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Vishay General Semiconductor - Diodes Division TPSMP27AHM3/85A
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- Part No.:
- TPSMP27AHM3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP27AHM3/85A.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,926
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Product details
Overview
TPSMP27AHM3/85A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the eSMP® Series, designed for high-reliability overvoltage protection of sensitive electronics. It features a 25.7 V to 28.4 V breakdown voltage (VBR), 37.5 V clamping voltage (VC) at 10.7 A peak pulse current, 400 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - ideal for automotive power line and sensor interface protection.
For engineers reviewing the TPSMP27AHM3/85A datasheet, TPSMP27AHM3/85A pinout, TPSMP27AHM3/85A application, or TPSMP27AHM3/85A equivalent, key selection criteria include its AEC-Q101 qualification, DO-220AA (SMP) package with 1.0 mm profile, low incremental surge resistance, and MSL Level 1 moisture sensitivity rating for robust automated assembly.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for fast response (<1 ns) and stable clamping under repetitive surge events. Its unidirectional configuration provides forward conduction capability while suppressing reverse transients, with thermal design validated for operation at TJ = 185 °C on standard FR-4 PCBs using 5.0 mm × 5.0 mm copper pads per terminal.
The device meets JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 (260 °C reflow peak), supporting automotive-grade reliability without derating in harsh environments. Its 0.096 %/°C VBR temperature coefficient ensures predictable voltage threshold stability across wide operating ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V - defines precise reverse breakdown threshold for accurate overvoltage triggering |
| VC @ IPPM | 37.5 V at 10.7 A - limits maximum protected-line voltage during 10/1000 µs surge |
| PPPM | 400 W - sustains high-energy transients common in automotive load-dump and ISO 7637-2 pulses |
| VWM | 23.1 V - ensures reliable blocking of normal operating voltage with margin before clamping |
| IR @ VWM | 1.0 µA - minimizes standby leakage in battery-powered or low-power sensor circuits |
| TJ max | +185 °C - enables placement near hot components (e.g., power MOSFETs, DC/DC converters) without derating |
| Package | DO-220AA (SMP) - ultra-low-profile 1.0 mm height supports dense PCB layouts and automated pick-and-place |
Pinout & Package
TPSMP27AHM3/85A is a two-terminal unidirectional TVS diode in the DO-220AA (SMP) surface-mount package. The cathode is marked by a color band on the body; polarity must be observed during PCB layout to ensure correct transient suppression direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connects to lower-potential side (e.g., GND or signal return); conducts during positive surges when used in reverse-biased protection |
| Cathode | Clamping node | Connects to protected line (e.g., 24 V rail or sensor input); initiates avalanche breakdown when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| MSL Level 1 (260 °C) | Enables single-pass reflow without baking, reducing manufacturing cost and process complexity |
| 185 °C junction rating | Eliminates thermal derating in under-hood environments and high-power industrial enclosures |
| 0.096 %/°C VBR tempco | Ensures ±3.5 % VBR shift over -40 °C to +150 °C ambient, critical for precision protection thresholds |
| Low-profile 1.0 mm height | Reduces board-level mechanical stress and improves shock/vibration resilience in mobile and automotive systems |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in vehicle ECUs against ISO 7637-2 pulse 1 (inductive switch-off) and pulse 5a (load dump). IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients within safe limits for downstream regulators and microcontrollers. Use Value: Withstands 400 W surges and maintains clamping at ≤37.5 V, preventing damage to 3.3 V/5 V logic supplies and ensuring ECU functional safety compliance. | Use Scenario: Safeguarding analog inputs of pressure, temperature, or position sensors in factory automation PLC modules exposed to relay coil flyback and ESD. IC Role / Device Role / Timing Role: TVS connected across sensor signal and reference lines to shunt fast transients before they reach precision ADC front-ends. Use Value: Sub-1 ns response time and 1.0 µA leakage at 23.1 V VWM preserve signal integrity and measurement accuracy in 16-bit+ sensor systems. |
| Consumer Appliance Motor Drive Protection | Telecom Power Input Protection |
Use Scenario: Shielding H-bridge gate drivers and current-sense amplifiers in smart home appliance motor controllers from commutation spikes. IC Role / Device Role / Timing Role: TVS mounted at motor driver IC power pins to absorb inductive energy from brushed/BLDC motor back-EMF. Use Value: 40 A IFSM rating and 400 W PPPM handle repeated switching surges without degradation, extending system lifetime. | Use Scenario: Guarding primary-side DC input of PoE-powered network switches against lightning-induced surges on outdoor Ethernet cables. IC Role / Device Role / Timing Role: Primary-stage TVS on 48 V input rail to limit transient energy entering secondary-side isolation and regulation stages. Use Value: 37.5 V clamping at 10.7 A ensures upstream DC/DC converters remain within absolute maximum ratings during Category A/B surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A | Higher VBR (25.2–27.8 V), same DO-214AC package, 400 W PPPM, but only rated to +150 °C TJ | Lacks AEC-Q101 qualification and 185 °C rating; unsuitable for under-hood automotive use | Select SMAJ28A only for cost-sensitive industrial or consumer designs where extended temperature range is not required |
| TPSMA6.8A | Lower VBR (6.45–7.14 V), same eSMP® platform, but 300 W PPPM and 26.5 V VC; smaller 0.9 mm height | Designed for 5 V/3.3 V logic rails, not 24 V systems; insufficient clamping headroom for TPSMP27AHM3/85A's target voltage range | Choose TPSMA6.8A only for low-voltage digital I/O protection where space is more constrained than power handling |
Compared with SMAJ28A and TPSMA6.8A, TPSMP27AHM3/85A uniquely combines AEC-Q101 qualification, +185 °C operation, and 400 W surge capacity in a 1.0 mm profile - making it the only option among the three suitable for high-reliability 24 V automotive power line protection.
