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Vishay General Semiconductor - Diodes Division TPSMP18AHM3/85A
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- Part No.:
- TPSMP18AHM3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP18AHM3/85A.pdf
- Description:
- TVS DIODE 15.3VWM 25.5VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,146
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Product details
Overview
TPSMP18AHM3/85A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-220AA (SMP) package, designed for high-reliability overvoltage protection of sensitive electronics. It features a 17.1 V to 18.9 V breakdown voltage (VBR), 15.9 A peak pulse current (IPPM), 25.5 V clamping voltage (VC) at IPPM, and 400 W peak pulse power (PPPM) - optimized for automotive and industrial signal-line protection.
For engineers reviewing the TPSMP18AHM3/85A datasheet, TPSMP18AHM3/85A pinout, TPSMP18AHM3/85A application, or TPSMP18AHM3/85A equivalent, this device delivers AEC-Q101 qualification, 185 °C junction capability, ultra-low profile (1.0 mm height), MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant construction - critical for automotive ECU, sensor interface, and power rail surge protection design.
Technical Context
The TPSMP18AHM3/85A employs passivated anisotropic rectifier technology with junction passivation, enabling stable clamping under repetitive surge stress. Its unidirectional architecture provides low forward voltage (2.5 V at 25 A) and fast response time, suitable for protecting downstream ICs from ESD and lightning-induced transients.
Designed for surface-mount automated placement on FR-4 PCBs, it uses matte tin-plated terminals compliant with J-STD-002 and JESD 22-B102, and meets JESD 201 Class 2 whisker resistance. Thermal derating follows a defined curve up to 185 °C maximum junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V - defines reliable turn-on threshold for transient suppression without false triggering during normal operation |
| VC @ IPPM | 25.5 V - maximum clamped voltage seen by protected circuit during 10/1000 μs surge, limiting stress on downstream components |
| PPPM | 400 W - peak pulse power handling capacity for 10/1000 μs waveform, supporting robust surge immunity per IEC 61000-4-5 |
| IPPM | 15.9 A - peak surge current capability under standardized test conditions, directly sizing protection margin |
| VWM | 15.3 V - maximum continuous reverse stand-off voltage, ensuring no conduction during nominal system operation |
| TJ max. | +185 °C - extended junction temperature rating enables use in under-hood automotive environments and high-power industrial enclosures |
| Package | DO-220AA (SMP) - ultra-low-profile SMD package (1.0 mm typical height) compatible with high-density PCB layouts and reflow assembly |
Pinout & Package
DO-220AA (SMP) package: single-axis molded case with cathode band marking; 1.0 mm typical height; 0.105" × 0.086" footprint (2.67 mm × 2.18 mm); matte tin-plated terminals; polarity indicated by color band at cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to protected line (e.g., CAN_H, LIN, sensor output); conducts during positive transients when used in unidirectional configuration |
| Cathode | Clamping reference / ground reference | Connected to system ground or low-impedance return path; establishes clamping voltage relative to reference plane during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Passivated anisotropic rectifier technology | Enables stable VBR tolerance (±5 %) and low leakage (<1 μA at VWM) across temperature and lifetime |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, UHAST, and mechanical shock testing per JESD47 |
| MSL Level 1 (260 °C peak) | Eliminates pre-bake requirement before reflow soldering, reducing manufacturing complexity and cost |
| 1.0 mm profile | Reduces board space and enables placement beneath connectors or in tight sensor housings without mechanical interference |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements for automotive and industrial OEM supply chains |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control modules and ADAS subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and microcontroller ADC input to absorb ESD and load-dump induced transients. Use Value: Maintains signal integrity below 25.5 V clamping level while surviving repeated 15.9 A surges - preserving sensor accuracy and MCU longevity in harsh 12 V/24 V systems. | Use Scenario: Safeguarding CAN_H/CAN_L differential pair against ISO 7637-2 pulse 1, 2a, 3a/b and IEC 61000-4-4 EFT events in factory automation nodes. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to chassis ground, providing low-capacitance (<50 pF), fast-response overvoltage clamping. Use Value: Enables uninterrupted CAN communication under 400 W surge stress without bit errors or bus lockup - validated per AEC-Q101 for 15+ year vehicle service life. |
| Consumer Power Adapter Input | Motor Drive Gate Driver Protection |
Use Scenario: Secondary-side DC bus protection in USB-C PD adapters and AC/DC SMPS units exposed to mains-borne surges. IC Role / Device Role / Timing Role: TVS placed across +VOUT and GND to limit transient overvoltage spikes caused by capacitor discharge or transformer ringing. Use Value: Absorbs 400 W pulses without degradation, preventing damage to synchronous rectifiers and secondary-side controllers - supports UL/IEC 62368-1 compliance. | Use Scenario: Clamping gate-source voltage spikes on N-channel MOSFETs in BLDC motor inverters subjected to parasitic inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS connected between gate and source to clamp negative-going transients below -25.5 V, avoiding gate oxide rupture. Use Value: Provides sub-nanosecond response to fast-rising dv/dt events, ensuring gate driver reliability in 20 kHz PWM switching environments with >100 kV/μs slew rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | DO-214AC (SMA) package; 18 V nominal VBR; 200 W PPPM; 11.7 A IPPM; higher profile (2.29 mm) | Limited to lower-energy transients; less suitable for space-constrained automotive modules | Select SMAJ18A only if board layout allows larger footprint and thermal budget permits lower surge margin. |
| TPSMA6.8A | Same DO-220AA package; lower VBR (6.45–7.14 V); 300 W PPPM; 500 A IPPM - not applicable for 15.3 V VWM systems | Designed for 5 V logic rails; incompatible with 12 V/24 V automotive power domains | Choose TPSMA6.8A only for 3.3–5 V digital interface protection where VWM ≤ 5.8 V is required. |
Compared with SMAJ18A and TPSMA6.8A, the TPSMP18AHM3/85A delivers 2× higher peak pulse power in a 56 % lower profile package, with AEC-Q101 validation and tighter VBR tolerance - making it the preferred choice for next-generation automotive and industrial designs requiring compact, high-energy surge resilience.
