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Vishay General Semiconductor - Diodes Division TPSMB18A-1BHE3_A/I
- Part No.:
- TPSMB18A-1BHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB18A-1BHE3_A/I.pdf
- Description:
- TVS DIODE 600W SMB DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,092
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Product details
Overview
TPSMB18A-1BHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) 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) at IPPM, operating up to +185 °C junction temperature.
For engineers reviewing the TPSMB18A-1BHE3_A/I datasheet, TPSMB18A-1BHE3_A/I pinout, TPSMB18A-1BHE3_A/I application, or TPSMB18A-1BHE3_A/I equivalent, this device is selected for high-reliability automotive and industrial DC power line protection where AEC-Q101 qualification, MSL Level 1 solderability, and stable clamping under thermal stress are critical design requirements.
Technical Context
The TPSMB18A-1BHE3_A/I employs passivated anisotropic rectifier technology optimized for low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of sub-microsecond transients. Its unidirectional polarity and SMB (DO-214AA) package support integration into compact DC input stages without reverse-bias leakage concerns.
Rated for 75 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and 3.5 V max forward voltage at 50 A, it maintains robust conduction capability during sustained overvoltage events while delivering precise clamping performance across -65 °C to +185 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - Ensures reliable turn-on above system nominal voltage with margin against tolerance drift. |
| VWM | 15.3 V - Blocks normal operating voltage while allowing minimal leakage (<1 μA) at ambient and elevated temperatures. |
| VC @ IPPM | 25.2 V - Limits downstream IC/MOSFET stress during 600 W transient events without exceeding safe voltage thresholds. |
| IPPM | 23.8 A - Sustains high-energy surges typical of automotive load-dump or industrial relay coil flyback. |
| TJ max | +185 °C - Enables deployment in under-hood automotive modules and high-temperature industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Standardized surface-mount footprint compatible with automated assembly and IPC-7351B land patterns. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronic components including temperature cycling and HTRB. |
Pinout & Package
TPSMB18A-1BHE3_A/I uses the SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, cathode indicated by a color band, and mechanical dimensions conforming to JEDEC DO-214AA standard (length: 4.57 mm, width: 3.94 mm, height: 2.20 mm). Mounting requires 5.0 mm × 5.0 mm copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or transient clamping | Connected to protected circuit ground or low-side return path; defines unidirectional clamping direction. |
| Cathode | Current exit point during clamping; marked by color band | Connected to protected line (e.g., 12 V rail); establishes polarity-sensitive voltage clamp between cathode and anode. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients common in automotive 12 V systems and industrial motor drives without degradation. |
| 185 °C junction temperature rating | Supports operation in engine control units, power converters, and other thermally demanding environments. |
| MSL Level 1 (260 °C reflow) | Eliminates moisture sensitivity concerns and enables single-pass lead-free reflow without baking. |
| AEC-Q101 qualification (HE3 suffix) | Validates reliability for automotive applications including temperature cycling, HTRB, and ESD testing. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to downstream silicon, improving system-level surge immunity margin. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V supply inputs in body control modules (BCM), infotainment head units, and ADAS camera ECUs from ISO 7637-2 pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and local regulator input to clamp negative-going spikes and positive load-dump surges. Use Value: Maintains VC ≤ 25.2 V during 600 W events, preventing damage to LDOs, microcontrollers, and CAN transceivers downstream. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature, position) in factory automation PLC I/O modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector interface to shunt fast transients before they reach precision amplifier or ADC front-end. Use Value: Sub-1 ns response ensures clamping occurs before sensitive analog circuitry experiences destructive overvoltage. |
| Consumer Device DC Input Protection | Telecom Power Interface Surge Suppression |
Use Scenario: Safeguarding USB-C PD adapter secondary-side outputs and portable medical device chargers against accidental AC line coupling and hot-plug surges. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after isolation transformer or DC-DC converter output to limit transient overshoot during fault conditions. Use Value: 15.3 V VWM allows compatibility with 12–15 V regulated outputs while providing 25.2 V clamping ceiling for safety-critical loads. | Use Scenario: Front-end protection of PoE-powered equipment (e.g., IP cameras, wireless access points) against induced surges on Ethernet data pairs and auxiliary power lines. IC Role / Device Role / Timing Role: Unidirectional TVS integrated into RJ45 jack filter network to absorb common-mode energy without disrupting 100BASE-TX signaling integrity. Use Value: AEC-Q101 qualification and 185 °C rating ensure long-term reliability in outdoor telecom cabinets exposed to wide ambient swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Same SMB package, identical VBR (17.1–18.9 V), but not AEC-Q101 qualified; lower TJ max (150 °C) | Acceptable for commercial/industrial use only; unsuitable for automotive under-hood placement | Select when AEC-Q101 is not required and cost sensitivity outweighs extended temperature needs. |
| TPSMB18CA | Bi-directional variant; same VBR range but symmetrical clamping (±18 V); identical power rating and package | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN FD differential pairs) | Choose only if protecting balanced interfaces where reverse-polarity transients must also be suppressed. |
Compared with SMBJ18A and TPSMB18CA, the TPSMB18A-1BHE3_A/I uniquely combines AEC-Q101 qualification, +185 °C operation, and unidirectional clamping-making it the preferred choice for automotive power rail protection where thermal robustness and automotive compliance are mandatory.