Availability
TPSMP27AHM3/85A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, and telecom power input protection requiring stable component supply and long-term lifecycle support.
Supply support for TPSMP27AHM3/85A 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The eSMP® Series TVS diodes - including TPSMP27AHM3/85A - were engineered specifically for high-power-density, high-temperature transient suppression in next-generation automotive and industrial power systems.
FAQ
What is the exact breakdown voltage range for TPSMP27AHM3/85A?
The TPSMP27AHM3/85A has a guaranteed breakdown voltage (VBR) range of 25.7 V to 28.4 V at 1.0 mA test current, as specified in the Vishay datasheet revision 22-Jul-16. This tight tolerance ensures consistent clamping behavior across production lots and temperature extremes, critical for protecting 24 V systems where overvoltage margins are narrow.
Is TPSMP27AHM3/85A suitable for automotive under-hood applications?
Yes, TPSMP27AHM3/85A is AEC-Q101 qualified and rated for continuous operation up to +185 °C junction temperature, making it fully suitable for under-hood automotive applications such as engine control modules, transmission control units, and ADAS sensor hubs where ambient temperatures exceed 125 °C.
What does the "HM3/85A" suffix mean in TPSMP27AHM3/85A?
The "HM3" denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance; "85A" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 10,000 units - optimized for high-volume SMT assembly lines requiring minimal changeover and verified moisture sensitivity compliance (MSL Level 1).
How does TPSMP27AHM3/85A compare to bidirectional TVS diodes in the same package?
TPSMP27AHM3/85A is unidirectional and optimized for DC power line protection where polarity is fixed; it offers lower leakage (<1.0 µA at VWM) and higher surge capability (400 W) than comparable bidirectional devices. Bidirectional variants like TPSMP27AHM3/85A-B would sacrifice leakage performance and clamping precision for AC or floating-line applications - which TPSMP27AHM3/85A does not support.
Can TPSMP27AHM3/85A replace older SMAJ28A parts in existing designs?
TPSMP27AHM3/85A is not a direct pin-compatible replacement for SMAJ28A due to different package footprints (DO-220AA vs. DO-214AC). While both offer 400 W surge rating, TPSMP27AHM3/85A requires PCB layout revision to accommodate its smaller 2.54 mm lead pitch and 1.0 mm height - but delivers superior thermal performance and automotive qualification that SMAJ28A lacks.
TPSMP27AHM3/85A 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 10.7A
- 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)
TPSMP27AHM3/85A FAQ
1.How can I place an order for TPSMP27AHM3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP27AHM3/85A 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 TPSMP27AHM3/85A reliable?
The price and inventory of TPSMP27AHM3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMP27AHM3/85A is usually 5 days.
3.What payment methods are accepted for TPSMP27AHM3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP27AHM3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP27AHM3/85A?
TPSMP27AHM3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP27AHM3/85A 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 TPSMP27AHM3/85A?
For technical support, including TPSMP27AHM3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP27AHM3/85A requirements.
6.How does Aetrix verify that TPSMP27AHM3/85A is sourced from the original manufacturer or authorized distributors?
All TPSMP27AHM3/85A 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 TPSMP27AHM3/85A meets industry standards.
7.What is the process for return or replacement of TPSMP27AHM3/85A?
All TPSMP27AHM3/85A units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP27AHM3/85A, 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 TPSMP27AHM3/85A part is unused and in its original packaging.
Return procedure for TPSMP27AHM3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMP27AHM3/85A Tags
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