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Vishay General Semiconductor - Diodes Division SMBJ9.0AHE3/52
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- Part No.:
- SMBJ9.0AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9.0AHE3/52.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,274
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Product details
Overview
SMBJ9.0AHE3/52 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 9.0 V stand-off voltage (VWM), 10.0–11.1 V breakdown voltage (VBR) at 1 mA, and clamps transients to ≤15.4 V at 39.0 A peak pulse current (IPPM) under 10/1000 µs waveform - deployed in power supply rails, I/O lines, and sensor interfaces across industrial and automotive systems.
For engineers reviewing the SMBJ9.0AHE3/52 datasheet, SMBJ9.0AHE3/52 pinout, SMBJ9.0AHE3/52 application, or SMBJ9.0AHE3/52 equivalent, key selection criteria include its AEC-Q101 qualification, 600 W peak pulse power rating, low 0.074 %/°C VBR temperature coefficient, and compatibility with automated SMT assembly on SMB (DO-214AA) footprint.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping device in reverse-biased configuration, activating when transient voltage exceeds its VWM (9.0 V) and entering avalanche breakdown above VBR (min. 10.0 V). Its glass-passivated junction ensures stable leakage performance (<10 µA at VWM) and fast response time (<1.0 ns).
Thermally, it supports operation from –55 °C to +150 °C with RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and handles 100 A non-repetitive forward surge (8.3 ms half-sine), making it suitable for high-energy transient suppression without thermal runaway under defined PCB layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (min/max) | 10.0 V / 11.1 V at IT = 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | ≤15.4 V at 39.0 A (10/1000 µs) - Clamped voltage seen by protected circuit; determines maximum stress on downstream components. |
| PPPM | 600 W - Peak transient energy absorption capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) when properly laid out. |
| IFSM | 100 A (8.3 ms half-sine) - Surge current handling in forward conduction; critical for accidental polarity reversal or AC-coupled fault scenarios. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with J-STD-020 MSL level 1 reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band marking on body; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry / low-side reference | Connected to ground or lower-potential rail; forms return path during clamping. |
| Cathode (banded end) | Reverse-biased input / protected line connection | Connected to signal/power line requiring protection; avalanche conduction occurs here during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; supports under-hood and ADAS module deployment. |
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against severe transients per ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surge standards. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<10 µA at VWM) over lifetime and temperature extremes. |
| Low clamping ratio (VC/VBR ≈ 1.54) | Minimizes voltage overshoot during clamping; preserves noise margin for 3.3 V/5 V logic and analog front-ends. |
| MSL Level 1 (260 °C peak) | Permits standard lead-free reflow without moisture sensitivity concerns; eliminates bake requirements pre-assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and regulator input to clamp spikes up to ±35 V. Use Value: Prevents damage to LDOs and microcontrollers during ISO 7637-2 Pulse 5a (35 V/500 ms); validated per AEC-Q101. |
Use Scenario: Shielding 4–20 mA current-loop sensors and RS-485 transceivers from ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: Standoff-connected TVS on signal line to ground, activated only during >9.0 V excursions. Use Value: Limits induced voltage to ≤15.4 V during 8 kV contact ESD (IEC 61000-4-2), preserving signal integrity and ADC accuracy. |
| Consumer Power Adapter Input Protection | Telecom DSL Line Transient Suppression |
|
Use Scenario: Safeguarding AC-DC adapter primary-side rectifiers and controllers from lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Mounted across bridge rectifier output to absorb differential-mode transients before bulk capacitor. Use Value: Handles 600 W peak pulses without degradation; complements MOVs by providing faster response (<1 ns) and tighter clamping. |
Use Scenario: Protecting DSL line drivers and receivers from longitudinal surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to common-mode ground. Use Value: Maintains <10 µA leakage at 9.0 V to avoid disrupting low-current line monitoring; withstands repeated 10/1000 µs surges per GR-1089-CORE. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A-E3/52 | Commercial-grade version; same electrical specs but not AEC-Q101 qualified; RoHS-compliant, no halogen restriction. | Lacks automotive qualification; suitable for consumer/industrial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and full qualification documentation is unnecessary. |
| SMBJ9.0CAHE3/52 | Bidirectional variant; symmetric VBR (10.0–11.1 V) in both directions; identical VC, PPPM, and package. | Required for AC-coupled or floating signal lines (e.g., Ethernet PHY, audio jacks) where polarity reversal may occur. | Choose for bidirectional protection needs; note that unidirectional SMBJ9.0AHE3/52 cannot substitute without circuit redesign. |
Compared with SMBJ9.0A-E3/52, the SMBJ9.0AHE3/52 adds AEC-Q101 validation for automotive use, while SMBJ9.0CAHE3/52 provides symmetrical clamping essential for AC signals - neither is pin-compatible with the other due to polarity and qualification differences.
