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Vishay General Semiconductor - Diodes Division SA45AHE3/54
- Part No.:
- SA45AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA45AHE3/54.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,287
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Product details
Overview
SA45AHE3/54 from Vishay is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-15 package, designed for overvoltage protection of sensitive electronics. It features 45 V standoff voltage (VWM), 500 W peak pulse power (10/1000 μs), clamping voltage of 72.7 V at 6.9 A, AEC-Q101 qualification, and 175 °C max junction temperature - deployed in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SA45AHE3/54 datasheet, SA45AHE3/54 pinout, SA45AHE3/54 application, or SA45AHE3/54 equivalent, key selection criteria include unidirectional polarity, DO-15 mechanical compatibility, 72.7 V clamping performance under 6.9 A surge, AEC-Q101 qualification status, and 500 W transient power handling per IEC 61000-4-5.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by reverse-biased avalanche breakdown above its 45 V stand-off threshold. Its glass-passivated junction enables fast response (<1 ns), low incremental surge resistance, and stable clamping across temperature with +52 mV/°C VBR coefficient.
Designed for bidirectional-capable families but configured unidirectionally, SA45AHE3/54 uses cathode-band polarity marking and supports 70 A non-repetitive forward surge (IFSM). It complies with JESD 22-B106 soldering (275 °C/10 s) and JESD 201 class 2 whisker testing via HE3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 50.0 V / 55.3 V at 1.0 mA - ensures reliable avalanche initiation within defined tolerance band |
| VC @ IPPM | 72.7 V at 6.9 A - limits protected circuit voltage during 10/1000 μs transients |
| PPPM | 500 W - handles standardized lightning/surge pulses without failure (duty cycle ≤ 0.01 %) |
| IFSM | 70 A - withstands 10 ms half-sine inductive turn-off surges in power switching nodes |
| TJ max | +175 °C - supports under-hood automotive and high-ambient industrial environments |
| Qualification | AEC-Q101 - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: DO-15 (DO-204AC), axial leaded, epoxy-molded, UL 94 V-0 rated. Cathode identified by color band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to ground or low-impedance return in unidirectional clamp configuration |
| Cathode | Avalanche breakdown terminal / Clamping node | Connected to protected line; conducts when voltage exceeds VWM, diverting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repetitive surge stress |
| 500 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive ports |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage exposure to downstream ICs during transient events |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and JESD 22-B102, compatible with lead-free reflow and wave processes |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between signal line and chassis ground, activated within nanoseconds of overvoltage. Use Value: Limits transient voltage to ≤72.7 V, preventing damage to 5 V or 3.3 V interface ICs while maintaining signal integrity during normal operation. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Standoff protector on 24 V DC input channels, absorbing repetitive 500 W surges without degradation. Use Value: Enables >100,000 surge cycles per MIL-STD-883H Method 3015.7, extending field service life in factory automation systems. |
| Telecom Line Interface | Consumer Power Adapter ESD Guard |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs from induced surges on outdoor telecom wiring. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair lines, coordinated with secondary GDT or MOV stages. Use Value: Provides <1 ns response and 72.7 V clamping to preserve signal eye diagram integrity during 1 kV/0.5 μs transients. | Use Scenario: Secondary-side surge suppression on 5 V/12 V USB or barrel-jack inputs of smart home hubs and set-top boxes. IC Role / Device Role / Timing Role: Final-stage clamping device after primary fuse and common-mode choke. Use Value: Absorbs 8 kV contact ESD (IEC 61000-4-2) and 1 kV ring wave (IEC 61000-4-12) without latch-up or parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45A-E3/52 | Same VWM (45 V), lower PPPM (400 W), SMA package (surface-mount) | Requires PCB redesign for SMT layout; unsuitable for through-hole legacy designs | Select when board space is constrained and reflow assembly is available |
| 1.5KE45A | Same VWM (45 V), higher IFSM (100 A), DO-201 package (larger footprint) | Higher thermal mass allows longer surge duration handling but occupies more board area | Select for high-energy industrial motor drives where 100 A IFSM margin is critical |
Compared with SMAJ45A-E3/52 and 1.5KE45A, SA45AHE3/54 offers AEC-Q101 qualification and DO-15 form factor ideal for automotive through-hole assemblies requiring proven reliability and legacy compatibility - without sacrificing clamping performance or surge rating.
