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Vishay General Semiconductor - Diodes Division SMB10J33A-E3/52
- Part No.:
- SMB10J33A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J33A-E3/52.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,232
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Product details
Overview
SMB10J33A-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) 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), 53.3 V clamping voltage (VC) at 18.8 A peak pulse current (IPPM), and 1000 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive ECUs, industrial sensor interfaces, and DC power rails.
For engineers reviewing the SMB10J33A-E3/52 datasheet, SMB10J33A-E3/52 pinout, SMB10J33A-E3/52 application, or SMB10J33A-E3/52 equivalent, key selection criteria include clamping performance under 10/1000 µs transients, AEC-Q101 qualification status, unidirectional polarity, thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device, leveraging an avalanche breakdown mechanism to divert transient energy away from sensitive downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while its low incremental surge resistance enables rapid response to fast-rising ESD and lightning-induced surges.
The SMB10J33A-E3/52 is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It is RoHS-compliant (E3 suffix), halogen-free option available, and qualified to AEC-Q101 for automotive use - confirming suitability for under-hood and ADAS sensor protection where reliability under thermal cycling and vibration is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 36.7 V / 40.6 V - breakdown voltage range at 1.0 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 53.3 V at 18.8 A - clamping voltage under 10/1000 µs surge; limits stress on protected ICs like CAN transceivers or microcontrollers. |
| PPPM | 1000 W - peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity testing. |
| RθJA | 72 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| IFSM | 100 A - non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against load dump events. |
| Polarity | Unidirectional - cathode marked with band; blocks reverse conduction during normal operation, enabling DC rail protection. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point during clamping | Connected to protected line (e.g., 24 V supply rail); conducts surge current toward ground when V > VBR. |
| Cathode | Reverse-biased terminal; marked with color band | Connected to system ground; defines unidirectional polarity and establishes reference for clamping threshold. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and infotainment - supports 15-year vehicle lifecycle requirements. |
| Glass passivated junction | Ensures stable VBR over time and temperature, reduces parameter drift, and improves long-term reliability in humid or thermally cycled environments. |
| Low profile SMB package | Enables high-density PCB layouts and compatibility with standard pick-and-place equipment; footprint matches industry-standard DO-214AA land pattern. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak without moisture sensitivity concerns - simplifies manufacturing flow. |
| 1000 W peak pulse power | Provides headroom for high-energy transients such as ISO 7637-2 load dump pulses and IEC 61000-4-5 combination wave surges. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs of engine control units (ECUs) against load dump transients up to 60 V and 100 ms duration. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between power rail and chassis ground to shunt surge energy before it reaches LDOs and microcontrollers. Use Value: Limits rail voltage to ≤53.3 V during 10/1000 µs surges, preventing latch-up or permanent damage to downstream ASICs rated for 36 V absolute max. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) of pressure or temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional TVS connected from signal line to local ground to clamp ESD and inductive switching spikes induced by nearby solenoids or motors. Use Value: Maintains signal integrity by clamping transients within 1 ns response time while adding <0.5 pF capacitance - no impact on loop bandwidth up to 10 kHz. |
| DC-DC Converter Input Protection | Automotive CAN Bus Line Protection |
Use Scenario: Shielding input stage of buck converters in ADAS camera modules from battery line transients during cold-crank or jump-start conditions. IC Role / Device Role / Timing Role: Primary surge suppression device placed upstream of input filter capacitors and converter ICs to absorb energy before filtering stages saturate. Use Value: Withstands 100 A IFSM peak forward surge, enabling survival of 12 V system cold-crank pulses (−14 V, 500 ms) without degradation. | Use Scenario: Protecting CAN_H and CAN_L lines in vehicle gateway modules exposed to ESD (±8 kV contact) and coupled transients from high-power actuators. IC Role / Device Role / Timing Role: Paired unidirectional TVS diodes (one per line) referenced to common ground to clamp differential and common-mode surges independently. Use Value: Delivers 53.3 V clamping at 18.8 A while maintaining <1.0 µA leakage at 33 V - avoids false triggering or bus dominant state errors during normal 2.5–3.5 V signaling. |
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-E3/52 | Same SMB package, identical VWM/VBR/VC ratings, but lower PPPM (600 W vs. 1000 W) and IPPM (10.3 A vs. 18.8 A). | Not suitable for IEC 61000-4-5 Level 4 or automotive load dump; limited to lower-energy ESD and inductive spikes. | Select SMBJ33A-E3/52 only when surge threat level is ≤400 W and layout space constraints prevent using higher-power variants. |
| 1.5SMC33AHE3/A | Higher-power SMC package (same VWM/VBR), 1500 W PPPM, 38.3 A IPPM, RθJA = 30 °C/W - requires larger PCB footprint and different pad layout. | Better thermal performance and surge margin; suited for high-reliability industrial power supplies where board area permits. | Choose 1.5SMC33AHE3/A when system-level surge testing exceeds 1000 W or sustained thermal dissipation >1 W is expected during repeated transients. |
Compared with SMBJ33A-E3/52 and 1.5SMC33AHE3/A, SMB10J33A-E3/52 delivers optimal balance of 1000 W surge capacity, AEC-Q101 qualification, and SMB footprint - making it the preferred choice for space-constrained automotive and industrial designs requiring certified high-energy protection without SMC-level board real estate.
