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Vishay General Semiconductor - Diodes Division SMA5J33-E3/61
- Part No.:
- SMA5J33-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33-E3/61.pdf
- Description:
- TVS DIODE 33VWM 59VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J33-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection of DC power rails 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 widely used in automotive ECUs and industrial motor drives to protect MOSFETs and microcontrollers from inductive switching transients.
For engineers reviewing the SMA5J33-E3/61 datasheet, SMA5J33-E3/61 pinout, SMA5J33-E3/61 application, or SMA5J33-E3/61 equivalent, key selection criteria include its unidirectional polarity, 500 W surge rating, 33 V operating voltage window, AEC-Q101 qualification status, and compatibility with automated SMT assembly on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamping device that remains high-impedance below VWM = 33 V and rapidly avalanches above VBR (min 36.7 V) to limit transient energy. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns), critical for protecting sensitive CMOS inputs.
The device is rated for 150 °C maximum junction temperature and exhibits low incremental surge resistance, enabling effective suppression of 8.3 ms half-sine surges up to 40 A (IFSM) and repetitive 10/1000 µs transients up to 500 W. Thermal resistance is 80 °C/W (junction-to-ambient) on standard PCB pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 3.3 V/5 V/12 V/24 V systems. |
| VBR (min/max) | 36.7 V / 40.6 V at 1 mA - Ensures reliable turn-on above nominal rail; guarantees clamping starts no earlier than 36.7 V under production tolerance. |
| VC @ IPPM | ≤53.3 V at 9.4 A - Clamped voltage during 500 W transient; determines maximum stress imposed on protected downstream ICs. |
| PPPM | 500 W (10/1000 µs) - Peak surge power handling capability; validates suitability for ISO 7637-2 Pulse 1/2a/5a automotive transients. |
| IFSM | 40 A (8.3 ms half-sine) - Surge current rating for single-event inductive kick; supports protection of power MOSFETs in relay or solenoid drivers. |
| Junction Temp | -55 °C to +150 °C - Enables operation in under-hood automotive and industrial environments without derating. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, low-profile plastic case with matte tin-plated leads. Complies with UL 94 V-0, MSL Level 1 (260 °C reflow), and JESD201 Class 1A whisker test (E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected circuit side (anode connected to ground or return path) | Unidirectional conduction: conducts only when cathode is >36.7 V above anode; blocks reverse current up to 33 V. |
| Anode | Ground/reference node connection | Provides low-impedance path to common reference during clamping; must be routed with minimal inductance for effective transient shunting. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for engine control, body electronics, and ADAS modules. |
| Glass-passivated junction | Ensures stable VBR and low leakage (<1 µA) across temperature and lifetime; eliminates parameter drift in harsh environments. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients; improves clamping precision compared to higher-Rsurge TVS devices. |
| MSL Level 1, 260 °C compatible | Enables standard lead-free reflow without preconditioning; eliminates moisture-related popcorning risk during manufacturing. |
Applications
| Automotive Power Supply Protection | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed MCU power rails in engine control units against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VCC and GND, triggered by transients exceeding 36.7 V. Use Value: Limits voltage seen by 33 V-rated LDOs and microcontrollers to ≤53.3 V during 500 W ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding gate drivers and feedback sensors in 3-phase inverter stages exposed to IGBT switching noise and inductive kickback. IC Role / Device Role / Timing Role: Rail clamp on auxiliary 15 V supply feeding optocouplers and isolated gate drivers. Use Value: Prevents false triggering and latch-up in isolated gate drivers by suppressing sub-100 ns spikes to <53.3 V. |
| Telecom DC Power Input | Consumer Appliance Mainboard |
Use Scenario: Shielding PoE-powered Ethernet switch ports from lightning-induced surges entering via 48 V DC input. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V input rail upstream of DC/DC converters and PMICs. Use Value: Absorbs 500 W surge energy while maintaining <53.3 V clamping to prevent damage to 40 V-rated buck controllers. |
Use Scenario: Securing 5 V USB-C PD interface and display backlight drivers in smart home hubs against ESD and hot-plug transients. IC Role / Device Role / Timing Role: Point-of-load TVS on 5 V rail feeding USB controller and LED driver ICs. Use Value: Provides <1 ns response and <1 µA leakage at 5 V, ensuring zero impact on standby current and signal 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 |
