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Vishay General Semiconductor - Diodes Division TPSMP18AHM3_A/H
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- Part No.:
- TPSMP18AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP18AHM3_A/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.5VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,095
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Product details
Overview
TPSMP18AHM3_A/H 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), 400 W peak pulse power (PPPM), 15.9 A peak pulse current (IPPM), and clamps to 25.5 V at rated surge - deployed on signal lines and power rails of automotive ECUs and sensor interfaces.
For engineers reviewing the TPSMP18AHM3_A/H datasheet, TPSMP18AHM3_A/H pinout, TPSMP18AHM3_A/H application, or TPSMP18AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, 185 °C junction rating, SMP (DO-220AA) package with 1.0 mm profile, low incremental surge resistance, and unidirectional polarity for DC-biased protection paths.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver fast response time (<1 ns), low clamping ratio (VC/VBR ≈ 1.35), and stable performance across -65 °C to +185 °C operating range. Its junction passivation enables robust reliability under repeated surge stress and high-temperature automotive environments.
The device operates as a unidirectional clamp, conducting only during reverse overvoltage events above VBR, with 1.0 μA max reverse leakage at VWM and 2.5 V forward voltage at 25 A - ensuring minimal interference during normal operation while providing precise, repeatable surge suppression per IEC 61000-4-5 and ISO 16750-2 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V - defines precise reverse avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 15.3 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| IPPM (10/1000 μs) | 15.9 A - peak surge current it safely clamps without failure under standard lightning-surge waveform |
| VC @ IPPM | 25.5 V - clamped voltage during full-rated surge, limiting downstream IC stress to safe levels |
| PPPM | 400 W - peak pulse power handling capacity for VBR ≥ 13 V variants, enabling robust ESD/EFT protection |
| TJ max | +185 °C - supports under-hood automotive placement and long-term thermal stability |
| Package | SMP (DO-220AA) - ultra-low-profile surface-mount package (1.0 mm height) optimized for automated assembly |
Pinout & Package
TPSMP18AHM3_A/H is a two-terminal unidirectional TVS diode in the SMP (DO-220AA) package. The cathode is marked by a color band; the anode is the unmarked end. No internal circuitry or control pins exist - terminals serve solely as surge-current input (cathode) and return path (anode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current entry point | Connected to protected line; conducts reverse avalanche current during overvoltage |
| Anode (unbanded end) | Surge current return path | Connected to ground or lower-potential rail; completes clamping loop with minimal inductance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and surge endurance |
| Junction passivation | Reduces surface leakage and improves long-term stability under high-humidity and high-TJ conditions |
| MSL Level 1 (260 °C) | Enables lead-free reflow compatibility without preconditioning or moisture sensitivity concerns |
| Low profile (1.0 mm typical height) | Minimizes board space and mechanical interference in tight-fit automotive modules and sensor housings |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements for automotive and industrial supply chains |
Applications
| Automotive Body Control Module (BCM) | Industrial CAN Transceiver Protection |
|---|---|
Use Scenario: Protects LIN bus and power-switch driver outputs in BCMs exposed to load dump and jump-start transients. IC Role / Device Role: Unidirectional TVS placed between protected line and chassis ground to clamp surges up to 400 W. Use Value: Maintains VC ≤ 25.5 V during 15.9 A surge, preventing damage to 3.3 V/5 V microcontrollers and gate drivers. |
Use Scenario: Shields CANH/CANL differential pair inputs against ESD and coupled transients in factory automation nodes. IC Role / Device Role: Paired unidirectional TVS devices (one per line) referenced to common ground with low capacitance. Use Value: Delivers <1 ns response and 1.0 μA leakage at 15.3 V, preserving signal integrity and bus timing margins. |
| Automotive Occupant Detection Sensor | Consumer Appliance Motor Driver Interface |
Use Scenario: Safeguards capacitive or resistive seat occupancy sensor analog front-end from ESD and cable discharge events. IC Role / Device Role: Low-leakage TVS on sensor signal path, placed immediately at connector entry point. Use Value: Ensures <1.0 μA leakage at VWM, avoiding DC offset errors in precision 16-bit ADC measurements. |
Use Scenario: Protects H-bridge gate drive signals and feedback lines in smart washing machine motor controllers. IC Role / Device Role: Clamp element on low-voltage logic side of optocouplers and level shifters. Use Value: Withstands 40 A IFSM and 2.5 V VF at 25 A, supporting robust surge immunity without forward conduction loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Higher VC/VBR ratio (29.2 V @ 12.1 A); SMA package (2.3 mm height); 300 W PPPM | Larger footprint and height limit use in ultra-thin modules; lower surge rating reduces margin in harsh automotive environments | Choose SMAJ18A only if board height >2.0 mm is acceptable and 300 W surge rating suffices for system-level testing |
| TPSMA6.8A | Lower VBR (6.45–7.14 V); same SMP package; 250 W PPPM; not AEC-Q101 qualified | Not suitable for 12 V automotive power rail protection; lacks automotive qualification and high-TJ capability | Select TPSMA6.8A only for non-automotive consumer applications where cost is prioritized over qualification and thermal margin |
Compared with SMAJ18A and TPSMA6.8A, TPSMP18AHM3_A/H delivers superior automotive readiness via AEC-Q101, higher 400 W surge rating, tighter VBR tolerance, and 1.0 mm profile - making it the preferred choice for space-constrained, high-reliability 12 V/24 V systems.
