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Microchip Technology 681-1
- Part No.:
- 681-1
- Manufacturer:
- Microchip Technology
- Category:
- Diode Arrays
- Package:
- ND
- Datasheet:
-
681-1.pdf
- Description:
- DIODE MODULE GP 100V 15A ND
- Quantity:
- Payment:
- Shipping:
Inventory:6,792
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Product details
Overview
681-1 from Microsemi is a standard-recovery center-tap rectifier assembly in an electrically isolated aluminum case, rated for 15 A average DC output current at TC = 55 °C, 100 V VRWM, and 150 A nonrepetitive surge current - used in industrial AC/DC power supplies requiring high thermal robustness and electrical isolation.
For engineers reviewing the 681-1 datasheet, 681-1 pinout, 681-1 application, or 681-1 equivalent, key selection criteria include its 6.0 °C/W junction-to-case thermal resistance, 150 °C maximum junction temperature, center-tap positive (P) terminal configuration, RoHS-compliant matte tin terminations, and electrically isolated metal package for enhanced EMI immunity and safety-critical grounding.
Technical Context
This device integrates two series-connected standard-recovery diodes sharing a common cathode (center-tap positive configuration), enabling full-wave rectification from a center-tapped transformer secondary. Its aluminum case provides direct thermal conduction to heatsinks and galvanic isolation between AC input and DC output circuits.
Designed for line-frequency operation (50/60 Hz), it delivers 1.2 V forward voltage per leg at 10 A and exhibits controlled avalanche behavior under transient overvoltage conditions - critical for unregulated power supplies with minimal filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 100 V - maximum continuous reverse voltage before breakdown; defines safe operating limit in bridge or center-tap topologies |
| IO @ TC = 55 °C | 15 A - average DC output current capability with adequate heatsinking at 55 °C case temperature |
| IFSM | 150 A - peak nonrepetitive surge current tolerance during cold-start or fault transients |
| TJ max | +150 °C - maximum allowable junction temperature; enables operation in high-ambient industrial environments |
| RθJC | 6.0 °C/W - thermal resistance from junction to case; determines minimum heatsink requirement for thermal design |
| VF @ 10 A | 1.2 V per leg - forward voltage drop defining conduction loss and thermal load at rated current |
| IR @ 100 V | 10 µA @ 25 °C - low reverse leakage ensuring minimal standby power loss and stable DC bus hold-up |
Pinout & Package
Package: ND - electrically isolated aluminum case with matte tin (RoHS-compliant) terminals; weight ≈30 g; dimensions per Microsemi drawing: D = 56.9–57.4 mm, E = 47.5–47.75 mm, F = 37.59–37.85 mm, C (dia) = 4.19–4.45 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | Alternating current input (leg 1) | Connects to one end of center-tapped transformer secondary; carries half-cycle forward current |
| AC2 | Alternating current input (leg 2) | Connects to opposite end of center-tapped transformer secondary; carries complementary half-cycle current |
| + | Cathode (center tap, positive output) | Common cathode node delivering full-wave rectified positive DC output; referenced as system ground return |
| – | Anode (negative reference) | Isolated negative terminal; used for chassis grounding or floating bias reference in isolated supplies |
Key Features
| Feature | Design Value |
|---|---|
| Electrically isolated aluminum case | Provides >1000 V isolation between AC inputs and DC output terminals - eliminates need for additional insulation barriers in safety-critical designs |
| Controlled avalanche characteristics | Enables reliable energy clamping during inductive switching transients without destructive failure - supports ruggedized transformerless or low-filtering topologies |
| 150 °C junction rating | Permits sustained operation in enclosed enclosures or high-ambient environments (e.g., motor drives, welding equipment) without derating penalties |
| 6.0 °C/W RθJC | Allows efficient heat transfer to external heatsinks - reduces required heatsink mass by ~40% vs. comparable plastic-packaged rectifiers |
Applications
| Industrial AC/DC Power Supplies | Welding Equipment Power Stages |
|---|---|
Use Scenario: Unregulated full-wave rectification in 3 kW industrial bench power supplies with center-tapped transformers and minimal output capacitance. IC Role / Device Role / Timing Role: Center-tap positive rectifier assembly performing AC-to-DC conversion with inherent galvanic isolation between primary and secondary sides. Use Value: Aluminum case enables direct mounting to chassis for passive cooling, while 150 °C TJ rating sustains operation during extended duty cycles without forced air. | Use Scenario: High-current DC bus generation in IGBT-based arc welders subject to repetitive 150 A surge currents and 100 °C ambient temperatures. IC Role / Device Role / Timing Role: Primary rectifier handling 50/60 Hz line frequency with controlled avalanche response to inductive kickback from welding transformer windings. Use Value: 150 A IFSM and 6.0 °C/W RθJC allow repeated surge handling without thermal runaway - eliminating need for parallel devices or active cooling. |
| Motor Drive DC Link Rectification | Test Equipment High-Voltage Bias Supplies |
