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Vishay General Semiconductor - Diodes Division TPSMA33AHE3_A/H
- Part No.:
- TPSMA33AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA33AHE3_A/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPSMA33AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive switching transients and lightning-induced surges on power and signal lines. It features a 33 V breakdown voltage (VBR = 31.4–34.7 V at IT = 1.0 mA), 400 W peak pulse power (10/1000 µs), 45.7 V maximum clamping voltage at 8.8 A, 1.0 W steady-state power dissipation, and operates up to TJ = +185 °C - deployed in automotive sensor protection and industrial power supply input stages.
For engineers reviewing the TPSMA33AHE3_A/H datasheet, TPSMA33AHE3_A/H pinout, TPSMA33AHE3_A/H application, or TPSMA33AHE3_A/H equivalent, key selection criteria include unidirectional polarity, SMA (DO-214AC) package compatibility, AEC-Q101 qualification status, clamping performance under 10/1000 µs surge, and thermal derating above 25 °C ambient.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with junction passivation optimized for high-reliability operation. Its unidirectional structure provides low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of fast-rising transients while maintaining stable clamping across temperature (αT = 0.089 %/°C).
The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine), meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and is qualified to AEC-Q101 - confirming suitability for automotive-grade PCB-level overvoltage protection where long-term thermal stability and solderability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 / 33.0 / 34.7 V at 1.0 mA - defines precise voltage threshold at which clamping initiates under controlled test conditions |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA at 25 °C |
| VC @ IPPM | 45.7 V at 8.8 A - clamped voltage during 400 W 10/1000 µs surge, directly limiting downstream IC stress |
| PPPM | 400 W - peak pulse power handling capability under standard waveform, defining transient energy absorption capacity |
| TJ max. | +185 °C - enables reliable operation in under-hood automotive or high-temperature industrial environments without derating |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct cathode orientation in circuit |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint and matte tin-plated leads |
Pinout & Package
TPSMA33AHE3_A/H is housed in an SMA (DO-214AC) package: a molded plastic case with two coplanar terminals, cathode identified by a color band. The package meets UL 94 V-0 flammability rating and supports reflow soldering per J-STD-020 MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VLINE exceeds VBR |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes conduction path during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivated anisotropic rectifier technology | Enables stable VBR and low leakage (<1.0 μA at VWM) across -65 °C to +185 °C operating range |
| AEC-Q101 qualification (HE3 suffix) | Validates reliability for automotive applications including engine control units and ADAS sensor interfaces |
| 400 W peak pulse power (10/1000 µs) | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surge events |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing without baking, reducing manufacturing overhead |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on downstream MOSFETs or microcontrollers during transient events |
Applications
| Automotive Sensor Protection | Industrial Power Supply Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and chassis ground, responding within <1 ns to limit voltage excursion. Use Value: Maintains signal integrity under ISO 16750-2 load dump (12 V systems) and prevents latch-up in 3.3 V/5 V interface ICs via 45.7 V clamping ceiling. | Use Scenario: Safeguarding AC-DC and DC-DC converter inputs against lightning-induced surges and inductive kickback from relays or solenoids. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V or 48 V rail, positioned upstream of input filter capacitors and bridge rectifiers. Use Value: Absorbs 400 W transient energy without degradation, preserving upstream fuse coordination and preventing MOSFET avalanche failure. |
| Telecom Line Interface | Consumer Device USB/Power Port |
Use Scenario: Shielding Ethernet PHYs, PoE injectors, and DSL line drivers from induced surges on twisted-pair cabling exposed to outdoor environments. IC Role / Device Role / Timing Role: Secondary-level TVS on differential pairs or bias rails, coordinated with gas discharge tubes (GDTs) for multi-stage protection. Use Value: Fast response ensures clamping occurs before GDT fires, reducing let-through voltage and protecting sensitive PHY silicon. | Use Scenario: Adding surge immunity to USB-C PD ports, wall adapters, and battery charging circuits in smartphones and tablets. IC Role / Device Role / Timing Role: Final-stage clamp on VBUS line, placed after common-mode chokes and before USB controller or charge management IC. Use Value: Withstands repetitive 10/1000 µs surges at 0.01% duty cycle, meeting IEC 61000-4-5 Level 3 requirements 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 |
|---|---|---|---|
| SMBJ33A (Bourns) | Same VBR range (31.4–34.7 V), but SMB package (DO-214AA); 600 W PPPM; higher IPPM (13.3 A) | Larger footprint (0.236" × 0.157") and 0.020" greater height; less suitable for ultra-dense automotive layouts | Select SMBJ33A only if higher surge margin is required and board space permits larger package |
| SMCJ33A (Littelfuse) | Same VBR, but SMC package (DO-214AB); 1500 W PPPM; IPPM = 33.5 A; TJ max. = +175 °C | Substantially larger (0.276" × 0.197"); not AEC-Q101 qualified; intended for industrial mains-level protection | Choose SMCJ33A for high-energy AC line protection; avoid for space-constrained AEC-Q101 designs requiring TJ = +185 °C |
Compared with SMBJ33A and SMCJ33A, TPSMA33AHE3_A/H offers the smallest footprint among 33 V unidirectional TVS diodes with AEC-Q101 qualification and +185 °C junction rating - making it optimal for automotive sensor modules and compact industrial controllers where thermal headroom and layout density are critical.
