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Vishay General Semiconductor - Diodes Division TPSMC18AHE3/57T
- Part No.:
- TPSMC18AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
TPSMC18AHE3/57T.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,341
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Product details
Overview
TPSMC18AHE3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-reliability overvoltage protection of sensitive electronics. It features a 18.0 V nominal breakdown voltage (VBR), 15.3 V stand-off voltage (VWM), 1500 W peak pulse power (10/1000 µs), 59.5 A peak pulse current (IPPM), and clamps to 25.2 V at IPPM. It is used to protect MOSFETs, ICs, and sensor signal lines in automotive power systems and industrial control interfaces.
For engineers reviewing the TPSMC18AHE3/57T datasheet, TPSMC18AHE3/57T pinout, TPSMC18AHE3/57T application, or TPSMC18AHE3/57T equivalent, key selection considerations include its AEC-Q101 qualification, 185 °C maximum junction temperature, unidirectional polarity, low clamping ratio (25.2 V / 18.0 V = 1.40), and compatibility with automated SMT assembly under J-STD-002 solderability standards.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for junction stability under repetitive surge stress. Its 10/1000 µs waveform rating reflects standardized lightning/surge immunity testing per ANSI/IEEE C62.35, and its 185 °C TJ max enables operation in under-hood automotive environments without derating penalties up to that temperature.
The device exhibits a positive temperature coefficient of breakdown voltage (αT = 0.080 %/°C), enabling predictable VBR drift across temperature. Its low incremental surge resistance and fast response time ensure effective clamping before downstream components experience damaging overvoltage-critical for protecting gate oxides in power MOSFETs and input stages of analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - ensures reliable triggering above system operating voltage while maintaining margin against false trips |
| VWM | 15.3 V - maximum continuous reverse voltage the device blocks without significant leakage |
| IPPM | 59.5 A - peak surge current it safely shunts during a 10/1000 µs transient event |
| VC @ IPPM | 25.2 V - clamped voltage seen by protected circuit during full-rated surge, limiting stress on downstream components |
| PPPM | 1500 W - peak pulse power dissipation capability under standardized surge waveform |
| TJ max | +185 °C - enables use in high-temperature automotive and industrial locations without thermal derating |
| Leakage @ VWM | 1.0 µA - ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits |
Pinout & Package
TPSMC18AHE3/57T uses the SMC (DO-214AB) surface-mount package: molded epoxy case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1, and compatible with reflow profiles peaking at 260 °C. Polarity is marked by a cathode band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or surge clamping | Connected to protected line (e.g., power rail or signal trace) requiring overvoltage suppression |
| Cathode | Current exit point during clamping; referenced to system ground or return path | Typically tied to ground plane or low-impedance return to complete clamping path and minimize loop inductance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22-A114 |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive applications |
| Clamping voltage 25.2 V @ 59.5 A | Provides 2.2× margin over 12 V nominal automotive supply, protecting 3.3 V/5 V logic inputs via series impedance |
| 185 °C maximum junction temperature | Supports placement near heat sources (e.g., power converters) without thermal shutdown or parameter shift |
| Low 1.0 µA leakage @ 15.3 V | Minimizes standby current draw in battery-powered sensor nodes and telematics modules |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs and body control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges exceeding 25 V. Use Value: Clamps to 25.2 V within nanoseconds, preventing damage to 36 V-rated DC-DC controllers and CAN transceivers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC I/O modules exposed to field wiring transients. IC Role / Device Role / Timing Role: TVS connected across differential signal pair (e.g., 4–20 mA loop) to absorb induced common-mode spikes. Use Value: 1.0 µA leakage avoids loading precision current loops; 25.2 V clamping protects op-amp inputs rated for ±30 V absolute maximum. |
| Consumer Device USB Port Protection | Telecom Base Station DC Power Input |
Use Scenario: Overvoltage protection on VBUS line of USB-C ports in portable monitors and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to suppress ESD and hot-swap overshoot. Use Value: 15.3 V VWM allows safe operation across USB PD 9 V/15 V profiles; 25.2 V clamping prevents damage to USB PD controllers. | Use Scenario: Front-end surge suppression on -48 V DC telecom power feeds entering base station cabinets. IC Role / Device Role / Timing Role: TVS configured in reverse-biased orientation across -48 V rail and return to clamp negative-going transients. Use Value: 185 °C rating supports operation inside sealed outdoor enclosures; 1500 W rating handles multi-kA lightning-induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Lower peak power (400 W), same SMC package, identical VBR range but higher VC (29.2 V) | Not AEC-Q101 qualified; suitable only for commercial-grade consumer or industrial equipment | Select when cost sensitivity outweighs automotive qualification and 1500 W surge headroom is unnecessary |
| TPSMC18AHM3/57T | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same RoHS compliance | Required for strict environmental compliance programs (e.g., EU automotive Tier 1 supply chain) | Choose when halogen-free material declaration is mandated, otherwise TPSMC18AHE3/57T is functionally interchangeable |
Compared with SMAJ18A and TPSMC18AHM3/57T, the TPSMC18AHE3/57T delivers superior surge robustness (1500 W vs. 400 W), automotive qualification, and lower clamping voltage-making it optimal for safety-critical 12 V systems where thermal margin and transient headroom are design priorities.
