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Vishay General Semiconductor - Diodes Division SMB10J28AHE3/52
- Part No.:
- SMB10J28AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J28AHE3/52.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB10J28AHE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on 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 clamping voltage (VC) at 22.0 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 power supply input stages.
For engineers reviewing the SMB10J28AHE3/52 datasheet, SMB10J28AHE3/52 pinout, SMB10J28AHE3/52 application, or SMB10J28AHE3/52 equivalent, key selection criteria include clamping performance under 22 A surge, AEC-Q101 qualification for automotive use, unidirectional polarity with cathode band marking, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a shunt-clamping device that remains high-impedance below VWM (28 V) and rapidly transitions to low-impedance conduction above VBR (min. 31.1 V) to limit transient overvoltages. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and robust surge handling up to 100 A IFSM (8.3 ms half-sine).
Thermal design relies on RθJL = 20 °C/W (junction-to-lead) and RθJA = 72 °C/W (junction-to-ambient on recommended pad layout), enabling reliable operation from –55 °C to +150 °C junction temperature. The device meets MSL Level 1 and is qualified to AEC-Q101 for automotive underhood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin for 24 V systems. |
| VBR (min/max) | 31.1 V / 34.4 V at IT = 1 mA - tight breakdown tolerance ensures predictable turn-on during transients. |
| VC @ IPPM | 45.4 V at 22.0 A (10/1000 µs) - clamping voltage directly limits downstream IC stress during ISO 7637-2 Pulse 1/2a/5a events. |
| PPPM | 1000 W - peak surge power rating determines survivability against high-energy load-dump or inductive switch-off spikes. |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage preserves battery life and avoids false triggering in low-power sensor circuits. |
| TJ max. | +150 °C - enables placement near hot components (e.g., power MOSFETs, DC/DC converters) without derating. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads; cathode indicated by color band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; forms shunt path during overvoltage event. |
| Cathode | High-side transient clamp node | Connected to protected line (e.g., 24 V supply rail); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables asymmetric protection on positive-rail-only systems without forward-conduction interference during normal operation. |
| AEC-Q101 qualification | Validates long-term reliability in automotive environments including thermal shock, humidity, and vibration stress profiles. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients (e.g., EFT bursts), improving protection margin for sensitive CAN/LIN transceivers. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without popcorn cracking or delamination - compatible with standard SMT assembly lines. |
| Glass-passivated junction | Ensures stable electrical parameters over time and temperature, critical for field-deployed industrial control modules. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs of body control modules (BCM) against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Shunt-clamp TVS placed upstream of DC/DC converter input to absorb >1000 W surges within nanoseconds. Use Value: Limits transient voltage to ≤45.4 V, preventing damage to downstream PMICs and microcontrollers rated for 36 V absolute max. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; this unidirectional part protects only positive excursions on grounded-signal configurations. Use Value: Sub-1 µA leakage at 28 V avoids measurement error in precision current-loop receivers, while 22 A IPPM handles relay-coil flyback energy. |
| Telecom Power Input Stage | OBD-II Diagnostic Port Protection |
Use Scenario: Guarding primary DC input (–48 V or +24 V) of telecom base station remote radio units (RRUs) against lightning-induced surges. IC Role / Device Role / Timing Role: First-line transient suppressor in series with fuse and MOV, clamping before secondary protection activates. Use Value: 1000 W PPPM rating sustains multiple 10/1000 µs surges without degradation, meeting IEC 61000-4-5 Level 4 requirements. |
Use Scenario: Securing CAN_H/CAN_L lines and VBAT input of vehicle OBD-II adapters connected to diagnostic tools. IC Role / Device Role / Timing Role: Unidirectional TVS on VBAT rail (24 V nominal) to suppress jump-start transients and battery reversal spikes. Use Value: AEC-Q101 qualification ensures compliance with SAE J1113-11 EMC immunity testing; cathode-band marking simplifies automated optical inspection (AOI). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28AHE3/52 | Same VWM (28 V), VBR (31.1–34.4 V), VC (45.4 V), but lower PPPM (600 W vs. 1000 W) and IPPM (13.2 A vs. 22.0 A). | Not suitable for high-energy load-dump scenarios; limited to lower-tier surge immunity (IEC 61000-4-5 Level 2). | Select SMBJ28AHE3/52 only if system-level testing confirms 600 W surge capability is sufficient and board space allows larger footprint alternatives. |
| SMCJ28AHE3/52 | Same electrical specs but in larger SMC (DO-214AB) package; higher thermal mass yields RθJA = 35 °C/W vs. 72 °C/W. | Better sustained power dissipation but requires 30% more PCB area; incompatible with dense automotive module layouts. | Choose SMCJ28AHE3/52 when thermal management dominates over space constraints - e.g., in open-frame industrial power supplies. |
Compared with SMBJ28AHE3/52 and SMCJ28AHE3/52, SMB10J28AHE3/52 delivers optimal balance of 1000 W surge capacity, AEC-Q101 compliance, and SMB footprint - making it the preferred choice for space-constrained, high-reliability 24 V automotive and industrial power rail protection.
