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Vishay General Semiconductor - Diodes Division TPSMA27AHM3_B/I
- Part No.:
- TPSMA27AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA27AHM3_B/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,696
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Product details
Overview
TPSMA27AHM3_B/I 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 IT = 1.0 mA), 37.5 V clamping voltage (VC) at 10.7 A peak pulse current, and 400 W peak pulse power (10/1000 μs). It delivers automotive-grade reliability with AEC-Q101 qualification, 185 °C max junction temperature, and halogen-free RoHS compliance - deployed to protect MOSFETs and sensor signal lines in automotive powertrain control modules.
For engineers reviewing the TPSMA27AHM3_B/I datasheet, TPSMA27AHM3_B/I pinout, TPSMA27AHM3_B/I application, or TPSMA27AHM3_B/I equivalent, key selection criteria include verified unidirectional clamping performance under 10/1000 μs transients, TJ = 185 °C thermal capability for under-hood environments, AEC-Q101 qualification status, and SMA package compatibility with high-density PCB layouts requiring MSL Level 1 reflow.
Technical Context
This device operates as a unidirectional avalanche diode, leveraging passivated anisotropic rectifier technology to achieve stable breakdown behavior across -65 °C to +185 °C. Its clamping response is optimized for fast transient suppression (<1 ns typical response time), with low incremental surge resistance ensuring minimal voltage overshoot during 10.7 A IPPM events.
The TPSMA27AHM3_B/I is designed for single-pulse and low-duty-cycle (0.01 %) repetitive surge conditions per IEC 61000-4-5, with thermal derating defined up to TJ = 185 °C and validated on standard 5.0 mm × 5.0 mm copper pads. It meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 25.7 V / 27.0 V / 28.4 V at IT = 1.0 mA - defines precise avalanche initiation threshold for consistent overvoltage triggering |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA at 25 °C |
| 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 waveform) - peak surge energy handling capacity under standardized lightning/inductive-switching test |
| TJ max | +185 °C - enables operation in high-temperature automotive zones without derating loss |
| AEC-Q101 | Qualified - certified for automotive electronic systems per stress-test requirements including HTGB, H3TRB, and TCT |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with cathode band marking and 0.208" body length |
Pinout & Package
SMA (DO-214AC) package: molded plastic case with matte tin-plated leads, cathode indicated by color band; compliant with UL 94 V-0, MSL Level 1, and J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side reference; conducts during forward-biased ESD events |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., CAN_H, LIN, sensor VOUT); sinks surge current into ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Passivated anisotropic rectifier technology | Enables stable VBR tolerance (±5 %) and low parametric drift over temperature and lifetime |
| 185 °C junction rating | Supports placement near heat sources (e.g., power inverters, engine controllers) without thermal shutdown or parameter shift |
| 400 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges without failure |
| Halogen-free, RoHS-compliant construction | Fulfills automotive OEM material compliance mandates (e.g., GMW3172, Ford WSS-M99P9999-A1) |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
Applications
| Automotive Powertrain Control | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails and microcontroller I/O pins in engine control units exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp transients above 27 V while maintaining low leakage below 23.1 V. Use Value: Prevents latch-up or permanent damage to MCU and driver ICs during ISO 16750-2 load-dump events (up to 35 V, 400 ms), enabled by 37.5 V clamping at 10.7 A. | Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLC modules from EFT and surge coupling. IC Role / Device Role / Timing Role: TVS connected across sensor VOUT–GND to absorb 4 kV EFT bursts (IEC 61000-4-4) and 1 kV surges (IEC 61000-4-5). Use Value: Maintains signal integrity below ±0.5 % error by limiting transient-induced offset, supported by <1 ns response and 37.5 V clamping ceiling. |
| Automotive Body Electronics | Telecom Interface Protection |
Use Scenario: Safeguarding LIN bus transceivers in door module ECUs against battery reverse connection and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS installed between LIN line and ground to clamp negative transients and positive spikes up to 37.5 V. Use Value: Ensures uninterrupted LIN communication (up to 20 kbps) during 12 V battery reversal tests and solenoid switching noise, validated per AEC-Q101. | Use Scenario: Protecting RS-485 transceiver inputs in base station remote radio units from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: TVS placed on differential pair (A/B) referenced to local ground to suppress common-mode transients exceeding 23.1 V. Use Value: Preserves data integrity during 10/700 μs telecom surges (IEC 61000-4-5 Level 3) by limiting clamped voltage to 37.5 V, avoiding receiver saturation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ27AHE3_A/H | Same VBR range (25.7–28.4 V), identical SMA package, but HE3 suffix indicates RoHS/AEC-Q101 without halogen-free claim | Acceptable where halogen-free is not mandated; same thermal and surge ratings | Select SMAJ27AHE3_A/H if halogen-free compliance is not required and 7" tape-and-reel delivery suffices |
| TPSMA27AHM3_B/H | Identical electrical specs and AEC-Q101/halogen-free qualification; differs only in packaging - 7" reel (H) vs. 13" reel (I) | No functional difference; choice driven solely by production line feeder compatibility and volume order size | Choose TPSMA27AHM3_B/H when using 7" tape feeders or ordering ≤1800 units per reel |
Compared with SMAJ27AHE3_A/H and TPSMA27AHM3_B/H, the TPSMA27AHM3_B/I offers identical protection performance and automotive qualification, with the sole distinction being its 13" tape-and-reel packaging (7500 units/reel) optimized for high-volume SMT lines requiring extended run time between reel changes.