Availability
TPSMP18AHM3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN node protection, and consumer appliance motor control requiring stable component supply, traceable sourcing, and long-lifecycle support.
Supply support for TPSMP18AHM3_A/H 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 application-specific optimization.
The TPSMP18AHM3_A/H belongs to Vishay's PAR® high-power-density TVS family, engineered specifically for automotive-grade transient suppression in space-constrained, high-temperature environments such as engine control units and ADAS sensor interfaces.
FAQ
What is the breakdown voltage range of the TPSMP18AHM3_A/H?
The TPSMP18AHM3_A/H has a guaranteed breakdown voltage (VBR) range of 17.1 V to 18.9 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage threshold design in 12 V automotive systems where TPSMP18AHM3_A/H is commonly deployed.
Is the TPSMP18AHM3_A/H suitable for automotive applications?
Yes, the TPSMP18AHM3_A/H is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it fully suitable for under-hood and cabin automotive applications. Its construction, MSL Level 1 rating, halogen-free composition, and validation per JESD22 and J-STD-020 confirm TPSMP18AHM3_A/H meets stringent automotive reliability requirements.
What package does the TPSMP18AHM3_A/H use, and what are its dimensions?
The TPSMP18AHM3_A/H uses the SMP (DO-220AA) package - a compact surface-mount outline measuring 3.61 mm × 2.18 mm × 1.0 mm (L × W × H). Its low 1.0 mm profile and matte tin-plated leads support fine-pitch automated placement and lead-free reflow, critical for modern automotive PCB assembly where TPSMP18AHM3_A/H is integrated.
How does the clamping voltage of the TPSMP18AHM3_A/H compare to its breakdown voltage?
The TPSMP18AHM3_A/H clamps to 25.5 V at its rated 15.9 A peak pulse current (10/1000 μs), yielding a clamping ratio (VC/VBR) of approximately 1.35. This low ratio reflects efficient surge energy absorption and ensures protected downstream ICs experience minimal overvoltage stress - a key performance metric confirmed in the official TPSMP18AHM3_A/H datasheet.
Does the TPSMP18AHM3_A/H have polarity marking, and how is it identified?
Yes, the TPSMP18AHM3_A/H features a visible cathode band on the SMP (DO-220AA) package body. The banded end is the cathode - the terminal that connects to the line being protected - while the unbanded end is the anode, typically tied to ground. This marking is consistent across all TPSMPx series devices and is verified in Vishay's mechanical drawings for TPSMP18AHM3_A/H.
TPSMP18AHM3_A/H 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/H FAQ
1.How can I place an order for TPSMP18AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP18AHM3_A/H 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/H reliable?
The price and inventory of TPSMP18AHM3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for TPSMP18AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP18AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP18AHM3_A/H?
TPSMP18AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP18AHM3_A/H 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/H?
For technical support, including TPSMP18AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP18AHM3_A/H requirements.
6.How does Aetrix verify that TPSMP18AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMP18AHM3_A/H 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/H meets industry standards.
7.What is the process for return or replacement of TPSMP18AHM3_A/H?
All TPSMP18AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP18AHM3_A/H, 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/H part is unused and in its original packaging.
Return procedure for TPSMP18AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMP18AHM3_A/H Tags
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