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Vishay General Semiconductor - Diodes Division TPSMP20AHM3/85A
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- Part No.:
- TPSMP20AHM3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP20AHM3/85A.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,945
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Product details
Overview
TPSMP20AHM3/85A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-220AA (SMP) package, designed for high-reliability overvoltage protection of signal lines and power rails. It features 20 V nominal breakdown voltage (VBR = 19.0–21.0 V), 400 W peak pulse power (10/1000 µs), 14.4 A peak pulse current (IPPM), and clamps to ≤27.7 V at rated surge. It is AEC-Q101 qualified and rated for automotive-grade operation up to TJ = 185 °C.
For engineers reviewing the TPSMP20AHM3/85A datasheet, TPSMP20AHM3/85A pinout, TPSMP20AHM3/85A application, or TPSMP20AHM3/85A equivalent, this device serves as a compact, high-power-density solution for ESD and surge protection in automotive sensor interfaces, industrial I/O modules, and consumer power supply inputs where low-profile mounting and MSL Level 1 reflow compatibility are required.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD (IEC 61000-4-2) and lightning-induced transients (IEC 61000-4-5). Its unidirectional configuration provides forward conduction capability with VF = 2.5 V at 25 A, supporting bidirectional protection schemes when paired with complementary devices.
The DO-220AA package delivers high power density with only 1.0 mm typical height and meets UL 94 V-0 flammability rating. The HM3 suffix confirms halogen-free, RoHS-compliant construction and JESD 201 Class 2 whisker resistance - critical for automated SMT assembly in automotive production environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.0 V / 21.0 V - ensures reliable triggering above 17.1 V stand-off while avoiding false trips during normal 16.2 V operating conditions |
| VC @ IPPM | ≤27.7 V - clamping voltage limits downstream IC stress during 14.4 A 10/1000 µs surge events |
| PPPM | 400 W - supports robust protection against high-energy transients in 12 V/24 V automotive systems |
| IFSM | 40 A - withstands repetitive 10 ms half-sine surges without degradation, suitable for load-dump scenarios |
| TJ max | +185 °C - enables placement near hot components (e.g., power MOSFETs, DC/DC converters) without derating |
| Package | DO-220AA (SMP) - 1.0 mm height allows use in space-constrained modules; compatible with standard 7" and 13" tape-and-reel feeders |
Pinout & Package
DO-220AA (SMP) surface-mount package with cathode indicated by color band; matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102; meets MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current input / surge return path | Connected to protected line (e.g., CAN_H, LIN, sensor VOUT) when used in unidirectional configuration |
| Cathode | Clamping node / reference connection | Connected to ground or lower-potential rail; color band identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and infotainment applications requiring zero field failures over 15-year service life |
| 185 °C junction rating | Enables direct placement adjacent to power stages without thermal derating or heatsinking |
| Low profile (1.0 mm height) | Permits integration into ultra-thin modules such as ADAS camera housings and compact ECUs |
| MSL Level 1 rating | Eliminates pre-bake requirement before reflow, reducing manufacturing cost and cycle time |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental compliance mandates including China RoHS II and EU Directive 2011/65/EU |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) of engine coolant temperature sensors exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤27.7 V during 400 W surges, preventing ADC saturation and protecting internal ESD structures of automotive-grade MCUs. |
Use Scenario: Guarding digital input channels on programmable logic controller (PLC) modules interfacing with 24 V DC field devices subject to inductive kickback. IC Role / Device Role / Timing Role: Primary surge suppression device mounted at connector entry point before optocoupler isolation stage. Use Value: Absorbs 14.4 A peak pulses without degradation, maintaining signal integrity and eliminating need for secondary protection stages. |
| Consumer Power Supply Input | Automotive LIN Bus Protection |
|
Use Scenario: Safeguarding AC/DC adapter primary-side rectifier outputs against line transients and capacitor discharge spikes in smart home hubs. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across bulk capacitor to clamp overvoltage before it reaches switching controller. Use Value: Withstands 40 A non-repetitive forward surge (IFSM), ensuring reliability during repeated plug/unplug events and brownout recovery. |
Use Scenario: Protecting LIN transceiver pins (LIN_H/L) in body control modules from battery reverse polarity and ESD events during service operations. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN bus line and ground to shunt negative transients while preserving signal swing. Use Value: Clamps to ≤27.7 V within <1 ns, preventing latch-up in LIN PHY ICs and maintaining bus communication integrity during 8 kV contact ESD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | DO-214AC package; 400 W PPPM; VBR = 22.2–24.5 V; higher clamping voltage (VC = 32.4 V) | Larger footprint (2.79 mm height); less suitable for ultra-thin automotive modules | Preferred where board space permits and higher clamping margin is acceptable |
| TPSMP20AHE3/85A | Same DO-220AA package and electrical specs; HE3 suffix indicates different reel packaging (13" reel, 10,000 pcs) vs. HM3/85A (13" reel, 10,000 pcs, halogen-free) | No functional difference; identical performance and qualification | Select HM3/85A for halogen-free compliance; HE3/85A if alternate sourcing is needed |
Compared with SMAJ20A, TPSMP20AHM3/85A offers 4.7 V lower clamping voltage and 1.79 mm lower profile - critical for protecting sensitive 3.3 V/5 V logic in tight spaces. Against TPSMP20AHE3/85A, it guarantees halogen-free material content per JEDEC J-STD-203, making it mandatory for Tier 1 automotive BOMs with strict chemical compliance requirements.
