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Vishay General Semiconductor - Diodes Division SA48AHE3/54
- Part No.:
- SA48AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA48AHE3/54.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,688
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Product details
Overview
SA48AHE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for circuit protection against ESD and surge events. It features 48 V standoff voltage (VWM), 53.3–58.9 V breakdown range (VBR at 1 mA), 77.4 V clamping voltage (VC) at 6.5 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and I/O lines of automotive control modules.
For engineers reviewing the SA48AHE3/54 datasheet, SA48AHE3/54 pinout, SA48AHE3/54 application, or SA48AHE3/54 equivalent, key selection criteria include its AEC-Q101 qualification, 175 °C max junction temperature, low 1.0 µA reverse leakage at VWM, glass-passivated junction, and compatibility with lead-free reflow and wave soldering per J-STD-002.
Technical Context
The SA48AHE3/54 operates as a unidirectional avalanche-clamping device, triggered when reverse voltage exceeds its specified VBR range (53.3–58.9 V). Its low incremental clamping resistance ensures rapid voltage limiting during transients up to 6.5 A (10/1000 µs), with clamped output held ≤77.4 V to protect downstream MOSFETs or ICs.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and supports operation from −55 °C to +175 °C. The DO-15 package enables through-hole mounting with matte tin-plated leads compliant with JESD 22-B102 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Ensures predictable turn-on across process and temperature variation |
| VC @ IPPM | 77.4 V at 6.5 A - Limits transient voltage seen by protected ICs to safe level |
| PPPM | 500 W - Sustains high-energy surges such as ISO 7637-2 Pulse 1/2a without failure |
| IR @ VWM | 1.0 µA - Negligible leakage current preserves low-power standby integrity |
| TJ max | +175 °C - Enables placement near hot components like power converters or engine controllers |
| Package | DO-15 (DO-204AC) - Standard through-hole outline with 0.242–0.258 inch body length for mechanical robustness |
Pinout & Package
DO-15 (DO-204AC) molded epoxy package with axial leads; cathode indicated by color band on one end. Matte tin-plated leads support J-STD-002 solderability and JESD 22-B102 wetting balance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., ground or return) in unidirectional configuration |
| Cathode (banded end) | Reverse-biased clamping node | Connected to protected line (e.g., 48 V supply rail); conducts only during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling |
| AEC-Q101 qualified | Validated for automotive applications including powertrain and body electronics |
| 500 W peak pulse power (10/1000 µs) | Withstands repetitive load dump and inductive switching transients in 12 V/24 V systems |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes overvoltage margin required for protected ICs' absolute maximum ratings |
| RoHS-compliant HE3 suffix | Meets JESD 201 Class 2 whisker resistance and automotive material compliance (Doc. 99912) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and chassis ground to clamp surges above 48 V. Use Value: Clamps to ≤77.4 V within nanoseconds, preventing damage to MCU power inputs and CAN transceivers. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb ESD and cable discharge events. Use Value: Sub-1 µA leakage avoids signal offset errors; fast response preserves 12-bit ADC accuracy. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Securing 48 V PoE-powered network switches against lightning-induced surges on DC input. IC Role / Device Role / Timing Role: Primary overvoltage clamp on front-end DC-DC converter input stage. Use Value: 500 W rating handles multi-pulse surge tests; DO-15 footprint allows cost-effective board-level layout. | Use Scenario: Shielding microcontroller I/O and gate drivers from back-EMF spikes in washing machine motor inverters. IC Role / Device Role / Timing Role: TVS across half-bridge FET source-drain to suppress inductive kickback. Use Value: 175 °C rating permits placement near heatsinks; AEC-Q101 grade ensures field longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/5A | Same VWM (48 V), but SMA package (SMT); 400 W PPPM; higher VC (79.4 V) | Surface-mount alternative for space-constrained PCBs; not through-hole compatible | Select for automated assembly where board real estate is limited and thermal mass is lower |
| 1.5KE48A | Same VWM/VBR specs, but DO-201 package; 1500 W PPPM; larger footprint and higher IPPM (32.3 A) | Higher energy handling for industrial mains-connected equipment; less suitable for automotive footprints | Choose when surge immunity must exceed ISO 16750-2 Level IV and board space allows larger case |
Compared with SMAJ48A-E3/5A and 1.5KE48A, the SA48AHE3/54 offers optimal balance of AEC-Q101 qualification, DO-15 through-hole robustness, and 500 W surge capability - making it preferred for automotive and industrial control boards requiring proven mechanical reliability and legacy-compatible mounting.
