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Vishay General Semiconductor - Diodes Division TPSMC33AHE3_A/H
- Part No.:
- TPSMC33AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
TPSMC33AHE3_A/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPSMC33AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 28.2 V stand-off voltage (VWM), 45.7 V clamping voltage (VC) at 32.8 A peak pulse current, and 1500 W peak pulse power (10/1000 µs). It is AEC-Q101 qualified and rated for operation up to +185 °C junction temperature - used to protect automotive sensor signal lines and MOSFET gate drivers against inductive switching transients.
For engineers reviewing the TPSMC33AHE3_A/H datasheet, TPSMC33AHE3_A/H pinout, TPSMC33AHE3_A/H application, or TPSMC33AHE3_A/H equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal derating above 25 °C ambient, unidirectional polarity compatibility with DC-biased signal paths, and AEC-Q101 qualification status for automotive deployment.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology to achieve low incremental surge resistance and excellent clamping response under high-current transients. Its junction design supports stable operation up to TJ = +185 °C, enabling use in under-hood automotive environments without thermal derating penalties beyond those specified in Fig. 2 of the datasheet.
The device operates exclusively in unidirectional mode, with cathode marked by a band on the SMC package. It delivers 1500 W peak pulse power per 10/1000 µs waveform when mounted on 8.0 mm × 8.0 mm copper pads, and exhibits a typical VBR temperature coefficient of +0.089 %/°C - critical for predicting breakdown shift across wide temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 / 33.0 / 34.7 V at 1 mA - defines minimum voltage at which clamping initiates; must exceed system operating voltage to avoid leakage conduction during normal operation |
| VWM | 28.2 V - maximum continuous reverse working voltage; sets upper limit for safe DC bias before significant leakage begins |
| VC @ IPPM | 45.7 V at 32.8 A - clamped voltage seen by protected circuit during worst-case surge; must stay below downstream IC's absolute maximum rating |
| PPPM | 1500 W (10/1000 µs) - peak transient energy absorption capacity; determines survivability against ISO 7637-2 Pulse 1/2a/5a events |
| TJ max. | +185 °C - enables placement near heat sources (e.g., power modules) without derating loss; validated per AEC-Q101 stress test conditions |
| Polarity | Unidirectional - suitable only for DC-biased or positive-going transient protection; not usable for AC or bidirectional signal lines |
| MSL Level | Level 1 (J-STD-020) - allows unlimited floor life and reflow at 260 °C peak; no baking required prior to assembly |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by color band. Meets UL 94 V-0 flammability rating. Dimensions: 7.11 mm × 6.60 mm × 2.90 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or reverse clamping | Connected to lower-potential side of protected line (e.g., ground or return path); forms clamping path with cathode |
| Cathode | Current exit point during clamping; marked by band | Connected to higher-potential side (e.g., supply rail or signal line); determines polarity and direction of transient shunting |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Reduces leakage drift over time and temperature; ensures long-term stability of VBR and VWM in harsh automotive environments |
| 1500 W peak pulse power (10/1000 µs) | Withstands high-energy transients such as load dump (ISO 16750-2) and inductive kickback without degradation |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade reliability including HTGB, HTRB, and temperature cycling - required for engine control, ADAS, and body electronics |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection fidelity for sensitive microcontrollers |
| TJ = +185 °C capability | Supports mounting directly on PCBs adjacent to power semiconductors or in high-ambient zones (e.g., transmission control units) |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Gate Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine management systems exposed to alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches the sensor's ADC input or signal conditioning amplifier. Use Value: Clamps to 45.7 V while limiting peak current to 32.8 A, ensuring sensor IC remains within its 50 V absolute maximum rating and avoids latch-up. | Use Scenario: Safeguarding high-side gate driver inputs in 48 V industrial motor inverters subjected to cross-conduction spikes and bus voltage overshoot. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed between gate driver output and MOSFET gate, referenced to source potential. Use Value: Sub-1 ns response time and 0.089 %/°C VBR TC maintain consistent clamping threshold across -40 °C to +150 °C operating range. |
| Telecom Line Interface Protection | Computer Power Rail Surge Suppression |
Use Scenario: Shielding RS-485 transceiver I/O pins in outdoor base station equipment from lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary unidirectional surge arrestor on differential data lines, installed with minimal trace inductance. Use Value: 1500 W rating and 45.7 V clamping enable compliance with ITU-T K.21 basic protection level for telecom infrastructure. | Use Scenario: Adding secondary surge suppression on +24 V auxiliary rails in server PSUs where primary MOVs may not fully suppress fast transients. IC Role / Device Role / Timing Role: Secondary clamping device placed downstream of bulk filtering, protecting DC-DC controller enable pins and sense resistors. Use Value: MSL Level 1 reflow compatibility allows seamless integration into automated SMT lines without pre-baking logistics. |
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-E3/5A (Vishay) | Same VBR range (31.4–34.7 V) but lower PPPM = 400 W; SMA package (smaller footprint, lower thermal mass) | Not AEC-Q101 qualified; limited to commercial/industrial use; unsuitable for under-hood automotive | Select when space-constrained and thermal stress is low; verify clamping margin with reduced power handling |
| 1.5KE33A (ON Semiconductor) | Through-hole DO-201 package; same VBR/VC specs but higher VF = 3.5 V; no AEC-Q101 qualification | Requires wave soldering or hand assembly; incompatible with high-speed SMT lines; lacks automotive reliability validation | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMAJ33A-E3/5A and 1.5KE33A, the TPSMC33AHE3_A/H provides superior automotive-grade reliability via AEC-Q101 qualification, higher 1500 W surge capacity, and SMC package thermal robustness - making it the preferred choice for production automotive ECUs and industrial drives requiring zero field returns.
