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Vishay General Semiconductor - Diodes Division SMAJ58-E3/61
- Part No.:
- SMAJ58-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ58-E3/61.pdf
- Description:
- TVS DIODE 58VWM 103VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,344
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Product details
Overview
SMAJ58-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping transient overvoltages on power and signal lines. It features a 58 V stand-off voltage (VWM), 64.4–78.7 V breakdown voltage (VBR at 1 mA), 103 V maximum clamping voltage (VC) at 3.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMAJ58-E3/61 datasheet, SMAJ58-E3/61 pinout, SMAJ58-E3/61 application, or SMAJ58-E3/61 equivalent, key selection criteria include clamping voltage margin relative to protected device's absolute maximum rating, leakage current at operating bias (<1 µA at 58 V), thermal resistance (120 °C/W junction-to-ambient), unidirectional polarity marking (cathode band), and RoHS-compliant matte tin plating per J-STD-002.
Technical Context
This unidirectional TVS operates by avalanche breakdown above its VBR, limiting transient energy via low dynamic impedance. Its glass-passivated junction ensures stable VBR tolerance (±5 % for SMAJ58, per family spec) and fast response time (<1 ns), enabling protection against ESD (IEC 61000-4-2), lightning surges (IEC 61000-4-5), and inductive switching spikes.
Thermal performance is defined by RθJA = 120 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 30 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The device meets MSL Level 1 (J-STD-020), withstands solder dip at 260 °C for 40 s, and complies with RoHS 2002/95/EC and WEEE 2002/96/EC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58 V - maximum continuous reverse working voltage before significant leakage; sets upper limit of normal operating bias. |
| VBR (min/max) | 64.4 V / 78.7 V at 1 mA - guaranteed avalanche onset range; determines minimum overvoltage threshold for clamping activation. |
| VC @ IPPM | 103 V at 3.9 A - peak clamped voltage during 10/1000 µs surge; must remain below protected device's absolute max rating. |
| PPPM | 400 W - peak pulse power handling (derated above 78 V to 300 W); defines energy absorption capacity per transient event. |
| IFSM | 40 A - 8.3 ms half-sine surge current rating (unidirectional only); validates robustness against repetitive inrush or fault currents. |
| Leakage (ID) | <1 µA at 58 V - ensures minimal power loss and signal integrity degradation in standby or bias conditions. |
| Package | DO-214AC (SMA) - standardized surface-mount outline with cathode band marking; compatible with automated placement and reflow. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with two leads, cathode identified by a visible band on one end. Leads are matte tin plated, solderable per J-STD-002 and JESD22-B102, rated for 260 °C solder dip (40 s). Meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side of protected line; conducts during forward surge (e.g., reverse-biased supply rail faults). |
| Cathode (banded end) | Avalanche clamping node | Connected to higher-potential side (e.g., VCC rail or signal line); initiates clamping when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| 400 W peak pulse power (10/1000 µs) | Supports high-energy transients without failure; derates to 300 W above 78 V per family specification. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping precision for sensitive logic inputs. |
| MSL Level 1 moisture sensitivity | Enables standard SMT assembly without baking; compatible with lead-free reflow profiles up to 260 °C peak. |
| RoHS-compliant matte tin plating | Prevents tin whisker growth (JESD201 Class 1A), ensuring long-term solder joint integrity in automotive and industrial environments. |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V DC input rails in programmable logic controllers (PLCs) against load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp positive transients exceeding 58 V. Use Value: Limits clamped voltage to 103 V, maintaining safe margin below 120 V-rated input capacitors and controller ICs. |
Use Scenario: Safeguarding LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control units. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb ESD (±8 kV contact) and ISO 7637-2 pulse 1/2a transients. Use Value: Sub-1 ns response and <1 µA leakage preserve signal fidelity while meeting AEC-Q101 stress requirements. |
| Telecom Line Card Surge Protection | Consumer Device USB Port Protection |
Use Scenario: Shielding 24 V auxiliary power feeds and RS-485 data lines in base station remote radio units exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on power and differential signal lines to suppress common-mode and differential-mode transients. Use Value: 400 W rating handles IEC 61000-4-5 combination wave (1.2/50 µs voltage, 8/20 µs current) without degradation. |
Use Scenario: Guarding 5 V USB VBUS and D+/D− lines in smart home hubs against ESD and hot-plug transients. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on VBUS; bidirectional variant preferred for data lines (not SMAJ58-E3/61). Use Value: 58 V VWM avoids conduction during normal 5 V operation while clamping >100 V surges to prevent port controller latch-up. |
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 | Lower VBR range (64.4–71.2 V) and tighter tolerance; clamps at 93.6 V @ 4.3 A. | Better suited for systems requiring lower clamping voltage margin near 58 V rails. | Select SMAJ58A-E3/61 when protected circuit has ≤95 V absolute maximum rating and tighter VBR consistency is critical. |
| SMBJ58A-E3/52 | Same VWM/VBR specs but in larger DO-214AA (SMB) package; 600 W PPPM rating. | Higher power handling supports more severe surge environments (e.g., outdoor telecom). | Choose SMBJ58A-E3/52 when board layout allows larger footprint and system-level surge testing exceeds 400 W capability. |
Compared with SMAJ58-E3/61, SMAJ58A-E3/61 offers reduced clamping voltage at the cost of slightly lower surge current headroom, while SMBJ58A-E3/52 trades compactness for higher energy absorption - making SMAJ58-E3/61 optimal for space-constrained 400 W-class industrial PCBs where DO-214AC footprint is mandated.