Availability
TPSMB18A-1BHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, consumer DC power inputs, and telecom PoE equipment requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for TPSMB18A-1BHE3_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, MOSFETs, and protection devices with emphasis on high-reliability, high-temperature, and automotive-grade performance.
The TPSMB series was engineered specifically for surface-mount transient suppression in harsh-environment applications, prioritizing AEC-Q101 compliance, thermal stability up to +185 °C, and consistent clamping behavior across production lots.
FAQ
What is the clamping voltage of the TPSMB18A-1BHE3_A/I at its rated peak pulse current?
The TPSMB18A-1BHE3_A/I has a maximum clamping voltage (VC) of 25.2 V when subjected to its rated peak pulse current (IPPM) of 23.8 A under the standard 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88406 and reflects worst-case clamping performance at TA = 25 °C with specified PCB pad layout. The TPSMB18A-1BHE3_A/I maintains this clamping level across its full operating temperature range due to its low VBR temperature coefficient (0.080 %/°C).
Is the TPSMB18A-1BHE3_A/I suitable for automotive applications?
Yes, the TPSMB18A-1BHE3_A/I is AEC-Q101 qualified and carries the HE3 suffix indicating RoHS-compliance and automotive qualification. It supports junction temperatures up to +185 °C and meets MSL Level 1 reflow requirements-making it appropriate for under-hood and chassis-mounted automotive modules. The TPSMB18A-1BHE3_A/I is explicitly listed in Vishay's automotive ordering codes and validated for temperature cycling, HTRB, and ESD stress per AEC-Q101 Rev G.
What does the "-1B" in TPSMB18A-1BHE3_A/I signify?
The "-1B" suffix in TPSMB18A-1BHE3_A/I denotes the revision code per Vishay's internal part numbering convention, where "1B" indicates a specific manufacturing revision level tied to process or material updates documented in the master datasheet (88406, Rev 23-Jan-2024). This revision applies to all TPSMB18A variants with HE3 packaging and confirms alignment with the electrical and mechanical specifications published for that revision.
How does the TPSMB18A-1BHE3_A/I differ from the bi-directional TPSMB18CA?
The TPSMB18A-1BHE3_A/I is unidirectional, clamping only positive transients relative to ground, whereas the TPSMB18CA provides symmetrical clamping for both polarities. The TPSMB18A-1BHE3_A/I has a 15.3 V stand-off voltage (VWM) and 25.2 V clamping voltage, while the TPSMB18CA specifies ±15.3 V VWM and ±25.2 V VC. Both share identical SMB packaging, 600 W rating, and AEC-Q101 qualification-but the TPSMB18A-1BHE3_A/I is intended for DC power rail protection, not AC or differential signal lines.
What is the maximum reverse leakage current of the TPSMB18A-1BHE3_A/I at 15.3 V and 150 °C?
At VWM = 15.3 V and TJ = 150 °C, the TPSMB18A-1BHE3_A/I exhibits a maximum reverse leakage current (ID) of 5 µA, as specified in the Electrical Characteristics table of Vishay document 88406. This elevated-temperature leakage remains well below the 100 µA threshold typically used to define functional failure in TVS devices, confirming stable blocking behavior even under thermal stress. The TPSMB18A-1BHE3_A/I achieves this via optimized junction passivation and anisotropic rectifier design.
TPSMB18A-1BHE3_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 (SMBJ)
TPSMB18A-1BHE3_A/I FAQ
1.How can I place an order for TPSMB18A-1BHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB18A-1BHE3_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 TPSMB18A-1BHE3_A/I reliable?
The price and inventory of TPSMB18A-1BHE3_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 TPSMB18A-1BHE3_A/I is usually 5 days.
3.What payment methods are accepted for TPSMB18A-1BHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB18A-1BHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB18A-1BHE3_A/I?
TPSMB18A-1BHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB18A-1BHE3_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 TPSMB18A-1BHE3_A/I?
For technical support, including TPSMB18A-1BHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB18A-1BHE3_A/I requirements.
6.How does Aetrix verify that TPSMB18A-1BHE3_A/I is sourced from the original manufacturer or authorized distributors?
All TPSMB18A-1BHE3_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 TPSMB18A-1BHE3_A/I meets industry standards.
7.What is the process for return or replacement of TPSMB18A-1BHE3_A/I?
All TPSMB18A-1BHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB18A-1BHE3_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 TPSMB18A-1BHE3_A/I part is unused and in its original packaging.
Return procedure for TPSMB18A-1BHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB18A-1BHE3_A/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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