Use Scenario: DC link charging in 400 VAC variable-frequency drives where transformer-isolated auxiliary supplies require compact, thermally robust rectification. IC Role / Device Role / Timing Role: Center-tap rectifier converting transformer secondary voltage to isolated ±VDC rails for gate driver and control logic supplies. Use Value: Electrically isolated case eliminates ground loop risks between power stage and control circuitry - improving noise immunity and measurement accuracy. | Use Scenario: Precision high-voltage bias generation in semiconductor parameter analyzers requiring stable 100 V DC with <10 µA leakage and minimal thermal drift. IC Role / Device Role / Timing Role: Low-leakage rectifier assembly providing clean, isolated DC output from center-tapped filament transformers. Use Value: 10 µA IR @ 100 V and 150 °C TJ stability ensure consistent bias voltage across temperature extremes - critical for sub-picoampere measurement fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard-recovery center-tap rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-15CPH01-M3 | Same 100 V VRWM, 15 A IO, but TO-247AC package with non-isolated plastic body and higher RθJA (40 °C/W) | Lacks electrical isolation; requires external insulation and larger heatsink for equivalent thermal performance | Select when PCB-mounting and isolation is handled elsewhere; avoid in safety-critical or chassis-grounded systems |
| ON Semiconductor MUR1520CT | Fast-recovery variant (200 V VRWM, 500 ns trr); lower VF (1.1 V @ 10 A) but only 125 °C TJ rating and no isolated case | Better for high-frequency switching noise suppression but unsuitable for high-ambient or isolation-dependent applications | Prefer for SMPS auxiliary supplies; not recommended for line-frequency industrial rectification requiring isolation or >125 °C operation |
Compared with VS-15CPH01-M3 and MUR1520CT, the 681-1 uniquely combines electrically isolated packaging, 150 °C junction rating, and 6.0 °C/W thermal resistance - making it irreplaceable in thermally constrained, safety-isolated, or high-ambient industrial rectification where reliability outweighs cost or footprint.
Availability
681-1 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, welding equipment power stages, and motor drive DC link rectification requiring stable component supply, long lifecycle support, and traceable sourcing.
Supply support for 681-1 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
Microsemi Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal ICs, discrete power devices, and radiation-hardened components.
The 681(e3) series was designed specifically for ruggedized, thermally demanding line-frequency rectification in industrial, aerospace, and medical power systems where electrical isolation, surge resilience, and extended temperature operation are mandatory.
FAQ
What is the terminal configuration of the 681-1?
The 681-1 uses a center-tap positive (P) configuration: two AC input terminals (AC1 and AC2), one common cathode (+) output terminal, and one isolated anode (–) terminal. This allows full-wave rectification with inherent electrical isolation between AC and DC sides - confirmed in Microsemi's RF01151 Rev A datasheet, page 2, "Terminal Configuration" section.
Does the 681-1 have RoHS compliance?
Yes, the 681-1 is RoHS compliant, indicated by the "(e3)" suffix in its full part number designation. It features matte tin terminations and meets Directive 2011/65/EU requirements - explicitly stated in the "FEATURES" section and "PART NOMENCLATURE" table of the RF01151 datasheet.
What is the maximum junction temperature rating for the 681-1?
The 681-1 has a maximum junction temperature (TJ) of +150 °C, as specified in the "MAXIMUM RATINGS" table on page 1 of the RF01151 datasheet. This rating enables reliable operation in high-ambient environments such as enclosed industrial cabinets or near heat-generating components without thermal derating below 100 °C case temperature.
How does the 681-1 achieve electrical isolation?
The 681-1 achieves electrical isolation via its electrically isolated aluminum case - the metal housing is internally insulated from all terminals, providing >1000 V isolation between AC inputs and DC outputs. This is a structural feature of the ND package, not an external add-on, and is highlighted in both the "DESCRIPTION" and "APPLICATIONS / BENEFITS" sections of the RF01151 datasheet.
What is the forward voltage drop of the 681-1 at rated current?
The 681-1 exhibits a maximum forward voltage (VF) of 1.2 V per leg at 10 A and 25 °C, as listed in the "ELECTRICAL CHARACTERISTICS" table on page 3 of the RF01151 datasheet. This value directly determines conduction losses and thermal loading in full-wave rectifier designs operating near rated current.
681-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- ND
- Packaging:
- Bulk
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Series Connection
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io) (per Diode):
- 15A
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 10 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 100 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Chassis Mount
- Supplier Device Package:
- ND
681-1 FAQ
1.How can I place an order for 681-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 681-1 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 681-1 reliable?
The price and inventory of 681-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 681-1 is usually 5 days.
3.What payment methods are accepted for 681-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 681-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 681-1?
681-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 681-1 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 681-1?
For technical support, including 681-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 681-1 requirements.
6.How does Aetrix verify that 681-1 is sourced from the original manufacturer or authorized distributors?
All 681-1 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 681-1 meets industry standards.
7.What is the process for return or replacement of 681-1?
All 681-1 units undergo pre-shipment inspection (PSI). If there is an issue with 681-1, 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 681-1 part is unused and in its original packaging.
Return procedure for 681-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
681-1 Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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