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Vishay General Semiconductor - Diodes Division TPSMP22AHM3/85A
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- Part No.:
- TPSMP22AHM3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP22AHM3/85A.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,646
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Product details
Overview
TPSMP22AHM3/85A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-220AA (SMP) package, designed for high-reliability automotive and industrial overvoltage protection. It features a 20.9 V to 23.1 V breakdown voltage (VBR), 30.6 V clamping voltage (VC) at 13.1 A peak pulse current (IPPM), 400 W peak pulse power (PPPM), and operates up to +185 °C junction temperature - ideal for protecting sensor signal lines and drive transistors against ESD and surge events.
For engineers reviewing the TPSMP22AHM3/85A datasheet, TPSMP22AHM3/85A pinout, TPSMP22AHM3/85A application, or TPSMP22AHM3/85A equivalent, this device delivers AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and low-profile 1.0 mm height for space-constrained PCB layouts in automotive ECUs and industrial I/O modules.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of transient threats per ISO 7637-2 and IEC 61000-4-2 standards. Its unidirectional polarity and 17.8 V stand-off voltage (VWM) allow integration in DC-biased signal or power rails without forward conduction during normal operation.
The DO-220AA package supports automated placement and meets UL 94 V-0 flammability rating with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. Thermal derating follows a defined curve above 25 °C ambient, maintaining 2.5 W steady-state power dissipation at 75 °C on infinite heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V - ensures reliable triggering above system operating voltage while avoiding false clamping |
| VWM | 17.8 V - maximum continuous reverse voltage before leakage exceeds 1 μA, compatible with 15–18 V supply rails |
| VC @ IPPM | 30.6 V at 13.1 A - limits downstream voltage stress during 10/1000 μs surge, protecting 3.3 V or 5 V logic interfaces |
| PPPM | 400 W - handles high-energy transients common in automotive load-dump and inductive switching scenarios |
| TJ max. | +185 °C - supports under-hood and industrial environments where ambient temperatures exceed 125 °C |
| IFSM | 40 A - withstands 10 ms half-sine surge without degradation, suitable for motor driver gate-drive protection |
| Leakage @ VWM | ≤1.0 μA at 25 °C - minimizes standby power loss in battery-powered sensor nodes |
Pinout & Package
DO-220AA (SMP) package: surface-mount, single-axis molded case with cathode band marking; overall dimensions 3.61 mm × 1.88 mm × 1.0 mm (L × W × H); matte tin-plated terminals; MSL Level 1, reflow-compatible up to 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to protected line's low-side or ground reference; forms clamping loop with cathode |
| Cathode | Reverse-biased terminal / clamping node | Connected to protected line's high-side; conducts during overvoltage to clamp voltage at VC |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| 185 °C junction rating | Enables use in high-temperature zones without thermal derating penalties beyond datasheet curves |
| 1.0 mm typical height | Reduces board profile for compact modules such as automotive camera PCBs and industrial fieldbus nodes |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive ICs |
| MSL Level 1 compliance | Eliminates bake-out requirement prior to reflow, streamlining SMT manufacturing for high-volume production |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground to shunt transients before reaching MCU ADC or LIN transceiver input. Use Value: Clamps 30.6 V at 13.1 A, ensuring downstream ICs see <31 V during 10/1000 μs surges - within absolute maximum ratings of most automotive-grade analog front-ends. |
Use Scenario: Safeguarding RS-485 or CAN FD data lines in programmable logic controllers subjected to EFT and surge per IEC 61000-4-4/5. IC Role / Device Role / Timing Role: Standoff voltage of 17.8 V allows compatibility with ±12 V differential signaling while suppressing common-mode spikes. Use Value: 400 W peak pulse power and 1.0 μA leakage enable robust protection without compromising signal integrity or increasing quiescent current in always-on field devices. |
| Motor Drive Gate Protection | Power Supply Input Stage |
|
Use Scenario: Shielding MOSFET gate drivers in BLDC inverters from inductive kickback during PWM switching transitions. IC Role / Device Role / Timing Role: Placed across gate-source terminals to clamp voltage spikes exceeding VGS abs max (typically ±20 V). Use Value: Fast response time and 30.6 V clamping limit gate overvoltage below destructive thresholds, preventing unintended turn-on or oxide damage. |
Use Scenario: Secondary-level surge suppression on 24 V DC input rails of industrial HMIs and embedded controllers after primary MOV filtering. IC Role / Device Role / Timing Role: Final-stage TVS absorbing residual energy that passes through upstream filters and limiting rail voltage to safe levels. Use Value: 400 W PPPM and 185 °C rating ensure sustained reliability in hot, dusty enclosures where airflow is limited and thermal management is passive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5AT | DO-214AC (SMA) package; 22 V nominal VBR; 32.4 V VC @ 12.3 A; 400 W PPPM; same AEC-Q101 grade | Larger footprint (4.5 mm × 2.7 mm) and 2.2 mm height - less suitable for ultra-thin modules | Choose when legacy SMA layout exists or higher thermal mass is needed for repetitive surge duty cycles |
| TPSMA6.8A-Q | Same DO-220AA package; lower VBR (6.45–7.14 V); 10.5 V VC @ 26.5 A; 300 W PPPM; AEC-Q101 qualified | Optimized for 5 V systems (USB, MCU I/O); not rated for 24 V rail protection | Choose for low-voltage digital interface protection where tighter clamping and lower VWM are required |
Compared with SMAJ22A-E3/5AT and TPSMA6.8A-Q, the TPSMP22AHM3/85A provides identical surge capability in a 30 % smaller footprint and 55 % lower profile - critical for next-generation automotive domain controllers where PCB real estate and Z-height are constrained.