Availability
TPSMP20AHM3/85A is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and consumer power supply inputs requiring stable component supply across multi-year production cycles.
Supply support for TPSMP20AHM3/85A 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, and passive components for automotive, industrial, and computing markets.
The TPSMP series belongs to Vishay's PAR® (Protective Array Rectifier) family - engineered specifically for high-power-density transient suppression in space-constrained, high-temperature automotive and industrial environments.
FAQ
What is the breakdown voltage tolerance for TPSMP20AHM3/85A?
The TPSMP20AHM3/85A has a breakdown voltage range of 19.0 V to 21.0 V at test current IT = 1.0 mA, corresponding to a ±5 % tolerance. This is confirmed in the Electrical Characteristics table on page 2 of Vishay document 88471, where "TPSMP20A" is explicitly listed with marking code "BGP" and VBR min/max values.
Is TPSMP20AHM3/85A suitable for bidirectional transient protection?
No - TPSMP20AHM3/85A is unidirectional only, as stated in the FEATURES section of the datasheet. It conducts in forward bias and clamps reverse transients. For bidirectional protection, two TPSMP20AHM3/85A devices must be connected in series opposition, or a dedicated bidirectional TVS (e.g., TPSMD20A) should be selected.
Does TPSMP20AHM3/85A meet AEC-Q101 stress test requirements?
Yes - the datasheet explicitly states "AEC-Q101 qualified" in the FEATURES section and notes "(1) Automotive grade" in the Ratings and Characteristics Curves section. This qualification covers stress tests including HTGB, HTRB, TCT, and ESD per AEC-Q101 Rev D, validated for automotive under-hood and cabin applications.
What is the maximum clamping voltage of TPSMP20AHM3/85A at its rated peak pulse current?
The maximum clamping voltage (VC) of TPSMP20AHM3/85A is 27.7 V at IPPM = 14.4 A with a 10/1000 µs waveform, as specified in the Electrical Characteristics table on page 2 of Vishay document 88471 under the "TPSMP20A" row.
Can TPSMP20AHM3/85A be used in reflow soldering processes without preconditioning?
Yes - TPSMP20AHM3/85A meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. No baking or dry-pack handling is required prior to standard lead-free reflow profiles, simplifying SMT line integration and reducing process risk.
TPSMP20AHM3/85A 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 14.4A
- 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)
TPSMP20AHM3/85A FAQ
1.How can I place an order for TPSMP20AHM3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP20AHM3/85A 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 TPSMP20AHM3/85A reliable?
The price and inventory of TPSMP20AHM3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMP20AHM3/85A is usually 5 days.
3.What payment methods are accepted for TPSMP20AHM3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP20AHM3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP20AHM3/85A?
TPSMP20AHM3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP20AHM3/85A 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 TPSMP20AHM3/85A?
For technical support, including TPSMP20AHM3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP20AHM3/85A requirements.
6.How does Aetrix verify that TPSMP20AHM3/85A is sourced from the original manufacturer or authorized distributors?
All TPSMP20AHM3/85A 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 TPSMP20AHM3/85A meets industry standards.
7.What is the process for return or replacement of TPSMP20AHM3/85A?
All TPSMP20AHM3/85A units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP20AHM3/85A, 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 TPSMP20AHM3/85A part is unused and in its original packaging.
Return procedure for TPSMP20AHM3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMP20AHM3/85A Tags
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