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Vishay General Semiconductor - Diodes Division TPSMB12AHE3/5BT
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- Part No.:
- TPSMB12AHE3/5BT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB12AHE3/5BT.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,774
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Product details
Overview
TPSMB12AHE3/5BT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching transients and lightning-induced surges on power/signal lines. It features 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), 16.7 V maximum clamping voltage (VC) at 35.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the TPSMB12AHE3/5BT datasheet, TPSMB12AHE3/5BT pinout, TPSMB12AHE3/5BT application, or TPSMB12AHE3/5BT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, TJ = 185 °C operation, low clamping ratio (VC/VBR ≈ 1.39), and MSL Level 1 reflow compatibility up to 260 °C.
Technical Context
This TVS diode operates as a voltage-clamping protection device in parallel with sensitive circuit nodes, triggering into avalanche conduction when transient voltage exceeds its breakdown threshold. Its passivated anisotropic rectifier structure ensures stable leakage and low incremental surge resistance under repetitive surge stress.
Designed for high-reliability environments, the TPSMB12AHE3/5BT supports junction temperatures up to +185 °C and meets JESD201 Class 2 whisker resistance. It is qualified to AEC-Q101 and RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.4 / 12.0 / 12.6 V at 1 mA - defines precise avalanche initiation point for predictable clamping onset |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 16.7 V at 35.9 A - clamped voltage during 600 W transient, limiting downstream stress |
| PPPM | 600 W (10/1000 µs) - surge energy handling capacity without failure under standard test waveform |
| TJ max. | +185 °C - enables use in under-hood automotive and high-ambient industrial environments |
| IR @ VWM | 2 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 0.220" x 0.130" footprint and MSL Level 1 rating |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with cathode band marking; terminals are matte tin-plated, compliant with J-STD-002 solderability and JESD22-B102 lead finish standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Stable VBR and low leakage across temperature and lifetime, critical for long-term reliability in automotive ECUs |
| AEC-Q101 qualification | Validated for automotive-grade stress testing including HTOL, TC, HAST, and ESD - required for engine control, ADAS, and body electronics |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture-related popcorn failure or delamination |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage overshoot during fast transients, improving margin for 12 V rail and logic-level interface protection |
| 75 A IFSM (8.3 ms half-sine) | Withstands high-energy inrush or fault currents without bond-wire fusing, supporting robust power rail protection |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied microcontrollers and CAN transceivers from load-dump and jump-start transients in vehicle body control modules. IC Role / Device Role / Timing Role: Parallel-connected clamping device that diverts surge current away from downstream ICs during ISO 16750-2 pulses. Use Value: Limits voltage to ≤16.7 V during 35.9 A transients, preserving logic-level integrity and preventing latch-up in 3.3 V/5 V peripherals. | Use Scenario: Shielding analog output lines of pressure/temperature sensors in PLC I/O modules from ESD and inductive kickback in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF typical) shunt protector placed directly at connector entry to minimize stub length and preserve signal fidelity. Use Value: Clamps ±8 kV contact ESD (IEC 61000-4-2) and 100 V/µs transients to safe levels while adding <0.5 pF parasitic capacitance to signal path. |
| Consumer Power Adapter Input Protection | Telecom DC Power Feed Protection |
Use Scenario: Safeguarding primary-side controllers and bridge rectifiers in universal-input AC/DC adapters against line surges and lightning-induced spikes. IC Role / Device Role / Timing Role: Front-end transient suppressor mounted across bulk capacitor input, triggered before upstream fuse opens. Use Value: Absorbs 600 W (10/1000 µs) surges without degradation, enabling compact adapter designs meeting UL 1449 Type 4 requirements. | Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras, wireless APs) from induced surges on 48 V DC feed lines in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Unidirectional TVS placed between DC+ and ground to clamp positive-going surges while allowing normal 48 V operation. Use Value: Withstands repeated 10/1000 µs surges up to 35.9 A with <1% duty cycle, ensuring uptime in harsh outdoor deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Same SMB package, identical VBR (11.4–12.6 V), but rated for 600 W with 10/1000 µs waveform and not AEC-Q101 qualified | Lacks automotive qualification; suitable for industrial/commercial only where AEC-Q101 is not mandated | Select SMBJ12A if cost sensitivity outweighs automotive compliance and thermal derating above 125 °C is not required |
| TPSMB12AHM3/5BT | Identical electrical specs and AEC-Q101 qualification; differs only in halogen-free molding compound (HM3 suffix vs. HE3) | Required for RoHS + halogen-free compliance mandates (e.g., EU WEEE, certain Tier 1 automotive specs) | Choose TPSMB12AHM3/5BT when halogen-free material content is contractually specified or environmental certification is mandatory |
Compared with SMBJ12A and TPSMB12AHM3/5BT, the TPSMB12AHE3/5BT provides AEC-Q101 qualification and RoHS compliance in a halogen-containing package - making it optimal for cost-sensitive automotive applications where halogen content is unrestricted but high-temperature reliability is essential.
