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Vishay General Semiconductor - Diodes Division TPSMB18A-1BHE3/5BT
- Part No.:
- TPSMB18A-1BHE3/5BT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB18A-1BHE3/5BT.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,229
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Product details
Overview
TPSMB18A-1BHE3/5BT 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 maximum stand-off voltage (VWM), 25.2 V clamping voltage at 23.8 A peak pulse current, 600 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - deployed in automotive power supply protection and industrial sensor interface circuits.
For engineers reviewing the TPSMB18A-1BHE3/5BT datasheet, TPSMB18A-1BHE3/5BT pinout, TPSMB18A-1BHE3/5BT application, or TPSMB18A-1BHE3/5BT equivalent, key selection criteria include unidirectional polarity, SMB (DO-214AA) package compatibility, AEC-Q101 qualification status, TJ = 185 °C thermal rating, and clamping performance under repetitive 10/1000 µs surge conditions.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable breakdown behavior across temperature and high reliability under repeated surge stress. Its 185 °C maximum junction temperature and MSL Level 1 rating support reflow soldering at 260 °C peak and operation in under-hood automotive environments.
The device exhibits low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of fast-rising transients before downstream ICs or MOSFETs are damaged. Clamping occurs at 25.2 V when subjected to its rated 23.8 A peak pulse current (10/1000 µs waveform), with <1 µA reverse leakage at 15.3 V stand-off voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - ensures reliable conduction onset above normal operating voltage while avoiding false triggering |
| VWM | 15.3 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below VBR |
| VC @ IPPM | 25.2 V - clamping voltage during 23.8 A surge; defines worst-case overvoltage seen by protected circuitry |
| PPPM | 600 W - peak pulse power handling capability per 10/1000 µs waveform; determines survivability against standard surge events |
| IFSM | 75 A - 8.3 ms half-sine surge current rating; supports robustness against inrush or fault currents |
| TJ max. | +185 °C - enables use in high-temperature locations such as engine control units and industrial motor drives |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct cathode orientation in PCB layout |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink terminal | Connected to protected line; conducts transient energy to ground when voltage exceeds VBR |
| Anode | Reference/return terminal | Typically tied to system ground; completes clamping path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Stable VBR drift <±5 % over lifetime and temperature; critical for long-term reliability in automotive ECUs |
| AEC-Q101 qualification | Validated for automotive-grade stress testing including HTGB, HTRB, and temperature cycling - required for ASIL-B systems |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without popcorn cracking or delamination |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients; improves clamping precision versus legacy TVS devices |
| 10/1000 µs waveform rating | Complies with ISO 7637-2 Pulse 1 & 2 and IEC 61000-4-5 surge immunity test standards |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppresses load dump and alternator ripple transients on 12 V battery-fed microcontroller power supplies in body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between VBAT and GND, upstream of LDO regulators. Use Value: Limits voltage to ≤25.2 V during 23.8 A surges, preventing damage to 3.3 V/5 V logic and analog front-ends. |
Use Scenario: Shields 4–20 mA current loop transmitters and RS-485 nodes from ESD and field wiring surges in factory automation PLCs. IC Role / Device Role / Timing Role: Standoff protector on signal line inputs, with cathode tied to signal and anode to local ground. Use Value: Clamps transients within nanoseconds while maintaining <1 µA leakage at 15.3 V, preserving loop accuracy and noise immunity. |
| Consumer Power Adapter Input Protection | Telecom DC Power Feed Protection |
Use Scenario: Guards AC/DC adapter primary-side input rectifiers and controllers against lightning-induced surges entering via mains lines. IC Role / Device Role / Timing Role: Secondary-side TVS on DC output rail, positioned after bulk capacitor and before DC-DC converter input. Use Value: Absorbs 600 W pulses without degradation, ensuring sustained protection across >100,000 surge events per MIL-STD-883H Class H. |
Use Scenario: Protects PoE (Power over Ethernet) midspan injectors and PSE controllers from induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Bidirectional-capable system uses two TPSMB18A-1BHE3/5BT in back-to-back configuration for full-line clamping. Use Value: Delivers matched 18 V VBR and 25.2 V VC in both polarities, enabling symmetrical clamping without specialized bidirectional parts. |
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/VC specs, but not AEC-Q101 qualified; lower TJ max. (150 °C) | Lacks automotive qualification; suitable for industrial/commercial designs without AEC compliance requirements | Select SMBJ18A only if AEC-Q101 is not mandated and cost sensitivity outweighs extended temperature margin. |
| TPSMB18CA | Bi-directional variant; same VBR, but symmetric clamping for AC-coupled or floating lines | Required where negative-going transients must also be suppressed (e.g., differential bus lines, transformer-coupled interfaces) | Choose TPSMB18CA only when bidirectional protection is explicitly needed; unidirectional TPSMB18A-1BHE3/5BT offers lower capacitance and tighter VBR tolerance. |
Compared with SMBJ18A and TPSMB18CA, the TPSMB18A-1BHE3/5BT uniquely combines AEC-Q101 qualification, +185 °C operation, and unidirectional optimization - making it the preferred choice for automotive power domain protection where thermal margin and qualification rigor are non-negotiable.
