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Vishay General Semiconductor - Diodes Division TPSMB12AHE3_A/H
- Part No.:
- TPSMB12AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB12AHE3_A/H.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPSMB12AHE3_A/H 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 12.0 V nominal breakdown voltage (VBR), 10.2 V maximum stand-off voltage (VWM), 16.7 V clamping voltage at 35.9 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 TPSMB12AHE3_A/H datasheet, TPSMB12AHE3_A/H pinout, TPSMB12AHE3_A/H application, or TPSMB12AHE3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, SMB (DO-214AA) package compatibility with high-reliability PCB layouts, unidirectional polarity requirement, and thermal derating behavior above 25 °C ambient.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping performance under repetitive 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 ESD and fast-rising transients before downstream ICs or MOSFETs are damaged. Clamping occurs at 16.7 V when subjected to its rated 35.9 A peak pulse current (10/1000 µs waveform), with <2 µA reverse leakage at 10.2 V and 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 11.4 / 12.0 / 12.6 V - ensures reliable turn-on above system operating voltage while avoiding false triggering during normal transients |
| VWM | 10.2 V - maximum continuous reverse voltage the device blocks without significant leakage, matching 12 V rail applications |
| VC @ IPPM | 16.7 V - clamping voltage seen by protected circuit during 35.9 A surge, defining worst-case overvoltage exposure |
| PPPM | 600 W - peak pulse power handling capability per 10/1000 µs waveform, supporting robust surge immunity per ISO 7637-2 |
| TJ max. | +185 °C - enables use in high-temperature zones such as engine control units and power converters without thermal derating penalties |
| Polarity | Unidirectional - requires correct orientation relative to DC bias; cathode marked by band, suitable for positive-rail protection only |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 0.220" x 0.130" footprint, compatible with automated placement and reflow |
Pinout & Package
TPSMB12AHE3_A/H is housed in an SMB (DO-214AA) plastic package with two terminals: anode and cathode. The cathode is identified by a color band on the body. Mounting uses standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for optimal thermal dissipation and surge current handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode | Surge current sink node | Connected to protected line (e.g., 12 V rail); absorbs transient energy into ground path during overvoltage events |
| Anode | Reference/return node | Typically tied to system ground; completes conduction path when VAK exceeds VBR, enabling clamping action |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for ECUs and ADAS modules |
| Junction passivation | Reduces surface leakage and improves long-term stability under humidity and bias stress, critical for 15+ year automotive service life |
| MSL Level 1 (260 °C) | Enables single-pass lead-free reflow without popcorn cracking or delamination, eliminating pre-bake requirements in SMT lines |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage margin between trigger and clamp, allowing tighter design margins for sensitive 12 V logic interfaces |
| 75 A IFSM (8.3 ms) | Supports high-energy load dump events common in 12 V vehicle electrical systems without catastrophic failure |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: Protecting 12 V power inputs in engine control units against ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 5a (load dump). IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and local regulator input to clamp transients before LDO or DC-DC stage. Use Value: Limits voltage excursion to ≤16.7 V during 35.9 A surges, preventing regulator latch-up or MOSFET gate oxide damage in AEC-Q100-compliant designs. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation equipment from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry point to shunt fast transients before signal conditioning amplifier. Use Value: Responds in <1 ns to sub-100 ns ESD pulses, maintaining signal integrity while surviving >10,000 contact discharges per IEC 61000-4-2 Level 4. |
| Consumer USB Power Input Protection | Telecom DC Feeder Surge Suppression |
|
Use Scenario: Safeguarding USB-C PD input stages in portable medical devices from accidental 24 V adapter misconnection or hot-swap surges. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of buck converter to absorb overvoltage before primary FET gate driver. Use Value: Blocks 10.2 V continuously but clamps at 16.7 V within nanoseconds, preserving USB PD negotiation integrity while preventing IC destruction. |
