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Vishay General Semiconductor - Diodes Division SMBJ36A-E3/5B
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- Part No.:
- SMBJ36A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ36A-E3/5B.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,514
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Product details
Overview
SMBJ36A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection of DC power rails and signal lines. It features a 36 V standoff voltage (VWM), 40.0–44.2 V breakdown voltage (VBR) at 1.0 mA, clamps transients to ≤58.1 V at 10.3 A peak pulse current (IPPM), and delivers 600 W peak pulse power (10/1000 µs waveform) in the SMB (DO-214AA) package - widely used in industrial motor drives and automotive body control modules.
For engineers reviewing the SMBJ36A-E3/5B datasheet, SMBJ36A-E3/5B pinout, SMBJ36A-E3/5B application, or SMBJ36A-E3/5B equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, thermal derating above 25 °C ambient, IPPM capability under system-level surge test profiles (e.g., ISO 7637-2 Pulse 1/2a/3a), and RoHS-compliant matte tin lead finish compatible with J-STD-002 solderability requirements.
Technical Context
This TVS operates as a unidirectional avalanche diode, conducting only in reverse bias when transient voltage exceeds VBR. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM = 36 V), while the low incremental surge resistance enables tight clamping during fast-rising transients (response time <1.0 ns).
The device is rated for TJ = –55 °C to +150 °C operation, with thermal resistance RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W. It meets MSL Level 1 per J-STD-020 and supports reflow up to 260 °C peak, making it suitable for high-reliability automated SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before significant conduction begins; sets upper limit for protected circuit's normal operating rail. |
| VBR (min/max) | 40.0 V / 44.2 V at IT = 1.0 mA - Confirmed breakdown range defining turn-on threshold; ensures reliable triggering above system overvoltage tolerance. |
| VC @ IPPM | ≤58.1 V at 10.3 A - Clamped voltage during 10/1000 µs surge; must remain below downstream IC's absolute maximum input rating. |
| PPPM | 600 W - Peak pulse power handling per single 10/1000 µs transient; defines energy absorption capacity without failure. |
| IPPM | 10.3 A - Corresponding peak surge current at VC; used to size PCB trace width and verify layout survivability. |
| TJ max. | +150 °C - Maximum junction temperature; constrains power dissipation and ambient operating envelope in enclosed enclosures. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with cathode band marking; footprint matches JEDEC DO-214AA mechanical dimensions. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, compliant with UL 94 V-0 flammability rating. Cathode identified by a band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (low-side connection) | Connected to ground or lower-potential node; carries surge current to reference plane during clamping. |
| Cathode | Reverse-biased terminal (high-side connection) | Connected to protected line (e.g., 36 V rail); avalanche conduction initiates here when VIN > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against severe load-dump and inductive switching surges common in 24 V automotive and industrial systems. |
| Clamping voltage ≤58.1 V at 10.3 A | Provides ≥10 V margin below typical 65 V absolute max rating of 36 V-rated MOSFETs and microcontrollers. |
| Low leakage <1.0 µA at 36 V | Minimizes standby power loss and avoids false triggering in low-current sensor or battery-backed circuits. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT processes without baking or special handling, reducing manufacturing cost and risk. |
| AEC-Q101 qualified variant available | HE3/HM3 suffix versions meet automotive reliability standards for under-hood and body electronics applications. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and MCU I/O pins against back-EMF spikes from brushed DC motors and solenoids. IC Role / Device Role / Timing Role: Unidirectional TVS placed between motor supply rail and ground, clamping transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to 36 V-rated gate drivers (e.g., TI UCC27531) during 100 V/50 A inductive kick events. |
Use Scenario: Safeguarding LIN bus transceivers and door module MCUs from battery line transients (ISO 7637-2 Pulse 1, 2a). IC Role / Device Role / Timing Role: Standoff-connected TVS on 12 V/24 V supply input, absorbing repetitive 10/1000 µs pulses up to 600 W. Use Value: Maintains system uptime by limiting voltage to ≤58.1 V during 100 V/10 A pulses, well below 65 V ABS MAX of NXP S912ZVL64. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection for 36 V DC-DC converters in PoE-powered network equipment. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side output rail, coordinated with upstream MOV and fuse. Use Value: Absorbs 600 W surge energy without degradation, ensuring compliance with IEC 61000-4-5 Level 3 (2 kV line-earth). |
Use Scenario: Surge suppression on mainboard 36 V auxiliary rails powering display backlight inverters and fan controllers. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS placed directly at connector entry point to minimize PCB trace inductance. Use Value: Eliminates field failures caused by ESD and lightning-induced surges on AC mains-coupled 36 V supplies. |
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-E3/5B | Bidirectional version; symmetric VBR = 40.0–44.2 V in both polarities; same VC, PPPM, and package. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN FD); not suitable for DC rail protection where polarity is fixed. | Select SMBJ36CA-E3/5B only when protecting bidirectional signals or floating rails; unidirectional SMBJ36A-E3/5B offers lower leakage in DC applications. |
| SMCJ36A-E3/57T | Higher-power SMC (DO-214AB) package; same VWM/VBR but 1500 W PPPM and 24.9 A IPPM at 72.7 V VC. | Used where higher surge energy (e.g., ISO 16750-2 Load Dump) or longer duration transients exceed SMBJ36A-E3/5B capability. | Choose SMCJ36A-E3/57T when system-level testing requires >600 W margin or when thermal constraints allow larger footprint; SMBJ36A-E3/5B optimizes space-constrained layouts. |
Compared with SMBJ36CA-E3/5B, the SMBJ36A-E3/5B provides lower reverse leakage for DC rail protection, while versus SMCJ36A-E3/57T, it trades peak power headroom for 40 % smaller PCB area and tighter clamping voltage - critical in space-limited consumer and telecom designs.
