My Inquiry
My Account
Vishay General Semiconductor - Diodes Division TPSMA33AHE3_B/H
- Part No.:
- TPSMA33AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA33AHE3_B/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,710
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPSMA33AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for clamping inductive switching and lightning-induced transients on power rails and signal lines. It features a 33 V nominal breakdown voltage (VBR), 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 - deployed in automotive power supply protection and industrial sensor interface circuits.
For engineers reviewing the TPSMA33AHE3_B/H datasheet, TPSMA33AHE3_B/H pinout, TPSMA33AHE3_B/H application, or TPSMA33AHE3_B/H equivalent, key selection criteria include unidirectional polarity, SMA (DO-214AC) package compatibility, AEC-Q101 qualification status, TJ = 185 °C thermal rating, and clamping performance under 10/1000 µs surge conditions.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology with optimized junction passivation for stable clamping across temperature. Its unidirectional configuration provides forward conduction only during overvoltage events, enabling precise rail-to-rail transient suppression without reverse leakage degradation at high VWM (28.2 V).
The device delivers 400 W peak pulse power with low incremental surge resistance and fast response time (<1 ns), meeting IEC 61000-4-5 surge immunity requirements when mounted on 5.0 mm × 5.0 mm copper pads. It is rated for repetitive 0.01 % duty cycle pulses and qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 V / 33.0 V / 34.7 V - ensures reliable triggering above 28.2 V stand-off voltage while accommodating ±5 % tolerance and temperature drift. |
| VC @ IPPM | 45.7 V at 8.8 A - limits downstream IC voltage stress during 10/1000 µs transients, protecting 3.3 V–24 V logic and power stages. |
| PPPM | 400 W - sustains single-event surges per IEC 61000-4-5 Level 4 (4 kV) when PCB layout meets recommended pad dimensions. |
| TJ max. | +185 °C - enables operation in engine control units, motor drives, and industrial PLCs without derating below ambient +125 °C. |
| Polarity | Unidirectional - blocks reverse leakage at VWM ≤ 28.2 V while conducting forward surges, suitable for DC power line protection. |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" length, compatible with automated pick-and-place and reflow profiles up to 260 °C. |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD per JESD22-A114, supporting under-hood use. |
Pinout & Package
TPSMA33AHE3_B/H is housed in an SMA (DO-214AC) surface-mount package with two terminals: cathode marked by a color band, and anode unmarked. The package conforms to JEDEC DO-214AC mechanical dimensions and supports soldering per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line (e.g., 24 V rail); conducts surge current to ground during overvoltage events. |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping path with minimal inductance for sub-ns response. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier process reduces parameter drift over 1000+ thermal cycles and extends lifetime in high-humidity environments. |
| Clamping ratio (VC/VBR) | 1.39 - low ratio ensures tight voltage limiting relative to breakdown, minimizing margin needed between VBR and IC absolute maximum ratings. |
| MSL Level 1 | Moisture sensitivity level 1 per J-STD-020 - allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead. |
| Surge robustness | Withstands 40 A IFSM (8.3 ms half-sine) - protects against load dump and relay coil de-energization in 12 V/24 V automotive systems. |
| Temperature coefficient of VBR | +0.089 %/°C - enables predictable clamping shift over -65 °C to +185 °C, critical for engine bay and industrial outdoor deployments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in engine control modules from ISO 7637-2 load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC input, absorbing >400 W transients within nanoseconds. Use Value: Prevents latch-up or destruction of downstream PMICs and microcontrollers by limiting voltage to ≤45.7 V during 10/1000 µs surges. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) of pressure sensors from ESD and field wiring transients. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across signal and ground, leveraging fast response to suppress <100 ns ESD events. Use Value: Maintains signal integrity with <1 µA leakage at 28.2 V, avoiding offset errors in precision 16-bit DAC outputs. |
| Telecom Line Card Surge Suppression | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding Ethernet PHY power pins and auxiliary bias rails in base station line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on 3.3 V/5 V auxiliary supplies, coordinated with secondary GDT or MOV stages. Use Value: Delivers 400 W pulse handling with 185 °C TJ rating, ensuring reliability in sealed, fanless telecom enclosures. |