Availability
TPSMB18A-1BHE3/5BT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, and telecom DC power feed protection requiring stable component supply and long-term lifecycle assurance.
Supply support for TPSMB18A-1BHE3/5BT 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, rectifiers, and protection devices for demanding industrial and automotive applications.
The TPSMB series was engineered specifically for high-temperature, high-surge environments - targeting under-hood automotive electronics, industrial motor controls, and infrastructure power systems where failure is not an option.
FAQ
What is the AEC-Q101 qualification status of TPSMB18A-1BHE3/5BT?
The TPSMB18A-1BHE3/5BT carries full AEC-Q101 qualification, verified per stress test conditions including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. This certification confirms suitability for automotive applications up to ASIL-B safety integrity levels and is documented in Vishay's official qualification report for base P/NHE3 variants.
Does TPSMB18A-1BHE3/5BT support lead-free reflow soldering?
Yes, TPSMB18A-1BHE3/5BT meets J-STD-020 MSL Level 1 and is rated for lead-free reflow with a maximum peak temperature of 260 °C. Its matte tin-plated terminals are solderable per JESD 22-B102 and have passed whisker testing per JESD 201 Class 2, ensuring robust interconnect reliability in automated assembly.
What is the maximum clamping voltage of TPSMB18A-1BHE3/5BT under surge conditions?
The TPSMB18A-1BHE3/5BT clamps to a maximum of 25.2 V when subjected to its rated 23.8 A peak pulse current (10/1000 µs waveform). This value is guaranteed across the full operating temperature range and forms the upper voltage limit imposed on protected circuitry during transient events.
Can TPSMB18A-1BHE3/5BT be used in bidirectional protection configurations?
TPSMB18A-1BHE3/5BT is unidirectional only. For bidirectional protection, two TPSMB18A-1BHE3/5BT devices may be connected in series opposition (anode-to-anode), achieving symmetrical clamping at ±25.2 V - though this increases board area and requires careful layout to avoid parasitic inductance effects.
How does the 185 °C junction temperature rating impact system design?
The +185 °C maximum junction temperature of TPSMB18A-1BHE3/5BT allows placement in high-heat zones such as near power MOSFETs or under-hood ECUs without derating. It enables smaller heatsinking, higher ambient operating margins, and longer service life in thermally constrained automotive and industrial enclosures compared to standard 150 °C TVS diodes.
TPSMB18A-1BHE3/5BT 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 (SMB)
TPSMB18A-1BHE3/5BT FAQ
1.How can I place an order for TPSMB18A-1BHE3/5BT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB18A-1BHE3/5BT 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 TPSMB18A-1BHE3/5BT reliable?
The price and inventory of TPSMB18A-1BHE3/5BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB18A-1BHE3/5BT is usually 5 days.
3.What payment methods are accepted for TPSMB18A-1BHE3/5BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB18A-1BHE3/5BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB18A-1BHE3/5BT?
TPSMB18A-1BHE3/5BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB18A-1BHE3/5BT 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 TPSMB18A-1BHE3/5BT?
For technical support, including TPSMB18A-1BHE3/5BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB18A-1BHE3/5BT requirements.
6.How does Aetrix verify that TPSMB18A-1BHE3/5BT is sourced from the original manufacturer or authorized distributors?
All TPSMB18A-1BHE3/5BT 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 TPSMB18A-1BHE3/5BT meets industry standards.
7.What is the process for return or replacement of TPSMB18A-1BHE3/5BT?
All TPSMB18A-1BHE3/5BT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB18A-1BHE3/5BT, 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 TPSMB18A-1BHE3/5BT part is unused and in its original packaging.
Return procedure for TPSMB18A-1BHE3/5BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB18A-1BHE3/5BT 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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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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