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Vishay General Semiconductor - Diodes Division TPSMA27A-3HE3_B/I
- Part No.:
- TPSMA27A-3HE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA27A-3HE3_B/I.pdf
- Description:
- TVS DIODE 400W SMA DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,079
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Product details
Overview
TPSMA27A-3HE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. 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), 185 °C max junction temperature, and AEC-Q101 qualification - used in automotive sensor protection and industrial power rail surge suppression.
For engineers reviewing the TPSMA27A-3HE3_B/I datasheet, TPSMA27A-3HE3_B/I pinout, TPSMA27A-3HE3_B/I application, or TPSMA27A-3HE3_B/I equivalent, key selection criteria include unidirectional polarity, 23.1 V stand-off voltage (VWM), low 1.0 µA reverse leakage at VWM, TJ = 185 °C capability, and RoHS-compliant HE3 suffix with MSL Level 1 rating.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, triggering when reverse voltage exceeds its 25.7–28.4 V breakdown range (VBR at 1 mA). Its fast response time and low incremental surge resistance enable effective suppression of 10/1000 µs transients up to 400 W without thermal runaway.
The device uses passivated anisotropic rectifier technology and is rated for continuous operation from –65 °C to +185 °C. Its unidirectional configuration supports DC-biased lines such as automotive 12 V and 24 V supply rails, and it meets 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 - defines precise clamping onset threshold at 1 mA test current |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage rises above 1.0 µA |
| VC @ IPPM | 37.5 V - clamped voltage during 10.7 A 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 400 W - peak transient power handling capacity under standard waveform, derated above 25 °C |
| TJ max. | +185 °C - enables use in high-temperature under-hood automotive environments without derating |
| Polarity | Unidirectional - suitable only for DC-biased lines where forward conduction is acceptable |
| AEC-Q101 | Qualified - validated for automotive reliability per stress test requirements (HTOL, TC, HAST, etc.) |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded case with UL 94 V-0 flammability rating; matte tin-plated leads, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side of protected line; conducts during surge clamp in reverse mode |
| Cathode | Current exit terminal in forward bias; marked with band | Connected to higher-potential side (e.g., VCC rail); determines unidirectional clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design ensures stable VBR over lifetime and temperature |
| High-temperature capability | TJ = 185 °C allows placement near heat sources in automotive ECUs without derating |
| Peak pulse power | 400 W (10/1000 µs) provides robust protection against ISO 7637-2 Pulse 1/2a/5a transients |
| Low clamping ratio | VC/VBR ≈ 1.39 enables tight margin between VWM and VC, minimizing overvoltage exposure |
| MSL Level 1 | Reflow-compatible up to 260 °C peak, eliminating pre-bake requirements for high-volume SMT assembly |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role: Parallel-connected transient shunt that clamps voltage excursions above 23.1 V while maintaining low leakage during normal operation. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface ICs by limiting transient voltage to ≤37.5 V at 10.7 A. | Use Scenario: Safeguarding 24 V DC input stages of PLC modules and motor drives against lightning-induced surges and relay contact bounce. IC Role / Device Role: Standoff-rated TVS placed across input terminals to divert surge energy to ground before reaching upstream regulators or controllers. Use Value: Enables compliance with IEC 61000-4-5 Level 3 (1 kV/2 kV) surge immunity with no additional series impedance required. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters for smart home hubs and IoT gateways exposed to mains-borne transients. IC Role / Device Role: Unidirectional clamping element on regulated 12 V output rail to absorb coupling from primary-side transients. Use Value: Maintains <1.0 µA leakage at 23.1 V, avoiding standby power penalty while delivering 400 W surge absorption. | Use Scenario: Surge protection on low-voltage DC feeds (e.g., 48 V PoE-derived rails) powering base station RF front-end modules. IC Role / Device Role: Fast-response shunt device placed at board edge to clamp ESD and surge events before they propagate into sensitive RF ICs. Use Value: Achieves sub-nanosecond response and 37.5 V clamping to protect GaN amplifiers rated for ≤40 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ27A | Same SMA package, 27 V VBR, but 400 W PPPM at 1.0 ms (vs. 10/1000 µs); slightly higher VC = 43.0 V | Lacks AEC-Q101 qualification; not rated for automotive under-hood use | Select SMAJ27A only for cost-sensitive industrial or consumer designs where automotive qualification is unnecessary |
| TPSMA27CA | Bi-directional variant (VBR ±27 V); same package, PPPM, and AEC-Q101 status | Supports AC-coupled or bipolar signal lines (e.g., RS-485, audio); not suitable for DC rails with defined polarity | Choose TPSMA27CA only when protecting symmetrical signals requiring bidirectional clamping |
Compared with SMAJ27A and TPSMA27CA, the TPSMA27A-3HE3_B/I offers automotive-grade reliability and optimal clamping performance for unidirectional 24 V systems, with tighter VC and verified MSL Level 1 process compatibility - making it preferred for high-volume automotive electronics manufacturing.