Use Scenario: Suppressing back-EMF from brushed DC motors in washing machine control boards during commutation. IC Role / Device Role / Timing Role: Mounted directly across motor terminals or H-bridge supply rails to clamp inductive kickback. Use Value: Withstands repetitive 0.01 % duty cycle surges and 40 A IFSM, eliminating need for external snubbers in cost-sensitive white goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | Same VBR range (31.4–34.7 V) but SMB package (DO-214AA); 600 W PPPM; higher VC (53.3 V); MSL Level 1. | Larger footprint; better suited for higher-energy surges where board space permits; not AEC-Q101 qualified in standard version. | Select SMBJ33A only if 600 W rating is required and AEC-Q101 is not mandatory; verify PCB pad layout compatibility. |
| 1.5SMC33A | Same VBR and VC; SMC (DO-214AB) package; 1500 W PPPM; 1.0 W PD; TJ = 175 °C; RoHS-compliant. | Higher surge capacity but larger body; lower max junction temperature; no AEC-Q101 qualification unless specified as HM3 variant. | Choose 1.5SMC33A for non-automotive industrial applications needing >400 W headroom; confirm thermal derating at elevated ambient. |
Compared with SMBJ33A and 1.5SMC33A, TPSMA33AHE3_B/H offers the smallest footprint (SMA), highest junction temperature rating (+185 °C), and guaranteed AEC-Q101 qualification - making it optimal for space-constrained, high-reliability automotive and industrial designs where thermal margin and qualification compliance are decisive.
Availability
TPSMA33AHE3_B/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface circuits, telecom line card surge suppression, and consumer appliance motor drive protection requiring stable component supply and AEC-Q101 traceability.
Supply support for TPSMA33AHE3_B/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-grade qualification.
The TPSMA33AHE3_B/H belongs to Vishay's PAR® series of surface-mount TVS diodes, engineered specifically for high-temperature, high-reliability transient suppression in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the breakdown voltage tolerance for TPSMA33AHE3_B/H?
The TPSMA33AHE3_B/H has a breakdown voltage (VBR) range of 31.4 V (min) to 34.7 V (max) at 1.0 mA test current, yielding a ±5 % nominal tolerance around 33.0 V. This tolerance remains stable across operating temperatures due to its +0.089 %/°C temperature coefficient, and is verified per ANSI/IEEE C62.35 standards in the official Vishay datasheet (Doc. #88405).
Is TPSMA33AHE3_B/H AEC-Q101 qualified?
Yes, TPSMA33AHE3_B/H is AEC-Q101 qualified - confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101-qualified construction. Qualification covers temperature cycling, high-temperature reverse bias (HTRB), and ESD testing per JESD22-A114, supporting deployment in automotive under-hood environments up to +185 °C junction temperature.
What is the maximum clamping voltage of TPSMA33AHE3_B/H at rated surge current?
The TPSMA33AHE3_B/H exhibits a maximum clamping voltage (VC) of 45.7 V at 8.8 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured with the device mounted on 5.0 mm × 5.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does TPSMA33AHE3_B/H support lead-free reflow soldering?
Yes, TPSMA33AHE3_B/H supports lead-free reflow soldering with a maximum peak temperature of 260 °C, meeting J-STD-020 Moisture Sensitivity Level 1 requirements. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102, and the molding compound satisfies UL 94 V-0 flammability rating - enabling compatibility with standard Pb-free assembly processes.
How does the unidirectional polarity of TPSMA33AHE3_B/H affect its circuit placement?
The unidirectional polarity of TPSMA33AHE3_B/H requires the banded (cathode) end to be connected toward the protected line (e.g., 24 V rail), while the anode connects to ground. This orientation enables forward conduction during positive transients only, minimizing reverse leakage (<1.0 µA at 28.2 V) and avoiding unintended conduction in bidirectional AC or floating signal paths.
TPSMA33AHE3_B/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:
- 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/H FAQ
1.How can I place an order for TPSMA33AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA33AHE3_B/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_B/H reliable?
The price and inventory of TPSMA33AHE3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for TPSMA33AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA33AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA33AHE3_B/H?
TPSMA33AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA33AHE3_B/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_B/H?
For technical support, including TPSMA33AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA33AHE3_B/H requirements.
6.How does Aetrix verify that TPSMA33AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All TPSMA33AHE3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of TPSMA33AHE3_B/H?
All TPSMA33AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA33AHE3_B/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_B/H part is unused and in its original packaging.
Return procedure for TPSMA33AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA33AHE3_B/H 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