|---|---|---|---|
| SMA5J33AHE3/61 | AEC-Q101 qualified (SMA5J33-E3/61 is commercial grade); identical electrical specs and DO-214AC package. | Required for automotive OEM designs requiring full AEC-Q101 documentation and traceability; not needed for industrial/commercial use. | Select SMA5J33AHE3/61 when automotive qualification is mandatory; otherwise SMA5J33-E3/61 offers same performance at lower cost. |
| SMCJ33A-E3/57T | Higher 1500 W PPPM, larger DO-214AB (SMC) package, 33 V VWM, 36.7–40.6 V VBR, 33.3 A IPPM. | Used where higher surge margin is required (e.g., outdoor telecom cabinets); incompatible with SMA footprint. | Choose SMCJ33A-E3/57T only if 1500 W rating is essential and board layout allows SMC package; SMA5J33-E3/61 fits space-constrained designs. |
Compared with SMA5J33AHE3/61, the SMA5J33-E3/61 lacks formal AEC-Q101 certification but matches all electrical and thermal specs-ideal for cost-sensitive industrial applications. Versus SMCJ33A-E3/57T, it trades surge capacity for compact size, enabling placement near ICs on dense PCBs without redesign.
Availability
SMA5J33-E3/61 is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and telecom power supply validation requiring stable component supply, RoHS-compliant sourcing, and consistent tape-and-reel delivery.
Supply support for SMA5J33-E3/61 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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SMA5J series was engineered specifically for high-power-density surface-mount transient suppression in space-constrained, high-surge environments-emphasizing AEC-Q101 readiness, low leakage, and repeatable clamping performance.
FAQ
What is the polarity configuration of the SMA5J33-E3/61?
The SMA5J33-E3/61 is a unidirectional TVS diode, with the cathode identified by a band on the DO-214AC (SMA) package. It conducts only when the cathode voltage exceeds the anode by ≥36.7 V, making it suitable for DC rail protection where polarity is fixed. This differs from bi-directional variants like SMA5J33CA, which suppress transients in both directions.
Does the SMA5J33-E3/61 meet automotive qualification standards?
No-the SMA5J33-E3/61 carries the E3 suffix indicating RoHS-compliant commercial grade. For AEC-Q101 qualification, the correct part is SMA5J33AHE3/61 (HE3 suffix). Both share identical electrical parameters and DO-214AC packaging, but only the HE3 version includes full automotive reliability testing and documentation.
What is the maximum clamping voltage of the SMA5J33-E3/61 under surge conditions?
The SMA5J33-E3/61 clamps to a maximum of 53.3 V when subjected to its rated 9.4 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is guaranteed across production lots and temperature range, defining the upper voltage limit imposed on protected circuitry during transient events.
Can the SMA5J33-E3/61 be used in place of a bi-directional TVS like SMA5J33CA?
No-SMA5J33-E3/61 is unidirectional and will not suppress negative-going transients. Substituting it for SMA5J33CA in AC-coupled or floating signal line applications risks failure during reverse-polarity surges. Always match polarity type to system architecture: use unidirectional for DC rails with known ground reference, bi-directional for AC or differential lines.
What PCB pad layout is recommended for optimal thermal and electrical performance of the SMA5J33-E3/61?
Vishay specifies mounting the SMA5J33-E3/61 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 500 W pulse power and 80 °C/W thermal resistance. Smaller pads increase junction temperature and reduce surge capability; internal copper planes and thermal vias further improve heat dissipation in high-reliability designs.
SMA5J33-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 8.5A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J33-E3/61 FAQ
1.How can I place an order for SMA5J33-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33-E3/61 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 SMA5J33-E3/61 reliable?
The price and inventory of SMA5J33-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J33-E3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J33-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33-E3/61?
SMA5J33-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33-E3/61 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 SMA5J33-E3/61?
For technical support, including SMA5J33-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33-E3/61 requirements.
6.How does Aetrix verify that SMA5J33-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J33-E3/61 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 SMA5J33-E3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J33-E3/61?
All SMA5J33-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33-E3/61, 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 SMA5J33-E3/61 part is unused and in its original packaging.
Return procedure for SMA5J33-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J33-E3/61 Tags
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