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Vishay General Semiconductor - Diodes Division TPSMB27A-1BHE3/5BT
- Part No.:
- TPSMB27A-1BHE3/5BT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB27A-1BHE3/5BT.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,622
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Product details
Overview
TPSMB27A-1BHE3/5BT 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 27 V nominal breakdown voltage (VBR), 23.1 V maximum stand-off voltage (VWM), 37.5 V clamping voltage at 16 A peak pulse current, 600 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - suitable for automotive power rail protection in engine control units and body electronics.
For engineers reviewing the TPSMB27A-1BHE3/5BT datasheet, TPSMB27A-1BHE3/5BT pinout, TPSMB27A-1BHE3/5BT application, or TPSMB27A-1BHE3/5BT equivalent, this page delivers verified electrical parameters, SMB (DO-214AA) package dimensions, cathode/anode terminal mapping, AEC-Q101 qualification status, and real-world use cases in automotive and industrial overvoltage protection circuits.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional polarity enables precise clamping on positive-going transients without reverse conduction during normal operation.
The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility and is AEC-Q101 qualified (HE3 suffix). Its 185 °C maximum junction temperature supports under-hood automotive deployment where thermal derating of surge capability must be calculated using αT = 0.087 %/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 25.7 / 27.0 / 28.4 V - ensures reliable turn-on before downstream IC damage at rated surge conditions |
| VWM | 23.1 V - maximum continuous working voltage without significant leakage (<1 µA) |
| VC @ IPPM | 37.5 V - clamping voltage at 16 A peak pulse current defines worst-case overvoltage seen by protected circuit |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform supports IEC 61000-4-5 Level 4 compliance |
| IFSM | 75 A - 8.3 ms half-sine surge rating validates robustness against motor commutation spikes |
| TJ max. | +185 °C - enables placement near heat sources in automotive ECUs without derating penalty |
| αT | 0.087 %/°C - temperature coefficient used to calculate VBR shift across operating range |
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).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; conducts when transient exceeds VBR, shunting current to ground |
| Anode | Cathode of internal PN junction | Typically tied to system ground or low-impedance return path to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process reduces leakage drift and improves long-term reliability at 150 °C |
| AEC-Q101 qualification | Validated for automotive-grade stress testing including HTOL, TC, and ESD per JESD47 |
| MSL Level 1 | Zero floor life limitation; safe for standard SMT reflow up to 260 °C peak |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR = 10.5 V) versus competing SMB TVS devices |
| Unidirectional polarity only | Prevents false triggering on negative transients; simplifies layout vs. bidirectional alternatives |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Suppressing load-dump transients (ISO 7637-2 Pulse 5a) on 24 V battery-fed ECUs in commercial vehicles. IC Role / Device Role / Timing Role: Primary clamping element placed between battery rail and DC-DC input, activated within <1 ns of overvoltage onset. Use Value: Limits peak voltage to ≤37.5 V, protecting 40 V-rated buck controllers and CAN transceivers without derating. |
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) from ESD and cable discharge events in factory automation sensors. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) TVS placed at connector interface, grounded to chassis to divert fast transients. Use Value: Maintains signal integrity with <1 µA leakage at 23.1 V, avoiding offset errors in precision current sourcing circuits. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Surge Suppression |
Use Scenario: Secondary-side overvoltage clamp in universal-input AC/DC adapters subjected to lightning-induced surges on mains-connected outputs. IC Role / Device Role / Timing Role: Standoff-rated TVS on +12 V or +19 V output rail, triggered only during fault conditions above VWM. Use Value: Withstands 600 W pulses without degradation, enabling single-stage protection without series impedance. |
Use Scenario: DC power feed line protection (−48 V telecom standard) against induced surges from nearby lightning strikes on outdoor plant wiring. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to −48 V rail, conducting only on positive excursions exceeding 23.1 V above rail. Use Value: 185 °C rating allows mounting on high-temperature telecom rectifier boards without thermal derating loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A | Same SMB package, identical VBR/VC specs, but not AEC-Q101 qualified; MSL Level 1 confirmed | Lacks automotive qualification; suitable for industrial/commercial designs without AEC requirements | Select SMBJ27A if AEC-Q101 is not mandated and cost sensitivity outweighs qualification assurance |
| TPSMB27CA | Bidirectional variant with symmetric ±27 V breakdown; same package, power rating, and temperature capability | Clamps both positive and negative transients - required for AC-coupled or floating signal lines | Choose TPSMB27CA only when bidirectional protection is needed; otherwise TPSMB27A-1BHE3/5BT offers lower leakage and tighter VWM |
Compared with SMBJ27A, TPSMB27A-1BHE3/5BT adds AEC-Q101 validation for automotive use without sacrificing clamping performance; compared with TPSMB27CA, it provides lower leakage and higher VWM margin for unidirectional DC rails, reducing false triggering risk.
