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Vishay General Semiconductor - Diodes Division TPSMP18AHE3/85A
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- Part No.:
- TPSMP18AHE3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP18AHE3/85A.pdf
- Description:
- TVS DIODE 15.3VWM 25.5VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,431
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Product details
Overview
TPSMP18AHE3/85A from Vishay General Semiconductor is a unidirectional transient voltage suppressor diode in DO-220AA (SMP) package, rated for 17.1 V to 18.9 V breakdown voltage (VBR), 25.5 V clamping voltage (VC) at 15.9 A peak pulse current, and 400 W peak pulse power (10/1000 µs waveform). It delivers automotive-grade protection for low-voltage signal lines in engine control units and ADAS sensor interfaces.
For engineers reviewing the TPSMP18AHE3/85A datasheet, TPSMP18AHE3/85A pinout, TPSMP18AHE3/85A application, or TPSMP18AHE3/85A equivalent, key selection criteria include its AEC-Q101 qualification, 1.0 mm profile, 15.9 A IPPM, 25.5 V clamping performance, and DO-220AA thermal and mechanical robustness under automotive temperature cycling.
Technical Context
This device operates as a unidirectional avalanche diode, leveraging patented PAR oxide-passivated chip construction to achieve low incremental surge resistance and fast response time (<1 ns). Its clamping behavior is defined by a 10/1000 µs surge waveform with derating above 25 °C ambient per Fig. 2.
Designed for surface-mount placement on FR-4 PCBs with 5.0 × 5.0 mm copper pads per terminal, it supports automated assembly and meets J-STD-020 MSL Level 1 (260 °C peak reflow). Polarity is marked by a cathode band; terminals are matte tin-plated and whisker-tested per JESD201 Class 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V - defines reliable avalanche initiation range under 1 mA test current |
| VC @ IPPM | 25.5 V at 15.9 A - maximum voltage seen by protected circuit during 10/1000 µs surge |
| PPPM | 400 W - peak transient power handling capability under standard waveform |
| IFSM | 40 A - withstands 10 ms half-sine surge without degradation |
| TJ max. | +185 °C - enables operation in under-hood automotive environments |
| VWM | 15.3 V - maximum continuous reverse operating voltage before leakage rises |
| IR @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity in high-impedance circuits |
Pinout & Package
Package: DO-220AA (SMP), 2-terminal surface-mount case with 1.0 mm typical height, UL 94 V-0 molding compound, cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to protected line's low-side reference (e.g., ground return or signal sink) |
| Cathode | Avalanche clamping node | Connected to protected line input; absorbs surge energy when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR oxide passivation | Enables stable VBR tolerance and long-term reliability under thermal cycling |
| Low profile (1.0 mm height) | Reduces board space and enables placement near connectors or sensors in tight enclosures |
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, humidity, and mechanical shock |
| MSL Level 1 compliance | Allows single-reflow assembly without moisture sensitivity concerns |
| Matte tin plating + JESD201 Class 2 whisker test | Ensures solder joint integrity and long-term interconnect reliability |
Applications
| Automotive Engine Control Unit (ECU) | ADAS Camera Sensor Interface |
|---|---|
Use Scenario: Protects LIN bus transceiver inputs from load dump and alternator ripple in 12 V power domains. IC Role / Device Role: Unidirectional TVS clamping diode placed between LIN line and ground. Use Value: Limits transient voltage to ≤25.5 V while sustaining 400 W surges, preventing transceiver latch-up or damage. | Use Scenario: Shields MIPI CSI-2 differential pair inputs from ESD events during camera module mating/unmating. IC Role / Device Role: Low-capacitance unidirectional clamp on each signal line (CLK/STB/DATA). Use Value: 1.0 µA leakage at 15.3 V avoids DC bias shift; 25.5 V clamping prevents receiver overvoltage beyond ABSMAX. |
| Industrial CAN Transceiver Protection | Consumer Appliance Motor Driver Feedback |
Use Scenario: Guards isolated CAN FD transceivers against induced surges in factory automation cabling. IC Role / Device Role: Secondary-level TVS on CAN_H/CAN_L lines downstream of common-mode choke. Use Value: 400 W rating handles repetitive 10/1000 µs transients; 185 °C TJ max supports operation near motor drives. | Use Scenario: Protects hall-effect sensor outputs feeding microcontroller ADC inputs in washing machine drum control. IC Role / Device Role: Point-of-load clamp on analog feedback line between sensor and MCU. Use Value: 17.1–18.9 V VBR aligns with 18 V supply rail; 25.5 V VC ensures ADC input stays within 3.3 V rail-safe margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-E3/5AT | DO-214AC (SMA) package; 18 V nominal VBR; 27.7 V VC at 14.4 A; 400 W rating | Larger footprint (2.5 mm height); lower thermal mass; not AEC-Q101 qualified | Use where automotive qualification is not required and board height allows SMA form factor |
| TPSMA6.8A-S | DO-214AC package; 6.8 V VBR; 10.5 V VC at 500 A; 600 W rating | Lower voltage rating; higher clamping ratio; not optimized for 15–18 V rail protection | Select only if protecting sub-12 V logic rails; unsuitable for TPSMP18AHE3/85A's 15.3 V VWM use case |
Compared with SMAJ18A-E3/5AT and TPSMA6.8A-S, the TPSMP18AHE3/85A offers superior automotive qualification, tighter VBR tolerance (±5.5 %), lower profile (1.0 mm vs. 2.5 mm), and optimized clamping for 15.3 V working voltage-making it the preferred choice for space-constrained, high-reliability 12 V automotive signal lines.
