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Vishay General Semiconductor - Diodes Division TPSMB18AHE3/5BT
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- Part No.:
- TPSMB18AHE3/5BT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB18AHE3/5BT.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,944
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Product details
Overview
TPSMB18AHE3/5BT from Vishay General Semiconductor is a unidirectional surface-mount 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 stand-off 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 power supply protection, industrial sensor interfaces, and DC-DC converter input stages.
For engineers reviewing the TPSMB18AHE3/5BT datasheet, TPSMB18AHE3/5BT pinout, TPSMB18AHE3/5BT application, or TPSMB18AHE3/5BT equivalent, this page delivers verified electrical parameters, SMB (DO-214AA) package mapping, cathode/anode terminal roles, AEC-Q101 qualification status, and direct alternatives with documented clamping and thermal differences.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging passivated anisotropic rectifier technology to achieve low incremental surge resistance and fast response time (<1 ns). Its 185 °C maximum junction temperature rating enables operation in under-hood automotive environments and high-temperature industrial enclosures without derating penalties up to 150 °C.
The device complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive transients), delivering stable clamping performance across -65 °C to +185 °C. Its 0.080 %/°C temperature coefficient of VBR ensures predictable voltage drift under thermal stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - defines precise clamping initiation threshold at 1 mA test current |
| VWM | 15.3 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 25.2 V - clamped voltage during 23.8 A 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 600 W - peak transient energy absorption capability per single pulse, duty cycle ≤ 0.01 % |
| TJ max. | +185 °C - enables placement near heat sources (e.g., power MOSFETs, DC-DC inductors) without failure |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 0.205" × 0.220" footprint and MSL Level 1 rating |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
SMB (DO-214AA) package with molded plastic body, matte tin-plated leads, and cathode band marking. Mounting requires 5.0 mm × 5.0 mm copper pads per terminal per JEDEC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line (e.g., 12 V rail); conducts surge current to ground when VIN > VC |
| Anode | Reference/ground return path | Connected to system ground plane; completes clamping loop with minimal inductance for sub-ns response |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables integration on positive-rail protection only, eliminating need for bidirectional layout complexity |
| 185 °C junction rating | Supports placement in high-temperature zones (e.g., engine control units, motor drivers) without thermal derating |
| 600 W 10/1000 µs pulse handling | Withstands ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 3a/b (line impedance transients) without degradation |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive production use including HTOL, TC, and ESD robustness per JESD47 |
| Low 25.2 V clamping at 23.8 A | Keeps protected 15 V-rated components (e.g., LDOs, microcontrollers) within safe operating area during surge events |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Clamping diode placed between battery input and primary DC-DC converter input stage. Use Value: Limits voltage to ≤25.2 V during 120 V/100 ms load dump, preventing overvoltage damage to downstream regulators and MCUs. |
Use Scenario: Protecting 4–20 mA current-loop sensor inputs from ESD and cable discharge events in factory automation PLCs. IC Role / Device Role / Timing Role: Unidirectional TVS connected across sensor input terminals to shunt transients to local ground. Use Value: Maintains signal integrity by clamping ±8 kV contact ESD (IEC 61000-4-2) to <30 V, preserving analog front-end accuracy. |
| DC-DC Converter Input Stage | Telecom Line Card Surge Suppression |
Use Scenario: Guarding buck converter inputs against inductive kickback from relay coils and solenoid drivers. IC Role / Device Role / Timing Role: TVS mounted directly at converter VIN pin, adjacent to bulk capacitor. Use Value: Absorbs 600 W pulses without thermal runaway, enabling reliable operation in 24 V industrial power supplies. |
Use Scenario: Safeguarding Ethernet PHY power pins and auxiliary bias rails in telecom base station line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on +3.3 V and +12 V rails feeding PHY ICs and clock buffers. Use Value: Clamps induced surges to 25.2 V while maintaining <1 μA leakage at 15.3 V, ensuring low-noise PHY operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Same VBR (18 V), but lower PPPM = 400 W; SMB package identical; no AEC-Q101 qualification | Acceptable for non-automotive industrial use where 600 W margin is not required | Select SMAJ18A only if cost sensitivity outweighs automotive qualification and 50 % higher surge margin |
| SMCJ18A | Higher PPPM = 1500 W; larger SMC (DO-214AB) package; same VBR/VC; AEC-Q101 available (HE3 variant) | Required where multi-pulse surge immunity or extended lifetime under repetitive transients is critical | Choose SMCJ18A when system-level testing reveals insufficient margin with 600 W rating, accepting larger PCB footprint |
Compared with TPSMB18AHE3/5BT, SMAJ18A trades surge robustness and automotive qualification for lower cost in benign environments, while SMCJ18A provides 2.5× pulse power headroom at the expense of board space - making TPSMB18AHE3/5BT the optimal balance of size, rating, and qualification for space-constrained automotive modules.
