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Vishay General Semiconductor - Diodes Division TPSMP20AHE3/85A
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- Part No.:
- TPSMP20AHE3/85A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
TPSMP20AHE3/85A.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,848
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Product details
Overview
TPSMP20AHE3/85A from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in DO-220AA (SMP) package, with 19.0–21.0 V breakdown voltage (VBR), 14.4 A peak pulse current (IPPM), 27.7 V clamping voltage (VC) at IPPM, and AEC-Q101 qualification for under-hood electronics protection.
For engineers reviewing the TPSMP20AHE3/85A datasheet, TPSMP20AHE3/85A pinout, TPSMP20AHE3/85A application, or TPSMP20AHE3/85A equivalent, key selection criteria include clamping performance under 10/1000 µs surge, low-profile mounting compatibility (1.0 mm height), RoHS-compliant matte tin terminations, and MSL Level 1 reflow capability up to 260 °C.
Technical Context
This TVS diode uses patented PAR oxide-passivated chip construction to achieve low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD and load-dump transients in automotive power rails and signal lines. Its unidirectional configuration provides forward conduction only during reverse-biased overvoltage events.
The device operates across -65 °C to +185 °C junction temperature range and delivers 400 W peak pulse power (10/1000 µs waveform) at VBR ≥13 V, with 2.5 W steady-state power dissipation on infinite heatsink at 75 °C ambient - optimized for high-reliability placement on FR-4 PCBs with 5.0 × 5.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.0 V / 21.0 V - defines precise reverse breakdown threshold for reliable triggering during overvoltage events |
| VC @ IPPM | 27.7 V - maximum clamped voltage seen by protected circuit during 14.4 A surge, limiting stress on downstream ICs |
| IPPM | 14.4 A - peak surge current handling capacity under standardized 10/1000 µs waveform |
| PPPM | 400 W - peak pulse power rating confirming suitability for automotive load-dump and ISO 7637-2 transient suppression |
| VWM | 17.1 V - maximum continuous reverse working voltage, ensuring no leakage conduction during normal operation |
| TJ max. | +185 °C - extended junction temperature rating supporting under-hood deployment without derating penalties |
| Package | DO-220AA (SMP) - ultra-low-profile surface-mount package (1.0 mm typical height) compatible with automated pick-and-place |
Pinout & Package
DO-220AA (SMP) package: single-body, two-terminal surface-mount device with cathode indicated by color band. Matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability standards; HE3 suffix confirms JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point during clamping | Connected to protected line (e.g., 12 V rail); conducts surge current toward ground when reverse voltage exceeds VBR |
| Cathode | Reverse-biased terminal during normal operation | Marked with color band; tied to system ground or low-impedance return path to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR oxide passivation | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| AEC-Q101 qualification | Validates robustness for automotive applications including engine control units, body controllers, and ADAS sensors |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow assembly without popcorn cracking or delamination risk |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive microcontrollers |
| 1.0 mm typical height | Reduces board space and profile constraints in compact modules such as infotainment head units and camera ECUs |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Input Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (ISO 7637-2 Pulse 5a) on 12 V battery-fed circuits in vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power input and ground to clamp surges above 17.1 V. Use Value: Limits peak voltage to 27.7 V during 14.4 A transients, preventing damage to LDO regulators and CAN transceivers downstream. |
Use Scenario: Protecting analog sensor inputs and digital communication pins in engine management systems exposed to ignition noise. IC Role / Device Role / Timing Role: Fast-response clamping element shunting ESD (IEC 61000-4-2) and coupled spikes from harness wiring. Use Value: Sub-1 ns response ensures clamping before transient energy reaches MCU GPIOs or ADC front-ends. |
| ADAS Camera Module Power Line | Body Control Module Signal Line Protection |
Use Scenario: Securing 5 V or 3.3 V power supply rails in rear-view or surround-view camera modules mounted near heat sources. IC Role / Device Role / Timing Role: High-temperature-rated TVS (TJ = +185 °C) placed at DC-DC converter output to absorb switching noise and hot-swap surges. Use Value: Maintains clamping performance across full automotive temperature range without derating loss. |
Use Scenario: Guarding LIN bus or PWM-controlled lighting outputs against inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA @ VWM) unidirectional suppressor connected between signal line and chassis ground. Use Value: Prevents false triggering of LIN transceivers while adding <0.1 µA standby current penalty. |
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 (SMA) package; 20 V VBR min/max = 22.2–24.5 V; lower PPPM = 400 W but higher VC = 32.4 V | Less suitable for tight-clamp designs due to 4.7 V higher clamping voltage than TPSMP20AHE3/85A | Select when legacy SMA footprint compatibility is required and clamping margin allows >32 V transient holdoff |
| SMCJ20A | DO-214AB (SMC) package; same VBR range but larger size (2.6 mm height); PPPM = 1500 W, VC = 32.4 V | Better surge energy handling but incompatible with low-profile layouts; not AEC-Q101 qualified | Choose for industrial non-automotive applications needing higher single-pulse energy absorption without height constraint |
Compared with SMAJ20A and SMCJ20A, TPSMP20AHE3/85A offers superior clamping (27.7 V vs. ≥32.4 V), AEC-Q101 qualification, and 1.0 mm height - making it optimal for space-constrained, high-reliability automotive power rail protection where voltage margin and thermal endurance are critical.
