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Vishay General Semiconductor - Diodes Division TPSMB18AHE3_A/I
- Part No.:
- TPSMB18AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB18AHE3_A/I.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,200
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Product details
Overview
TPSMB18AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive switching surges and lightning-induced transients on power rails and signal lines. It features a 18.0 V nominal breakdown voltage (VBR), 15.3 V maximum standoff voltage (VWM), 600 W peak pulse power (10/1000 µs), 23.8 A peak pulse current (IPPM), and 25.2 V maximum clamping voltage (VC) - deployed in automotive engine control units, industrial PLC I/O modules, and sensor interface protection.
For engineers reviewing the TPSMB18AHE3_A/I datasheet, TPSMB18AHE3_A/I pinout, TPSMB18AHE3_A/I application, or TPSMB18AHE3_A/I equivalent, this page delivers verified electrical parameters, SMB (DO-214AA) package dimensions, cathode/anode terminal mapping, AEC-Q101 qualification status, and real-world surge protection use cases - all confirmed against Vishay Document #88406 (Rev. 23-Jan-2024).
Technical Context
This TVS diode operates as a unidirectional clamping device with junction passivated anisotropic rectifier technology, enabling stable performance up to 185 °C junction temperature. Its low incremental surge resistance and fast response time ensure effective suppression of 10/1000 µs transients without thermal runaway under repetitive 0.01% duty cycle conditions.
The device is rated for 75 A non-repetitive forward surge current (8.3 ms half-sine), exhibits 3.5 V maximum forward voltage at 50 A, and maintains clamping integrity across -65 °C to +185 °C operating range - meeting JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - ensures reliable conduction onset above 15.3 V system standby voltage while accommodating ±5% tolerance drift |
| VWM | 15.3 V - maximum continuous reverse voltage before leakage exceeds 1 µA, compatible with 12 V automotive supply rails |
| VC @ IPPM | 25.2 V - clamps 23.8 A transient to safe level below 28 V absolute max rating of typical 24 V logic interfaces |
| PPPM | 600 W - sustains single 10/1000 µs surge without degradation when mounted on 5 mm × 5 mm copper pads |
| TJ max. | +185 °C - supports under-hood automotive placement and high-temperature industrial environments without derating |
| Polarity | Unidirectional - protects only against positive-going transients relative to cathode; requires correct orientation in series with protected line |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard |
Pinout & Package
Package: SMB (DO-214AA) surface-mount case with matte tin-plated leads, UL 94 V-0 molding compound, and cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); recommended pad layout per Vishay outline drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE > VBR |
| Anode | Reference node | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivated anisotropic rectifier | Enables stable VBR drift < ±0.08 %/°C and eliminates parametric shift after 1000+ surge cycles |
| 185 °C junction capability | Permits direct placement near heat-generating components (e.g., power MOSFETs, DC-DC inductors) without thermal derating |
| 600 W peak pulse power (10/1000 µs) | Handles ISO 7637-2 Pulse 1/2a/5a transients in 12 V vehicle systems without failure |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| MSL Level 1, 260 °C reflow | Supports standard SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VIN and GND to clamp transients exceeding 15.3 V. Use Value: Limits voltage excursion to ≤25.2 V during 200 A/100 ms load dump events, preventing MCU brownout or latch-up. |
Use Scenario: Shielding analog output lines of pressure sensors in factory automation systems from ESD and relay coil kickback. IC Role / Device Role / Timing Role: Series-connected TVS on 4–20 mA loop outputs to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity with <1 µA leakage at 15.3 V, ensuring <0.01% full-scale error in precision current loops. |
| Telecom DC Power Input Protection | Consumer Device USB Port Surge Suppression |
Use Scenario: Safeguarding PoE-powered network switches against induced surges on 48 V DC input derived from outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail upstream of DC-DC converter, oriented cathode-to-rail. Use Value: Withstands 600 W pulses without degradation, enabling compliance with ITU-T K.21 basic protection level for telecom infrastructure. |
Use Scenario: Adding secondary-level surge immunity to USB Type-A VBUS lines in smart home hubs exposed to AC adapter transients. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 200 pF at 0 V) placed between VBUS and GND to suppress fast-rising EFT bursts. Use Value: Clamps 1 kV/50 Ω EFT to <25.2 V within <1 ns, preserving USB 2.0 signal eye diagram integrity. |
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 (ON Semiconductor) | Same SMB package, 18 V VBR, but rated for 400 W PPPM and 18.2 A IPPM; no AEC-Q101 qualification | Limited to commercial/industrial use; unsuitable for automotive under-hood deployment | Select when cost sensitivity outweighs automotive qualification and 600 W headroom is unnecessary |
| 1.5SMC18A (Littelfuse) | Identical 18 V VBR, 600 W rating, but SMB package variant with higher VC = 29.2 V and wider VBR tolerance (±10%) | Higher clamping voltage reduces margin for 24 V systems; less precise VBR complicates design validation | Choose only if legacy BOM alignment or distributor stock availability drives selection over performance optimization |
Compared with SMAJ18A and 1.5SMC18A, the TPSMB18AHE3_A/I delivers tighter VBR tolerance (±5%), lower clamping voltage (25.2 V vs. ≥29.2 V), and certified AEC-Q101 reliability - making it the preferred choice for automotive and high-stability industrial designs where surge margin and long-term parametric stability are critical.