Availability
SMAJ58-E3/61 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor modules, telecom line cards, and consumer USB interface protection requiring stable component supply across extended production cycles.
Supply support for SMAJ58-E3/61 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for surface-mount transient suppression in harsh environments - targeting industrial automation, automotive electronics, and infrastructure equipment where robustness against ESD, lightning, and inductive switching is mandatory.
FAQ
What is the maximum clamping voltage of SMAJ58-E3/61 under a 10/1000 µs surge?
The SMAJ58-E3/61 exhibits a maximum clamping voltage (VC) of 103 V when subjected to its rated peak pulse current of 3.9 A with a 10/1000 µs waveform. This value is measured per Fig. 1 and Fig. 3 in Vishay document 88390 and represents the upper bound of voltage seen by downstream components during transient events - critical for verifying margin against IC absolute maximum ratings. The SMAJ58-E3/61 maintains this clamping performance across its specified operating temperature range.
Is SMAJ58-E3/61 RoHS compliant and qualified for automotive use?
SMAJ58-E3/61 carries the "E3" suffix, confirming RoHS compliance per 2002/95/EC and WEEE 2002/96/EC, with matte tin-plated leads meeting JESD201 Class 1A whisker resistance. However, it is not AEC-Q101 qualified; that status applies only to "HE3"-suffixed variants (e.g., SMAJ58AHE3/61). For automotive applications requiring qualification, SMAJ58-E3/61 may be used in non-safety-critical subsystems but requires additional validation per OEM requirements.
How does the thermal resistance of SMAJ58-E3/61 affect PCB layout?
SMAJ58-E3/61 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. To maintain TJ ≤ 150 °C under worst-case 400 W surge duty, designers must ensure adequate copper area and avoid excessive trace length or isolation. Reducing pad size or using thinner copper increases RθJA, risking thermal runaway during repetitive surges - a key constraint reflected in the SMAJ58-E3/61 datasheet derating curves.
Can SMAJ58-E3/61 be used in bidirectional protection circuits?
No - SMAJ58-E3/61 is a unidirectional TVS diode, identifiable by its cathode band marking and specified electrical characteristics for reverse-biased operation only. Bidirectional protection requires CA-suffixed parts (e.g., SMAJ58CA), which exhibit symmetrical VBR in both polarities. Using SMAJ58-E3/61 in AC or floating signal paths risks forward conduction and failure; the SMAJ58-E3/61 datasheet explicitly restricts its use to DC or referenced single-polarity lines.
What is the leakage current specification for SMAJ58-E3/61 at its rated stand-off voltage?
At its rated stand-off voltage (VWM) of 58 V and ambient temperature of 25 °C, the SMAJ58-E3/61 exhibits a maximum reverse leakage current (ID) of 1 µA. This low leakage ensures minimal power loss in always-on systems and prevents unintended biasing of high-impedance sensor inputs or reference nodes - a verified parameter per Table on page 2 of Vishay document 88390, directly applicable to the SMAJ58-E3/61 variant.
SMAJ58-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 58V
- Voltage - Breakdown (Min):
- 64.4V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ58-E3/61 FAQ
1.How can I place an order for SMAJ58-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ58-E3/61 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 SMAJ58-E3/61 reliable?
The price and inventory of SMAJ58-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ58-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ58-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ58-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ58-E3/61?
SMAJ58-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ58-E3/61 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 SMAJ58-E3/61?
For technical support, including SMAJ58-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ58-E3/61 requirements.
6.How does Aetrix verify that SMAJ58-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ58-E3/61 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 SMAJ58-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ58-E3/61?
All SMAJ58-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ58-E3/61, 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 SMAJ58-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ58-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ58-E3/61 Tags
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