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Vishay General Semiconductor - Diodes Division TPSMP18AHM3_A/I
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- Part No.:
- TPSMP18AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP18AHM3_A/I.pdf
- Description:
- TVS DIODE 15.3VWM 25.5VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,622
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Product details
Overview
TPSMP18AHM3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the PAR® family, designed for high-reliability automotive and industrial overvoltage protection. It features a 17.1 V to 18.9 V breakdown voltage (VBR), 15.3 V stand-off voltage (VWM), 25.5 V clamping voltage (VC) at 15.9 A peak pulse current, 400 W peak pulse power (10/1000 µs), and AEC-Q101 qualification - deployed to protect sensor signal lines and drive transistors in engine control units.
For engineers reviewing the TPSMP18AHM3_A/I datasheet, TPSMP18AHM3_A/I pinout, TPSMP18AHM3_A/I application, or TPSMP18AHM3_A/I equivalent, key selection criteria include its DO-220AA (SMP) package, 185 °C junction rating, unidirectional polarity, low-profile 1.0 mm height, and MSL Level 1 reflow compatibility - critical for automotive-grade PCB layout and thermal reliability validation.
Technical Context
The TPSMP18AHM3_A/I operates as a silicon avalanche diode with passivated anisotropic rectifier technology, enabling fast response time (<1 ns) and low incremental surge resistance. Its junction passivation supports stable operation up to TJ = 185 °C, meeting stringent automotive under-hood thermal requirements.
It delivers precise clamping performance with VC = 25.5 V at IPPM = 15.9 A (10/1000 µs waveform), while maintaining VWM = 15.3 V and IR ≤ 1.0 µA at 25 °C - ensuring minimal leakage during normal operation and robust surge immunity during transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V - defines minimum voltage at which avalanche conduction begins reliably under 1 mA test current |
| VWM | 15.3 V - maximum reverse working voltage before significant leakage; ensures safe operation below system rail |
| VC @ IPPM | 25.5 V @ 15.9 A - clamped voltage during 10/1000 µs surge; determines protected IC's voltage stress limit |
| PPPM | 400 W - peak pulse power handling capacity; enables protection against ISO 7637-2 Pulse 1/2a/5a transients |
| TJ max. | 185 °C - extended junction temperature rating supports under-hood automotive placement without derating |
| Package | SMP (DO-220AA) - ultra-low-profile surface-mount package (1.0 mm typical height) optimized for automated assembly |
| AEC-Q101 | Qualified - certified for automotive electronic modules per stress test standard, including HTGB, HTRB, and TCT |
Pinout & Package
Package: SMP (DO-220AA) - molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, cathode indicated by color band. Dimensions: 3.61 mm × 2.18 mm × 1.0 mm (L × W × H), 5.0 mm × 5.0 mm copper pad layout recommended per datasheet fig. 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance return plane; forms low-inductance path for transient energy dissipation |
| Cathode | Protected line connection / surge input | Connected to signal or power line being protected; color band identifies this terminal on PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Enables stable 185 °C operation and long-term reliability in harsh automotive environments |
| Low profile (1.0 mm height) | Reduces board space and mechanical interference in tight enclosures such as ECU housings |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning or special handling |
| Unidirectional configuration | Provides asymmetric clamping ideal for DC-biased signal lines like CAN, LIN, or sensor outputs |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for downstream ICs |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protects microcontroller GPIOs and analog sensor inputs (e.g., MAP, TPS) from load dump and inductive switching spikes in 12 V systems. IC Role / Device Role: Unidirectional TVS placed between signal line and ground, clamping transients before they reach MCU pins. Use Value: With VC = 25.5 V and TJ = 185 °C rating, it prevents latch-up and gate oxide damage in AEC-Q100 qualified MCUs operating near hot engine compartments. | Use Scenario: Shields RS-485 transceiver data lines from ESD and motor commutation noise in variable frequency drives. IC Role / Device Role: Bidirectional protection not required; unidirectional TPSMP18AHM3_A/I used on biased differential pairs with common-mode reference. Use Value: Low VWM = 15.3 V allows integration into ±12 V or 24 V logic interfaces without false triggering, while 400 W PPPM handles repetitive surge events. |
| Automotive Camera Module Power Line | Consumer IoT Sensor Hub |
Use Scenario: Guards 12 V camera power input against ISO 16750-2 jump-start surges and alternator ripple in ADAS front cameras. IC Role / Device Role: Primary overvoltage clamp on main power rail upstream of DC-DC converter. Use Value: AEC-Q101 qualification and 185 °C TJ ensure uninterrupted operation during sustained high-temperature exposure behind vehicle grilles. | Use Scenario: Safeguards I²C and analog output lines of environmental sensors (e.g., humidity, pressure) in smart home hubs exposed to user-handling ESD. IC Role / Device Role: Point-of-entry TVS on sensor PCB, placed adjacent to connector to intercept fast transients before trace routing. Use Value: 1.0 mm height and DO-220AA footprint enable dense sensor array layouts; 1.0 µA leakage at VWM preserves battery life in always-on devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Higher VC = 29.2 V at same IPPM; lower PPPM = 400 W but larger SMA package (2.2 mm height) | Less suitable for space-constrained automotive modules; lacks AEC-Q101 certification | Select when cost sensitivity outweighs automotive qualification and board height constraints |
| TPSMD18A | Same VBR/VWM/VC specs but in larger DO-214AB (SMC) package; higher IFSM = 100 A | Better for high-energy surge zones (e.g., battery input), but incompatible with fine-pitch automated placement | Choose for non-automated production or where 2.5 mm height and 7.1 mm length are acceptable |
Compared with SMAJ18A and TPSMD18A, the TPSMP18AHM3_A/I uniquely combines AEC-Q101 qualification, 1.0 mm profile, and DO-220AA footprint - making it the only option among the three validated for high-density, high-temperature automotive signal-line protection without layout redesign.
