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Vishay General Semiconductor - Diodes Division SMBJ28AHE3/52
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- Part No.:
- SMBJ28AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28AHE3/52.pdf
- Description:
- TVS DIODE 28VWM 45.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,091
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Product details
Overview
SMBJ28AHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 45.4 V maximum clamping voltage (VC) at 13.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ28AHE3/52 datasheet, SMBJ28AHE3/52 pinout, SMBJ28AHE3/52 application, or SMBJ28AHE3/52 equivalent, this part is evaluated for ESD/surge immunity in 24 V DC systems, PCB-level lightning transient suppression per IEC 61000-4-5, and AEC-Q101-compliant automotive subsystem protection where low-leakage (<1 µA at 28 V), fast response (<1 ns), and stable thermal performance up to +150 °C junction temperature are required.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (>1 MΩ at VWM), then rapidly avalanches when transient voltage exceeds VBR, limiting downstream voltage to ≤45.4 V at 13.2 A. Its glass-passivated junction ensures stable leakage and repeatable breakdown behavior across temperature.
The SMBJ28AHE3/52 is AEC-Q101 qualified and RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and meets MSL Level 1 (peak reflow 260 °C). Its thermal resistance is 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads, enabling reliable operation in compact industrial PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28 V - Maximum continuous reverse operating voltage before significant conduction begins; defines safe DC rail margin for 24 V systems. |
| VBR (Breakdown Voltage) | 31.1–34.4 V at 1 mA - Tight tolerance ensures predictable turn-on during transients; measured per ANSI/IEEE C62.35. |
| VC (Clamping Voltage) | 45.4 V at 13.2 A (10/1000 µs) - Limits protected circuit voltage during surge; enables compatibility with 3.3 V/5 V logic I/O and 24 V power stages. |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy surges (e.g., IEC 61000-4-5 Level 3: 1 kV/42 Ω) without degradation when mounted per recommended pad layout. |
| IPPM (Peak Pulse Current) | 13.2 A - Peak current capability at rated clamping voltage; supports repetitive surge duty cycle ≤0.01 %. |
| TJmax | +150 °C - Enables use in under-hood automotive modules and industrial enclosures with elevated ambient temperatures. |
| Leakage (ID) | ≤1.0 µA at 28 V - Minimizes standby power loss and avoids false triggering in high-impedance sensor bias networks. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated for lead-free soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to system ground or low-side reference; completes clamping loop during transient events. |
| Cathode | Protected line connection / Surge sink | Connected to line being protected (e.g., 24 V rail or sensor input); avalanche conduction occurs from cathode to anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive subsystems including body control modules and ADAS sensor interfaces requiring long-term reliability under thermal cycling and humidity. |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combination wave surges up to 1 kV open-circuit / 0.5 A short-circuit without parametric shift or failure. |
| Low incremental surge resistance | Enables tight clamping (VC/IPPM = 3.43 Ω) - reduces voltage overshoot during fast-rising transients compared to higher-Rdyn alternatives. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and single-reflow processing at 260 °C peak, eliminating bake requirements and supporting high-yield automated assembly. |
| Glass passivated junction | Provides stable VBR tolerance and <1 µA leakage at VWM across -55 °C to +150 °C, critical for precision analog front-ends. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24 V DC power inputs against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VIN and GND, clamping transients within 1 ns to prevent latch-up in PMICs and gate drivers. Use Value: Clamps 13.2 A surges to ≤45.4 V, maintaining supply integrity for 24 V-rated controllers while surviving >10,000 cycles per JEDEC JESD22-A114. |
Use Scenario: Input protection for LIN bus transceivers and door module microcontrollers exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V/24 V battery rail, absorbing ISO 7637-2 Pulse 1 (−150 V/0.2 Ω) and Pulse 5a (75 V/10 Ω) energy. Use Value: AEC-Q101 qualification and 150 °C TJmax ensure operation in engine bay environments; <1 µA leakage avoids battery drain in always-on nodes. |
| Factory Automation Sensors | Telecom Power Feeds |
Use Scenario: Reverse-polarity and surge protection for 4–20 mA current-loop transmitters connected to PLC analog inputs. IC Role / Device Role / Timing Role: Unidirectional TVS in series with input protection network, blocking negative transients while allowing forward bias for diagnostic signaling. Use Value: 28 V VWM accommodates 24 V loop supply headroom; 45.4 V VC stays below typical ADC input absolute max ratings (±36 V). |