Availability
TPSMB18AHE3/5BT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning circuits, and telecom power rail protection requiring stable component supply with full traceability and AEC-Q101 compliance.
Supply support for TPSMB18AHE3/5BT 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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The TPSMB series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor family, engineered specifically for high-temperature, high-surge automotive and industrial applications demanding AEC-Q101 qualification and 185 °C operation.
FAQ
What is the exact breakdown voltage range for TPSMB18AHE3/5BT?
The TPSMB18AHE3/5BT 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. This tight 5.3 % tolerance ensures consistent clamping behavior across production lots and temperature extremes, critical for protecting 15 V-rated systems where overvoltage margin is constrained.
Is TPSMB18AHE3/5BT qualified for automotive applications?
Yes, TPSMB18AHE3/5BT is AEC-Q101 qualified - confirmed by its HE3 suffix and explicit listing in Vishay's AEC-Q101-compliant product documentation. It undergoes accelerated stress testing including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD47, making it suitable for under-hood ECUs, body control modules, and ADAS power supplies.
What does the "HE3" suffix indicate in TPSMB18AHE3/5BT?
The "HE3" suffix in TPSMB18AHE3/5BT denotes RoHS-compliant construction with matte tin-plated leads, JESD201 Class 2 whisker resistance, and full AEC-Q101 qualification. It also indicates packaging in 7" tape-and-reel (750 units per reel), distinguishing it from HM3 (halogen-free) and non-qualified base variants.
How does TPSMB18AHE3/5BT compare to bidirectional TVS diodes in circuit design?
TPSMB18AHE3/5BT is unidirectional and must be used only on positive-rail protection with anode grounded. Unlike bidirectional devices, it offers lower leakage (<1 μA at 15.3 V) and tighter VBR tolerance - ideal for DC power lines. Bidirectional alternatives require symmetric clamping and double the capacitance, making TPSMB18AHE3/5BT preferable for low-leakage, high-precision rail protection.
What is the maximum clamping voltage of TPSMB18AHE3/5BT under surge conditions?
The TPSMB18AHE3/5BT clamps to a maximum of 25.2 V when subjected to its rated 23.8 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C and remains stable across its -65 °C to +185 °C operating range due to low thermal resistance and optimized junction design.
TPSMB18AHE3/5BT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 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 (SMBJ)
TPSMB18AHE3/5BT FAQ
1.How can I place an order for TPSMB18AHE3/5BT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB18AHE3/5BT 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 TPSMB18AHE3/5BT reliable?
The price and inventory of TPSMB18AHE3/5BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB18AHE3/5BT is usually 5 days.
3.What payment methods are accepted for TPSMB18AHE3/5BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB18AHE3/5BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB18AHE3/5BT?
TPSMB18AHE3/5BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB18AHE3/5BT 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 TPSMB18AHE3/5BT?
For technical support, including TPSMB18AHE3/5BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB18AHE3/5BT requirements.
6.How does Aetrix verify that TPSMB18AHE3/5BT is sourced from the original manufacturer or authorized distributors?
All TPSMB18AHE3/5BT 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 TPSMB18AHE3/5BT meets industry standards.
7.What is the process for return or replacement of TPSMB18AHE3/5BT?
All TPSMB18AHE3/5BT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB18AHE3/5BT, 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 TPSMB18AHE3/5BT part is unused and in its original packaging.
Return procedure for TPSMB18AHE3/5BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB18AHE3/5BT Tags
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