Availability
TPSMP18AHM3/85A is available at Aetrix Electronics and suitable for automotive ECU design, industrial CAN node development, and consumer power adapter production requiring stable component supply and long-term lifecycle support.
Supply support for TPSMP18AHM3/85A 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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The TPSMP series belongs to Vishay's high-power-density PAR® transient suppressor family, engineered specifically for AEC-Q101-compliant automotive and demanding industrial environments where compact size, high surge capability, and extended temperature operation are mandatory.
FAQ
What is the breakdown voltage range of the TPSMP18AHM3/85A?
The TPSMP18AHM3/85A has a guaranteed breakdown voltage (VBR) range of 17.1 V to 18.9 V at 1.0 mA test current, per the Vishay datasheet revision 22-Jul-16. This ±5 % tolerance ensures precise clamping behavior in 12 V and 24 V automotive systems, and the value is measured after applying a 300 μs square-wave pulse per ANSI/IEEE C62.35 standards. The TPSMP18AHM3/85A maintains this specification across its full operating temperature range.
Is the TPSMP18AHM3/85A suitable for automotive applications?
Yes, the TPSMP18AHM3/85A is AEC-Q101 qualified and rated for TJ = -65 °C to +185 °C, making it fully suitable for under-hood and body-control module applications. Its DO-220AA package meets MSL Level 1, its terminals pass JESD 201 Class 2 whisker testing, and its construction is halogen-free and RoHS-compliant - all requirements for Tier 1 automotive supply chains. The TPSMP18AHM3/85A is explicitly listed in Vishay's automotive-grade product documentation.
What is the clamping voltage of the TPSMP18AHM3/85A at its rated peak pulse current?
The TPSMP18AHM3/85A exhibits a maximum clamping voltage (VC) of 25.5 V at its rated peak pulse current (IPPM) of 15.9 A, tested with a 10/1000 μs waveform. This value is confirmed in the Electrical Characteristics table on page 2 of the Vishay document 88471. The low clamping ratio (VC/VBR ≈ 1.35) reflects efficient energy diversion and protects downstream ICs such as CAN transceivers and microcontrollers powered from 12 V rails.
Does the TPSMP18AHM3/85A have polarity marking, and how is it identified?
Yes, the TPSMP18AHM3/85A uses a cathode band marking on the DO-220AA (SMP) package body to indicate polarity - consistent with standard diode convention. The band denotes the cathode terminal, which must be connected to the system ground or reference plane. This marking is visible under standard optical inspection and is specified in the Mechanical Data section of the Vishay datasheet. The TPSMP18AHM3/85A is unidirectional and will conduct only when anode voltage exceeds cathode voltage by ≥VBR.
What packaging option does the TPSMP18AHM3/85A use, and what is its reel quantity?
The TPSMP18AHM3/85A is supplied in 13" diameter plastic tape and reel packaging, with a base quantity of 10,000 pieces per reel - denoted by the "/85A" suffix in the part number. This packaging format supports high-speed automated pick-and-place assembly and complies with EIA-481 standards. The device weight per unit is 0.024 g, and the tape pitch is 8 mm, as specified in Vishay's Ordering Information table on page 3 of document 88471.
TPSMP18AHM3/85A 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)
TPSMP18AHM3/85A FAQ
1.How can I place an order for TPSMP18AHM3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP18AHM3/85A 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 TPSMP18AHM3/85A reliable?
The price and inventory of TPSMP18AHM3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMP18AHM3/85A is usually 5 days.
3.What payment methods are accepted for TPSMP18AHM3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP18AHM3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP18AHM3/85A?
TPSMP18AHM3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP18AHM3/85A 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 TPSMP18AHM3/85A?
For technical support, including TPSMP18AHM3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP18AHM3/85A requirements.
6.How does Aetrix verify that TPSMP18AHM3/85A is sourced from the original manufacturer or authorized distributors?
All TPSMP18AHM3/85A 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 TPSMP18AHM3/85A meets industry standards.
7.What is the process for return or replacement of TPSMP18AHM3/85A?
All TPSMP18AHM3/85A units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP18AHM3/85A, 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 TPSMP18AHM3/85A part is unused and in its original packaging.
Return procedure for TPSMP18AHM3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMP18AHM3/85A Tags
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