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Vishay General Semiconductor - Diodes Division SA30HE3/73
- Part No.:
- SA30HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA30HE3/73.pdf
- Description:
- TVS DIODE 30VWM 53.5VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,356
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Product details
Overview
SA30HE3/73 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 48.4 V clamping voltage (VC) at 10 A peak pulse current, 500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SA30HE3/73 datasheet, SA30HE3/73 pinout, SA30HE3/73 application, or SA30HE3/73 equivalent, this part is selected for robust ESD and surge protection in automotive body control modules, industrial sensor interfaces, and 24 V DC power input stages where reliability under repetitive transients and high-temperature operation up to 175 °C is required.
Technical Context
This TVS diode operates as a voltage-clamping device that remains non-conductive below its 30 V stand-off threshold and rapidly transitions to low-impedance conduction when transient voltages exceed its 33.3–36.8 V breakdown range. Its glass-passivated junction ensures stable leakage performance and long-term reliability under thermal cycling.
The SA30HE3/73 delivers 500 W peak pulse power handling with a 10/1000 µs waveform and maintains clamping at ≤48.4 V under 10 A transient current - critical for protecting downstream MOSFETs, microcontrollers, and CAN transceivers. Its AEC-Q101 qualification confirms suitability for automotive environments with operating junction temperatures from –55 °C to +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 30 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin for 24 V nominal systems. |
| VBR (Breakdown Voltage) | 33.3–36.8 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 48.4 V at IPPM = 10 A - Peak voltage seen by protected circuit during worst-case 10/1000 µs surge; limits stress on 5 V or 3.3 V logic. |
| PPPM (Peak Pulse Power) | 500 W - Sustains standardized 10/1000 µs surge without failure; supports IEC 61000-4-5 Level 3/4 compliance testing. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Ultra-low leakage preserves battery life and avoids false triggering in low-power sensor circuits. |
| TJ max | 175 °C - Enables placement near heat sources (e.g., power converters) in engine bay or industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive applications including temperature cycling, mechanical shock, and humidity testing per JESD22 standards. |
Pinout & Package
Package: DO-204AC (DO-15), axial lead, molded epoxy case with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. Polarity marked with cathode band (black ring) at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in forward bias | Connected to ground or lower-potential rail in uni-directional clamp configuration. |
| Cathode (banded end) | Current exit terminal in forward bias; high-impedance node in reverse bias | Connected to protected line (e.g., 24 V supply or CAN_H); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable VBR and low leakage across temperature extremes and long operational life. |
| 500 W peak pulse power (10/1000 µs) | Withstands repeated lightning-induced surges and inductive switching spikes common in vehicle power networks. |
| AEC-Q101 qualified | Validated for automotive under-hood and chassis applications requiring extended temperature and reliability validation. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving protection fidelity for sensitive ICs. |
| RoHS-compliant & whisker-tested (JESD 201 Class 2) | Supports lead-free reflow assembly and eliminates risk of tin whisker growth in high-reliability deployments. |
Applications
| Automotive Body Control Module (BCM) | Industrial 24 V Sensor Interface |
|---|---|
Use Scenario: Protection of LIN bus transceivers and power inputs against load dump and jump-start transients in vehicle door modules. IC Role / Device Role / Timing Role: Uni-directional clamping TVS placed between 24 V rail and ground, triggered only during positive overvoltage events. Use Value: Limits clamped voltage to 48.4 V, preventing damage to 40 V-rated power management ICs and ensuring system survival per ISO 7637-2 Pulse 5a. |
Use Scenario: Guarding analog output lines (0–10 V, 4–20 mA) of PLC analog I/O modules against field wiring surges. IC Role / Device Role / Timing Role: Standoff protection element on signal return path, absorbing induced energy from nearby AC motor drives. Use Value: 1.0 µA leakage at 30 V avoids loading precision current loops; 175 °C rating allows mounting directly on DIN-rail enclosure walls. |
| Telecom Power Input Stage | Medical Equipment DC Power Entry |
Use Scenario: Secondary surge suppression after MOV-based front-end filtering in PoE-powered network switches. IC Role / Device Role / Timing Role: Fast-response clamping device in parallel with DC/DC converter input, limiting residual transients to safe levels. Use Value: 48.4 V clamping ensures <50 V stress on 50 V-rated input capacitors and enables compact layout due to DO-15 footprint. |
Use Scenario: Overvoltage safeguard on isolated 24 V auxiliary supply feeding patient-monitoring analog front-ends. IC Role / Device Role / Timing Role: Fail-safe shunt protector on secondary-side DC rail, certified to AEC-Q101 for enhanced process reliability. Use Value: AEC-Q101 qualification provides documented process consistency and traceable lot data required for ISO 13485 medical BOMs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/52 (Vishay) | Same VWM/VBR/VC specs but SMA (DO-214AC) surface-mount package; 1.5 W steady-state power vs. 3.0 W for SA30HE3/73. | Preferred for automated SMT assembly; less suitable for through-hole prototyping or high-temperature through-hole PCBs. | Select SMAJ30A-E3/52 when board space is constrained and reflow compatibility is mandatory. |
| P6SMB33A (Littelfuse) | 33 V VWM, 36.7–40.6 V VBR, 53.3 V VC at 9.4 A; same DO-204AC package and 500 W rating; not AEC-Q101 qualified. | Lacks automotive qualification; acceptable for industrial/commercial use where AEC-Q101 is not mandated. | Choose P6SMB33A for cost-sensitive non-automotive designs requiring identical form factor and comparable clamping. |
Compared with SMAJ30A-E3/52 and P6SMB33A, the SA30HE3/73 uniquely combines AEC-Q101 qualification, 3.0 W steady-state dissipation, and axial-leaded DO-15 packaging - making it the preferred choice for automotive through-hole designs requiring validated reliability and thermal headroom.