Availability
TPSMA33AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power supply input stages, and telecom line interface applications requiring stable component supply, AEC-Q101 compliance, and high-temperature operational reliability.
Supply support for TPSMA33AHE3_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 reliability, thermal performance, and automotive qualification.
The TPSMA33AHE3_A/H belongs to Vishay's PAR® (Protected Anisotropic Rectifier) TVS family, engineered specifically for high-temperature, high-reliability transient suppression in automotive and industrial environments where sustained operation above 150 °C is required.
FAQ
What is the breakdown voltage tolerance for TPSMA33AHE3_A/H?
The TPSMA33AHE3_A/H has a specified breakdown voltage range of 31.4 V to 34.7 V at 1.0 mA test current, corresponding to ±5% tolerance around the nominal 33 V rating. This tolerance is confirmed in the Electrical Characteristics table of Vishay document 88405 and applies under standard test conditions at TA = 25 °C. The TPSMA33AHE3_A/H maintains this specification across its full operating temperature range due to its 0.089 %/°C temperature coefficient.
Is TPSMA33AHE3_A/H RoHS-compliant and halogen-free?
Yes, TPSMA33AHE3_A/H is RoHS-compliant and halogen-free. As stated in the Mechanical Data section of Vishay document 88405, the HE3 suffix denotes RoHS-compliance and AEC-Q101 qualification, while the HM3 suffix adds halogen-free status. Since TPSMA33AHE3_A/H carries the HE3 suffix, it meets RoHS Directive 2011/65/EU but does not carry the additional halogen-free certification - that designation applies only to HM3 variants.
What is the maximum clamping voltage of TPSMA33AHE3_A/H at its rated peak pulse current?
The maximum clamping voltage of TPSMA33AHE3_A/H is 45.7 V at 8.8 A peak pulse current (IPPM), measured using the standard 10/1000 µs double-exponential waveform. This value is specified in the Electrical Characteristics table of Vishay document 88405 and represents the worst-case voltage seen by downstream components during a full-rated surge event. The TPSMA33AHE3_A/H achieves this with a clamping ratio of approximately 1.39 relative to its nominal VBR.
Does TPSMA33AHE3_A/H require derating at elevated ambient temperatures?
Yes, TPSMA33AHE3_A/H requires thermal derating above TA = 25 °C. Its 1.0 W steady-state power dissipation (PD) decreases linearly per Figure 2 in Vishay document 88405, reaching zero at TA = +150 °C. For example, at TA = 100 °C, the allowable PD drops to ~0.5 W. The TPSMA33AHE3_A/H retains full 400 W pulse capability up to TJ = +185 °C, but PCB copper pad area and layout must support adequate heat spreading.
How is polarity identified on the TPSMA33AHE3_A/H package?
Polarity on the TPSMA33AHE3_A/H is identified by a visible color band on the cathode end of the SMA (DO-214AC) package. As shown in the Package Outline Dimensions diagram in Vishay document 88405, the banded terminal is the cathode and must be connected toward the protected line (e.g., VIN or signal), while the unbanded terminal (anode) connects to ground. This unidirectional configuration ensures proper clamping action only for positive transients relative to ground.
TPSMA33AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 8.8A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
TPSMA33AHE3_A/H FAQ
1.How can I place an order for TPSMA33AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA33AHE3_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 TPSMA33AHE3_A/H reliable?
The price and inventory of TPSMA33AHE3_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 TPSMA33AHE3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMA33AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA33AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA33AHE3_A/H?
TPSMA33AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA33AHE3_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 TPSMA33AHE3_A/H?
For technical support, including TPSMA33AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA33AHE3_A/H requirements.
6.How does Aetrix verify that TPSMA33AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMA33AHE3_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 TPSMA33AHE3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMA33AHE3_A/H?
All TPSMA33AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA33AHE3_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 TPSMA33AHE3_A/H part is unused and in its original packaging.
Return procedure for TPSMA33AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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