DEC H7082-AB Power Supply | Replacement, Equivalent & Selection Guide
The DEC H7082-AB is an industrial-grade power supply module manufactured by Digital Equipment Corporation (DEC), designed to deliver stable, regulated DC power to PDP-11 series minicomputer and legacy industrial control systems. This guide covers full technical specifications, compatible replacement models, selection criteria, and sourcing options to help engineers and procurement teams make confident decisions.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | H7082-AB |
| Manufacturer | DEC (Digital Equipment Corporation) |
| Series | PDP-11 / BA11 Backplane Power |
| Module Type | Regulated DC Power Supply |
| Output Voltages | +5 VDC, +12 VDC, -12 VDC (typical PDP-11 rail config) |
| Input Voltage | 100–240 VAC, 50/60 Hz |
| Form Factor | Rack-mount / Backplane integrated |
| Weight | 1,380 g |
| Cooling | Forced air (internal fan) |
| Protection | Overcurrent, overvoltage, thermal shutdown |
| Condition Available | Refurbished / New Old Stock (NOS) |
Note: Specifications are based on OEM documentation and verified supplier data. Contact us to confirm exact revision specs for H7082-AB.
Compatible Replacement & Equivalent Models
When the original H7082-AB is unavailable or cost-prohibitive, the following models are commonly evaluated as replacements. Always verify electrical compatibility before substitution:
| Model | Manufacturer | Compatibility Notes |
|---|---|---|
| H7082-AA | DEC | Earlier revision; same form factor, minor output tolerance differences |
| H7080 | DEC | Base model; lower output capacity — verify load requirements |
| H7861 | DEC | Higher-capacity successor; compatible with BA23/BA123 backplanes |
| H7864 | DEC | Enhanced replacement for VAX/PDP hybrid systems |
| Third-party PSU | Various | Custom-built replacements available; must match rail voltages and connector pinout |
⚠ Important: Substituting power supplies in legacy systems carries risk. Always cross-reference connector type, rail voltages, current ratings, and backplane slot compatibility before installation.
Why Choose the Original Model
- Guaranteed Pinout Compatibility: H7082-AB is a direct fit for PDP-11 BA11-series backplanes — no adapter or rewiring required.
- Validated Output Stability: OEM-spec voltage regulation ensures reliable operation of sensitive logic boards.
- Reduced Integration Risk: Eliminates the engineering overhead of validating third-party substitutes in certified systems.
- Spare Parts Continuity: Maintaining original part numbers simplifies maintenance records and regulatory compliance for legacy installations.
- Refurbished OEM Quality: Konmask sources and tests refurbished H7082-AB units to OEM performance standards.
Typical Applications
- PDP-11/23, PDP-11/44, PDP-11/73 minicomputer systems
- BA11-S, BA11-N, BA11-M backplane enclosures
- Legacy SCADA and DCS installations using DEC hardware
- Industrial process control systems in utilities, manufacturing, and defense
- Museum-grade and archival computing restoration projects
- University and research lab legacy system maintenance
System Compatibility
| System / Enclosure | Compatibility |
|---|---|
| PDP-11/23 (BA11-S) | ✅ Direct fit |
| PDP-11/44 (BA11-N) | ✅ Direct fit |
| PDP-11/73 (BA23) | ⚠ Verify revision — H7861 may be preferred |
| VAX-11/730 | ❌ Not compatible — different power architecture |
| MicroVAX II (BA23) | ⚠ Consult DEC field guide before use |
Selection Guide
Use the following decision framework to select the correct power supply for your system:
- Identify your backplane: Confirm BA11-S, BA11-N, or BA11-M designation on the enclosure label.
- Check rail requirements: Verify +5 V, ±12 V current draw from your installed boards using DEC system documentation.
- Match connector type: H7082-AB uses a specific DEC power connector — confirm pinout before ordering any replacement.
- Assess condition tolerance: For critical uptime systems, specify NOS (New Old Stock); for budget restorations, tested refurbished units are acceptable.
- Consider upgrade path: If migrating to a modernized backplane, evaluate H7861 or H7864 for higher headroom and longer support life.
Quality Assurance & Sourcing
- All H7082-AB units at Konmask.com are individually tested for output voltage accuracy, ripple, and thermal performance.
- Units are sourced from verified industrial decommissions, OEM surplus channels, and authorized distributors.
- Each unit ships with a test report and 90-day functional warranty.
- Anti-static packaging and foam-lined shipping boxes protect sensitive power components in transit.
- Traceability documentation available on request for regulated industries.
How to Order
- Add the DEC H7082-AB to your cart directly from this page.
- For bulk orders (5+ units) or urgent requirements, contact support@konmask.com for priority allocation.
- Provide your system model and backplane type when inquiring — our engineers will confirm compatibility before shipment.
- International shipping available to 50+ countries with full customs documentation support.
- Lead time: In-stock units ship within 1–3 business days; sourced units 7–15 business days.
Replacement & Compatibility FAQ
Q: Can I use H7082-AA instead of H7082-AB?
A: In most cases yes — the AA revision shares the same form factor and connector. However, output tolerance may differ slightly. Verify with your system’s power budget before substituting.
Q: Is the H7082-AB still manufactured?
A: No. DEC (later acquired by Compaq, then HP) discontinued this line. Units are available as NOS or refurbished stock only.
Q: Can a modern switching PSU replace the H7082-AB?
A: Technically possible with custom cabling, but not recommended for certified or regulated systems. Consult a qualified engineer before attempting.
Q: Do you offer repair services for failed H7082-AB units?
A: Yes — contact support@konmask.com with your unit’s fault description for a repair assessment and quote.
Q: What warranty applies to refurbished units?
A: All refurbished H7082-AB units carry a 90-day functional warranty covering output failure under normal operating conditions.
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