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Vishay General Semiconductor - Diodes Division TPSMC33AHE3_B/I
- Part No.:
- TPSMC33AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
TPSMC33AHE3_B/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,079
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Product details
Overview
TPSMC33AHE3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power and signal lines. It features a 33 V nominal breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 28.2 V stand-off voltage (VWM), 45.7 V maximum clamping voltage at 32.8 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive power systems.
For engineers reviewing the TPSMC33AHE3_B/I datasheet, TPSMC33AHE3_B/I pinout, TPSMC33AHE3_B/I application, or TPSMC33AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 185 °C junction temperature rating, RoHS-compliant matte tin terminals, and MSL Level 1 moisture sensitivity.
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by reverse-biased avalanche breakdown. Its passivated anisotropic rectifier technology ensures stable clamping performance across temperature, with a typical VBR temperature coefficient of +0.089 %/°C and low incremental surge resistance enabling fast response to ESD and lightning-induced surges.
The device is rated for non-repetitive 8.3 ms half-sine surge currents up to 200 A and supports high-reliability mounting on 8.0 mm × 8.0 mm copper pads. Its cathode-band polarity marking and DO-214AB mechanical outline are standardized per JEDEC, ensuring compatibility with automated SMT assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 / 33.0 / 34.7 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 28.2 V - maximum continuous reverse working voltage before leakage exceeds 1 μA |
| VC @ IPPM | 45.7 V at 32.8 A - clamped voltage during 10/1000 μs transient, limiting stress on downstream components |
| PPPM | 1500 W - peak pulse power handling capability under standard IEC 61000-4-5 surge conditions |
| TJ max. | +185 °C - enables operation in under-hood automotive environments without derating |
| Polarity | Unidirectional - protects against positive transients only; requires correct orientation in circuit |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; safe for reflow up to 260 °C peak |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, 0.320" × 0.246" footprint (8.13 mm × 6.22 mm), cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lower-potential rail; completes conduction path during clamping |
| Cathode | High-side connection point | Connected to protected line; avalanche breakdown occurs between cathode and anode when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47 |
| Junction passivation | Optimized anisotropic rectifier structure minimizes parameter drift over lifetime and temperature |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surge (4 kV/2 Ω) without degradation when properly mounted |
| Fast response time | Sub-nanosecond turn-on enables protection of high-speed logic and analog front-ends |
| Low incremental surge resistance | Reduces clamping overshoot and improves energy absorption efficiency during repetitive transients |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power input and ground. Use Value: Limits voltage to ≤45.7 V during 10/1000 μs surges, preventing damage to 33 V-rated DC-DC controllers and microcontrollers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Standoff protector on 24 V signal lines exposed to field wiring inductive kickback. Use Value: Maintains <1 μA leakage at 28.2 V, preserving sensor accuracy while clamping spikes to 45.7 V. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Final-stage clamp after primary-side isolation and secondary-side rectification. Use Value: Withstands 1500 W pulses without thermal runaway, supporting EN 61000-4-5 compliance with minimal board area. | Use Scenario: Front-end protection for Ethernet PHY power rails in PoE-powered network switches. IC Role / Device Role / Timing Role: Transient suppressor on 48 V bias supply feeding gigabit Ethernet magnetics. Use Value: Enables operation up to +185 °C ambient, critical for sealed telecom chassis with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33AHE3_A/H | Lower PPPM (600 W), same VBR range, SMB (DO-214AA) package - smaller footprint but reduced surge capacity | Suitable for space-constrained consumer electronics where 1500 W rating is not required | Select when board area is critical and surge threat level is ≤IEC 61000-4-5 Level 2 |
| TPSMC33AHM3_B/I | Identical electrical specs and package; halogen-free molding compound instead of standard RoHS-compliant material | Required for strict environmental compliance in EU automotive Tier 1 supply chains | Choose when halogen-free certification (per IEC 61249-2-21) is mandated |
Compared with TPSMC33AHE3_B/I, SMBJ33AHE3_A/H offers smaller size but sacrifices 60% peak power handling, while TPSMC33AHM3_B/I provides identical protection performance with enhanced material compliance - both require layout review due to differing package dimensions or material certifications.