Use Scenario: Secondary-side transient suppression on -48 V DC telecom power distribution boards feeding baseband processors. IC Role / Device Role / Timing Role: Cathode-to-rail configuration clamps positive-going surges induced by hot-swap events or cable ESD coupling. Use Value: 600 W rating handles multiple 10/1000 µs surges per GR-1089-CORE; DO-214AA footprint allows dense placement near connectors without thermal crowding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A-E3/52 | Commercial-grade (non-AEC-Q101), identical electrical specs and SMB package. | Lacks automotive qualification; suitable for industrial/commercial designs without automotive compliance mandates. | Select when AEC-Q101 is not required and cost optimization is prioritized. |
| SMCJ28AHE3/52 | Same VWM/VC but in larger SMC (DO-214AB) package; 1500 W PPPM, 21.2 A IPPM. | Higher surge capacity and lower thermal resistance (RθJA = 50 °C/W), but requires 30 % more board area. | Select when system-level surge testing exceeds 600 W or thermal constraints demand lower junction rise. |
Compared with SMBJ28A-E3/52, the SMBJ28AHE3/52 adds AEC-Q101 qualification and extended reliability testing, while the SMCJ28AHE3/52 trades footprint efficiency for higher surge endurance - making SMBJ28AHE3/52 optimal for space-constrained automotive and industrial 24 V nodes needing certified robustness.
Availability
SMBJ28AHE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and factory automation sensors requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ28AHE3/52 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, and protection devices with emphasis on reliability, precision, and application-specific validation.
The SMBJ series was developed for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 compliance are mandatory design requirements.
FAQ
What is the clamping voltage of SMBJ28AHE3/52 at its rated peak pulse current?
The SMBJ28AHE3/52 has a maximum clamping voltage (VC) of 45.4 V at 13.2 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and reflects the actual voltage seen by downstream circuitry during surge events - critical for ensuring protected ICs remain within their absolute maximum ratings.
Is SMBJ28AHE3/52 suitable for automotive applications?
Yes, SMBJ28AHE3/52 is AEC-Q101 qualified and specifically designed for automotive subsystems such as body control modules and sensor interfaces. Its qualification includes stress testing for temperature cycling, humidity bias, and mechanical shock - confirming reliability in under-hood and cabin environments where SMBJ28AHE3/52 operates continuously up to +150 °C junction temperature.
How does the SMBJ28AHE3/52 differ from the non-HE3 version?
The SMBJ28AHE3/52 differs from commercial variants like SMBJ28A-E3/52 primarily in its AEC-Q101 qualification, extended reliability screening, and halogen-free RoHS compliance. Electrically and physically identical, SMBJ28AHE3/52 undergoes additional automotive-grade testing - making it the only version approved for safety-critical automotive nodes where SMBJ28AHE3/52 must meet zero-defect field performance targets.
What is the maximum leakage current of SMBJ28AHE3/52 at its stand-off voltage?
The SMBJ28AHE3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 28 V stand-off voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage preserves battery life in always-on automotive modules and prevents loading errors in high-impedance sensor bias networks - a key differentiator versus generic TVS diodes with >5 µA leakage at rated VWM.
Can SMBJ28AHE3/52 be used in bidirectional configurations?
No, SMBJ28AHE3/52 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SMBJ28CA variant - which provides symmetrical clamping in both polarities but shares the same 28 V VWM and 600 W PPPM. Using SMBJ28AHE3/52 in reverse-biased mode risks permanent damage due to lack of reverse breakdown specification.
SMBJ28AHE3/52 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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.5V
- Current - Peak Pulse (10/1000µs):
- 13.2A
- 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)
SMBJ28AHE3/52 FAQ
1.How can I place an order for SMBJ28AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28AHE3/52 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 SMBJ28AHE3/52 reliable?
The price and inventory of SMBJ28AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ28AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ28AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28AHE3/52?
SMBJ28AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28AHE3/52 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 SMBJ28AHE3/52?
For technical support, including SMBJ28AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28AHE3/52 requirements.
6.How does Aetrix verify that SMBJ28AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ28AHE3/52 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 SMBJ28AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ28AHE3/52?
All SMBJ28AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28AHE3/52, 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 SMBJ28AHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ28AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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