Availability
SMBJ36A-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, full RoHS compliance, and consistent tape-and-reel delivery for SMT production.
Supply support for SMBJ36A-E3/5B 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, efficiency, and manufacturability.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, repeatable clamping, and AEC-Q101 qualification are essential.
FAQ
What is the maximum clamping voltage of SMBJ36A-E3/5B at its rated peak pulse current?
The SMBJ36A-E3/5B has a maximum clamping voltage (VC) of 58.1 V when subjected to its rated peak pulse current (IPPM) of 10.3 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream components experience no more than 58.1 V during surge events, provided PCB layout minimizes parasitic inductance. The SMBJ36A-E3/5B datasheet specifies this parameter in Table 1 on page 2.
Is SMBJ36A-E3/5B RoHS-compliant and lead-free?
Yes, SMBJ36A-E3/5B is RoHS-compliant and lead-free, as indicated by the "E3" suffix per Vishay's ordering nomenclature. It uses matte tin-plated leads and meets J-STD-002 solderability requirements. The molding compound is UL 94 V-0 rated, and the device complies with JEDEC JESD201 Class 2 whisker resistance. No exemptions or lead-containing materials are used in the SMBJ36A-E3/5B construction.
What is the standoff voltage (VWM) and why is it critical for SMBJ36A-E3/5B selection?
The standoff voltage (VWM) of SMBJ36A-E3/5B is 36 V - the maximum DC or continuous reverse voltage the device can block without entering avalanche conduction. Selecting a VWM ≥110 % of the protected circuit's nominal operating voltage prevents nuisance conduction during normal operation. For a 33 V rail, SMBJ36A-E3/5B provides appropriate margin; using a lower-VWM part like SMBJ33A-E3/5B would risk thermal runaway. This specification is confirmed in the Electrical Characteristics table for SMBJ36A-E3/5B.
Can SMBJ36A-E3/5B be used in automotive applications?
SMBJ36A-E3/5B itself is commercial-grade, but Vishay offers AEC-Q101 qualified variants under the HE3 and HM3 suffixes (e.g., SMBJ36AHE3_B/I). These versions undergo stress testing per AEC-Q101 Rev D and are approved for automotive under-hood and body electronics. The base SMBJ36A-E3/5B is suitable for non-safety-critical automotive subsystems where qualification is not mandated, but design validation per ISO 7637-2 remains required. Always verify qualification status via the full part number.
What is the thermal resistance and how does it affect SMBJ36A-E3/5B performance in high-temperature environments?
SMBJ36A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per JEDEC standards. At 50 °C ambient, its power dissipation derates to 5.0 W - meaning sustained surge repetition must stay below this average to avoid exceeding TJ = 150 °C. Layout improvements (e.g., thermal vias, larger copper areas) reduce RθJA and extend safe operating time. This thermal behavior is documented in the Thermal Characteristics section of the SMBJ36A-E3/5B datasheet.
SMBJ36A-E3/5B 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-E3/5B FAQ
1.How can I place an order for SMBJ36A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ36A-E3/5B 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-E3/5B reliable?
The price and inventory of SMBJ36A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ36A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ36A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ36A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ36A-E3/5B?
SMBJ36A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ36A-E3/5B 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-E3/5B?
For technical support, including SMBJ36A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ36A-E3/5B requirements.
6.How does Aetrix verify that SMBJ36A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ36A-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ36A-E3/5B?
All SMBJ36A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ36A-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ36A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ36A-E3/5B Tags
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