Availability
TPSMP18AHM3_A/I is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive interfaces, and consumer IoT sensor hubs requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TPSMP18AHM3_A/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade performance.
The TPSMP18AHM3_A/I belongs to Vishay's PAR® (Protection Advanced Rectifier) series - engineered specifically for high-power-density, high-temperature transient suppression in automotive and industrial electronics where space, thermal margin, and qualification rigor are critical.
FAQ
What is the clamping voltage of the TPSMP18AHM3_A/I at its rated peak pulse current?
The TPSMP18AHM3_A/I has a maximum clamping voltage (VC) of 25.5 V when subjected to its rated peak pulse current (IPPM) of 15.9 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable voltage limiting during surge events. The TPSMP18AHM3_A/I maintains this clamping performance across its full operating temperature range, supporting robust design margins for protected ICs.
Is the TPSMP18AHM3_A/I suitable for automotive applications?
Yes, the TPSMP18AHM3_A/I is AEC-Q101 qualified and rated for junction temperatures up to 185 °C, making it fully suitable for automotive applications including engine control units, ADAS camera modules, and body electronics. Its DO-220AA package meets MSL Level 1 reflow requirements, and its unidirectional architecture aligns with DC-biased signal protection needs. The TPSMP18AHM3_A/I is explicitly listed in Vishay's automotive-grade product portfolio.
What does the "HM3_A/I" suffix indicate in TPSMP18AHM3_A/I?
The "HM3" denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance; "A" is the revision code; "I" specifies packaging in 13-inch tape-and-reel format with 10,000 units per reel. This differs from "H"-suffixed variants (7-inch reel, 3,000 units). The TPSMP18AHM3_A/I thus guarantees compliance with automotive material standards and supports high-volume SMT assembly logistics.
How does the TPSMP18AHM3_A/I compare to bidirectional TVS diodes?
The TPSMP18AHM3_A/I is unidirectional and optimized for DC-biased circuits - it conducts only during negative transients relative to its cathode, offering lower leakage and tighter VWM than equivalent bidirectional parts. Unlike bidirectional TVS diodes, the TPSMP18AHM3_A/I cannot suppress symmetrical AC transients. Its design targets applications like 12 V power rails or sensor outputs where polarity is fixed and low standby current is essential.
What is the recommended PCB pad layout for the TPSMP18AHM3_A/I?
Vishay specifies a 5.0 mm × 5.0 mm copper pad attached to each terminal for optimal thermal and surge performance. The TPSMP18AHM3_A/I datasheet (fig. 2) details exact dimensions and spacing to minimize parasitic inductance and maximize heat dissipation. Use of this layout ensures rated PPPM = 400 W and supports reliable operation at TJ = 185 °C. Deviation reduces surge capability and thermal margin for the TPSMP18AHM3_A/I.
TPSMP18AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-220AA
- Series:
- PAR®, eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.5V
- Current - Peak Pulse (10/1000µs):
- 15.9A
- 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-220AA (SMP)
TPSMP18AHM3_A/I FAQ
1.How can I place an order for TPSMP18AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP18AHM3_A/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 TPSMP18AHM3_A/I reliable?
The price and inventory of TPSMP18AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMP18AHM3_A/I is usually 5 days.
3.What payment methods are accepted for TPSMP18AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP18AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP18AHM3_A/I?
TPSMP18AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP18AHM3_A/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 TPSMP18AHM3_A/I?
For technical support, including TPSMP18AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP18AHM3_A/I requirements.
6.How does Aetrix verify that TPSMP18AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All TPSMP18AHM3_A/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 TPSMP18AHM3_A/I meets industry standards.
7.What is the process for return or replacement of TPSMP18AHM3_A/I?
All TPSMP18AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP18AHM3_A/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 TPSMP18AHM3_A/I part is unused and in its original packaging.
Return procedure for TPSMP18AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMP18AHM3_A/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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