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Vishay General Semiconductor - Diodes Division TPSMP33AHM3/85A
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- Part No.:
- TPSMP33AHM3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP33AHM3/85A.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,611
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Product details
Overview
TPSMP33AHM3/85A 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 31.4 V to 34.7 V breakdown voltage (VBR), 45.7 V clamping voltage (VC) at 8.8 A peak pulse current, 400 W peak pulse power rating, and operates up to +185 °C junction temperature - ideal for automotive power line and sensor interface protection.
For engineers reviewing the TPSMP33AHM3/85A datasheet, TPSMP33AHM3/85A pinout, TPSMP33AHM3/85A application, or TPSMP33AHM3/85A equivalent, key selection criteria include unidirectional polarity, DO-220AA (SMP) package compatibility with automated placement, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and low-profile 1.0 mm height for space-constrained PCB layouts.
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 ESD, lightning-induced surges, and inductive switching transients. Its unidirectional configuration provides forward conduction path during overvoltage events while maintaining low leakage (<1 μA at VWM = 28.2 V) under normal operation.
The device is rated for 40 A non-repetitive forward surge current (IFSM) and dissipates 2.5 W continuously at 75 °C ambient on infinite heatsink. Thermal design must account for derating above 25 °C per Fig. 2, and PCB layout requires 5.0 mm × 5.0 mm copper pads per terminal to meet specified PPPM ratings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V - ensures reliable triggering above system operating voltage (28.2 V VWM) without false clamping |
| VC @ IPPM | 45.7 V at 8.8 A - limits protected circuit voltage during 10/1000 µs surge to safe levels for 3.3 V–24 V ICs |
| PPPM | 400 W - supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges |
| IFSM | 40 A - withstands repetitive load dump events common in 12 V automotive systems |
| TJ max | +185 °C - enables deployment in engine bay and under-hood applications without thermal derating penalties |
| Package | DO-220AA (SMP) - 1.0 mm profile allows placement beneath connectors and in tight board-to-board spaces |
| AEC-Q101 | Qualified - meets stress test requirements for automotive electronic components including HTOL, TCT, and ESD |
Pinout & Package
TPSMP33AHM3/85A is housed in a surface-mount DO-220AA (SMP) package with cathode indicated by a color band. The two-terminal construction supports simple series connection across protected lines. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side of protected circuit | Connected to signal or power line requiring transient suppression; conducts during reverse-biased overvoltage |
| Cathode | Return/GND side of protected circuit | Marked with color band; ties to system ground or lower-potential rail to complete clamping path |
Key Features
| Feature | Design Value |
|---|---|
| Passivated anisotropic rectifier technology | Enables stable VBR tolerance (±5 %) and low dynamic impedance for consistent clamping performance across temperature |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning or special handling |
| Halogen-free, RoHS-compliant | Meets environmental compliance requirements for automotive and industrial end equipment |
| Low-profile 1.0 mm height | Reduces mechanical interference with mating connectors and shields in stacked PCB assemblies |
| Junction temperature rating +185 °C | Eliminates need for thermal derating in under-hood environments where ambient exceeds 125 °C |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and jump-start transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges before reaching DC/DC converters and microcontrollers. Use Value: Withstands 40 A IFSM and 400 W PPPM, ensuring survival through repeated 35 V/100 ms load dump pulses without degradation. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: TVS connected across signal and return lines to divert sub-100 ns ESD strikes away from precision op-amps and ADC front-ends. Use Value: 45.7 V clamping voltage prevents damage to 24 V-rated signal conditioning ICs while maintaining <1 μA leakage at 28.2 V stand-off. |
| Consumer USB Port Protection | Telecom Power Feeding Circuit |
Use Scenario: Safeguarding USB-C VBUS lines in portable docking stations exposed to hot-plug and adapter fault conditions. IC Role / Device Role / Timing Role: Unidirectional TVS placed inline with VBUS to absorb 8 kV contact ESD (IEC 61000-4-2) and 10/1000 µs surges from faulty AC adapters. Use Value: Fast response time and 1.0 mm profile allow integration directly at connector footprint without compromising mechanical clearance. | Use Scenario: Protecting PoE-powered devices (e.g., IP cameras) from induced surges on 48 V DC feeding lines in outdoor installations. IC Role / Device Role / Timing Role: TVS installed across input terminals of PD controller ICs to limit transient energy entering IEEE 802.3af/at compliant circuits. Use Value: AEC-Q101 qualification and +185 °C TJ rating ensure long-term reliability in unventilated enclosures subject to solar heating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/57T | DO-214AC (SMA) package; 33 V VBR min/max = 36.7–40.4 V; 300 W PPPM; 1.9 mm height | Lower power rating and taller profile limit use in space-constrained automotive modules | Select when legacy SMA footprint compatibility is required and 300 W surge capacity suffices |
| TPSMA6.8A-Q | Same DO-220AA package but 6.8 V VBR; 300 W PPPM; AEC-Q101 qualified; 1.0 mm height | Designed for low-voltage logic and data lines, not 24–48 V power rails | Choose only for sub-12 V signal-level protection where lower clamping voltage is critical |
Compared with SMAJ33A-E3/57T and TPSMA6.8A-Q, the TPSMP33AHM3/85A delivers higher 400 W surge capability in the same low-profile DO-220AA footprint, making it optimal for next-generation automotive and industrial power rail protection where both space and ruggedness are constrained.
