My Inquiry
My Account
Vishay General Semiconductor - Diodes Division TPSMA33HE3/5AT
- Part No.:
- TPSMA33HE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA33HE3/5AT.pdf
- Description:
- TVS DIODE 26.8VWM 47VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,582
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPSMA33HE3/5AT 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 a 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 28.2 V stand-off voltage (VWM), 45.7 V maximum clamping voltage (VC) at 8.8 A peak pulse current, 400 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - ideal for automotive power rail protection.
For engineers reviewing the TPSMA33HE3/5AT datasheet, TPSMA33HE3/5AT pinout, TPSMA33HE3/5AT application, or TPSMA33HE3/5AT equivalent, this page delivers verified electrical parameters, thermal derating behavior, AEC-Q101 qualification status, RoHS-compliant construction, and real-world clamping performance under repetitive surge conditions.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve low incremental surge resistance and excellent clamping capability with sub-nanosecond response time. Its unidirectional polarity and 1.0 W steady-state power dissipation support continuous operation in DC-biased circuits such as automotive battery inputs and industrial sensor supply rails.
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 under-hood automotive environments where thermal stability and reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 V / 33.0 V / 34.7 V at 1 mA - defines precise voltage threshold where clamping begins under controlled test conditions |
| VWM | 28.2 V - maximum continuous reverse voltage before leakage exceeds 1 μA; sets safe operating margin below breakdown |
| VC @ IPPM | 45.7 V at 8.8 A - clamped voltage during 10/1000 µs surge; determines protected circuit's worst-case overvoltage exposure |
| PPPM | 400 W - peak pulse power handling capacity; enables robust protection against lightning-induced surges and inductive switching spikes |
| TJ max. | +185 °C - extended junction temperature rating supports placement near heat sources in engine control units and power converters |
| Polarity | Unidirectional - protects only against positive transients relative to cathode; requires correct orientation in series with DC supply lines |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint and matte tin-plated leads compliant with J-STD-002 solderability |
Pinout & Package
SMA (DO-214AC) package with axial lead configuration: cathode indicated by color band; anode and cathode terminals mounted on PCB using 5.0 mm × 5.0 mm copper pads per terminal for optimal thermal and surge current handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts transient energy to ground when voltage exceeds VBR; must be routed with low-inductance path to chassis or power ground |
| Anode | Reference/return node | Typically tied to system ground or lower-potential rail; completes conduction path during clamping; layout must minimize loop inductance to preserve response speed |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift < ±5 % over lifetime and 1000-hour HTOL testing at 150 °C |
| AEC-Q101 qualification (HE3 suffix) | Validates reliability for automotive applications including engine control modules, body electronics, and ADAS power supplies |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing at 260 °C peak without popcorn cracking or delamination |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (< 1 ns rise time), improving protection margin for sensitive ICs |
| RoHS-compliant & halogen-free option (HM3) | Meets automotive OEM chemical compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1) without compromising surge performance |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator ripple transients in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Primary clamping element placed between battery input and upstream DC-DC converter input stage. Use Value: Limits transient voltage to ≤45.7 V during 400 W surges, preventing damage to downstream LDOs and microcontrollers rated for 40 V absolute maximum. | Use Scenario: Safeguarding analog output lines of pressure/temperature sensors in factory automation PLC I/O modules exposed to relay coil switching noise. IC Role / Device Role / Timing Role: Bidirectional suppression not required; unidirectional TPSMA33HE3/5AT placed on powered signal line referenced to local ground. Use Value: Clamps induced spikes to <46 V while maintaining <1 μA leakage at 28.2 V, preserving sensor accuracy and ADC reference integrity. |
| Telecom DC Power Input Protection | Computer Peripheral USB VBUS Line Protection |
Use Scenario: Front-end surge protection for PoE-powered network switches and base station remote radio units operating from -48 V DC supplies. IC Role / Device Role / Timing Role: Reverse-connected across input capacitor to clamp negative-going transients on telecom power bus. Use Value: Withstands 40 A surge current (8.3 ms) and maintains 185 °C operational capability in sealed enclosures with limited airflow. | Use Scenario: Overvoltage protection on USB 3.0 VBUS lines in docking stations and external GPU enclosures subject to hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and ground, sized to handle 10/1000 µs surges per IEC 61000-4-5 Level 3. Use Value: Achieves 45.7 V clamping at 8.8 A while adding <1 pF junction capacitance - negligible impact on 5 Gbps USB signaling integrity. |
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 | Same VBR range (31.4–34.7 V), but SMB (DO-214AA) package - 20 % larger footprint and 10 % higher thermal resistance | Preferred where board space allows larger pad layout and higher steady-state power dissipation (2.0 W vs. 1.0 W) is needed | Select SMBJ33A only if thermal margin >1.5× required and PCB layout accommodates 0.236" × 0.157" footprint |
| SMCJ33A | Higher PPPM (1500 W), same VC (45.7 V), but SMC (DO-214AB) package - 3× larger size and 3× higher unit cost | Used in high-energy industrial motor drives where 400 W is insufficient; not suitable for space-constrained automotive modules | Choose SMCJ33A only when surge threat level exceeds IEC 61000-4-5 Level 4 (4 kV/2 Ω) and layout permits 0.276" × 0.197" footprint |
Compared with SMBJ33A and SMCJ33A, the TPSMA33HE3/5AT delivers identical clamping performance in the smallest possible surface-mount form factor, enabling compact placement directly at connector entry points while meeting AEC-Q101 and MSL Level 1 requirements out-of-the-box.
