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Vishay General Semiconductor - Diodes Division SMAJ48HE3/61
- Part No.:
- SMAJ48HE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ48HE3/61.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,060
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Product details
Overview
SMAJ48HE3/61 from Vishay General Semiconductor is a high-reliability, AEC-Q101 qualified unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for automotive and industrial overvoltage protection. It features 48 V stand-off voltage (VWM), 53.3–65.1 V breakdown voltage (VBR at 1 mA), 85.5 V maximum clamping voltage (VC) at 4.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines of engine control units, body electronics, and sensor interfaces.
For engineers reviewing the SMAJ48HE3/61 datasheet, SMAJ48HE3/61 pinout, SMAJ48HE3/61 application, or SMAJ48HE3/61 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance values (RθJA = 120 °C/W), RoHS-compliant matte tin plating, and J-STD-002 solderability - all critical for automotive-grade ESD/surge design validation and long-term supply assurance.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <1 µA reverse leakage at 48 V, then rapidly avalanches when transient voltage exceeds VBR (min 53.3 V), limiting downstream voltage to ≤85.5 V at 4.7 A. Its glass-passivated junction ensures stable breakdown and low incremental surge resistance.
Designed for surface-mount automated placement, it meets MSL Level 1 per J-STD-020 (260 °C peak reflow), supports 40 A non-repetitive forward surge (8.3 ms half-sine), and maintains operation across –55 °C to +150 °C junction temperature range - enabling use in under-hood automotive environments without derating penalties below 78 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin for 48 V nominal systems. |
| VBR (min/max) | 53.3 V / 65.1 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system overvoltage thresholds. |
| VC @ IPPM | 85.5 V at 4.7 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected ICs. |
| PPPM | 400 W - Peak pulse power handling capability; sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 transients. |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms); supports robust protection against load dump events in 12 V/24 V vehicle systems. |
| TJ Range | –55 °C to +150 °C - Full automotive temperature range compliance; no derating required up to 150 °C junction temperature. |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient on standard 0.2 × 0.2" copper pads; informs PCB thermal layout requirements. |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards. Meets UL 94 V-0 flammability rating and RoHS 2002/95/EC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point in unidirectional configuration | Connected to protected circuit ground or low-side return path; enables clamping to ground during positive transients. |
| Cathode (banded end) | Reverse-biased terminal during normal operation | Connected to protected line (e.g., 48 V rail); conducts only when line voltage exceeds VBR, diverting surge energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and infotainment power supplies - guaranteed reliability under temperature cycling, humidity, and mechanical shock. |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage drift over lifetime; eliminates risk of parametric shift due to moisture ingress or contamination. |
| MSL Level 1 rating | Supports single-reflow assembly at 260 °C peak without popcorn effect or delamination - compatible with standard lead-free SMT processes. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response time), improving protection margin for sensitive microcontrollers and CAN transceivers. |
| J-STD-201 Class 2 whisker resistance | HE3 suffix confirms compliance with stringent automotive whisker growth prevention - essential for long-life under-vibration and high-temperature conditions. |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Camera Sensor Interface |
|---|---|
Use Scenario: Protects 48 V input rail of diesel/gasoline ECU against load dump transients (ISO 7637-2 Pulse 5a) and alternator switching spikes. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between 48 V rail and chassis ground; clamps surges within nanoseconds to prevent MCU reset or regulator latch-up. Use Value: Withstands 40 A 8.3 ms surge and limits clamped voltage to 85.5 V - maintaining functional safety integrity while eliminating need for external series impedance. |
Use Scenario: Shields LVDS or MIPI CSI-2 signal lines of rear-view or surround-view cameras from ESD (IEC 61000-4-2 ±15 kV contact) and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed inline with differential pairs; provides sub-1 ns response without distorting high-speed video signals. Use Value: Delivers 85.5 V clamping at 4.7 A while maintaining <1 µA leakage at 48 V - preserving signal integrity and preventing false triggers in image processing pipelines. |
| Body Control Module (BCM) LIN Bus Line | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Guards LIN transceiver pins against battery reverse connection, jump-start surges, and inductive kickback from solenoid loads. IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN bus line and ground; activated only during positive overvoltage events to avoid interfering with bidirectional communication. Use Value: 48 V VWM aligns precisely with 12 V system-derived LIN supply rails; 85.5 V VC ensures transceiver remains within absolute maximum ratings during worst-case transients. |
