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Vishay General Semiconductor - Diodes Division SMBJ36A-E3/52
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- Part No.:
- SMBJ36A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ36A-E3/52.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,997
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Product details
Overview
SMBJ36A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 36 V standoff voltage (VWM), 40.0–44.2 V breakdown range at 1 mA, clamps transients to ≤58.1 V at 10.3 A (10/1000 μs waveform), and delivers 600 W peak pulse power - deployed in DC power rails and signal lines of industrial sensor interfaces and automotive control modules.
For engineers reviewing the SMBJ36A-E3/52 datasheet, SMBJ36A-E3/52 pinout, SMBJ36A-E3/52 application, or SMBJ36A-E3/52 equivalent, key selection criteria include its unidirectional polarity, SMB (DO-214AA) package thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification eligibility (via HE3 suffix), and compliance with UL 497B for surge protector classification.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when reverse voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the 10/1000 μs surge rating reflects standardized lightning and inductive-switching transient immunity per ANSI/IEEE C62.35.
The SMBJ36A-E3/52 exhibits a temperature coefficient of VBR of +0.100 %/°C and a maximum forward voltage of 3.5 V at 50 A, confirming suitability for high-current surge suppression without forward conduction interference in DC-biased paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before clamping initiates; sets upper limit for normal circuit operation. |
| VBR @ IT = 1 mA | 40.0–44.2 V - Verified breakdown threshold defining reliable avalanche onset; ensures predictable clamping margin above VWM. |
| VC @ IPPM = 10.3 A | ≤58.1 V - Clamped voltage during 600 W transient; determines maximum stress imposed on downstream ICs or MOSFETs. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; validates capability against IEC 61000-4-5 Level 4 surges. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports protection of rectifier stages or DC inputs. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating requirements above 25 °C ambient. |
| Junction Temp Range | −55 °C to +150 °C - Operational and storage temperature envelope; enables use in under-hood automotive and industrial environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating and MSL level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode | Reference/return path | Typically tied to system ground or lower-potential rail; completes clamping current path during surge. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive equipment. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection fidelity for high-speed interfaces. |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage performance across temperature and lifetime, critical for safety-critical systems. |
| AEC-Q101 qualification option (HE3 suffix) | Validates reliability for automotive applications including engine control units and ADAS sensor power supplies. |
| RoHS-compliant, halogen-free variants available | Supports environmental compliance programs (e.g., EU RoHS, JEDEC JS709) without compromising electrical performance. |
Applications
| Industrial Sensor Power Protection | Automotive Body Control Module (BCM) Inputs |
|---|---|
|
Use Scenario: Protecting 24 V DC supply lines feeding analog sensor front-ends (e.g., pressure, temperature) in factory automation PLCs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp load-dump and inductive kickback transients. Use Value: Limits voltage seen by LDO regulators and ADCs to ≤58.1 V, preventing latch-up or permanent damage during 600 W surges. |
Use Scenario: Safeguarding LIN bus input pins and microcontroller GPIOs exposed to battery line transients in vehicle door modules. IC Role / Device Role / Timing Role: Standoff-rated TVS suppressing ISO 7637-2 Pulse 1/2a/5a events on 12 V auxiliary rails. Use Value: Maintains functional integrity of MCU peripherals by clamping spikes within 1 ns while drawing <1.0 μA leakage at 36 V. |
| DC Motor Drive Gate Driver Supply | Telecom PoE Power Sourcing Equipment (PSE) |
|
Use Scenario: Shielding isolated gate driver ICs (e.g., Si823x) from flyback voltage spikes generated by brushed DC motor commutation. IC Role / Device Role / Timing Role: Fast-response TVS shunting inductive energy away from high-side driver VDD pins. Use Value: Prevents gate oxide breakdown by limiting transient excursions to ≤58.1 V despite 100 A surge capability and 3.5 V forward drop. |
Use Scenario: Protecting primary-side controller ICs and MOSFETs in IEEE 802.3af/at PSE circuits subjected to Ethernet cable ESD and surge coupling. IC Role / Device Role / Timing Role: Primary-side clamping device on 48 V DC output stage prior to transformer isolation. Use Value: Absorbs up to 600 W of coupled lightning energy without degradation, validated per UL 497B protector classification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA-E3/52 | Bidirectional variant; symmetric VBR (40.0–44.2 V) in both polarities; no cathode marking. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN FD) where reverse voltage may occur. | Select SMBJ36CA-E3/52 only when bidirectional clamping is mandated; unidirectional SMBJ36A-E3/52 offers lower leakage in DC-biased rails. |
| SMAJ36A-E3/52 | Lower peak pulse power (400 W vs. 600 W); same VWM/VBR but higher clamping voltage (63.0 V at 6.4 A). | Suitable for cost-sensitive consumer electronics with lower surge immunity requirements (IEC 61000-4-5 Level 2). | Choose SMAJ36A-E3/52 only if 400 W rating suffices; SMBJ36A-E3/52 provides 50 % higher surge margin and tighter clamping for industrial-grade designs. |
Compared with SMBJ36CA-E3/52 and SMAJ36A-E3/52, the SMBJ36A-E3/52 delivers superior single-direction surge handling (600 W), lower clamping voltage (58.1 V), and verified suitability for AEC-Q101-qualified automotive subsystems when ordered with HE3 suffix - making it the preferred choice for high-reliability DC power rail protection.
