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Vishay General Semiconductor - Diodes Division SMAJ58AHE3_A/H
- Part No.:
- SMAJ58AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58AHE3_A/H.pdf
- Description:
- TVS DIODE 58VWM 93.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,042
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Product details
Overview
SMAJ58AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 58 V stand-off voltage (VWM), 64.4–71.2 V breakdown voltage (VBR) at 1 mA, 93.6 V maximum clamping voltage (VC) at 4.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - ideal for automotive power supply input protection.
For engineers reviewing the SMAJ58AHE3_A/H datasheet, SMAJ58AHE3_A/H pinout, SMAJ58AHE3_A/H application, or SMAJ58AHE3_A/H equivalent, this device is selected for its AEC-Q101 qualification, low incremental surge resistance, fast response time (<1 ps), and compatibility with automated SMT assembly on industrial and automotive PCBs.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 μA leakage at 58 V), but triggers into low-impedance conduction when transients exceed VBR, clamping the protected node to ≤93.6 V. Its glass-passivated junction ensures stable avalanche characteristics and long-term reliability under repetitive surge stress.
The device is rated for 40 A non-repetitive forward surge current (IFSM), supports operating junction temperatures from –55 °C to +150 °C, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak - confirming suitability for high-reliability surface-mount applications without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - maximum continuous reverse working voltage before leakage exceeds 1 μA; defines safe operating margin for 48 V nominal systems. |
| VBR (min/max) | 64.4 V / 71.2 V at 1 mA - guaranteed avalanche initiation range; ensures consistent turn-on across temperature and unit variation. |
| VC @ IPPM | 93.6 V at 4.3 A - clamping voltage during 10/1000 μs surge; limits downstream IC stress to safe levels in 48 V bus protection. |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; sufficient for ISO 7637-2 Pulse 1/2a/5a automotive transients. |
| IFSM | 40 A - single half-sine surge rating (8.3 ms); supports protection against load dump events in automotive ECUs. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood environments with minimal derating. |
| RθJA | 120 °C/W - thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs board-level thermal design for sustained power dissipation. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE > VBR. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or low-impedance return; completes clamping path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for ECU, ADAS, and body control modules. |
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients like ISO 7637-2 Pulse 5a without degradation; eliminates need for external series impedance in many designs. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during clamping - critical for protecting 60 V-rated MOSFETs and gate drivers in 48 V systems. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without baking or special handling - reduces manufacturing cost and risk of moisture-induced defects. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage over lifetime; prevents parameter drift under thermal and humidity stress. |
Applications
| Automotive Power Input Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed microcontroller power inputs in vehicle telematics units against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VIN and GND, clamping surges within nanoseconds to prevent MCU brownout or latch-up. Use Value: With VC = 93.6 V and PPPM = 400 W, SMAJ58AHE3_A/H holds rail voltage below 100 V during ISO 16750-2 Test 4a (load dump), ensuring uninterrupted operation. |
Use Scenario: Safeguarding analog input channels of programmable logic controllers exposed to field wiring induced surges in factory automation. IC Role / Device Role / Timing Role: Front-end transient suppressor on 24 V sensor supply lines, coordinated with series resistors and filtering capacitors. Use Value: Low leakage (<1 μA at 58 V) avoids measurement error in precision 24 V loop-powered sensors; fast response preserves signal integrity during EFT bursts. |
| DC-DC Converter Input Stage | Motor Drive Gate Driver Protection |
|
Use Scenario: Input-side surge suppression for isolated 48 V-to-12 V DC-DC converters in electric power steering systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of input filter and controller IC, absorbing energy before it reaches switching FETs. Use Value: 40 A IFSM rating withstands repetitive load dump pulses; RθJA = 120 °C/W allows thermal design with minimal copper area. |
Use Scenario: Protecting high-side gate driver supply pins in 48 V BLDC motor inverters from inductive switching spikes. IC Role / Device Role / Timing Role: Localized TVS at gate driver VDD pin, placed adjacent to IC to minimize inductance in clamping path. Use Value: Sub-100 V clamping (93.6 V) prevents overvoltage damage to 100 V-rated gate drivers; SMA package enables compact layout near driver IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A-E3/61 | Same electrical specs and SMA package; RoHS-compliant commercial grade without AEC-Q101 qualification. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select SMAJ58AHE3_A/H when automotive qualification, traceable sourcing, and extended temperature validation are required. |
| SMBJ58AHE3_A/H | Same VWM, VBR, VC; higher PPPM = 600 W due to larger SMB (DO-214AA) package; RθJA = 85 °C/W. | Better power handling and thermal performance; requires larger PCB footprint and different pad layout. | Choose SMBJ58AHE3_A/H only if 400 W is insufficient and board space permits larger package. |
Compared with SMAJ58A-E3/61, SMAJ58AHE3_A/H adds AEC-Q101 qualification and tighter process controls for automotive use; compared with SMBJ58AHE3_A/H, it trades 200 W peak power for 30 % smaller footprint and identical manufacturability in high-density layouts.
