHE3_B/H?
All TPSMA27AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA27AHE3_B/H, 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_B/H part is unused and in its original packaging.
Return procedure for TPSMA27AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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