Availability
TPSMA27AHM3_B/I is available at Aetrix Electronics and suitable for automotive powertrain control, industrial sensor interface protection, and telecom infrastructure surge hardening requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for TPSMA27AHM3_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, TVS, and optoelectronics with emphasis on high-reliability, automotive-qualified components.
The TPSMA series belongs to Vishay's PAR® transient voltage suppressor product line, engineered specifically for robust, high-temperature surge protection in automotive and industrial environments where AEC-Q101 compliance and 185 °C operation are mandatory.
FAQ
What is the breakdown voltage tolerance of the TPSMA27AHM3_B/I?
The TPSMA27AHM3_B/I has a breakdown voltage VBR of 25.7 V minimum to 28.4 V maximum at test current IT = 1.0 mA, yielding a ±5 % tolerance around the nominal 27.0 V rating. This tight tolerance ensures predictable clamping onset across production lots and temperature ranges, critical for protecting sensitive 24 V automotive electronics where overvoltage margins are constrained.
Is the TPSMA27AHM3_B/I qualified for automotive use?
Yes, the TPSMA27AHM3_B/I is AEC-Q101 qualified and carries the HM3 suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It passes all required stress tests including high-temperature reverse bias (HTGB), unbiased highly accelerated temperature-humidity bias (UHAST), and temperature cycling (TCT), making it suitable for under-hood and body-control module applications per OEM specifications.
What is the clamping voltage of the TPSMA27AHM3_B/I at its rated peak pulse current?
The TPSMA27AHM3_B/I exhibits a maximum clamping voltage VC of 37.5 V at its rated peak pulse current IPPM = 10.7 A (10/1000 μs waveform). This value is measured under standardized test conditions with 5.0 mm × 5.0 mm copper pads and confirms effective voltage limiting during surge events, preventing downstream ICs from exceeding absolute maximum ratings.
Does the TPSMA27AHM3_B/I have a unidirectional or bidirectional configuration?
The TPSMA27AHM3_B/I is strictly unidirectional, as confirmed in the Vishay datasheet under FEATURES and PRIMARY CHARACTERISTICS. It functions as a single-junction avalanche diode with cathode-band polarity marking, intended for DC-biased lines such as 12 V/24 V rails, LIN buses, or sensor outputs - not for AC or bipolar signal paths requiring symmetrical clamping.
What is the maximum operating junction temperature for the TPSMA27AHM3_B/I?
The TPSMA27AHM3_B/I supports a maximum junction temperature TJ of +185 °C, validated per JEDEC standards and specified in both MAXIMUM RATINGS and MECHANICAL DATA sections. This rating enables reliable operation in high-ambient environments like engine compartments and power inverters, with thermal derating curves provided in Figure 2 of the datasheet for design margining.
TPSMA27AHM3_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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA27AHM3_B/I FAQ
1.How can I place an order for TPSMA27AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA27AHM3_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 TPSMA27AHM3_B/I reliable?
The price and inventory of TPSMA27AHM3_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 TPSMA27AHM3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA27AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA27AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA27AHM3_B/I?
TPSMA27AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA27AHM3_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 TPSMA27AHM3_B/I?
For technical support, including TPSMA27AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA27AHM3_B/I requirements.
6.How does Aetrix verify that TPSMA27AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA27AHM3_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 TPSMA27AHM3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA27AHM3_B/I?
All TPSMA27AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA27AHM3_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 TPSMA27AHM3_B/I part is unused and in its original packaging.
Return procedure for TPSMA27AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA27AHM3_B/I Tags
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