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Vishay General Semiconductor - Diodes Division SMAJ60-E3/61
- Part No.:
- SMAJ60-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ60-E3/61.pdf
- Description:
- TVS DIODE 60VWM 107VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,310
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Product details
Overview
SMAJ60-E3/61 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping inductive switching transients and ESD events on power rails and signal lines. It features 60 V stand-off voltage (VWM), 66.7–81.5 V breakdown voltage (VBR at 1 mA), 107 V maximum clamping voltage (VC) at 3.7 A peak pulse current, 400 W peak pulse power (10/1000 µs), and 40 A surge current rating (8.3 ms half-sine). It is widely used to protect MOSFET gates, microcontroller I/O, and automotive sensor interfaces.
For engineers reviewing the SMAJ60-E3/61 datasheet, SMAJ60-E3/61 pinout, SMAJ60-E3/61 application, or SMAJ60-E3/61 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, leakage current at operating voltage, thermal resistance (RθJA = 120 °C/W), RoHS compliance, and J-STD-020 MSL Level 1 qualification for surface-mount reflow.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown above its VBR threshold, providing low-impedance shunting of transient energy to ground. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
It delivers 400 W peak pulse power (10/1000 µs waveform) up to 78 V; above that, derated to 300 W. With 1.0 µA max reverse leakage at 60 V and 107 V clamping at 3.7 A, it maintains tight voltage margins for 5 V–60 V rail protection while supporting automated placement on standard SMT lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 60 V - Maximum continuous reverse working voltage before conduction begins; sets upper limit for safe operation on protected line. |
| VBR (min/max) | 66.7 V / 81.5 V at 1 mA - Confirmed breakdown range ensures reliable triggering without premature conduction during normal operation. |
| VC @ IPPM | 107 V at 3.7 A - Clamping voltage defines worst-case overvoltage seen by downstream circuitry during 10/1000 µs surge. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak pulse power rating determines survivability against standardized lightning/surge waveforms. |
| IFSM | 40 A - Single 8.3 ms half-sine surge current rating validates robustness against motor-switching or relay-coil turn-off spikes. |
| TJ Range | −55 °C to +150 °C - Full industrial temperature capability enables use in under-hood automotive and industrial power supplies. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance informs PCB copper pad design requirements for sustained surge duty cycles. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, molded plastic case with matte tin-plated leads. Cathode indicated by band; anode is unmarked end. Compliant with UL 94 V-0 flammability rating and J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VWM exceeded. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping path during avalanche event. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges on 12–48 V systems without derating. |
| 107 V clamping at 3.7 A | Provides ≥17 V margin below 125 V absolute max rating of common 100 V MOSFETs and gate drivers. |
| 1.0 µA max reverse leakage @ 60 V | Minimizes standby power loss and avoids false triggering in high-impedance sensor bias networks. |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
| RoHS-compliant, commercial-grade (E3 suffix) | Meets EU environmental directives and JESD201 Class 1A whisker resistance for long-term field reliability. |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses in 12 V vehicle subsystems. IC Role / Device Role: Unidirectional clamping diode placed between sensor signal line and chassis ground. Use Value: Limits transient overshoot to ≤107 V, preventing damage to 3.3 V/5 V ADC inputs and transceiver ESD structures while maintaining <1 µA leakage at 12 V nominal. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against inductive kickback from solenoid valves and relay coils. IC Role / Device Role: Rail clamp on 24 V supply line feeding optocoupler input stages. Use Value: Absorbs 400 W surges without degradation, ensuring >100,000 switching cycles with no parameter drift per AEC-Q101-referenced reliability testing. |
| DC Power Supply Input Protection | USB Port ESD Suppression |
Use Scenario: Secondary-side overvoltage suppression on 48 V telecom power supplies subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role: Unidirectional TVS connected between +48 V rail and ground, upstream of DC-DC converters. Use Value: Clamps 10/1000 µs surges to 107 V, keeping downstream 60 V-rated FETs within safe operating area while dissipating full 400 W pulse energy. |
Use Scenario: ESD protection for USB 2.0 data lines (D+/D−) in embedded host devices exposed to ±8 kV contact discharge (IEC 61000-4-2). IC Role / Device Role: Discrete unidirectional TVS placed in series with each data line, referenced to ground. Use Value: Sub-1 ns response time and 107 V clamping prevent latch-up in USB PHY transceivers, with <0.5 pF junction capacitance preserving signal integrity up to 480 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ60A-E3/61 | Lower VBR range (66.7–73.7 V), tighter tolerance; 96.8 V clamping at 4.1 A; same package and power rating. | Better suited for 5 V–3.3 V logic rail protection where lower clamping margin is critical; higher leakage (1 µA vs. 1 µA) but identical VWM. | Select SMAJ60A-E3/61 when clamping voltage must be minimized below 100 V for sub-100 V ICs; otherwise SMAJ60-E3/61 offers wider VBR tolerance for manufacturing variance. |
| SMCJ60A-E3/73 | DO-214AB (SMC) package; 1500 W peak power; 100 V clamping at 12.3 A; higher thermal mass and RθJA = 19 °C/W. | Used in high-energy surge environments (e.g., AC mains input, solar inverters); requires larger PCB footprint and different pad layout. | Choose SMCJ60A-E3/73 only when 400 W is insufficient-e.g., for IEC 61000-4-5 Level 4 compliance; SMAJ60-E3/61 remains optimal for space-constrained 24–48 V board-level protection. |
Compared with SMAJ60A-E3/61, the SMAJ60-E3/61 provides broader VBR tolerance for relaxed manufacturing screening, while versus SMCJ60A-E3/73, it trades peak power for compact DO-214AC footprint and compatibility with dense SMT layouts-making it ideal for cost-sensitive, space-limited industrial and automotive control modules.