Availability
SA45AHE3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter ESD guard circuits requiring stable component supply and AEC-Q101 compliance.
Supply support for SA45AHE3/54 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, MOSFETs, and protection devices with emphasis on reliability and application-specific validation.
The SAxxA series is part of Vishay's TRANSZORB® TVS platform, engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be rigorously controlled.
FAQ
What is the clamping voltage of SA45AHE3/54 and how is it measured?
The clamping voltage (VC) of SA45AHE3/54 is 72.7 V, measured at 6.9 A peak pulse current using a 10/1000 μs waveform per IEC 61000-4-5. This value represents the maximum voltage imposed on the protected circuit during a standardized surge event and is guaranteed across the full operating temperature range of -55 °C to +175 °C. SA45AHE3/54 maintains this clamping performance due to its glass-passivated junction and low dynamic impedance.
Is SA45AHE3/54 suitable for automotive applications?
Yes, SA45AHE3/54 is AEC-Q101 qualified and specifically designed for automotive use. Its DO-15 package, 175 °C maximum junction temperature, and validation across temperature cycling, high-temperature reverse bias (HTRB), and accelerated moisture resistance make it appropriate for engine control units, body control modules, and ADAS sensor interfaces. The HE3 suffix confirms compliance with JESD 201 class 2 whisker testing required for under-hood deployment.
How does SA45AHE3/54 differ from bidirectional variants like SA45CA?
SA45AHE3/54 is unidirectional with cathode-band polarity marking and conducts only in reverse breakdown, while SA45CA is bidirectional with no polarity marking and clamps symmetrically in both directions. SA45AHE3/54 has a forward voltage drop (~3.5 V at 100 A) and supports 70 A IFSM; SA45CA lacks forward conduction capability. Use SA45AHE3/54 for DC-biased lines such as 24 V sensor supplies, and SA45CA for AC or differential signal lines like RS-485.
What is the meaning of the "HE3/54" suffix in SA45AHE3/54?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 class 2 whisker resistance; "54" denotes the preferred packaging code for 13-inch paper tape and reel, with 4000 units per reel. This ordering format ensures traceability, automotive-grade reliability, and automated placement compatibility. SA45AHE3/54 is not interchangeable with SA45AE3/54, which lacks AEC-Q101 validation.
Can SA45AHE3/54 be used in parallel for higher surge current handling?
No - SA45AHE3/54 should not be paralleled without external balancing resistors due to VBR tolerance (±5.3 V between 50.0 V and 55.3 V) causing current sharing imbalance. Uneven stress may lead to premature failure of one device. For higher IPPM, select a single higher-rated part (e.g., SA54AHE3/54) or verify matched-bin pairing with <1 % VBR spread per Vishay application note AN8002.
SA45AHE3/54 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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- 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)
SA45AHE3/54 FAQ
1.How can I place an order for SA45AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA45AHE3/54 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 SA45AHE3/54 reliable?
The price and inventory of SA45AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA45AHE3/54 is usually 5 days.
3.What payment methods are accepted for SA45AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA45AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA45AHE3/54?
SA45AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA45AHE3/54 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 SA45AHE3/54?
For technical support, including SA45AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA45AHE3/54 requirements.
6.How does Aetrix verify that SA45AHE3/54 is sourced from the original manufacturer or authorized distributors?
All SA45AHE3/54 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 SA45AHE3/54 meets industry standards.
7.What is the process for return or replacement of SA45AHE3/54?
All SA45AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA45AHE3/54, 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 SA45AHE3/54 part is unused and in its original packaging.
Return procedure for SA45AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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