Availability
SMB10J33A-E3/52 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and DC-DC converter input protection requiring stable component supply and full traceability.
Supply support for SMB10J33A-E3/52 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, efficiency, and automotive-grade qualification.
The SMB10JxxA series belongs to Vishay's TRANSZORB® high-power TVS family, engineered specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without compromising size or manufacturability.
FAQ
What is the clamping voltage of SMB10J33A-E3/52 under a 10/1000 µs surge?
The SMB10J33A-E3/52 has a maximum clamping voltage (VC) of 53.3 V at 18.8 A peak pulse current (IPPM) under the standardized 10/1000 µs double-exponential waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable voltage limiting during surge events - critical for protecting 36 V-rated ICs in automotive and industrial applications. The SMB10J33A-E3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB10J33A-E3/52 qualified for automotive use?
Yes, SMB10J33A-E3/52 is AEC-Q101 qualified when ordered with the HE3 suffix (e.g., SMB10J33AHE3_A). The base part SMB10J33A-E3/52 is RoHS-compliant and commercial-grade; however, the HE3 variant adds full automotive qualification including stress testing for temperature cycling, humidity, and mechanical shock. For automotive production, specify SMB10J33AHE3_A or confirm qualification status with Vishay's official documentation before design-in. The SMB10J33A-E3/52 itself is not AEC-Q101 qualified unless explicitly ordered with HE3/HM3 suffixes.
What is the thermal resistance of SMB10J33A-E3/52, and how does it affect derating?
The SMB10J33A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value directly determines power derating above 25 °C ambient: for example, at 85 °C ambient, maximum allowable average power drops to ~0.83 W (calculated via (150 °C − 85 °C) / 72 °C/W). Derating curves in Figure 2 of Vishay document 88422 must be applied for accurate surge repetition rate planning. The SMB10J33A-E3/52 relies on PCB copper mass for heat dissipation - insufficient pad area increases RθJA and risks thermal runaway during repeated surges.
Can SMB10J33A-E3/52 be used for bidirectional protection?
No, SMB10J33A-E3/52 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only in reverse breakdown (anode-to-cathode) and blocks forward current beyond ~3.5 V. For bidirectional protection - such as AC signal lines or differential buses like RS-485 - use the "CA" variant (e.g., SMB8J33CA-E3/52), which provides symmetrical clamping for both polarities. Substituting SMB10J33A-E3/52 in bidirectional applications risks forward conduction during normal operation and failure to clamp negative transients.
What is the maximum leakage current of SMB10J33A-E3/52 at its stand-off voltage?
The SMB10J33A-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM) of 33 V, measured at 25 °C. This ultra-low leakage ensures minimal power loss in always-on circuits and prevents false triggering of monitoring circuits or battery-drain issues in low-power automotive modules. Leakage remains below 5 µA up to 85 °C ambient, verified per Vishay's characterization data in document 88422 - confirming suitability for long-duration, low-quiescent-current applications where the SMB10J33A-E3/52 is continuously biased.
SMB10J33A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 18.8A
- Power - Peak Pulse:
- 1000W (1kW)
- 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-214AA (SMB)
SMB10J33A-E3/52 FAQ
1.How can I place an order for SMB10J33A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J33A-E3/52 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 SMB10J33A-E3/52 reliable?
The price and inventory of SMB10J33A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J33A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB10J33A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J33A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J33A-E3/52?
SMB10J33A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J33A-E3/52 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 SMB10J33A-E3/52?
For technical support, including SMB10J33A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J33A-E3/52 requirements.
6.How does Aetrix verify that SMB10J33A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB10J33A-E3/52 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 SMB10J33A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB10J33A-E3/52?
All SMB10J33A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J33A-E3/52, 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 SMB10J33A-E3/52 part is unused and in its original packaging.
Return procedure for SMB10J33A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J33A-E3/52 Tags
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