Availability
TPSMC33AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive gate protection, and telecom line interface protection requiring stable component supply, AEC-Q101 compliance, and high-temperature operational integrity.
Supply support for TPSMC33AHE3_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, power efficiency, and automotive qualification.
The TPSMC series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) family, engineered specifically for high-energy transient suppression in demanding automotive and industrial environments where thermal stability and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of the TPSMC33AHE3_A/H and how is it measured?
The TPSMC33AHE3_A/H has a maximum clamping voltage (VC) of 45.7 V at 32.8 A peak pulse current (IPPM), tested with a 10/1000 µs waveform per IEC 61000-4-5. This value represents the highest voltage imposed on the protected circuit during a standardized surge event. The measurement is performed with the device mounted on 8.0 mm × 8.0 mm copper pads per datasheet Fig. 3, and is a critical parameter for verifying that downstream components like microcontrollers or transceivers remain within their absolute maximum voltage ratings during transient events. The TPSMC33AHE3_A/H maintains this clamping performance across its full operating temperature range.
Is the TPSMC33AHE3_A/H suitable for automotive applications?
Yes, the TPSMC33AHE3_A/H is explicitly AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's datasheet revision 19-Jan-2024. It meets all stress tests required for automotive-grade discrete semiconductors, including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. Its +185 °C maximum junction temperature rating and MSL Level 1 reflow compatibility further validate its suitability for engine control units, ADAS camera modules, and body electronics. The TPSMC33AHE3_A/H is designed for automotive environments where reliability under thermal and electrical stress is non-negotiable.
What does the "HE3" suffix mean in TPSMC33AHE3_A/H?
The "HE3" suffix in TPSMC33AHE3_A/H indicates RoHS-compliant construction and AEC-Q101 qualification per Vishay's ordering nomenclature. The "H" denotes the packaging configuration (7″ tape and reel), "E3" specifies the environmental and qualification grade: lead-free, halogen-free compliant, and fully qualified to AEC-Q101 for automotive use. The "_A/H" portion reflects the revision code (A) and packaging variant (H). This suffix ensures traceability to Vishay's certified automotive production lot controls and material declarations - a requirement for TPSMC33AHE3_A/H deployment in Tier 1 automotive supply chains.
How does the TPSMC33AHE3_A/H compare to bidirectional TVS diodes?
The TPSMC33AHE3_A/H is unidirectional only, meaning it conducts and clamps only during reverse-biased transients - ideal for DC-biased signal or power lines where polarity is fixed. Unlike bidirectional TVS diodes (e.g., TPSMC33CA), it cannot suppress negative-going transients on AC or floating lines. Its unidirectional architecture yields lower leakage current at VWM (1.0 µA max at 28.2 V) and tighter VBR tolerance versus bidirectional equivalents. When selecting the TPSMC33AHE3_A/H, confirm system polarity and ensure the protected node has a defined reference (e.g., ground-referenced sensor output), as incorrect polarity connection will prevent clamping functionality.
What is the thermal derating behavior of the TPSMC33AHE3_A/H above 25 °C ambient?
The TPSMC33AHE3_A/H follows the derating curve in Figure 2 of its datasheet: peak pulse power (PPPM) decreases linearly from 1500 W at 25 °C to approximately 750 W at 125 °C ambient, assuming standard PCB mounting (0.31″ × 0.31″ copper pads). Derating is based on junction temperature limits - the device's TJ max. remains +185 °C regardless of ambient, but sustained high ambient reduces allowable surge energy before reaching thermal failure. For designs operating continuously above 85 °C ambient, thermal simulation or empirical testing with the actual PCB layout is recommended to validate margin. The TPSMC33AHE3_A/H's +185 °C rating provides headroom, but real-world derating must account for localized heating from adjacent components.
TPSMC33AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- 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):
- 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 (SMCJ)
TPSMC33AHE3_A/H FAQ
1.How can I place an order for TPSMC33AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMC33AHE3_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 TPSMC33AHE3_A/H reliable?
The price and inventory of TPSMC33AHE3_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 TPSMC33AHE3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMC33AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMC33AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMC33AHE3_A/H?
TPSMC33AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMC33AHE3_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 TPSMC33AHE3_A/H?
For technical support, including TPSMC33AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMC33AHE3_A/H requirements.
6.How does Aetrix verify that TPSMC33AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMC33AHE3_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 TPSMC33AHE3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMC33AHE3_A/H?
All TPSMC33AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMC33AHE3_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 TPSMC33AHE3_A/H part is unused and in its original packaging.
Return procedure for TPSMC33AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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