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Vishay General Semiconductor - Diodes Division TPSMA33AHE3_B/I
- Part No.:
- TPSMA33AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA33AHE3_B/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,091
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Product details
Overview
TPSMA33AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 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 - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the TPSMA33AHE3_B/I datasheet, TPSMA33AHE3_B/I pinout, TPSMA33AHE3_B/I application, or TPSMA33AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, clamping performance under 10/1000 µs surges, thermal derating above 25 °C, and compatibility with automated SMT assembly using J-STD-002-compliant matte tin terminations.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its junction design enables reliable operation at TJ = 185 °C and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
The device responds within picoseconds to transient overvoltages and clamps with minimal overshoot due to low dynamic impedance. It is rated for repetitive 10/1000 µs pulses at 0.01 % duty cycle and supports surge currents up to 8.8 A while maintaining VC ≤ 45.7 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 / 33.0 / 34.7 V at 1 mA - defines precise voltage threshold where avalanche conduction begins under controlled test conditions |
| VWM | 28.2 V - maximum continuous reverse working voltage before leakage exceeds 1 µA, ensuring no false triggering during normal operation |
| VC @ IPPM | 45.7 V at 8.8 A - clamping voltage during 10/1000 µs surge, directly limiting downstream IC stress to safe levels |
| PPPM | 400 W - peak pulse power handling capability, enabling robust protection against lightning-induced and inductive-switching transients |
| TJ max. | 185 °C - junction temperature rating supporting under-hood automotive and high-ambient industrial environments without derating loss |
| Polarity | Unidirectional - provides reverse-biased transient suppression only; requires correct orientation relative to DC bias rail |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement for thermal and mechanical reliability |
Pinout & Package
Package: SMA (DO-214AC), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point for unidirectional TVS | Connected to ground or lower-potential node; completes current path during reverse transient clamp |
| Cathode | High-side connection point for unidirectional TVS | Connected to protected line (e.g., 24 V supply or CAN-H); blocks forward current, conducts reverse surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for under-hood and ADAS sensor modules |
| Junction passivation | Optimized anisotropic rectifier process reduces leakage drift and improves long-term stability at elevated temperatures |
| MSL Level 1 | Rated for unlimited floor life and peak reflow of 260 °C - eliminates baking requirements and supports high-yield SMT manufacturing |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive microcontrollers |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulse 5a/b transients in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output line and chassis ground, clamping transients before they reach ADC input or op-amp buffer. Use Value: Maintains signal integrity by limiting voltage excursion to ≤45.7 V during 8.8 A surges, preventing latch-up or permanent damage to downstream signal conditioning ICs. | Use Scenario: Safeguarding digital input channels on programmable logic controllers exposed to relay coil flyback and field wiring ESD in factory automation systems. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting induced surges from 24 V DC inputs to common ground before reaching optocoupler or Schmitt trigger input stage. Use Value: Enables compliance with IEC 61000-4-2 (±8 kV contact) and IEC 61000-4-4 (±2 kV fast transient burst) without additional filtering components. |
| Telecom Power Line Protection | Consumer USB Port Surge Suppression |
Use Scenario: Clamping voltage spikes on -48 V telecom power distribution rails caused by hot-swap events or lightning-induced coupling in central office equipment. IC Role / Device Role / Timing Role: Unidirectional TVS connected between -48 V rail and return, activated only during negative-going overvoltage events. Use Value: Withstands repetitive 400 W surges and maintains stable VBR across -65 °C to +185 °C, ensuring uptime in uncontrolled environmental enclosures. | Use Scenario: Adding secondary-level surge immunity to USB 2.0 data lines (D+/D−) in set-top boxes and smart displays subjected to user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance TVS placed inline with differential pair, leveraging fast response to divert ESD energy before it reaches USB transceiver PHY. Use Value: Achieves <10 pF junction capacitance (per curve Fig. 4) at VR = 0 V, preserving signal integrity up to 480 Mbps without eye diagram degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A | Same SMA package, identical VBR range (31.4–34.7 V), but rated for 400 W with 10/1000 µs waveform and not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial/industrial use only | Select SMAJ33A when AEC-Q101 is not required and cost sensitivity outweighs qualification needs |
| SMCJ33A | Higher power rating (1500 W), larger SMC (DO-214AB) package, same VBR and unidirectional polarity | Requires PCB redesign due to larger footprint and higher thermal mass; better suited for primary-level board-edge protection | Choose SMCJ33A when system-level surge requirements exceed 400 W or when higher IPPM (24.7 A) is needed for upstream protection stages |
Compared with SMAJ33A and SMCJ33A, the TPSMA33AHE3_B/I delivers automotive-grade reliability in the smallest standard surface-mount TVS outline, making it optimal for space-constrained, high-temperature sensor nodes where qualification and footprint are critical - not just power or voltage matching.