Use Scenario: Safeguards H-bridge gate drivers and current sense amplifiers in EPS motor control against MOSFET switching noise and regenerative braking surges. IC Role / Device Role / Timing Role: High-energy TVS placed across motor driver supply inputs (e.g., 48 V auxiliary rail); absorbs repetitive 400 W pulses without degradation. Use Value: 400 W peak pulse rating and 150 °C max junction temperature enable continuous operation in thermally constrained EPS enclosures - validated per AEC-Q101 stress test profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48AHE3/61 | Lower VBR range (53.3–58.9 V) and tighter 5 % tolerance; clamps at 77.4 V (vs. 85.5 V) at same 5.2 A IPPM. | Better suited for precision 48 V systems where lower clamping voltage is mandatory (e.g., FPGA I/O protection), but less margin against VBR variation. | Select SMAJ48AHE3/61 only if system-level testing confirms 77.4 V clamping satisfies downstream IC VMAX limits - otherwise SMAJ48HE3/61 offers wider safety margin. |
| SMBJ48HE3/61 | Same VWM/VBR/VC specs but in larger DO-214AA (SMB) package; higher PPPM = 600 W and RθJA = 80 °C/W. | Preferred for high-power or thermally demanding locations (e.g., main battery fuse box), but requires larger PCB footprint and may not fit space-constrained modules. | Choose SMBJ48HE3/61 when surge energy exceeds 400 W or board layout allows 2.5 mm × 4.5 mm footprint; retain SMAJ48HE3/61 for compact ECU or camera PCBs with tight area constraints. |
Compared with SMAJ48AHE3/61, the SMAJ48HE3/61 provides higher clamping voltage margin and broader VBR tolerance - ideal for cost-sensitive automotive modules where absolute precision is secondary to robustness. Against SMBJ48HE3/61, it trades power handling for space efficiency and faster thermal response in densely packed assemblies.
Availability
SMAJ48HE3/61 is available at Aetrix Electronics and suitable for automotive electronic control units, ADAS camera modules, and electric power steering systems requiring stable component supply with full AEC-Q101 traceability and RoHS compliance.
Supply support for SMAJ48HE3/61 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMAJ series is engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - emphasizing stable clamping, low leakage, and process-controlled glass-passivated junctions for long-term field reliability.
FAQ
What is the exact breakdown voltage range for SMAJ48HE3/61?
The SMAJ48HE3/61 has a minimum breakdown voltage (VBR) of 53.3 V and a maximum of 65.1 V at 1 mA test current, as specified in Vishay's Document Number 88390. This 5–10 % tolerance band ensures consistent avalanche initiation across production lots while accommodating thermal and manufacturing variance - critical for predictable clamping behavior in automotive 48 V architectures.
Is SMAJ48HE3/61 qualified for automotive use?
Yes, SMAJ48HE3/61 carries the HE3 suffix denoting high-reliability, AEC-Q101 qualified construction. It undergoes stress testing per AEC-Q101 including temperature cycling, highly accelerated life testing (HALT), and mechanical shock - validating its suitability for under-hood and safety-critical vehicle subsystems such as engine control and ADAS sensors.
What does the "HE3" suffix mean on SMAJ48HE3/61?
The "HE3" suffix on SMAJ48HE3/61 indicates RoHS-compliant, high-reliability grade construction meeting JESD201 Class 2 whisker resistance requirements and AEC-Q101 qualification. Unlike standard E3 parts, HE3 devices are screened for automotive-grade robustness, including enhanced thermal cycling endurance and extended lifetime under vibration and humidity stress.
What is the maximum clamping voltage of SMAJ48HE3/61 during a surge event?
The SMAJ48HE3/61 clamps to a maximum of 85.5 V at its rated peak pulse current of 4.7 A (10/1000 µs waveform). This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry - ensuring compatibility with 100 V-rated automotive ICs and regulators.
Can SMAJ48HE3/61 be used in bi-directional protection circuits?
No, SMAJ48HE3/61 is a unidirectional TVS diode, identifiable by its cathode band marking. For bi-directional applications (e.g., AC lines or differential buses), Vishay specifies CA-suffix variants like SMAJ48CAHE3/61. Using SMAJ48HE3/61 in reverse-biased configurations risks permanent damage due to lack of symmetrical breakdown capability.
SMAJ48HE3/61 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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 85.5V
- Current - Peak Pulse (10/1000µs):
- 4.7A
- 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)
SMAJ48HE3/61 FAQ
1.How can I place an order for SMAJ48HE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ48HE3/61 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 SMAJ48HE3/61 reliable?
The price and inventory of SMAJ48HE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ48HE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ48HE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ48HE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ48HE3/61?
SMAJ48HE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ48HE3/61 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 SMAJ48HE3/61?
For technical support, including SMAJ48HE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ48HE3/61 requirements.
6.How does Aetrix verify that SMAJ48HE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ48HE3/61 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 SMAJ48HE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ48HE3/61?
All SMAJ48HE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ48HE3/61, 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 SMAJ48HE3/61 part is unused and in its original packaging.
Return procedure for SMAJ48HE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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