Availability
SMBJ9.0AHE3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom line cards, and consumer power adapters requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMBJ9.0AHE3/52 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 and qualification compliance are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ9.0AHE3/52 under standard test conditions?
The SMBJ9.0AHE3/52 exhibits a maximum clamping voltage (VC) of 15.4 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 39.0 A. This value is measured per IEC 61000-4-5 methodology and reflects worst-case voltage stress imposed on protected circuitry during surge events. The SMBJ9.0AHE3/52 maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C) with minimal drift due to its 0.074 %/°C VBR coefficient.
Is SMBJ9.0AHE3/52 suitable for automotive applications?
Yes, SMBJ9.0AHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use, with suffix "HE3" indicating RoHS-compliant and AEC-Q101-qualified construction. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification per JESD22-A114. The SMBJ9.0AHE3/52 is deployed in engine control units, infotainment power supplies, and ADAS camera modules where sustained reliability under thermal and electrical stress is required.
How does the SMBJ9.0AHE3/52 differ from the SMBJ9.0A-E3/52?
The SMBJ9.0AHE3/52 and SMBJ9.0A-E3/52 share identical electrical characteristics (VWM, VBR, VC, PPPM) and SMB (DO-214AA) package, but differ in qualification: SMBJ9.0AHE3/52 is AEC-Q101 qualified and intended for automotive applications, whereas SMBJ9.0A-E3/52 is commercial-grade only. Both are RoHS-compliant, but only the HE3 variant carries full automotive reliability documentation. The SMBJ9.0AHE3/52 is not a drop-in replacement for E3 in non-automotive designs unless qualification compliance is required.
What is the thermal resistance and recommended PCB layout for SMBJ9.0AHE3/52?
The SMBJ9.0AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. To achieve rated power dissipation and avoid thermal derating, designers must implement minimum pad dimensions and ensure adequate copper area. The SMBJ9.0AHE3/52 also features RθJL = 20 °C/W (junction-to-lead), supporting efficient heat transfer through solder joints into the PCB plane.
Can SMBJ9.0AHE3/52 be used in bidirectional signal protection?
No, SMBJ9.0AHE3/52 is a unidirectional TVS diode and must be used with correct polarity - cathode connected to the protected line, anode to ground. For bidirectional signal lines (e.g., USB D+/D–, RS-485 A/B, audio), the bidirectional variant SMBJ9.0CAHE3/52 is required. Using SMBJ9.0AHE3/52 on AC-coupled or polarity-agnostic paths risks forward conduction during negative transients and failure to clamp in one direction, compromising protection integrity.
SMBJ9.0AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 39A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ9.0AHE3/52 FAQ
1.How can I place an order for SMBJ9.0AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9.0AHE3/52 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 SMBJ9.0AHE3/52 reliable?
The price and inventory of SMBJ9.0AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ9.0AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ9.0AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9.0AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9.0AHE3/52?
SMBJ9.0AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9.0AHE3/52 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 SMBJ9.0AHE3/52?
For technical support, including SMBJ9.0AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9.0AHE3/52 requirements.
6.How does Aetrix verify that SMBJ9.0AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ9.0AHE3/52 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 SMBJ9.0AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ9.0AHE3/52?
All SMBJ9.0AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9.0AHE3/52, 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 SMBJ9.0AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ9.0AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ9.0AHE3/52 Tags
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