Availability
TPSMB18AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controller (PLC) I/O modules, and telecom power supply front-end protection requiring stable component supply, AEC-Q101 traceability, and high-temperature operational assurance.
Supply support for TPSMB18AHE3_A/I 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 high-reliability, high-temperature, and automotive-qualified solutions.
The TPSMB series was engineered specifically for robust transient suppression in harsh environments - targeting automotive subsystems, industrial controls, and telecom infrastructure where sustained operation at 185 °C and repeatable 600 W surge handling are mandatory.
FAQ
What is the exact breakdown voltage range for TPSMB18AHE3_A/I?
The TPSMB18AHE3_A/I has a guaranteed breakdown voltage (VBR) range of 17.1 V (minimum) to 18.9 V (maximum) at 1 mA test current, with 18.0 V nominal value. This ±5% tolerance is confirmed in Vishay Document #88406, Table on page 2, and applies strictly to the TPSMB18AHE3_A/I variant - not extrapolated from adjacent family members.
Is TPSMB18AHE3_A/I AEC-Q101 qualified?
Yes, TPSMB18AHE3_A/I is explicitly AEC-Q101 qualified, as stated in the "FEATURES" section and "ORDERING INFORMATION" table of Vishay Document #88406. The HE3 suffix denotes RoHS-compliant and AEC-Q101 qualified construction, validated for automotive applications including temperature cycling, HTRB, and ESD stress testing.
What is the maximum clamping voltage of TPSMB18AHE3_A/I at its rated peak pulse current?
The TPSMB18AHE3_A/I clamps to a maximum of 25.2 V when subjected to its rated 23.8 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per Figure 1 and Table on page 2 of Vishay Document #88406 and defines the upper voltage limit imposed on protected circuitry during surge events.
Does TPSMB18AHE3_A/I support bidirectional transient suppression?
No, TPSMB18AHE3_A/I is unidirectional only, as clearly specified in the "FEATURES" section of Vishay Document #88406. It conducts surge current only when the cathode is more positive than the anode - requiring correct polarity placement and excluding use in AC-coupled or bipolar signal paths without additional circuitry.
What is the thermal operating limit of TPSMB18AHE3_A/I?
The TPSMB18AHE3_A/I is rated for continuous operation from -65 °C to +185 °C junction temperature (TJ), with full electrical specifications guaranteed across this range. This 185 °C maximum enables deployment in high-heat zones such as engine compartments, motor drive enclosures, and industrial power supplies without thermal derating.
TPSMB18AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 23.8A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
TPSMB18AHE3_A/I FAQ
1.How can I place an order for TPSMB18AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB18AHE3_A/I 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 TPSMB18AHE3_A/I reliable?
The price and inventory of TPSMB18AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB18AHE3_A/I is usually 5 days.
3.What payment methods are accepted for TPSMB18AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB18AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB18AHE3_A/I?
TPSMB18AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB18AHE3_A/I 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 TPSMB18AHE3_A/I?
For technical support, including TPSMB18AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB18AHE3_A/I requirements.
6.How does Aetrix verify that TPSMB18AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All TPSMB18AHE3_A/I 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 TPSMB18AHE3_A/I meets industry standards.
7.What is the process for return or replacement of TPSMB18AHE3_A/I?
All TPSMB18AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB18AHE3_A/I, 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 TPSMB18AHE3_A/I part is unused and in its original packaging.
Return procedure for TPSMB18AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB18AHE3_A/I Tags
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