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Vishay General Semiconductor - Diodes Division SMA5J28AHE3/61
- Part No.:
- SMA5J28AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J28AHE3/61.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,999
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Product details
Overview
SMA5J28AHE3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on power 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 11.0 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMA5J28AHE3/61 datasheet, SMA5J28AHE3/61 pinout, SMA5J28AHE3/61 application, or SMA5J28AHE3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 µA leakage at 28 V), but triggers into low-impedance conduction when transient voltage exceeds VBR, clamping the line to ≤45.4 V at 11.0 A. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while the SMA package supports thermal dissipation up to 80 °C/W junction-to-ambient.
The device is rated for non-repetitive 10/1000 µs surges up to 500 W and 8.3 ms half-sine forward surge current of 40 A. It meets MSL Level 1 per J-STD-020, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and is qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - guaranteed breakdown range ensures reliable triggering across process and temperature variation. |
| VC @ IPPM | 45.4 V at 11.0 A - clamping voltage limits protected circuit stress during 10/1000 µs transients, critical for 3.3 V/5 V IC survival. |
| PPPM | 500 W - peak pulse power handling capacity with standard 10/1000 µs waveform; enables robust protection against ISO 7637-2 Pulse 1/2a/5a. |
| TJ max | +150 °C - maximum junction temperature allows operation in under-hood automotive environments without derating. |
| Polarity | Unidirectional - cathode marked by band; blocks forward current until VF ≈ 3.5 V at 25 A, suitable for DC supply rail protection. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); cathode indicated by black band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or lower-potential node in unidirectional TVS configuration. | Provides low-impedance path to ground during overvoltage events; requires PCB pad layout per Vishay's 0.2" × 0.2" copper recommendation for thermal performance. |
| Cathode | Current exit terminal in forward bias; marked by band; connected to protected line (e.g., 24 V rail or signal input). | Defines polarity-sensitive placement - reversal causes permanent short under normal operation; essential for correct clamping direction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock - required for engine control, ADAS, and body electronics. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term leakage stability across 1000+ hours at 125 °C, critical for field-deployed industrial systems. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns - eliminates bake requirements and supports high-throughput SMT lines. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD or inductive kick), improving protection margin for sensitive 3.3 V logic. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between 24 V rail and chassis ground, triggered within <1 ns to clamp voltage below 48 V. Use Value: Enables compliance with ISO 16750-2 automotive electrical stress requirements while maintaining system uptime under repeated surge exposure. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers (PLCs) against wiring-induced surges and electrostatic discharge. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at connector interface to divert induced transients before reaching optocoupler or microcontroller input pins. Use Value: Prevents false triggering and latch-up in 24 V discrete input modules, supporting IEC 61000-4-5 Level 3 (2 kV) immunity without external filtering. |
| DC-DC Converter Output Clamping | Sensor Signal Line Protection |
Use Scenario: Clamping output transients on isolated 12 V DC-DC converters powering safety-critical subsystems in factory automation equipment. IC Role / Device Role / Timing Role: Secondary-side TVS placed across converter output to suppress ringing and cross-regulation spikes during load step changes. Use Value: Maintains regulated output integrity during dynamic loading, preventing brownout resets in downstream microcontrollers and FPGAs. |
Use Scenario: Protecting analog outputs (e.g., 4–20 mA current loops) and digital sensor interfaces (CAN, LIN) from cable-coupled lightning surges and ESD. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS installed at sensor harness entry point to shunt energy before reaching precision ADC or transceiver IC. Use Value: Preserves signal fidelity and measurement accuracy by limiting transient-induced offset errors and avoiding saturation of front-end amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J28AHM3/61 | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification; same SMA package and thermal performance. | No functional difference; selected where halogen-free material compliance is mandated by OEM environmental policy (e.g., VW 80101). | Direct substitution if halogen-free content is required; no layout or test change needed. |
| SMA6J28AHE3/61 | 600 W peak pulse power (vs. 500 W), same VWM/VBR/VC, identical SMA package and AEC-Q101 qualification; higher IPPM = 13.3 A. | Supports higher-energy transients (e.g., ISO 7637-2 Pulse 5b) without redesign; may require updated thermal validation due to increased power dissipation. | Preferred for next-gen designs targeting extended surge immunity; not drop-in if board-level thermal margin is fully utilized. |
Compared with SMA5J28AHE3/61, SMA5J28AHM3/61 offers identical protection performance with halogen-free construction, while SMA6J28AHE3/61 delivers 20 % higher surge power handling - enabling longer transient duration support without clamping voltage degradation.
Availability
SMA5J28AHE3/61 is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and DC-DC converter designs requiring stable component supply, AEC-Q101 qualification, and high-reliability transient suppression.
Supply support for SMA5J28AHE3/61 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, power efficiency, and automotive-grade qualification.
The SMA5J series was developed specifically for high-power-density, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where space-constrained, high-surge-capability protection is mandatory.
FAQ
What is the clamping voltage of the SMA5J28AHE3/61 under a 10/1000 µs surge?
The SMA5J28AHE3/61 has a maximum clamping voltage (VC) of 45.4 V at 11.0 A peak pulse current with a 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that protected circuits experience no more than 45.4 V during standardized surge events - critical for ensuring compatibility with 3.3 V, 5 V, and 24 V system components.
Is the SMA5J28AHE3/61 qualified for automotive applications?
Yes, the SMA5J28AHE3/61 is AEC-Q101 qualified, meaning it has passed stress tests for temperature cycling, high-temperature operating life, and mechanical shock required for automotive under-hood and cabin applications. The "HE3" suffix explicitly denotes RoHS-compliant and AEC-Q101-qualified construction per Vishay's ordering nomenclature.
What does the "/61" suffix indicate in SMA5J28AHE3/61?
The "/61" suffix in SMA5J28AHE3/61 specifies the packaging format: 7-inch diameter plastic tape and reel containing 1800 units. This is the standard shipping configuration for SMT assembly lines and is compatible with most pick-and-place equipment using EIA-481-D carrier tape specifications.
How does the SMA5J28AHE3/61 differ from bidirectional variants like SMA5J28CA?
The SMA5J28AHE3/61 is unidirectional and features a cathode band for polarity-sensitive placement, whereas SMA5J28CA is bidirectional with no polarity marking and symmetrical clamping in both directions. Unidirectional types offer lower leakage and better forward conduction characteristics, making SMA5J28AHE3/61 preferred for DC rail protection where reverse blocking is required.
What is the thermal resistance of the SMA5J28AHE3/61, and how does it affect layout?
The SMA5J28AHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. To maintain TJ ≤ 150 °C during repetitive surges, PCB layout must follow Vishay's recommended pad dimensions and avoid excessive trace length or narrow traces that increase thermal impedance.
SMA5J28AHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 11A
- Power - Peak Pulse:
- 500W
- 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-214AC (SMA)
SMA5J28AHE3/61 FAQ
1.How can I place an order for SMA5J28AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J28AHE3/61 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 SMA5J28AHE3/61 reliable?
The price and inventory of SMA5J28AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J28AHE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J28AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J28AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J28AHE3/61?
SMA5J28AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J28AHE3/61 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 SMA5J28AHE3/61?
For technical support, including SMA5J28AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J28AHE3/61 requirements.
6.How does Aetrix verify that SMA5J28AHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J28AHE3/61 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 SMA5J28AHE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J28AHE3/61?
All SMA5J28AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J28AHE3/61, 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 SMA5J28AHE3/61 part is unused and in its original packaging.
Return procedure for SMA5J28AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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