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Vishay General Semiconductor - Diodes Division TPSMP20HM3/85A
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- Part No.:
- TPSMP20HM3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP20HM3/85A.pdf
- Description:
- TVS DIODE 16.2VWM 29.1VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,696
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Product details
Overview
TPSMP20HM3/85A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-220AA (SMP) package, designed for high-reliability overvoltage protection of sensitive electronics. It features 20 V breakdown voltage (VBR = 18.0–22.0 V), 400 W peak pulse power (10/1000 µs), 13.7 A peak pulse current (IPPM), and clamps to ≤29.1 V at rated surge - deployed in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the TPSMP20HM3/85A datasheet, TPSMP20HM3/85A pinout, TPSMP20HM3/85A application, or TPSMP20HM3/85A equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 185 °C junction rating, low-profile 1.0 mm height, and MSL Level 1 reflow compatibility - all critical for under-hood automotive and space-constrained industrial PCBs.
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, lightning-induced transients, and load-dump spikes. Its unidirectional configuration provides forward conduction capability while clamping reverse surges above VBR.
Rated for TJ = –65 °C to +185 °C and qualified per AEC-Q101, the device supports automotive-grade reliability without derating up to 150 °C ambient. The DO-220AA package delivers high power density with 2.5 W steady-state dissipation on infinite heatsink and meets UL 94 V-0 flammability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 18.0 V / 22.0 V - ensures reliable triggering above system operating voltage (16.2 V VWM) while avoiding false clamping during normal operation |
| PPPM | 400 W (10/1000 µs) - sustains high-energy transients common in 12 V automotive systems and industrial power rails |
| VC @ IPPM | ≤29.1 V - limits protected circuit voltage stress during worst-case surge, preserving downstream ICs rated ≤30 V |
| IFSM | 40 A (10 ms half-sine) - withstands repetitive inrush or fault currents without degradation |
| TJ max | +185 °C - enables placement near heat sources (e.g., power modules) without thermal derating in engine control units |
| Package | DO-220AA (SMP) - 1.0 mm typical height, compatible with automated SMT placement and J-STD-020 reflow (260 °C peak) |
| AEC-Q101 | Qualified - validated for automotive use including temperature cycling, humidity bias, and mechanical shock per AEC standard |
Pinout & Package
DO-220AA (SMP) surface-mount package: cathode-indicating band on one end; matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102; meets JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to protected line (e.g., CAN_H, LIN, sensor output); conducts during positive transients or forward faults |
| Cathode | Clamping node / reference connection | Connected to ground or lower-potential rail; defines clamping threshold and sinks surge current during reverse overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Passivated anisotropic rectifier technology | Enables stable VBR tolerance (±10 %) and low leakage (<1 μA at VWM) across temperature and lifetime |
| 185 °C junction rating | Supports operation in under-hood environments without thermal shutdown or parameter drift in engine control modules |
| 1.0 mm profile | Reduces board space and enables placement adjacent to connectors or sensors where vertical clearance is constrained |
| MSL Level 1 (260 °C peak) | Eliminates pre-bake requirements and allows single-pass reflow with standard lead-free profiles |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates for automotive and industrial OEM supply chains |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog outputs of pressure, temperature, and position sensors in engine management and ADAS subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient-induced ADC saturation or latch-up by clamping to ≤29.1 V while maintaining <1 μA leakage at 16.2 V standby. |
Use Scenario: Safeguarding RS-485/RS-232 transceivers and PLC digital inputs against EFT and surge events in factory automation. IC Role / Device Role / Timing Role: Line-side TVS connected between data line and chassis ground to shunt induced noise energy. Use Value: Withstands 400 W pulses without degradation, ensuring >100,000 surge cycles in harsh industrial environments. |
| Automotive LIN Bus | Consumer Power Adapter Input |
Use Scenario: Securing LIN transceiver pins against battery dump and jump-start transients in body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed on LIN bus line with cathode to ground, anode to bus. Use Value: Fast response (<1 ns) and low VC prevent bus lockup during 12 V system load-dump events up to 35 V. |
Use Scenario: Input-stage surge protection for AC-DC adapters powering smart home devices and IoT gateways. IC Role / Device Role / Timing Role: Primary TVS on DC input rail upstream of buck converter, referenced to local ground. Use Value: 40 A IFSM rating handles repeated inrush surges; DO-220AA footprint allows compact layout without compromising creepage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same VBR range (18.0–22.0 V), but SMA package (2.5 mm height); 400 W PPPM, higher VC (32.4 V) | Less suitable for ultra-low-profile designs; requires larger pad area and higher reflow thermal mass | Choose SMAJ20A only if DO-220AA footprint is unavailable and board height >2.0 mm is acceptable |
| TPSMA6.8A | Lower VBR (6.45–7.14 V); same DO-220AA package; 300 W PPPM; AEC-Q101 qualified | Designed for 5 V logic and USB interface protection, not 12–24 V automotive power domains | Use TPSMA6.8A only for sub-10 V signal-line protection; not interchangeable with TPSMP20HM3/85A due to VBR mismatch |
Compared with SMAJ20A and TPSMA6.8A, TPSMP20HM3/85A uniquely combines 20 V clamping headroom, 1.0 mm height, and AEC-Q101 validation - making it optimal for next-generation compact automotive ECUs where thermal margin and board space are simultaneously constrained.