Use Scenario: Front-end protection of -48 V DC telecom power feeds entering base station cabinets exposed to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: High-power unidirectional TVS installed between feed line and DC-DC isolation stage to divert multi-kA surge currents. Use Value: Handles 600 W peak pulse power with 185 °C junction rating, ensuring survivability during repeated lightning strikes without parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Same SMB package, 12 V VBR, but lower PPPM = 400 W and TJ max = +150 °C; no AEC-Q101 qualification | Limited to commercial/industrial use; unsuitable for automotive under-hood deployment due to thermal and qualification gaps | Select SMAJ12A only for cost-sensitive non-automotive designs where 400 W surge capacity suffices and 150 °C operation is adequate |
| SMCJ12A | Higher PPPM = 1500 W, same VBR and VC, but larger SMC (DO-214AB) package; AEC-Q101 available in HE3 variant | Requires PCB layout change; better suited for higher-energy threats like ISO 16750-2 load dump Category C | Choose SMCJ12A when system-level testing reveals 600 W insufficient; verify pad layout compatibility before migration from TPSMB12AHE3_A/H |
Compared with SMAJ12A and SMCJ12A, TPSMB12AHE3_A/H delivers optimal balance of AEC-Q101 compliance, 600 W surge capacity, and SMB footprint - making it the preferred choice for space-constrained automotive modules requiring validated reliability without board redesign.
Availability
TPSMB12AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power feeders requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPSMB12AHE3_A/H 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 high-reliability, high-temperature, and automotive-qualified components.
The TPSMB series was developed specifically for surface-mount transient suppression in harsh-environment applications - targeting AEC-Q101 compliance, 185 °C operation, and robust 10/1000 µs surge performance in compact SMB packages.
FAQ
What is the maximum clamping voltage of the TPSMB12AHE3_A/H under rated surge conditions?
The TPSMB12AHE3_A/H clamps to a maximum of 16.7 V when subjected to its rated peak pulse current of 35.9 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during transient events. The clamping voltage remains stable across temperature due to the device's low VBR temperature coefficient of 0.070 %/°C.
Is the TPSMB12AHE3_A/H suitable for bidirectional transient protection?
No, the TPSMB12AHE3_A/H is a unidirectional TVS diode and is not suitable for bidirectional protection. Its electrical characteristics - including breakdown voltage specification and polarity marking - are defined only for reverse-biased operation. For AC or dual-polarity signal lines, a dedicated bidirectional device such as the TPSMB12CAHE3_A/H must be used instead.
Does the TPSMB12AHE3_A/H meet automotive qualification standards?
Yes, the TPSMB12AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3". This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and surge endurance - validating its suitability for automotive powertrain, chassis, and body electronics applications.
What is the reverse leakage current of the TPSMB12AHE3_A/H at its maximum working voltage?
At the maximum stand-off voltage of 10.2 V and ambient temperature of 25 °C, the TPSMB12AHE3_A/H exhibits a maximum reverse leakage current of 2 µA. At elevated junction temperature (150 °C), leakage increases to 5 µA - a value still well within acceptable limits for low-power sensor and microcontroller I/O protection applications.
Can the TPSMB12AHE3_A/H be used in lead-free reflow processes?
Yes, the TPSMB12AHE3_A/H is rated MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C, fully compliant with lead-free soldering profiles. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability requirements, and the molding compound is UL 94 V-0 rated for flammability safety.
TPSMB12AHE3_A/H 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):
- 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 (SMB)
TPSMB12AHE3_A/H FAQ
1.How can I place an order for TPSMB12AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB12AHE3_A/H 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_A/H reliable?
The price and inventory of TPSMB12AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB12AHE3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMB12AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB12AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB12AHE3_A/H?
TPSMB12AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB12AHE3_A/H 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_A/H?
For technical support, including TPSMB12AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB12AHE3_A/H requirements.
6.How does Aetrix verify that TPSMB12AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMB12AHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of TPSMB12AHE3_A/H?
All TPSMB12AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB12AHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for TPSMB12AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB12AHE3_A/H Tags
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