Availability
TPSMP18AHE3/85A is available at Aetrix Electronics and suitable for automotive ECU design, ADAS sensor interface protection, and industrial CAN transceiver safeguarding requiring stable component supply across production lifecycles.
Supply support for TPSMP18AHE3/85A 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 validation.
The TPSMP series belongs to Vishay's eSMP™ family of high-power-density TVS diodes, engineered specifically for AEC-Q101-compliant transient suppression in space-constrained automotive electronics.
FAQ
What is the breakdown voltage range of the TPSMP18AHE3/85A?
The TPSMP18AHE3/85A has a guaranteed breakdown voltage (VBR) range of 17.1 V to 18.9 V at 1 mA test current, measured per ANSI/IEEE C62.35 standards. This tight ±5.5 % tolerance ensures consistent clamping onset across production lots and supports precise protection of 15.3 V stand-off voltage circuits without premature conduction.
Is the TPSMP18AHE3/85A qualified for automotive applications?
Yes, the TPSMP18AHE3/85A is AEC-Q101 qualified and designated as high-reliability/automotive grade (HE3 suffix). It undergoes rigorous stress testing including temperature cycling, humidity, mechanical shock, and solderability validation-making it suitable for under-hood and safety-critical vehicle subsystems.
What is the clamping voltage and peak pulse current for the TPSMP18AHE3/85A?
The TPSMP18AHE3/85A clamps to a maximum of 25.5 V at 15.9 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This VC/IPPM point is measured with 5.0 × 5.0 mm copper pads per terminal and defines the upper voltage limit imposed on protected circuitry during surge events.
Does the TPSMP18AHE3/85A have a unidirectional or bidirectional configuration?
The TPSMP18AHE3/85A is a unidirectional TVS diode, intended for DC-biased lines where reverse polarity is not expected. Its cathode is marked by a color band, and it conducts only during positive transients exceeding VBR; it does not provide symmetrical clamping like bidirectional devices.
What packaging and reel options are available for the TPSMP18AHE3/85A?
The TPSMP18AHE3/85A ships in 13-inch diameter plastic tape and reel format (package code 85A), with a base quantity of 10,000 units per reel. The DO-220AA (SMP) package features matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability requirements.
TPSMP18AHE3/85A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-220AA
- Series:
- PAR®, eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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)
TPSMP18AHE3/85A FAQ
1.How can I place an order for TPSMP18AHE3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP18AHE3/85A 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 TPSMP18AHE3/85A reliable?
The price and inventory of TPSMP18AHE3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMP18AHE3/85A is usually 5 days.
3.What payment methods are accepted for TPSMP18AHE3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP18AHE3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP18AHE3/85A?
TPSMP18AHE3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP18AHE3/85A 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 TPSMP18AHE3/85A?
For technical support, including TPSMP18AHE3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP18AHE3/85A requirements.
6.How does Aetrix verify that TPSMP18AHE3/85A is sourced from the original manufacturer or authorized distributors?
All TPSMP18AHE3/85A 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 TPSMP18AHE3/85A meets industry standards.
7.What is the process for return or replacement of TPSMP18AHE3/85A?
All TPSMP18AHE3/85A units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP18AHE3/85A, 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 TPSMP18AHE3/85A part is unused and in its original packaging.
Return procedure for TPSMP18AHE3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMP18AHE3/85A Tags
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