Availability
TPSMP20AHE3/85A is available at Aetrix Electronics and suitable for automotive power rail protection, engine control unit (ECU) input safeguarding, and ADAS camera module power line stabilization requiring stable component supply across production lifecycles.
Supply support for TPSMP20AHE3/85A 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 and passive components, specializing in high-reliability devices for automotive, industrial, and computing markets.
The TPSMP20AHE3/85A belongs to Vishay's eSMP™ Series of ultra-low-profile TVS diodes, engineered specifically for AEC-Q101-compliant transient suppression in next-generation automotive electronics with stringent space and thermal constraints.
FAQ
What is the breakdown voltage tolerance of TPSMP20AHE3/85A?
The TPSMP20AHE3/85A has a specified breakdown voltage (VBR) range of 19.0 V minimum to 21.0 V maximum at test current IT = 1.0 mA, corresponding to ±5.26 % tolerance about the nominal 20 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports precise overvoltage threshold design in automotive power systems.
Is TPSMP20AHE3/85A suitable for 12 V automotive battery line protection?
Yes, TPSMP20AHE3/85A is explicitly designed for 12 V automotive battery line protection. Its 17.1 V stand-off voltage (VWM) safely accommodates normal battery fluctuations (up to ~16 V during charging), while its 27.7 V clamping voltage limits transient stress during ISO 7637-2 Pulse 5a load-dump events. The AEC-Q101 qualification and +185 °C TJ max confirm suitability for under-hood deployment.
Does TPSMP20AHE3/85A have bidirectional capability?
No, TPSMP20AHE3/85A is a unidirectional TVS diode, as confirmed by Vishay documentation stating "Uni-direction only" and specifying polarity via cathode band marking. It conducts only during reverse-biased overvoltage conditions and must be oriented with cathode toward ground. For bidirectional protection, separate devices or dedicated bidirectional TVS families (e.g., TPSMD series) are required.
What is the maximum clamping voltage of TPSMP20AHE3/85A under surge conditions?
The maximum clamping voltage (VC) of TPSMP20AHE3/85A is 27.7 V, measured at peak pulse current IPPM = 14.4 A using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and forms the basis for calculating safe voltage margins for protected ICs such as CAN transceivers and microcontroller power inputs.
How does the DO-220AA (SMP) package of TPSMP20AHE3/85A compare to SMA or SMC packages?
The DO-220AA (SMP) package of TPSMP20AHE3/85A measures just 1.0 mm in typical height - significantly lower than DO-214AC (SMA, ~2.3 mm) and DO-214AB (SMC, ~2.6 mm). While sharing similar power ratings with SMAJ/SMCJ counterparts, its ultra-low profile enables use in space-constrained modules like camera ECUs and radar sensors where vertical clearance is limited, without sacrificing AEC-Q101 compliance or surge robustness.
TPSMP20AHE3/85A 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)
TPSMP20AHE3/85A FAQ
1.How can I place an order for TPSMP20AHE3/85A through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMP20AHE3/85A 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 TPSMP20AHE3/85A reliable?
The price and inventory of TPSMP20AHE3/85A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMP20AHE3/85A is usually 5 days.
3.What payment methods are accepted for TPSMP20AHE3/85A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMP20AHE3/85A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMP20AHE3/85A?
TPSMP20AHE3/85A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMP20AHE3/85A 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 TPSMP20AHE3/85A?
For technical support, including TPSMP20AHE3/85A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMP20AHE3/85A requirements.
6.How does Aetrix verify that TPSMP20AHE3/85A is sourced from the original manufacturer or authorized distributors?
All TPSMP20AHE3/85A 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 TPSMP20AHE3/85A meets industry standards.
7.What is the process for return or replacement of TPSMP20AHE3/85A?
All TPSMP20AHE3/85A units undergo pre-shipment inspection (PSI). If there is an issue with TPSMP20AHE3/85A, 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 TPSMP20AHE3/85A part is unused and in its original packaging.
Return procedure for TPSMP20AHE3/85A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMP20AHE3/85A Tags
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