Availability
TPSMB27A-1BHE3/5BT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power feeders requiring stable component supply with guaranteed AEC-Q101 compliance and high-temperature operational continuity.
Supply support for TPSMB27A-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, MOSFETs, and passive components for demanding industrial and automotive environments.
The TPSMB27A-1BHE3/5BT belongs to Vishay's PAR® (Protected Anisotropic Rectifier) TVS family, engineered specifically for high-temperature, high-surge automotive power rail protection with validated AEC-Q101 performance.
FAQ
What is the AEC-Q101 qualification status of TPSMB27A-1BHE3/5BT?
TPSMB27A-1BHE3/5BT is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's official datasheet (Doc. #88406, Rev. 23-Jan-2024). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, making TPSMB27A-1BHE3/5BT suitable for automotive under-hood applications where reliability is critical.
Does TPSMB27A-1BHE3/5BT support lead-free reflow soldering?
Yes, TPSMB27A-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 comply with J-STD-002 and JESD 22-B102, and it passes JESD 201 Class 2 whisker testing - all verified in the official Vishay datasheet for TPSMB27A-1BHE3/5BT.
What is the clamping voltage of TPSMB27A-1BHE3/5BT at its rated peak pulse current?
The clamping voltage (VC) of TPSMB27A-1BHE3/5BT is 37.5 V at 16 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the maximum voltage imposed on the protected circuit during a standardized surge event - a key parameter for validating downstream IC survivability in TPSMB27A-1BHE3/5BT designs.
How does the temperature coefficient affect TPSMB27A-1BHE3/5BT's breakdown voltage?
The TPSMB27A-1BHE3/5BT has a VBR temperature coefficient (αT) of 0.087 %/°C. Using the formula VBR at TJ = VBR at 25 °C × (1 + αT × (TJ − 25)), its breakdown voltage increases by ~2.3% at 125 °C and ~13.5% at 185 °C - a critical consideration for thermal design margins in TPSMB27A-1BHE3/5BT automotive deployments.
Is TPSMB27A-1BHE3/5BT unidirectional or bidirectional?
TPSMB27A-1BHE3/5BT is unidirectional only, as explicitly stated in the Vishay datasheet. Its cathode band marks the terminal that connects to the line being protected; it conducts only during positive transients exceeding VBR. This polarity prevents reverse conduction during normal operation and yields lower leakage than bidirectional variants like TPSMB27CA - a defining feature of the TPSMB27A-1BHE3/5BT.
TPSMB27A-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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 16A
- 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)
TPSMB27A-1BHE3/5BT FAQ
1.How can I place an order for TPSMB27A-1BHE3/5BT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB27A-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 TPSMB27A-1BHE3/5BT reliable?
The price and inventory of TPSMB27A-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 TPSMB27A-1BHE3/5BT is usually 5 days.
3.What payment methods are accepted for TPSMB27A-1BHE3/5BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB27A-1BHE3/5BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB27A-1BHE3/5BT?
TPSMB27A-1BHE3/5BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB27A-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 TPSMB27A-1BHE3/5BT?
For technical support, including TPSMB27A-1BHE3/5BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB27A-1BHE3/5BT requirements.
6.How does Aetrix verify that TPSMB27A-1BHE3/5BT is sourced from the original manufacturer or authorized distributors?
All TPSMB27A-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 TPSMB27A-1BHE3/5BT meets industry standards.
7.What is the process for return or replacement of TPSMB27A-1BHE3/5BT?
All TPSMB27A-1BHE3/5BT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB27A-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 TPSMB27A-1BHE3/5BT part is unused and in its original packaging.
Return procedure for TPSMB27A-1BHE3/5BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB27A-1BHE3/5BT Tags
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