Availability
SA30HE3/73 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power entry applications requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SA30HE3/73 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SA30HE3/73 belongs to Vishay's TRANSZORB® family of transient suppressors - engineered for robust, repeatable clamping performance in harsh electrical environments including automotive, industrial, and communications infrastructure.
FAQ
What is the maximum clamping voltage of the SA30HE3/73 under a 10 A transient?
The SA30HE3/73 has a maximum clamping voltage (VC) of 48.4 V when subjected to a 10 A peak pulse current with a 10/1000 µs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88378, page 2) and defines the upper voltage limit imposed on protected circuitry during surge events. The SA30HE3/73 maintains this clamping performance across its full operating temperature range.
Is the SA30HE3/73 suitable for automotive applications?
Yes, the SA30HE3/73 is AEC-Q101 qualified, confirming its suitability for automotive applications including body electronics, infotainment power supplies, and sensor interfaces. Its operating junction temperature range of –55 °C to +175 °C, glass-passivated junction, and DO-204AC construction meet stringent automotive reliability requirements. The SA30HE3/73 is explicitly listed in Vishay's AEC-Q101 qualified products table (Document Number: 88378, page 3, Note 1).
What does the "HE3" suffix indicate in SA30HE3/73?
The "HE3" suffix in SA30HE3/73 denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. Per Vishay documentation (Document Number: 88378, page 1), "HE3" parts feature matte tin-plated leads, comply with UL 94 V-0 flammability, and undergo enhanced process controls for automotive-grade reliability - distinguishing them from commercial-grade "E3" variants.
How does the SA30HE3/73 differ from bi-directional TVS diodes like SA30CA?
The SA30HE3/73 is a uni-directional TVS diode, meaning it clamps only positive transients relative to ground and behaves as a standard rectifier in forward bias. In contrast, SA30CA is bi-directional and clamps transients of either polarity. The SA30HE3/73 exhibits a cathode band marking and is used where polarity is known and unidirectional protection suffices - offering tighter VBR tolerance and lower VF than equivalent bi-directional types.
What is the steady-state power dissipation rating for SA30HE3/73?
The SA30HE3/73 has a steady-state power dissipation (PD) rating of 3.0 W when mounted on an infinite heatsink at a lead temperature (TL) of 75 °C, as specified in the "Maximum Ratings" table (Document Number: 88378, page 1). This rating supports continuous operation in thermally demanding environments and exceeds typical SMT alternatives like SMAJ30A (1.5 W), enabling higher ambient temperature margins in through-hole designs.
SA30HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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)
SA30HE3/73 FAQ
1.How can I place an order for SA30HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA30HE3/73 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 SA30HE3/73 reliable?
The price and inventory of SA30HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA30HE3/73 is usually 5 days.
3.What payment methods are accepted for SA30HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA30HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA30HE3/73?
SA30HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA30HE3/73 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 SA30HE3/73?
For technical support, including SA30HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA30HE3/73 requirements.
6.How does Aetrix verify that SA30HE3/73 is sourced from the original manufacturer or authorized distributors?
All SA30HE3/73 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 SA30HE3/73 meets industry standards.
7.What is the process for return or replacement of SA30HE3/73?
All SA30HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with SA30HE3/73, 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 SA30HE3/73 part is unused and in its original packaging.
Return procedure for SA30HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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