Availability
TPSMP20HM3/85A is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and LIN bus safeguarding requiring stable component supply across multi-year production programs.
Supply support for TPSMP20HM3/85A 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 eSMP® family of high-power-density TVS diodes, engineered specifically for AEC-Q101-compliant overvoltage protection in space- and thermally-constrained automotive electronics.
FAQ
What is the breakdown voltage tolerance for TPSMP20HM3/85A?
The TPSMP20HM3/85A has a specified breakdown voltage range of 18.0 V to 22.0 V at 1.0 mA test current, corresponding to a ±10 % tolerance. This tolerance is verified per ANSI/IEEE C62.35 and ensures consistent clamping behavior across production lots and temperature extremes from –65 °C to +185 °C. The device maintains this specification under automotive-grade qualification testing.
Is TPSMP20HM3/85A suitable for bidirectional transient protection?
No, TPSMP20HM3/85A is strictly unidirectional and must be used with correct polarity - cathode connected to ground or reference rail, anode to protected line. It does not provide symmetrical clamping for both positive and negative transients. For bidirectional protection, a separate device such as TPSMP20HMM3/85A (if available) or a dedicated bidirectional TVS like SMBJ20CA would be required.
Does TPSMP20HM3/85A require derating at elevated ambient temperatures?
Yes - the peak pulse power (PPPM) must be derated linearly above 25 °C ambient, per Figure 2 in the datasheet. At 85 °C ambient, PPPM is reduced to ~70 % of its 25 °C value (i.e., ~280 W). Steady-state power dissipation (PD = 2.5 W) also follows the derating curve in Figure 6, dropping to zero at 175 °C case temperature.
What is the maximum clamping voltage of TPSMP20HM3/85A under surge conditions?
The maximum clamping voltage (VC) of TPSMP20HM3/85A is 29.1 V when subjected to its rated peak pulse current of 13.7 A (10/1000 µs waveform). This value is measured at IPPM and guarantees that protected circuitry downstream will not experience voltages exceeding 29.1 V during standardized surge events - critical for safeguarding 30 V-rated automotive microcontrollers and transceivers.
How is the DO-220AA package of TPSMP20HM3/85A mounted on PCB?
TPSMP20HM3/85A uses a two-terminal DO-220AA (SMP) package with matte tin-plated leads, designed for standard SMT reflow per J-STD-020 (MSL Level 1, 260 °C peak). Mounting requires 5.0 mm × 5.0 mm copper pads per terminal as specified in the datasheet for thermal and surge performance. The cathode is marked by a color band, and polarity must be verified before placement.
TPSMP20HM3/85A 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):
- 16.2V
- Voltage - Breakdown (Min):
- 18V
- Voltage - Clamping (Max) @ Ipp:
- 29.1V
- Current - Peak Pulse (10/1000µs):
- 28.8A
- 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)
TPSMP20HM3/85A FAQ
1.How can I place an order for TPSMP20HM3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP20HM3/85A 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 TPSMP20HM3/85A reliable?
The price and inventory of TPSMP20HM3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMP20HM3/85A is usually 5 days.
3.What payment methods are accepted for TPSMP20HM3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP20HM3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP20HM3/85A?
TPSMP20HM3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP20HM3/85A 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 TPSMP20HM3/85A?
For technical support, including TPSMP20HM3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP20HM3/85A requirements.
6.How does Aetrix verify that TPSMP20HM3/85A is sourced from the original manufacturer or authorized distributors?
All TPSMP20HM3/85A 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 TPSMP20HM3/85A meets industry standards.
7.What is the process for return or replacement of TPSMP20HM3/85A?
All TPSMP20HM3/85A units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP20HM3/85A, 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 TPSMP20HM3/85A part is unused and in its original packaging.
Return procedure for TPSMP20HM3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMP20HM3/85A Tags
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