Availability
SMB10J28AHE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor signal conditioning, and telecom power input protection requiring stable component supply across multi-year production cycles.
Supply support for SMB10J28AHE3/52 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 application-specific optimization.
The SMB10JxxAHE3 series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB10J28AHE3/52 at its rated peak pulse current?
The SMB10J28AHE3/52 has a maximum clamping voltage (VC) of 45.4 V when subjected to its specified peak pulse current (IPPM) of 22.0 A with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. Maintaining VC below downstream IC absolute maximum ratings is essential for robust system-level protection - the SMB10J28AHE3/52 achieves this while delivering 1000 W peak power handling.
Is SMB10J28AHE3/52 suitable for automotive applications?
Yes, SMB10J28AHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix, indicating RoHS-compliant construction and full qualification to the AEC stress test standard. It supports operation from –55 °C to +150 °C, withstands mechanical shock and thermal cycling per automotive requirements, and is commonly deployed in engine control units, body electronics, and infotainment power rails. The SMB10J28AHE3/52 meets ISO 7637-2 Pulse 1, 2a, and 5a immunity thresholds when applied with appropriate PCB layout and grounding.
How does the SMB10J28AHE3/52 differ from bidirectional TVS diodes like SMB8J28CAHE3/52?
The SMB10J28AHE3/52 is unidirectional and functions only during positive transients on its cathode terminal, whereas SMB8J28CAHE3/52 is bidirectional and clamps both polarities symmetrically. This makes SMB10J28AHE3/52 ideal for single-polarity DC rails (e.g., 24 V supply), offering lower leakage (<1.0 µA vs. ~1.0 µA per polarity) and higher unidirectional PPPM (1000 W vs. 800 W). The SMB10J28AHE3/52 also features a visible cathode band for polarity identification - critical for automated assembly and field service verification.
What is the thermal resistance profile of SMB10J28AHE3/52, and how does it affect PCB layout?
The SMB10J28AHE3/52 has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and junction-to-ambient (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under worst-case 1000 W surge, designers must ensure adequate copper pour and minimize trace length between anode/cathode pads and ground/power planes. The SMB10J28AHE3/52's low RθJL enables efficient heat transfer into the PCB, reducing reliance on external heatsinking - a key advantage in compact automotive modules where airflow is restricted.
Can SMB10J28AHE3/52 be used in parallel for higher surge current handling?
No - SMB10J28AHE3/52 is not recommended for parallel operation due to parameter variation (e.g., VBR tolerance ±5%) causing current imbalance and potential thermal runaway. Vishay specifies single-device operation only; higher surge capacity should be achieved using a single higher-rated device (e.g., SMCJ28AHE3/52) or staged protection (TVS + MOV + fuse). Parallel use of SMB10J28AHE3/52 risks premature failure of one unit under transient stress, compromising overall system protection - always validate layout and coordination with Vishay's application notes before modifying protection topology.
SMB10J28AHE3/52 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:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 22A
- Power - Peak Pulse:
- 1000W (1kW)
- 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 (SMB)
SMB10J28AHE3/52 FAQ
1.How can I place an order for SMB10J28AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J28AHE3/52 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 SMB10J28AHE3/52 reliable?
The price and inventory of SMB10J28AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J28AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB10J28AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J28AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J28AHE3/52?
SMB10J28AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J28AHE3/52 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 SMB10J28AHE3/52?
For technical support, including SMB10J28AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J28AHE3/52 requirements.
6.How does Aetrix verify that SMB10J28AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB10J28AHE3/52 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 SMB10J28AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB10J28AHE3/52?
All SMB10J28AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J28AHE3/52, 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 SMB10J28AHE3/52 part is unused and in its original packaging.
Return procedure for SMB10J28AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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