Availability
TPSMC33AHE3_B/I is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor interfaces, consumer power adapters, and telecom line cards requiring stable component supply and AEC-Q101 assurance.
Supply support for TPSMC33AHE3_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 optoelectronics with emphasis on high-reliability and automotive-grade solutions.
The TPSMC series was developed specifically for high-energy transient suppression in harsh-environment applications, targeting AEC-Q101 compliance, extended temperature operation, and robust surge immunity in automotive and industrial power systems.
FAQ
What is the maximum clamping voltage of the TPSMC33AHE3_B/I under standard test conditions?
The TPSMC33AHE3_B/I has a maximum clamping voltage (VC) of 45.7 V when subjected to its rated peak pulse current of 32.8 A using a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and ensures downstream components see limited overvoltage stress. The clamping performance remains stable across temperature due to the device's +0.089 %/°C VBR coefficient and passivated junction design. TPSMC33AHE3_B/I maintains this specification under JEDEC-standard mounting conditions on 8.0 mm × 8.0 mm copper pads.
Is the TPSMC33AHE3_B/I AEC-Q101 qualified and what does that mean for automotive use?
Yes, the TPSMC33AHE3_B/I is AEC-Q101 qualified - confirmed by Vishay's documentation and ordering code suffix "HE3". This qualification validates performance across temperature cycling, highly accelerated life testing (HALT), and ESD robustness per JESD47, making it suitable for under-hood and body-control module applications. TPSMC33AHE3_B/I supports junction temperatures up to +185 °C and meets MSL Level 1, enabling direct placement into automotive SMT lines without dry-pack requirements.
How does the unidirectional polarity of the TPSMC33AHE3_B/I affect circuit implementation?
The TPSMC33AHE3_B/I is unidirectional, meaning it conducts only during reverse-bias overvoltage events - the cathode must be connected to the protected line and the anode to ground. It does not suppress positive transients on grounded lines or negative excursions on supply rails. Unlike bidirectional TVS devices, TPSMC33AHE3_B/I cannot be used across differential pairs or AC-coupled signals without additional circuitry. Its polarity is marked by a visible band on the SMC package body.
What is the standoff voltage (VWM) of the TPSMC33AHE3_B/I and why is it important?
The standoff voltage (VWM) of the TPSMC33AHE3_B/I is 28.2 V - the maximum continuous reverse voltage it can block while maintaining leakage current ≤1 μA at 25 °C. This parameter ensures the device remains non-conductive during normal operation, avoiding power loss or interference with upstream regulators. Exceeding VWM risks premature conduction; therefore, TPSMC33AHE3_B/I is selected for 24 V nominal systems where operating voltage stays below 28.2 V, with margin for ripple and tolerance.
Can the TPSMC33AHE3_B/I replace older SMAJ33A or P6SMB33A devices in existing designs?
TPSMC33AHE3_B/I is not a direct drop-in replacement for SMAJ33A or P6SMB33A due to package differences: it uses SMC (DO-214AB), whereas those use SMA (DO-214AC) and SMB (DO-214AA), respectively. While electrical parameters align closely (e.g., VBR, VC, PPPM), the larger SMC footprint requires PCB layout revision. TPSMC33AHE3_B/I offers higher surge rating (1500 W vs. 400 W/600 W) and AEC-Q101 qualification - beneficial for upgrading legacy designs to automotive or industrial standards.
TPSMC33AHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 32.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
TPSMC33AHE3_B/I FAQ
1.How can I place an order for TPSMC33AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMC33AHE3_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 TPSMC33AHE3_B/I reliable?
The price and inventory of TPSMC33AHE3_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 TPSMC33AHE3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMC33AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMC33AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMC33AHE3_B/I?
TPSMC33AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMC33AHE3_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 TPSMC33AHE3_B/I?
For technical support, including TPSMC33AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMC33AHE3_B/I requirements.
6.How does Aetrix verify that TPSMC33AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMC33AHE3_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 TPSMC33AHE3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMC33AHE3_B/I?
All TPSMC33AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMC33AHE3_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 TPSMC33AHE3_B/I part is unused and in its original packaging.
Return procedure for TPSMC33AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMC33AHE3_B/I Tags
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