My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA5J33AHE3_A/I
- Part No.:
- SMA5J33AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33AHE3_A/I.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,485
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA5J33AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power and signal lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR) at 1 mA, 500 W peak pulse power (10/1000 µs), 9.4 A peak pulse current (IPPM), and clamps to ≤53.3 V at rated surge. It is AEC-Q101 qualified and used in automotive ECUs and industrial power supplies.
For engineers reviewing the SMA5J33AHE3_A/I datasheet, SMA5J33AHE3_A/I pinout, SMA5J33AHE3_A/I application, or SMA5J33AHE3_A/I equivalent, key selection criteria include unidirectional polarity, 500 W surge rating, 33 V operating voltage window, AEC-Q101 qualification, and SMA package compatibility with automated SMT assembly.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold (VBR), limiting transient overvoltages to a controlled clamping voltage (VC ≤ 53.3 V). Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
The device is rated for 150 °C maximum junction temperature, has a thermal resistance of 80 °C/W (junction-to-ambient), and is mounted on 5.0 mm × 5.0 mm copper pads per terminal. Its matte tin-plated leads meet J-STD-002 solderability and JESD22-B102 whisker test requirements (Class 2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system operating voltage. |
| VC @ IPPM | ≤53.3 V at 9.4 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 500 W - Peak pulse power handling capability; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| Package | SMA (DO-214AC) - Surface-mount package with 2.54 mm lead pitch; compatible with standard reflow profiles and automated placement. |
| AEC-Q101 | Qualified - Validated for automotive underhood and body electronics applications per stress test requirements. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return in unidirectional configuration; completes clamping loop during transients. |
| Cathode | Reverse-biased input / Protected line connection | Connected to the line being protected (e.g., 33 V rail); avalanche conduction initiates here when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress. |
| Low profile SMA package | Enables compact PCB layout in space-constrained automotive modules and industrial controllers. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without moisture-related popcorning; no pre-bake required before assembly. |
| 500 W peak pulse power | Provides margin for repetitive surge events in 12 V/24 V automotive systems per ISO 7637-2 Pulse 1/2/5a. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting microcontroller GPIOs and CAN transceiver power rails from load dump and alternator ripple in BCMs. IC Role / Device Role: Unidirectional clamping TVS placed between 33 V supply and ground near IC power pins. Use Value: Limits transient excursions to ≤53.3 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces. | Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to field wiring surges. IC Role / Device Role: Primary surge suppression element on input front-end, upstream of optocoupler or Schmitt trigger. Use Value: Absorbs up to 500 W of energy from inductive kickback (e.g., solenoid de-energization), maintaining signal integrity. |
| Telecom Power Supply Input Stage | Consumer Appliance Motor Drive Board |
Use Scenario: Secondary-level transient protection on +33 V bias rail feeding RF amplifiers and clock buffers. IC Role / Device Role: Standoff-clamp TVS ensuring stable bias voltage during AC line transients and EFT bursts. Use Value: Maintains VWM = 33 V compatibility while clamping surges to <53.3 V, preserving downstream analog performance. | Use Scenario: Overvoltage protection on H-bridge high-side driver supply in smart washing machine motor control boards. IC Role / Device Role: Unidirectional TVS connected between 33 V gate drive rail and ground to suppress MOSFET switching spikes. Use Value: Fast response (<1 ns) and low clamping voltage prevent false turn-on and shoot-through in half-bridge configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J33AE3/61 | Same electrical specs; RoHS-compliant commercial grade (non-AEC-Q101); packaged in 7" tape (1800 pcs). | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive qualification requirements and volume demand fits 7" reel format. |
| SMA5J33AHM3_A/I | Halogen-free, RoHS-compliant, AEC-Q101 qualified; identical VWM/VBR/PPPM; same 13" tape packaging. | No functional difference; differs only in material composition (halogen-free molding compound). | Choose when halogen-free compliance is required by OEM environmental specifications or regional regulations. |
Compared with SMA5J33AHE3_A/I, SMA5J33AE3/61 omits AEC-Q101 validation and uses standard RoHS materials, while SMA5J33AHM3_A/I retains full automotive qualification with halogen-free construction-both share identical clamping behavior and surge ratings but address distinct compliance and sourcing needs.
Availability
SMA5J33AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply with AEC-Q101 assurance and 13-inch tape delivery.
Supply support for SMA5J33AHE3_A/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, MOSFETs, and protection devices with emphasis on reliability and high-power density.
The SMA5J series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and surface-mount scalability are critical.
FAQ
What is the maximum clamping voltage of the SMA5J33AHE3_A/I under a 10/1000 µs surge?
The SMA5J33AHE3_A/I clamps to a maximum of 53.3 V when subjected to its rated peak pulse current of 9.4 A (10/1000 µs waveform). This value is measured at the device terminals under standardized test conditions with 5.0 mm × 5.0 mm copper pads per lead, and defines the upper voltage limit imposed on protected circuits during surge events.
Is the SMA5J33AHE3_A/I suitable for automotive applications?
Yes, the SMA5J33AHE3_A/I is AEC-Q101 qualified, making it suitable for automotive applications including engine control units, body control modules, and infotainment power supplies. Its qualification covers stress tests for temperature cycling, humidity, mechanical shock, and surge endurance-ensuring reliability in under-hood and cabin environments.
What does the "HE3" suffix indicate in SMA5J33AHE3_A/I?
The "HE3" suffix in SMA5J33AHE3_A/I denotes RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates halogen-free material option, "E3" confirms RoHS compliance, and the "_A/I" specifies packaging in 13-inch tape (7500 pcs) with revision code A.
How does the SMA5J33AHE3_A/I differ from bidirectional variants like SMA5J33CA?
The SMA5J33AHE3_A/I is unidirectional and features a cathode band marking; it conducts only in reverse avalanche mode. In contrast, SMA5J33CA is bidirectional with symmetrical clamping in both polarities and no polarity marking. Their VWM and clamping values differ: SMA5J33CA has VWM = 33 V but higher VC due to dual-junction structure, making SMA5J33AHE3_A/I preferred for DC-biased lines.
What is the thermal resistance of the SMA5J33AHE3_A/I, and how does it affect PCB layout?
The SMA5J33AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under worst-case 500 W surge duty, designers must ensure adequate copper area and avoid excessive ambient temperature buildup-especially in sealed enclosures or stacked board assemblies.
SMA5J33AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 9.4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J33AHE3_A/I FAQ
1.How can I place an order for SMA5J33AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33AHE3_A/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 SMA5J33AHE3_A/I reliable?
The price and inventory of SMA5J33AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J33AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMA5J33AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33AHE3_A/I?
SMA5J33AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33AHE3_A/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 SMA5J33AHE3_A/I?
For technical support, including SMA5J33AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33AHE3_A/I requirements.
6.How does Aetrix verify that SMA5J33AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMA5J33AHE3_A/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 SMA5J33AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMA5J33AHE3_A/I?
All SMA5J33AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33AHE3_A/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 SMA5J33AHE3_A/I part is unused and in its original packaging.
Return procedure for SMA5J33AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J33AHE3_A/I 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 …