Availability
TPSMA27A-3HE3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC power inputs, and telecom DC feed protection requiring stable component supply, AEC-Q101 validation, and long-term production continuity.
Supply support for TPSMA27A-3HE3_B/I 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 qualification.
The TPSMA27A-3HE3_B/I belongs to Vishay's PAR® family of high-power TVS diodes, engineered specifically for harsh-environment transient suppression in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the exact breakdown voltage range for TPSMA27A-3HE3_B/I?
The TPSMA27A-3HE3_B/I has a guaranteed breakdown voltage (VBR) range of 25.7 V to 28.4 V at 1.0 mA test current, with a nominal value of 27.0 V. This specification is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 23-Jan-2024 (Document Number: 88405). The TPSMA27A-3HE3_B/I maintains this tolerance across its qualified operating temperature range.
Does TPSMA27A-3HE3_B/I support automotive applications?
Yes, the TPSMA27A-3HE3_B/I is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood automotive applications including engine control units, body electronics, and ADAS sensor modules. Its HE3 suffix confirms RoHS compliance and qualification per the full AEC-Q101 stress test suite - a requirement explicitly met by the TPSMA27A-3HE3_B/I.
What is the clamping voltage of TPSMA27A-3HE3_B/I at its rated surge current?
The TPSMA27A-3HE3_B/I exhibits a maximum clamping voltage (VC) of 37.5 V at its peak pulse current (IPPM) of 10.7 A, tested with the standard 10/1000 µs waveform. This value is critical for ensuring downstream components remain within safe operating voltage limits during surge events - a key parameter specified for the TPSMA27A-3HE3_B/I in its official electrical characteristics table.
Is TPSMA27A-3HE3_B/I unidirectional or bidirectional?
The TPSMA27A-3HE3_B/I is strictly unidirectional, as confirmed by Vishay's datasheet and ordering nomenclature ('A' suffix denotes unidirectional; 'CA' would indicate bidirectional). Its cathode band marks the high-side terminal, and it conducts only when reverse-biased beyond VBR. This polarity is integral to the TPSMA27A-3HE3_B/I's function in DC power rail protection.
What packaging and moisture sensitivity level does TPSMA27A-3HE3_B/I have?
The TPSMA27A-3HE3_B/I is supplied in 13" diameter plastic tape and reel (package code 'I') with 7500 units per reel, and is rated MSL Level 1 per J-STD-020 - meaning it can withstand reflow soldering up to 260 °C peak temperature without baking. This MSL Level 1 rating applies specifically to the TPSMA27A-3HE3_B/I and is documented in Vishay's mechanical data section.
TPSMA27A-3HE3_B/I 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)
TPSMA27A-3HE3_B/I FAQ
1.How can I place an order for TPSMA27A-3HE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA27A-3HE3_B/I 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 TPSMA27A-3HE3_B/I reliable?
The price and inventory of TPSMA27A-3HE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA27A-3HE3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA27A-3HE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA27A-3HE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA27A-3HE3_B/I?
TPSMA27A-3HE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA27A-3HE3_B/I 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 TPSMA27A-3HE3_B/I?
For technical support, including TPSMA27A-3HE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA27A-3HE3_B/I requirements.
6.How does Aetrix verify that TPSMA27A-3HE3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA27A-3HE3_B/I 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 TPSMA27A-3HE3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA27A-3HE3_B/I?
All TPSMA27A-3HE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA27A-3HE3_B/I, 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 TPSMA27A-3HE3_B/I part is unused and in its original packaging.
Return procedure for TPSMA27A-3HE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA27A-3HE3_B/I Tags
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