Availability
SMAJ58AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and 48 V DC-DC converter designs requiring stable component supply, AEC-Q101 compliance, and surface-mount reliability.
Supply support for SMAJ58AHE3_A/H 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 SMAJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against ESD, EFT, and surge events is mission-critical.
FAQ
What is the clamping voltage of SMAJ58AHE3_A/H at its rated peak pulse current?
The SMAJ58AHE3_A/H has a maximum clamping voltage (VC) of 93.6 V at its rated peak pulse current (IPPM) of 4.3 A, measured with a 10/1000 μs waveform. This value is guaranteed across temperature and unit variation per Vishay's datasheet revision 09-Jan-2024, and defines the upper voltage limit imposed on protected circuits during surge events. The clamping performance directly enables safe operation of 100 V-rated downstream components in 48 V systems.
Is SMAJ58AHE3_A/H qualified for automotive applications?
Yes, SMAJ58AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering information and mechanical data section. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction, validated for temperature cycling, highly accelerated life testing, and surge endurance per automotive reliability standards. This makes SMAJ58AHE3_A/H suitable for engine control units, ADAS modules, and other under-hood or chassis-mounted electronics requiring certified component reliability.
What is the standoff voltage and why does it matter for SMAJ58AHE3_A/H?
The standoff voltage (VWM) of SMAJ58AHE3_A/H is 58 V - the maximum DC or continuous reverse voltage the device can block without exceeding 1 μA leakage current. This parameter sets the operational margin: it must be ≥ system nominal voltage (e.g., 48 V) but < minimum breakdown voltage (64.4 V) to ensure reliable blocking during normal operation while allowing fast triggering during transients. For SMAJ58AHE3_A/H, this 58 V rating provides optimal headroom for 48 V automotive and industrial buses.
Does SMAJ58AHE3_A/H have a defined polarity, and how is it marked?
Yes, SMAJ58AHE3_A/H is a unidirectional TVS diode with defined polarity: the banded end is the cathode, and the unbanded end is the anode. Per Vishay's mechanical data, polarity is indicated by a visible band on the SMA (DO-214AC) package body. Correct orientation is essential - the cathode must connect to the line being protected, and the anode to ground - to ensure proper clamping action during positive transients. Reverse installation would result in forward conduction and failure.
What is the thermal resistance and how does it affect PCB layout for SMAJ58AHE3_A/H?
SMAJ58AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB with no internal planes. To maintain junction temperature below 150 °C during repetitive surges, designers must allocate adequate copper area and consider thermal vias - especially important in automotive applications where ambient temperatures exceed 85 °C. Layout directly impacts sustained surge capability and long-term reliability.
SMAJ58AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 4.3A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ58AHE3_A/H FAQ
1.How can I place an order for SMAJ58AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58AHE3_A/H 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 SMAJ58AHE3_A/H reliable?
The price and inventory of SMAJ58AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ58AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58AHE3_A/H?
SMAJ58AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58AHE3_A/H 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 SMAJ58AHE3_A/H?
For technical support, including SMAJ58AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58AHE3_A/H requirements.
6.How does Aetrix verify that SMAJ58AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ58AHE3_A/H 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 SMAJ58AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ58AHE3_A/H?
All SMAJ58AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58AHE3_A/H, 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 SMAJ58AHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ58AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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