Availability
TPSMB12AHE3/5BT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC feed surge suppression requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPSMB12AHE3/5BT 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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, thermal performance, and application-specific validation.
The TPSMB series is engineered for high-temperature, high-reliability transient suppression - targeting automotive, industrial, and telecom systems where sustained operation up to +185 °C and AEC-Q101 compliance are mandatory.
FAQ
What is the breakdown voltage tolerance of the TPSMB12AHE3/5BT?
The TPSMB12AHE3/5BT has a breakdown voltage (VBR) range of 11.4 V to 12.6 V at 1 mA test current, representing a ±5% tolerance around the nominal 12 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports reliable design margining in 12 V system protection circuits. The TPSMB12AHE3/5BT's VBR is measured after 300 µs square-wave pulse application per ANSI/IEEE C62.35 standards.
Is the TPSMB12AHE3/5BT suitable for automotive applications?
Yes, the TPSMB12AHE3/5BT is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood and chassis-mounted automotive applications such as body control modules, lighting drivers, and sensor interfaces. Its matte tin-plated leads meet JESD22-B102, and the device is RoHS-compliant. The TPSMB12AHE3/5BT is explicitly designated for automotive use via the HE3 suffix per Vishay's ordering nomenclature.
What is the maximum clamping voltage of the TPSMB12AHE3/5BT during a 600 W transient?
The TPSMB12AHE3/5BT exhibits a maximum clamping voltage (VC) of 16.7 V when subjected to its rated 35.9 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value represents the upper limit of voltage seen by protected circuitry during worst-case surge events. The TPSMB12AHE3/5BT achieves this with a clamping ratio of approximately 1.39 (VC/VBR), confirming effective transient suppression capability.
Does the TPSMB12AHE3/5BT have polarity markings, and how is it oriented on PCB?
Yes, the TPSMB12AHE3/5BT features a visible cathode band (dark stripe) on the SMB (DO-214AA) package body, identifying the cathode terminal. During PCB layout, the banded end must be routed toward the line being protected (e.g., 12 V rail), while the anode connects to ground or reference plane. This orientation ensures proper unidirectional clamping action - the TPSMB12AHE3/5BT conducts only when the protected line goes positive relative to ground.
What is the surge current rating of the TPSMB12AHE3/5BT for non-repetitive events?
The TPSMB12AHE3/5BT supports a non-repetitive peak forward surge current (IFSM) of 75 A for an 8.3 ms single half-sine waveform, per JEDEC standards. This rating applies to short-duration fault conditions like motor stall or hot-swap inrush. The TPSMB12AHE3/5BT maintains structural integrity under this stress when mounted on 0.2" × 0.2" copper pads, and its low incremental surge resistance helps dissipate energy without thermal runaway.
TPSMB12AHE3/5BT 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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 35.9A
- 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)
TPSMB12AHE3/5BT FAQ
1.How can I place an order for TPSMB12AHE3/5BT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB12AHE3/5BT 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 TPSMB12AHE3/5BT reliable?
The price and inventory of TPSMB12AHE3/5BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB12AHE3/5BT is usually 5 days.
3.What payment methods are accepted for TPSMB12AHE3/5BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB12AHE3/5BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB12AHE3/5BT?
TPSMB12AHE3/5BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB12AHE3/5BT 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 TPSMB12AHE3/5BT?
For technical support, including TPSMB12AHE3/5BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB12AHE3/5BT requirements.
6.How does Aetrix verify that TPSMB12AHE3/5BT is sourced from the original manufacturer or authorized distributors?
All TPSMB12AHE3/5BT 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 TPSMB12AHE3/5BT meets industry standards.
7.What is the process for return or replacement of TPSMB12AHE3/5BT?
All TPSMB12AHE3/5BT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB12AHE3/5BT, 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 TPSMB12AHE3/5BT part is unused and in its original packaging.
Return procedure for TPSMB12AHE3/5BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB12AHE3/5BT Tags
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