Availability
TPSMP22AHM3/85A is available at Aetrix Electronics and suitable for automotive sensor modules, industrial I/O protectors, and motor drive gate circuits requiring stable component supply, AEC-Q101 assurance, and high-temperature operational continuity.
Supply support for TPSMP22AHM3/85A 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, and protection devices with emphasis on reliability, automotive qualification, and high-power density packaging.
The TPSMP series belongs to Vishay's eSMP® family of high-power-density TVS diodes, engineered specifically for space-constrained, high-temperature automotive and industrial applications demanding AEC-Q101 compliance and robust surge immunity.
FAQ
What is the breakdown voltage range of the TPSMP22AHM3/85A?
The TPSMP22AHM3/85A has a specified breakdown voltage (VBR) range of 20.9 V to 23.1 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This range ensures consistent triggering behavior across production lots while accommodating thermal drift and process variation - critical for repeatable protection performance in automotive environments where ambient temperature swings widely.
Is the TPSMP22AHM3/85A suitable for bidirectional signal line protection?
No, the TPSMP22AHM3/85A is strictly unidirectional and must be used only in DC-biased applications where polarity is fixed - such as 24 V power inputs or single-ended sensor outputs. For bidirectional lines like USB D+/D− or RS-485 differential pairs, a dedicated bidirectional TVS (e.g., TPSMD22A) is required; using TPSMP22AHM3/85A in reverse-biased configuration would result in premature conduction and potential failure.
Does the TPSMP22AHM3/85A require a heatsink for 2.5 W continuous operation?
The 2.5 W steady-state power dissipation rating for TPSMP22AHM3/85A applies only when mounted on an infinite heatsink at 75 °C ambient. In standard FR-4 PCB layouts with recommended 5.0 mm × 5.0 mm copper pads per terminal, derating is required - actual usable continuous power drops to ~0.8 W at 75 °C. The device is intended for transient, not continuous, power dissipation; sustained DC power should remain below 100 mW.
How does the 185 °C maximum junction temperature impact PCB layout for TPSMP22AHM3/85A?
The 185 °C TJmax rating of TPSMP22AHM3/85A allows placement near heat-generating components (e.g., power MOSFETs or DC-DC converters) without thermal shutdown risk, provided trace width and copper area meet Vishay's minimum pad recommendations. Layouts must avoid enclosing the device in thermally isolated zones - adequate copper pour and thermal vias beneath both terminals are essential to maintain junction temperature within spec during repeated surge events.
What does the "HM3/85A" suffix indicate in TPSMP22AHM3/85A?
The "HM3" denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "85A" specifies the packaging format: 13-inch diameter plastic tape and reel containing 10,000 units. This differs from "84A" (7-inch reel, 3,000 units) and "H"/"I" variants - all share identical electrical and thermal specs, differing only in packaging and reel size for SMT line compatibility.
TPSMP22AHM3/85A 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):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 13.1A
- 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)
TPSMP22AHM3/85A FAQ
1.How can I place an order for TPSMP22AHM3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP22AHM3/85A 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 TPSMP22AHM3/85A reliable?
The price and inventory of TPSMP22AHM3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMP22AHM3/85A is usually 5 days.
3.What payment methods are accepted for TPSMP22AHM3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP22AHM3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP22AHM3/85A?
TPSMP22AHM3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP22AHM3/85A 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 TPSMP22AHM3/85A?
For technical support, including TPSMP22AHM3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP22AHM3/85A requirements.
6.How does Aetrix verify that TPSMP22AHM3/85A is sourced from the original manufacturer or authorized distributors?
All TPSMP22AHM3/85A 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 TPSMP22AHM3/85A meets industry standards.
7.What is the process for return or replacement of TPSMP22AHM3/85A?
All TPSMP22AHM3/85A units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP22AHM3/85A, 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 TPSMP22AHM3/85A part is unused and in its original packaging.
Return procedure for TPSMP22AHM3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMP22AHM3/85A Tags
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