Availability
TPSMA33HE3/5AT is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power input stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for TPSMA33HE3/5AT 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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive-grade qualification.
The TPSMA33HE3/5AT belongs to Vishay's PAR® (Protection and Regulation) TVS family, engineered specifically for high-temperature, high-reliability transient suppression in automotive and industrial power systems where failure is not an option.
FAQ
What is the exact breakdown voltage range for TPSMA33HE3/5AT?
The TPSMA33HE3/5AT has a guaranteed breakdown voltage (VBR) range of 31.4 V to 34.7 V at 1 mA test current, with nominal value of 33.0 V. This range is measured per ANSI/IEEE C62.35 and confirmed in Vishay's official datasheet revision 23-Jan-2024 (Document Number: 88405). The TPSMA33HE3/5AT maintains this specification across its full operating temperature range.
Is TPSMA33HE3/5AT qualified to AEC-Q101?
Yes, the TPSMA33HE3/5AT carries the HE3 suffix, which explicitly denotes RoHS-compliant construction and full AEC-Q101 qualification per Vishay's ordering nomenclature. This certification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - all validated for automotive under-hood deployment.
What is the maximum clamping voltage of TPSMA33HE3/5AT under surge conditions?
The TPSMA33HE3/5AT exhibits a maximum clamping voltage (VC) of 45.7 V when subjected to its rated 8.8 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on specified PCB pad layout and defines the upper voltage limit imposed on protected circuitry during transient events.
Can TPSMA33HE3/5AT be used in bidirectional protection circuits?
No, the TPSMA33HE3/5AT is unidirectional only, as confirmed in the "Features" section of its datasheet. It conducts surge current only when the cathode is more positive than the anode. For bidirectional protection, a dedicated bidirectional TVS like SMAJ33CA or two back-to-back unidirectional devices would be required - the TPSMA33HE3/5AT does not support reverse-polarity clamping.
What is the thermal derating behavior of TPSMA33HE3/5AT above 25 °C ambient?
The TPSMA33HE3/5AT follows linear thermal derating per Figure 2 in its datasheet: peak pulse power (PPPM) decreases by approximately 0.5 % per °C above 25 °C ambient, reaching ~50 % of rated 400 W at 125 °C case temperature. This behavior is inherent to silicon junction physics and applies regardless of mounting method, provided the 5.0 mm × 5.0 mm copper pad layout is maintained.
TPSMA33HE3/5AT 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):
- 26.8V
- Voltage - Breakdown (Min):
- 29.7V
- Voltage - Clamping (Max) @ Ipp:
- 47V
- Current - Peak Pulse (10/1000µs):
- 8.4A
- 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)
TPSMA33HE3/5AT FAQ
1.How can I place an order for TPSMA33HE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA33HE3/5AT 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 TPSMA33HE3/5AT reliable?
The price and inventory of TPSMA33HE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA33HE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA33HE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA33HE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA33HE3/5AT?
TPSMA33HE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA33HE3/5AT 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 TPSMA33HE3/5AT?
For technical support, including TPSMA33HE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA33HE3/5AT requirements.
6.How does Aetrix verify that TPSMA33HE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA33HE3/5AT 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 TPSMA33HE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA33HE3/5AT?
All TPSMA33HE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA33HE3/5AT, 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 TPSMA33HE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA33HE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA33HE3/5AT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