Availability
TPSMC18AHE3/57T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power distribution systems requiring stable component supply and long-term lifecycle support.
Supply support for TPSMC18AHE3/57T 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, TVS devices, and optoelectronics with emphasis on reliability and high-temperature performance.
The TPSMC18AHE3/57T belongs to Vishay's PAR® family of high-power surface-mount TVS diodes, engineered specifically for automotive and industrial applications demanding AEC-Q101 qualification, 185 °C operation, and robust 10/1000 µs surge handling.
FAQ
What is the breakdown voltage tolerance of the TPSMC18AHE3/57T?
The TPSMC18AHE3/57T has a specified breakdown voltage (VBR) range of 17.1 V (minimum) to 18.9 V (maximum) at 1 mA test current, with 18.0 V as the nominal value. This ±5.6% tolerance ensures consistent triggering behavior across production lots while allowing margin for temperature drift and manufacturing variation. The device maintains this specification across its full operating temperature range, verified per ANSI/IEEE C62.35 test methods.
Is the TPSMC18AHE3/57T suitable for bidirectional transient protection?
No, the TPSMC18AHE3/57T is unidirectional only, as confirmed in the Vishay datasheet revision 19-Jan-2024. It conducts in reverse bias during overvoltage events and blocks forward current up to 3.5 V at 100 A. For bidirectional protection, a separate symmetric TVS array or back-to-back configuration would be required. Using TPSMC18AHE3/57T in bidirectional applications risks failure during positive transients on the anode side.
Does the TPSMC18AHE3/57T require a heatsink in standard PCB layouts?
No, the TPSMC18AHE3/57T does not require an external heatsink under typical surge conditions. Its 1500 W peak pulse rating assumes mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, which provides sufficient thermal mass for transient energy dissipation. Continuous power dissipation is negligible due to low leakage (<1 µA), so steady-state heating is not a concern. Thermal design focus should instead be on minimizing trace inductance in the clamping path.
What is the meaning of the "HE3" suffix in TPSMC18AHE3/57T?
The "HE3" suffix in TPSMC18AHE3/57T indicates RoHS-compliant construction and AEC-Q101 qualification, per Vishay's ordering nomenclature. The "H" denotes tape-and-reel packaging (7" diameter), "E3" specifies matte tin plating meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance. The "57T" is a date/batch code per Vishay internal traceability standards-not a functional variant.
How does the TPSMC18AHE3/57T perform at elevated ambient temperatures?
The TPSMC18AHE3/57T maintains full 1500 W surge capability up to +125 °C ambient, with linear derating to ~750 W at +175 °C, per Figure 2 in the datasheet. Its 185 °C maximum junction temperature and +0.080 %/°C VBR temperature coefficient ensure predictable clamping behavior across automotive under-hood environments. No design derating is needed below +125 °C ambient.
TPSMC18AHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
TPSMC18AHE3/57T FAQ
1.How can I place an order for TPSMC18AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMC18AHE3/57T 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 TPSMC18AHE3/57T reliable?
The price and inventory of TPSMC18AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMC18AHE3/57T is usually 5 days.
3.What payment methods are accepted for TPSMC18AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMC18AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMC18AHE3/57T?
TPSMC18AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMC18AHE3/57T 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 TPSMC18AHE3/57T?
For technical support, including TPSMC18AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMC18AHE3/57T requirements.
6.How does Aetrix verify that TPSMC18AHE3/57T is sourced from the original manufacturer or authorized distributors?
All TPSMC18AHE3/57T 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 TPSMC18AHE3/57T meets industry standards.
7.What is the process for return or replacement of TPSMC18AHE3/57T?
All TPSMC18AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with TPSMC18AHE3/57T, 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 TPSMC18AHE3/57T part is unused and in its original packaging.
Return procedure for TPSMC18AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMC18AHE3/57T Tags
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