Availability
TPSMP33AHM3/85A is available at Aetrix Electronics and suitable for automotive control units, industrial sensor transmitters, telecom power feeding circuits, and consumer docking station designs requiring stable component supply across extended production lifecycles.
Supply support for TPSMP33AHM3/85A 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, MOSFETs, and TVS devices for high-reliability applications.
The TPSMP33AHM3/85A belongs to Vishay's eSMP® Series of high-power-density TVS diodes engineered specifically for AEC-Q101-compliant automotive and harsh-environment industrial protection.
FAQ
What is the exact breakdown voltage range for TPSMP33AHM3/85A?
The TPSMP33AHM3/85A has a guaranteed breakdown voltage (VBR) range of 31.4 V to 34.7 V at 1.0 mA test current, as specified in the Vishay datasheet Document Number 88471. This ±5 % tolerance ensures precise triggering above the 28.2 V maximum stand-off voltage (VWM) while avoiding premature conduction during normal operation.
Is TPSMP33AHM3/85A suitable for bidirectional signal line protection?
No, the TPSMP33AHM3/85A is a unidirectional TVS diode and must be used only in applications where polarity is fixed - such as DC power rails or single-ended analog outputs. For bidirectional protection (e.g., RS-485, USB D+/D−), a dedicated bidirectional variant like TPSMP33AHM3/85A's counterpart with symmetrical clamping is required; this part does not provide reverse-direction surge suppression.
Does TPSMP33AHM3/85A require special PCB layout considerations?
Yes - to achieve its rated 400 W peak pulse power, the TPSMP33AHM3/85A must be mounted on FR-4 PCB with 5.0 mm × 5.0 mm copper pads attached to each terminal, as defined in the datasheet. Smaller pads reduce heat dissipation and cause premature failure under surge conditions; thermal vias under pads are recommended for high-reliability automotive deployments.
What does the "HM3/85A" suffix indicate in TPSMP33AHM3/85A?
The "HM3" denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "85A" specifies packaging in 13-inch diameter plastic tape and reel with 10,000 units per reel. This differs from "84A" (7-inch reel, 3000 units) and confirms full compliance with automotive supply chain traceability requirements.
How does TPSMP33AHM3/85A perform under high-temperature operating conditions?
The TPSMP33AHM3/85A maintains full functionality up to +185 °C junction temperature and is characterized for derated surge performance above 25 °C ambient per Figure 2 in the datasheet. At 125 °C board temperature, its 400 W PPPM rating remains usable for short-duration transients, supporting deployment in engine control modules without external heatsinking.
TPSMP33AHM3/85A 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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 8.8A
- 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)
TPSMP33AHM3/85A FAQ
1.How can I place an order for TPSMP33AHM3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP33AHM3/85A 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 TPSMP33AHM3/85A reliable?
The price and inventory of TPSMP33AHM3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMP33AHM3/85A is usually 5 days.
3.What payment methods are accepted for TPSMP33AHM3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP33AHM3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP33AHM3/85A?
TPSMP33AHM3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP33AHM3/85A 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 TPSMP33AHM3/85A?
For technical support, including TPSMP33AHM3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP33AHM3/85A requirements.
6.How does Aetrix verify that TPSMP33AHM3/85A is sourced from the original manufacturer or authorized distributors?
All TPSMP33AHM3/85A 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 TPSMP33AHM3/85A meets industry standards.
7.What is the process for return or replacement of TPSMP33AHM3/85A?
All TPSMP33AHM3/85A units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP33AHM3/85A, 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 TPSMP33AHM3/85A part is unused and in its original packaging.
Return procedure for TPSMP33AHM3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMP33AHM3/85A Tags
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