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Vishay General Semiconductor - Diodes Division SMAJ36AHE3_A/H
- Part No.:
- SMAJ36AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ36AHE3_A/H.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,090
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Product details
Overview
SMAJ36AHE3_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 sensitive electronics. It features a 36 V standoff voltage (VWM), 40.0–44.2 V breakdown voltage (VBR) at 1 mA, 58.1 V maximum clamping voltage (VC) at 6.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMAJ36AHE3_A/H datasheet, SMAJ36AHE3_A/H pinout, SMAJ36AHE3_A/H application, or SMAJ36AHE3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, unidirectional polarity with cathode band marking, 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 fast-acting shunt protector: under transient overvoltage exceeding VBR, it avalanches into low-impedance conduction to clamp the line voltage to ≤58.1 V while diverting up to 6.9 A (10/1000 μs). Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability across -55 °C to +150 °C operating junction temperature range.
The device is rated for 400 W peak pulse power below 78 V (derated to 300 W above), with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), enabling effective heat dissipation when mounted per recommended pad layout. It meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 μA; defines safe operating margin for 33–36 V DC supply rails. |
| VBR (min/max) | 40.0 V / 44.2 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above normal operating voltage with margin against false clamping. |
| VC @ IPPM | 58.1 V at 6.9 A - Clamped voltage during 10/1000 μs surge; guarantees downstream ICs (e.g., microcontrollers, CAN transceivers) remain below absolute maximum ratings. |
| PPPM | 400 W - Peak pulse power handling capability; sustains repetitive transients from inductive switching (e.g., solenoid drivers) without degradation. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports protection against accidental DC overvoltage events. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | SMA (DO-214AC) - Surface-mount package with 0.208" × 0.157" footprint; compatible with standard pick-and-place equipment and IPC-7351B land patterns. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. Cathode indicated by black band on body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line (e.g., 36 V rail); conducts avalanche current to ground during overvoltage events. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or low-impedance return plane; completes clamping path with minimal inductance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for engine control, ADAS, and body electronics. |
| 400 W peak pulse power (10/1000 μs) | Handles high-energy transients from load dump or inductive kickback without failure; derates gracefully above 78 V per spec. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs - critical for 3.3 V/5 V logic interfacing with 36 V systems via level shifters or isolators. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture sensitivity concerns or pre-bake requirements. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1.0 μA at VWM) over lifetime and temperature extremes. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 36 V battery-fed ECU power inputs against ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 3a/b (load dump simulation). IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and chassis ground, clamping transients within 1 ns response time. Use Value: Limits voltage excursion to ≤58.1 V, preventing damage to 40 V-rated DC-DC converters and microcontroller power domains. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) from ESD and cable discharge events in factory automation sensors. IC Role / Device Role / Timing Role: TVS connected anode-to-ground, cathode-to-signal line; absorbs ±8 kV HBM ESD per IEC 61000-4-2. Use Value: Maintains signal integrity with <1.0 μA leakage at 36 V, avoiding offset errors in precision current sources. |
| Telecom DC Power Interface | Consumer Device USB/Power Adapter Input |
|
Use Scenario: Front-end protection for 36 V PoE++ powered devices (e.g., PTZ cameras) exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC stage; coordinated with GDT or MOV for multi-stage protection. Use Value: Withstands 400 W pulses without parametric shift, ensuring sustained operation after repeated surge events. |
Use Scenario: Overvoltage guard on 36 V input of portable medical chargers or smart home hubs accepting wide-range AC adapters. IC Role / Device Role / Timing Role: Standalone unidirectional TVS on main DC input, sized to absorb 10/1000 μs surges from faulty adapters. Use Value: 58.1 V clamping voltage provides ≥2 V margin below typical 60 V input stage MOSFET VDSS ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ36A-E3/61 | Same electrical specs and SMA package; RoHS-compliant commercial grade (non-AEC-Q101 qualified). | Lacks automotive qualification; not approved for under-hood or safety-critical vehicle subsystems. | Select when cost-sensitive industrial or consumer designs do not require AEC-Q101 validation. |
| SMAJ36CAHE3_A/H | Bidirectional variant with identical VWM (36 V), VBR, and VC; symmetric clamping in both polarities. | Required for AC-coupled or floating signal lines where reverse polarity transients occur (e.g., RS-485, CAN FD). | Choose for bidirectional protection needs; SMAJ36AHE3_A/H is unsuitable for AC or dual-polarity surge scenarios. |
Compared with SMAJ36A-E3/61, SMAJ36AHE3_A/H adds AEC-Q101 qualification and extended reliability testing for automotive use; compared with SMAJ36CAHE3_A/H, it provides unidirectional clamping optimized for DC power rail protection with lower leakage and simpler grounding topology.