Availability
SMBJ36A-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, and telecom power supply designs requiring stable component supply, RoHS compliance, and traceable sourcing.
Supply support for SMBJ36A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness against load dump, ESD, and lightning-induced surges is mandatory.
FAQ
What is the maximum clamping voltage of SMBJ36A-E3/52 under rated surge conditions?
The SMBJ36A-E3/52 clamps to a maximum of 58.1 V when subjected to its rated peak pulse current of 10.3 A using the standardized 10/1000 μs waveform. This value is measured at the device terminals under specified test conditions (TA = 25 °C, mounted on 0.2" × 0.2" copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ36A-E3/52 maintains this clamping performance consistently across its operational temperature range.
Is SMBJ36A-E3/52 suitable for automotive applications?
Yes - the base SMBJ36A-E3/52 is RoHS-compliant and commercial-grade, but Vishay offers the AEC-Q101-qualified variant SMBJ36AHE3_X (where "X" denotes revision code) for automotive use. That version undergoes stress testing per AEC-Q101 and is approved for under-hood and chassis-mounted modules. The SMBJ36A-E3/52 itself is commonly used in non-safety-critical automotive subsystems where qualification is not mandated, provided design margins accommodate its commercial-grade reliability profile.
How does the SMBJ36A-E3/52 differ from bidirectional TVS diodes like SMBJ36CA-E3/52?
The SMBJ36A-E3/52 is unidirectional and features a cathode band; it conducts only during reverse overvoltage, behaving like a Zener in avalanche mode. In contrast, SMBJ36CA-E3/52 is bidirectional with symmetrical breakdown in both directions and no polarity marking. The SMBJ36A-E3/52 exhibits lower reverse leakage (<1.0 μA at 36 V) than its bidirectional counterpart, making it preferable for DC power rail protection where forward conduction must be avoided. Both share identical VBR, VC, and PPPM ratings.
What is the thermal resistance and how does it affect SMBJ36A-E3/52 layout?
The SMBJ36A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. This value directly impacts power derating: at 75 °C ambient, its 5.0 W steady-state power dissipation drops to ~2.5 W. To maintain reliability, PCB layout must replicate the specified pad dimensions and avoid thermal bottlenecks - undersized traces or insufficient copper area will raise operating temperature and accelerate parameter drift in the SMBJ36A-E3/52.
Does SMBJ36A-E3/52 meet any safety certifications?
Yes - Vishay certifies both unidirectional and bidirectional SMBJ devices, including SMBJ36A-E3/52, under UL 497B for telecommunications protectors (UL file E136766) and recognizes them for use in classified protector applications. This certification confirms compliance with surge withstand, flammability (UL 94 V-0), and construction requirements for equipment connected to communication lines or low-voltage power circuits. The SMBJ36A-E3/52 also meets MSL level 1 per J-STD-020 for moisture sensitivity.
SMBJ36A-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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ36A-E3/52 FAQ
1.How can I place an order for SMBJ36A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ36A-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 SMBJ36A-E3/52 reliable?
The price and inventory of SMBJ36A-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 SMBJ36A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ36A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ36A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ36A-E3/52?
SMBJ36A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ36A-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 SMBJ36A-E3/52?
For technical support, including SMBJ36A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ36A-E3/52 requirements.
6.How does Aetrix verify that SMBJ36A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ36A-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 SMBJ36A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ36A-E3/52?
All SMBJ36A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ36A-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 SMBJ36A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ36A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ36A-E3/52 Tags
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