Availability
SMAJ60-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, DC power supply input protection, and USB port ESD suppression requiring stable component supply across production lifecycles.
Supply support for SMAJ60-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 performance.
The SMAJ series was developed for surface-mount transient suppression in space-constrained, high-reliability applications-including automotive, industrial automation, and telecom infrastructure-where consistent clamping, low leakage, and reflow compatibility are mandatory.
FAQ
What is the maximum clamping voltage of the SMAJ60-E3/61 under a 10/1000 µs surge?
The SMAJ60-E3/61 has a maximum clamping voltage (VC) of 107 V when subjected to its rated peak pulse current of 3.7 A using the standardized 10/1000 µs waveform. This value is measured per Fig. 1 and Table 2 in Vishay document 88390 and defines the highest voltage that will appear across the protected line during surge conduction. Engineers must verify this clamping level remains below the absolute maximum rating of downstream components.
Is the SMAJ60-E3/61 unidirectional or bidirectional, and how is polarity identified?
The SMAJ60-E3/61 is a unidirectional transient voltage suppressor. Polarity is marked by a cathode band on the banded end of the DO-214AC (SMA) package; the unbanded end is the anode. This configuration allows it to conduct only during positive transients on the cathode side relative to anode-making it suitable for DC rail protection where reverse voltage is not expected.
Does the SMAJ60-E3/61 meet automotive qualification standards?
The SMAJ60-E3/61 carries the "E3" suffix, indicating RoHS-compliant commercial grade per JESD201 Class 1A whisker testing-but it is not AEC-Q101 qualified. For automotive applications requiring formal qualification, engineers should select the HE3-suffix variant (e.g., SMAJ60HE3/61), which is explicitly rated for high-reliability automotive use and meets AEC-Q101 stress test requirements.
What is the thermal resistance and recommended PCB layout for the SMAJ60-E3/61?
The SMAJ60-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2 × 0.2 inch (5.0 × 5.0 mm) copper pads per terminal, as specified in Vishay document 88390. To maintain surge rating integrity, designers must replicate this pad area and ensure adequate copper pour connectivity to ground planes-reducing thermal impedance and preventing junction overheating during repetitive pulse events.
How does the SMAJ60-E3/61 compare to the SMAJ60A-E3/61 in terms of electrical performance?
The SMAJ60A-E3/61 features a tighter breakdown voltage range (66.7–73.7 V vs. 66.7–81.5 V) and lower clamping voltage (96.8 V at 4.1 A vs. 107 V at 3.7 A), making it preferable for designs requiring stricter overvoltage control. Both share identical VWM (60 V), PPPM (400 W), package (DO-214AC), and RoHS compliance. The choice depends on whether design priority lies in clamping precision (SMAJ60A) or process tolerance margin (SMAJ60).
SMAJ60-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):
- 60V
- Voltage - Breakdown (Min):
- 66.7V
- Voltage - Clamping (Max) @ Ipp:
- 107V
- Current - Peak Pulse (10/1000µs):
- 3.7A
- 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)
SMAJ60-E3/61 FAQ
1.How can I place an order for SMAJ60-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ60-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 SMAJ60-E3/61 reliable?
The price and inventory of SMAJ60-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 SMAJ60-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ60-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ60-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ60-E3/61?
SMAJ60-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ60-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 SMAJ60-E3/61?
For technical support, including SMAJ60-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ60-E3/61 requirements.
6.How does Aetrix verify that SMAJ60-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ60-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 SMAJ60-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ60-E3/61?
All SMAJ60-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ60-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 SMAJ60-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ60-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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