Availability
SA48AHE3/54 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power supplies, and appliance motor controllers requiring stable component supply across extended production lifecycles.
Supply support for SA48AHE3/54 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, and protection devices with emphasis on reliability and automotive qualification.
The SAxxA series is engineered specifically for robust transient suppression in harsh environments - targeting automotive power distribution, industrial automation, and infrastructure equipment where AEC-Q101 compliance and high-temperature operation are mandatory.
FAQ
What is the clamping voltage of SA48AHE3/54 and how does it protect downstream circuits?
The SA48AHE3/54 has a maximum clamping voltage (VC) of 77.4 V at 6.5 A peak pulse current (10/1000 µs). This means that when a transient exceeds its 48 V standoff rating, the SA48AHE3/54 rapidly enters avalanche breakdown and limits the voltage seen by protected components to ≤77.4 V - well below typical 100 V absolute maximum ratings of automotive-grade MCUs and transceivers. Its low dynamic impedance ensures minimal overshoot during fast-rising events.
Is SA48AHE3/54 suitable for automotive applications and what qualifications does it hold?
Yes, SA48AHE3/54 is explicitly AEC-Q101 qualified (as noted in the HE3 suffix and datasheet note), meaning it has passed stress tests for temperature cycling, humidity, mechanical shock, and high-temperature reverse bias required for automotive electronics. Its −55 °C to +175 °C operating range and DO-15 mechanical robustness make it suitable for engine control units, body control modules, and ADAS power supplies.
What does the "HE3/54" suffix mean in SA48AHE3/54?
The "HE3" suffix indicates RoHS-compliant construction with JESD 201 Class 2 whisker resistance - required for automotive and high-reliability applications. The "/54" denotes packaging in 13-inch paper tape and reel, with 4000 units per reel. This ordering code aligns with Vishay's standard delivery format for volume production use.
How does SA48AHE3/54 differ from bidirectional TVS diodes like SA48CA?
The SA48AHE3/54 is unidirectional and functions only under reverse bias - ideal for DC power rail protection where polarity is fixed. In contrast, SA48CA is bidirectional and clamps in both directions, suited for AC lines or data buses like RS-485. The SA48AHE3/54 offers tighter VBR tolerance (53.3–58.9 V vs. ±5 % for CA types) and lower leakage, but cannot replace SA48CA in symmetrical signal protection without circuit redesign.
Can SA48AHE3/54 be used in parallel for higher surge current handling?
No - SA48AHE3/54 should not be paralleled without external balancing resistors due to VBR mismatch (±5 % tolerance), which causes uneven current sharing and potential thermal runaway. For higher IPPM, select a single higher-rated device like 1.5KE48A or use a TVS array with matched characteristics. Parallel use voids AEC-Q101 qualification unless validated per application-specific derating.
SA48AHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 6.5A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA48AHE3/54 FAQ
1.How can I place an order for SA48AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA48AHE3/54 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 SA48AHE3/54 reliable?
The price and inventory of SA48AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA48AHE3/54 is usually 5 days.
3.What payment methods are accepted for SA48AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA48AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA48AHE3/54?
SA48AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA48AHE3/54 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 SA48AHE3/54?
For technical support, including SA48AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA48AHE3/54 requirements.
6.How does Aetrix verify that SA48AHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA48AHE3/54 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 SA48AHE3/54 meets industry standards.
7.What is the process for return or replacement of SA48AHE3/54?
All SA48AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA48AHE3/54, 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 SA48AHE3/54 part is unused and in its original packaging.
Return procedure for SA48AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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