Availability
TPSMA33AHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O interfaces, and telecom power distribution systems requiring stable component supply, AEC-Q101 compliance, and high-temperature operational continuity.
Supply support for TPSMA33AHE3_B/I 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 MOSFETs with emphasis on reliability, thermal performance, and automotive qualification.
The TPSMA series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor family, engineered specifically for high-temperature, high-reliability surge protection in automotive and industrial environments where sustained 185 °C operation and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage tolerance of the TPSMA33AHE3_B/I?
The TPSMA33AHE3_B/I has a specified breakdown voltage (VBR) range of 31.4 V to 34.7 V at 1 mA test current, representing ±5% tolerance around the nominal 33 V rating. This tight distribution ensures consistent clamping behavior across production lots and supports predictable circuit protection design without over-engineering margins.
Is the TPSMA33AHE3_B/I RoHS-compliant and halogen-free?
Yes, the TPSMA33AHE3_B/I is RoHS-compliant and halogen-free, as confirmed by its HE3 suffix designation per Vishay's ordering nomenclature. The "HE3" indicates compliance with both RoHS Directive 2011/65/EU and halogen-free standards (IEC 61249-2-21), verified through material declarations and third-party testing reports.
Does the TPSMA33AHE3_B/I support automated optical inspection (AOI) after reflow?
Yes, the TPSMA33AHE3_B/I supports AOI post-reflow due to its standardized SMA (DO-214AC) outline, consistent matte tin plating, and clearly marked cathode band. Its dimensional tolerances and surface finish meet IPC-A-610 Class 2 requirements, enabling reliable detection of placement accuracy, solder joint quality, and polarity orientation in high-volume SMT lines.
What is the maximum clamping voltage of the TPSMA33AHE3_B/I under a 10/1000 µs surge?
The maximum clamping voltage (VC) of the TPSMA33AHE3_B/I is 45.7 V at 8.8 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured per JEDEC standards and represents the worst-case voltage seen by protected circuitry during full-rated surge events, defining the absolute upper limit of transient exposure.
Can the TPSMA33AHE3_B/I be used in bidirectional configurations?
No, the TPSMA33AHE3_B/I is unidirectional only, as explicitly stated in the Vishay datasheet. It conducts only in reverse bias during overvoltage events and blocks forward current. For bidirectional protection, two devices must be connected in series opposition or a dedicated bidirectional TVS (e.g., TPSMA33CA) must be selected - the TPSMA33AHE3_B/I cannot be repurposed.
TPSMA33AHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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_B/I FAQ
1.How can I place an order for TPSMA33AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA33AHE3_B/I 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_B/I reliable?
The price and inventory of TPSMA33AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA33AHE3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA33AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA33AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA33AHE3_B/I?
TPSMA33AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA33AHE3_B/I 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_B/I?
For technical support, including TPSMA33AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA33AHE3_B/I requirements.
6.How does Aetrix verify that TPSMA33AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA33AHE3_B/I 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_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA33AHE3_B/I?
All TPSMA33AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA33AHE3_B/I, 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_B/I part is unused and in its original packaging.
Return procedure for TPSMA33AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA33AHE3_B/I Tags
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