Availability
SMAJ36AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor modules, telecom power interfaces, and consumer DC adapter inputs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ36AHE3_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 performance.
The SMAJ series delivers standardized, high-power TVS diodes for board-level transient suppression across automotive, industrial, and communications markets - engineered for rapid response, precise clamping, and ruggedized packaging.
FAQ
What is the clamping voltage of SMAJ36AHE3_A/H at its rated peak pulse current?
The SMAJ36AHE3_A/H has a maximum clamping voltage (VC) of 58.1 V at 6.9 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and ensures protected circuits remain within safe operating limits during surge events. The SMAJ36AHE3_A/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMAJ36AHE3_A/H qualified for automotive applications?
Yes, SMAJ36AHE3_A/H is AEC-Q101 qualified, as confirmed in Vishay's ordering information and thermal characteristics notes. This qualification covers stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing - making SMAJ36AHE3_A/H suitable for engine control units, body electronics, and ADAS modules where automotive-grade reliability is mandatory.
What is the standoff voltage and breakdown voltage range for SMAJ36AHE3_A/H?
The SMAJ36AHE3_A/H has a reverse standoff voltage (VWM) of 36 V and a breakdown voltage (VBR) range of 40.0 V to 44.2 V at 1 mA test current. This 4.2 V window ensures robust margin against normal operating voltage fluctuations while guaranteeing reliable avalanche initiation during transients. The SMAJ36AHE3_A/H datasheet specifies these values under TA = 25 °C with tight tolerances validated across production lots.
Does SMAJ36AHE3_A/H have a unidirectional or bidirectional configuration?
SMAJ36AHE3_A/H is a unidirectional TVS diode, indicated by the "A" suffix and presence of a cathode band on the SMA package. It conducts only in reverse bias during overvoltage events and must be oriented with cathode toward the protected line. Unlike bidirectional variants (e.g., SMAJ36CAHE3_A/H), SMAJ36AHE3_A/H is not symmetrical and cannot suppress positive-going transients on grounded lines without additional circuitry.
What package type and mounting specifications apply to SMAJ36AHE3_A/H?
SMAJ36AHE3_A/H uses the SMA (DO-214AC) surface-mount package with dimensions of 0.208" × 0.157", matte tin-plated leads, and MSL Level 1 rating. It is designed for reflow soldering at peak temperatures up to 260 °C and requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for optimal thermal performance. The SMAJ36AHE3_A/H footprint complies with IPC-7351B standards and supports high-speed automated placement.
SMAJ36AHE3_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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- 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)
SMAJ36AHE3_A/H FAQ
1.How can I place an order for SMAJ36AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ36AHE3_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 SMAJ36AHE3_A/H reliable?
The price and inventory of SMAJ36AHE3_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 SMAJ36AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ36AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ36AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ36AHE3_A/H?
SMAJ36AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ36AHE3_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 SMAJ36AHE3_A/H?
For technical support, including SMAJ36AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ36AHE3_A/H requirements.
6.How does Aetrix verify that SMAJ36AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ36AHE3_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 SMAJ36AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ36AHE3_A/H?
All SMAJ36AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ36AHE3_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 SMAJ36AHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ36AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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